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 brewing bin of the residual prevention device is provided with a brewing chamber, the brewing chamber is provided with a brewing opening, a brewing element moves back and forth relative to the brewing bin through the brewing opening, a flow guide element is communicated with the brewing chamber through an opened first flow guide channel, a first switching element is arranged in the first flow guide channel to open and close the first flow guide channel, the first switching element is provided with a flow guide part, and the flow guide part is communicated with the flow guide element and the brewing chamber. The application can discharge the fluid retained in the first flow guide channel and the flow guide element 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 retained fluid, and improve the user experience.

Description

Technical Field

[0001] This application belongs to the field of household appliance technology, specifically relating to an anti-residue device, a beverage preparation method, and electrical equipment. Background Technology

[0002] In existing beverage preparation equipment, after beverage preparation, a certain amount of fluid remains in the guide between the brewing chamber and the beverage outlet. This 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 prolonged stagnation, affecting the user experience. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides an anti-residue device, a beverage preparation method, and an electrical appliance to prevent the fluid quality from deteriorating due to prolonged retention of fluid in the guide component between the brewing chamber and the beverage outlet, thus affecting the user experience.

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

[0005] In a first aspect, this application provides a residue prevention device, comprising: a brewing chamber having a brewing room and a brewing port; a brewing component that moves through the brewing port and reciprocates relative to the brewing chamber, the brewing component having an openable and closable first flow channel; a flow guide communicating with the brewing room through the open first flow channel; and a first switching component disposed within the first flow channel to open and close the first flow channel, the first switching component having a flow guide portion communicating with the flow guide and the brewing chamber; when the brewing component and the brewing chamber move closer together, the first flow channel opens, and fluid in the brewing chamber is led out through the first flow channel to the flow guide; when the brewing component and the brewing chamber move away from each other, residual fluid in the flow guide is led into the brewing chamber through the flow guide portion and discharged through the brewing port.

[0006] In practical use, the anti-residue device provided in this application, after the fluid in the brewing chamber has finished brewing, controls the brewing component and the brewing chamber to move closer together, the first guide channel is opened, and the fluid in the brewing chamber is guided to the corresponding equipment through the first guide channel and the guide part to prepare the beverage; after the beverage is prepared, controls the brewing component and the brewing chamber to move away from each other, the residual fluid in the guide component is guided to the brewing chamber through the guide part and discharged through the brewing port of the brewing chamber, thereby draining the fluid retained in the guide component from the brewing chamber, so as to avoid the problem of fluid quality deterioration due to long-term retention, and improve the user experience.

[0007] In some embodiments, the first switching element includes: a first valve core, movably disposed within the first flow channel, with its head facing the brewing chamber and blocking the first flow channel; the body of the first valve core is loosely fitted within the first flow channel, and the projection of the body of the first valve core falls within the head of the first valve core; and a first elastic member, with its two ends respectively connected to the back of the first valve core and the inner wall of the first flow channel. When the brewing component and the brewing chamber move closer together, the fluid in the brewing chamber is compressed and flows into the first flow channel, acting on the head of the first valve core, forcing the first elastic member to be compressed, thereby allowing the fluid to flow out through the gap between the body of the first valve core and the first flow channel, thus opening the first flow channel; conversely, when the brewing component and the brewing chamber move further apart, a negative pressure is generated within the brewing chamber, forcing the first elastic member to drive the first valve core back to its original position, thus closing the first flow channel.

[0008] In some embodiments, the flow guiding part includes: a first flow guiding groove disposed on the outer peripheral surface of the head of the first valve core, and / or a first flow guiding hole disposed on the first valve core, the first flow guiding hole being disposed through the first valve core along an axial direction parallel to or along the first valve core, wherein, under the condition that the head of the first valve core blocks the first flow guiding channel, the first flow guiding groove and / or the first flow guiding hole connect the first flow guiding channel and the brewing chamber, so as to guide the residual fluid in the flow guiding part to the brewing chamber through the first flow guiding groove and / or the first flow guiding hole.

[0009] In some implementations, the first switching component further includes: a first valve seat disposed at one end of the flow guide channel facing the brewing chamber, the first valve seat being provided with a first liquid inlet channel and a first liquid expansion channel, the brewing chamber, the first liquid inlet channel and the first liquid expansion channel being sequentially connected, the cross-sectional area of ​​the first liquid expansion channel increasing sequentially in the direction away from the brewing chamber, and the head of the first valve core being movably disposed within the first liquid expansion channel.

[0010] In some embodiments, the flow guiding part includes: a second flow guiding groove disposed on the inner wall of the first liquid expansion channel, and / or a second flow guiding hole disposed on the first valve seat, wherein the axial direction of the second flow guiding hole is parallel to the axial direction of the first valve core, and under the condition that the head of the first valve core blocks the first flow guiding channel, the second flow guiding groove and / or the second flow guiding hole connect the first flow guiding channel and the brewing chamber, so as to guide the residual fluid in the flow guiding part to the brewing chamber through the first flow guiding groove and / or the first flow guiding hole.

[0011] In some implementations, the head of the brewing component is provided with a filter port, and a filter screen is provided inside the brewing port.

[0012] In some embodiments, the residue prevention device further includes a piston element, which is reciprocally movable within the brewing chamber to collect residual fluid in the first flow channel and the flow element, and to guide the residual fluid to the brewing outlet for discharge.

[0013] Secondly, this application also provides a beverage preparation method based on the aforementioned anti-residue device. The beverage preparation method includes: adding a brewing agent into the brewing chamber of the brewing chamber; controlling the brewing chamber and the brewing component to move closer together until the brewing component closes the brewing port of the brewing chamber; injecting fluid into the brewing chamber; controlling the piston component to rise to compress and extract the fluid and brewing agent on the piston component to form a beverage, and opening the first guide channel to guide the beverage through the opened first guide channel to a corresponding device; controlling the piston component to fall down to create a negative pressure in the brewing chamber to close the first guide channel, and the residual beverage falls onto the piston component through the guide channel; controlling the brewing chamber and the brewing component to move away from each other until the brewing port of the brewing chamber opens; controlling the piston component to rise to the top of the brewing chamber, and the fluid is discharged from the brewing port of the brewing chamber.

[0014] The beverage preparation method provided in this application can discharge the fluid retained in the guide component from the brewing chamber, thereby avoiding the problem of fluid quality degradation due to prolonged retention and improving the user experience.

[0015] In some implementations, controlling the brewing tank and the brewing component to move closer together specifically includes: controlling the brewing tank to move closer to the brewing component, and / or controlling the brewing component to move closer to the brewing tank.

[0016] In some implementations, controlling the brewing tank and the brewing component to move away from each other specifically includes: controlling the brewing tank to move away from the brewing component, and / or controlling the brewing component to move away from the brewing tank.

[0017] Thirdly, this application also provides an electrical device, which includes the aforementioned anti-residue device.

[0018] Electrical equipment equipped with the aforementioned anti-residue device can discharge the fluid trapped in the flow guide into the brewing chamber, thereby avoiding the problem of fluid quality deterioration due to prolonged retention and improving the user experience.

[0019] In some implementations, the electrical appliance is a fully automatic coffee machine. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] In the attached image:

[0022] Figure 1 A cross-sectional schematic diagram of an anti-residue device according to one or more embodiments of this application is shown;

[0023] Figure 2 It shows Figure 1 An explosion diagram;

[0024] Figure 3 It shows Figure 1 A schematic diagram of the structure of the brewing components;

[0025] Figure 4 It shows Figure 3 A top-down view;

[0026] Figure 5 It shows Figure 3 A schematic diagram of the AA cross-section;

[0027] Figure 6 It shows Figure 3 A schematic diagram of the base structure;

[0028] Figure 7 It shows Figure 6 Another structural diagram from a different perspective;

[0029] Figure 8 It shows Figure 3 A schematic diagram of the flow guide component in the middle;

[0030] Figure 9 A schematic flowchart of a beverage preparation method based on the residue prevention device of Embodiment 1 is shown;

[0031] Figure 10 A schematic diagram of the structure of the first guide groove on the first valve core is shown;

[0032] Figure 11 A schematic diagram of the structure of the first flow guide hole on the first valve core is shown;

[0033] Figure 12 It shows Figure 11 Another structural diagram from a different perspective;

[0034] Figure 13A schematic flowchart of a beverage preparation method based on the residue prevention device of Embodiment 1 is shown;

[0035] Figure 14 A schematic diagram of the structure of the second guide channel on the first valve seat is shown;

[0036] Figure 15 A schematic diagram of the structure of the second flow guide hole on the first valve seat is shown;

[0037] Figure 16 It shows Figure 15 A structural diagram from another perspective.

[0038] Figure label:

[0039] Brewing chamber-100, brewing room-101, brewing port-102;

[0040] Brewing component-200, filter port-201, filter screen-202, base-203, first through hole-204, second through hole-205, first guide column-206, first guide section-207, second guide section-208, third guide section-209, second guide column-210, fourth guide section-211, fifth guide section-212, overlapping platform-213, annular groove-214, sealing component-215;

[0041] First flow guide channel -300, first liquid inlet channel -301, first liquid expansion channel -302;

[0042] Second flow guide channel -400, second liquid inlet channel -401, second liquid expansion channel -402;

[0043] Flow guide - 500, main pipe - 501, first branch pipe - 502, second branch pipe - 503, connector - 504, infusion port - 505;

[0044] First switching component-600, first valve core-601, first elastic component-602, first valve seat-603, first positioning post-604, first guide groove-605, first guide hole-606, second guide groove-607, second guide hole-608;

[0045] Second switching component-700, second valve core-701, second elastic component-702, second valve seat-703, second positioning pin-704;

[0046] Piston part-800. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] This application is described below with reference to the accompanying drawings and specific embodiments:

[0051] In related technologies, beverage preparation equipment, especially pressure coffee machines, typically involves placing coffee beans, coffee powder, or coffee powder packets into the brewing chamber of the coffee maker and injecting fluid at a set temperature and pressure into the brewing chamber. After extracting the set amount of coffee beverage, the equipment stops supplying the coffee. Then, the brewing chamber is opened automatically or manually, and the residue inside is discharged, allowing the next brewing cycle to begin.

[0052] In commercially available beverage preparation equipment, a certain amount of coffee liquid remains in the guide between the brewing chamber and the beverage outlet after brewing. This retained coffee liquid cannot be discharged from the beverage outlet or returned to the brewing chamber. When the next brewing cycle is too long, the temperature of the retained coffee liquid drops, its flavor is lost, and it may even spoil. During the next brewing, the retained coffee liquid is discharged into the cup along with the fresh coffee liquid, resulting in the overall temperature and quality of the coffee beverage failing to meet requirements, leading to a decline in coffee quality and negatively impacting the user experience.

[0053] The conventional solution is to increase the waiting time for the next brewing to allow the coffee liquid in the infuser to evaporate, thus minimizing the impact of residual coffee liquid on the beverage. However, this would affect the efficiency of beverage preparation. Alternatively, the infuser can be rinsed to remove residual coffee liquid. However, rinsing water remains in the infuser after rinsing, which still affects the quality of the beverage and adds unnecessary steps, further reducing the efficiency of beverage preparation.

[0054] Based on the above-mentioned technical problems, this application provides an anti-residue device, a beverage preparation method, and an electrical device to avoid the technical problem of fluid quality degradation caused by long-term retention of fluid in the guide component between the brewing chamber and the beverage outlet, which affects the user experience.

[0055] The design concept of the anti-residue device provided in this application is as follows: under the condition that the brewing component and the brewing chamber move close to each other, that is, under the condition of brewing and extraction, the fluid in the brewing chamber can be led out to the guide component through the brewing component; under the condition that the brewing component and the brewing chamber move away from each other, the residual fluid in the guide component can be guided into the brewing chamber and discharged through the brewing port of the brewing chamber, so as to avoid the problem of fluid quality deterioration due to long-term retention, thereby improving the user experience.

[0056] Example 1:

[0057] Based on the above design concept, this application provides an anti-residue device. Figure 1 A cross-sectional schematic diagram of an anti-residue device according to one or more embodiments of this application is shown. Figure 2 It shows Figure 1 A schematic diagram of the explosion. Combined with... Figure 1 as well as Figure 2The residue prevention device includes a brewing chamber 100, a brewing component 200, and a flow guide 500 for conveying fluid. The brewing chamber 100 has a brewing room 101 with a brewing port 102. The brewing component 200 moves through the brewing port 102 and can reciprocate relative to the brewing chamber 100. The brewing component 200 has a first flow guide channel 300 and a second flow guide channel 400. One end of the first flow guide channel 300 and one end of the second flow guide channel 400 are connected to the brewing room 101, and the other end of the first flow guide channel 300 is connected to the second flow guide channel 400. The other end of each channel 400 is connected to the guide member 500. When the brewing component 200 and the brewing chamber 100 move closer together, the first guide channel 300 opens and the second guide channel 400 closes to draw the fluid in the brewing chamber 100 out through the first guide channel 300. When the brewing component 200 and the brewing chamber 100 move further apart, the first guide channel 300 closes and the second guide channel 400 opens to draw the fluid in the first guide channel 300 into the brewing chamber 100 through the opened second guide channel 400 and discharge it through the brewing port 102.

[0058] In actual use, the anti-residue device provided in this application embodiment, after the fluid in the brewing chamber 100 has finished brewing, controls the brewing component 200 and the brewing chamber 100 to move closer together, the first guide channel 300 opens, and the second guide channel 400 closes. The fluid in the brewing chamber 100 is guided to the corresponding equipment through the first guide channel 300 and the guide component 500 to prepare the beverage; after a set amount of fluid is drawn out from the brewing chamber 100, controls the brewing component 200 and the brewing chamber 100 to move further apart. When the vessel is moved, a negative pressure is formed inside the brewing chamber 100. The first guide channel 300 is closed, and the second guide channel 400 is opened. This allows the fluid in the first guide channel 300 and the guide member 500 to be guided into the brewing chamber 100 through the opened second guide channel 400 and discharged through the brewing port 102 of the brewing chamber 100. This allows the fluid that is stagnant in the guide member 500 to be discharged from the brewing chamber 100, thus avoiding the problem of fluid quality deterioration due to long-term stagnation and improving the user experience.

[0059] Combination Figure 1 as well as Figure 2 The brewing port 102 can be located at the top of the brewing chamber 101 of the brewing tank 100. The brewing component 200 and the brewing tank 100 can be moved away from each other by an external driving mechanism. When the brewing component 200 is completely separated from the brewing tank 100, the brewing port 102 opens. Then, the brewing agent required for preparing the beverage can be injected into the brewing chamber 101 of the brewing tank 100 through the open brewing port 102. After the brewing agent is injected, the brewing component 200 and the brewing tank 100 are driven to move closer to each other, so that the brewing port 102 can be closed to prepare the liquid for brewing.

[0060] Figure 3 It shows Figure 1 A schematic diagram of the structure of the brewing components. Figure 4 It shows Figure 3 A top-down view diagram. Figure 5 It shows Figure 3 A schematic diagram of the AA cross section. Figure 6 It shows Figure 3 A schematic diagram of the base structure. Figure 7 It shows Figure 6 A structural diagram from another perspective. Combined with... Figures 1-7 The brewing component 200 has an overall columnar shape that matches the brewing chamber 101. A sealing component 215 is provided between the circumference of the brewing component 200 and the side wall of the brewing chamber 101 to ensure a sealing effect between the two when the brewing component 200 is inside the brewing chamber 101, so as to prevent fluid from overflowing from between the brewing component 200 and the brewing chamber 101.

[0061] Combination Figures 1-6 Since the brewing component 200 moves back and forth, an annular groove 214 may be provided on the circumferential surface of the brewing component 200 in this embodiment of the application. The sealing component 215 is disposed in the annular groove 214 and has a sealing portion protruding from the annular groove 214. When the brewing component 200 moves back and forth relative to the brewing chamber 100, the sealing portion of the sealing component 215 will be compressed, thereby ensuring the sealing between the brewing component 200 and the brewing chamber 101.

[0062] Combination Figures 1-6 The head of the brewing unit 200 is provided with a filter port 201, through which fluid can enter and exit. A filter screen 202 can be installed inside the filter port 201 to improve the extraction quality of the fluid.

[0063] Combination Figure 6 The head of the brewing unit 200 may be provided with a base 203, and the end face of the base 203 facing the brewing chamber 100 is provided with the aforementioned filter port 201, and the filter screen 202 is installed on the base 203. The base 203 may be provided with a first through hole 204 communicating with the first flow channel 300 and a second through hole 205 communicating with the second flow channel 400, so as to realize the flow of fluid.

[0064] Combination Figures 1-7 An overlap platform 213 may be provided on the outer peripheral surface of the base 203. When the brewing component 200 moves into the brewing chamber 100, the overlap platform 213 will abut against the top of the brewing chamber 100 to limit the movement of the brewing component 200 and improve the safety of the device during operation.

[0065] Combination Figure 1 , Figure 2 as well as Figure 5A first switching element 600 is provided in the first flow channel 300 to control the opening and closing of the first channel. The first switching element 600 includes a first valve core 601 and a first elastic element 602. The first valve core 601 is movably disposed in the first flow channel 300. 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 is disposed around the first flow channel 300 with 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 element 602 are respectively connected to the back of the first valve core 601 and the inner wall of the first flow channel 300. When the brewing component 200 and the brewing chamber 100 move closer together, the fluid in the brewing chamber 100 is compressed and flows into the first guide channel 300, acting on the head of the first valve core 601 and forcing the first elastic element 602 to be compressed. This allows the fluid to flow out through the gap between the body of the first valve core 601 and the first guide channel 300, thus opening the first guide channel 300. Conversely, when the brewing component 200 and the brewing chamber 100 move further apart, a negative pressure is generated in the brewing chamber 100, forcing the first elastic element 602 to drive the first valve core 601 back to its original position, thus closing the first guide channel 300.

[0066] Combination Figure 1 , Figure 2 as well as Figure 5 The first flow channel 300 includes a first liquid inlet channel 301 and a first liquid expansion channel 302 arranged along the moving direction of the brewing component 200. The brewing chamber 101, the first liquid inlet channel 301 and the first liquid expansion channel 302 are connected in sequence. The cross-sectional area of ​​the first liquid expansion channel 302 increases in sequence in the direction away from the brewing chamber 101. The head of the first valve core 601 is movably disposed 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 positioned in the first liquid expansion channel 302 to close the first guide channel 300. When the brewing component 200 and the brewing chamber 100 move closer 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, forcing 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 sequentially 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 gap between the body of the first valve core 601 and the first guide channel 300.

[0067] Combination Figure 1 , Figure 2 as well as Figure 5The first switching component 600 also includes a first valve seat 603. The first liquid inlet channel 301 and the first liquid expansion channel 302 are arranged on the first valve seat 603 along the moving direction of the brewing component 200. The brewing chamber 101 can be connected to the first liquid inlet channel 301 and the first liquid expansion channel 302 in sequence through the first through hole 204 to realize the transportation of fluid.

[0068] Specifically, in combination Figure 1 , Figure 2 , Figure 5 as well as Figure 7 A first guide column 206 can be provided on the top of the base 203. The first guide column 206 can be axially continuous to form a first guide channel 300. The section of the first guide channel 300 near the brewing chamber 100 can be designated as the first guide section 207, the section in the middle of the first guide channel 300 can be designated as the second guide section 208, and the section away from the brewing chamber 100 can be designated as the third guide section 209. The first guide section 207, the second guide section 208, and the third guide section 209 are coaxially connected in sequence, and the diameters of the first guide section 207, the second guide section 208, and the third guide section 209 decrease sequentially. A first valve seat 603 is fixedly provided at the bottom of the first guide section 207, and there is a distance between the first valve seat 603 and the top of the first guide section 207. The head of the first valve core 601 can be arc-shaped. A valve core 601 is fitted with a clearance between its body and the first guide section 207. A first positioning post 604 may be provided on the back of the first valve core 601. The first positioning post 604 can move through the first guide section 207 and enter the second guide section 208. The first elastic element 602 may be a spring, with its two ends connected to or abutting against the back of the first valve core 601 and the top of the second guide section 208, respectively. The first elastic element 602 is fitted on the first positioning post 604 to provide guidance for the compression and reset of the first elastic element 602. The fluid in the brewing chamber 100 can flow out sequentially through the first guide section 207, the second guide section 208 and the third guide section 209.

[0069] In other embodiments, the head of the first valve core 601 may also be conical or frustoconical, and there is no limitation on this. In addition, the outer diameter of the third guide section 209 may be smaller than the outer diameter of the second guide section 208, which can facilitate the assembly of the first elastic member 602 and the guide member 500. The assembly of the guide member 500 can be referred to the description below.

[0070] Combination Figure 1 , Figure 2 as well as Figure 5A second switching element 700 is provided in the second flow channel 400 to control the opening and closing of the second channel. The second switching element 700 includes a second valve core 701 and a second elastic element 702. The second valve core 701 is movably disposed in the second flow channel 400. The head of the second valve core 701 faces away from the brewing chamber 100 and blocks the second flow channel 400. The second valve core 701 is disposed around the second flow channel 400 with 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 element 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 component 200 moves closer to the brewing chamber 100, the fluid in the brewing chamber 100 is compressed and flows into the second guide channel 400, acting on the back of the second valve core 701. The head of the second valve core 701 blocks the second guide channel 400, allowing the fluid to flow out only through the first guide channel 300. At the same time, the second elastic element 702 is stretched to close the second guide channel 400. Conversely, when the brewing component 200 moves further away from the brewing chamber 100, a negative pressure is generated in the brewing chamber 100, forcing the second elastic element 702 to return to its original position. The second elastic element 702 drives the second valve core 701 to move, opening the second guide channel 400 to guide the fluid in the guide component 500 through the opened second guide channel 400 into the brewing chamber 100, and then discharge it through the brewing port 102 of the brewing chamber 100.

[0071] Combination Figure 1 , Figure 2 as well as Figure 5The second flow guide 500 includes a second liquid inlet channel 401 and a second liquid expansion channel 402 arranged sequentially along the moving direction of the brewing component 200. The second liquid inlet channel 401 and the second liquid expansion channel 402 are connected to the brewing chamber 101 sequentially through the second through hole 205. The cross-sectional area of ​​the second liquid expansion channel 402 increases sequentially in the direction closer to the brewing chamber 101. The head of the second valve core 701 is movably disposed in the second liquid expansion channel 402. When the brewing component 200 and the brewing chamber 100 move close to each other, the fluid in the brewing chamber 100 is compressed and flows into the second flow guide channel 400, acting 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 component 200 moves closer to the brewing chamber 100, the fluid in the brewing chamber 100 moves closer to the brewing chamber 101. When the brewing chamber 100 and the brewing chamber 500 are moved away from each other, the negative pressure generated in the brewing chamber 100 forces the second elastic element 702 to return to its original position. The second elastic element 702 drives the second valve core 701, which is located in the second liquid expansion channel 402, to move towards the brewing chamber 100, so as to open the second guide channel 400, so as to guide the fluid in the guide element 500 through the opened second guide channel 400 to the brewing chamber 100, and discharge it through the brewing port 102 of the brewing chamber 100.

[0072] Specifically, in combination Figure 1 , Figure 2 , Figure 5 as well as Figure 7A second guide column 210 can be provided on the top of the base 203. The second guide column 210 can be axially extended to form a second guide channel 400. The section of the second flow channel 400 near the brewing chamber 100 can be designated as the fourth flow channel 211, and the section of the second flow channel 400 away from the brewing chamber 100 can be designated as the fifth flow channel 212. The fourth flow channel 211 and the fifth flow channel 212 are coaxially connected sequentially, and their diameters decrease sequentially. A second valve seat 703 can be provided at the bottom of the fourth flow channel 211. The second valve seat 703 and the top of the fourth flow channel 211 are at a distance. The second valve seat 703 is provided with a through third through hole. The brewing chamber 101 is connected to the fourth flow channel 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 element 702 is connected to the stepped hole, and the top end of the second elastic element 702 is connected to the fifth flow channel 212. On the back of the second valve core 701, the fifth guide section 212 can be the aforementioned second liquid inlet channel 401, and the second liquid expansion channel 402 is located at the transition between the fifth guide section 212 and the fourth guide section 211. The head of the second valve core 701 can be arc-shaped, and the body of the second valve core 701 and the fourth guide section 211 are in clearance fit. A second positioning post 704 can be provided on the back of the second valve core 701. The second positioning post 704 is movably disposed in the fourth guide section 211. The second elastic element 702 can be a spring. The second elastic element 702 is fitted on the second positioning post 704 to provide guidance for the compression and reset of the second elastic element 702. The fluid in the guide member 500 can flow into the brewing chamber 100 in sequence through the fifth and fourth guide sections 211, the third through hole, and the second through hole 205.

[0073] In other embodiments, the head of the first valve core 601 may also be conical or frustoconical, and there is no limitation on this. In addition, the outer diameter of the fifth guide section 212 may be smaller than the outer diameter of the fourth guide section 211, which can facilitate the assembly of the guide member 500. The assembly of the guide member 500 can be referred to the following description.

[0074] As described above, both the first switching element 600 and the second switching element 700 are pressure control valves, i.e., valves controlled by pressure. In other embodiments, the second switching element and the second switching element can also be other types of valves. For example, the periphery of the switching element has a certain elasticity, and under pressure, the elasticity of the switching element is completely deformed, thereby opening the passage.

[0075] Combination Figure 1 , Figure 2 as well as Figure 5 The residue prevention device also includes a flow guide 500. Figure 8 It shows Figure 3 The structural diagram of the guide component in the middle, combined with Figure 1 , Figure 2 , Figure 5 as well as Figure 8 The flow guide 500 includes a main pipe 501, a first branch pipe 502, and a second branch pipe 503. The main pipe 501 is equipped with a liquid inlet 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 connected to the first flow guide channel 300, and the second support and the second flow guide channel 400 are connected. In actual implementation, after the fluid in the brewing chamber 100 has finished brewing, the brewing component 200 is controlled to move towards the brewing chamber 100, the first flow guide channel 300 is controlled to open, and the second flow guide channel 400 is controlled to close. 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 guided to the corresponding equipment through the liquid inlet 505 of the main pipe 501 to prepare the beverage. After a set amount of fluid is drawn out of the brewing chamber 100, the brewing component 200 is controlled to move away from the brewing chamber 100. As the direction moves, a negative pressure is formed inside the brewing chamber 100, controlling the first flow channel 300 to close and the second flow channel 400 to open. This allows the fluid in the main pipe 501 and the first flow channel 300 to be guided into the brewing chamber 100 through the second branch pipe 503 and the opened second flow channel 400, and then discharged through the brewing port 102 of the brewing chamber 100. This discharges the fluid that is trapped in the flow guide 500 from the brewing chamber 100, thus avoiding the problem of fluid quality deterioration due to prolonged retention and improving the user experience.

[0076] In this embodiment, 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 guide section 209 of the first guide column 206 via a connector 504, and the second branch pipe 503 is connected to the fourth guide section 211 of the second guide column 210 via another connector 504. In other embodiments, the first branch pipe 502 can be threaded onto the outer circumferential surface of the third guide section 209 of the first guide column 206, and the second branch pipe 503 can be threaded onto the outer circumferential surface of the fourth guide section 211 of the second guide column 210. Then, the main pipe 501 can be inserted into the first branch pipe 502 and the second branch pipe 503. No limitation is imposed here.

[0077] In related technologies, the brewing port 102 is located at the bottom of the brewing chamber 100 to discharge stagnant fluid residue. However, since the brewing port 102 needs to be closed when brewing fluid in the brewing chamber 100, a device is needed to control the opening and closing of the brewing port 102 to adapt to different operating conditions, which increases the cost.

[0078] Based on this, combined Figure 1 as well as Figure 2The anti-residue device in this application embodiment also includes a piston 800, which is disposed in the brewing chamber 101 and can be moved back and forth under the drive of an external force to collect fluid.

[0079] Figure 9 A schematic flowchart of a beverage preparation method based on the residue prevention device of Embodiment 1 is shown. Combined with... Figure 9 The preparation method of this beverage includes:

[0080] Adding brewing agent into the brewing chamber 101 of the brewing chamber 100: With the brewing chamber 100 and the brewing component 200 completely separated, the brewing port 102 at the top of the brewing chamber 100 is opened, and brewing agent, such as coffee beans, is added into the brewing chamber 101 of the brewing chamber 100 through the opened brewing port 102. The brewing agent falls onto the top of the piston component 800.

[0081] Control the brewing chamber and brewing component to move closer together until the brewing component closes the brewing port of the brewing chamber: In actual implementation, the brewing chamber 100 can be controlled to move towards the brewing component 200, or the brewing component 200 can be controlled to move towards the brewing chamber 100, or both the brewing chamber 100 and the brewing component 200 can be controlled to move closer together;

[0082] Injecting fluid into brewing chamber 101: As brewing chamber 100 and brewing component 200 move closer together, the air inside brewing chamber 100 is compressed, and the first flow channel 300 is at least partially opened. Therefore, fluid can be injected into brewing chamber 100 through flow guide 500. In other embodiments, a dedicated delivery pipe may also be provided to inject fluid into brewing chamber 100, which is not limited here.

[0083] The piston 800 is controlled to rise to compress and extract the fluid and brewing material on the piston 800 to form a beverage, and the first guide channel 300 is opened to guide the beverage through the opened first guide channel 300 to the corresponding device.

[0084] The piston 800 is controlled to descend, and the piston 800 can descend to the bottom of the brewing chamber 100 to create a negative pressure inside the brewing chamber 100, thereby closing the first flow channel 300 and opening the second flow channel 400. The remaining beverage falls onto the piston 800 through the opened second flow channel 400.

[0085] The brewing chamber 100 and the brewing component 200 are controlled to move away from each other until the brewing port 102 of the brewing chamber 100 is opened. In actual implementation, the brewing chamber 100 can be controlled to move away from the brewing component 200, the brewing component 200 can be controlled to move away from the brewing chamber 100, or both the brewing chamber 100 and the brewing component 200 can be controlled to move away from each other.

[0086] The control piston 800 rises to the top of the brewing chamber 100, and the fluid is discharged from the brewing port 102 of the brewing chamber 100.

[0087] In the above solution, the rising of piston 800 can also extract the fluid to produce a beverage, and can avoid the need to separately open a slag discharge port and add devices to control the opening and closing of the slag discharge port, thereby reducing costs and having good practicality.

[0088] Example 2:

[0089] In this embodiment, the second switching component 700 and the second flow channel 400 of Embodiment 1 are eliminated, and a flow guide is provided on the first switching component 600. The flow guide connects the flow guide 500 and the brewing chamber 101. When the brewing component 200 and the brewing chamber 100 move closer to each other, the first flow guide 300 is opened, and the fluid in the brewing chamber 100 is led out to the flow guide 500 through the first flow guide 300 and the flow guide. When the brewing component 200 and the brewing chamber 100 move apart, the residual fluid in the flow guide 500 is led into the brewing chamber 100 through the flow guide and discharged through the brewing port 102.

[0090] In actual use, the anti-residue device provided in this application, after the liquid in the brewing chamber 100 has finished brewing, controls the brewing component 200 and the brewing chamber 100 to move closer together, the first guide channel 300 is opened, and the liquid in the brewing chamber 100 is guided to the corresponding equipment through the first guide channel 300 and the guide part to prepare the beverage; after the beverage is prepared, controls the brewing component 200 and the brewing chamber 100 to move away from each other, a negative pressure is generated in the brewing chamber 100, the first guide channel 300 is closed, and the residual liquid in the guide component 500 is guided to the brewing chamber 100 through the guide part and discharged through the brewing port 102 of the brewing chamber 100, thereby draining the liquid retained in the guide component 500 from the brewing chamber 100, so as to avoid the problem of liquid quality deterioration due to long-term retention, and improve the user experience.

[0091] In some embodiments, the flow guide may include a first flow guide groove 605 disposed on the outer peripheral surface of the head of the first valve core 601 (e.g., Figure 10 As shown), or / and, a first guide hole 606 (as shown) is provided on the first valve core 601. Figure 11 , Figure 12As shown), the first guide hole 606 is arranged parallel to or through the first valve core 601. When the head of the first valve core 601 blocks the first guide channel, the first guide groove 605 and / or the first guide hole 606 connect the first guide channel and the brewing chamber.

[0092] With the flow guide portion being the first flow guide groove 605, the first flow guide groove 605 can be U-shaped. The two ends of the first flow guide groove 605 are positioned opposite each other at the end of the head of the first valve core 601 facing the periphery of the first valve core 601, and the middle part of the first flow guide groove 605 is positioned at the end of the head of the first valve core 601 facing away from the periphery of the first valve core 601. The first flow guide groove 605 communicates with the first liquid inlet channel 301. One or more first flow guide grooves 605 can be provided. In the case of multiple first flow guide grooves 605, the middle parts of the multiple first flow guide grooves 605 can converge at the center of the head of the first valve core 601. In practice, after the brewing process in the brewing chamber 100 is completed, when the brewing component 200 and the brewing chamber 100 move closer together, the fluid in the brewing chamber 100 is compressed and flows into the first guide channel 300. This compresses the fluid and acts on the head of the first valve core 601, forcing the first elastic element 602 to be compressed. This allows the fluid to flow out through the gap between the first valve core 601 and the first guide channel 300, as well as the first guide groove 605, thus opening the first guide channel 300. Conversely, when the brewing component 200 and the brewing chamber 100 move further apart, a negative pressure is generated in the brewing chamber 100, forcing the first elastic element 602 to drive the first valve core 601 back to its original position, thus closing the first guide channel 300. The fluid remaining in the guide component 500 flows through the first guide groove 605 to the brewing chamber 101 of the brewing chamber 100 and is discharged through the brewing port. This avoids the problem of fluid quality deterioration due to prolonged stagnation, thereby improving the user experience.

[0093] When the flow guide is the first flow guide hole 606, the first flow guide hole 606 can be provided in one or more ways. The first flow guide hole 606 can be provided along the axial direction of the first valve core 601 or parallel to the axial direction of the first valve core 601, or it can be inclined to the axial direction of the first valve core 601. It is only necessary to ensure that the first flow guide hole 606 and the first liquid inlet channel 301 are in communication. In practice, after the brewing process in the brewing chamber 100 is completed, the brewing component 200 and the brewing chamber 100 are moved closer together. The fluid in the brewing chamber 100 is compressed and flows into the first guide channel 300, acting on the head of the first valve core 601. This forces the first elastic element 602 to be compressed, allowing the fluid to flow out through the gap between the first valve core 601 and the first guide channel 300, as well as the first guide hole 606, thus opening the first guide channel 300. Conversely, if the brewing component 200 and the brewing chamber 100 are moved further apart, a negative pressure is generated in the brewing chamber 100, forcing the first elastic element 602 to drive the first valve core 601 back to its original position, thus closing the first guide channel 300. The fluid remaining in the guide component 500 flows through the first guide hole 606 to the brewing chamber 101 of the brewing chamber 100 and is discharged through the brewing port 102, thus avoiding the problem of fluid quality degradation due to prolonged stagnation and improving the user experience.

[0094] Alternatively, the flow guide can be a combination of the first flow guide groove 605 and the first flow guide hole 606. The implementation method can be referred to the above description, and will not be repeated here.

[0095] Based on the aforementioned residue prevention device, this embodiment also discloses a beverage preparation method. Figure 13 A schematic flowchart of a beverage preparation method based on the residue prevention device of Embodiment 1 is shown, combined with... Figure 13 The preparation method of this beverage includes:

[0096] Adding brewing agent into the brewing chamber 101 of the brewing chamber 100: With the brewing chamber 100 and the brewing component 200 completely separated, the brewing port 102 at the top of the brewing chamber 100 is opened, and brewing agent, such as coffee beans, is added into the brewing chamber 101 of the brewing chamber 100 through the opened brewing port 102. The brewing agent falls onto the top of the piston component 800.

[0097] Control the brewing chamber and brewing component to move closer together until the brewing component closes the brewing port of the brewing chamber: In actual implementation, the brewing chamber 100 can be controlled to move towards the brewing component 200, or the brewing component 200 can be controlled to move towards the brewing chamber 100, or both the brewing chamber 100 and the brewing component 200 can be controlled to move closer together;

[0098] Injecting fluid into brewing chamber 101: As brewing chamber 100 and brewing component 200 move closer together, the air inside brewing chamber 100 is compressed, the first flow channel 300 is at least partially opened, and the flow guide is also in an open state. Therefore, fluid can be injected into brewing chamber 100 through flow guide 500. In other embodiments, a dedicated delivery pipe can also be provided to inject fluid into brewing chamber 100, which is not limited here.

[0099] The piston 800 is controlled to rise to compress and extract the fluid and brewing material on the piston 800 to form a beverage, and the first guide channel 300 is opened to guide the beverage through the opened first guide channel 300 to the corresponding device.

[0100] The piston 800 is controlled to descend, and the piston 800 can descend to the bottom of the brewing chamber 100, so that negative pressure is generated inside the brewing chamber 100 to close the first guide channel 300, and the remaining beverage falls onto the piston 800 through the guide channel.

[0101] The brewing chamber 100 and the brewing component 200 are controlled to move away from each other until the brewing port 102 of the brewing chamber 100 is opened. In actual implementation, the brewing chamber 100 can be controlled to move away from the brewing component 200, the brewing component 200 can be controlled to move away from the brewing chamber 100, or both the brewing chamber 100 and the brewing component 200 can be controlled to move away from each other.

[0102] The control piston 800 rises to the top of the brewing chamber 100, and the fluid is discharged from the brewing port 102 of the brewing chamber 100.

[0103] In the above solution, the rising of piston 800 can also extract the fluid to produce a beverage, and can avoid the need to separately open a slag discharge port and add devices to control the opening and closing of the slag discharge port, thereby reducing costs and having good practicality.

[0104] Example 3:

[0105] In this embodiment, the second switching component and the second flow guiding channel of Embodiment 1 are omitted, as are the first flow guiding groove 605 and the first flow guiding hole 606 of Embodiment 2. The flow guiding part of this third embodiment is disposed on the first valve seat 603 of the first switching component 600, specifically including: a second flow guiding groove 607 disposed on the inner wall of the first liquid diffusion channel of the first valve seat 603 (e.g., ...). Figure 14 As shown), or / and, a second guide hole 608 (as shown) is provided on the first valve seat 603. Figure 15 and Figure 16As shown), the axial direction of the second guide hole 608 is parallel to the axial direction of the first valve core 601. When the head of the first valve core 601 blocks the first guide channel, the second guide groove 607 or / and the second guide hole 608 connect the first guide channel and the brewing chamber.

[0106] With the guide section being a second guide channel 607, the second guide channel 607 can be U-shaped. The two ends of the second guide channel 607 are positioned opposite each other at the top of the first valve seat 603, and the middle part of the second guide channel 607 is located at the center of the bottom of the first valve seat 603. The second guide channel 607 communicates with the first through hole 204. One or more second guide channels 607 can be provided. If multiple channels are provided, the middle parts of the multiple second guide channels 607 can converge at the center of the bottom of the first valve seat 603. In practice, after the brewing process in the brewing chamber 100 is completed, the brewing component 200 and the brewing chamber 100 are moved closer together. The fluid in the brewing chamber 100 is compressed and flows into the first guide channel 300, acting on the head of the first valve core 601. This forces the first elastic element 602 to be compressed, allowing the fluid to flow out through the gap between the first valve core 601 and the first guide channel 300, as well as the second guide groove 607, thus opening the first guide channel 300. Conversely, the brewing component 200 and the brewing chamber 100 are moved further apart. Due to the negative pressure generated in the brewing chamber 100, the first elastic element 602 forces the first valve core 601 to return to its original position, thus closing the first guide channel 300. The fluid remaining in the guide component 500 flows through the second guide groove 607 to the brewing chamber 101 of the brewing chamber 100 and is discharged through the brewing port 102, thus avoiding the problem of fluid quality degradation due to prolonged stagnation and improving the user experience.

[0107] With the guide section being the second guide hole 608, the second guide hole 608 can be provided in one or more ways. The second guide hole 608 can be arranged parallel to the axial direction of the first valve core 601 or inclined to the axial direction of the first valve core 601, as long as the second guide hole 608 and the first through hole 204 are connected. In practice, after the brewing process in the brewing chamber 100 is completed, the brewing component 200 and the brewing chamber 100 are moved closer together. The fluid in the brewing chamber 100 is compressed and flows into the first guide channel 300, acting on the head of the first valve core 601. This forces the first elastic element 602 to be compressed, allowing the fluid to flow out through the gap between the first valve core 601 and the first guide channel 300, as well as the second guide hole 608, thus opening the first guide channel 300. Conversely, the brewing component 200 and the brewing chamber 100 are moved further apart. Due to the negative pressure generated in the brewing chamber 100, the first elastic element 602 is forced to drive the first valve core 601 back to its original position, thus closing the first guide channel 300. The fluid remaining in the guide component 500 flows through the second guide hole 608 to the brewing chamber 101 of the brewing chamber 100 and is discharged through the brewing port 102, thus avoiding the problem of fluid quality degradation due to prolonged stagnation and improving the user experience.

[0108] Alternatively, the flow guide can be a combination of the second flow guide groove 607 and the second flow guide hole 608. The implementation method can be referred to the above description, and will not be repeated here.

[0109] This embodiment also provides a beverage preparation method, which can be referred to in the description of Embodiment 3, and will not be repeated here.

[0110] Example 4:

[0111] In this embodiment, the flow guiding part can be a combination of at least two of the following: the second flow guiding channel and the second switching component in Embodiment 1, the first flow guiding groove 605 and / or the first flow guiding hole 606 in Embodiment 2, and the second flow guiding groove 607 and / or the second flow guiding hole 608 in Embodiment 3. The implementation method can be referred to the above description and will not be repeated here.

[0112] Example 5:

[0113] This application provides an electrical device that includes the aforementioned anti-residue device.

[0114] Electrical equipment equipped with the aforementioned anti-residue device can discharge the fluid retained in the guide 500 into the brewing chamber 100, so that the residual fluid can be recovered in a timely manner, preventing the fluid with a decreased temperature in the next brewing cycle from mixing with the fresh fluid, ensuring the temperature and flavor of the fresh fluid, that is, avoiding the problem of fluid quality deterioration due to prolonged retention, thereby improving the user experience.

[0115] The electrical appliance can be the aforementioned fully automatic coffee machine, or other types of beverage equipment, such as various types of beverage equipment, etc., without any restrictions.

[0116] Specifically, a control panel can be installed on the electrical appliance, and instructions corresponding to the aforementioned anti-residue mode can be set on the control panel. When the user presses or touches the instructions corresponding to the control panel, the anti-residue mode of the electrical appliance can be controlled to operate. Alternatively, a sensor can be installed in the electrical appliance, and the user can control various instructions through remote control or other means to realize the operation of the anti-residue mode of the electrical appliance. This application embodiment does not impose specific limitations on this.

[0117] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0118] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0119] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0120] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0122] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0123] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A residue prevention device, characterized in that, The residue prevention device includes: The brewing chamber is equipped with a brewing room, and the brewing room is equipped with a brewing port; The brewing component moves through the brewing port and reciprocates relative to the brewing chamber. A first flow channel is provided inside the brewing component. The flow guide is connected to the brewing chamber through the opened first flow guide channel; A first switching element is disposed within the first flow channel to open and close the first flow channel. The first switching element is provided with a flow guiding part, which connects the flow guiding element and the brewing chamber. When the brewing component and the brewing chamber move closer together, the first guide channel opens, and the fluid in the brewing chamber is led out to the guide component through the first guide channel; when the brewing component and the brewing chamber move apart, the residual fluid in the guide component is led to the brewing chamber through the guide part and discharged through the brewing port. The first switching component includes: a first valve seat and a first valve core movably disposed within the first flow channel. The flow guiding part includes a second flow guiding groove and / or a second flow guiding hole disposed on the first valve seat. When the head of the first valve core blocks the first flow channel, the second flow guiding groove and / or the second flow guiding hole connect the first flow channel and the brewing chamber.

2. The anti-residue device according to claim 1, characterized in that, The head of the first valve core faces the brewing chamber, the head of the first valve core blocks the first flow channel, the body of the first valve core is spaced within the first flow channel, and the projection of the body of the first valve core falls within the head of the first valve core. The first switching element further includes: The first elastic element has its two ends connected to the back of the first valve core and the inner wall of the first flow channel, respectively.

3. The anti-residue device according to claim 2, characterized in that, The flow guide includes: A first guide groove is provided on the outer peripheral surface of the head of the first valve core, and / or a first guide hole is provided on the first valve core. The first guide hole is provided to pass through the first valve core along the axial direction parallel to or along the axial direction of the first valve core. Under the condition that the head of the first valve core blocks the first guide channel, the first guide groove and / or the first guide hole connect the first guide channel and the brewing chamber.

4. The anti-residue device according to claim 2 or 3, characterized in that: The first valve seat is disposed at one end of the flow guide channel facing the brewing chamber. The first valve seat is provided with a first liquid inlet channel and a first liquid expansion channel. The brewing chamber, the first liquid inlet channel and the first liquid expansion channel are connected in sequence. The cross-sectional area of ​​the first liquid expansion channel increases in sequence in the direction away from the brewing chamber. The head of the first valve core is movably disposed in the first liquid expansion channel.

5. The anti-residue device according to claim 4, characterized in that, The flow guide includes: The second guide groove is disposed on the inner wall of the first liquid expansion channel, and the second guide hole on the first valve seat has its axial direction parallel to the axial direction of the first valve core.

6. The anti-residue device according to any one of claims 1-3 and 5, characterized in that, The head of the brewing component is provided with a filter port, and a filter screen is provided inside the filter port.

7. The anti-residue device according to any one of claims 1-3 and 5, characterized in that, The residue prevention device also includes: A piston is movable back and forth within the brewing chamber to collect residual fluid and guide it to the brewing outlet for discharge.

8. A method for preparing a beverage, characterized in that, The beverage preparation method is based on the residue prevention device described in claim 7, and the beverage preparation method includes: Add the brewing agent into the brewing chamber of the brewing tank; Control the brewing chamber and the brewing component to move closer together until the brewing component closes the brewing port of the brewing chamber; Inject fluid into the brewing chamber; The piston is controlled to rise to compress and extract the fluid and brewing material on the piston to form a beverage, and the first guide channel is opened to guide the beverage through the opened first guide channel and guide part to the corresponding device. The piston is controlled to descend, creating negative pressure inside the brewing chamber to close the first flow channel, and the remaining beverage flows through the flow channel onto the piston. Control the brewing chamber and the brewing component to move away from each other until the brewing port of the brewing chamber opens; The piston is controlled to rise to the top of the brewing chamber, and the fluid is discharged from the brewing port of the brewing chamber.

9. The beverage preparation method according to claim 8, characterized in that, The control of moving the brewing chamber and the brewing components closer together specifically includes: Control the brewing chamber to move closer to the brewing component, or / and control the brewing component to move closer to the brewing chamber.

10. The beverage preparation method according to claim 8, characterized in that, The control of moving the brewing chamber and the brewing components away from each other specifically includes: Control the brewing chamber to move away from the brewing component, or / and control the brewing component to move away from the brewing chamber.

11. An electrical appliance, characterized in that, The electrical equipment includes the anti-residue device as described in any one of claims 1-8.

12. The electrical equipment according to claim 11, characterized in that, The electrical appliance is a fully automatic coffee machine.

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