Patent ID: 12185863

DESCRIPTION OF THE EMBODIMENTS

Clear and intact description will be made on technical solution in the embodiment of the present invention below in combination with drawings in the embodiment of the present invention. The described embodiments are merely a part of embodiments of the present invention and are not all the embodiments. On a basis of the embodiments in the present invention, all other embodiments obtained by those skilled in the technical field without creative efforts fall into the scope of protection of the present invention.

It is a core of the present invention to provide a brewing cavity. When the brewing cavity is used for brewing coffee, a relatively large pressure can be formed in the brewing cavity, and the sealing property of the brewing cavity is better, such that liquid leakage is avoided when the coffee is brewed.

It is thereof another core of the present invention to provide a coffee brewer including the brewing cavity.

Referring to theFIG.1toFIG.13,FIG.1is a three-dimensional exploded view of the coffee brewer provided by the present invention;FIG.2is a structural schematic view of the brewing head and the brewing bracket provided by the present invention;FIG.3is a structural schematic view of the brewing assembly provided by the present invention;FIG.4is a structural schematic view of the grounds discharging portion provided by the present invention;FIG.5is a structural schematic view of the brewing chamber provided by the present invention during rotation;FIG.6is a structural schematic view of the brewing head provided by the present invention during the brewing head pushes downward to discharge grounds;FIG.7is a structural schematic view of the brewing head provided by the present invention after the brewing head pushes downward to discharge grounds;FIG.8is a front view of the brewing head provided by the present invention after the brewing head pushes downward for brewing;FIG.9is a side view of the brewing head provided by the present invention after pushing brewing;FIG.10is a front view of the brewing head provided by the present invention during upward movement;FIG.11is a side view of the brewing cavity provided by the present invention;FIG.12is a section view of the first motor provided by the present invention driving the brewing head to move upwards via screw rods;FIG.13is a section view of the first motor provided by the present invention driving the brewing head to move downwards via screw rods.

The brewing cavity provided by the present invention includes the brewing cavity shell4rotatably arranged below the brewing assembly. The brewing cavity shell4is internally provided with the brewing chamber401for brewing coffee. The brewing cavity shell4is provided with a brewing cavity opening402that allows the brewing assembly to enter the brewing chamber401to compact coffee powder in the brewing chamber401and create a brewing pressure for the coffee. A bottom portion of the brewing chamber401is provided with a groove490with an inner diameter less than an inner diameter of the brewing chamber401, the side wall of the groove490is provided with the coffee outlet4.72, and the coffee outlet4.72is communicatively connected with the exterior.

The bottom portion of the groove490is provided with the through hole460with the axis consistent with the axis of the brewing chamber401. The inner wall of the through hole460is provided with the coffee seal ring4.6. The upper end surface of the groove490is fixedly provided with the pressure sealing water outlet element3.3. The pressure sealing water outlet element3.3is provided with the coffee outlet hole302communicated with the coffee outlet4.72, and the filtering portion3.2for filtering coffee is arranged above the pressure sealing water outlet element3.3.

The filtering portion3.2is provided with the first sliding hole3.4. The pressure sealing water outlet element3.3is provided with the second sealing sliding hole301. The coffee seal ring4.6is provided with the third sealing sliding hole470. The first sliding hole3.4, the second sealing sliding hole301and the third sealing sliding hole470are internally provided with a discharge portion capable of sliding along the through hole460axially. The discharge portion is at least sealedly and slidably connected to the third sealing sliding hole470.

The discharge portion can slide up and down in the first sliding hole3.4, the second sealing sliding hole301and the third sealing sliding hole470, to finish operation of compacting the coffee powder, discharging the coffee grounds and the like. The discharge portion is at least sealedly and slidably connected to the third sealing sliding hole470. Through sealing connection, leakage of the coffee powder or the coffee liquid can be avoided, and meanwhile, the first sliding hole3.4, the second sealing sliding hole301and the third sealing sliding hole470can be provided in a same longitudinal axis, such that it is convenient for the discharge portion to slide, thereby guaranteeing the stability of the discharge portion during sliding without deviation. The coffee liquid can flow to the exterior via the coffee outlet4.72communicatively connected with the exterior for a user to drink.

The brewing cavity401is used for brewing coffee. When coffee is brewed, the brewing assembly enters the brewing chamber401along the brewing cavity opening402to compact the coffee powder in the brewing chamber401and create a brewing pressure for the coffee so as to complete the brewing of the coffee. In the brewing process, the pressure in the brewing chamber401will be increased, and the brewed coffee will be discharged downwards via the coffee outlet302in the pressure sealing element3.3along the filtering portion3.2.

The bottom portion of the brewing cavity shell4provided by the present invention is provided with the groove490. The bottom portion of the groove490is provided with the through hole460. The through hole460is internally provided with the coffee seal ring4.6. The discharge portion capable of sliding axially along the through hole460is sealedly and slidably connected to the coffee seal ring4.6. The through hole460and the brewing chamber401are consistent in axis, and the discharge portion can move along the axis of the brewing chamber401, such that the discharge portion can discharge residual coffee grounds in the brewing chamber401after brewing coffee, thereby preparing for next time of coffee brewing.

The brewing cavity opening402is provided in the upper portion of the brewing cavity shell4. As the brewing cavity shell4is rotatable, when it is needed to brew coffee, the brewing cavity shell is rotated until the brewing cavity opening402is aligned with the brewing assembly to brew coffee, and after the coffee is brewed, the brewing cavity shell is rotated until the discharge portion is aligned with the brewing assembly, and the brewing assembly pushes the discharge portion to discharge the coffee grounds.

The first sliding hole3.4, the second sealing sliding hole301and the third sealing sliding hole470are internally provided with the discharge portion capable of sliding axially along the through hole460, and the discharge portion penetrate through the first sliding hole3.4, the second sealing sliding hole301and the third sealing sliding hole470simultaneously. When coffee is brewed, only the coffee outlet hole302is communicated with the coffee outlet4.72in the brewing chamber401, and the coffee outlet4.72is communicated with outer side. When the discharge portion is sealedly and slidably connected to the third sealing sliding hole470, the through hole460in the bottom portion of the groove490is blocked to prevent liquid leakage when the coffee is brewed. In addition, as the pressure sealing water outlet element3.3is fixedly arranged on the upper end surface of the groove490and does not move along with movement of the discharge portion, and wear of the pressure sealing water outlet element3.3is prevented, thereby increasing the internal pressure in the brewing chamber401when the coffee is brewed.

Based on the above specific embodiment, the inner wall of the through hole460is provided with the sealing element fixing position protruding radially inwards. The coffee seal ring4.6is the I-shaped seal ring, and the I-shaped seal ring is clamped on the top surface and the bottom surface of the sealing element fixing position. It should be noted that the second sealing element fixing position is annular and extends inwards along the radial direction of the inner wall of the through hole460to form the fixed ring. The I-shaped seal ring includes a top surface ring, a bottom surface ring and a middle cylinder connected to the top surface ring and the bottom surface ring. The top surface ring and the bottom surface ring are consistent in inner diameter, and the inner diameter of the top surface ring and the inner diameter of the bottom surface ring are consistent with the diameter of the middle cylinder. A middle through hole of the middle cylinder is the third sealing sliding hole470. The top surface ring is provided in the upper end surface of the middle cylinder, and the bottom surface ring is arranged on the bottom surface of the middle cylinder and is I-shaped on a lateral surface. The outer diameter of the middle cylinder is matched with the inner diameter of the second sealing element fixing position. After the middle cylinder is mounted in the second sealing element fixing position, the top surface ring is attached to the top surface of the sealing element fixing position, and the bottom surface ring is attached to the bottom surface of the sealing element fixing position. The I-shaped seal ring provided by the embodiment is better in sealing property, such that coffee is further prevented from leaking from the through hole460.

Based on the specific embodiment, the discharge portion comprises the discharge push rod3and the discharge element arranged at the upper end of the discharge push rod3, and the discharge push rod3is at least sealedly and slidably connected to the third sealing sliding hole470. It should be noted that, the discharge element may be a discharge plate3.1or a bracket or a spiral rack, and the discharge plate3.1may be a pore plate with a through hole in the surface of the plate, and a preset distance may be arranged between the discharge element and the inner wall of the brewing chamber401to prevent the discharge element from rubbing with the inner wall of the brewing chamber401during discharging. The discharge element is attached to the upper portion of the filtering portion3.2to place the coffee grounds.

Based on the specific embodiment, the filtering portion3.2is the metal filter screen or the plastic filter screen, and the pressure sealing water outlet element3.3is the silica gel element or the rubber element, and the coffee seal ring4.6is the silica gel element or the rubber element. It should be noted that, as it is unnecessary to guarantee the sealing for the first sliding hole3.4, the metal element which is larger in hardness and longer in service life can be adopted or the plastic element which is lower in cost and smaller in weight can be adopted. As it is necessary to seal the second sealing sliding hole301and the third sealing sliding hole470, it is necessary to select the silica gel element or the rubber element with certain elasticity. Further, the pressure sealing water outlet element3.3can be made from the silica gel or rubber material, such that the pressure sealing water outlet element is better in sealing property, stable in property and unlikely to be corroded.

Based on the specific embodiment, the coffee outlet hole302is provided in one side of the second sealing sliding hole301, or the coffee outlet hole302is provided in the second sealing sliding hole301. It should be noted that when the coffee outlet hole302is provided in one side of the second sealing sliding hole301, the pressure sealing water outlet element3.3is provided with two holes, and the second sealing sliding hole301is an axle hole being machined along the axial direction of the pressure sealing water outlet element3.3, and the coffee outlet hole302is provided in other parts of the pressure sealing water outlet element3.3and is not superposed with the second sealing sliding hole301. When the coffee outlet hole302is provided in the second sealing sliding hole301, the coffee outlet hole302and the second sealing sliding hole301both are provided in the axial direction of the pressure sealing water outlet element3.3, and the two holes are superposed.

The present invention further provides a coffee brewer including the shell internally provided with the brewing cavity of any one of the above embodiments. After the shell is internally provided with the brewing cavity of any one of the above embodiment, the sealing property of brewing coffee can be improved, and the liquid leakage phenomenon generated when the coffee is brewed is prevented.

As a ground discharge structure of a coffee powder extrusion system in the prior art is too complex and is not suitably applied to a common coffee brewer, the price of the coffee brewer is high, such that promotion and use are not facilitated. In addition, in other types of coffee brewers, the coffee grounds are further discharged by additionally arranging a coffee plate hanging apparatus or a water spraying apparatus, and similarly, the coffee brewer is complex in structure and high in cost.

On account of the defects, based on the embodiment, further preferably, the brewing assembly includes the brewing head1.9movably arranged in the shell in an up-down direction, and the brewing cavity shell4is rotatably arranged below the brewing head1.9and a top portion of the brewing cavity shell4is provided with a diameter of the brewing cavity opening402matched with a diameter of the brewing head1.9. The bottom portion of the brewing cavity shell4is provided with a discharge portion that is in tightly contact with the side wall of the brewing cavity shell4and can move along the brewing cavity shell4. The brewing head1.9is connected with the first power portion for driving the brewing head1.9to move, and the brewing cavity shell4is connected with the second power portion for driving the brewing cavity shell4to rotate. When coffee is brewed, the second power portion drives the brewing cavity shell to rotate, such that the brewing cavity opening402is opposite to the brewing head1.9, and the brewing head1.9is driven by the first powder portion to move downwards to extend into the brewing cavity shell4to compact coffee powder in the brewing cavity shell4and generate a brewing pressure to the coffee. When coffee grounds are discharged, the second power portion drives the brewing cavity shell4to rotate reversely, such that the discharge portions are opposite to the brewing head1.9, and the brewing head1.9is driven by the first power portion to move downwards to push the discharge portion to move downwards, such that the discharge portions push the coffee grounds in the brewing chamber4to be discharged from the brewing cavity opening402.

According to the shell, i.e., the carrier for fixing parts of the coffee brewer such as the brewing head1.9and the brewing cavity shell4, the specific shape and dimension are selected according to dimensions of parts needed to be mounted. The brewing head1.9can be driven by the first power portion to move up and down. The brewing head and the first power portion may be directly connected to each other via parts such as a bolt and so on or may be indirectly connected to each other parts such as a curved bar, as long as it is an arrangement mode which realizes that the brewing head1.9moves up and down. As the brewing head1.9needs to extend into the brewing cavity opening402to compact the coffee in the brewing cavity shell4, the brewing head1.9is usually a cylindrical brewing head matched with the brewing cavity opening402in diameter and can be manufactured by a plastic and the like.

It should be noted that the brewing cavity shell4can rotate under drive of the second power portion. Specifically, the brewing cavity shell4can overturn up and down, i.e., the brewing cavity opening402in the top portion of the brewing cavity shell4can be rotated from the upper side to the lower side, and the discharge portion arranged at the bottom portion of the brewing cavity shell4can be rotated from the lower side to the upper side. Thus, with respect to the object of the arrangement, it is convenient for the brewing head1.9to push the discharge portion to discharge the coffee grounds in the brewing cavity shell4directly.

The coffee brewer provided by the invention is provided with the brewing head1.96capable of being driven by the first power portion to move up and down and the rotatable brewing cavity shell4. The diameter of the brewing head1.9is matched with that of the brewing cavity opening402of the brewing cavity shell4, and the brewing head can extend into the brewing cavity opening402and is in tight contact with the side wall of the brewing cavity shell4to create a brewing pressure for the coffee in the brewing cavity shell4, such that the coffee powder and the hot water are fully mixed, and meanwhile, after the coffee is brewed, a part of coffee grounds will be left in the brewing cavity shell4. At the moment, it is only needed to drive the brewing cavity shell4to rotate reversely by the second power portion to rotate the discharge portion at the bottom portion of the brewing cavity shell4from the lower side of the shell to the upper side in a position opposite to the brewing head1.9. As the discharge portion is in tight contact with the side wall of the brewing cavity shell4, i.e., the discharge portion can be taken as a bottom plate of the brewing cavity shell4, it is not needed to arrange a bottom plate additionally, such that the cost is lowered. The discharge portion can move along the brewing cavity shell4, and the brewing head1.9moves downwards to press the discharge portion, and the discharge portion pushes the coffee grounds left on positions such as the side wall of the brewing cavity shell4downwards to discharge the coffee grounds from the brewing cavity opening402located below the shell at the moment.

According to the coffee brewer provided by the present invention, by arranging the brewing head1.9and the rotatable brewing cavity shell4provided with the discharge portion at the bottom, sealed brewing and ground discharging operations of coffee are realized at the same time, and it is only needed to rotate the brewing cavity shell to switch the sealed brewing and ground discharging operations. The coffee brewer is easy and convenient to operate, simple in integral structure and low in production cost, and it is not needed to arrange other ground discharge parts additionally.

Discharge portion includes the discharge push rod3and the discharge element arranged at the upper end of the discharge push rod3. The lower portion of the discharge push rod3is fixedly connected to the pressure plate4.3. The pressure plate4.3is connected to the outer wall of the brewing cavity shell4via an elastic element. One end of the elastic element abuts against the lower end surface of the through hole460while another end of the elastic element abuts against the pressure plate4.3. The discharge element is attached to the upper portion of the filtering portion3.2via the elastic element. The brewing head1.9pushes the pressure plate4.3downwards to drive the discharge element to move downwards to discharge the coffee grounds, and the elastic element is used for driving the pressure plate4.3to be restored to an original position after discharging the coffee grounds.

It should be noted that the discharge portion includes the discharge push rod3and the discharge element arranged on the top portion of the discharge push rod3and matched with the brewing cavity shell4in diameter, and the bottom portion of the discharge push rod3is connected to the pressure plate4.3which is used for contacting with the brewing head1.9, and the brewing head1.9pushes the pressure plate4.3downwards to drive the discharge element to move downwards to discharge the coffee grounds.

It can be understand that as a part of coffee grounds may be left on the side wall of the brewing cavity shell4, the discharge element is thus arranged to be matched with the brewing cavity shell4in diameter, generally a round plastic plate. When the discharge element moves downwards, the coffee grounds on the side wall of the brewing cavity shell4can be scraped to be driven to be discharged downwards via the brewing cavity opening402, and the bottom portion of the discharge push rod3is connected to the pressure plate4.3, and the pressure plate4.3is larger than the discharge push rod3in area. It is an object of arranging the pressure plate4.3to improve the contact area between the brewing head1.9and the discharge portion, guaranteeing that the brewing head1.9can push the discharge portion to move smoothly. The discharge element can be further replaced in form of a discharge rack and the like. Certainly, the specific structure of the discharge portion is not limited to the above manner, and the user can arrange the specific structure flexibly according to an actual condition.

Specially, the brewing assembly includes the brewing cavity shell4, the supporting cover4.1, the handle4.2and the grounds discharging portion55. The brewing assembly is at least provided with the brewing cavity shell4and the grounds discharging portion55. The longitudinal axis k of the brewing cavity shell4is provided with the brewing chamber401. The brewing chamber401is provided with the brewing cavity opening402. The bottom portion of the brewing chamber401is provided with the through hole460and the lower portion of the brewing chamber is provided with the coffee outlet4.72, and the liquid outlet pipe4.7is arranged outside the coffee outlet4.72in a penetrating manner. The bottom portion of the brewing cavity shell4is provided with the downward opened discharge port2.10, and the first brewing head movement microswitch2.11and the second brewing head movement microswitch2.12for controlling the brewing head1.9to move up and down.

The elastic element is the reset spring4.4, and the lower end of the discharge push rod3penetrates through the middle hole403of the reset spring4.4and is connected to the pressure plate4.3. The reset spring4.4is a spiral spring, and the spring of such structure is relatively low in cost and convenient to disassemble.

In a specific embodiment with respect to the first power portion, the first power portion includes the first motor1and the convex driving curved bar1.3connected to the rotating shaft of the first motor1, and the swing portion1.33on the top portion of the driving curved bar1.3is rotatably connected to the top portion of the brewing head1.9via the oscillating bar, such that the brewing head1.9moves along the linear channel2.6arranged in the shell.

The first motor1can be electric motors such as a direct current motor, an asynchronous motor and a synchronous motor frequently used in the prior art. The rotating shaft of the first motor1is connected to one end of the driving curved bar1.3via parts such as a bolt and so on. The swing portion1.33on the top portion of the curved bar1.3is a rod body with a convex top. The distance between the highest point and the lowest point when the swing portion1.33rotates is the distance that the brewing head1.9moves up and down. As the swing portion1.33has a transverses displacement when rotates, in order to ensure movement of the brewing head1.9to be a linear movement, the swing portion1.33is rotatably connected to the top portion of the brewing head1.9via the oscillating bar1.7, and the oscillating bar1.7rotates together with the swing portion1.33without affecting movement of the brewing head1.9along the linear channel arranged in the shell.

Specifically, the first motor1is rotatably connected to the driving curved bar1.3. Two ends of the driving curved bar1.3are respectively provided with the first bearing1.2and the second bearing1.6rotatably connected to the brewing bracket2. The first motor1is connected to one end of the driving curved bar1.3via an adapter1.1to transmit and is provided with the microswitch driving position1.11to control the first motor1. Another end of the driving curved bar1.3is fixedly connected to the brewing bracket2through the limiting block1.5in a positioned manner. A swing position in the middle of the driving curved bar1.3is rotatably connected to the oscillating bar1.7. The driving curved bar1.3is rotatably connected to the upper portion of the oscillating bar1.7in a positioned manner by an upper oscillating bar element1.4. The swing position of the driving curved bar1.3rotatably controls the oscillating bar1.7to move up and down, the oscillating bar1.7is rotatably connected to the brewing head1.9via the first rotating shaft1.8, and the oscillating bar1.7drives the brewing head1.9to move up and down in the brewing chamber401and control the discharge push rod3to stretch to discharge the coffee grounds.

Alternately, as a second preferred solution, the rotating shaft of the first motor1and the top portion of the brewing head1.9are rotatably connected to each other to drive via the screw901, such that the brewing head1.9moves along the linear channel2.6arranged in the shell. The brewing head is provided with the water inlet joint or the lug, and the brewing bracket2is provided with the sliding groove904that is consistent with the length direction of the screw901and is slidably matched with the water inlet joint903or the lug.

It should be noted that, the sliding groove904is provided in the outer side wall of the brewing bracket2, and the opening direction of the sliding groove904is consistent with that of the brewing cavity opening402. The water inlet joint903on the brewing head1.9or the lug is slidably arranged in the sliding groove904along the length direction of the sliding groove904. When the screw901rotatably drives the brewing head1.9to move, the brewing head1.9is easy to rotate together with the screw901, and the brewing head1.9is provided with the water inlet joint903or the lug to prevent the brewing head1.9from rotating in the brewing chamber401, such that the brewing head1.9is driven by the screw901to move linearly only.

Two sides of the rotating shaft of the first motor1are provided with microswitch driving positions1.11to control left and right rotating angles of the rotating shaft of the first motor1. The brewing head1.9is controlled to move up and down at a distance via the microswitch driving positions1.11. Specifically, the brewing head1.9is provided with the screw hole902along the direction of the linear channel2.6, and the bolt901is screwed into the screw hole902. When the first motor1drives the bolt901to rotate, under interaction between the bolt901and the screw hole902, the brewing head1.9will move along the linear channel2.6.

The bottom portion of the brewing chamber401is provided with a feed opening2.7. A longitudinal axis M is arranged perpendicularly or obliquely. A transverse axis H of the brewing bracket2is provided with a positioning rotating hole2.8. The transverse axis H is arranged horizontally or obliquely. The grounds discharging portion55is at least provided with the discharge push rod3. The discharge push rod3is provided with the discharge element, the filtering portion3.2, the pressure sealing water outlet element3.3, the coffee seal ring4.6, the reset spring4.4and the pressure plate4.3from top to bottom in sequence. The grounds discharging portion55is arranged on two sides of the through hole460of the brewing chamber401of the brewing cavity shell4. The discharge push rod3is slidably connected in the through hole460or the coffee seal ring4.6. The discharge element on the discharge push rod3and the pressure plate4.3clamp and connect the filtering portion3.2, the pressure sealing water outlet element3.3, the coffee seal ring4.6and the reset spring4.4. Or, the discharge element on the discharge push rod3and the pressure plate4.3clamp and connect the filtering portion3.2, the pressure sealing water outlet element3.3and the reset spring4.4. The discharge element is fixed to the upper portion of the discharge push rod3, and the discharge push rod3passes through the first sliding hole3.4in the filtering portion3.2, the second sealing sliding hole301in the pressure sealing water outlet element3.3, the through hole460in the bottom portion of the brewing chamber401and the reset spring4.4in sequence and is fixedly connected to the pressure plate4.3. The filtering portion3.2is arranged on the upper portion of the pressure sealing water outlet element3.3. A screw is fixedly arranged on the lower portion of the brewing chamber401and is located at the coffee outlet4.72at the bottom portion of the brewing chamber401and the upper portion of the coffee seal ring4.6. The filtering portion3.2is sealedly connected to the brewing chamber401via the side portion or the bottom portion of the pressure sealing water outlet element3.3. The through hole460and the coffee seal ring4.6are integrally arranged or arranged in a split manner. A middle through hole passes through the discharge push rod3, the outer tooth4.71, the coffee outlet4.72and the liquid outlet pipe4.7are arranged on the transverse axis H and are rotatably connected to the brewing bracket2. The supporting cover4.1is rotatably locked in the cavity2.9via the brewing assembly to rotate the liquid outlet pipe4.7of the brewing assembly to enter the first spigot2.13, the second spigot2.41and the third spigot2.42in sequence to rotate and position. The brewing cavity shell4enters the inner side of the cavity2.9. The supporting cover4.1is packaged in the first spigot2.13, the supporting cover4.1is fixedly provided with the handle4.2to drive to be in locked connection with the buckling position2.14in a concentric locating manner, and the supporting cover4.1is fixedly and rotatably connected to the brewing cavity shell4. The shell is provided with the brewing cavity positioning switch assembly2.2for positioning the brewing cavity shell4.

Preferably, the filtering portion3.2is provided with the filtering hole3.5, the first sliding hole3.4and the fixed position. The first sliding hole3.4is provided in the middle. The periphery of the first sliding hole3.4is provided with the filtering hole3.5, and the periphery of the filtering hole3.5is provided with a turnup to prevent deformation. The pressure sealing water outlet element3.3is provided with the second sealing sliding hole301and the coffee outlet hole302. The pressure sealing water outlet element3.3is at least provided with the coffee outlet hole302, and the coffee outlet hole302is formed in a pinhole pressure-maintaining manner. The filtering portion3.2and the pressure sealing water outlet element3.3are adaptively and sealedly arranged in a fit manner. A gap is provided between the filtering portion3.2and the pressure sealing water outlet element3.3for the convenience of flow of a coffee liquid. A gap is provided between the coffee outlet hole302and the bottom portion of the brewing chamber401is formed for the convenience of flow of the coffee liquid, and the second sealing sliding hole301is slidably and sealedly connected to the discharge push rod3and is up-and-down slidable to the discharge push rod3. The pressure plate4.3is arranged in a cambered manner and is arranged consistently with the cambered surface of the periphery of the transverse axis H of the brewing cavity shell4. The pressure plate4.3is provided with the pressure plate rotating shaft4.5. The reset spring4.4is arranged in a tower-shape, such that the compression spatial distance is reduced; the pressure plate4.3is provided with the pressure plate rotating shaft4.5, such that the brewing head1.9can push out coffee grounds when the pressure plate4.3rotates, and the pressure plate rotating shaft4.5is rotatably connected to the brewing head1.9, thereby reducing the friction force.

Preferably, the water inlet hole1.91is communicatively connected to the brewing chamber401via the dividing cap. The water inlet hole1.91is communicatively connected to the ventilation pipe1.20. The lower portion of the brewing chamber401is provided with the coffee outlet4.72in a penetrating manner. The coffee outlet4.72penetrates the liquid outlet pipe4.7, and the liquid outlet pipe4.7penetrates outside.

In order to guarantee that the brewing head1.9does not move when brewing coffee, in the specific embodiment, the shell is provided with the limiting block1.5for limiting rotation of the driving curved bar1.3, and the limiting block1.5is arranged on the rotating track on one side of the driving curved bar1.3to prevent the brewing head1.9from moving upwards or swinging under the action of hot water in the brewing cavity shell4during water ingress.

There is only one limiting block1.5usually and the limiting block1.5is arranged on the rotating track on one side of the driving curved bar1.3, such that it is ensured that when it is needed to move the brewing head1.9upwards, the driving curved bar1.3can rotate to the highest point toward the other side. Specifically, the up-down swing distance of the swing portion1.33of the driving curved bar1.3is an up-down moving distance of the brewing head1.3, i.e., the brewing head moves downwards to compact coffee powder, such that resistance of a water flow barrier when the coffee powder is brewed is converted into a water pressure. The osculating bar1.7is provided between the driving curved bar1.3and the brewing head1.9to control the brewing head1.9to move linearly in the linear channel2.6in a limited manner to reduce the swing distance and to be sleeved and positioned precisely with the brewing cavity opening402. A lower rotating track of the swing portion1.33is provided with a curved bar stopping portion1.51, and the curved bar stopping portion1.51is arranged on an axis B to stop the swing portion1.33, such that the brewing chamber401generates a brewing pressure. The brewing pressure is at least greater than 10 barometric pressure or a pressure of 10 Pa. The axis B is arranged in a swing advancing direction of the driving curved bar1.3and passes through the center of the driving curved bar1.3to press the axis A downwards to form an included angle C, wherein the axis A is a concentric axis between the brewing head1.9and the driving curved bar1.3. The axis B is a driving curved bar stopping axis. The angle C is an included angle between the axis A and the axis B. Inflow of the water inlet hole1.91is controlled to generate the water pressure without bounce to push the brewing head109to move upwards, such that it is ensured that the brewing head1.9is positioned and maintained constantly in pressure, and therefore, solving a problem that the center axis of the driving curved bar1.3does not pass the axis A (or on axis A) when the driving curved bar swings and that the driving curved bar is rebounded to push the brewing head1.9to move upwards, leading to a result that the brewing chamber401cannot be sealed. The stopping contact dimension of the curved bar stopping portion1.51is at least a half of the swing portion1.33in length or is consistent with the dimension as the center axis of the driving curved bar1.3.

In order to guarantee that the limiting block1.5can play a stopping role, in the specific embodiment, the width of the curved bar stopping portion1.51contacted with the swing portion1.33on the limiting block1.5is at least a half of a width of the swing portion1.33.

It can be understood that the greater the width of the curved bar stopping portion1.51on the limiting block1.5is, the larger the area between the curved bar stopping portion and the swing portion1.33is and the greater the stopping force received by the swing portion1.33is. Thus, it is ensured that the brewing head1.9is stably positioned without moving upwards under the action of the water pressure.

In order to reduce bubbles generated when the coffee is brewed and improve the drinking taste of the user, in the specific embodiment, the brewing head1.9is provided with the ventilation pipe1.20penetrating through the axial direction of the brewing head1.9. A steam buoyancy valve1.30capable of floating along with hot water in the brewing cavity shell4is arranged below the ventilation pipe1.20. When water vapor in the brewing cavity shell4is discharged from the ventilation pipe1.20, the steam buoyancy valve1.30floats upwards along with the hot water in the brewing cavity shell4to block the ventilation pipe1.20.

Specifically, the brewing head1.9moves downward to be movably and sealedly connected to the brewing chamber401via the seal ring1.10. Water and water vapor enter the water inlet hole1.91, a part of water vapor is discharged via the ventilation pipe, and after the water vapor is discharged, the hot water pushes the steam buoyancy valve1.30to move upwards to close the front end inlet of the ventilation pipe1.20. The ventilation pipe1.20is characterized in exhausting gas and draining water. The hot water enters the brewing chamber401via the dividing cover to brew with the coffee powder. The coffee solution flows out along the coffee outlet hole302in the pressure sealing water outlet element3.3. The coffee seal ring4.6on the brewing cavity shell4is sealedly connected to the discharge push rod3, and the coffee outlet4.72is a unique outlet of the coffee solution. The brewing head1.9moves upwards to relieve sealed connection with the brewing chamber401and the steam buoyancy valve1.30moves downwards to intake air, and the brewing head1.9does not generate a suction force negative pressure to move upwards to be separated from the brewing cavity opening402.

On a basis of the specific embodiment, the pressure plate4.3is the arc-shaped pressure plate opened facing the direction of the discharge push rod3, and the surface of the arc-shaped pressure plate is provided with several pressure plate rotating shafts4.5for contacting with the brewing head1.9.

It can be understood that the pressure plate4.3is configured to the arc-shaped pressure plate for the following objectives. On the one hand, the pressure plate is matched with the brewing cavity shell4in structure and in shape, and on the other hand, the arc-shaped pressure plate can be in contact with the brewing head1.9when rotating to different positions. The surface of the arc-shaped pressure plate is provided with several pressure plate rotating shafts4.5, and the pressure plate rotating shafts4.5can rotate to reduce the friction force between the pressure plate4.3and the brewing head1.9when pressure plate rotating shaft is in contact with the brewing head1.9, such that the service life is prolonged. Besides the pressure plate rotating shafts4.5, structural forms such as a rotating wheel capable of rotating can be further adopted.

In the specific embodiment, the filtering portion3.2is fixedly connected to the upper end surface of the groove490via the first buckling position, the screw or the strong pressure. The filtering portion3.2is fixed to filter the coffee grounds so as to prevent the filtering portion3.2from swaying or falling off under impact of a water flow.

It can be understood that as the discharge portion and the brewing head1.9are not fixedly connected to each other and the brewing head1.9only can push the discharge portion to move downwards and cannot drive the discharge portion to restore upwards to an original position. In order to solve the problem, in the specific embodiment, the pressure plate4.3is connected to the outer wall of the brewing cavity shell4via the elastic element so as to drive the pressure plate4.3which has discharged the grounds to restore to the original position.

When the brewing head1.9pushes the discharge element to move downwards, the elastic element is stretched, and when the brewing head1.9moves upwards to relieve contact with the pressure plate4.3, the elastic element drives the pressure plate4.3to restore to the original position under the action of the elastic restoring force, i.e., the discharge element is returned to the upper end surface of the groove490. The elastic element can be parts such as the reset spring4.4or a Z-type elastic piece.

When the filtering portion3.2is fixed to the upper end surface of the groove490via the bolt, the filtering portion3.2is provided with the first screw hole, the pressure sealing water outlet element3.3is provided with the second screw hole, and the upper end surface of the groove490is provided with the third screw hole. The filtering portion3.2and the pressure sealing water outlet element3.3are fixed to the upper end surface of the groove490via a bolt which penetrates through the first screw hole, the second screw hole and the third screw hole in sequence. It should be noted that, the filtering portion3.2isolates and filters the coffee grounds left after the coffee powder is dissolved, the filtering portion3.2presses the pressure sealing water outlet element3.3via the bolt to the upper end surface of the groove490, and when it is needed to replace the filtering portion3.2or the pressure sealing water outlet element3.3, it is convenient to detach the same.

In a specific embodiment with respect to the second power portion, the second power portion includes the second motor6arranged on the positioning bracket2.4and the liquid outlet pipe4.7in coupled transmission to the rotating shaft of the second motor6via the gear portion, and the liquid outlet pipe4.7is fixedly connected to the brewing cavity shell4and is arranged on the axis of the brewing cavity shell4.

Specifically, the brewing head1.9is provided with the ventilation pipe1.20, the seal ring1.10and the dividing cover. The longitudinal axis M of the brewing bracket2is provided with the upward linear channel2.6. The side portion of the linear channel2.6is provided with the feed opening2.7. The longitudinal axis M is perpendicularly or obliquely arranged. The transverse axis H of the brewing bracket2is provided with the positioning rotating hole2.8. The transverse axis H is horizontally or obliquely arranged. The transmission gear pipe2.3and the positioning rotating hole2.8are concentrically and coaxially arranged. The liquid outlet pipe4.7enters the first spigot2.13, the second spigot2.41and the third spigot2.42in sequence. The positioning bracket2.4and the brewing bracket2clamp and sleeve the transmission gear pipe2.3in the positioning rotating hole2.8of the brewing bracket2and the third spigot2.42of the positioning bracket2.4to be rotatably connected. The outer tooth4.71on the liquid outlet pipe4.7is in coupled connecting transmission with the inner positioning tooth2.31on the transmission gear2.30, and the transmission gear2.30is in coupled connection with the motor gear2.5of the second motor6.

Preferably, the main body of the discharge push rod3is fixedly connected to the pressure plate4.3, and the brewing cavity shell4rotates via the outer tooth4.71or the liquid outlet pipe4.7, such that the brewing cavity opening402is opened upwards or opened downwards. When the brewing cavity opening402is opened upwards, the brewing head1.9is sealedly connected to the brewing cavity opening, when the brewing cavity opening402is opened downwards and the pressure plate4.3moves upwards, the brewing head1.9presses downwards to push the pressure plate4.3to move downwards, the discharge push rod3moves downward to push the coffee grounds out of the brewing chamber401via the discharge element, the brewing head1.9is lifted out of the brewing chamber401, and the reset spring4.4is restored automatically to shrink the discharge push rod3and the discharge element to the bottom position of the brewing chamber401.

The embodiments in the description are described progressively. Each embodiment puts an emphasis on difference with other embodiments. It may be with reference to same or similar parts of the embodiments, i.e., detailed introduction can be made on the coffee brewer and the brewing cavity thereof provided by the present invention. Particular examples are used herein to explain the principle and embodiments of the present invention, and the above description of the embodiments is only used to help understanding the methods and core concept of the present invention. It should be noted that those skilled in the art further can make several improves and modifications on the present invention without departing from the principle of the present invention, and these improvements and modifications further come within the protection scope of claims of the present invention.