Portable brewer

Abstract

The present invention discloses a portable brewing device, comprising: a brewing box provided with a brewing chamber having a first opening and a second opening; a main body including an air extraction device and a return air pipe, the air inlet of the air extraction device is arranged to communicate with the brewing chamber, and the air outlet of the air extraction device communicates with the atmosphere; the air inlet of the return air pipe communicates with the atmosphere, the air outlet of the return air pipe communicates with the brewing chamber, and a control valve is provided on the return air pipe; a first filter member detachably arranged in the brewing box for filtering the liquid passing through the second opening; and a conduit, one end of which is hermetically connected to the second opening; wherein, when brewing a beverage, the first opening is higher than the second opening, the other end of the conduit is inserted into a container and immersed below the liquid level in the container, and the inside of the container communicates with the atmosphere. The portable brewing device of the present invention has a simple structure and is convenient to carry, and can meet the needs of users to carry and prepare beverages when going out.

Description

Technical Field

[0001] The present invention belongs to the technical field of beverage preparation, and particularly relates to a portable brewing device. Background Art

[0002] At present, beverage brewing devices on the market are generally for household or commercial use. Generally, these beverage brewing devices are relatively large in size and inconvenient to carry. They can generally only be used fixedly indoors and cannot be carried out for use outdoors, unable to meet the needs of users to prepare beverages for drinking during travel, business trips or going out.

[0003] Therefore, a new technology is needed to solve the problem of inconvenient carrying of beverage brewing devices in the prior art. Summary of the Invention

[0004] To solve the above problems in the prior art, the present invention provides a portable brewing device, which is convenient to carry and can meet the needs of users to carry and prepare beverages when going out.

[0005] The present invention adopts the following technical solutions:

[0006] A portable brewing device, comprising:

[0007] A brewing box, the brewing box is provided with a brewing cavity, and the brewing cavity is provided with a first opening and a second opening;

[0008] A main body, including an air extraction device and a return air pipe. The air extraction inlet of the air extraction device is communicated with the brewing cavity for extracting the air in the brewing cavity, and the air extraction outlet of the air extraction device is communicated with the atmosphere; the return air inlet of the return air pipe is communicated with the atmosphere, the return air outlet of the return air pipe is communicated with the brewing cavity, and a control valve for controlling its own connection and disconnection is provided on the return air pipe;

[0009] A first filter element, detachably arranged in the brewing box for filtering the liquid passing through the second opening; and

[0010] A conduit, one end of which is hermetically connected to the second opening;

[0011] Wherein, when brewing a beverage, the first opening is higher than the second opening, the other end of the conduit is inserted into a container and immersed below the liquid level in the container, and the inside of the container is communicated with the atmosphere.

[0012] As an improvement of the technical solution of the present invention, a plurality of convex ribs are provided on the lower surface of the brewing box. When brewing a beverage, the brewing box is placed on the upper opening of the container, the convex ribs are abutted against the opening of the container, and an air ventilation gap is formed between adjacent two convex ribs, and the air ventilation gap communicates the inside of the container with the atmosphere.

[0013] As an improvement to the technical solution of the present invention, the lower end of the brewing box is in a funnel shape, and the first filter element is also in a funnel shape.

[0014] As an improvement to the technical solution of the present invention, a number of limiting ribs are provided between the lower surface of the first filter element and the inner wall of the funnel-shaped brewing box, and a liquid passage gap is formed between adjacent limiting ribs.

[0015] As an improvement to the technical solution of the present invention, the limiting ribs are provided on the lower surface of the first filter element or on the inner wall of the funnel-shaped brewing box.

[0016] As an improvement to the technical solution of the present invention, the first filter element is screwed to the brewing box.

[0017] As an improvement to the technical solution of the present invention, a screwing groove is provided on the inner wall of the brewing box, and a number of protrusions that can be screwed and fixed with the screwing groove are provided on the outer edge of the first filter element.

[0018] As an improvement to the technical solution of the present invention, a horizontally arranged screwing handle is further provided on the first filter element.

[0019] As an improvement to the technical solution of the present invention, the main body further includes a housing, the housing is provided with a connector detachably and sealingly connected to the first opening, and the air extraction inlet of the air extraction device and the air return outlet of the return air pipe are provided on the connector.

[0020] As an improvement to the technical solution of the present invention, the connector protrudes from the housing, the brewing box is provided with a connecting and matching head extending inward from the first opening, the connector is threadedly connected to the connecting and matching head, and a first sealing ring is sleeved on the connector.

[0021] As an improvement to the technical solution of the present invention, a part of the connecting and matching head extends into the brewing cavity, and a liquid storage groove is formed around the connecting and matching head in the brewing cavity.

[0022] As an improvement to the technical solution of the present invention, a second filter element is further included, and the second filter element is detachably provided in the brewing box and is located between the air extraction inlet and the first filter element.

[0023] As an improvement to the technical solution of the present invention, the second filter element is snap-connected to the connecting and matching head.

[0024] As an improvement to the technical solution of the present invention, the second filter element includes a filtering part and a snap-connecting part, the outer edge of the filtering part abuts against the inner wall of the brewing cavity, the snap-connecting part extends upward from the filtering part and is provided with a hook, and the connecting and matching head is provided with a convex ring that cooperates with the hook for fixing.

[0025] As an improvement of the technical solution of the present invention, a pressing part is provided below the first opening of the snap connection part.

[0026] As an improvement of the technical solution of the present invention, a ring of step limiting parts is provided at the upper end of the filtering part in the brewing cavity.

[0027] As an improvement of the technical solution of the present invention, the air extraction outlet is arranged on the lower end surface of the housing. After the connector is connected to the first opening, there is a gap between the lower end surface of the housing and the upper end surface of the brewing box to communicate the air extraction outlet with the atmosphere.

[0028] As an improvement of the technical solution of the present invention, a limiting protrusion is provided on one of the lower end surface of the housing or the upper end surface of the brewing box. After the connector is connected to the first opening, the other of the lower end surface of the housing or the upper end surface of the brewing box abuts against the limiting protrusion.

[0029] As an improvement of the technical solution of the present invention, the housing includes an upper shell and a lower shell. The connection between the upper shell and the lower shell is sealed. The connector is arranged on the lower shell, and the air extraction outlet is arranged on the lower shell.

[0030] As an improvement of the technical solution of the present invention, the cavity formed after the upper shell and the lower shell are connected is communicated with the atmosphere, and the air return inlet is located in the cavity.

[0031] As an improvement of the technical solution of the present invention, the air extraction device is set to start air extraction and stop air extraction after a predetermined duration; the position of the air extraction inlet is higher than the highest liquid level of the liquid entering the brewing cavity within the predetermined duration.

[0032] As an improvement of the technical solution of the present invention, the lower end of the conduit is sealed, and a plurality of through holes are provided on the side wall of the lower end.

[0033] As an improvement of the technical solution of the present invention, a sealing sleeve that envelopes and seals the lower end of the conduit is further included.

[0034] As an improvement of the technical solution of the present invention, the brewing box includes a first box part and a second box part that is detachably and sealingly connected to the first box part. After the first box part and the second box part are sealingly connected, the brewing cavity is formed inside. The first opening is arranged on the first box part, the second opening is arranged on the second box part, and the second box part is integrally connected to the conduit.

[0035] As an improvement of the technical solution of the present invention, the first box part and the second box part are threadedly connected, and a second sealing ring is further provided between the first box part and the second box part.

[0036] As an improvement of the technical solution of the present invention, it further includes a power supply and a control device. The control device is electrically connected to the air extraction device and the control valve, and the power supply is used to supply power to the control device, the air extraction device, and the control valve.

[0037] As an improvement of the technical solution of the present invention, the control device includes a control circuit board and an operation control board. The operation control board, the air extraction device, and the control valve are all electrically connected to the control circuit board.

[0038] As an improvement of the technical solution of the present invention, the power supply is a mobile power supply, and the operation control board is provided with a charging port for charging the power supply.

[0039] As an improvement of the technical solution of the present invention, the operation control board is a touch panel.

[0040] As an improvement of the technical solution of the present invention, the operation control board is provided with a power switch, a working mode switching button, and several working mode indicator lights. Pressing the working mode switching button switches different working modes and the corresponding working mode indicator lights are lit. The soaking set duration corresponding to each working mode is different.

[0041] As an improvement of the technical solution of the present invention, the main body further includes a main air pipe, the main air pipe is arranged in the connector, and the air extraction air inlet and the air return outlet of the air return pipe are communicated with the main air pipe through a three-way joint.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] The portable brewer of the present invention can add beverage preparation materials into the brewing cavity, insert the conduit into a container (such as a water cup), and add liquid (such as water or milk, etc.) into the container. Through the cooperation of the air extraction device and the control valve, the air in the brewing cavity can be extracted (at this time the control valve is closed). Under the action of atmospheric pressure, the liquid in the container is sucked back into the brewing cavity to be mixed with the beverage preparation materials. Then, the air extraction is stopped, the control valve is opened, and the brewing cavity is communicated with the atmosphere through the air return pipe. The liquid in the brewing cavity flows downward back into the container. During this process, the first filter element filters the liquid to prevent solid particles in the beverage preparation materials from entering the container and affecting the taste of the beverage. By continuously controlling the start and stop of the air extraction device and the opening and closing of the control valve, the liquid continuously flows back and forth between the brewing cavity and the container, so that the liquid and the beverage preparation materials are fully mixed, thereby realizing the preparation of the beverage. The overall structure of the present invention is simple, the volume is small, so it is convenient to carry and can be used outdoors, meeting the needs of users to carry and prepare beverages when going out. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following further describes the technology of the present invention in detail in conjunction with the drawings and specific embodiments:

[0045] Figure 1 is a schematic view when the brewing box and the main body of the portable brewer are disassembled;

[0046] Figure 2 is a sectional view when the portable brewer is venting;

[0047] Figure 3 is a sectional view when the portable brewer is evacuating;

[0048] Figure 4 is Figure 3 an enlarged view of part A in

[0049] Figure 5 is a schematic view when the first box part and the second box part are separated;

[0050] Figure 6 is an exploded view of the brewing box;

[0051] Figure 7 is a sectional view of the brewing box and the conduit;

[0052] Figure 8 is a schematic view when the second box part is connected to the conduit;

[0053] Figure 9 is a schematic view of an embodiment of the main body;

[0054] Figure 10 is a schematic view of another embodiment of the main body;

[0055] Figure 11 is Figure 9 a perspective view of the embodiment of the main body;

[0056] Figure 12 is a schematic view of the operation control board;

[0057] Figure 13 is an exploded view of the main body;

[0058] Figure 14 is an axonometric view of the portable brewer.

[0059] Reference numerals:

[0060] 1 - brewing box; 11 - first box part; 111 - first opening; 112 - connecting and mating head; 1121 - convex ring; 113 - liquid storage tank; 114 - step limiting part; 12 - second box part; 121 - second opening; 122 - convex rib; 123 - screwing groove position; 13 - brewing cavity; 14 - gap; 15 - limiting protrusion; 16 - second sealing ring;

[0061] 2 - Main unit; 21 - Housing; 211 - Connector; 212 - First sealing ring; 213 - Upper shell; 214 - Lower shell; 215 - Third sealing ring; 22 - Power supply; 23 - Control device; 231 - Control circuit board; 232 - Operation control board; 2321 - Power switch; 2322 - Working mode switching button; 2323 - Working mode indicator light; 233 - Charging port; 24 - Air extraction device; 241 - Air extraction inlet; 242 - Air extraction outlet; 25 - Return air pipe; 251 - Return air inlet; 252 - Return air outlet; 253 - Control valve; 26 - Main air pipe;

[0062] 3 - First filter element; 31 - Limiting rib; 32 - Protrusion; 33 - Screwing handle position; 4 - Duct; 41 - Through hole; 5 - Second filter element; 51 - Filtering part; 52 - Snap - connection part; 521 - Hook; 53 - Pressing part; 6 - Sealing sleeve; 7 - Container. Detailed implementation manners

[0063] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, solution and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used in the drawings indicate the same or similar parts everywhere.

[0064] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings.

[0065] Refer to Figures 1 to 14 , a portable brewing device, comprising a brewing box 1, a main unit 2, a first filter element 3 and a duct 4.

[0066] Among them, refer to Figures 1 to 8The brewing box 1 is provided with a brewing cavity 13, and the brewing cavity 13 is provided with a first opening 111 and a second opening 121. Solid raw materials required for beverage preparation can be added into the brewing cavity 13, the second opening 121 is used to introduce liquid required for beverage preparation, and the first opening 111 is used for ventilation. In one embodiment, the brewing box 1 includes a first box part 11 and a second box part 12 detachably sealed and connected to the first box part 11, and the brewing cavity 13 is formed inside after the first box part 11 and the second box part 12 are sealed and connected, the first opening 111 is provided in the first box part 11, and the second opening 121 is provided in the second box part 12, and the second box part 12 is integrally connected with the conduit 4. After the first box part 11 and the second box part 12 are separated, the solid raw materials required for beverage preparation can be conveniently added into the brewing cavity 13, and then the two are connected and sealed to avoid leakage when preparing beverages. The first box part 11 can be a main box body, and the second box part 12 can be a box cover. Specifically, the first box part 11 and the second box part 12 are threadedly connected, an external thread is provided on the first box part 11, and an internal thread is provided on the second box part 12. A second sealing ring 16 is also provided between the first box part 11 and the second box part 12 to achieve sealing between the two after the first box part 11 and the second box part 12 are screwed together.

[0067] One end of the conduit 4 is sealedly connected to the second opening 121 . The conduit 4 is hollow, and openings are provided at both ends for liquid to flow in and out.

[0068] The first filter element 3 is detachably disposed in the brewing box 1, and is used to filter the liquid passing through the second opening 121. The first filter element 3 can be a filter screen, filter paper, or filter cloth.

[0069] Among them, refer to Figures 1 to 3 , Figures 9 to 13 The host 2 includes an air suction device 24 and an air return pipe 25. The air suction inlet 241 of the air suction device 24 is connected to the brewing chamber 13, and is used to extract the air in the brewing chamber 13. The air suction outlet 242 of the air suction device 24 is connected to the atmosphere. The air suction device 24 can be an air pump; the air return inlet 251 of the air return pipe 25 is connected to the atmosphere, and the air return outlet 252 of the air return pipe 25 is connected to the brewing chamber 13. The air return pipe 25 is provided with a control valve 253 for controlling its own connection and disconnection. The control valve 253 can be a solenoid valve. In actual use, when the air suction device 24 is pumping air, the control valve 253 is closed. When the air suction stops pumping, the control valve 253 is selected to open and connect immediately or continue to close for a period of time before opening and connecting according to the specific preparation situation.

[0070] Among them, refer to Figure 2 and Figure 3, when making a brewed beverage, the first opening 111 is higher than the second opening 121. The other end of the conduit 4 is inserted into a container 7 (such as a water cup) and immersed below the liquid level in the container 7. The interior of the container 7 is in communication with the atmosphere. In this way, by controlling the air pressure in the brewing chamber 13, with the aid of the atmospheric pressure, the liquid in the container 7 can be pressed into the brewing chamber 13 to be mixed with the raw materials in the brewing chamber 13 and the liquid in the brewing chamber 13 can flow back into the container 7.

[0071] Based on the above structure, the overall structure of the present invention is simple and its volume is small, thus facilitating portability and meeting the needs of users to carry and prepare beverages when going out. The following briefly describes the usage process of this portable brewer:

[0072] 1) Prepare the raw materials required for making a brewed beverage, find a container 7 (usually there are water cups in a room), and add the liquid required for making a brewed beverage (such as water, milk or other liquids) into the container 7.

[0073] 2) Put the raw materials into the brewing chamber 13, connect this portable brewer, and start brewing.

[0074] 3) The air extraction device 24 starts air extraction and maintains the air extraction for a predetermined duration (at this time, the control valve 253 is closed). The air in the brewing chamber 13 is extracted and the air pressure becomes smaller. Under the action of the atmospheric pressure, the liquid in the container 7 is sucked back into the brewing chamber 13 to be mixed with the beverage preparation materials. After the predetermined duration, the air extraction device 24 stops air extraction. According to the specific requirements of beverage preparation, the control valve 253 is opened or maintained closed for a period of time and then opened. Then, the return air pipe 25 connects the brewing chamber 13 with the atmosphere, and the liquid in the brewing chamber 13 flows back into the container 7. When flowing back, the liquid passes through the first filter element 3, and the undissolved lumpy raw materials are filtered and remain in the brewing chamber 13.

[0075] 4) Repeat the operation in 3) several times until the beverage preparation is completed.

[0076] Among them, referring to Figure 8 , a plurality of convex ribs 122 are provided on the lower surface of the brewing box 1. When making a brewed beverage, the brewing box 1 is placed on the upper opening of the container 7, and the convex ribs 122 are in contact with the opening of the container 7. An air vent gap is formed between two adjacent convex ribs 122. The air vent gap connects the interior of the container 7 with the atmosphere. By providing the convex ribs 122, it is ensured that when the brewing box 1 makes a brewed beverage, an air vent gap is formed at the upper opening of the container 7, so as to ensure the connection between the interior of the container 7 and the atmosphere and avoid affecting the inflow of the liquid into the brewing chamber 13 or the outflow from the brewing chamber 13.

[0077] In one embodiment, referring to Figures 1 to 8, the lower end of the brewing box 1 is in a funnel shape, and the first filter element 3 is also in a funnel shape. Their shapes match, which is convenient for installation. The funnel-shaped first filter element 3 can also facilitate the filtration of liquid.

[0078] Preferably, referring to Figure 6 , a plurality of limiting ribs 31 are provided between the lower surface of the first filter element 3 and the inner wall of the funnel shape of the brewing box 1. A liquid passage gap is formed between adjacent limiting ribs 31. Since the lower end of the brewing box 1 and the first filter element 3 are both in a funnel shape, if the two are completely fitted, the inner wall of the lower end of the brewing box 1 will block the first filter element 3, thus affecting the filtration efficiency. Therefore, the limiting ribs 31 are provided to form a liquid passage gap to facilitate the liquid to pass through the first filter element 3. Among them, the limiting ribs 31 are provided on the lower surface of the first filter element 3 or on the inner wall of the funnel shape of the brewing box 1. In one embodiment, the limiting ribs 31 are provided on the lower surface of the first filter element 3.

[0079] Among them, referring to Figure 6 , for the convenience of installation and disassembly of the first filter element 3, the first filter element 3 is screwed to the brewing box 1. Specifically, a screwing groove 123 is provided on the inner wall of the brewing box 1, and the outer edge of the first filter element 3 is provided with a plurality of protrusions 32 that can be screwed and fixed to the screwing groove 123. Through the cooperation of the screwing groove 123 and the protrusions 32, the first filter element 3 can be screwed into the brewing box 1. Similarly, when it is necessary to disassemble, clean or replace the first filter element 3, the protrusions 32 are disengaged from the screwing groove 123 by screwing, and the first filter element 3 and the brewing box 1 are separated. Screwing and fixing the first filter element 3 and the brewing box 1 can prevent the first filter element 3 from falling into the trash can when pouring out the remaining solid raw materials.

[0080] Preferably, referring to Figure 6 , for the convenience of rotating the first filter element 3 for installation and disassembly, a horizontally arranged screwing handle 33 is further provided on the first filter element 3. The screwing handle 33 is a horizontally arranged cross bar, and both ends are fixedly connected to the first filter element 3. When disassembling, pinch the screwing handle 33 with fingers and rotate it to disassemble the first filter element 3. The installation is the same.

[0081] The main machine 2 further includes a machine shell 21. The machine shell 21 is provided with a connector 211 that is detachably and hermetically connected to the first opening 111. The air extraction inlet 241 of the air extraction device 24 and the air return outlet 252 of the air return pipe 25 are arranged on the connector 211. The main machine 2 and the brewing box 1 are detachably connected through the connector 211, which is convenient for disassembly, cleaning and assembly.

[0082] Among them, referring to Figures 1 to 6The connector 211 protrudes from the housing 21. The brewing box 1 is provided with a connecting and mating head 112 extending inward from the first opening 111. The connector 211 is threadedly connected to the connecting and mating head 112, and a first sealing ring 212 is sleeved on the connector 211. External threads are provided on the connector 211, and a threaded hole is provided on the connecting and mating head 112 with internal threads for screwing and fixing with the connector 211. After fixing, the first sealing ring 212 is clamped between the housing 21 and the brewing box 1 to seal the connection between the two.

[0083] Preferably, referring to Figure 3 , a part of the connecting and mating head 112 extends into the brewing chamber 13, and a liquid storage groove 113 is formed around the connecting and mating head 112 in the brewing chamber 13. The setting of the liquid storage groove 113 enables that after brewing is completed and the beverage is poured out, when the brewing box 1 is inverted (the other end of the brewing box 1 is connected to the conduit 4 and cannot be placed stably), the residual beverage in the brewing chamber 13 will collect in the liquid storage groove 113 instead of directly entering the air inlet of the air extraction device 24 on the connector 211 and the air outlet of the air return device through the threaded hole of the connecting and mating head 112, thus causing dirt inside the main unit 2.

[0084] Preferably, referring to Figure 3 , Figure 6 , the portable brewer further includes a second filter element 5. The second filter element 5 is detachably arranged in the brewing box 1 and is located between the air extraction air inlet 241 and the first filter element 3. The second filter element 5 is arranged at the upper end, and cooperating with the first filter element 3, it can limit the solid raw materials between the second filter element 5 and the first filter element 3, avoiding the situation that when the liquid level in the brewing box 1 rises, the solid raw materials enter the air extraction air inlet 241 along with the liquid, causing blockage. In one embodiment, the second filter element 5 is snap-connected to the connecting and mating head 112, which is convenient for installation, disassembly and cleaning.

[0085] Specifically, referring to Figure 6, the second filter element 5 includes a filtering portion 51 and a snap connection portion 52. The outer edge of the filtering portion 51 abuts against the inner wall of the brewing chamber 13. The snap connection portion 52 extends upward from the filtering portion 51 and is provided with a hook 521. The connecting and mating head 112 is provided with a convex ring 1121 that cooperates with the hook 521 for fixation. That is, through the cooperation of the hook 521 and the convex ring 1121, the second filter element 5 can be connected and fixed to the brewing box 1, preventing the second filter element 5 from falling off into the trash can when pouring out the remaining solid raw materials. The filtering portion 51 has a circular shape, and correspondingly, the cross-sectional shape of the brewing chamber 13 at its installation location is also circular. The shapes of the two match to avoid leaving a gap 14 that would allow the solid raw materials to bypass the second filter element 5 and enter the air intake port 241. The filtering portion 51 of the second filter element 5 is a filter screen, filter paper, or filter cloth. To facilitate the removal of the second filter element 5, the snap connection portion 52 is provided with a pressing portion 53 below the first opening 111. Thus, when removal is required, the user's finger can extend through the first opening 111, press the pressing portion 53, and separate the hook 521 from the convex ring 1121 to achieve the removal of the second filtering portion 51.

[0086] Among them, referring to Figure 3 , a stepped limiting portion 114 is provided at the upper end of the filtering portion 51 in the brewing chamber 13. The stepped limiting portion 114 limits the second filter element 5 and cooperates with the hook 521 to achieve fixation.

[0087] Among them, referring to Figure 3 、 Figures 9 to 11 , the air extraction outlet 242 is provided on the lower end surface of the housing 21 to hide the outlet, making the overall portable brewing device more aesthetically pleasing. After the connecting head 211 is connected to the first opening 111, there is a gap 14 between the lower end surface of the housing 21 and the upper end surface of the brewing box 1 to communicate the air extraction outlet 242 with the atmosphere. By maintaining the connection, the air in the brewing chamber 13 can be extracted by the air extraction device 24 to reduce the air pressure in the brewing chamber 13. Specifically, one of the lower end surface of the housing 21 or the upper end surface of the brewing box 1 is provided with a limiting protrusion 15. After the connecting head 211 is connected to the first opening 111, the other of the lower end surface of the housing 21 or the upper end surface of the brewing box 1 abuts against the limiting protrusion 15. Through the setting of the limiting protrusion 15, a gap 14 can be formed after the housing 21 and the brewing box 1 are connected, maintaining the communication between the air extraction outlet 242 and the atmosphere.

[0088] Among them, the casing 21 includes an upper shell 213 and a lower shell 214. The connection between the upper shell 213 and the lower shell 214 is sealed. The connector 211 is provided on the lower shell 214, and the air extraction and outlet port 242 is provided on the lower shell 214. The connection between the upper shell 213 and the lower shell 214 is sealed by a third sealing ring 215. During cleaning, the lower end of the main machine 2 can be immersed in clean water without worrying about water entering the main machine 2 for cleaning. At the same time, the air extraction device 24 is started to suck and discharge the clean water, thereby cleaning the air pipe of the air extraction device 24.

[0089] Preferably, the cavity formed after the upper shell 213 and the lower shell 214 are connected is in communication with the atmosphere. The air return inlet 251 is located in the cavity, that is, the inside of the main machine 2 is not sealed. The air return pipe 25 can maintain communication with the atmosphere in the cavity, so there is no need to set an air inlet for the air return pipe 25 on the casing 21, reducing external holes and making the overall main machine 2 more beautiful.

[0090] Specifically, the air extraction device 24 is set to start air extraction and stop air extraction after a predetermined duration; the position of the air extraction inlet 241 is higher than the highest liquid level of the liquid entering the brewing chamber 13 within the predetermined duration. With such a setting, it is possible to avoid excessive liquid entering the brewing box 1 resulting in too high a liquid level and soaking the air inlet of the air extraction device 24, causing the liquid to be sucked and discharged by the air extraction device 24. Then, this portable brewing device does not need to be provided with a liquid level sensor, and only by controlling the continuous duration of the air extraction of the air extraction device 24, it is possible to avoid the liquid being sucked and discharged by the air extraction device 24.

[0091] In actual use, the inventor found that if the lower end opening of the conduit 4 is downward (i.e., when the conduit 4 is vertically through), after the beverage is prepared, the beverage cannot be mixed evenly but will form upper and lower layers. To solve this problem, the inventor improved the conduit 4. Refer to Figures 1 to 8 , the lower end of the conduit 4 is blocked and several through holes 41 are provided on the side wall of the lower end. By providing the through holes 41 on the side wall, the beverage enters and exits through the through holes 41 on the side wall, which can greatly improve the problem of beverage stratification.

[0092] Since there will be residual beverage in the brewing chamber 13 after the beverage is prepared, if it cannot be cleaned in time, it may flow out from the conduit 4 and dirty the backpack. To solve this problem, refer to Figure 6 and Figure 14 , this portable brewing device further includes a sealing sleeve 6 that envelopes and seals the lower end of the conduit 4, so as to avoid the residual beverage from flowing out and can be cleaned at a convenient time. At the other end, due to the setting of the liquid storage tank 113, the residual beverage cannot flow out from the first opening 111.

[0093] Among them, refer to Figure 13, the control device 23 is electrically connected to the air extraction device 24 and the control valve 253, and the power supply 22 is used to supply power to the control device 23, the air extraction device 24, and the control valve 253. In one embodiment, the power supply 22 is a mobile power supply, preferably a lithium battery. The power supply 22, the control device 23, and the air extraction device 24 are located inside the housing 21. The air extraction outlet 242 of the air extraction device 24 is provided on the housing 21. The power supply 22, the control device 23, and the air extraction device 24 are located inside the housing 21. The control device 23 includes a control circuit board 231 and an operation control board 232. The operation control board 232, the air extraction device 24, and the control valve 253 are all electrically connected to the control circuit board 231. The power supply 22 is a mobile power supply, and the operation control board 232 is provided with a charging port 233 for charging the power supply 22. Operations can be performed through the control panel to start the control programs of the air extraction device 24 and the control valve 253 pre-stored in the control circuit board 231.

[0094] In one embodiment, the operation control board 232 is a touch panel.

[0095] In one embodiment, referring to Figure 12 , the operation control board 232 is provided with a power switch 2321, a working mode switching button 2322, and several working mode indicator lights 2323. Pressing the working mode switching button 2322 switches different working modes and the corresponding working mode indicator lights 2323 are lit. The soaking set duration corresponding to each working mode is different. The soaking duration is the duration that the control valve 253 continues to maintain the closed state after the air extraction stops, to ensure the soaking of the liquid and solid raw materials in the brewing chamber 13. Different soaking durations are provided in different modes. The working modes include the milk tea brewing mode, the tea brewing mode, and the coffee brewing mode. The soaking time for the milk tea brewing mode is 20 seconds each time, the soaking time for the tea brewing mode is 10 seconds each time, and the soaking time for the coffee brewing mode is 0 seconds, that is, when the air pump stops extracting air, the control valve 253 immediately opens. In addition, a thickening button is also provided. After pressing the thickening button, the soaking duration in this mode is extended, for example, extended by 10 seconds. That is, after pressing the thickening button in the milk tea brewing mode, the soaking time is 30 seconds each time.

[0096] Preferably, as Figure 10As shown, the host 2 further includes a main air pipe 26, which is arranged inside the connector 211. The air extraction inlet 241 and the air return outlet 252 are communicated with the main air pipe 26 through a tee joint. That is, the air inlet of the air extraction device 24 and the air outlet of the air return pipe 25 are connected to the same pipe, and there is only one pipe connection with the brewing chamber 13, further reducing the probability of the liquid in the brewing chamber 13 entering the host 2. At the same time, with such an arrangement, the number of holes on the host 2 is smaller and it is more beautiful. Also, when the lower end of the host 2 is immersed in clean water for cleaning, the air return pipe 25 can be cleaned incidentally.

[0097] For other contents of the portable brewer of the present invention, reference can be made to the prior art and will not be elaborated here.

[0098] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Therefore, any modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A portable brewer, characterized in that, Comprising: A brewing box, the brewing box is provided with a brewing cavity, and the brewing cavity is provided with a first opening and a second opening; A main body, including an air extraction device and a return air pipe, the air extraction inlet of the air extraction device is communicated with the brewing cavity for extracting the air in the brewing cavity, and the air extraction outlet of the air extraction device is communicated with the atmosphere; the return air inlet of the return air pipe is communicated with the atmosphere, the return air outlet of the return air pipe is communicated with the brewing cavity, and a control valve for controlling its own connection and disconnection is provided on the return air pipe; A first filter element, detachably arranged in the brewing box for filtering the liquid passing through the second opening; And A conduit, one end of which is hermetically connected to the second opening; Wherein, when brewing a beverage, the first opening is higher than the second opening, the other end of the conduit is inserted into a container and immersed below the liquid level in the container, and the inside of the container is communicated with the atmosphere; the lower surface of the brewing box is provided with a plurality of convex ribs. When brewing a beverage, the brewing box is placed on the upper opening of the container, and the convex ribs are abutted against the opening of the container. An air ventilation gap is formed between two adjacent convex ribs, and the air ventilation gap communicates the inside of the container with the atmosphere; the lower end of the brewing box is in a funnel shape, and the first filter element is also in a funnel shape; a plurality of limiting convex ribs are provided between the lower surface of the first filter element and the inner wall of the funnel-shaped brewing box, and a liquid passing gap is formed between adjacent limiting convex ribs.

2. The portable brewing device according to claim 1, wherein: The limiting convex ribs are arranged on the lower surface of the first filter element or on the inner wall of the funnel-shaped brewing box of the brewing box.

3. The portable brewing device according to claim 1, characterized in that: The first filter element is screwed to the brewing box.

4. The portable brewer according to claim 3, wherein: The inner wall of the brewing box is provided with a screwing groove position, and the outer edge of the first filter element is provided with a plurality of convex blocks that can be screwed and fixed with the screwing groove position.

5. The portable brewer according to claim 3, wherein: The first filter element is also provided with a horizontally arranged screwing handle position.

6. The portable brewer according to claim 1, wherein: The main body further includes a housing, the housing is provided with a connector detachably and hermetically connected to the first opening, and the air extraction inlet of the air extraction device and the return air outlet of the return air pipe are arranged on the connector.

7. The portable brewer according to claim 6, wherein: The connector protrudes on the housing, the brewing box is provided with a connecting and mating head extending inward from the first opening, the connector is threadedly connected to the connecting and mating head, and a first sealing ring is sleeved on the connector.

8. The portable brewing device according to claim 7, wherein: The connecting and mating head partially extends into the brewing cavity, and a liquid storage groove is formed around the connecting and mating head in the brewing cavity.

9. The portable brewer according to claim 7, wherein: It further includes a second filter element, the second filter element is detachably arranged in the brewing box and is located between the air extraction inlet and the first filter element.

10. The portable brewer according to claim 9, wherein: The second filter element is snap-connected to the connecting and mating head.

11. The portable brewer according to claim 10, wherein: The second filter element includes a filtering part and a snap-connecting part, the outer edge of the filtering part abuts against the inner wall of the brewing cavity, the snap-connecting part extends upward from the filtering part and is provided with a hook, and the connecting and mating head is provided with a convex ring that cooperates with the hook for fixing.

12. The portable brewing device according to claim 11, wherein: The snap-connecting part is provided with a pressing part below the first opening.

13. The portable brewer according to claim 11, wherein: A circle of step limiting parts is provided at the upper end of the filtering part in the brewing cavity.

14. The portable brewer according to claim 6, wherein: The air extraction outlet is arranged on the lower end surface of the casing. After the connector is connected to the first opening, there is a gap between the lower end surface of the casing and the upper end surface of the brewing box to communicate the air extraction outlet with the atmosphere.

15. The portable brewing device according to claim 14, wherein: One of the lower end surface of the casing or the upper end surface of the brewing box is provided with a limiting protrusion. After the connector is connected to the first opening, the other of the lower end surface of the casing or the upper end surface of the brewing box abuts against the limiting protrusion.

16. The portable brewer according to claim 6, wherein: The casing includes an upper shell and a lower shell. The connection part between the upper shell and the lower shell is sealed. The connector is arranged on the lower shell, and the air extraction outlet is arranged on the lower shell.

17. The portable brewing device according to claim 16, wherein: The cavity formed after the upper shell and the lower shell are connected is communicated with the atmosphere, and the air return inlet is located in the cavity.

18. The portable brewer according to claim 1, wherein: The air extraction device is set to start air extraction and stop air extraction after a predetermined duration; the position of the air extraction inlet is higher than the highest liquid level of the liquid entering the brewing cavity within the predetermined duration.

19. The portable brewer according to claim 1, wherein: The lower end of the conduit is sealed, and a plurality of through holes are provided on the side wall of the lower end.

20. The portable brewing device according to claim 1, wherein: It further includes a sealing sleeve that envelopes and seals the lower end of the conduit.

21. The portable brewer according to any one of claims 1-20, characterized in that: The brewing box includes a first box part and a second box part that is detachably and sealingly connected to the first box part. After the first box part and the second box part are sealingly connected, a brewing cavity is formed inside. The first opening is arranged on the first box part, the second opening is arranged on the second box part, and the second box part is integrally connected to the conduit.

22. The portable brewer according to claim 21, wherein: The first box part and the second box part are threadedly connected, and a second sealing ring is further provided between the first box part and the second box part.

23. The portable brewer according to any one of claims 1-20, characterized in that: It further includes a power supply and a control device. The control device is electrically connected to the air extraction device and the control valve. The power supply is used to supply power to the control device, the air extraction device, and the control valve.

24. The portable brewer according to claim 23, wherein: The control device includes a control circuit board and an operation control board. The operation control board, the air extraction device, and the control valve are all electrically connected to the control circuit board.

25. The portable brewer according to claim 24, wherein: The power supply is a mobile power supply, and the operation control board is provided with a charging port for charging the power supply.

26. The portable brewer according to claim 24, wherein: The operation control board is a touch panel.

27. The portable brewing device according to claim 24, characterized in that: The operation control board is provided with a power switch, a working mode switching button, and a plurality of working mode indicator lights. Press the working mode switching button to switch different working modes and the corresponding working mode indicator lights are lit. The soaking set duration corresponding to each working mode is different.

28. The portable brewer according to any one of claims 6-20, characterized in that: The main machine further includes a main air pipe. The main air pipe is arranged inside the connector. The air extraction inlet and the air return outlet of the air return pipe are communicated with the main air pipe through a three-way joint.

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