Temperature-controllable coffee machine

Abstract

The utility model relates to a temperature-controllable coffee machine which comprises a coffee machine body, a brewing head, a water tank, a circulating pipeline, a water pump, a temperature detecting piece, a heating piece, a control assembly, an electromagnetic valve assembly and a pressurizing assembly. A flow channel is arranged in the brewing head, opening and closing are controlled through a brewing head pull rod, the circulation pipeline is connected with the water tank and the brewing head and comprises a water inlet pipeline and a water return pipeline, water flow circulation is promoted through the water pump, the temperature detection piece is used for monitoring water temperature, the heating piece is used for heating water flow, and the control assembly is used for receiving signals of the heating piece and the temperature detection piece. The electromagnetic valve assembly can control the water return pipeline and the water pump to operate, and the pressurizing assembly increases the brewing pressure. A user can effectively control the brewing water temperature through the control assembly, and other assemblies are assisted for brewing, so that the coffee brewing quality is improved.

Description

Technical Field

[0001] This utility model relates to a temperature-controlled coffee machine, specifically a coffee machine that uses control components to adjust and stabilize water temperature in order to improve the quality of coffee extraction. Background Technology

[0002] In modern society, it's common to see people carrying a cup of coffee on the street. As one of the most popular beverages today, coffee not only effectively refreshes the mind, but recent scientific studies have also shown that moderate coffee consumption can significantly reduce the risk of certain diseases, especially cardiovascular diseases. With the increasing demand for coffee, the coffee market is booming. According to a global coffee market report, the market size will reach $170.8 billion by 2030, demonstrating the immense value behind the coffee market.

[0003] To enjoy a delicious cup of coffee, the most important step is brewing. As times have changed and consumers have evolved to pursue different coffee beans, various brewing methods have emerged to create a more aromatic and flavorful coffee. Among these, semi-automatic or fully automatic machines and manual coffee machines are the most common. In today's fast-paced society, the main reason why manual coffee machines still hold a place is that the coffee they brew is different from that brewed by machines, which are limited by the machine's operating process. The coffee brewed by manual machines has a more unique character. For some baristas or coffee lovers, the flexibility of manual brewing, which allows for adjustments according to personal preferences, is even more appealing.

[0004] Currently, most manual coffee machines use a boiler heating system to provide hot water, which is then pushed to the brew head by water pressure. Although this system is simple in structure and low in cost, it still has a major problem: extremely poor temperature control. The water temperature fluctuates greatly, especially after multiple brews, and becomes very unstable, affecting the quality of the extracted coffee. Furthermore, when the user pulls the lever to brew, the water temperature does not immediately reflect the output of the heating element; there is a certain time delay. Even worse, when the heating element reaches a certain temperature, the water temperature may begin to drop, causing a temperature drop that prevents the brew head from maintaining a constant water temperature within the ideal range, thus affecting the stability of the brewed coffee. Although some manufacturers have reduced the problem of temperature drop during steaming and brewing by using dual boiler systems or heat exchangers to improve temperature control, they still cannot flexibly adjust according to environmental conditions or brewing needs. In other words, high-precision temperature control technology has not yet been solved.

[0005] Therefore, providing a coffee machine with a high-precision temperature control system that keeps hot water within the ideal temperature range and can adjust parameters according to user needs to produce more aromatic coffee is a key area of ​​current development. Utility Model Content

[0006] The main objective of this invention is to enable users to easily maintain the water temperature of the coffee machine within a set range, and to adjust the water temperature according to different needs, ensuring consistent coffee quality. This avoids the problems of existing coffee machines with large water temperature fluctuations and limited temperature control, which prevent the water temperature from consistently remaining within the optimal range and resulting in unsuitable coffee flavor. To achieve the above objective and improve upon existing shortcomings, this invention provides a temperature-controlled coffee machine comprising: a coffee machine body; a brewing head connected to the coffee machine body, the brewing head having a flow channel; a brewing head lever connected to the brewing head and driven by an external force to control the opening and closing of the flow channel; a water tank installed inside the coffee machine body; and a circulation pipe connected to the brewing head. The flow channel is connected to the interior of the water tank. The circulation pipeline includes an inlet pipe and a return pipe. The inlet pipe guides water to the brewing head and, after the brewing operation is completed, guides water back to the water tank through the return pipe. A water pump is located in the circulation pipeline. A temperature sensor is located in the circulation pipeline and close to the brewing head. A heating element is located in the circulation pipeline on the pipe leading to the brewing head. A control component is connected to the coffee machine body and electrically connected to the heating element and the temperature sensor. A solenoid valve assembly is located in the coffee machine body. The solenoid valve assembly is electrically connected to the control component and controlled by the brewing head lever to open and close the return pipe and control the operation and shutdown of the water pump. A pressurization component is located inside the coffee machine body and is connected to the circulation pipeline.

[0007] In some embodiments, the control assembly further includes a console and a controller. The console is disposed on the outer surface of the coffee machine body, and the controller is disposed inside the coffee machine body. The controller is electrically connected to the console, the heating element, the water pump, the temperature sensor, and the solenoid valve assembly.

[0008] In some embodiments, the console further has a plurality of buttons, each button controlling the opening and closing of the coffee machine body, the mode switching of the coffee machine body, the opening or closing of the water pump, and the heating temperature range of the heating element.

[0009] In some embodiments, the control component further includes a PID controller electrically connected to the heating element and the temperature sensing element.

[0010] In some embodiments, the outer surface of the coffee machine body further has a display element, which is electrically connected to the controller.

[0011] In some embodiments, the brewing head lever is driven by an external force to move from its initial position to a first state and a second state. When the brewing head lever is in the first state, the upper half of the flow channel is open and the lower half is closed. When the brewing head lever is in the second state, the upper half of the flow channel is closed and the lower half is open.

[0012] In some embodiments, the pressurizing assembly further includes a piston chamber, a transmission assembly, a pull rod, and a first one-way valve. The piston chamber is connected to the circulation pipeline. The side of the piston chamber away from the side connected to the circulation pipeline has a rack on its outer surface. The transmission assembly meshes with the rack. The pull rod is connected to the transmission assembly and is driven to pivot by an external force. The first one-way valve is located in the water inlet pipeline and between the piston chamber and the heating element.

[0013] In some embodiments, the transmission assembly further includes a first gear and a second gear, the second gear meshing with the rack and the first gear respectively, the pull rod being connected to the first gear, and the pitch circle diameter of the first gear being smaller than the pitch circle diameter of the second gear.

[0014] In some embodiments, the coffee machine body further includes a wastewater tray located below the brewing head.

[0015] In some embodiments, an air pump, a pipe fitting, and a second one-way valve are provided. The air pump is located within the coffee machine body and electrically connected to the control component. The second one-way valve is located on the pipe fitting, one end of which is connected to the air pump, and the other end of which is connected to the water inlet pipe. According to the technology defined above, after the coffee machine body is turned on, the user can set the temperature according to their needs or different coffee varieties through the control component to achieve active temperature control. The temperature of the circulation pipe is monitored in real time by the signal returned by the temperature sensor to ensure that the water temperature during brewing is maintained within the ideal range. Once the water temperature is confirmed to be within acceptable limits, the user only needs to operate the brewing head lever and the pressurizing component to complete the coffee brewing operation at the most suitable temperature. Attached Figure Description

[0016] Figure 1This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 This is a front view of the present invention.

[0018] Figure 3 for Figure 1 Cross-sectional view.

[0019] Figure 4 for Figure 1 Cross-sectional view.

[0020] Figure 5 This is a schematic diagram illustrating the preheating process of the brewing head of this utility model.

[0021] Figure 6 This is a schematic diagram illustrating the pre-soaking process of this utility model.

[0022] Figure 7 This is a schematic diagram of the brewing process using a pressurization component according to this utility model.

[0023] Figure 8 This is a schematic diagram illustrating the depressurization process after brewing according to this utility model.

[0024] Figure 9 This is a schematic diagram illustrating the cleaning process of the air pump of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] Coffee machine body: 1;

[0027] Water tank: 11;

[0028] Display components: 12;

[0029] Wastewater tray: 13;

[0030] 2 brewing heads;

[0031] Flow channel: 21;

[0032] Brewing head lever: 22;

[0033] Circulation piping: 3;

[0034] Water inlet pipe: 31;

[0035] Return water pipe: 32;

[0036] Water pump: 33;

[0037] Temperature detection element: 34;

[0038] Heating element: 35;

[0039] Control components: 4;

[0040] Console: 41;

[0041] Button: 411;

[0042] Controller: 42;

[0043] PID controller: 43;

[0044] Solenoid valve assembly: 5;

[0045] Pressurization components: 6;

[0046] Piston cavity: 61;

[0047] Rack: 611;

[0048] Transmission components: 62;

[0049] First gear: 621;

[0050] Second gear: 622;

[0051] Pull rod: 63;

[0052] First check valve: 64;

[0053] Air pump: 71;

[0054] Pipe fittings: 72;

[0055] Second check valve: 73. Detailed Implementation

[0056] To clearly illustrate the aforementioned objectives and effects achieved by this utility model, its features and effects are described in detail below with reference to the accompanying drawings. Please refer to the drawings. Figures 1 to 9As shown, this utility model discloses a temperature-controlled coffee machine, comprising: a coffee machine body 1; a brewing head 2 connected to the coffee machine body 1, the brewing head 2 having a flow channel 21 inside; a brewing head lever 22 connected to the brewing head 2 and driven by an external force to control the opening and closing of the flow channel 21; a water tank 11 installed inside the coffee machine body 1; a circulation pipe 3 connected to the flow channel 21 and the interior of the water tank 11, the circulation pipe 3 including an inlet pipe 31 and a return pipe 32, the inlet pipe 31 guiding water flow to the brewing head 2, and after the brewing operation is completed, guiding water flow back to the water tank 11 through the return pipe 32; and a water pump 33. The following components are provided: a circulation pipe 33; a temperature sensor 34, located in the circulation pipe 3 and close to the brewing head 2; a heating element 35, located in the circulation pipe 3 on the pipe flowing to the brewing head 2; a control component 4, connected to the coffee machine body 1 and electrically connected to the heating element 35 and the temperature sensor 34; a solenoid valve assembly 5, located inside the coffee machine body 1, electrically connected to the control component 4 and controlled by the brewing head lever 22 to open and close the return water pipe 32 and control the operation and shutdown of the water pump 33; and a pressurizing component 6, located inside the coffee machine body 1 and connected to the circulation pipe 3. The accompanying drawings used in this document are for illustrative purposes only and are not intended to limit the scope of this invention.

[0057] When a user wants to brew coffee, they simply turn on the coffee machine 1 via control component 4 and set the desired temperature according to personal needs or different coffee varieties. This activates the heating element 35. At this time, the water pump 33 operates with the coffee machine 1, causing water to flow sequentially from the inlet pipe 31 through the heating element 35 and the pressurizing component 6 before entering the brewing head 2 and the flow channel 21. Under the operation of the heating element 35, the water temperature rises to the user-set temperature, allowing the brewing head 2 to preheat. The temperature sensor 34 continuously monitors the temperature to ensure it remains constant within the ideal range. After the brewing head 2 has preheated, the user simply operates the brewing head lever 22 to close the return water pipe 32 using the solenoid valve assembly 5. With the assistance of the pressurizing component 6, the coffee brewing process is completed within the ideal temperature range. Figures 1 to 9 As shown.

[0058] Furthermore, to facilitate user settings, the control component 4 further includes a control console 41, a controller 42, and a PID controller 43. The control console 41 is located on the outer surface of the coffee machine body 1, and the controller 42 is located inside the coffee machine body 1. The controller 42 is electrically connected to the control console 41, the heating element 35, the temperature sensor 34, and the solenoid valve assembly 5. The PID controller 43 is electrically connected to the heating element 35 and the temperature sensor 34. Simultaneously, the PID controller 43 is also electrically connected to the controller 42 and the control console 41. The control console 41 has multiple buttons 411, which the user can operate to transmit signals to the controller 42, thereby driving the coffee machine body 1 to open and close, controlling the water pump 33 to open and close, and controlling the solenoid valve assembly 5 to open or close the return water pipe. The heating temperature range of the heating element 35 can also be set according to personal needs or to suit different types of coffee via operation button 411. At this time, the signal is transmitted to the PID controller 43, which drives the heating element 35 to start operating. The temperature sensor 34 continuously transmits temperature signals back to the PID controller 43 to monitor the temperature and prevent temperature fluctuations that could lead to insufficient flavor in the brewed coffee. Upon receiving the signal, the PID controller 43 adjusts the output power of the heating element 35 or stops its output as needed to prevent overheating. After the heating element 35 stops operating, the water temperature may drop slightly. When the PID controller 43 receives a signal indicating a temperature drop, it will then drive the heating element 35 to operate at different power levels to maintain a constant water temperature within the ideal brewing temperature range. Figures 5 to 8 As shown.

[0059] Continuing from the previous explanation, to prevent users from setting an incorrect temperature range and causing the heating element 35 to malfunction without their knowledge, the outer surface of the coffee machine body 1 further includes a display 12. This display 12 is electrically connected to the controller 42. When the PID controller 43 receives a signal from the temperature sensor 34, it adjusts the output power as needed and then feeds the signal back to the controller 42. The controller 42 then transmits the signal to the display 12, allowing the user to clearly view their set temperature range and current water temperature. This not only ensures the user's settings are correct but also allows them to check for problems with the PID controller 43, the heating element 35, and the temperature sensor 34. If, after running the machine for a period of time, the real-time water temperature displayed on the 12 differs from the set water temperature, it indicates potential component damage or malfunction, requiring replacement of the parts. Figure 2 and Figures 5 to 8 As shown.

[0060] Furthermore, to facilitate brewing operations, the brewing head lever 22 is driven by external force to move from its initial position to a first state and a second state. When the brewing head lever 22 is in the first state, the upper half of the flow channel 21 is open and the lower half is closed. When the brewing head lever 22 is in the second state, the upper half of the flow channel 21 is closed and the lower half is open. When the user pulls the brewing head lever 22 to the first state, the heated water is actuated by the water pump 33 and enters the flow channel 21 through the water inlet pipe 31. At the same time, the brewing head lever 22 transmits a signal to the internal micro switch, which transmits a signal to the controller 42 and drives the solenoid valve assembly 5 to close the return water pipe 32. At this time, the water can only flow to the first state. After the water pump 33 delivers water to a certain pressure, it automatically stops operating. The user can then manually drive the pressurization component 6 to easily complete the coffee brewing process. After brewing, the user pulls the brewing head lever 22 to the second position, allowing the remaining water in the brewing head 2 to drain from the lower half of the flow channel 21, thus releasing the pressure. Simultaneously, the upper half of the flow channel 21 is closed, the microswitch stops transmitting signals, and the controller 42 drives the solenoid valve assembly 5 to open the return water pipe 32. The water will then flow again in the circulation pipe 3 driven by the water pump 33 and heated by the heating element 35, thereby ensuring that the brewing head 2 maintains a constant temperature within a suitable range for brewing. Figures 5 to 8 As shown, after depressurization, the user can pull the brewing head lever 22 back to the initial position. At this time, the upper and lower parts of the flow channel 21 are closed. After the water continues to be heated by the heating element 35, it enters the brewing head 2 and the flow channel 21 through the water inlet pipe 31, and then returns from the brewing head 2 to the water tank through the return water pipe 32, so that the brewing head 2 maintains a certain temperature.

[0061] Continuing from the previous description, to prevent water from backflowing into the heating element 35 and causing the coffee machine body 1 to malfunction during pressurization, the pressurization assembly 6 further includes a piston chamber 61, a transmission assembly 62, a pull rod 63, and a first one-way valve 64. The piston chamber 61 is connected to the circulation pipe 3. The side of the piston chamber 61 away from the side connected to the circulation pipe 3 has a rack 611 on its outer surface. The transmission assembly 62 meshes with the rack 611. The pull rod 63 is connected to the transmission assembly 62 and is driven to move by external force. The first one-way valve 64 is located in the water inlet pipe 31, between the piston chamber 61 and the heating element 35. The first one-way valve 64 prevents water backflow that could damage the heating element 35 when the user pulls the lever 63 to apply pressure. After pressurization extraction, when the user moves the brewing head lever 22 to the second position, water flows into the piston chamber 61 and drives the transmission assembly 62 via the rack 611, thereby resetting the lever 63. The user can also manually pull the lever 63 to reset it for the next pressurization extraction. Figure 3 and Figure 7 As shown.

[0062] Continuing from the previous explanation, to make the pressure extraction process easier for the user, the transmission assembly 62 further includes a first gear 621 and a second gear 622. The second gear 622 meshes with both the rack 611 and the first gear 621. The pull rod 63 is connected to the first gear 621, and the pitch circle diameter of the first gear 621 is smaller than that of the second gear 622. This arrangement of the first gear 621 and the second gear 622 allows the user to pull the pull rod 63 without applying excessive force. In other words, it requires relatively little strength from the user, allowing even users with less strength to easily complete the pressure extraction process. Figure 3 and Figure 7 As shown.

[0063] Furthermore, to prevent water remaining in the lower half of the flow channel 21 from spilling onto the table or coffee machine body 1 when the pressure is released after the brew head lever 22 switches to the second state, requiring the user to spend extra time cleaning, the coffee machine body 1 further includes a wastewater tray 13. This wastewater tray 13 is located below the brew head 2. When the user releases pressure on the brew head 2, residual water is drained into the wastewater tray 13. The wastewater tray 13 is detachably installed on the coffee machine body 1 for easy cleaning by the user. Figure 1 and Figure 8 As shown.

[0064] Additionally, to prevent residual moisture or dry powder in the brewing head 2, an air pump 71, a pipe 72, and a second one-way valve 73 are provided. The air pump 71 is located inside the coffee machine body 1 and electrically connected to the control component 4. The second one-way valve 73 is located on the pipe 72, one end of which is connected to the air pump 71, and the other end is connected to the water inlet pipe 31. After the user pulls the brewing head lever 22 to the second position to release pressure, they can directly pull the brewing head lever 22 back to the first position and switch the operating mode of the coffee machine body 1 via the control panel 41 to drive the air pump 71 to operate slowly and supply air to dry residual moisture and some dry powder. The second one-way valve 73 prevents water from directly entering the air pump 71 and damaging it when the user pulls the lever 63 to pressurize. Figure 9 As shown.

Claims

1. A temperature-controlled coffee machine, characterized in that, Include: One coffee machine body; A brewing head is connected to the coffee machine body, and the brewing head has a flow channel inside; A brewing head lever is connected to the brewing head and is driven by an external force to control the opening and closing of the flow channel; A water tank, wherein the water tank is installed inside the coffee machine body; A circulation pipeline is provided, which is connected to the flow channel and the interior of the water tank. The circulation pipeline includes an inlet pipeline and a return pipeline. The inlet pipeline guides water to the cooking head, and after the cooking operation is completed, the return pipeline guides water back to the water tank. A water pump, wherein the water pump is installed in the circulation pipeline; A temperature detection element is disposed in the circulation pipeline and close to the brewing head; A heating element is disposed in the circulation pipeline and flows to the brewing head; A control component, the control component being connected to the coffee machine body and electrically connected to the heating element and the temperature detection element; A solenoid valve assembly is disposed within the coffee machine body. The solenoid valve assembly is electrically connected to the control assembly and is controlled by the brewing head lever to open and close the return water pipe and control the operation and shutdown of the water pump. A pressurizing component is disposed inside the coffee machine body and connected to the circulation pipeline.

2. The temperature-controlled coffee machine as described in claim 1, characterized in that, The control component further includes a console and a controller. The console is located on the outer surface of the coffee machine body, and the controller is located inside the coffee machine body. The controller is electrically connected to the console, the heating element, the water pump, the temperature detection element, and the solenoid valve assembly.

3. The temperature-controlled coffee machine as described in claim 2, characterized in that, The control panel further has a plurality of buttons, each button controlling the opening and closing of the coffee machine body, the mode switching of the coffee machine body, the opening or closing of the water pump, and the heating temperature range of the heating element.

4. The temperature-controlled coffee machine as described in claim 1, characterized in that, The control component further includes a PID controller, which is electrically connected to the heating element and the temperature sensing element.

5. The temperature-controlled coffee machine as described in claim 2, characterized in that, The outer surface of the coffee machine body further has a display element, which is electrically connected to the controller.

6. The temperature-controlled coffee machine as described in claim 1, characterized in that, The brewing head lever is driven by an external force to move from its initial position to a first state and a second state. When the brewing head lever is in the first state, the upper half of the flow channel is open and the lower half is closed. When the brewing head lever is in the second state, the upper half of the flow channel is closed and the lower half is open.

7. The temperature-controlled coffee machine as described in claim 1, characterized in that, The pressurizing assembly further includes a piston chamber, a transmission assembly, a pull rod, and a first one-way valve. The piston chamber is connected to the circulation pipeline. The side of the piston chamber away from the side connected to the circulation pipeline has a rack on its outer surface. The transmission assembly meshes with the rack. The pull rod is connected to the transmission assembly and is driven to pivot by an external force. The first one-way valve is located in the water inlet pipeline and between the piston chamber and the heating element.

8. The temperature-controlled coffee machine as described in claim 7, characterized in that, The transmission assembly further includes a first gear and a second gear, the second gear meshing with the rack and the first gear respectively, the pull rod being connected to the first gear, and the pitch circle diameter of the first gear being smaller than that of the second gear.

9. The temperature-controlled coffee machine as described in claim 1, characterized in that, The coffee machine body further includes a wastewater tray, which is located below the brewing head.

10. The temperature-controlled coffee machine as described in claim 1, characterized in that, The system also includes an air pump, a pipe fitting, and a second one-way valve. The air pump is located inside the coffee machine body and is electrically connected to the control component. The second one-way valve is located on the pipe fitting. One end of the pipe fitting is connected to the air pump, and the other end of the pipe fitting is connected to the water inlet pipe.

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