Anti-residue device, beverage preparation method and electric appliance

Abstract

The application belongs to the technical field of household appliances, and particularly relates to a residual prevention device, a beverage preparation method and an electric appliance. The residual prevention device comprises a brewing bin, a brewing piece and a brewing opening. The brewing bin is provided with a brewing chamber, the brewing chamber is provided with the brewing opening, the brewing piece is movably arranged through the brewing opening, the brewing piece moves back and forth relative to the brewing bin, and the brewing piece is provided with a first flow guide channel and a second flow guide channel which are both communicated with the brewing chamber. Flow guide pieces are both communicated with the first flow guide channel and the second flow guide channel to convey fluid. The application can discharge the retained fluid from the brewing bin, so as to avoid the problem that the quality of the fluid is reduced due to long-time retention of the fluid, and improve the user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a residual prevention device, a beverage preparation method, and an appliance. BACKGROUND

[0002] After the existing beverage preparation device prepares a beverage, a certain amount of fluid is retained in the flow guide between the brewing chamber and the beverage outlet. The retained fluid cannot be discharged from the beverage outlet or returned to the brewing chamber. When the next brewing cycle interval is too long, the retained fluid deteriorates due to long retention, affecting the user experience. SUMMARY

[0003] To solve the above technical problems, the present application provides a residual prevention device, a beverage preparation method, and an appliance to avoid the technical problem of fluid quality deterioration caused by long retention of fluid retained in the flow guide between the brewing chamber and the beverage outlet, affecting the user experience.

[0004] The technical solution of the present application is as follows:

[0005] In a first aspect, the present application provides a residual prevention device, which comprises: a brewing bin provided with a brewing chamber, the brewing chamber being provided with a brewing port; a brewing member movably passing through the brewing port, the brewing member moving back and forth relative to the brewing bin, the brewing member being provided with a first flow guide channel and a second flow guide channel both communicating with the brewing chamber; and a flow guide member communicating with the first flow guide channel and the second flow guide channel to transport fluid; wherein, when the brewing member moves in the direction of the brewing bin, the first flow guide channel is opened and the second flow guide channel is closed to guide the fluid in the brewing bin out of the first flow guide channel to the flow guide member; when the brewing member moves away from the brewing bin, the first flow guide channel is closed and the second flow guide channel is opened to guide the residual fluid in the first flow guide channel and the flow guide member into the brewing bin through the opened second flow guide channel, and then discharge through the brewing port.

[0006] The anti-residual device provided in the application controls the brewing member and the brewing bin to move close to each other in actual use, the first flow guide channel is opened, the second flow guide channel is closed, the fluid in the brewing bin is guided to the corresponding equipment through the first flow guide channel and the flow guide member to prepare the beverage; after the beverage is prepared, the brewing member and the brewing bin are controlled to move away from each other, a negative pressure is formed in the brewing bin, the first flow guide channel is closed, and the second flow guide channel is opened to guide the fluid in the first flow guide channel and the flow guide member into the brewing bin through the opened second flow guide channel and discharge the fluid through the brewing opening of the brewing bin, so that the fluid remaining in the first flow guide channel and the flow guide member can be discharged from the brewing bin, thereby avoiding the problem that the fluid quality is reduced due to long-term retention of the fluid, and improving the user experience.

[0007] In some embodiments, a first switching member is arranged in the first flow guide channel to control the opening and closing of the first flow guide channel; a second switching member is arranged in the second flow guide channel to control the opening and closing of the second flow guide channel; the first switching member and the second switching member are pressure control valves.

[0008] In some embodiments, the first switching member comprises: a first valve core movably arranged in the first flow guide channel, a head portion of the first valve core facing the brewing bin, the head portion of the first valve core blocking the first flow guide channel, a body of the first valve core being gap-fitted in the first flow guide channel, and a projection of the head portion of the first valve core falling within the body of the first valve core; and a first elastic member having two ends connected to a back portion of the first valve core and an inner wall of the first flow guide channel, respectively. Under the condition that the brewing member and the brewing bin move close to each other, the fluid in the brewing bin is compressed and flows into the first flow guide channel to act on the head portion of the first valve core, so that the first elastic member is compressed, thereby enabling the fluid to flow out through the gap between the body of the first valve core and the first flow guide channel to open the first flow guide channel; conversely, when the brewing member and the brewing bin move away from each other, a negative pressure is generated in the brewing bin to force the first elastic member to drive the first valve core to return to the original position to close the first flow guide channel.

[0009] In some embodiments, the first flow guide channel comprises: a first liquid inlet channel and a first liquid expansion channel arranged along the moving direction of the brewing member, the brewing chamber, the first liquid inlet channel and the first liquid expansion channel being sequentially communicated, the cross-sectional area of the first liquid expansion channel gradually increasing along the direction away from the brewing chamber, and the head portion of the first valve core being movably fitted in the first liquid expansion channel.

[0010] In some embodiments, the second switching member comprises: a second valve core movably arranged in the second flow channel, a head of the second valve core facing away from the brewing chamber, the head of the second valve core blocking the second flow channel, the second valve core having a body movably arranged in the second flow channel, a projection of the head of the second valve core falling within the body of the second valve core; and a second elastic member having two ends respectively connected to the back of the second valve core and the inner wall of the second flow channel. When the brewing member and the brewing chamber are moved close to each other, the fluid in the brewing chamber is compressed and flows into the second flow channel, acting on the back of the second valve core, the head of the second valve core blocks the second flow channel, so that the fluid can only flow out through the first flow channel, at the same time, the second elastic member is forced to be stretched to close the second flow channel; conversely, when the brewing member and the brewing chamber are moved away from each other, due to the negative pressure generated in the brewing chamber, the second elastic member is forced to return to its original position, and the second elastic member drives the second valve core to move to open the second flow channel, so as to guide the fluid in the flow guide member to flow into the brewing chamber through the opened second flow channel, and then to flow out through the brewing opening of the brewing chamber.

[0011] In some embodiments, the second flow channel comprises: a second liquid inlet channel and a second liquid expansion channel arranged along the moving direction of the brewing member, the second liquid inlet channel, the second liquid expansion channel and the brewing chamber being sequentially communicated, a cross-sectional area of the second liquid expansion channel gradually increasing along the direction close to the brewing chamber, and the head of the second valve core movably arranged in the second liquid expansion channel.

[0012] In some embodiments, the anti-residue device further comprises that the flow guide member comprises: a main pipe provided with a liquid inlet opening, a first branch pipe and a second branch pipe connected in parallel to the main pipe, the first branch pipe being communicated with the first flow channel, and the second branch pipe being communicated with the second flow channel.

[0013] In some embodiments, the head of the brewing member is provided with a filter opening, and the brewing opening is provided with a filter screen.

[0014] In some embodiments, the anti-residue device further comprises: a piston member movably arranged in the brewing chamber for receiving the residual fluid in the first flow channel and the flow guide member and guiding the residual fluid to flow out through the brewing opening.

[0015] In a second aspect, the application further provides a beverage preparation method based on the anti-residue device, the beverage preparation method comprising:

[0016] putting the brewing material into the brewing chamber of the brewing chamber;

[0017] controlling the brewing bin and the brewing member to move close to each other until the brewing member closes the brewing opening of the brewing bin;

[0018] fluids enter the brewing chamber through the guide member;

[0019] controlling the piston member to ascend to compress the fluids and the brewing material on the piston member to form a beverage, and to open the first guide passage to guide the beverage through the opened first guide passage to the corresponding device;

[0020] controlling the piston member to descend to generate a negative pressure in the brewing bin to close the first guide passage, open the second guide passage, and the residual beverage falls on the piston member through the opened second guide passage;

[0021] controlling the brewing bin and the brewing member to move away from each other until the brewing opening of the brewing bin is opened;

[0022] controlling the piston member to ascend to the top of the brewing bin, and the beverage is discharged from the brewing opening of the brewing bin.

[0023] The beverage preparation method provided by the present application can discharge the fluids retained in the guide member from the brewing bin, thereby avoiding the problem of quality degradation of the fluids due to long retention, and improving the user experience.

[0024] In some embodiments, the controlling the brewing bin and the brewing member to move close to each other specifically includes: controlling the brewing bin to move towards the brewing member, or / and, controlling the brewing member to move towards the brewing bin.

[0025] In some embodiments, the controlling the brewing bin and the brewing member to move away from each other specifically includes:

[0026] controlling the brewing bin to move away from the brewing member, or / and, controlling the brewing member to move away from the brewing bin.

[0027] In a third aspect, the present application further provides an electric appliance device comprising the anti-residue device.

[0028] The electric appliance device with the anti-residue device can discharge the fluids retained in the guide member from the brewing bin, thereby avoiding the problem of quality degradation of the fluids due to long retention, and improving the user experience.

[0029] In some embodiments, the electric appliance device is a fully automatic coffee machine. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0031] In the drawings:

[0032] Figure 1 A cross-sectional schematic view of the anti-residue device in one or more embodiments of the present application is shown;

[0033] Figure 2 An exploded schematic view of Figure 1 is shown;

[0034] Figure 3 A structural schematic view of the brewing member in Figure 1 is shown;

[0035] Figure 4 A top view schematic view of Figure 3 is shown;

[0036] Figure 5 An A-A cross-sectional schematic view of Figure 3 is shown;

[0037] Figure 6 A structural schematic view of the base in Figure 3 is shown;

[0038] Figure 7 A structural schematic view of another view of Figure 6 is shown;

[0039] Figure 8 A structural schematic view of the flow guide member in Figure 3 is shown;

[0040] Figure 9 A flow schematic view of the beverage preparation method based on the anti-residue device is shown.

[0041] Reference signs:

[0042] Brewing bin-100, brewing chamber-101, brewing port-102;

[0043] Brewing member-200, filtering port-201, filtering screen-202, base-203, first through hole-204, second through hole-205, first flow guide column-206, first flow guide section-207, second flow guide section-208, third flow guide section-209, second flow guide column-210, fourth flow guide section-211, fifth flow guide section-212, lapping table-213, annular groove-214, sealing member-215;

[0044] First flow guide channel-300, first liquid inlet channel-301, first liquid expansion channel-302;

[0045] Second flow guide channel-400, second liquid inlet channel-401, second liquid expansion channel-402;

[0046] Flow guide-500, main pipe-501, first branch pipe-502, second branch pipe-503, joint-504, infusion port-505;

[0047] First switching member-600, first valve core-601, first elastic member-602, first valve seat-603, first positioning column-604;

[0048] Second switching member-700, second valve core-701, second elastic member-702, second valve seat-703, second positioning column-704;

[0049] Piston member-800. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0051] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0052] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0053] The present application will be described below in conjunction with the drawings and with reference to specific embodiments:

[0054] In the related art, a beverage preparation device, especially a pressure coffee machine, usually puts coffee beans, coffee powder or coffee powder packs into a brewing chamber of the coffee preparation machine, and injects fluid at a set temperature and a set pressure into the brewing chamber, and stops supplying when a set amount of coffee beverage is extracted. Then the brewing chamber is opened automatically or manually, and the residue in the brewing chamber is discharged into the next brewing cycle.

[0055] The beverage preparation device on the market retains a certain amount of coffee liquid between the brewing chamber and the flow guide piece after the beverage brewing is completed. The retained coffee liquid cannot be discharged from the beverage outlet or returned to the brewing chamber, and when the next brewing cycle interval is too long, the temperature of the retained coffee liquid decreases, the flavor is lost or even deteriorated, and the retained coffee liquid and fresh coffee liquid are discharged into the cup at the same time when brewing the next beverage, resulting in that the temperature and quality of the whole cup of coffee beverage cannot meet the requirements, resulting in the quality of the coffee liquid being reduced, and the user experience being affected.

[0056] The conventional solution is to increase the waiting time for the next beverage brewing to evaporate the coffee liquid in the flow guide piece to reduce the influence of the retained coffee liquid on the beverage as much as possible, but this will affect the preparation efficiency of the beverage; or, flush the flow guide piece to remove the retained coffee liquid in the flow guide piece, but there is still flushing water in the flow guide piece after flushing, which will still affect the quality of the beverage, and increase the unnecessary operation, and also reduce the preparation efficiency of the beverage.

[0057] Based on the above technical problems, the embodiments of the present application provide a residual prevention device, a beverage preparation method and an electric appliance to avoid the technical problem of quality degradation of the fluid retained in the flow guide piece between the brewing chamber and the beverage outlet for a long time, affecting the user experience.

[0058] Figure 1 A cross-sectional view of a residual prevention device in one or more embodiments of the present application is shown, Figure 2 An exploded view of Figure 1 is shown. In combination with Figure 1 and Figure 2The residual prevention device comprises a brewing bin 100, a brewing piece 200 and a fluid guide piece 500, wherein the brewing bin 100 is provided with a brewing chamber 101, the brewing chamber 101 is provided with a brewing opening 102, the brewing piece 200 is movable through the brewing opening 102, the brewing piece 200 is movable relative to the brewing bin 100, the brewing piece 200 is provided with a first fluid guide channel 300 and a second fluid guide channel 400, one end of the first fluid guide channel 300 and one end of the second fluid guide channel 400 are communicated with the brewing chamber 101, the other end of the first fluid guide channel 300 and the other end of the second fluid guide channel 400 are communicated with the fluid guide piece 500, under the condition that the brewing piece 200 and the brewing bin 100 are moved close to each other, the first fluid guide channel 300 is opened and the second fluid guide channel 400 is closed, so as to guide the fluid in the brewing bin 100 out through the first fluid guide channel 300; under the condition that the brewing piece 200 and the brewing bin 100 are moved away from each other, the first fluid guide channel 300 is closed and the second fluid guide channel 400 is opened, so as to guide the fluid in the first fluid guide channel 300 into the brewing bin 100 through the opened second fluid guide channel 400, and then the fluid is discharged through the brewing opening 102.

[0059] In actual use, after the fluid brewing in the brewing bin 100 is completed, the brewing piece 200 and the brewing bin 100 are controlled to move close to each other, the first fluid guide channel 300 is opened and the second fluid guide channel 400 is closed, the fluid in the brewing bin 100 is guided to the corresponding equipment through the first fluid guide channel 300 and the fluid guide piece 500, so as to prepare the beverage; after the fluid in the brewing bin 100 is guided out to a set amount, the brewing piece 200 and the brewing bin 100 are controlled to move away from each other, a negative pressure is formed in the brewing bin 100, the first fluid guide channel 300 is closed and the second fluid guide channel 400 is opened, so as to guide the fluid in the first fluid guide channel 300 and the fluid guide piece 500 into the brewing bin 100 through the opened second fluid guide channel 400, and then the fluid is discharged through the brewing opening 102 of the brewing bin 100, so that the fluid remaining in the fluid guide piece 500 can be discharged from the brewing bin 100, thereby avoiding the problem that the fluid quality is reduced due to long-time remaining of the fluid, and improving the user experience.

[0060] In combination with Figure 1 and Figure 2 , the brewing opening 102 can be arranged at the top of the brewing chamber 101 of the brewing bin 100, the brewing piece 200 and the brewing bin 100 can be controlled to move away from each other by an external force or some driving mechanism, after the brewing piece 200 completely separates from the brewing bin 100, the brewing opening 102 is opened, and then the brewing material required for preparing the beverage can be injected into the brewing chamber 101 of the brewing bin 100 through the opened brewing opening 102, after the brewing material is injected, the brewing piece 200 and the brewing bin 100 are driven to move close to each other, so that the brewing opening 102 can be closed, and the brewing and preparation of the fluid can be performed.

[0061] Figure 3 a structural diagram of the brewing element in Figure 1 , Figure 4 a top view diagram of the brewing element in Figure 3 , Figure 5 a cross-sectional view diagram of the brewing element in Figure 3 , Figure 6 a structural diagram of the base in Figure 3 , Figure 7 a structural diagram of the base in Figure 6 from another perspective. In combination with Figures 1-7 , the overall shape of the brewing element 200 is a column that matches the brewing chamber 101, and a sealing element 215 is arranged between the peripheral surface of the brewing element 200 and the side wall of the brewing chamber 101 to ensure the sealing effect between the two when the brewing element 200 is in the brewing chamber 101, so as to prevent fluid from overflowing between the brewing element 200 and the brewing chamber 101.

[0062] In combination with Figures 1-6 , since the brewing element 200 moves back and forth, the peripheral surface of the brewing element 200 can be provided with an annular groove 214, and the sealing element 215 is arranged in the annular groove 214. The sealing element 215 has a sealing portion that protrudes out of the annular groove 214. When the brewing element 200 moves back and forth relative to the brewing chamber 100, the sealing portion of the sealing element 215 will be compressed, thereby ensuring the sealing between the brewing element 200 and the brewing chamber 101.

[0063] In combination with Figures 1-6 , the head of the brewing element 200 is provided with a filter port 201 through which fluid can enter and exit. A filter screen 202 can be arranged in the filter port 201 to improve the extraction quality of the fluid.

[0064] In combination with Figure 6 , the head of the brewing element 200 can be provided with a base 203, and the filter port 201 is arranged on the end surface of the base 203 facing the brewing chamber 100. The filter screen 202 is mounted on the base 203. A first through hole 204 that communicates with the first flow guide channel 300 and a second through hole 205 that communicates with the first flow guide channel 300 can be arranged on the base 203 to realize the flow and circulation of the fluid.

[0065] In combination with Figures 1-7 , the outer peripheral surface of the base 203 can be provided with an overlapping table 213. When the brewing element 200 moves into the brewing chamber 100, the overlapping table 213 will abut against the top of the brewing chamber 100 to limit the movement position of the brewing element 200 and improve the safety of the device during operation.

[0066] In combination with Figure 1 , Figure 2 and Figure 5The first flow channel 300 is provided with a first switching member 600 for controlling the opening and closing of the first flow channel 300. The first switching member 600 comprises a first valve core 601 and a first elastic member 602. The first valve core 601 is movably arranged in the first flow channel 300, and the head of the first valve core 601 faces the brewing chamber 100. The head of the first valve core 601 blocks the first flow channel 300. The first valve core 601 has a body which is arranged in the first flow channel 300 in a clearance fit. The projection of the head of the first valve core 601 falls within the body of the first valve core 601. The two ends of the first elastic member 602 are connected to the back of the first valve core 601 and the inner wall of the first flow channel 300 respectively. When the brewing member 200 and the brewing chamber 100 move close to each other, the fluid in the brewing chamber 100 is compressed and flows into the first flow channel 300, and acts on the head of the first valve core 601, forcing the first elastic member 602 to be compressed, so that the fluid can flow out through the clearance between the body of the first valve core 601 and the first flow channel 300, to open the first flow channel 300. Conversely, when the brewing member 200 and the brewing chamber 100 move away from each other, a negative pressure is generated in the brewing chamber 100, forcing the first elastic member 602 to drive the first valve core 601 to return to the original position, to close the first flow channel 300.

[0067] In combination with Figure 1 , Figure 2 and Figure 5 , the first flow channel 300 comprises a first liquid inlet channel 301 and a first liquid expansion channel 302 arranged along the moving direction of the brewing member 200. The brewing chamber 101, the first liquid inlet channel 301 and the first liquid expansion channel 302 are sequentially connected. The cross-sectional area of the first liquid expansion channel 302 increases in the direction away from the brewing chamber 101. The head of the first valve core 601 is movably arranged in the first liquid expansion channel 302. In the initial state, under the support of the first elastic member 602, the head of the first valve core 601 is arranged in the first liquid expansion channel 302, to close the first flow channel 300. When the brewing member 200 and the brewing chamber 100 move close to each other, the fluid in the brewing chamber 100 is compressed and flows into the first liquid inlet channel 301 of the first valve seat 603 through the first through hole 204, and forces the head of the first valve core 601 in the first liquid expansion channel 302 to move away from the brewing chamber 100. Since the cross-sectional area of the first liquid expansion channel 302 increases in the direction away from the brewing chamber 101, the fluid can flow into the space between the head of the first valve core 601 and the first liquid expansion channel 302, and then flow out through the clearance between the body of the first valve core 601 and the first flow channel 300.

[0068] In combination with Figure 1 , Figure 2 and Figure 5The first switching member 600 further comprises a first valve seat 603, and the first liquid inlet channel 301 and the first liquid expansion channel 302 are arranged on the first valve seat 603 in the moving direction of the brewing member 200. The brewing chamber 101 can be sequentially communicated with the first through hole 204, the first liquid inlet channel 301 and the first liquid expansion channel 302 to realize the delivery of the fluid.

[0069] Specifically, in combination with Figure 1 , Figure 2 , Figure 5 and Figure 7 , the first flow guide column 206 can be arranged on the top of the base 203 and can be axially penetrated to form the first flow guide channel 300. A segment of the first flow guide channel 300 close to the brewing bin 100 can be set as the first flow guide segment 207, a segment of the first flow guide channel 300 in the middle can be set as the second flow guide segment 208, and a segment of the first flow guide channel 300 far away from the brewing bin 100 can be set as the third flow guide segment 209. The first flow guide segment 207, the second flow guide segment 208 and the third flow guide segment 209 are coaxially and sequentially communicated, the diameters of the first flow guide segment 207, the second flow guide segment 208 and the third flow guide segment 209 are sequentially reduced, the first valve seat 603 is fixedly arranged at the bottom of the first flow guide segment 207, the first valve seat 603 and the top of the first flow guide segment 207 have a distance, the head of the first valve core 601 can be arc-shaped, the circumference of the first valve core 601 is in clearance fit with the first flow guide segment 207, the back of the first valve core 601 can be provided with the first positioning column 604, the first positioning column 604 can be movably penetrated through the first flow guide segment 207 and enter the second flow guide segment 208, and the first elastic member 602 can be a spring, the two ends of the first elastic member 602 are connected or abut against the back of the first valve core 601 and the top of the second flow guide segment 208 respectively, and the first elastic member 602 is sleeved on the first positioning column 604 to provide guidance for the compression reset of the first elastic member 602. The fluid in the brewing bin 100 can sequentially flow out through the first flow guide segment 207, the second flow guide segment 208 and the third flow guide segment 209.

[0070] In other embodiments, the head of the first valve core 601 can also be conical or frustoconical, which is not limited herein. In addition, the outer diameter of the third flow guide segment 209 can be smaller than the outer diameter of the second flow guide segment 208, which can facilitate the assembly of the first elastic member 602 and the flow guide member 500. For the assembly of the flow guide member 500, reference can be made to the description below.

[0071] In combination with Figure 1 , Figure 2 and Figure 5The second switching member 700 is arranged in the second flow channel 400 to control the opening and closing of the second flow channel 400. The second switching member 700 comprises a second valve core 701 and a second elastic member 702. The second valve core 701 is movably arranged in the second flow channel 400. The head of the second valve core 701 faces away from the brewing chamber 100. The head of the second valve core 701 blocks the second flow channel 400. The second valve core 701 has a body which is arranged in the second flow channel 400 in a clearance fit. The projection of the head of the second valve core 701 falls within the body of the second valve core 701. The two ends of the second elastic member 702 are respectively connected to the back of the second valve core 701 and the inner wall of the second flow channel 400. When the brewing member 200 moves away from the brewing chamber 100, the fluid in the brewing chamber 100 is compressed and flows into the second flow channel 400 to act on the back of the second valve core 701. The head of the second valve core 701 blocks the second flow channel 400, so that the fluid can only flow out through the first flow channel 300. At the same time, the second elastic member 702 is forced to be stretched to close the second flow channel 400. Conversely, when the brewing member 200 moves towards the brewing chamber 100, a negative pressure is generated in the brewing chamber 100, which forces the second elastic member 702 to return to its original position. The second elastic member 702 drives the second valve core 701 to move to open the second flow channel 400, so that the fluid in the flow guide member 500 is introduced into the brewing chamber 100 through the opened second flow channel 400, and is discharged through the brewing opening 102 of the brewing chamber 100.

[0072] In combination with Figure 1 , Figure 2 and Figure 5The second flow guide 500 comprises a second liquid inlet channel 401 and a second liquid expansion channel 402 arranged in sequence along the moving direction of the brewing member 200. The second liquid inlet channel 401 and the second liquid expansion channel 402 are communicated in sequence through the second through hole 205 and the brewing chamber 101. The cross-sectional area of the second liquid expansion channel 402 increases in sequence along the direction towards the brewing chamber 101. The head of the second valve core 701 is movably arranged in the second liquid expansion channel 402. When the brewing member 200 and the brewing bin 100 are close to each other, the fluid in the brewing bin 100 is compressed and flows into the second flow guide channel 400, and acts on the back of the second valve core 701. The head of the second valve core 701 is located in the first liquid expansion channel 302 to block the second flow guide channel 400, so that the fluid can only flow out through the first flow guide channel 300. At the same time, the second elastic member 702 is forced to be stretched to close the second flow guide channel 400. Conversely, when the brewing member 200 and the brewing bin 100 are away from each other, due to the negative pressure generated in the brewing bin 100, the second elastic member 702 is forced to return to its original position. The second elastic member 702 drives the second valve core 701 in the second liquid expansion channel 402 to move towards the brewing bin 100 to open the second flow guide channel 400, so as to guide the fluid in the flow guide member 500 to the brewing bin 100 through the opened second flow guide channel 400, and then discharge the fluid through the brewing opening 102 of the brewing bin 100.

[0073] Specifically, in combination with Figure 1 , Figure 2 , Figure 5 and Figure 7A second flow guide column 210 can be arranged on the top of the base 203, and the second flow guide column 210 can be penetrated in the axial direction to form a second flow guide channel 400. A section of the second flow guide channel 400 close to the brewing bin 100 can be set as a fourth flow guide section 211, and a section of the second flow guide channel 400 away from the brewing bin 100 can be set as a fifth flow guide section 212. The fourth flow guide section 211 and the fifth flow guide section 212 are coaxial and sequentially communicated, the diameters of the fourth flow guide section 211 and the fifth flow guide section 212 are sequentially reduced, a second valve seat 703 can be arranged at the bottom of the fourth flow guide section 211, the second valve seat 703 and the top of the fourth flow guide section 211 have a distance, the second valve seat 703 is provided with a third through hole penetrating through, the brewing chamber 101 is communicated with the fourth flow guide section 211 through the second through hole 205 and the third through hole, the third through hole is a stepped hole, the bottom end of the second elastic member 702 is connected in the stepped hole, the top end of the second elastic member 702 is connected to the back of the second valve core 701, the fifth flow guide section 212 can be the second liquid inlet channel 401 described above, the second liquid expansion channel 402 is arranged at the transition of the fifth flow guide section 212 and the fourth flow guide section 211, the head of the second valve core 701 can be arc-shaped, the second valve core 701 is in clearance fit with the fourth flow guide section 211, the back of the second valve core 701 can be provided with a second positioning column 704, the second positioning column 704 is movably arranged in the fourth flow guide section 211, the second elastic member 702 can be a spring, and the second elastic member 702 is sleeved on the second positioning column 704 to provide guidance for compression reset of the second elastic member 702. The fluid in the flow guide member 500 can sequentially flow through the fifth flow guide section 211, the fourth flow guide section 211, the third through hole and the second through hole 205, and then flow into the brewing bin 100.

[0074] In other embodiments, the head of the first valve core 601 can also be conical or frustoconical, which is not limited herein. In addition, the outer diameter of the fifth flow guide section 212 can be smaller than the outer diameter of the fourth flow guide section 211, which can facilitate the assembly of the flow guide member 500. For the assembly of the flow guide member 500, reference can be made to the description below.

[0075] As known from the above, the first switching member 600 and the second switching member 700 are both pressure control valves, i.e., valves controlled by pressure. In other embodiments, the second switching member and the second switching member can also be other types of valves, for example, the switching member has a certain elasticity on the periphery, and under the action of pressure, the elasticity of the switching member is completely deformed, so that the channel is opened.

[0076] In combination with Figure 1 , Figure 2 and Figure 5 , the residual prevention device further comprises a flow guide member 500. Figure 8 The structure of the flow guide member in Figure 3 is shown, and in combination with Figure 1 , Figure 2 ,Figure 5 and Figure 8 The flow guide 500 comprises a main pipe 501, a first branch pipe 502 and a second branch pipe 503, the main pipe 501 is provided with a liquid outlet 505, the first branch pipe 502 and the second branch pipe 503 are connected in parallel to the main pipe 501, the first branch pipe 502 is communicated with the first flow guide channel 300, and the second branch pipe is communicated with the second flow guide channel 400. In actual implementation, after brewing of the fluid in the brewing chamber 100 is completed, the brewing member 200 is controlled to move towards the brewing chamber 100, the first flow guide channel 300 is controlled to be opened, the second flow guide channel 400 is controlled to be closed, the fluid in the brewing chamber 100 is guided to the main pipe 501 through the first flow guide channel 300 and the first branch pipe 502, and then is guided to the corresponding equipment through the liquid outlet 505 of the main pipe 501 to prepare the beverage; after a set amount of the fluid in the brewing chamber 100 is guided out, the brewing member 200 is controlled to move away from the brewing chamber 100, a negative pressure is formed in the brewing chamber 100, the first flow guide channel 300 is controlled to be closed, and the second flow guide channel 400 is controlled to be opened, so that the fluid in the main pipe 501 and the first flow guide channel 300 is guided to the brewing chamber 100 through the second branch pipe 503 and the opened second flow guide channel 400, and then is discharged through the brewing opening 102 of the brewing chamber 100, thereby the fluid remaining in the flow guide 500 can be discharged from the brewing chamber 100, and the problem that the quality of the fluid is reduced due to long-time remaining of the fluid can be avoided, so as to improve the user experience.

[0077] In the embodiments of the present application, the first branch pipe 502 and the second branch pipe 503 can be integrally formed with the main pipe 501, the first branch pipe 502 is connected to the third flow guide section 209 of the first flow guide column 206 through a joint 504, and the second branch pipe 503 is connected to the fourth flow guide section 211 of the second flow guide column 210 through another joint 504. In other embodiments, the first branch pipe 502 can be fixed on the outer peripheral surface of the third flow guide section 209 of the first flow guide column 206 through threads, the second branch pipe 503 can be fixed on the outer peripheral surface of the fourth flow guide section 211 of the second flow guide column 210 through threads, and then the main pipe 501 is inserted on the first branch pipe 502 and the second branch pipe 503, which is not limited herein.

[0078] In the related art, the brewing opening 102 is arranged at the bottom of the brewing chamber 100 to discharge the remaining fluid residue, but since the brewing opening 102 needs to be closed when the fluid is brewed in the brewing chamber 100, a device for controlling opening and closing of the brewing opening 102 needs to be arranged to adapt to different use conditions, which causes an increase in cost.

[0079] Based on this, in combination with Figure 1 and Figure 2The anti-residue device also comprises a piston 800 movably arranged in the brewing chamber 101 to receive the fluid.

[0080] Figure 9 A flowchart of the beverage preparation method based on the anti-residue device is shown. In combination with the anti-residue device, the beverage preparation method comprises the following steps. Figure 9 The beverage preparation method comprises the following steps.

[0081] S1: Pour the brewing material into the brewing chamber 101 of the brewing bin 100: under the condition that the brewing bin 100 and the brewing member 200 are completely separated, the brewing opening 102 at the top of the brewing bin 100 is opened, and the brewing material, such as coffee beans, is poured into the brewing chamber 101 of the brewing bin 100 through the opened brewing opening 102, and the brewing material falls to the top of the piston 800;

[0082] S2: Control the brewing bin 100 and the brewing member 200 to move close to each other until the brewing member 200 closes the brewing opening 102 of the brewing bin 100: in actual implementation, the brewing bin 100 can be controlled to move towards the brewing member 200, or the brewing member 200 can be controlled to move towards the brewing bin 100, or both the brewing bin 100 and the brewing member 200 can be controlled to move to make the brewing bin 100 and the brewing member 200 move close to each other.

[0083] S3: Inject the fluid into the brewing chamber 102: due to the movement of the brewing bin 100 and the brewing member 200 close to each other, the air in the brewing bin 100 is compressed, and the first flow guide channel 300 is at least partially opened, so that the fluid can be injected into the brewing bin 100 through the flow guide member 500. In other embodiments, a dedicated conveying pipeline can also be provided to inject the fluid into the brewing bin 100, which is not limited herein.

[0084] S4: Control the piston 800 to rise to compress the fluid and the brewing material on the piston 800 to form the beverage, and open the first flow guide channel 300 to guide the beverage through the opened first flow guide channel 300 to the corresponding equipment.

[0085] S5: Control the piston 800 to descend, and the piston 800 can descend to the bottom of the brewing bin 100 to generate negative pressure in the brewing bin 100 to close the first flow guide channel 300 and open the second flow guide channel 400, so that the residual beverage falls onto the piston 800 through the opened second flow guide channel 400.

[0086] S6 controls the brewing bin 100 and the brewing piece 200 to move away from each other until the brewing opening 102 of the brewing bin 100 is opened: in actual implementation, the brewing bin 100 can be controlled to move away from the brewing piece 200, or the brewing piece 200 can be controlled to move away from the brewing bin 100, or the brewing bin 100 and the brewing piece 200 can be controlled to move away from each other so that the brewing bin 100 and the brewing piece 200 move away from each other;

[0087] S7 controls the piston piece 800 to rise to the top of the brewing bin 100, and the fluid is discharged from the brewing opening 102 of the brewing bin 100.

[0088] In the above scheme, the rising of the piston piece 800 can also extract the fluid to generate a beverage, and the separate opening of the residue discharge opening and the device for controlling the opening and closing of the residue discharge opening can be avoided, thereby reducing the cost and having good practicability.

[0089] On the other hand, the application also provides an electric appliance device, which comprises the above anti-residue device.

[0090] The electric appliance device with the above anti-residue device can discharge the fluid remaining in the flow guide piece 500 from the brewing bin 100, so that the remaining fluid is recycled in time, the fluid mixed with fresh fluid due to the decrease of the temperature in the next brewing cycle is avoided, the temperature and flavor of the fresh fluid are ensured, the problem that the quality of the fluid is reduced due to the long-time remaining of the fluid is avoided, and the user experience is improved.

[0091] The electric appliance device can be the above full-automatic coffee machine, or other types of beverage devices, such as various types of beverage devices, without limitation.

[0092] Specifically, a control panel can be arranged on the electric appliance device, and the control panel can be arranged with instructions corresponding to the above anti-residue mode. When the user presses or contacts the instructions corresponding to the control panel, the anti-residue mode of the electric appliance device can be controlled to run. Alternatively, a sensor can be arranged in the electric appliance device, and the user can control various instructions through remote control or the like to realize the running of the anti-residue mode of the electric appliance device, and the application does not make specific limitation on this.

[0093] In the application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific situation.

[0094] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0095] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed in the present application.

[0096] In the description of the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the first feature above and oblique above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes the first feature below and oblique below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0097] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0098] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those of ordinary skill in the art once they have the benefit of the foregoing description. Therefore, the appended claims are intended to encompass within their scope all such variations and modifications as are within the scope of the application. It is to be understood that the application is not limited to particular embodiments described, and is intended to include all modifications and alterations from this description.

[0099] It is apparent that many modifications and variations of this application can be effected although only a few have been chosen for purposes of disclosure. Thus, it is intended to embrace all alternatives and modifications of the described embodiments.

Claims

1. A residue prevention device, characterized by, The anti-residue device comprises: a brewing bin provided with a brewing chamber, the brewing chamber being provided with a brewing opening; a brewing member movably passing through the brewing opening, the brewing member moving back and forth relative to the brewing bin, the brewing member being provided with a first flow guide channel and a second flow guide channel, both of which are communicated with the brewing chamber; a flow guide member communicated with the first flow guide channel and the second flow guide channel to convey fluid; wherein, under the condition that the brewing member and the brewing bin move close to each other, the first flow guide channel is opened and the second flow guide channel is closed to lead the fluid in the brewing bin out of the first flow guide channel to the flow guide member; under the condition that the brewing member and the brewing bin move away from each other, the first flow guide channel is closed and the second flow guide channel is opened to lead the residual fluid in the first flow guide channel and the flow guide member into the brewing bin through the opened second flow guide channel and then discharge the fluid through the brewing opening; the first flow guide channel is provided with a first switching member to control the opening and closing of the first flow guide channel; the second flow guide channel is provided with a second switching member to control the opening and closing of the second flow guide channel; the first switching member and the second switching member are pressure control valves.

2. The anti-residue device of claim 1, wherein, The first switching member comprises: a first valve core movably arranged in the first flow guide channel, a head of the first valve core facing the brewing bin, the head of the first valve core blocking the first flow guide channel, a periphery of the first valve core being gap-fittingly arranged in the first flow guide channel, a projection of the head of the first valve core falling within the periphery of the first valve core; a first elastic member having two ends connected with a back of the first valve core and an inner wall of the first flow guide channel respectively.

3. The anti-residue device of claim 2, wherein, The first flow guide channel comprises: a first liquid inlet channel and a first liquid expansion channel arranged along a moving direction of the brewing member, the brewing chamber, the first liquid inlet channel and the first liquid expansion channel being communicated in sequence, a cross-sectional area of the first liquid expansion channel increasing in sequence along a direction away from the brewing chamber, the head of the first valve core being movably arranged in the first liquid expansion channel.

4. The anti-residue device of any of claims 2-3, wherein, The second switching member comprises: a second valve core movably arranged in the second flow guide channel, a head of the second valve core facing away from the brewing bin, the head of the second valve core blocking the second flow guide channel, a periphery of the second valve core being gap-fittingly arranged in the second flow guide channel, a projection of the head of the second valve core falling within the periphery of the second valve core; a second elastic member having two ends connected with a back of the first valve core and an inner wall of the first flow guide channel respectively.

5. The anti-residue device of claim 4, wherein, The second flow guide channel comprises: a second liquid inlet channel and a second liquid expansion channel arranged along a moving direction of the brewing member, the second liquid inlet channel, the second liquid expansion channel and the brewing chamber being communicated in sequence, a cross-sectional area of the second liquid expansion channel increasing in sequence along a direction close to the brewing chamber, the head of the second valve core being movably arranged in the second liquid expansion channel.

6. The anti-residue device of any of claims 1-3 and 5, wherein, The flow guide member comprises: a main pipeline provided with a liquid outlet. The first branch pipe and the second branch pipe are connected in parallel to the main pipe, the first branch pipe and the first flow channel are communicated, and the second branch pipe and the second flow channel are communicated.

7. The anti-residue device of any of claims 1-3 and 5, wherein, The head of the brewing member is provided with a filter port, and a filter screen is arranged in the filter port.

8. The anti-residue device of any of claims 1-3 and 5, wherein, The anti-residue device further comprises: A piston member movably arranged in the brewing chamber for receiving the residual fluid in the first flow channel and the flow member and draining the residual fluid to the brewing port.

9. A method of preparing a beverage, characterized in that, The beverage preparation method is based on the anti-residue device of claim 8, and the beverage preparation method comprises: Pouring the brewing material into the brewing chamber of the brewing bin; Controlling the brewing bin and the brewing member to move close to each other until the brewing member closes the brewing port of the brewing bin; Injecting fluid into the brewing chamber; Controlling the piston member to rise to compress and extract the fluid and the brewing material on the piston member to form a beverage and open the first flow channel to drain the beverage into the corresponding device through the opened first flow channel; Controlling the piston member to descend to generate negative pressure in the brewing bin to close the first flow channel, open the second flow channel, and make the residual beverage fall onto the piston member through the opened second flow channel; Controlling the brewing bin and the brewing member to move away from each other until the brewing port of the brewing bin is opened; Controlling the piston member to rise to the top of the brewing bin, and the beverage is discharged from the brewing port of the brewing bin.

10. The method of claim 9, wherein, The control of the brewing bin and the brewing member to move close to each other specifically comprises: Controlling the brewing bin to move in the direction close to the brewing member, or / and, controlling the brewing member to move in the direction close to the brewing bin.

11. The method of claim 9, wherein, The control of the brewing bin and the brewing member to move away from each other specifically comprises: Controlling the brewing bin to move in the direction away from the brewing member, or / and, controlling the brewing member to move in the direction away from the brewing bin.

12. An electrical appliance characterized by The electric appliance device comprises the anti-residue device of any one of claims 1-8.

13. The electrical appliance of claim 12, wherein, The electric appliance device is a full-automatic coffee machine.

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