coffee machine

Abstract

Coffee machine, comprehensive: a main body, comprising: a water container for holding water; a first control board; a battery; an electric heating module for heating water in the water tank; and a water pump that is in fluid connection with the water reservoir; a rotatable part that serves as the upper shell of the main body and is rotatable relative to the main body between a stowing position and an operating position; wherein a hollow shaft is provided on a first side of the rotatable part, rotatably connected to the main body, and a circular receptacle is provided on a second side of the rotatable part, arranged next to the hollow shaft; and an extraction head which is located in the water reservoir when the coffee machine is in a stowed state according to the stowing position, and which is detachably connected to the circular receptacle of the rotating part when the coffee machine is in an operating state for preparing coffee according to the operating position of the rotating part; wherein the first control board is electrically connected to the battery, the electric heating module and the water pump, all of which are arranged within a housing of the main body; wherein, in the stowed state of the coffee machine, the rotatable part rests on an upper wall of the main body, with the circular receptacle located above the water reservoir; wherein, in the operating state, the second side of the rotatable part rotates away from the main body, the circular receptacle moves away from the main body and exposes the water reservoir; and the water pump is in fluid communication with the water reservoir and the extraction head connected to the circular receptacle and pumps water from the water reservoir to the extraction head for the preparation of coffee.

Description

REFERENCE TO RELATED REGISTRATIONS

[0001] The present invention benefits from prior filing dates; priority rights of Chinese application no. 202520038697.5, filed on 7 January 2025, and Chinese application no. 202521269540.X, filed on 19 June 2025, the disclosures of which are incorporated herein by reference. BACKGROUND OF THE INVENTION Area of ​​the invention

[0002] The present invention relates to the field of household appliances, in particular a coffee machine. Description of the state of the art

[0003] With rising living standards, coffee drinks made from roasted and ground coffee beans have become a symbol of the modern lifestyle. People typically drink a cup of coffee in the morning or during their leisure time. Enjoying a rich and fragrant cup of coffee in their free time not only refreshes them but also allows them to fully experience the relaxation and enjoyment of their leisure time. Existing coffee machines usually dispense the coffee from the bottom of a water reservoir installed in the main body. This design requires space to accommodate the coffee, which reduces the interior space of the main body, allowing for a smaller capacity water heater that can heat less water.Especially when hot water is unavailable outdoors and multiple espresso servings need to be prepared, such a design may not be suitable. Alternatively, using a larger-capacity battery would increase the size of the coffee maker, making it unwieldy to transport. On the other hand, with this type of coffee maker, the user often has to hold the machine, its stand, or the coffee cup while preparing coffee, making it inconvenient to use. SUMMARY OF THE INVENTION

[0004] The aim of the present invention is to provide a coffee machine that solves the problems of inconvenient operation and inefficient use of space of existing coffee machines.

[0005] A coffee machine comprises a main body, a rotating part, and an extraction head. A water reservoir, a primary control board, a battery, an electric heating element for heating the water in the reservoir, and a water pump connected to the reservoir are all installed within the main body. The rotating part serves as the upper shell of the main body and can be rotated between a storage position and an operating position relative to the main body. A hollow shaft is provided on one side of the rotating part and is rotatably connected to the main body. A circular receptacle is provided on the other side of the rotating part and is positioned next to the hollow shaft.The extraction head is located in the water reservoir when the coffee maker is in its stored position, and is detachably connected to the circular receptacle of the rotating part when the coffee maker is in its operating position for brewing coffee. The first control board is electrically connected to the battery, the electric heating element, and the water pump. When the coffee maker is stored, the rotating part rests on an upper wall of the main body, with the circular receptacle positioned above the water reservoir.In the operating state, the second side of the rotating part turns away from the main body, the circular receptacle moves away from the main body and exposes the water reservoir; and the water pump is in fluid communication with the water reservoir and the extraction head connected to the circular receptacle and pumps water from the water reservoir to the extraction head for preparing coffee.

[0006] In one embodiment, the first control board has a power bank discharge function module for charging an electronic device, making the coffee machine switchable between a coffee preparation function and a power bank discharge function for supplying power to the electronic device.

[0007] In one embodiment, the coffee machine according to claim 2, the battery capacity is greater than 20000 mAh.

[0008] In one embodiment, the first control board is provided with a plurality of electrical interfaces, a plurality of indicator lights, and a keypad module. The indicator lights are used to display a battery level or the time remaining during a coffee brewing process. The electrical interfaces include a charging interface and a discharging interface, and the first control board controls the battery to charge the electronic device via the discharging interface, thereby realizing the coffee machine's power bank discharge function. The housing of the main body defines an opening. The first control board is located behind the opening, and the plurality of electrical interfaces, the plurality of indicator lights, and the keypad module extend from the first control board toward the opening and are exposed on the main body for easy operation or display.

[0009] In one embodiment, a second control board is provided inside the rotatable part and connected to the first control board to implement the coffee brewing function of the coffee machine; the second control board is equipped with a position switch to trigger the coffee brewing function and / or the power bank discharge function.

[0010] In one embodiment, the second control board is provided with a temperature control function module and / or a time control function module; setting buttons are arranged on a housing of the rotatable part, are electrically connected to the second control board and are used to set the temperature and / or time during a coffee preparation process.

[0011] In one embodiment, a guide rod is provided below the position switch, which is connected to a compressible spring; the guide rod is movable up and down to press or release the position switch.

[0012] In one embodiment, the upper wall of the main body defines a shaft opening and a water tank mounting opening side by side; the hollow shaft extends rotatably within the housing of the main body through the shaft opening; the water tank is installed within the housing of the main body, with the open top of the water tank being received in the water tank mounting opening.

[0013] In one embodiment, the guide rod is installed in the rotating part and rotates together with the rotating part; a projection is provided on the upper wall of the main body; in the operating state, the guide rod rotates onto the projection, the projection pushes the guide rod upwards to press the position switch, thereby triggering the coffee brewing function and / or the power bank discharge function; and in the stowed state, the guide rod rotates away from the projection, and the spring drives the guide rod downwards to release the position switch.

[0014] In one embodiment, a hollow column is arranged through a lower wall of the rotatable part; the guide rod and the spring pushed onto the guide rod are inserted into the hollow column and are movable up and down along the hollow column; and the position switch is arranged on a base surface of the second control board opposite the hollow column.

[0015] In one embodiment, an annular groove is formed around the hollow shaft on a lower wall of the rotatable part, wherein an annular flange around the shaft opening on the upper wall of the main body is displaceable along the annular groove when the rotatable part rotates. An arcuate groove on the outer circumference of the hollow shaft is formed on the lower wall of the rotatable part; the projection engages displaceably in the arcuate groove when the rotatable part rotates. Ball bearings are provided on an outer circumference of the hollow shaft, forming a rolling fit between the lower wall of the rotatable part and the upper wall of the main body; several bearing recesses are formed on the upper wall of the main body, distributed around the circumference of the shaft opening; the ball bearings are in a rolling fit with the bearing recesses when the rotatable part rotates.The projection is an arc that corresponds to the outer circumference of the shaft opening and is located between the annular flange and a circle formed by the bearing recesses.

[0016] In one embodiment, a lower end of the hollow shaft is connected to an end cap to limit axial movement of the hollow shaft, allowing the hollow shaft to rotatably fit into the shaft opening without falling out.

[0017] In one embodiment, the end cap comprises a circular upper plate and a circular lower plate that are rigidly connected to each other; the circular upper plate is inserted into the hollow shaft and is held firmly in place; the circular lower plate comprises an annular side wall to form an annular groove between the circular lower plate and the circular upper plate; the lower end of the hollow shaft fits into the annular groove; the circular lower plate is clamped outside the shaft opening to confine the shaft. The shaft opening extends downward to form an annular sleeve within the main body; the hollow shaft is inserted into the annular sleeve, and the circular lower plate is clamped outside an open lower end of the annular sleeve.An annular wall extends from the mounting opening for the water tank into the housing of the main body and is designed to receive the water tank. A through-opening is formed in the end cap, the circular receptacle defining a through-opening that is in fluid communication with the extraction head connected to the circular receptacle. A water line connects the water pump and the circular receptacle through the through-opening in the end cap and the hollow shaft. One end of the water line is connected to a water outlet pipe of the water pump via a pipe coupling, and the other end of the water line is connected to the circular receptacle via another pipe coupling installed in the through-opening in the circular receptacle. The pipe couplings are rotatable through 360 degrees.

[0018] In one embodiment, the pipe coupling installed in the through-opening in the circular receptacle is connected to a hollow needle, the hollow needle being used to inject water into the extraction head and to pierce a coffee capsule placed in the extraction head.

[0019] In one embodiment, the electric heating module comprises an electric heating plate that serves as the lower wall of the water tank. A temperature sensor is provided to detect the water temperature in the water tank and is connected to the first control board to control the heating power supplied to the electric heating module. The heating power of the electric heating module, as well as the capacity and discharge rate of the battery, are configured such that the electric heating module is able to heat the water in the water tank to 86 to 95 °C within a few minutes.

[0020] In one embodiment, a fan is installed in the main body, the housing of which defines air inlets and air outlets. A partition plate is provided between the air inlets and the air outlets, dividing a space within the housing into an air inlet side and an air outlet side, and forming a U-shaped airflow path within the housing that extends from the air inlets on the air inlet side to the air outlets on the air outlet side. The fan is located behind the air inlets. The battery and the first control board are both located within a heat dissipation area of ​​the U-shaped airflow path. When the fan is activated, ambient air is drawn from the air inlets into the main body, flows along the U-shaped airflow path for heat exchange, and is then expelled from the main body through the air outlets.

[0021] In one embodiment, a bracket is provided inside the housing of the main body; the battery, the water pump, the first control board and the water tank are installed via the bracket inside the main body; the bracket includes a cover plate; on the cover plate, an annular mounting receptacle is provided which is adapted to the water tank, the lower wall of the water tank is mounted in the annular mounting receptacle, and the water pump is located below the water tank.

[0022] In one embodiment, the lower wall of the water tank defines a through-hole for connecting a water inlet pipe of the water pump; the lower wall of the water tank defines another through-hole for installing a temperature sensor to detect the water temperature in the water tank.

[0023] In one embodiment, the air inlets and air outlets are defined in a lower wall of the main body, the partition plate is attached to the lower wall of the main body and extends upwards, and the first control board is supported on a top surface of the partition plate.

[0024] The advantages of the present invention are: The coffee machine of the present application is designed with a rotatable part that can be stored in or unscrewed from the main body, and the structure and size of the extraction head and the water reservoir are optimized. In its stowed state, the extraction head can be housed in the water reservoir; during operation, the rotatable part is unscrewed from the main body and protrudes outwards, and the extraction head, removed from the water reservoir, is attached to the coffee machine and protrudes outwards, thus optimizing space utilization and making the overall machine smaller. The design of the rotatable part allows a coffee cup to be placed directly on a table during coffee preparation, making the machine more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figures 1-2 are exploded views of a coffee machine in a stowed state according to an embodiment of the present application; Fig. Figure 3 is a perspective view of the coffee machine in a stowed state according to the embodiment of the present application; Fig. Figure 4 is a perspective view of a rotatable part of the coffee machine according to the embodiment of the present application; Fig. Figure 5 is a perspective view of the coffee machine, wherein a rotatable part of it rotates away from the main body according to the embodiment of the present application; Fig. Figure 6 is a perspective view of the coffee machine in an operating state according to the embodiment of the present application; Fig. Figure 7 is an exploded view of the coffee machine in operating condition according to the embodiment of the present application; Fig. 8 is a left view of the coffee machine in operating condition according to the embodiment of the present application; Fig. Figure 9 is a sectional view along line IX-IX in Fig. 8; Fig. Figures 10-11 are exploded views of the coffee machine in operating condition according to the embodiment of the present application; Fig. 12 is a bottom view of the coffee machine in operating condition according to the embodiment of the present application; Fig. 13 is a sectional view along line XIII-XIII in Fig. 12; and Fig. 14 is a sectional view along line XIV-XIV in Fig. 12. DETAILED DESCRIPTION OF THE INVENTION

[0025] Certain exemplary embodiments are described below to provide a general understanding of the principles of structure, function, manufacture, and use of the devices and methods disclosed herein. One or more examples of these embodiments are illustrated in the accompanying drawings. Those skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments. The features illustrated or described in connection with an exemplary embodiment can be combined with the features of other embodiments. Such modifications and variations are to be included within the scope of the present invention.

[0026] Certain terms are used in the following description for simplicity only and are not restrictive. The words "a," "an," and "one," as used in the claims and in the relevant parts of the description, are defined to include one or more of the elements mentioned, unless expressly stated otherwise. This terminology includes the words expressly mentioned above, derivatives thereof, and words of similar meaning. The phrase "at least one," followed by a list of two or more elements, such as "A, B, or C," means each individual element of A, B, or C, as well as any combination thereof. It should be noted that some illustrations are shown partially transparent for the purposes of explanation, illustration, and demonstration and are not intended to imply that an element would be transparent in its final manufactured form.

[0027] Although the terms "first," "second," etc., may be used here to describe different elements, components, areas, layers, and / or sections, these elements, components, areas, layers, and / or sections are not to be understood as being restricted by these terms. These terms are used only to distinguish one element, component, area, layer, or section from another. Terms such as "first," "second," and other numerical terms used here do not imply any order or sequence unless clearly evident from the context.

[0028] It is further understood that, for the sake of clarity and conciseness, spatial terms such as "vertical," "horizontal," "above," "below," "inner," "outer," "inside," "outside," "lower," "below," "on," "top," "bottom," "front," "back," "left," "right," etc., may be used in relation to the drawings. However, the device is used in many orientations and positions, and these terms are not to be understood as restrictive and / or absolute. For example, if the device is inverted in the illustrations, elements described as "below" other elements or features would then be oriented "above" those other elements or features. Thus, the example term "below" can encompass both above and below orientations. The device may also be oriented differently (rotated 90 degrees or in other orientations), and the orientation should be interpreted accordingly.

[0029] With reference to the Fig. In reference 1-14, the present application relates to a coffee machine comprising a rotatable part 200, a main body 100, and an extraction head 300. The rotatable part 200 is rotatably connected to the main body 100 and can be rotated upwards or into the interior of the main body for storage, or rotated away from the main body 100 to project outwards and accommodate the extraction head 300 for preparing coffee.

[0030] In the specific embodiments described below, the rotatable part 200 is an upper shell of the coffee maker. This rotatable design optimizes the space inside the main body 100 of the coffee maker, allowing more room for the battery. The battery capacity can be 20,000 mAh or more, which is 2.5 to 3 times that of existing coffee makers on the market. If the battery capacity is large enough, it can be used to charge mobile phones and other electronic devices. The coffee maker of the present application integrates a power bank discharge function into the control board. The coffee maker of the present application is a portable coffee maker with a power bank discharge function that meets the user's charging needs.The coffee machine of the present application uses a high-capacity, high-discharge-rate power battery, which improves the heating power by about 2.5 times and reduces the water heating time to about two minutes, significantly improving the user experience.

[0031] A first side 201 of the rotatable part 200 is rotatably connected to a first side of the top of the main body. The rotatable part 200 can be rotated to cover the top of the main body (see Fig. 3) so that the coffee machine is in a stowed state or in a stowed position. In this position, the extraction head 300 can be inserted into the water reservoir inside the main body, and the rotating part 200 adapts to the shape of the main body 100. For example, the rotating part 200 and the main body 100 are connected vertically and horizontally to form a cylinder with a uniform appearance. The rotating part 200 can be rotated until a second side 202 of it exits the top of the main body 100 and extends outwards. Referring to the Fig. 5-14 the second side 202 of the rotating part is rotated to extend outwards from the main body 100 to provide sufficient space for the installation of the extraction head 300 for brewing coffee. Fig. Figure 5 shows the process in which the rotating part turns outwards from the stowed position, and Fig. Figure 6 shows the rotatable part rotating 180 degrees into its operating position (in the operating state). As an example, the spatial direction is taken in which the coffee machine is positioned vertically (in the direction of gravity) relative to the floor; that is, the central axis of the coffee machine is vertical (in the direction of gravity), and the rotatable part 200 rotates horizontally relative to the upper wall 111 of the main body 100. It is understood that the vertical or horizontal spatial directions and the spatial orientations of the components described below are relative and not absolute spatial orientations. It is understood that in other embodiments, the front sides of the rotatable part and the main body may be in a central position or an off-center position.

[0032] The main body 100 comprises a housing 110 and a water pump 130, a battery 140, a first control board 150, an electric heating module 160, and a water reservoir 170, all arranged within the housing 110. The water reservoir 170 serves to store water for the extraction head 300. The water pump 130 is in fluid communication with the water reservoir 170 and the extraction head 300, which is mounted on the bottom of the rotatable part, thereby pumping water from the water reservoir 170 to the extraction head 300 to dissolve and extract the coffee powder located in the extraction head 300. The electric heating module 160 serves to heat the water in the water reservoir 170. In the following embodiments, the electric heating module 160 comprises an electric heating plate 161 and is located at the bottom of the water reservoir 170.In other embodiments, the electric heating module 160 can also be an electric heating wire or other electric heating structure arranged at a suitable location, such as on the bottom, sides, or inside the water tank 170, or installed at any suitable location inside or outside a water supply line between the water tank 170 and the extraction head 300, or arranged in the extraction head 300. The water pump 130, the battery 140, and the electric heating module 160 are electrically connected to and controlled by the first control board 150. The first control board 150 can also be arranged inside the rotatable part 200, or a second control board 220 can be provided inside the rotatable part 200, which is connected to the first control board 150.

[0033] The housing 110 is cylindrical (not limited to cylindrical) and comprises an upper wall 111, a cylindrical side wall 114, and a lower wall 116. The interior of the housing 110 is hollow. The upper wall 111 is flat and defines openings such as a shaft opening 112 and a water tank mounting opening 117, which are arranged side by side. As a non-limiting example, an annular wall 1170 extends from the water tank mounting opening 117 into the housing 110 and is designed to accommodate the water tank 170. An annular sleeve 1120 extends from the shaft opening 112 into the housing 110, and the shaft opening 112 and the annular sleeve 1120 serve to install a shaft 211 of the rotatable part 200.The space inside the housing 110 below the annular wall 1170 and the annular sleeve 1120 is used for installing the water pump 130, the battery 140, the electric heating module 160 and the first control board 150.

[0034] The water reservoir 170 and the shaft opening 112 are arranged side by side on the top of the main body 100. The top of the water reservoir 170 is open for filling with water, and the water reservoir 170 is designed to accommodate the extraction head 300. The extraction head 300 can be inserted into the water reservoir 170 after being removed from the rotating part 200, and a cover 301 can also be provided to cover the open top of the water reservoir 170. The rotating part 200 rotates back to the top of the main body 100 above the top of the water reservoir 170; as it rotates out of the main body, it leaves the top of the water reservoir 170, thus exposing the water reservoir 170, and the extraction head 300 can be removed from the water reservoir after removing the cover 301.The coffee machine of the present application optimizes the structure and size of the extraction head 300 and the water reservoir 170 and places the extraction head 300 inside the water reservoir 170. In this way, the extraction head 300 can also be stored inside the machine, which facilitates storage and transport of the coffee machine. During operation, the extraction head 300 is removed from the water reservoir 170, ground coffee or a coffee capsule is placed into the extraction head 300, and the extraction head 300 is connected to the rotating part for coffee extraction.

[0035] A plurality of circularly arranged bearing recesses 113 are arranged around the shaft opening 112 on the upper wall 111 of the main body (the housing 110). The bearing recesses 113 are preferably hemispherical, evenly distributed on the same circle, and are located on the outer circumference of the shaft opening 112. An annular flange 1121, formed on the upper wall 111 of the housing 110 and surrounding the shaft opening 112, extends upwards, and the annular flange 1121 is slidably engaged with an annular groove 217 (shown in Fig. 4), which surrounds the shaft 211 on the lower wall 21 of the rotatable part 200. The rotatable part 200 is provided with the shaft 211 on its underside. The rotatable part 200 is connected to the main body 100, with the shaft 211 rotatably inserted into the shaft opening 112 in the upper wall of the main body. The shaft 211 is rotatably inserted into the shaft opening 112 and the annular sleeve 1120. Ball bearings 213 (located on the outer circumference of the shaft 211) are arranged between the lower wall 21 of the rotatable part 200 and the bearing recesses 113 on the outer circumference of the shaft opening 112 on the upper wall 111 of the main body. The ball bearings 213 roll in engagement with the circularly arranged bearing recesses 113, facilitating the rotation of the rotatable part 200 and forming a rotation limiter. It is understood that the bearing recesses 113 can also be arranged on the outer circumference of the shaft 211 on the lower wall of the rotatable part 200.An end cap 180 is located inside the housing 110 and can be firmly connected to the end of the shaft 211 to ensure that the shaft 211 can rotate in the shaft opening 112 without detaching from the top of the housing 110. A through-opening 183 is formed in the center of the end cap 180, through which the water conduit 400 passes. As a non-limiting example, the end cap 180 comprises a circular upper plate 181 and a circular lower plate 182, which are firmly connected to each other, with the circular upper plate 181 being inserted into and firmly seated in the lower end of the hollow shaft 211. The circular lower plate 182 has a larger diameter than the circular upper plate 181, forming an annular groove 184 between the circular lower plate 182 and the upper plate 181.The circular lower plate 182 further comprises an annular flange 1810 with a diameter larger than the shaft opening 112 (or larger than the end diameter of the annular sleeve 1120), such that the circular lower plate 182 abuts the outside of the shaft opening 112 (or the open end of the annular sleeve 1120) to limit the position of the shaft 211. The lower end of the hollow shaft 211 rests within the annular groove 184.

[0036] A projection 115 is arranged outside the shaft opening 112 on the upper wall 111 of the main body (housing 110). The projection 115 is preferably an arc-shaped element surrounding the shaft opening 112 and is located between the annular flange 1121 and the circle of bearing recesses 113. The projection 115 can push a guide rod 221 upwards, thereby engaging a position switch 223 (see Fig. 7, Fig. 9, Fig. 11 and Fig. 13) is triggered on the second control board 220, thereby achieving a function switch, for example, a switch between the coffee brewing function and the power bank discharge function. When the coffee machine is in its stowed state, the guide rod 221 rotates together with the rotatable part 200 until it disengages from the projection 115, for example, the guide rod 221 moves to a position outside the shaft opening 112 and opposite the projection 115 (as in Fig. (as shown in Figure 1), while the guide rod 221 moves downwards under the spring force of a spring 223 on the guide rod and no longer presses on the position switch 223, the coffee brewing function is not activated, and the coffee machine can now be used as a power supply, for example as a power bank, to charge external electronic devices. It is understood that by setting the projections 115 in different positions, switching and activating further functions is made possible. These functions are implemented by setting corresponding function modules on the first control board 150 and / or the second control board 220. A recess 1150 for positioning the lower end of the guide rod 221 can be formed on the projection 115.

[0037] A mounting bracket 190 is provided within the main body 100. The water pump 130, the battery 140, and the first control board 150 are mounted within the main body 100 via the mounting bracket 190. The mounting bracket 190 includes an upper plate 191, which can be a horizontal plate (relative to the orientation of the main body when it is upright). An annular mounting receptacle 192, designed for the water reservoir 170, is arranged on the upper plate 191. The bottom of the water reservoir fits into the annular receptacle 192, allowing the water reservoir 170 to be mounted on top of the mounting bracket 190.A through-opening 193 is provided in the side wall of the ring-shaped bracket 192, and the shaft opening 193 is connected to a through-opening 172 in the lower wall (electric heating plate 161) of the water tank 170 and a water inlet pipe 131 of the water pump 130, allowing water to flow from the water tank 170 into the water pump 130.

[0038] In one embodiment, the electric heating module 160 is a circular heating plate structure that serves as the lower wall of the water reservoir 170 and is adapted to and fits into the annular receptacle 192 of the upper plate 191 of the bracket. The electric heating module 160 comprises a circular plate 161, a first annular element 162, and a second annular element 163. The first annular element 162 and the second annular element 163 seal the circular plate 161 against the water reservoir 170 to form the lower wall of the water reservoir, thereby rapidly heating the water in the water reservoir 170. An annular groove 164 is formed on the first annular element 162 to receive the annular lower end of the water reservoir 170.The second annular element 163 has an annular groove for securing the circular plate 161 in the annular receptacle 192 on the upper plate 191 of the bracket 190, and fasteners such as screws can be used to further secure the circular plate 161 to the bracket 190. It is understood that the circular plate 161 and / or the first annular element 162 and / or the second annular element 163 are electrical heating elements that are electrically connected to the first control board 150 and generate heat when current is applied. Two or three of the circular plate 161, the first annular element 162, and the second annular element 163 can be separate or integrated.The lower wall (in this embodiment, the electric heating module 160) of the water tank 170 defines through-openings, one through-opening 172 being in fluid communication with the water pump 130 to allow water to flow from the water tank 170 into the water pump 130, and another through-opening serving to install a temperature sensor 173 to measure the temperature of the water or the electric heating module 160. The detected temperature is transmitted to the first control board 150. The first control board 150 controls the current (or heating power) of the electric heating module 160. In some specific embodiments, the electric heating module 160 at the bottom of the water tank is a high-performance electric heating module to achieve rapid heating of cold water, improve heating performance, and significantly enhance the user experience.The electric heating module 160 is electrically connected to the first control board 150, and the temperature sensor 173 is used to monitor and control the temperature. The temperature sensor 173 is connected to the first control board 150. The coffee maker of the present application uses a high-performance battery 140 with a high discharge rate and a high-performance electric heating module 160 to heat water quickly, which significantly improves the heating performance compared to existing coffee makers. For example, three high-performance batteries 140 are provided in the main body, each having a voltage of 3.7 V and a capacity of 7000 mAh. When the three high-performance batteries 140 are connected in series, the total voltage is 11.1 V. When the high-performance batteries are discharged at a discharge rate of 3C, the output current is 21 A (7000 mAh × 3 = 21000 mAh).The product of current and voltage gives the power: 11.1 × 21 = 233.1 W. This allows 60 ml of water to be heated from room temperature to 92 °C in about one minute, with 92 °C being the optimal temperature for coffee extraction, but 86-95 °C are also suitable.

[0039] The bracket 190 is attached to the lower wall 116 of the housing 110. The space between the upper plate 191 of the bracket and the lower wall 116 is used for installing the water pump 130, the battery 140, and the first control board 150. The bracket 190 can secure the water pump 130, the battery 140, and the first control board 150 within the housing 110 using a clamping mechanism or fasteners. The water pump 130 is located below the water tank 170 and is connected to it via a pipe.

[0040] One or more batteries 140 can be housed in the main body 100. The battery can be a primary battery, preferably a rechargeable battery, and more preferably a high-capacity rechargeable battery. For example, the battery capacity can be greater than 20,000 mAh, enabling the rapid heating of cold water to meet the demand for preparing multiple servings of hot coffee. Furthermore, the high-capacity battery allows the coffee maker to function as a power supply (or power bank) to provide power that can be used to charge electronic devices such as mobile devices. In the coffee maker of the present application, the rotatable part 200, which serves as the upper shell of the main body 100, is rotatable relative to the main body. The interior of the main body is sufficiently large to accommodate batteries with a capacity greater than 20,000 mAh.In one embodiment, the battery 140 is a high-performance battery with a high discharge rate and large capacity, which significantly improves heating performance. As a non-limiting example, three batteries connected in series, each with a voltage of 3.7 V and a capacity of 7000 mAh, at a nominal voltage of 11.1 V and a discharge rate of 3C, can heat water from room temperature to 92 °C within a few minutes. To solve the problem of the long heating time of existing coffee makers, the coffee maker of the present application uses high-performance batteries with a high discharge rate and large capacity to increase heating performance. The heating performance is increased by more than 2.5 times, and the water heating time is reduced to about two minutes, which significantly improves user-friendliness.

[0041] A fan 120 is arranged inside the main body 100 for heat dissipation. The fan 120 is electrically connected to the first control board 150 and is controlled by the first control board 150 to operate. The housing 110 of the main body is provided with a plurality of air inlets 124 and a plurality of air outlets 125. For example, the air inlets 124 and the air outlets 125 are defined in the lower wall 116 and each consists of a group of continuous fine openings distributed in a circular area to form a honeycomb pattern. The fan 120 is installed inside the housing behind the air inlets 124. When the fan 120 is started, air from outside the main body is drawn into the main body through the air inlets 124.The hot air, which has absorbed heat in the main body, flows along an airflow path 126 within the main body 100 and is expelled from the main body 100 through the air outlets 125. A partition plate 123 is arranged on the lower wall 116. The partition plate 123 extends upwards from the lower wall 116 (for example, but not limited to, perpendicular to the lower wall) and is located below the upper plate 191 of the bracket, thereby dividing the interior space in the housing 110 (the space between the upper plate 191 of the bracket and the lower wall 116) into two parts: an air inlet side (on the side of the air inlets 124) and an air outlet side (on the side of the air outlets 125). The air inlets 124 and the air outlets 125 are located on both sides of the partition plate 123 and form a U-shaped airflow path 126 (see . Fig. 1-2, 10, 14) within the housing 110 (in the space below the upper plate 191 of the bracket). The U-shaped airflow path 126 extends from the air inlets 124 on the air inlet side to the air outlets 125 on the air outlet side within the space below the upper plate 191 of the bracket. The battery 140, the first control board 150, the water pump 130, and the electric heating module 160 are all located within the housing 110, specifically within the space below the upper plate 191 of the bracket. These components are all within an airflow area of ​​the U-shaped airflow path 126, thus ensuring effective heat dissipation from components such as the battery 140 and the first control board 150. As a non-restrictive example, the battery 140, the water pump 130, the electric heating module 160 and the like are located above the air outlets 125 and on the air outlet side of the partition plate.The fan 120 is positioned above the air inlets 124 and on the air inlet side of the partition plate. The first control board 150 is supported by the partition plate 123 and the bracket 190 and can span the left and right spaces (air inlet side and air outlet side) separated by the partition plate 123.

[0042] The air inlets 124, the air outlets 125, the U-shaped airflow path 126, and the fan 120 form a heat dissipation system within the main body 100 of the coffee machine. When the fan 120 is activated, air from outside the coffee machine is drawn into the housing 110 through the air inlets 124, flows along the U-shaped airflow path 126, exchanges heat within the main body 100 to form hot air, and the hot air is then discharged from the coffee machine through the air outlets 125. This heat dissipation system effectively solves the problem of high temperatures within the main body.It is understood that the air inlets 124 and the air outlets 125 can also be arranged at other positions of the housing 110, for example in the cylindrical side wall 114, and the partition plate 123 is arranged accordingly to divide the interior space within the housing into an air inlet side and an air outlet side in order to form a U-shaped airflow path for heat dissipation.

[0043] To solve the problem of excessive internal temperature in the coffee machine due to the high heating power, the fan 120 is provided, and the U-shaped airflow path 126 is formed inside the main body 100 to ensure effective heat dissipation from components such as the battery 140 and the control board 150.

[0044] In some specific embodiments, the first control board 150 is provided with a plurality of electrical interfaces 151, indicator lights 152, and a keypad module 153. The housing 110 of the main body 100 defines an opening 118. The first control board 150 is installed behind the opening 118, and the plurality of electrical interfaces 151, the plurality of indicator lights 152, and the keypad module 153 extend from the first control board 150 toward the opening 118 and are exposed on the main body 100 to allow for easy operation or display. The electrical interfaces 151, the indicator lights 152, and the keypad module 153 are secured in the opening 118 by means of a light guide plate 155 and a retaining ring 154. For example, the opening 118 is provided on the front of the main body, i.e., on the front of the cylindrical side wall 114.The numerous electrical interfaces 151 include charging and discharging interfaces or have charging and discharging functions and may also include a communication interface. The charging interface can be used to charge the battery 140. The discharging interface, as a power output connection, allows the battery 140 to charge other electronic devices. The communication interface can be used for data or signal transmission. The numerous indicator lights 152 can be used to display the charge level of the battery 140 and the operating status of the coffee machine. For example, the numerous indicator lights 152 can display the remaining battery power by the number of illuminated lights and can also be used to display the coffee brewing time. These functions are controlled and configured on the first control board 15.

[0045] In the embodiment of the present application, a large-capacity battery 140 is used, and the first control board 150 includes a charging module. Via the electrical interface 151, which is electrically connected to the first control board 150, the device (the large-capacity battery 140) can be used to charge electronic devices such as mobile devices without the need to carry an additional mobile power supply (power bank).

[0046] In one embodiment, the first control board 150 primarily implements the power bank function and supplies power to the second control board 220. The second control board 220 primarily implements the coffee brewing function.

[0047] The water pump 130 is equipped with a water inlet pipe 131 and a water outlet pipe 132. The water inlet pipe 131 is connected to the water tank 170, and the water outlet pipe 132 is connected to the water line 400. The water line 400 extends within the main body 100, passes through the hollow shaft 211 in the shaft opening 122, and extends into the rotatable part 200, where it reaches the circular receptacle of the rotatable part. A pipe coupling for connecting the end of the water line 400 is installed in a through-opening 219 in the circular receptacle 214 on the second side 202 of the rotatable part 200 and is in fluid communication with a water inlet of the extraction head 300 when connected to the circular receptacle 214. Both ends (an inlet end and an outlet end) of the 400 mm water pipe are connected with a pipe coupling that can be rotated 360 degrees.The inlet end of the water pipe 400 is connected to the water outlet pipe 132 of the water pump 130 via a pipe coupling, and the outlet end of the water pipe 400 is installed in the through-opening 219 in the circular receptacle 214 of the rotatable part 200 via another pipe coupling 410 to supply the extraction head 300 with water.

[0048] In the embodiment shown in the figures, the rotatable part 200 serves as the upper shell of the cylindrical main body 100 of the coffee machine, thereby optimizing the interior of the main body 100 and providing more space for the battery. The rotatable part 200 comprises a housing 210 and a second control board 220, which is arranged inside the housing 210. The housing 210 has a shape corresponding to the housing 110 of the main body, and the second control board 220 is arranged inside the housing 210. An upper cover 230 covers the open top of the housing 210 to protect the second control board 220.

[0049] With reference to Fig.4 The lower wall 21 of the housing 210 is adapted to the upper wall 111 of the main body 100. The hollow shaft 211 is provided on the lower wall 21 of the second side 202 of the rotatable part 200 and extends downwards. The hollow shaft 211 is in contact with the interior of the housing 210, so that the water line 400 can project through the hollow shaft 211 into the interior of the housing 210 and reach the circular receptacle 214 on the second side 202, thus directing water to the extraction head 300. The lower wall 21 of the rotatable part 200 is provided with an annular groove 217 and an arcuate groove 215 on the outer circumference of the hollow shaft 211.The hollow shaft 211 of the rotatable part 200 is inserted into the shaft opening 112 in the upper wall 111 of the main body 100 and rotates, with the annular flange 1121 engaging slidably around the shaft opening 112 on the upper wall 111 of the main body along the annular groove 217, and the projection 115 on the outer circumference of the shaft opening 112 on the upper wall 111 of the main body engaging slidably in the arcuate groove 215. Ball bearings 213 are arranged between the lower wall 21 of the rotatable part 200 and the upper wall 111 of the main body 100 to form a rolling fit and limit rotation. As a non-restrictive example, the arcuate groove 215 is a semicircle, i.e., the rotatable part 200 can rotate 180 degrees. An arc-shaped flange 216 is located between the arc-shaped groove 215 and the annular groove 217.The two ends of the arc-shaped groove 215 form a starting recess 2151 and a stopping recess 2150, respectively, corresponding to the stowed and working positions of the rotatable part 200. These recesses facilitate the positioning of the projection 115 in the stowed and working positions. As a non-limiting example, ball bearings 213 are provided at the stopping recess 2150, for instance, two spaced-apart ball bearings, which facilitate interaction with the projection 115 to push the guide rod 221 upwards. Corresponding to the bearing recesses 113 on the upper wall 111 of the main body 100, ball bearings 213 are provided on the lower wall 21 of the rotatable part 200 and roll in engagement within the bearing recesses 113. A plurality of hollow columns 212 can be provided on the lower wall of the rotatable part 200.The lower ends of the hollow columns 212 protrude through the lower wall, allowing the open lower ends to accommodate and define the ball bearings 213. The upper ends of the hollow columns 212 extend upwards within the housing 210 and can be used to support the second control board 220. One of the hollow columns serves to accommodate and guide the guide rod 221 and the spring 222 located outside the guide rod. One end of the spring 222 abuts a flange 2210 on the guide rod, and the other end can rest against the second control board 220.

[0050] The lower wall of the housing 210 defines a through-opening 218 on the first side 201, which communicates with the hollow shaft 211, the space within the housing 210, and a through-opening defined in the second control board 220, allowing the water pipe 400 to pass through. A cylindrical circular receptacle 214 is provided on the lower wall of the housing 210 on the second side 202 for the detachable connection of the extraction head 300. For example, an annular side wall of the circular receptacle 214 is provided with an internal thread, and the extraction head 300 is provided with an external thread. The extraction head 300 is screwed into or out of the circular receptacle 214 by turning it. Of course, a detachable fastening method such as a clamping or clamping connection can also be used.An upper wall of the circular container 214 defines a through-opening 219 for installing the pipe coupling 410 of the water line 400, and the pipe coupling 410 is in fluid communication with the water line 400 and the extraction head 300. When coffee powder is placed in the extraction head 300, hot water is passed through the water line 400 and the pipe coupling 410 into the extraction head 300 to brew coffee. When a coffee capsule is placed in the extraction head 300, the pipe coupling 410 also connects to a hollow needle 40, and the needle tip of the hollow needle 40 pierces the capsule. Lateral injection openings 41 are formed in the needle tip of the hollow needle 40. Water from the water line 400 flows through the pipe coupling 410 into the hollow needle 40 and is then injected from the side injection opening 41 of the needle tip into the capsule to dissolve and extract the coffee powder in the capsule.For example, several lateral injection ports 41 are defined in the side of the needle tip, causing the hot water to exit with higher pressure and stronger effect, so that the hot water comes into full contact with the coffee powder and effectively dissolves and extracts the coffee powder.

[0051] The function of the second control board 220, for example, is primarily to implement the coffee brewing function, and it can be equipped with a temperature control function module and a time control function module to set the water temperature and time during the coffee brewing process. Setting buttons (not shown), electrically connected to the second control board 220, can be located on the top cover 230 to adjust the water temperature and / or time during the coffee brewing process.

[0052] The second control board 220 is equipped with a position switch 223, which is specifically located on the underside of the second control board 220 (towards the main body 100). The guide rod 221 moves upwards to press against the position switch 223 and start the coffee brewing function. The guide rod 221 moves downwards to release the position switch 223 and stop the coffee brewing function. At this point, the system can be switched to the power bank discharge function, and the first control board 150 in the main body 100 controls the use of the high-capacity battery 140 as a power bank to charge electronic devices via the electrical interface 151. The hollow column 212 is attached to the lower wall 21 of the housing 210 to accommodate the guide rod 221 and rotate together with the rotating part 200.A spring 222 is arranged outside the guide rod 221, and both are inserted together into the hollow column 212. The rotatable part 200 rotates and drives the guide rod 221 to rotate together with the shaft 211 in the shaft opening 112. The rotatable part 200 rotates and drives the guide rod 221 to rotate with it. When it rotates into a certain position (e.g.,(When the rotating part 200 rotates 180 degrees), the guide rod 221 moves onto the projection 115 on the upper wall 111 of the main body. The projection 115 lifts the guide rod 221 to press the position switch 223, which switches between the coffee brewing function and the power bank discharge function and activates the coffee brewing function (the electric heating module 160 is powered to heat the water in the water reservoir 170 to a preset water temperature, and the water pump delivers the hot water to the extraction head 300 to dissolve and extract the coffee grounds). Simultaneously, the spring 222 is compressed as the guide rod 221 moves upwards. When the rotating part 200 rotates backward, the lower end of the guide rod 221 leaves the projection 115, and the guide rod 221 moves downward under the spring force of the spring 222 to release the position switch 223.When the rotating part 200 rotates into the stowed position (rotates back 180 degrees), the projection 115 is located at the starting end of the arcuate groove 215. When the rotating part 200 rotates into the working position, the projection 115 is located at the stopping end of the arcuate groove 215. The arcuate groove 215 is, for example, a semicircle.

[0053] The extraction head 300 can have a prior art structure with an extraction chamber for filling with ground coffee or a coffee capsule. The extraction head 300 has a water inlet at the top and a liquid outlet at the bottom. The pipe coupling 410 of the water line 400 is connected to the water inlet to inject water into the extraction chamber. The water injected into the extraction chamber dissolves and extracts the ground coffee, and the prepared coffee liquid is dispensed through the liquid outlet at the bottom. The pipe coupling 410 can also be connected to the aforementioned hollow needle 40 to pierce the coffee capsule.

[0054] During operation, the rotating part 200 is turned away from the top of the main body 100 to expose the water reservoir 170; that is, the second side 202 is turned out from the top of the main body. The extraction head 300 in the water reservoir 170 is removed and connected to the circular receptacle 214 of the rotating part. Water is injected into the water reservoir 170, and the rotating part is turned into the working position. At this point, the guide rod 221 in the rotating part 200 presses the position switch 223 on the second control board 220 in the rotating part 200 to activate the coffee brewing function. The first control board 150 controls the electric heating module 160, supplying it with power and heating the water in the water reservoir 170 to a preset temperature.The first control board 150 activates the water pump 130 to pump hot water to the extraction head 300, which dissolves and extracts the coffee grounds. The coffee can be dispensed after a preset steeping time. After brewing, the extraction head is removed and placed in the water reservoir 170. Then, the rotating part 200 is rotated back over the water reservoir on top of the main body 100. When the machine is stored, the guide rod 221 releases the position switch 223, and the coffee maker enters a state where it can supply power externally (i.e., the power bank discharge function), which can be used to charge electronic devices.

[0055] In the embodiment described above, the second control board 220 is arranged within the rotatable part 200, and the first control board 150 is connected to the second control board 220. The circular receptacle 214 for assembling the extraction head 300 and the hollow shaft 211 are arranged side by side on the lower wall of the rotatable part 200. The circular receptacle 214 is provided with the pipe coupling 410 (the pipe coupling 410 can also be connected to a hollow needle 40). The water reservoir 170 is connected to the water inlet pipe 131 of the water pump 130 via the water line 400. The water outlet pipe 132 of the water pump 130 is in fluid communication with the extraction head mounted in the circular receptacle 214 via the water line 400 and the pipe coupling 410.The liquid outlet connected to the extraction chamber is located on the underside of the extraction head 300. The extraction head 300 is detachably connected to the circular container 214 and, after removal, can be inserted into the water reservoir 170. The rotatable part 200 can be rotated horizontally 180 degrees relative to the main body 100, allowing the extraction head 300 to be conveniently installed in the circular receptacle 214 of the rotatable part during use. The hollow needle 40 pierces the coffee capsule placed in the extraction chamber 31 of the extraction head 300. Hot water is then pumped from the water reservoir 170 into the hollow needle 40 via the water pump 130 and injected through the side injection port 41 of the hollow needle 40 into the extraction chamber or the coffee capsule of the extraction head, thereby dissolving and extracting the coffee grounds.The hollow needle 40 can pierce various coffee capsules, allowing users to choose between different coffee flavors. When not in use, the extraction head 300 can be removed and placed in the water tank 170 for storage, after which the rotating part 200 is turned 180 degrees horizontally relative to the main body 100 to return to its original stored position.

[0056] In the embodiment of the present application, the upper wall 111 of the main body 100 defines the water tank mounting opening 117 and the shaft opening 112 adjacent to each other. The water tank 170 is arranged in the water tank mounting opening 117. The hollow shaft 211 is arranged at the bottom of the rotatable part 200. An upper circular plate 181 of the end cap 180 is inserted into the hollow shaft 211. The hollow shaft 211 extends into the shaft opening 112, its lower end being connected to the lower circular plate 182 of the end cap and abutting the circumference of the shaft opening 112. The upper circular plate 181 is firmly connected to the lower circular plate 182 and firmly connected to the lower end of the hollow shaft 211, so that the rotatable part 200 can rotate stably relative to the main body 100 without detaching from the main body.

[0057] The open top of the water tank 170 can be covered with the lid 301; the bottom of the water tank 170 is provided with two through-holes. One through-hole 172 is connected to the water inlet pipe 131 of the water pump 130, allowing water from the water tank 170 to flow into the water pump 130. The temperature sensor 173 is inserted into the other through-hole to monitor the temperature of the water in the water tank 170.

[0058] The plurality of hemispherical bearing recesses 113, arranged at equal intervals in a circle, and the projection 115 are arranged on the upper wall 111 of the housing 110 around the shaft opening 112. The recess 1150 is formed on the projection 115; a semicircular groove (arc-shaped groove) 215 is provided on the lower wall 21 of the rotatable part 200 and on the outer circumference of the hollow shaft 211. The raised hemisphere (or ball bearing) 213 is embedded in the semicircular groove (arc-shaped groove) 215, thereby effectively preventing misalignment of the rotation of the rotatable part.

[0059] In some specific embodiments, the guide rod 221 is arranged in the rotatable part 200, and the spring 222 is located outside the guide rod 221; the second control board 220 is provided with the position switch 223. When the lower end of the guide rod 221 moves onto the projection 115, the guide rod 221 is raised, and its upper end presses on the position switch 223, thereby switching the coffee maker into coffee brewing mode. At this point, the power bank discharge mode is deactivated; when the guide rod 221 moves away from the position switch 223, the coffee maker switches into power bank discharge mode.The position switch 223 on the second control board 220 is used to switch between the power bank discharge mode and the coffee preparation mode, thus avoiding voltage instability caused by the simultaneous use of both functions (coffee preparation function and power bank discharge function).

[0060] When using the coffee machine to prepare coffee, the rotating part 200 is first turned 180 degrees horizontally relative to the main body 100. A coffee capsule (which can serve as an extraction chamber) is inserted into the extraction head 300, or ground coffee is placed into the extraction chamber of the extraction head. The extraction head is then inserted into the circular receptacle 214 of the rotating part via a screw connection. If a coffee capsule is inserted, the hollow needle 40 pierces the capsule. Pressing the power switch activates the electric heating module 160 in the coffee machine to heat the cold water in the water reservoir 170.Once the temperature sensor has detected that the water in the water reservoir 170 has reached the preset temperature, the hot water in the water reservoir 170 is pressurized by the water pump 130 and injected into the extraction chamber for coffee extraction through the pipe coupling 410 of the water line 400 (or via the side injection port 41 of the hollow needle 40 connected to the pipe coupling 410). The extracted coffee liquid flows out of the liquid outlet connected to the extraction chamber, thus completing the coffee preparation. When the coffee machine is not in use, the extraction head 300 can be removed and placed in the water reservoir 170, after which the rotating part 200 is rotated 180 degrees horizontally relative to the main body 100 to return to its original storage position.During the brewing process, the user simply needs to touch the on / off button on the keypad module 153 to start brewing. The user can also adjust the time / temperature by pressing the time / temperature setting button on the top cover 230 of the rotating part 200 to customize the temperature to their preferred coffee taste, making brewing quick and easy. If the user's mobile device runs out of power, a data cable can be plugged into the power output (electrical interface) 151 on the main unit to charge the device, allowing the coffee maker to function as a power bank.

[0061] In the embodiment described above, the coffee maker is designed as a cylinder, and its upper shell is rotatable, allowing it to be rotated away from the main body to utilize the external space for installing the extraction head for coffee preparation. The interior of the main body 100 remains unoccupied, thus optimizing the coffee maker's internal space and leaving more room for the battery 140. The battery capacity can be 20,000 mAh or more, which is 2.5 to 3 times the capacity of existing coffee makers on the market. Since mobile phones and other small electronic devices may need to be charged when used outdoors, the coffee maker can be used with a power bank discharge function to charge these devices. The coffee maker of the present application is portable and meets the charging needs of consumers.

[0062] To solve the problem of long heating times in existing products, the coffee machine of the present application has a high-capacity, high-discharge-rate power battery that increases the heating power supplied to the electric heating module 160 by more than 2.5 times, thereby reducing the water heating time to about two minutes and significantly improving the user experience.

[0063] To solve the problem of excessive internal temperature in the product caused by the high-performance heating element, the coffee machine of the present application is equipped with an additional fan 120. A U-shaped airflow path 126 is provided within the coffee machine, and the heat dissipation area essentially covers the electronic components, thereby ensuring effective heat dissipation for components such as the battery 140 and the circuit board 150.

[0064] The coffee machine of the present application can be switched between the coffee brewing function and the power bank discharge function via the position switch 223. When the upper rotatable part 200 is turned to a preset position, the power bank discharge function and the coffee brewing function can be switched by touching the position switch 223, and the power bank discharge function can be deactivated or restricted when switching to the coffee brewing function.

[0065] The present application optimizes the shape and dimensions of the extraction head 300 and the water tank 170 in order to accommodate the extraction head 300 within the water tank 170. In this stowed state, the extraction head can be placed inside the machine, making it more convenient to use.

[0066] In other embodiments, an opening or a closable side cover is provided on the side wall 114 of the main body 100 at a position corresponding to the water reservoir 170. The rotatable part 200 is rotated and mounted at the position where the water reservoir is located. The water reservoir 170 and the extraction head 300, together with the rotatable part 200, can be rotated away from or back into position within the main body 100. After being rotated away, the water reservoir 170 can be removed and placed on top of the holder 190, after which the coffee preparation process can be carried out.

[0067] The technical features of the aforementioned embodiments can be combined in any way. To keep the description simple, not all possible combinations of the technical features in the aforementioned embodiments are described. However, as long as there are no contradictions in the combination of these technical features, this is considered to be the scope described in this description.

[0068] The examples mentioned above represent only some embodiments of the present invention, and their descriptions are specific and detailed, but should not be interpreted as limiting the scope of the patent. It should be noted that, for those skilled in the art, several modifications and improvements could also be made without departing from the concept of the present invention, all of which would fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for the present invention should be governed by the attached claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CH 202520038697.5

[0001]

Claims

[1] Coffee machine, comprehensive: a main body, comprising: a water container for holding water; a first control board; a battery; an electric heating module for heating water in the water tank; and a water pump that is in fluid connection with the water reservoir; a rotatable part that serves as the upper shell of the main body and is rotatable relative to the main body between a stowing position and an operating position; wherein a hollow shaft is provided on a first side of the rotatable part, rotatably connected to the main body, and a circular receptacle is provided on a second side of the rotatable part, arranged next to the hollow shaft; and an extraction head which is located in the water reservoir when the coffee machine is in a stowed state according to the stowing position, and which is detachably connected to the circular receptacle of the rotating part when the coffee machine is in an operating state for preparing coffee according to the operating position of the rotating part; wherein the first control board is electrically connected to the battery, the electric heating module and the water pump, all of which are arranged within a housing of the main body; wherein, in the stowed state of the coffee machine, the rotatable part rests on an upper wall of the main body, with the circular receptacle located above the water reservoir; wherein, in the operating state, the second side of the rotatable part rotates away from the main body, the circular receptacle moves away from the main body and exposes the water reservoir; and the water pump is in fluid communication with the water reservoir and the extraction head connected to the circular receptacle and pumps water from the water reservoir to the extraction head for the preparation of coffee. [2] Coffee machine according to claim 1, wherein the first control board has a power bank discharge function module for charging an electronic device, whereby the coffee machine is switchable between a coffee preparation function and a power bank discharge function for supplying power to the electronic device. [3] Coffee machine according to claim 2, wherein the battery capacity is greater than 20000 mAh; the first control board is equipped with a variety of electrical interfaces, a variety of indicator lights and a keypad module; the indicator lights being used to show a battery level or time during the coffee preparation process; The electrical interfaces include a charging interface and a discharging interface, and the first control board controls the battery so that it charges the electronic device via the discharging interface, thus realizing the power bank discharge function of the coffee machine; The housing of the main body defines an opening, with the first control board located behind the opening, and the multitude of electrical interfaces, the multitude of indicator lights, and the keypad module extend from the first control board towards the opening and are exposed on the main body for easy operation or display. [4] Coffee machine according to claim 2, wherein a second control board is provided within the rotatable part and is connected to the first control board to implement the coffee preparation function of the coffee machine; the second control board is provided with a position switch for triggering the coffee preparation function and / or the power bank discharge function. [5] Coffee machine according to claim 4, wherein the second control board is provided with a temperature control function module and / or a time control function module; setting buttons are arranged on a housing of the rotatable part, which are electrically connected to the second control board and are used to set temperature and / or time during a coffee preparation process; A guide rod is provided below the position switch, which is connected to a compressible spring; wherein the guide rod is movable up and down to press or release the position switch; the upper wall of the main body defines a shaft opening and a water tank mounting opening side by side; the hollow shaft extends rotatably through the shaft opening inside the housing of the main body; the water tank is installed inside the housing of the main body, with the open top of the water tank being received in the water tank mounting opening. [6] Coffee machine according to claim 5, wherein the guide rod is installed in the rotatable part and is rotatable together with the rotatable part; a projection is provided on the upper wall of the main body; in the operating state, the guide rod rotates onto the projection, the projection pushing the guide rod upwards to press the position switch, thereby triggering the coffee brewing function and / or the power bank discharge function; and in the stowed state, the guide rod rotates away from the projection, and the spring drives the guide rod downwards to release the position switch; a hollow column is arranged through a lower wall of the rotatable part; the guide rod and the spring pushed onto the guide rod are inserted into the hollow column and are movable up and down along the hollow column; and the position switch is arranged on a base surface of the second control board opposite the hollow column; an annular groove is formed around the hollow shaft on a lower wall of the rotatable part, wherein an annular flange around the shaft opening on the upper wall of the main body is displaceable along the annular groove when the rotatable part rotates; an arcuate groove is formed on the outer circumference of the hollow shaft on the lower wall of the rotatable part; the projection is in displaceable engagement in the arcuate groove when the rotatable part rotates; Ball bearings are provided on an outer circumference of the hollow shaft, wherein a rolling fit is formed between the lower wall of the rotatable part and the upper wall of the main body; several bearing recesses, distributed around the circumference of the shaft opening, are formed on the upper wall of the main body; the ball bearings are in a rolling fit with the bearing recesses when the rotatable part rotates; The projection is an arc that corresponds to an outer circumference of the shaft opening and is located between the annular flange and a circle formed by the bearing recesses. [7] Coffee machine according to claim 1, wherein a lower end of the hollow shaft is connected to an end cap to limit axial movement of the hollow shaft, whereby the hollow shaft rotatably fits into the shaft opening without falling out; the end cap comprises a circular upper plate and a circular lower plate which are firmly connected to each other; the circular upper plate is inserted into the hollow shaft and is firmly seated; the circular lower plate comprises an annular side wall to form an annular groove between the circular lower plate and the circular upper plate; the lower end of the hollow shaft fits into the annular groove; the circular lower plate is clamped outside the shaft opening to confine the shaft; the shaft opening extends downwards to form an annular sleeve within the main body; the hollow shaft is inserted into the annular sleeve, and the circular lower plate is clamped outside an open lower end of the annular sleeve; a ring-shaped wall extends from the water tank mounting opening into the housing of the main body and is designed to accommodate the water tank; a through-opening is formed in the end cap, wherein the circular receptacle defines a through-opening which is in fluid communication with the extraction head connected to the circular receptacle; a water line connects the water pump and the circular receptacle through the through-opening in the end cap and the hollow shaft, wherein one end of the water line is connected to a water outlet pipe of the water pump via a pipe coupling and the other end of the water line is connected to the circular receptacle via another pipe coupling which is installed in the through-opening in the circular receptacle; The pipe couplings can be rotated 360 degrees. The pipe coupling installed in the through-opening in the circular receptacle is connected to a hollow needle, the hollow needle being used to inject water into the extraction head and to pierce a coffee capsule placed in the extraction head. [8] Coffee machine according to claim 1, wherein the electric heating module comprises an electric heating plate which serves as the lower wall of the water reservoir; a temperature sensor is provided to detect the water temperature in the water tank and is connected to the first control board to control the heating power supplied to the electric heating module; The heating power of the electric heating module and the capacity and discharge rate of the battery are configured so that the electric heating module is able to heat the water in the water tank to 86 to 95 °C within a few minutes. [9] Coffee machine according to claim 1, wherein a fan is installed in the main body, the housing of the main body defining air inlets and air outlets; a partition plate is provided between the air inlets and the air outlets, which divides a space within the housing into an air inlet side and an air outlet side and forms a U-shaped airflow path within the housing, extending from the air inlets on the air inlet side to the air outlets on the air outlet side; the fan is arranged behind the air inlets; the battery and the first control board are both arranged within a heat dissipation area of ​​the U-shaped airflow path; When the fan is activated, ambient air is drawn from the air inlets into the main body, flows along the U-shaped airflow path for heat exchange, and is then expelled from the air outlets of the main body. [10] Coffee machine according to claim 9, wherein a bracket is provided within the housing of the main body; the battery, the water pump, the first control board and the water reservoir are installed via the bracket within the main body; the bracket comprises a cover plate; an annular mounting receptacle is provided on the cover plate which is adapted to the water reservoir, wherein the lower wall of the water reservoir is mounted in the annular mounting receptacle and the water pump is located below the water reservoir; The lower wall of the water tank defines a through-opening for connecting a water inlet pipe of the water pump; the lower wall of the water tank defines another through-opening for installing a temperature sensor to detect the water temperature in the water tank; the air inlets and air outlets are defined in a lower wall of the main body, the partition plate is attached to the lower wall of the main body and extends upwards, and the first control board is supported on a top side of the partition plate.

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