Coffee machine

Abstract

The invention relates to a coffee machine which comprises a heat exchange structure, a temperature adjusting part, a brewing head, a liquid supply pump and a controller, and a heat exchange flow channel used for allowing liquid to flow through is formed in the heat exchange structure; the temperature adjusting part is used for heating and cooling liquid in the heat exchange runner; a brewing cavity is formed in the brewing head and used for containing coffee powder, and an outlet of the heat exchange runner communicates with the brewing cavity; the liquid supply pump at least can be used for pumping liquid in the heat exchange runner into the brewing cavity; the controller is electrically connected with the temperature adjusting piece and the liquid supply pump; the controller is used for controlling the temperature adjusting part to heat liquid in the heat exchange flow channel, pumping the heated liquid into the brewing cavity through the liquid supply pump so as to braise and steam coffee powder in the brewing cavity, and controlling the temperature adjusting part to cool the liquid in the heat exchange flow channel after braise and steam are completed. And the cooled liquid is pumped into the brewing cavity through the liquid supply pump so as to brew the coffee powder in the brewing cavity.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of coffee machines, in particular, to a coffee machine. BACKGROUND

[0002] Cold-brewed coffee is more and more favored by people due to its soft taste, obvious sweetness and aroma. The extraction method of cold-brewed coffee usually adopts cold-brewing method or ice-dripping method. The cold-brewing method generally adopts cold water to soak the ground coffee powder for a long time (usually 10-24 hours), and then filters the coffee residue to obtain coffee liquid. The ice-dripping method generally places ice blocks above a filter cup containing coffee powder, and uses water droplets formed by melting of the ice blocks to slowly soak the coffee powder drop by drop to obtain coffee liquid. The dripping time of the ice-dripping method is usually 6-8 hours, and the coffee needs to be placed for about 12 hours before being drunk after the dripping is completed.

[0003] In the related art, since the water temperature for making cold-brewed coffee is low, the water needs to be in contact with the coffee powder for a long enough time to make cold-brewed coffee with good taste, so there is a problem of long time consumption in the making process of cold-brewed coffee. SUMMARY

[0004] The purpose of the present disclosure is to provide a coffee machine to solve the above technical problems.

[0005] To achieve the above purpose, the present disclosure provides a coffee machine, comprising:

[0006] A heat exchange structure, which has a heat exchange channel formed therein for flowing liquid therethrough;

[0007] A temperature adjusting member for heating and cooling the liquid in the heat exchange channel;

[0008] A brewing head, which has a brewing cavity formed therein for containing coffee powder, and the outlet of the heat exchange channel is in communication with the brewing cavity;

[0009] A liquid supply pump, which is configured to at least pump the liquid in the heat exchange channel into the brewing cavity;

[0010] A controller, which is electrically connected with the temperature adjusting member and the liquid supply pump;

[0011] The controller is configured to control the temperature adjusting member to heat the liquid in the heat exchange channel, and pump the heated liquid into the brewing cavity through the liquid supply pump to steam the coffee powder in the brewing cavity, and after the steaming is completed, control the temperature adjusting member to cool the liquid in the heat exchange channel, and pump the cooled liquid into the brewing cavity through the liquid supply pump to brew the coffee powder in the brewing cavity.

[0012] Optionally, the coffee machine further comprises a liquid outlet channel, a first end of the liquid outlet channel being in communication with the outlet of the heat exchange channel, and a second end of the liquid outlet channel being in communication with the brewing chamber.

[0013] The liquid supply pump is further capable of pumping the liquid in the liquid outlet channel from the second end of the liquid outlet channel towards the first end of the liquid outlet channel.

[0014] The controller is further configured to, after the heated liquid is pumped into the brewing chamber by the liquid supply pump, control the liquid supply pump to pump the remaining liquid in the liquid outlet channel into the heat exchange channel.

[0015] Optionally, the heating of the liquid in the heat exchange channel by the temperature regulating component is controlled by the controller to comprise:

[0016] heating the liquid in the heat exchange channel to 40-60℃.

[0017] The cooling of the liquid in the heat exchange channel by the temperature regulating component is controlled by the controller to comprise:

[0018] cooling the liquid in the heat exchange channel to 4-10℃.

[0019] Optionally, the temperature regulating component is a semiconductor refrigeration sheet having opposite first and second surfaces, the first surface being in thermal contact with the heat exchange structure, and the semiconductor refrigeration sheet further having first and second terminals for connection to an electrical circuit.

[0020] The first surface is capable of absorbing heat from the liquid in the heat exchange channel when an electrical current flows from the first terminal to the second terminal, and capable of releasing heat to the liquid in the heat exchange channel when an electrical current flows from the second terminal to the first terminal.

[0021] Optionally, the coffee machine further comprises a heat dissipation structure and a gland, the heat dissipation structure being in thermal contact with the second surface, the heat exchange structure and the semiconductor refrigeration sheet being clamped between the gland and the heat dissipation structure, and a fastener passing through the gland and the heat dissipation structure to connect the gland and the heat dissipation structure.

[0022] Optionally, the liquid supply pump is a peristaltic pump, and the flow rate of the peristaltic pump is 0.01-0.6ml / s.

[0023] Optionally, the coffee machine further comprises a water injection assembly, the water injection assembly comprising a driving member and a water injection pipe, the water injection pipe being located above the brewing chamber and in communication with the outlet of the heat exchange flow channel, the driving member being configured to drive the water injection pipe to rotate around the central axis of the brewing chamber, the water injection pipe comprising a radial extension section extending along a radial direction of the brewing chamber, the radial extension section being provided with water injection holes for injecting water into the brewing chamber;

[0024] The water injection holes are multiple, the multiple water injection holes are arranged at intervals along the extension direction of the radial extension section, and the diameters of the multiple water injection holes gradually increase in the direction from one end of the radial extension section close to the central axis of the brewing chamber to the other end of the radial extension section away from the central axis of the brewing chamber; or the water injection holes are arranged at the other end of the radial extension section away from the central axis of the brewing chamber.

[0025] Optionally, the water injection pipe further comprises an axial extension section connected with the radial extension section, the central axis of the axial extension section coincides with the central axis of the brewing chamber, and the water injection assembly further comprises a transmission assembly, the driving member is in transmission connection with the axial extension section through the transmission assembly.

[0026] The other end of the axial extension section away from the radial extension section is provided with a water inlet, the water injection assembly further comprises a liquid outlet member, the liquid outlet member is provided with a water outlet, the outlet of the heat exchange flow channel is in communication with the water outlet, the water outlet is located above the water inlet and is arranged at intervals with the water inlet, and the projection of the water inlet along the up-down direction covers the projection of the water outlet along the up-down direction.

[0027] The radial extension section is provided with a water overflow hole, and the water overflow hole is located at the end of the radial extension section away from the axial extension section.

[0028] Optionally, the coffee machine comprises a machine body, the machine body comprising a machine body main body, a head portion protruding from the machine body main body, and a neck portion between the machine body main body and the head portion.

[0029] The heat exchange structure, the temperature adjusting member, and the liquid supply pump are all mounted on the machine body main body, and the brewing head is connected to the head portion.

[0030] The neck portion comprises a rotary knob shell, the rotary knob shell being rotatably connected between the machine body main body and the head portion, the rotary knob shell being provided with a rotary encoder inside, the rotary encoder being in transmission connection with the rotary knob shell, and the controller being in electrical connection with the rotary encoder.

[0031] Optionally, a first transmission gear is arranged on the inner circumferential surface of the knob shell, and a second transmission gear and a transmission shaft are further arranged inside the knob shell, the first transmission gear is engaged with the second transmission gear, and the transmission shaft is connected with the second transmission gear and the rotary encoder.

[0032] By the technical solution, the temperature adjusting member in the coffee machine can heat and cool the liquid, so that the coffee powder can be steamed by the heated liquid first, and then the coffee powder can be brewed by the cooled liquid. The accumulated carbon dioxide in the coffee powder can block the contact between the water and the coffee powder, so that the carbon dioxide in the coffee powder can be discharged by steaming when the coffee powder is steamed by the heated liquid, so that the contact between the cold water and the coffee powder is more sufficient when the coffee powder is extracted and brewed by the cooled liquid, and the extraction and preparation time of the cold brew coffee can be shortened. In addition, the carbon dioxide in the coffee powder can also bring sour taste to the coffee, so that the coffee powder is soaked by the heated liquid first, and the carbon dioxide is removed by steaming the coffee powder, so that the sour taste of the coffee liquid brewed subsequently can be further reduced, and the flavor of the coffee can be improved.

[0033] The coffee machine provided by the present disclosure can greatly shorten the preparation time of the cold brew coffee, compared with the preparation time of the cold brew coffee prepared by the cold brewing method or the ice drop method in the related art.

[0034] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0036] Figure 1 is a perspective view of the coffee machine provided by an exemplary embodiment of the present disclosure;

[0037] Figure 2 is a perspective view of the coffee machine provided by an exemplary embodiment of the present disclosure, wherein the side plate of the main body is not shown;

[0038] Figure 3 is a perspective view of the coffee machine provided by an exemplary embodiment of the present disclosure (different from Figure 2 view);

[0039] Figure 4This is an assembly diagram of the heat exchange structure, temperature regulating component, heat dissipation structure, and pressure cap of a coffee machine provided in an exemplary embodiment of this disclosure;

[0040] Figure 5 This is an assembly diagram of the heat exchange structure, temperature regulating component, and pressure cap of a coffee machine provided in an exemplary embodiment of this disclosure;

[0041] Figure 6 This is a perspective view of the first heat exchange plate of a coffee machine heat exchange structure provided in an exemplary embodiment of this disclosure;

[0042] Figure 7 This is a perspective view of the second heat exchange plate of a coffee machine heat exchange structure provided in an exemplary embodiment of the present disclosure, wherein a flow channel cover plate, a first connector and a second connector are also shown.

[0043] Figure 8 This is a perspective view of the second heat exchange plate of a coffee machine heat exchange structure provided in an exemplary embodiment of this disclosure;

[0044] Figure 9 This is an assembly diagram of the water injection assembly and mounting bracket of a coffee machine provided in an exemplary embodiment of this disclosure;

[0045] Figure 10 This is an assembly diagram of the water filling assembly and mounting bracket of a coffee machine provided in an exemplary embodiment of this disclosure (with...). Figure 9 (Different perspectives);

[0046] Figure 11 This is a side view schematic diagram of the water injection assembly of a coffee machine provided in an exemplary embodiment of this disclosure;

[0047] Figure 12 This is a perspective structural diagram of the water injection assembly of a coffee machine provided in an exemplary embodiment of this disclosure;

[0048] Figure 13 This is an assembly diagram of the head and neck of a coffee machine provided in an exemplary embodiment of the present disclosure, wherein the brewing head is also shown;

[0049] Figure 14 This is an assembly diagram of the head and brewing head of a coffee machine provided in an exemplary embodiment of the present disclosure, wherein the outer shell of the head is not shown;

[0050] Figure 15 This is a schematic diagram of the assembly of the head and neck of a coffee machine according to an exemplary embodiment of this disclosure (with...). Figure 13 (Different perspectives);

[0051] Figure 16 yes Figure 15 An enlarged schematic diagram of part A in the middle;

[0052] Figure 17 is an assembly view of the head and neck of the coffee machine provided by an exemplary embodiment of the present disclosure, wherein the twist shell of the neck is not shown;

[0053] Figure 18 is Figure 17 is an enlarged view of part B in figure 6;

[0054] Figure 19 is an assembly view of the head and neck of the coffee machine provided by an exemplary embodiment of the present disclosure (different from Figure 15 perspective view);

[0055] Figure 20 is a schematic view of the relative position relationship between the brewing head and the water injection pipe of the coffee machine provided by an exemplary embodiment of the present disclosure.

[0056] BRIEF DESCRIPTION OF DRAWINGS

[0057] 100 - coffee machine; 1 - heat exchange structure; 11 - heat exchange flow channel; 12 - first heat exchange plate; 121 - flow channel cover plate; 13 - second heat exchange plate; 131 - liquid injection groove; 132 - heat exchange fin; 15 - first joint; 16 - second joint; 2 - temperature adjusting member; 21 - semiconductor refrigeration fin; 3 - brewing head; 31 - brewing cavity; 4 - liquid supply pump; 5 - controller; 6 - sensor; 7 - heat dissipation structure; 71 - heat dissipation pipe; 72 - heat conduction plate; 721 - groove; 73 - heat dissipation fin; 74 - fan; 8 - gland; 81 - containing groove; 82 - heat preservation member; 9 - water injection assembly; 91 - driving member; 911 - motor; 92 - water injection pipe; 921 - radial extension section; 9211 - overflow hole; 922 - axial extension section; 9221 - water inlet; 923 - water injection hole; 93 - transmission assembly; 931 - driving gear; 932 - driven gear; 94 - liquid outlet member; 941 - water outlet; 10 - machine body; 101 - machine body main body; 102 - head; 1021 - shell; 1022 - mounting bracket; 1023 - PCB; 1024 - screen; 103 - neck; 1031 - twist shell; 1032 - first transmission gear; 1033 - second transmission gear; 1034 - transmission shaft; 1035 - connecting bracket; 1036 - wire passage; 104 - rotary encoder; 14 - water tank. DETAILED DESCRIPTION

[0058] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0059] In the present disclosure, the orientation words such as "upper" and "lower" are used to refer to the upper and lower positions of the coffee machine 100 in the normal use state, unless otherwise stated. The terms such as "first" and "second" are only used to distinguish one element from another element, and do not have sequentiality and importance. In addition, the above-mentioned orientation words are only used to simplify the description for the convenience of describing the present disclosure, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present disclosure.

[0060] As shown in Figures 1 to 20 The present disclosure provides a coffee machine 100, which comprises a heat exchange structure 1, a temperature adjusting member 2, a brewing head 3, a liquid supply pump 4 and a controller 5. The heat exchange structure 1 is internally formed with a heat exchange flow channel 11 for flowing liquid, the temperature adjusting member 2 is used to heat and cool the liquid in the heat exchange flow channel 11, the brewing head 3 is internally formed with a brewing cavity 31 for accommodating coffee powder, the outlet of the heat exchange flow channel 11 is communicated with the brewing cavity 31, and the liquid supply pump 4 is configured to at least pump the liquid in the heat exchange flow channel 11 into the brewing cavity 31.

[0061] The controller 5 is electrically connected with the temperature adjusting member 2 and the liquid supply pump 4, and the controller 5 is used to control the temperature adjusting member 2 to heat the liquid in the heat exchange flow channel 11, and pump the heated liquid into the brewing cavity 31 through the liquid supply pump 4 to brew and steam the coffee powder in the brewing cavity 31. After the brewing and steaming is completed, the temperature adjusting member 2 is controlled to cool the liquid in the heat exchange flow channel 11, and the cooled liquid is pumped into the brewing cavity 31 through the liquid supply pump 4 to brew the coffee powder in the brewing cavity 31.

[0062] Through the above technical solution, since the temperature adjusting member 2 in the coffee machine 100 provided by the present disclosure can heat and cool the liquid, when making cold-brewed coffee, the coffee powder can be first steamed by the heated liquid, and then brewed by the cooled liquid. Since the accumulated carbon dioxide in the coffee powder will block the full contact between water and coffee powder, when the coffee powder is steamed by the heated liquid, the carbon dioxide in the coffee powder can be discharged by steaming, so that the contact between cold water and coffee powder is more sufficient when the coffee powder is extracted and brewed by the cooled liquid in the subsequent process, and the extraction and making time of cold-brewed coffee can be shortened. In addition, since the carbon dioxide in the coffee powder will also bring sourness to the coffee, the use of the heated liquid to first soak the coffee powder and the steaming of the coffee powder can remove the carbon dioxide, further reduce the sourness of the coffee liquid brewed subsequently, and improve the flavor of the coffee.

[0063] The cold brew coffee is prepared by the coffee machine 100 provided by the present disclosure, and the preparation time of the cold brew coffee is usually 5-8 minutes. Compared with the preparation time of the cold brew coffee prepared by the cold brewing method or the ice drop method in the related art, the coffee machine 100 provided by the present disclosure can greatly shorten the preparation time of the cold brew coffee.

[0064] To further improve the brewing effect and improve the taste of the coffee liquid, the coffee machine 100 can further include a liquid outlet pipeline (not shown) in an optional manner. A first end of the liquid outlet pipeline is in communication with the outlet of the heat exchange flow channel 11, and a second end of the liquid outlet pipeline is in communication with the brewing cavity 31. The liquid supply pump 4 can also pump the liquid in the liquid outlet pipeline from the second end of the liquid outlet pipeline towards the first end of the liquid outlet pipeline. The controller 5 is further configured to control the liquid supply pump 4 to pump the remaining liquid in the liquid outlet pipeline into the heat exchange flow channel 11 after the heated liquid is pumped into the brewing cavity 31 by the liquid supply pump 4.

[0065] That is, the liquid supply pump 4 in the coffee machine 100 provided by the present disclosure can pump the liquid in the liquid outlet pipeline from the first end of the liquid outlet pipeline towards the second end of the liquid outlet pipeline, and can also pump the liquid in the liquid outlet pipeline from the second end of the liquid outlet pipeline towards the first end of the liquid outlet pipeline. After the heated liquid is injected into the brewing cavity 31, there is still heated liquid remaining in the liquid outlet pipeline. Before the cooled liquid is injected into the brewing cavity 31, the controller 5 controls the liquid supply pump 4 to pump the heated liquid remaining in the liquid outlet pipeline back into the heat exchange flow channel 11, and then pump the cooled liquid into the brewing cavity 31 after the cooled liquid is cooled by the temperature adjusting member 2. In this way, the liquid cooled by the temperature adjusting member 2 can be used to extract the coffee powder, and the cooled liquid enters the brewing cavity 31, thereby avoiding the influence of the heated liquid remaining in the liquid outlet pipeline on the temperature of the low-temperature liquid required to enter the brewing cavity 31 subsequently, so as to affect the flavor and taste of the coffee liquid obtained by the final extraction.

[0066] The inlet of the heat exchange flow channel 11 can be connected to a water supply source through a liquid inlet pipeline (not shown). The water supply source can be a water purifier, a faucet, or the like. In an exemplary embodiment provided by the present disclosure, the coffee machine 100 can further include a water tank 14 and a liquid inlet pipeline. A first end of the liquid inlet pipeline is in communication with a water outlet of the water tank 14, and a second end of the liquid inlet pipeline is in communication with the inlet of the heat exchange flow channel 11, so that the liquid to be heated or cooled can enter the heat exchange flow channel 11 from the water tank 14 through the liquid inlet pipeline.

[0067] Since the liquid inlet pipeline, the heat exchange flow channel 11, and the liquid outlet pipeline are in communication with each other, the present disclosure does not limit the position of the liquid supply pump 4. The liquid supply pump 4 can be arranged on the liquid inlet pipeline or the liquid outlet pipeline.

[0068] Optionally, the heating of the liquid in the heat exchange channel 11 by the temperature adjusting member 2 controlled by the controller 5 comprises heating the liquid in the heat exchange channel 11 to 40-60°C. In the present disclosure, the coffee powder is brewed by the liquid at medium temperature, which can release the carbon dioxide accumulated in the coffee powder while preventing the coffee powder from being over-extracted by high-temperature brewing, and reducing the bitterness of the brewed coffee. That is, compared with the case of brewing coffee powder by using hot water (usually 85-95°C) to make hot-extracted coffee (for example, hand-brewed coffee), the present disclosure brews coffee powder by using water at 40-60°C, which can release the carbon dioxide accumulated in the coffee powder on one hand, and improve the effectiveness of subsequent extraction of the coffee powder by cold water on the other hand, and can also avoid the over-extraction of the coffee powder to produce the bitter and rough taste of hot-extracted coffee, and retain the low-acid, low-bitter and smooth taste of cold-extracted coffee.

[0069] Optionally, the cooling of the liquid in the heat exchange channel 11 by the temperature adjusting member 2 controlled by the controller 5 comprises cooling the liquid in the heat exchange channel 11 to 4-10°C to cold-extract the coffee powder by low-temperature cold water.

[0070] In order to brew the coffee powder by low-flow-rate cold water and improve the contact time of the fluid and the coffee powder, the liquid supply pump 4 can be a peristaltic pump. The flow rate of the peristaltic pump can be 0.01-0.6 ml / s. The peristaltic pump can accurately control the flow rate and flow of the liquid, thereby meeting the accurate requirements of the flow rate and flow of the liquid for coffee brewing, and ensuring the stability of the quality of the extracted coffee. In addition, the peristaltic pump can meet the requirement of selectively pumping the liquid in the liquid outlet pipeline from the first end of the liquid outlet pipeline to the second end of the liquid outlet pipeline or from the second end of the liquid outlet pipeline to the first end of the liquid outlet pipeline.

[0071] As a specific embodiment, the weight of the coffee powder in the brewing chamber can be 16g, the controller 5 controls the temperature adjusting member 2 to heat the liquid in the heat exchange channel 11 to 50°C, and the liquid supply pump 4 injects the heated water into the brewing chamber 31 at a water injection flow rate of 0.5 ml / s, the water injection time is 48s, the brewing water weight is 24g, after brewing for 20s, the controller 5 controls the temperature adjusting member 2 to cool the liquid in the heat exchange channel 11 to 5°C, and controls the liquid supply pump 4 to inject the cooled water into the brewing chamber 31 at a water injection flow rate of 0.3 ml / s, the water injection time is 507s, and the water injection weight is 176g. In this way, cold-extracted coffee with TDS (Total dissolved solids) of 1.8%-2.2% can be obtained within 10 minutes.

[0072] In addition, in order to realize the heating and cooling of the liquid, optionally, as shown in FIG. 2, the liquid supply pump 4 can be connected to the heat exchange channel 11 through a liquid supply pipeline 41, and the liquid outlet pipeline 42 can be connected to the heat exchange channel 11 through a liquid outlet pipeline 43. Figure 5As shown, the temperature regulating element 2 can be a thermoelectric cooler 21. The thermoelectric cooler 21 has a first surface and a second surface facing each other. The first surface is in thermal contact with the heat exchange structure 1. The thermoelectric cooler 21 also has a first terminal and a second terminal for connecting to a circuit. The first surface can absorb heat from the liquid in the heat exchange channel 11 when current flows from the first terminal to the second terminal, and can release heat to the liquid in the heat exchange channel 11 when current flows from the second terminal to the first terminal.

[0073] According to the Peltier effect, the state of the first surface is different when the direction of current flow is different. By making the first surface in thermal contact with the heat exchange structure 1, the direction of current flow in the semiconductor cooling chip 21 can be controlled by the controller 5, thereby switching the first surface of the semiconductor cooling chip 21 between the states of heat absorption and heat release to heat or cool the liquid located in the heat exchange channel 11.

[0074] In other embodiments, the temperature regulating element 2 may also include a heating element and a cooling element, which are used to heat or cool the liquid in the heat exchange channel 11, respectively.

[0075] To facilitate heat dissipation from the second surface of the thermoelectric cooler 21 when cooling the liquid in the heat exchange channel 11 on the first surface of the thermoelectric cooler 21, such as... Figure 2 , Figure 3 and Figure 4 As shown, the coffee machine 100 also includes a heat dissipation structure 7, which is in thermal contact with the second surface. By making the second surface of the thermoelectric cooler 21 in thermal contact with the heat dissipation structure 7, heat can be dissipated more quickly when the second surface of the thermoelectric cooler 21 releases heat, thus ensuring the normal operation of the thermoelectric cooler 21.

[0076] As one specific implementation method, such as Figure 2 and Figure 3 As shown, the heat dissipation structure 7 may include a heat-conducting plate 72, a heat dissipation pipe 71, heat dissipation fins 73, and a fan 74. One side of the heat-conducting plate 72 is in thermal contact with the second surface of the thermoelectric cooler 21, and a groove 721 is formed on the side of the heat-conducting plate 72 away from the thermoelectric cooler 21. One end of the heat dissipation pipe 71 is disposed in the groove 721 and in thermal contact with the heat-conducting plate 72, and the other end of the heat dissipation pipe 71 is inserted into the heat dissipation fins 73 and in thermal contact with the heat dissipation fins 73. The heat dissipation fins 73 are disposed below the thermoelectric cooler 21 and the heat exchange structure 74. The fan 74 is arranged side by side with the heat dissipation fins 73 and is used to blow air onto the heat dissipation fins 73 to accelerate the cooling speed of the heat dissipation fins 73, thereby further improving the cooling effect of the heat dissipation structure 7.

[0077] Optionally, such as Figure 4As shown, the heat dissipation pipes 71 are multiple, the grooves 721 on the heat conduction plate 72 are multiple, and the multiple heat dissipation pipes 71 are arranged in correspondence with the multiple grooves 721. The multiple heat dissipation pipes 71 can increase the heat dissipation efficiency and improve the heat dissipation speed of the second surface of the semiconductor refrigeration sheet 21.

[0078] Optionally, the coffee machine 100 can further include a cover 8, and the heat exchange structure 1 and the semiconductor refrigeration sheet 21 are clamped between the cover 8 and the heat dissipation structure 7, and the fastener passes through the cover 8 and the heat dissipation structure 7 to connect the cover 8 and the heat dissipation structure 7. By connecting the cover 8 and the heat dissipation structure 7 through the fastener, the connection mode of clamping the heat exchange structure 1 and the semiconductor refrigeration sheet 21 between the cover 8 and the heat dissipation structure 7 can avoid the contact between the fastener and the semiconductor refrigeration sheet 21, and avoid the heat transfer from the semiconductor refrigeration sheet 21 to the fastener to reduce the heating or cooling efficiency of the semiconductor refrigeration sheet 21 on the liquid in the heat exchange structure 1.

[0079] As a specific embodiment, as shown in Figure 5 As shown, one side of the cover 8 is formed with a containing groove 81, and the semiconductor refrigeration sheet 21 and the heat exchange structure 1 are arranged in the containing groove 81, and the containing groove 81 also has an opening, and the heat conduction plate 72 of the heat dissipation structure 7 covers the opening.

[0080] In addition, the heat exchange structure 1 can have any appropriate structure and shape, for example, the heat exchange structure 1 can be a heat exchange block, and the heat exchange block is provided with a serpentine heat exchange flow channel 11.

[0081] As a specific embodiment, as shown in Figure 6 , Figure 7 and Figure 8 As shown, the heat exchange structure 1 includes a first heat exchange plate 12 and a second heat exchange plate 13, and the first heat exchange plate 12 and the second heat exchange plate 13 are arranged opposite to each other and connected to each other. The first heat exchange plate 12 is provided with a flow channel cover plate 121 on the side close to the second heat exchange plate 13, and the first heat exchange plate 12 is provided with a sensor 6 on the side away from the second heat exchange plate 13, and the sensor 6 is used to detect the temperature of the first heat exchange plate 12 to indirectly obtain the temperature of the liquid in the heat exchange flow channel 11. The second heat exchange plate 13 is formed with a liquid injection groove 131 on the side close to the first heat exchange plate 12, and the liquid injection groove 131 is provided with multiple heat exchange fins 132 arranged at intervals to separate the liquid injection groove 131 into multiple sub-liquid injection grooves, and the multiple heat exchange fins 132 and the flow channel cover plate 121 jointly enclose the heat exchange flow channel 11. The structure of the multiple heat exchange fins 132 arranged at intervals can increase the contact area of the heat exchange structure 1 and the liquid, thereby improving the heat exchange efficiency and enabling the liquid to be heated or cooled more quickly.

[0082] The side of the first heat exchange plate 12 away from the second heat exchange plate 13 is attached to the gland 8, and the side of the second heat exchange plate 13 away from the first heat exchange plate 12 is in heat-conducting contact with the first surface of the semiconductor refrigeration sheet 21. The side of the gland 8 away from the first heat exchange plate 12 is formed with a first joint 15 and a second joint 16, the first joint 15 is in communication with the inlet of the heat exchange flow channel 11, and the second joint 16 is in communication with the outlet of the heat exchange flow channel 11. The first joint 15 is used to connect the liquid inlet pipe, and the second joint 16 is used to connect the liquid outlet pipe.

[0083] Optionally, the accommodation groove 81 is also provided with a heat preservation piece 82, which is arranged between the inner side wall of the accommodation groove 81 and the heat exchange structure 1 and the semiconductor refrigeration sheet 21. By arranging the heat preservation piece 82 on the inner side wall of the accommodation groove 81, the heat exchange between the heat exchange structure 1 and the gland 8 can be reduced, thereby reducing the heat loss when the liquid is heated / cooled.

[0084] Here, it should be noted that the specific material of the heat preservation piece 82 is not limited in the present disclosure, and in an embodiment provided by the present disclosure, the heat preservation piece 82 can be a heat insulation sponge.

[0085] In order to facilitate the injection of liquid into the brewing cavity 31 of the brewing head 3, and to enable the liquid to uniformly infiltrate the coffee powder, as shown in Figures 9 to 12 and Figure 20 The coffee machine 100 further comprises a water injection assembly 9, which comprises a driving piece 91 and a water injection pipe 92, the water injection pipe 92 is located above the brewing cavity 31 and is in communication with the outlet of the heat exchange flow channel 11, and the driving piece 91 is used to drive the water injection pipe 92 to rotate around the central axis of the brewing cavity 31. The water injection pipe 92 comprises a radial extension section 921 extending in the radial direction of the brewing cavity 31, and the radial extension section 921 is formed with a water injection hole 923 for injecting water into the brewing cavity 31. The driving piece 91 drives the water injection pipe 92 to rotate around the central axis of the brewing cavity 31, thereby driving the radial extension section 921 of the water injection pipe 92 to rotate, so that the liquid heated / cooled by the heat exchange structure 1 can be uniformly sprayed onto the coffee powder in the brewing cavity 31 through the water injection hole 923 during the rotation of the radial extension section 921. Due to the rotation of the radial extension section 921, the liquid sprayed out of the water injection hole 923 can cover the entire brewing cavity 31, so that the coffee powder in the brewing cavity 31 can be simultaneously wetted and soaked by the liquid, and the brewing and extraction of the flavor of the coffee are more sufficient.

[0086] As an implementation, the water injection holes 923 are multiple, and the multiple water injection holes 923 are arranged at intervals along the extension direction of the radial extension section 921, and along a direction from an end of the radial extension section 921 close to the central axis of the brewing chamber 31 to an end of the radial extension section 921 away from the central axis of the brewing chamber 31, the diameters of the multiple water injection holes 923 gradually increase. The multiple water injection holes 923 arranged at intervals along the extension direction of the radial extension section 921 can respectively spray liquid at different positions away from the central axis of the brewing chamber 31, thereby improving the uniformity of coverage of the coffee powder, and improving the extraction efficiency and the quality of the extracted coffee liquid.

[0087] In addition, due to the centrifugal force generated during the rotation of the water injection pipe 92, the liquid will move away from the central axis of the brewing chamber 31 under the action of the centrifugal force, and the diameters of the multiple water injection holes 923 gradually increase along the direction away from the central axis of the brewing chamber 31, which can meet the need of more liquid being discharged away from the central axis of the brewing chamber 31, and further improve the efficiency of spraying liquid.

[0088] As another implementation, the water injection holes 923 are arranged at the end of the radial extension section 921 away from the central axis of the brewing chamber 31. Water injection from the end away from the central axis of the brewing chamber 31 can make the water flow fully soak the coffee powder.

[0089] Optionally, as shown in Figure 11 and Figure 12 The water injection pipe 92 further includes an axial extension section 922 connected with the radial extension section 921, the central axis of the axial extension section 922 coincides with the central axis of the brewing chamber 31, and the water injection assembly 9 further includes a transmission assembly 93, and the driving member 91 is in transmission connection with the axial extension section 922 through the transmission assembly 93. An inlet 9221 is formed at an end of the axial extension section 922 away from the radial extension section 921, and the water injection assembly 9 further includes a liquid outlet member 94, and the liquid outlet member 94 is formed with an outlet 941, the outlet of the heat exchange channel 11 is in communication with the outlet 941, the outlet 941 is arranged above the inlet 9221 and spaced apart from the inlet 9221, and the projection of the inlet 9221 along the up-down direction covers the projection of the outlet 941 along the up-down direction. The radial extension section 921 is provided with a water overflow hole 9211 at an end thereof away from the axial extension section 922.

[0090] Since the axial extension 922 of the water injection pipe 92 can rotate around the central axis of the brewing chamber 31 under the driving of the driving member 91, and the outlet of the heat exchange flow channel 11 is connected with the water outlet 941 of the liquid outlet member 94 through a liquid outlet pipeline. Therefore, the water outlet 941 and the water inlet 9221 arranged in a spaced manner can ensure that the water outlet 941 does not rotate with the water inlet 9221 when the water inlet 9221 rotates. At the same time, the projection of the water inlet 9221 in the up-down direction covers the projection of the water outlet 941 in the up-down direction, which can also ensure that the liquid flowing out of the water outlet 941 can drip into the water inlet 9221, thereby ensuring that the water outlet 941 does not affect the delivery of the liquid even if it is arranged in a spaced manner with the water inlet 9221.

[0091] The water overflow hole 9211 arranged on the radial extension 921 can make the liquid entering the water injection pipe 92 be discharged from the water overflow hole 9211 in the case that it is not discharged in time through the water injection hole 923. Thus, it is prevented that the liquid overflows from the water inlet 9221 when the flow of the liquid is large, and the uniformity of the liquid spraying is ensured.

[0092] Optionally, as shown in Figures 9 to 14 , the coffee machine can include a mounting frame 1022 above the brewing head 3, and the driving member 91, the transmission assembly 93, the liquid outlet member 94 and the water injection pipe 92 are mounted on the mounting frame 1022. The driving member 91 can be a motor 911, and the transmission assembly 93 can include a driving gear 931 and a driven gear 932 meshing with each other. The driving gear 931 is in transmission connection with the output end of the motor 911, and the driven gear 932 is sleeved on the axial extension 922 of the water injection pipe 92 to drive the water injection pipe 92 to rotate.

[0093] Optionally, as shown in Figure 1 , Figure 13 and Figure 14 , the coffee machine 100 further includes a machine body 10, and the machine body 10 includes a machine body main body 101, a head 102 protruding from the machine body main body 101, and a neck 103 between the machine body main body 101 and the head 102. The heat exchange structure 1, the temperature adjusting member 2 and the liquid supply pump 4 are all mounted on the machine body main body 101, and the brewing head 3 is connected to the head 102.

[0094] Optionally, as shown in Figure 13 and Figure 14As shown, the head 102 includes a shell 1021 and a mounting frame 1022, the shell 1021 is internally formed with a receiving cavity, the mounting frame 1022, the screen 1024 and the PCB board 1023 are arranged in the receiving cavity, the PCB board 1023 divides the receiving cavity into two cavities, the screen 1024 is arranged in the upper cavity and is electrically connected with the PCB board 1023. The mounting frame 1022 is arranged in the lower cavity, the water injection assembly 9 is mounted on the mounting frame 1022, and the lower cavity can be in communication with the brewing cavity 31 when the brewing head 3 is connected with the shell 1021.

[0095] Optionally, the brewing head 3 is detachably connected with the head 102, for example, is detachably connected with the shell 1021. A first magnet is arranged on the end of the brewing head 3 in contact with the head 102, and a second magnet is correspondingly arranged on the end of the head 102 in contact with the brewing head 3, so that the brewing head 3 and the head 102 are magnetically connected. The magnetically connected brewing head 3 and the head 102 can improve the convenience of the user in mounting and dismounting the brewing head 3, and facilitate the addition of coffee powder before brewing and the pouring of coffee powder after brewing.

[0096] Optionally, the neck 103 can include a knob shell 1021, the knob shell 1021 is rotatably connected between the main body 101 and the head 102, and a rotary encoder 104 is arranged in the interior of the knob shell 1021, the rotary encoder 104 is in transmission connection with the knob shell 1021, and the controller 5 is in electrical connection with the PCB board 1023 and the rotary encoder 104.

[0097] The user can rotate the knob shell 1021, so as to drive the rotation shaft of the rotary encoder 104 to rotate, and the rotating rotary encoder 104 can transmit the operation signal of the user to the PCB board 1023 and the controller 5, so that the user can select the water temperature, water quantity and time and other parameters of the brewed coffee on the display interface of the screen 1024 by rotating the knob. Moreover, the knob is arranged between the head 102 and the main body 101, so that the position of the connection part of the head 102 and the main body 101 can be effectively utilized, and the overall volume of the coffee machine occupied by the knob can be reduced. Moreover, the integrality of the knob and the main body 101 can be improved, and the aesthetic degree of the appearance of the coffee machine 100 can be improved.

[0098] In order to drive the transmission connection between the knob shell 1031 and the rotary encoder 104, as shown, Figures 15 to 18 Optionally, a first transmission gear 1032 is arranged on the inner circumferential surface of the knob shell 1021, a second transmission gear 1033 and a transmission shaft 1034 are further arranged in the interior of the knob shell 1021, the first transmission gear 1032 is in meshing connection with the second transmission gear 1033, and the transmission shaft 1034 connects the second transmission gear 1033 and the rotary encoder 104.

[0099] The neck 103 of the machine body 10 can further include a connecting bracket 1035, two ends of the connecting bracket 1035 extending into the shell 1021 of the head 102 and the machine body 101 respectively, the rotary encoder 104 and the second transmission gear 1033 being arranged on the connecting bracket 1035, and the rotary shell 1031 being sleeved outside the connecting bracket 1035.

[0100] As shown in Figure 16 and Figure 19 The connecting bracket 1035 is formed with a wire passing channel 1036 for passing the liquid outlet pipeline and the control line, the control line being used for connecting the PCB 1023 and / or the controller 5. The second transmission gear 1033 and the rotary encoder 104 are arranged on the upper surface of the connecting bracket 1035, and the wire passing channel 1036 is located below the connecting bracket 1035.

[0101] By simultaneously arranging the rotary encoder 104, the second transmission gear 1033, the liquid outlet pipeline and the control line on the upper and lower sides of the connecting bracket 1035, the space of the machine body 10 of the coffee machine 100 can be fully utilized, the compactness of the structure is improved, and the integration degree among the components of the coffee machine 100 is improved.

[0102] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0103] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the present disclosure.

[0104] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed in the present disclosure.

Claims

1. A coffee maker, characterized in that, The coffee machine comprises: a heat exchange structure, which is internally formed with a heat exchange channel for liquid to flow through; a temperature adjusting member for heating and cooling the liquid in the heat exchange channel; a brewing head, which is internally formed with a brewing cavity for accommodating coffee powder, and the outlet of the heat exchange channel is communicated with the brewing cavity; a liquid supply pump, which is configured to at least pump the liquid in the heat exchange channel into the brewing cavity; a controller, which is electrically connected with the temperature adjusting member and the liquid supply pump; wherein the controller is configured to control the temperature adjusting member to heat the liquid in the heat exchange channel, and pump the heated liquid into the brewing cavity through the liquid supply pump to perform brewing and steaming on the coffee powder in the brewing cavity, and after the brewing and steaming is completed, control the temperature adjusting member to cool the liquid in the heat exchange channel, and pump the cooled liquid into the brewing cavity through the liquid supply pump to perform brewing on the coffee powder in the brewing cavity.

2. Coffee maker according to claim 1, characterized in that The coffee machine further comprises a liquid outlet pipeline, a first end of the liquid outlet pipeline is communicated with the outlet of the heat exchange channel, and a second end of the liquid outlet pipeline is communicated with the brewing cavity; the liquid supply pump is further capable of pumping the liquid in the liquid outlet pipeline from the second end of the liquid outlet pipeline towards the first end of the liquid outlet pipeline; the controller is further configured to, after pumping the heated liquid into the brewing cavity through the liquid supply pump, control the liquid supply pump to pump the remaining liquid in the liquid outlet pipeline into the heat exchange channel.

3. The coffee maker of claim 1, wherein, The heating of the liquid in the heat exchange channel by the temperature adjusting member controlled by the controller comprises: heating the liquid in the heat exchange channel to 40-60℃; The cooling of the liquid in the heat exchange channel by the temperature adjusting member controlled by the controller comprises: cooling the liquid in the heat exchange channel to 4-10℃.

4. The coffee maker of claim 1, wherein, The temperature adjusting member is a semiconductor refrigeration sheet, which has opposite first and second surfaces, the first surface is in thermal contact with the heat exchange structure, and the semiconductor refrigeration sheet further has first and second terminals for connecting with an electric circuit; wherein the first surface is capable of absorbing heat of the liquid in the heat exchange channel when electric current flows from the first terminal to the second terminal, and is capable of releasing heat to the liquid in the heat exchange channel when electric current flows from the second terminal to the first terminal.

5. The coffee maker of claim 4, wherein, The coffee machine further comprises a heat dissipation structure and a gland, the heat dissipation structure is in thermal contact with the second surface, the heat exchange structure and the semiconductor refrigeration sheet are clamped between the gland and the heat dissipation structure, and a fastener passes through the gland and the heat dissipation structure to connect the gland and the heat dissipation structure.

6. Coffee maker according to any one of the claims 1-5, characterized in that The liquid supply pump is a peristaltic pump, and the flow rate of the peristaltic pump is 0.01-0.6ml / s.

7. The coffee maker according to any one of claims 1-5, characterized in that, The coffee machine further comprises a water injection assembly, the water injection assembly comprising a driving member and a water injection pipe, the water injection pipe being located above the brewing chamber and in communication with the outlet of the heat exchange flow channel, the driving member being configured to drive the water injection pipe to rotate around the central axis of the brewing chamber, the water injection pipe comprising a radial extension extending along a radial direction of the brewing chamber, the radial extension being provided with water injection holes for injecting water into the brewing chamber; The water injection holes are arranged in a plurality of groups along the extension direction of the radial extension, and the diameters of the water injection holes gradually increase from the end of the radial extension close to the central axis of the brewing chamber to the end of the radial extension away from the central axis of the brewing chamber; or the water injection holes are arranged at the end of the radial extension away from the central axis of the brewing chamber.

8. The coffee maker of claim 7, wherein, The water injection pipe further comprises an axial extension connected with the radial extension, the central axis of the axial extension coincides with the central axis of the brewing chamber, and the water injection assembly further comprises a transmission assembly, the driving member is in transmission connection with the axial extension through the transmission assembly; The end of the axial extension away from the radial extension is provided with a water inlet, and the water injection assembly further comprises a liquid outlet member, the liquid outlet member is provided with a water outlet, the outlet of the heat exchange flow channel is in communication with the water outlet, the water outlet is located above the water inlet and is arranged in a spaced manner, and the projection of the water inlet along the up-down direction covers the projection of the water outlet along the up-down direction; The radial extension is provided with a water overflow hole at the end thereof away from the axial extension.

9. The coffee maker according to any one of claims 1-5, characterized in that, The coffee machine comprises a machine body, the machine body comprising a machine body main body, a head portion protruding from the machine body main body, and a neck portion between the machine body main body and the head portion; The heat exchange structure, the temperature adjusting member, and the liquid supply pump are all mounted on the machine body main body, and the brewing head is connected to the head portion; The neck portion comprises a knob shell, the knob shell being rotatably connected between the machine body main body and the head portion, the interior of the knob shell being provided with a rotary encoder, the rotary encoder being in transmission connection with the knob shell, and the controller being in electrical connection with the rotary encoder.

10. The coffee maker of claim 9, wherein, The inner circumferential surface of the knob shell is provided with a first transmission gear, the interior of the knob shell is further provided with a second transmission gear and a transmission shaft, the first transmission gear is in meshing connection with the second transmission gear, and the transmission shaft connects the second transmission gear and the rotary encoder.

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