Coffee machine
By employing a rotating extraction head and a circulating path design in the coffee machine, the problem of low extraction efficiency in existing coffee machines has been solved, enabling efficient and portable coffee making and enhancing the richness of the coffee.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LIU DANPING
- Filing Date
- 2026-01-07
- Publication Date
- 2026-07-16
AI Technical Summary
Existing coffee machines have low extraction efficiency, insufficient wetting and dissolution, and the piercing structure of the extraction head has insufficient piercing force, making it difficult to effectively extract coffee from large capsules. They are also not suitable for swivel-type coffee capsule loading.
A coffee machine was designed with a rotating extraction head. A hollow needle forms a circulation path inside the coffee capsule. Water is sprayed through the water injection hole of the hollow needle and flows along the inner ring wall of the coffee capsule. Combined with the sharp needle piercing the bottom wall to form a central liquid outlet hole, efficient extraction is achieved.
It improves the extraction efficiency and effect of coffee powder, enhances the richness of coffee liquid, has a simple and portable structure, is suitable for portable use, and makes the extraction process more efficient.
Smart Images
Figure CN2026071231_16072026_PF_FP_ABST
Abstract
Description
A coffee machine Technical Field
[0001] This application relates to the field of coffee machine technology, and more particularly to a portable coffee machine. Background Technology
[0002] Coffee, a signature beverage of modern lifestyle, is most commonly consumed freshly brewed at physical coffee shops or made using capsule coffee machines. A coffee capsule is an aluminum shell containing ground coffee powder, typically available in large and small sizes. By inserting the capsule into a capsule coffee machine, a cup of aromatic coffee can be made instantly, offering great convenience. In existing coffee machines using capsules, water enters through the extraction head's inlet, flowing from top to bottom, wetting, dissolving, and extracting the coffee powder. The coffee then flows out from the bottom of the capsule. However, during extraction, the water flow is primarily downwards along the capsule's height, resulting in a short extraction time, insufficient wetting and dissolving, low extraction efficiency, and a coffee concentration that doesn't meet expectations. On the other hand, in existing coffee machines or coffee-making equipment, the coffee capsule is placed into the extraction chamber of the extraction head. The bottom wall of the extraction chamber has a piercing structure to pierce the aluminum shell of the coffee capsule so that coffee can flow out. However, the piercing structure of existing extraction heads has the problem of low piercing force, resulting in burrs in the piercing holes or failure to pierce the aluminum shell of the coffee capsule, especially with larger capsules, severely affecting the coffee output. Furthermore, the structure of the extraction head in existing coffee machines or coffee-making equipment is not suitable for the screw-loading method of coffee capsules. Summary of the Invention
[0003] The purpose of this application is to provide a coffee machine that solves the problem of extraction effect in existing coffee making equipment.
[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: A coffee machine, comprising a main body and an extraction head, wherein the main body is provided with an extraction head mounting part, and the extraction head is detachably mounted on the mounting part; the main body is used to supply water to the extraction head for coffee making, the extraction head is provided with an extraction chamber for placing coffee capsules or coffee powder containers, the extraction head is provided with a water inlet and a liquid outlet communicating with the extraction chamber, the extraction head includes a hollow needle, and the side wall of the needle tip of the hollow needle is provided with several water injection holes; the water inlet is provided at the center of the top of the extraction chamber, and the hollow needle can pass through the water inlet and its needle tip pierces the top of the coffee capsule or coffee powder container in the extraction chamber. The hollow needle can be connected to the water outlet of the main body mounting part, and water is sprayed from the top of the coffee capsule or coffee powder container in the extraction chamber into the arc-shaped side wall of the coffee capsule or coffee powder container through its water injection hole; a pointed needle with a pointed cone head is provided at the center of the bottom wall of the extraction chamber to pierce the bottom wall of the coffee capsule or coffee powder container to form a central liquid outlet hole; during coffee extraction, the water sprayed from the water injection hole of the hollow needle flows through the arc-shaped side wall of the coffee capsule or coffee powder container, flows to the edge of the bottom wall of the coffee capsule or coffee powder container, and then flows through the wall surface of the bottom wall of the coffee capsule or coffee powder container to the central liquid outlet hole, forming a circulation path.
[0005] In some embodiments, the hollow needle is installed on the extraction head mounting part of the main body, or fixed in the water inlet hole at the top of the extraction head.
[0006] In some embodiments, the extraction head is a rotating body, including a base and a coffee chamber, which are mutually adapted rotating bodies; the top of the coffee chamber contains an extraction cavity for placing coffee capsules or coffee powder, and the bottom is connected to the base; the water inlet is provided at the center of the top of the coffee chamber, and the liquid outlet is provided at the center of the base; the needle and a filter assembly are installed at the center of the base and located above the liquid outlet.
[0007] In some embodiments, the needle is a steel nail structure, including a pointed cone head for piercing the bottom wall of a coffee capsule or coffee powder container and a connecting rod for connecting to the liquid outlet hole; the filter assembly is a cylindrical mesh structure, sleeved outside the connecting rod of the needle and abutting against the edge of the liquid outlet hole; a gap exists between the filter assembly and the needle to form a liquid outlet channel; the liquid outlet channel communicates with the liquid outlet hole; a gap exists between the connecting rod at the bottom of the needle and the inner wall of the liquid outlet hole to allow coffee liquid to flow out; the extracted coffee liquid is filtered by the filter assembly and flows into the liquid outlet channel, then into the liquid outlet hole, and finally flows out for the user to use.
[0008] In some embodiments, the base and the coffee compartment can be connected by threads, with the outer rotating wall of the base having external threads and the inner rotating wall of the bottom of the coffee compartment having internal threads; the base and the coffee compartment are assembled or separated by a press-and-spin method: after alignment, the base and the coffee compartment are rotated relative to each other, and after rotation into place, assembly is achieved, the coffee capsule is pressed into the extraction head, and the needle in the center of the base only pierces the center of the bottom wall of the capsule or coffee powder compartment, and the needle can rotate in both directions relative to the perforation in the center of the bottom wall without damaging the coffee capsule or causing coffee powder to scatter; the base or coffee compartment is separated by rotating in the opposite direction.
[0009] In some embodiments, the main body of the coffee machine includes an upper housing, a lower housing, and an extraction head detachably disposed on the upper housing. The upper housing is rotatably disposed on top of the lower housing, and the bottom of the upper housing has a mounting cavity. The extraction head is detachably connected to the mounting cavity. The extraction head includes a hollow needle, a base detachably connected to each other, and a coffee chamber. The coffee chamber has an extraction cavity with a through hole. The pointed end of the hollow needle passes through the through hole and is located in the extraction cavity. The connecting end of the hollow needle is connected to the mounting cavity. The base has a liquid outlet through hole and a liquid outlet connection seat communicating with the liquid outlet through hole. The liquid outlet connection seat has a pointed needle and a filter assembly. The filter assembly is sleeved on the connecting end of the pointed needle, and a gap is provided between the filter assembly and the connecting end of the pointed needle to form a liquid outlet channel.
[0010] As a further embodiment of this application, the center of the liquid outlet connector is provided with a groove, the groove is provided with a liquid outlet hole communicating with the liquid outlet through hole, a connector is provided in the liquid outlet hole, the connector has an internal thread hole; the connecting end of the needle is provided with an external thread matching the internal thread hole, and the periphery of the connecting end of the needle is provided with at least one flat surface laterally, the connector and the connecting end of the needle are connected to each other so that a gap is formed between the flat surface and the internal thread hole.
[0011] As a further embodiment of this application, the lower housing is provided with a mounting bracket, a heat dissipation device, a water pump, a rechargeable battery, and a first control circuit board. The water pump and the rechargeable battery are respectively connected to the first control circuit board. The mounting cavity is also provided with a water outlet connector. The water outlet end of the water pump is connected to one end of the water outlet connector through a water pipe. The other end of the water outlet connector is connected to the connecting end of the hollow needle. Water injection holes are provided on both sides of the pointed end of the hollow needle.
[0012] As a further embodiment of this application, the top end of the lower housing is provided with a water tank for placing the extraction head, and the water tank is connected to the water pump via a water pipe; the top of the lower housing is provided with a water tank mounting groove and a rotating groove, and a limiting mounting seat is provided inside the lower housing below the rotating groove, and the water tank is disposed in the water tank mounting groove; the other end of the bottom of the upper housing extends with a hollow connecting part, and a limiting groove is provided inside the hollow connecting part, and a limiting baffle is provided in the limiting groove; the hollow connecting part extends into the rotating groove and the limiting mounting seat and the limiting baffle are locked together by fasteners, so that the upper housing can be rotated horizontally relative to the lower housing to adjust the angle; the extraction head is installed in the mounting cavity; when not in use, the extraction head is removed and placed in the water tank, and the upper housing is rotated horizontally back to the initial position.
[0013] As a further embodiment of this application, the surface of the rotating groove is provided with a plurality of equidistant annular hemispherical cavities and bosses, and the surface of the bosses is provided with semi-circular cavities; the bottom of the upper shell is provided with a semi-annular groove near the hollow connecting part, and one end of the semi-annular groove is provided with a raised hemisphere that mates with the hemispherical cavity, and the raised hemisphere is adapted to any one of the hemispherical cavities.
[0014] As a further embodiment of this application, a heating plate is provided at the bottom of the water tank, the heating plate is electrically connected to the first control circuit board, the heating plate is provided with a temperature sensor, and the temperature sensor is electrically connected to the heating plate; a removable cover is provided at the top of the water tank, and a water outlet and a mounting hole are provided at the bottom of the water tank. The water outlet is connected to the water inlet of the water pump through a water pipe, and the temperature sensor is located in the mounting hole.
[0015] As a further embodiment of this application, the coffee compartment is further provided with a powder container for holding coffee powder. The powder container includes a powder box and a powder cover fastened to the powder box. The powder cover has an opening. The powder box has a powder cavity with an opening at the top. The bottom surface of the powder cavity has a powder cavity opening at the center. The powder container is placed in the extraction chamber. The needle and the filter assembly pass through the powder cavity opening and are located in the powder cavity. The pointed end of the hollow needle passes through the through hole and the opening in sequence and is located in the powder cavity.
[0016] In a further embodiment of this application, a second control circuit board and a switch guide post are provided inside the upper housing. The first control circuit board is electrically connected to the second control circuit board, and a spring is sleeved on the switch guide post. A placement slot is provided inside the upper housing near the protruding hemisphere, and the switch guide post is placed in the placement slot. A limit switch module is provided on the second control circuit board. One end of the switch guide post abuts against the limit switch module, and the other end of the switch guide post is adapted to the semi-circular cavity. When one end of the switch guide post is located in the semi-circular cavity on the protrusion, the other end of the switch guide post moves away from the limit switch module. When one end of the switch guide post moves away from the semi-circular cavity, the other end of the switch guide post touches the limit switch module by being compressed and raised by the spring.
[0017] As a further embodiment of this application, a sealing ring is provided between the base and the coffee compartment.
[0018] As a further embodiment of this application, the filter assembly has a porous structure or a slit structure.
[0019] The beneficial effects of this application are as follows: In the coffee machine of this application, the upper housing is rotatably mounted on top of the lower housing, allowing the upper housing to rotate horizontally 180 degrees relative to the lower housing. The extraction head is then installed in the mounting cavity of the upper housing to extract coffee. When making coffee, the coffee capsule can typically have a single capsule capacity of 10-15 grams, extracting 150-500 ml of coffee liquid, or a single capsule capacity of 5-8 grams, with an extraction volume concentrated in 25-50 ml. After placing the coffee capsule in the extraction cavity of the extraction head, the base and the coffee cavity are connected. Simultaneously, the pointed end of the needle on the base pierces into the coffee capsule from the center of the bottom, so that the pointed end of the needle and the filter assembly are located inside the coffee capsule, and the pointed end of the hollow needle pierces into the coffee capsule placed in the extraction cavity of the extraction head. The top center of the capsule is located inside the coffee capsule. When the brewing process is started, hot water flows from the water tank into the hollow needle via the water pump. High-pressure water is then sprayed horizontally from the water inlets on both sides of the hollow needle to the inner ring wall of the coffee capsule, forming a circulation. The water flows along the inner ring wall of the coffee capsule to the filter assembly at the bottom center. The filtered coffee liquid then flows out through the outlet channel, achieving high-pressure extraction. The water flow path time during the circulation extraction process is approximately twice that of a normal direct current path, thus fully saturating and extracting the coffee powder inside the capsule, greatly improving the extraction efficiency and effect. Therefore, the coffee machine provided by this application has a simple overall structure and a small size, making it easy for users to store and carry, meeting the user's need to drink coffee anytime, anywhere. It can automatically generate high-pressure water when brewing coffee, producing a rich aroma. The rotating upper shell design allows the coffee cup to be placed directly on the table during coffee making, making it even more convenient to use. Attached Figure Description
[0020] Figure 1 is a schematic diagram of the overall structure of the coffee machine provided in the embodiment of this application.
[0021] Figure 2 is a schematic diagram of the overall structure of the coffee machine provided in the embodiment of this application.
[0022] Figure 3 is a schematic diagram of the extraction head of the coffee machine provided in the embodiment of this application.
[0023] Figure 4 is a schematic diagram of the extraction head of the coffee machine provided in the embodiment of this application.
[0024] Figure 5 is a cross-sectional view of the extraction head of the coffee machine provided in an embodiment of this application.
[0025] Figure 6 is a schematic diagram of the filter assembly of the coffee machine provided in the embodiment of this application being fitted onto the needle.
[0026] Figure 7 is an exploded view of the upper housing of the coffee machine provided in the embodiment of this application.
[0027] Figure 8 is an overall schematic diagram of the upper casing of the coffee machine provided in the embodiment of this application.
[0028] Figure 9 is a cross-sectional view of the overall structure of the coffee machine provided in the embodiment of this application.
[0029] Figure 10 is a schematic diagram of the coffee machine provided in the embodiments of this application in its unfolded, rotated, and stowed states. Detailed Implementation
[0030] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.
[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0032] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the elements, components, regions, layers, or segments discussed below may be referred to as second elements, components, regions, layers, or segments without departing from the teachings of the exemplary embodiments.
[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "rear," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0035] This application relates to a coffee machine, which can be manual, electric, or semi-automatic, comprising a main body and an extraction head installed on the main body. Referring to Figures 1-10, the main body of the coffee machine is used to supply water (usually hot water, but cold water can also be supplied) to the extraction head 300. The main body can also be used to supply high-pressure water to the extraction head 300. Therefore, a heating device 261, a water tank 260, a water pipe 500, and a water pump 230 can be installed in the main body. The heating device 261 is used to heat the water tank 260 (specifically, the water inside the water tank 260). The water tank 260 is connected to the water pump 230 via a water circuit. The water pipe 500 connects the water pump 230 and the extraction head 300. After the water in the water tank 260 is heated to hot water, it flows into the water pump 230 and is then transported to the extraction head 300 by the water pipe 500 for coffee extraction. The main body is provided with a mounting part for mounting the extraction head 300, such as a mounting cavity 110. The extraction head 300 is detachably mounted in the mounting part (i.e., inside the mounting cavity 110). It can be installed by means of threaded connection, in which the extraction head 300 is rotated into the mounting part (i.e., inside the mounting cavity 110) during operation; it can also be installed by means of snap-fit, such as a protrusion / groove, in which the extraction head 300 is installed in the mounting part (i.e., inside the mounting cavity 110) and snapped together; or it can be installed in the mounting part (i.e., inside the mounting cavity 110) by means of fasteners and fixed by fasteners.
[0036] It is understood that the main body of the coffee machine is sufficient to house the extraction head 300 and supply hot water to it; its structural design is not specifically limited, and any method achievable with existing technology can be used. For electric coffee machines, the main body also includes a control circuit board 250, a power unit (battery and / or power port), and a button module (power on / off or function settings). Combined with the aforementioned heating device 261, water tank 260, water pipe 500, and water pump 230, automatic water supply for coffee extraction and brewing can be achieved. For semi-automatic or manual coffee machines, modules or components requiring power supply may be omitted, and water supply to the extraction head 300 can be achieved using existing technologies.
[0037] Referring to Figures 3-6, the extraction head 300 of this application has an extraction chamber 332 for holding a coffee capsule 600 and extracting coffee. The extraction head 300 also has a water inlet 331 and a liquid outlet 321 communicating with the liquid passage of the extraction chamber 332. A hollow needle 310 and a filter assembly 325 are disposed within the extraction chamber 332 of the extraction head 300. The water inlet 331 is located at the top of the extraction head 300 (preferably at the top center), and the liquid outlet 321 is located at the bottom of the extraction head 300 (preferably at the bottom center). The hollow needle 310 forms a hollow channel inside and has several water injection holes 311 on its side, which are installed in the water inlet 331. The hollow needle 310 is used to pierce the top wall of the coffee capsule and penetrate into the capsule, so that the water injection holes 311 are located inside the top of the capsule. Water from the main body of the coffee machine is input into the extraction chamber 332 through a hollow needle 310 installed in the water inlet 331. After extraction, the coffee liquid is filtered by the filter assembly 325 and flows out through the outlet 321. The filter assembly 325 is located at the outlet 321 and can be positioned above the outlet 321. In a preferred embodiment, a pointed needle 324 is located at the center of the bottom of the extraction chamber 332. The pointed needle 324 has a pointed conical head for piercing the bottom wall of the coffee capsule to form an outlet hole. The pointed needle 324 is located above the outlet 321.
[0038] In some embodiments, the hollow needle 310 can be an extraction head mounting part installed on the coffee machine body. After the extraction head 300 is installed on the main body, the hollow needle 310 passes through the water inlet hole 331 at the top of the extraction head and pierces the coffee capsule. Alternatively, the hollow needle 310 is installed on the extraction head 300, inserted into the water inlet hole 331, and fixedly installed. One end of the hollow needle 310 is connected to the water outlet of the main body, for example, to a water pipe 500, which can be connected via a water pipe connector; the other end has the water inlet hole 311 on its side.
[0039] In one specific embodiment, the extraction head 300 is a rotating body, comprising a hollow needle 310, a base 320, and a coffee chamber 330. The base 320 and coffee chamber 330 are mutually compatible rotating bodies. The top of the coffee chamber 330 contains an extraction cavity 332 for holding a coffee capsule, and its bottom is connected to the base 320. A water inlet hole 331 is located at the center of the top of the coffee chamber 330, and the hollow needle 310 is inserted into the water inlet hole 331. An outlet hole 321 is located at the center of the base 320, and a pointed needle 324 and a filter assembly 325 are installed at the center of the base 320 and above the outlet hole 321. The pointed needle 324 can be a nail-like structure, including a pointed conical head for the bottom wall of the coffee capsule and a connecting rod for connecting to the outlet hole 321 (or connecting to the center of the base 320). The filter assembly 325 can be a cylindrical mesh structure, fitted over the connecting rod of the pointed needle 324 and abutting against the edge of the outlet hole 321. A gap exists between the filter assembly 325 and the needle 324, forming a liquid outlet channel 326, which communicates with the liquid outlet hole 321. A gap also exists between the connecting rod at the bottom of the needle 324 and the inner wall of the liquid outlet hole 321 to allow coffee liquid to flow out. After extraction, the coffee liquid is filtered by the filter assembly 325 and flows into the liquid outlet channel 326, then into the liquid outlet hole 321, and finally out for the user to use. After the base 320 is assembled into the coffee chamber 330, it presses the coffee capsule 600 inside the extraction chamber 332. The needle 324 at the center of the base 320 pierces the bottom wall of the capsule and penetrates into the capsule. After the extraction head 300 is installed in the main body of the coffee machine, a hollow needle 310 pierces the top wall of the coffee capsule and penetrates into the center of the top of the capsule. The hollow needle 310 is connected to the water pipe 500 of the main body.
[0040] The base 320 and coffee compartment 330 can be connected by threads or other snap-fit methods. For example, the outer rotating wall of the base 320 has external threads, and the inner rotating wall of the bottom of the coffee compartment 330 has internal threads. The base 320 and coffee compartment 330 are assembled by a press-and-screw method; that is, after alignment, the base 320 and coffee compartment 330 are rotated relative to each other until they are in place. The coffee capsule 600 is then pressed into the extraction head 330 and can be installed in the main body of the coffee machine for coffee brewing. After coffee brewing, the extraction head is removed from the main body. The base 320 and coffee compartment 330 are separated by rotating in opposite directions, allowing the coffee capsule to be removed. In this embodiment, after the extraction head 300 is assembled, the needle 324 at the center of the base 320 only pierces the center of the capsule's bottom wall. The needle 324 can rotate in both directions relative to the perforation at the center of the capsule's bottom wall without damaging the coffee capsule or causing coffee powder to scatter. Reversing the rotation of the base 320 or coffee compartment 330 will not break the coffee capsule, making it very convenient to insert and remove the coffee capsule.
[0041] The following are exemplary embodiments provided to facilitate implementation of this application by those skilled in the art.
[0042] Please refer to Figures 1 to 10. The coffee machine provided in this application embodiment has a main body including an upper shell 100 and a lower shell 200. The extraction head 300 is detachably mounted on the upper housing 100, which is rotatably mounted on the top of the lower housing 200. The bottom end of the upper housing 100 has a mounting cavity 110 for assembling the extraction head 300. The extraction head 300 is connected by a thread or by other snap-fit methods to the mounting cavity 110 for brewing coffee. The extraction head 300 includes a hollow needle 310, a base 320, and a coffee chamber 330. The base 320 and the coffee chamber 330 are connected by a thread or by other snap-fit methods. The mounting cavity 110 has a water outlet connector 111, one end of which is connected to the connecting end of the hollow needle 310. Water injection holes 311 are provided on both sides of the pointed end of the hollow needle 310 to increase the pressure and impact of the hot water flow, thereby ensuring full contact between the hot water and the coffee powder inside the coffee capsule, resulting in higher coffee extraction efficiency. The coffee chamber 330 is provided with an extraction cavity 332 with a through hole 331. The pointed end of the hollow needle 310 passes through the through hole 331 and is located in the extraction cavity 332. The base 320 is provided with a liquid outlet through hole 321 and a liquid outlet connecting seat 323 communicating with the liquid outlet through hole 321. The liquid outlet connecting seat 323 is provided with a pointed needle 324 and a filter assembly 325. The filter assembly 325 is sleeved on the connecting end of the pointed needle 324. A gap is provided between the filter assembly 325 and the connecting end of the pointed needle 324 to form a liquid outlet channel 326. When making coffee, the coffee capsule can be a large coffee capsule with a single capacity of generally between 10-15 grams, which can extract 150-500 ml of coffee liquid, or a small coffee capsule with a single capacity of mostly 5-8 grams, with an extraction volume concentrated in 25-50 ml. After placing the coffee capsule 600 into the extraction cavity 332 of the coffee chamber 330 of the extraction head, the base 320 and the coffee chamber... 330 is connected by threads, and the pointed end of the needle 324 of the base 320 pierces into the coffee capsule from the center of the bottom, so that the pointed end of the needle 324 and the filter assembly 325 are located inside the coffee capsule. The pointed end of the hollow needle 310 pierces into the center of the top of the coffee capsule placed in the extraction chamber 332 of the extraction head, and is located inside the coffee capsule. When the brewing process is started, hot water is pumped from the water tank 260 into the hollow needle by the water pump 230. High-pressure water is then sprayed laterally from the water inlet holes on both sides of the hollow needle to the inner ring wall of the coffee capsule, forming a circulation. The water flows along the inner ring wall of the coffee capsule to the filter assembly at the bottom center. The filtered coffee liquid flows out through the outlet channel, achieving high-pressure extraction. The water flow path length during the circulation extraction process is approximately twice the length of a normal direct current path, thus fully saturating and extracting the coffee powder inside the coffee capsule, greatly improving the extraction efficiency and effect. The inner ring wall of the coffee capsule typically includes interconnected arc-shaped inner sidewalls and a circular bottom wall.
[0043] In the embodiments of this application, the water flow path for hot water extraction of coffee is as follows: the water jet from the injection hole is sprayed laterally from the top of the coffee capsule to the inner wall of the coffee capsule, flows downward along the inner wall surface to the bottom wall of the coffee capsule, and flows from the edge of the bottom wall to the central through hole, thus forming a circulation path, maximizing the hot water flow path to fully wet and dissolve the coffee powder and obtain a higher extraction rate. In a specific example, the circulation path for extracting coffee includes a path from the top of the capsule along its arc-shaped inner sidewall from top to bottom to the edge of the circular bottom wall to the central through hole of the circular bottom wall. Multiple injection holes are provided on the side of the hollow needle, spraying water laterally in multiple directions. The water flows from the entire arc-shaped inner sidewall to the bottom wall, and from the circumference of the bottom wall along the wall surface to the central through hole; correspondingly, the water flow path includes a quarter arc surface (or possibly a half arc surface or other proportions of arc surface or curved surface) from the top of the capsule along the arc-shaped inner sidewall from top to bottom, with the radius being the distance from the edge of the circular bottom wall to the central through hole of the circular bottom wall. In existing coffee machines, the water flow path for extracting coffee is typically the vertical distance from the top of the coffee capsule to the bottom wall, with a maximum height approximately equal to the radius. Therefore, the coffee machine of this application features a longer (twice as long or more) hot water circulation path during extraction compared to existing machines, and the hot water surrounds the coffee grounds from the outside in, significantly improving extraction efficiency.
[0044] In the embodiments of this application, the center of the liquid outlet connector 323 is provided with a groove 327. Water flows along the inner ring wall of the coffee capsule to the groove 327 at the bottom center, effectively preventing water from overflowing the liquid outlet connector 323. The groove 327 is provided with a liquid outlet hole 322 communicating with the liquid outlet through hole 321. A connector 340 is provided in the liquid outlet hole 322. The connector 340 has an internal thread hole. The connecting end of the needle 324 is provided with an external thread that matches the internal thread hole. At least one flat surface 3241 is laterally opened on the periphery of the connecting end of the needle 324. The connector 340 and the connecting end of the needle 324 are connected to each other so that a gap 328 is formed between the flat surface 3241 and the internal thread hole. The coffee liquid flows along the gap 328 to the liquid outlet through hole 321 to complete the coffee making.
[0045] In the embodiments of this application, the lower housing 200 is provided with a mounting bracket 210, a heat dissipation device 220, a water pump 230, a rechargeable battery 240, and a first control circuit board 250. One top end of the lower housing 200 is provided with a water tank 260 for placing the extraction head 300. The water tank 260 is used to inject water and is connected to the inlet end of the water pump 230 via a water pipe 500. The outlet end of the water pump 230 is connected to one end of the outlet connector 111 via a water pipe 500. The rechargeable battery 240 can have a capacity of 20000mAh or higher, which is 2.5 to 3 times the capacity of existing coffee machines on the market, and can be used to charge mobile phones and other small devices. The heat dissipation device 220 effectively solves the problem of excessively high internal temperature of the lower housing 200 caused by the heating of the high-power heating plate 261. It dissipates heat during operation, preventing the use of the product from being affected by excessively high internal temperature, and greatly improving the heat dissipation effect inside the product. For example, the heat dissipation device 220 is a fan. The mounting bracket 210 is provided with a first placement slot 211, a second placement slot 212 and a third placement slot 213. The water tank 260 is fixed to the first placement slot 211 by fasteners. The water pump 230 is fixed to the second placement slot 212 located below the water tank 260 by fasteners. The first control circuit board 250 is disposed in the third placement slot 213. The heat dissipation device 220, the water pump 230 and the rechargeable battery 240 are respectively connected to the first control circuit board 250. A second control circuit board 120 is disposed inside the upper housing 100. The first control circuit board 250 is connected to the second control circuit board 120.
[0046] In the embodiments of this application, the top of the lower housing 200 is provided with a water tank mounting groove 270 and a rotating groove 280. The water tank mounting groove 270 is connected to the mounting bracket 210 by fasteners. A limiting mounting seat 290 is provided inside the lower housing 200 below the rotating groove 280. The water tank body 260 is installed in the water tank mounting groove 270. The other end of the bottom of the upper housing 100 is provided with a hollow connecting portion 130. A limiting groove 13 is provided inside the hollow connecting portion 130. 1. The limiting groove 131 is provided with a limiting baffle 132. The hollow connecting part 130 extends into the rotating groove 280 and the limiting mounting seat 290 is locked to the limiting baffle 132 by fasteners, so that the upper housing 100 can be rotated horizontally relative to the lower housing 200 to adjust the angle. The extraction head 300 is installed in the mounting cavity 110. When not in use, the extraction head 300 is removed and placed in the water tank 260, and the upper housing 100 is rotated horizontally back to the initial position.
[0047] In the embodiments of this application, the surface of the rotating groove 280 is provided with a plurality of equidistant annular hemispherical cavities 281 and bosses 282, and the surface of the bosses 282 is provided with semi-circular cavities 283; the bottom of the upper housing 100 near the hollow connecting part 130 is provided with a semi-annular groove 133, and one end of the semi-annular groove 133 is provided with a raised hemisphere 134 that mates with the hemispherical cavity 133. The raised hemisphere 134 is adapted to any one of the hemispherical cavities 133. When the upper housing 100 is rotated, the raised hemisphere 134 moves from one hemispherical cavity 133 to the next hemispherical cavity 133 to effectively prevent misalignment.
[0048] In the embodiments of this application, the bottom of the water tank 260 is provided with a heating plate 261. The heating plate 261 can heat 60 ml of room temperature water to 92 degrees Celsius in about 1 minute. 92 degrees Celsius is a suitable temperature for most coffee extractions, achieving rapid heating of cold water, increasing heating power, and greatly improving the user experience. The heating plate 261 is electrically connected to the first control circuit board 250. The heating plate 261 is provided with a temperature sensor 262 for monitoring and controlling the temperature. The temperature sensor 262 is electrically connected to the heating plate 261. The top of the water tank 260 is provided with a removable cover 263. The bottom of the water tank 260 is provided with a water outlet 264 and a mounting hole 265. The water outlet 264 is connected to the water inlet of the water pump 230 through a water pipe 500. The temperature sensor 262 is located in the mounting hole 265 for monitoring and controlling the temperature of the water in the water tank.
[0049] In other embodiments of this application, the coffee compartment 330 may also be provided with a powder container for storing coffee powder, which can be used for self-filling coffee powder, allowing users to select the maximum variety of coffee types; the powder container includes a powder box and a powder cover attached to the powder box, the powder cover has an opening, the powder box has a powder cavity with an opening at the top, and the bottom surface of the powder cavity has a powder cavity opening at the center; the powder container is placed in the extraction chamber, the needle and the filter assembly pass through the powder cavity opening and are located in the powder cavity, and the pointed end of the hollow needle passes through the through hole and the opening in sequence and is located in the powder cavity.
[0050] In the embodiments of this application, the first control circuit board 250 is provided with a charging port 251, multiple output ports 252, indicator lights 253, and a switch module 254. The front of the lower housing 200 is provided with a button panel 201, which has a charging slot 202, an output slot 203, an indicator light hole 204, and a switch button 205. The charging slot 202 is connected to the charging port 251, the output slot 203 is connected to the output port 252, the indicator light hole 204 is connected to the indicator light 253, and the switch module 254 is connected to the switch button 205. An external power source can be connected through the charging port 251 to charge the rechargeable battery 240. The rechargeable battery 240 supplies power to the output ports 252 and the second control circuit board 120 through the first control circuit board 250. The output ports 252 can be used to charge external electronic devices such as mobile devices, eliminating the need to carry an additional power bank.
[0051] In this embodiment of the application, a switch guide post 140 is further provided inside the upper housing 100, and a spring 150 is sleeved on the switch guide post 140; a placement slot 160 is provided inside the upper housing 100 near the protruding hemisphere 134, and the switch guide post 140 is placed in the placement slot 160; the second control circuit board 120 is provided with a limit switch module 121, one end of the switch guide post 140 abuts against the limit switch module 121, and the other end of the switch guide post 140 is adapted to the semi-circular cavity 283. When one end of the switch guide post 140 is located in the semi-circular cavity 283 on the protrusion, the other end of the switch guide post 140 is away from the limit switch module 121; when one end of the switch guide post 140 is away from the semi-circular cavity 283, the other end of the switch guide post 140 is connected by the spring 150. When the upper housing 100 is compressed and rises to touch the limit switch module 121, and the upper housing 100 rotates horizontally 180 degrees relative to the lower housing 200, one end of the switch guide post 140 is pushed up and presses against the limit switch module 121 to switch to the coffee brewing function mode. At this time, the power bank discharge function module is disabled or restricted. When one end of the switch guide post 140 moves away from the limit switch module 121, it switches to the power bank function mode. The limit switch module of the second control circuit board 120 realizes the switching between the power bank and the coffee brewing function module, avoiding the functional impact caused by voltage instability and other factors when using two functions at the same time. For example, when using the extraction and heating of cold water function, the battery output voltage will be pulled down because a large power is required. If the power bank function is also used at this time, it will not be able to charge because the battery voltage is pulled down.
[0052] In an embodiment of this application, a sealing ring 350 may be further provided between the base 320 and the coffee capsule 330. The coffee capsule 330 has an annular groove 360 on the outer surface of the extraction chamber 332. The sealing ring 350 is placed in the annular groove 360. The sealing ring 350 is made of silicone to effectively prevent water in the coffee capsule from overflowing from the gap between the base 320 and the coffee capsule 330.
[0053] In the embodiments of this application, the filter component 325 has a porous structure 3251 or a narrow slit structure 3252, which effectively prevents the extracted coffee grounds from flowing into the liquid outlet channel 326, thereby achieving a high-pressure extraction effect.
[0054] In the embodiments of this application, the bottom of the lower housing 200 is provided with a bottom cover 400, the bottom cover 400 is provided with a plurality of air inlets 401 and a plurality of air outlets 402, the bottom cover 400 is provided with a partition 403 between the air inlets 401 and the air outlets 402, the rechargeable battery 240, the first control circuit board 250, the water pump 230 and the heating plate 261 are located above the air outlets 402, the heat dissipation device 220 is provided above the air inlets 401, so that a U-shaped air duct is formed inside to fully cover the heat dissipation area, and the bottom of the bottom cover is provided with a plurality of anti-slip pads to effectively prevent the lower housing from sliding.
[0055] The coffee machine provided in this application operates as follows: When making coffee, the upper housing is first rotated horizontally 180 degrees relative to the lower housing. The coffee capsule can have a single capsule capacity of 10-15 grams, extracting 150-500 ml of coffee liquid, or a single capsule capacity of 5-8 grams, extracting 25-50 ml of coffee liquid. After placing the coffee capsule into the extraction chamber of the extraction head, the base and coffee chamber are connected by threads. Simultaneously, the pointed end of the needle on the base pierces into the coffee capsule from the center of the bottom, positioning the pointed end of the needle and the filter assembly inside the coffee capsule. Then, the top of the coffee chamber is threaded into the mounting cavity of the upper housing, with the pointed end of the hollow needle piercing into the upper housing. The coffee capsule is positioned at the top center of the extraction chamber in the extraction head. Pressing the power button activates the heating plate inside the coffee machine, which heats the cold water in the water tank. Once the temperature sensor detects that the water in the water tank has reached the preset temperature, the water pump pressurizes the hot water in the water tank and sprays it horizontally through the water outlet of the hollow needle to the inner ring wall of the coffee capsule, forming a circulation. The hot water flows along the inner ring wall of the coffee capsule to the filter assembly in the groove at the bottom center for high-pressure coffee extraction. The extracted coffee liquid then flows out through the outlet channel, completing the coffee making process. The water flow path during the circulation extraction process is approximately twice the length of a normal direct current path, thus fully saturating and extracting the coffee grounds inside the coffee capsule. When not in use, the extraction head can be removed and placed in the water tank. The upper casing can then be rotated 180 degrees horizontally relative to the lower casing to return to its initial retracted position. Therefore, users can brew coffee simply by touching the power button on the button module. The time / temperature adjustment buttons on the upper casing can be used to set the desired flavor, making coffee brewing quick and easy. When the user's mobile device runs out of power, it can be charged by plugging a data cable into the output port on the lower casing, effectively turning the coffee machine into a power bank.
[0056] In the above embodiments, the coffee machine is designed as an elongated oval shape. Its upper casing is rotatable, separating from the lower casing to utilize external space for installing the extraction head to make coffee. This does not occupy the internal space of the lower casing, thus optimizing the internal space of the coffee machine and providing ample space for the rechargeable battery. The battery capacity can reach 20,000 mAh or higher, which is 2.5 to 3 times that of existing models on the market. Considering the potential charging needs of mobile phones and other small electronic devices during outdoor use, the coffee machine's power bank function is used to charge these devices. The coffee machine of this application is portable and addresses consumers' charging needs.
[0057] To address the issue of long heating times in existing products, the coffee machine of this application uses a high-capacity, high-rate discharge rechargeable battery, which increases the heating power of the heating plate by more than 2.5 times, shortening the cold water heating time to about two minutes and greatly improving the user experience.
[0058] To address the issue of excessively high internal temperatures caused by high-power heating, the coffee machine of this application incorporates a heat dissipation device and, through structural design, forms a U-shaped airflow channel within the internal space of the coffee machine. The heat dissipation area essentially covers the electronic components, ensuring that components such as the rechargeable battery and the first control circuit board can be effectively cooled.
[0059] The coffee machine of this application uses a limit switch module to switch between the coffee making function and the power bank discharge function. When the top shell is rotated to a predetermined position, the limit switch module is touched to switch between the power bank discharge function and the coffee making function. When switching to the coffee making function, the power bank discharge function is disabled or restricted.
[0060] This application optimizes the structure and size design of the extraction head and the water tank, placing the extraction head inside the water tank. In this retracted state, the extraction head can be placed inside, making it more convenient to use.
[0061] The preferred embodiments disclosed above are merely illustrative of this application. These preferred embodiments do not exhaustively describe all details, nor do they limit the application to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.
Claims
1. A coffee machine, comprising a main body and an extraction head, wherein the main body is provided with an extraction head mounting portion, and the extraction head is detachably mounted on the mounting portion; the main body is used to supply water to the extraction head for coffee making, the extraction head is provided with an extraction chamber for holding a coffee capsule or coffee powder container, and the extraction head is provided with a water inlet and a liquid outlet communicating with the extraction chamber, characterized in that: The extraction head includes a hollow needle with several water injection holes on its tip sidewall. A water inlet hole is located at the center of the top of the extraction chamber. The hollow needle passes through the water inlet hole, and its tip pierces the top of the coffee capsule or coffee powder container within the extraction chamber. The hollow needle can be connected to the water outlet of the main body mounting section, and water is sprayed from its injection holes from the top of the coffee capsule or coffee powder container towards the arc-shaped sidewall of the coffee capsule or coffee powder container. A pointed needle with a conical head is located at the center of the bottom wall of the extraction chamber, used to pierce the bottom wall of the coffee capsule or coffee powder container to form a central liquid outlet. During coffee extraction, the water sprayed from the injection holes of the hollow needle flows through the arc-shaped sidewall of the coffee capsule or coffee powder container, towards the edge of the bottom wall of the coffee capsule or coffee powder container, and then flows through the wall surface of the bottom wall of the coffee capsule or coffee powder container towards the central liquid outlet, forming a circulation path.
2. The coffee machine as described in claim 1, characterized in that, The hollow needle is installed in the extraction head mounting part of the main body, or fixed in the water inlet hole at the top of the extraction head.
3. The coffee machine as described in claim 1, characterized in that, The extraction head is a rotating body, including a base and a coffee chamber, which are mutually compatible rotating bodies. The top of the coffee chamber contains an extraction cavity for placing coffee capsules or coffee powder, and the bottom is connected to the base. The water inlet is located at the center of the top of the coffee chamber, and the liquid outlet is located at the center of the base. The needle and a filter assembly are installed at the center of the base and above the liquid outlet.
4. The coffee machine as described in claim 3, characterized in that, The needle includes a pointed cone head for piercing the bottom wall of a coffee capsule or coffee powder container and a connecting rod for connecting to the liquid outlet hole; The filter assembly has a cylindrical mesh structure, which is sleeved outside the connecting rod of the needle and abuts against the edge of the liquid outlet hole; there is a gap between the filter assembly and the needle to form a liquid outlet channel; the liquid outlet channel is connected to the liquid outlet hole. There is a gap between the connecting rod at the bottom of the needle and the inner wall of the liquid outlet hole to allow coffee liquid to flow out; after extraction, the coffee liquid is filtered by the filter assembly and flows into the liquid outlet channel, then into the liquid outlet hole, and finally flows out for the user to take.
5. The coffee machine as described in claim 3, characterized in that, The base and the coffee compartment can be connected by threads, with the outer rotating wall of the base having external threads and the inner rotating wall at the bottom of the coffee compartment having internal threads. The base and the coffee chamber are assembled or separated by a pressing and rotating method: after alignment, the base and the coffee chamber are rotated relative to each other, and after rotation into place, assembly is achieved. The coffee capsule is pressed tightly inside the extraction head, and the needle in the center of the base only pierces the center of the bottom wall of the capsule or coffee powder container. The needle can rotate in both directions relative to the perforation in the center of the bottom wall without damaging the coffee capsule or causing coffee powder to scatter. The base or coffee chamber is separated by rotating in the opposite direction.
6. The coffee machine as described in claim 1, characterized in that, The main body includes an upper shell, a lower shell, and an extraction head detachably mounted on the upper shell. The upper shell is rotatably mounted on top of the lower shell, and the bottom of the upper shell has a mounting cavity. The extraction head is detachably connected to the mounting cavity. The extraction head includes a hollow needle, a base detachably connected to each other, and a coffee chamber. The coffee chamber has an extraction cavity with a water inlet hole. The pointed end of the hollow needle passes through the water inlet hole and is located in the extraction cavity. The connecting end of the hollow needle is connected to the mounting cavity. The base has a liquid outlet hole and a liquid outlet connection seat communicating with the liquid outlet hole. The liquid outlet connection seat has a needle and a filter assembly. The filter assembly is sleeved on the connecting end of the needle. A gap is provided between the filter assembly and the connecting end of the needle to form a liquid outlet channel.
7. The coffee machine as described in claim 6, characterized in that, The center of the liquid outlet connector is provided with a groove, the groove is provided with a liquid outlet hole communicating with the liquid outlet through hole, the liquid outlet hole is provided with a connector, the connector is provided with an internal thread hole; the connecting end of the needle is provided with an external thread matching the internal thread hole, and the periphery of the connecting end of the needle is provided with at least one flat surface laterally, the connector and the connecting end of the needle are connected to each other so that a gap is formed between the flat surface and the internal thread hole.
8. The coffee machine as described in claim 6, characterized in that, The lower housing is provided with a mounting bracket, a heat dissipation device, a water pump, a rechargeable battery, and a first control circuit board. The water pump and the rechargeable battery are respectively connected to the first control circuit board. The mounting cavity is also provided with a water outlet connector. The water outlet end of the water pump is connected to one end of the water outlet connector through a water pipe. The other end of the water outlet connector is connected to the connecting end of the hollow needle. Water injection holes are provided on both sides of the pointed end of the hollow needle.
9. The coffee machine as described in claim 8, characterized in that, The lower housing has a water tank at one top end for housing the extraction head, which is connected to the water pump via a water pipe. The top of the lower housing has a water tank mounting groove and a rotating groove. A limiting mounting seat is located below the rotating groove inside the lower housing. The water tank is positioned within the water tank mounting groove. A hollow connecting portion extends from the bottom of the upper housing. A limiting groove is located within the hollow connecting portion, and a limiting baffle is provided in the limiting groove. The hollow connecting portion extends into the rotating groove, and fasteners lock the limiting mounting seat and the limiting baffle together, allowing the upper housing to rotate horizontally relative to the lower housing to adjust its angle. The extraction head is installed in the mounting cavity. When not in use, the extraction head is removed and placed inside the water tank, and the upper housing is rotated horizontally back to its initial position.
10. The coffee machine as described in claim 9, characterized in that, The bottom of the water tank is provided with a heating plate, which is electrically connected to the first control circuit board. The heating plate is provided with a temperature sensor, which is electrically connected to the heating plate. The top of the water tank is provided with a removable cover. The bottom of the water tank is provided with a water outlet and a mounting hole. The water outlet is connected to the water inlet of the water pump through a water pipe. The temperature sensor is located in the mounting hole.
11. The coffee machine as claimed in claim 1, characterized in that, The coffee compartment is also provided with a powder container for holding coffee powder. The powder container includes a powder box and a powder cover that is fastened to the powder box. The powder cover has an opening. The powder box has a powder cavity with an opening at the top. The powder cavity has a powder cavity opening at the center of its bottom surface. The powder container is placed in the extraction chamber. The needle and the filter assembly pass through the powder cavity opening and are located in the powder cavity. The pointed end of the hollow needle passes through the through hole and the opening in sequence and is located in the powder cavity.
12. The coffee machine as described in claim 6, characterized in that, A sealing ring is provided between the base and the coffee compartment; the filter assembly has a porous structure or a narrow slit structure.