Coffee machine, control method and device of coffee machine and computer equipment

Abstract

The invention relates to the technical field of electrical equipment, and discloses a coffee machine, a control method and device of the coffee machine and computer device.The control method of the coffee machine comprises the steps that the first target conductivity, the second target conductivity and extraction parameters of coffee liquid are determined according to the target grinding degree; controlling the actual conductivity of the coffee mixed stock solution to be equal to the first target conductivity; the coffee mixed stock solution is extracted according to the extraction parameters, and the actual conductivity of the extraction solution is made to be the second target conductivity. According to the control method of the coffee machine, the preparation process of the coffee is controlled according to the first target conductivity, the second target conductivity and the extraction parameters, and therefore intelligent control over the preparation process of the coffee is improved; meanwhile, the second target conductivity can reflect the extraction rate and concentration of the coffee liquid, so that the prepared coffee liquid can reach the optimal coffee quality.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, specifically to a coffee machine, a coffee machine control method, a device, and a computer device. Background Technology

[0002] With the fusion of Chinese and Western cultures, people's love and demand for Western-style small home appliances are increasing, with home coffee machines being a typical example. Coffee not only relieves fatigue, stimulates the stomach and intestines, burns fat and promotes fitness, and inspires creativity, but also has a unique aroma and rich taste, making it popular among young and middle-aged consumers. Freshly ground coffee retains its original aroma and pure taste to the greatest extent, making it the top choice for coffee lovers. This has also led to higher demands for the functionality of home coffee machines.

[0003] Traditional heating methods rely on the operator's technique and skill, resulting in a fixed heating pattern. However, due to individual differences in coffee beans and numerous unpredictable factors during the process, the taste of the brewed coffee fluctuates greatly, leading to a poor drinking experience. Therefore, developing a coffee machine that can intelligently control the coffee's flavor is of great significance. Summary of the Invention

[0004] In view of this, the present invention provides a coffee machine, a method for controlling the coffee machine, a device, and a computer equipment to solve the problems of large fluctuations in the taste of coffee made by coffee machines and poor drinking experience.

[0005] In a first aspect, the present invention provides a control method for a coffee machine, comprising the following steps: obtaining a target grind size for coffee liquid; determining a first target conductivity, a second target conductivity, and extraction parameters for the coffee liquid based on the target grind size; grinding coffee beans; adding water to the inner cavity after grinding the coffee beans for a preset time to obtain a coffee mixture stock solution; obtaining a first actual conductivity of the coffee mixture stock solution; continuing to grind the coffee beans until the actual conductivity of the coffee mixture stock solution reaches the first target conductivity when the first actual conductivity is less than the first target conductivity; extracting the coffee mixture stock solution according to the extraction parameters and obtaining a second actual conductivity of the extracted liquid; determining that the coffee liquid preparation is complete when the second actual conductivity reaches the second target conductivity, thus obtaining coffee liquid.

[0006] The coffee machine control method provided by this invention determines a first target conductivity, a second target conductivity, and extraction parameters for the coffee liquid based on a target grind size. When grinding coffee beans, the actual conductivity of the coffee mixture is controlled to equal the first target conductivity. The coffee mixture is then extracted according to the extraction parameters, ensuring the actual conductivity of the extracted liquid is equal to the second target conductivity. In this coffee machine control method, the coffee preparation process is controlled based on the first target conductivity, the second target conductivity, and the extraction parameters, thereby improving the intelligent control of the coffee preparation process. Furthermore, since the second target conductivity reflects the extraction rate and concentration of the coffee liquid, the prepared coffee liquid achieves optimal coffee quality, thus solving the problems of large fluctuations in coffee taste and poor drinking experience.

[0007] In one optional embodiment, the coffee machine includes an inner cavity and a grinding shaft located in the inner cavity, a first heating plate is disposed at the bottom end of the grinding shaft; a second heating plate is disposed at the bottom end of the inner cavity and is used to form an ohmic heating device with the first heating plate; grinding coffee beans includes: grinding coffee beans using the first heating plate.

[0008] In other words, by using the first heating plate as the coffee bean grinding tool, the grinding and extraction processes can be completed in the same space. This not only saves coffee machine space and grinding time, but also allows for real-time monitoring and control of the coffee extraction state based on changes in conductivity, thereby improving the coffee making and drinking experience.

[0009] In one optional embodiment, after determining that the coffee liquid preparation is complete and the coffee liquid is obtained, the method further includes: controlling the coffee liquid to flow into the coffee container; adding water to the inner cavity and cleaning the inner cavity using the first heating plate; obtaining the third actual conductivity of the inner cavity; when the third actual conductivity is less than the preset third target conductivity, determining that the inner cavity is cleaned and releasing the water in the inner cavity.

[0010] In other words, the cleanliness of the coffee machine's internal cavity is determined by changes in conductivity during the self-cleaning process.

[0011] In one optional embodiment, the water supply system of the coffee machine includes a water tank, a water filtration device, and a pressure assist device, wherein the water filtration device and the pressure assist device are disposed between the water tank and the inner cavity; adding water to the inner cavity includes: opening the pressure assist device to control the water in the water tank to enter the inner cavity through the water filtration device.

[0012] This ensures that the tap water maintains a consistent initial conductivity during grind size identification, extraction, and self-cleaning processes, providing a stable material foundation for coffee extraction.

[0013] In one optional embodiment, determining the first target conductivity, second target conductivity, and extraction parameters of the coffee liquid based on the target grind size includes: obtaining a preset first relationship between conductivity and extraction rate and concentration; determining the target extraction rate and target concentration based on the target grind size; obtaining the second target conductivity based on the target extraction rate, target concentration, and the first relationship; obtaining a preset second relationship between the grind size and the first conductivity; obtaining the first target conductivity based on the target grind size and the second relationship; obtaining a preset third relationship between conductivity and extraction parameters; and obtaining the extraction parameters based on the second target conductivity and the third relationship.

[0014] Therefore, the first target conductivity, the second target conductivity, and the extraction parameters can be conveniently and accurately determined based on the target abrasiveness.

[0015] Secondly, the present invention also provides a control device for a coffee machine, comprising an acquisition module, a control parameter determination module, a grinding module, and an extraction module; the acquisition module is used to acquire the target grind size of the coffee liquid; the control parameter determination module is used to determine a first target conductivity, a second target conductivity, and extraction parameters of the coffee liquid based on the target grind size; the grinding module is used to grind coffee beans; after grinding the coffee beans for a preset time, water is added to the inner cavity to obtain a coffee mixture; the first actual conductivity of the coffee mixture is acquired; when the first actual conductivity is less than the first target conductivity, the coffee beans are ground again until the actual conductivity of the coffee mixture reaches the first target conductivity; the extraction module is used to extract the coffee mixture based on the extraction parameters and acquire the second actual conductivity of the extracted liquid; when the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is determined to be complete, and coffee liquid is obtained.

[0016] Thirdly, the present invention also provides a computer device, including a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the control method of the coffee machine described in the first aspect or any corresponding embodiment.

[0017] Fourthly, the present invention also provides a coffee machine, including an inner cavity, a grinding shaft, a conductivity sensor, a first heating electrode, a second heating electrode, and a computer device according to the third aspect; the grinding shaft is disposed in the inner cavity; the conductivity sensor is disposed in the inner cavity; the first heating electrode is disposed at the bottom end of the grinding shaft; the second heating electrode is disposed at the bottom end of the inner cavity, for forming an ohmic heating device with the first heating electrode; the computer device is communicatively connected to the conductivity sensor, the first heating electrode, and the second heating electrode.

[0018] In one alternative embodiment, the coffee machine further includes a water supply system comprising a water tank, a water filtration device, and a pressure assist device, wherein the water filtration device and the pressure assist device are disposed between the water tank and the inner cavity, and the pressure assist device is communicatively connected to a computer device.

[0019] Fifthly, the present invention also provides a computer-readable storage medium storing computer instructions for causing a computer to perform the control method of the coffee machine according to the first aspect or any corresponding embodiment thereof.

[0020] In a sixth aspect, the present invention also provides a computer program product, including computer instructions for causing a computer to execute the control method of the coffee machine described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a flowchart of a coffee machine control method according to an embodiment of the present invention;

[0023] Figure 2 This is a flowchart of another coffee machine control method according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram illustrating the method for establishing the first relationship between conductivity, extraction rate, and concentration in an embodiment of the present invention.

[0025] Figure 4 This is a flowchart illustrating an example of a coffee machine control method according to an embodiment of the present invention;

[0026] Figure 5 This is a structural block diagram of a coffee machine control device according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of an example coffee machine according to an embodiment of the present invention;

[0029] The components include: 1. Coffee bean storage device; 2. Control panel; 3. Temperature sensor; 4. First heating plate; 5. Second heating plate; 6. Metal filter device; 7. Water inlet; 8. Conductivity sensor; 9. Wastewater outlet; 10. Water filtration device; 11. Water tank; and 12. Pressure assist device. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The aroma and taste of freshly ground coffee are determined by factors such as water temperature, extraction time, coffee bean type, and grind size. Among these, water temperature is the key factor in determining the coffee's taste and flavor. Currently, most coffee machines use instant heating modules, which heat water from room temperature to the extraction temperature, resulting in highly unstable water temperatures and significant fluctuations in taste and flavor. Furthermore, conventional heating methods suffer from uneven temperature distribution, high energy consumption, and long processing times. Ohmic heating, as a promising new heating method, utilizes the dielectric properties of food itself. When an electric current passes through, electrical energy is converted into heat energy within the food, making it popular due to its uniform and rapid heating properties.

[0032] The Gold Cup standard for coffee aims to help coffee brewers achieve optimal coffee quality, with its core focus on controlling extraction rate and concentration. Extraction rate refers to the percentage of soluble substances successfully dissolved in water from coffee grounds; the Gold Cup standard recommends an ideal extraction rate range of 18-22%. Concentration refers to the percentage of total soluble substances dissolved in the coffee liquid; the Gold Cup standard recommends a concentration range of 1.15-1.35%, ensuring a balanced and rich flavor. Electrical conductivity is commonly used to describe the conductivity of a solution or material in a given volume. Soluble substances in coffee, such as acids, sugars, oils, and other compounds, dissolved in water after being extracted by hot water, forming charged ions and increasing the conductivity of the coffee solution. Therefore, coffee conductivity can reflect changes in extraction rate and concentration to some extent.

[0033] Based on this embodiment of the invention, a control method embodiment for a coffee machine is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0034] This embodiment provides a method for controlling a coffee machine, which can be used in computer equipment. Figure 1 This is a flowchart of a coffee machine control method according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps:

[0035] Step S101: Obtain the target grind size of the coffee liquid.

[0036] The target grind size can be input by the user, for example, by entering it on the coffee machine's control panel. Specifically, the target grind size can be coarse, medium, or fine.

[0037] Step S102: Determine the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size.

[0038] The coffee-making process includes a grinding stage and an extraction stage. The first target conductivity is the conductivity required during the grinding stage; the second target conductivity is the conductivity required during the extraction stage. Extraction parameters are the control parameters for the extraction stage, including at least one of the following: extraction temperature, extraction time, and extraction voltage.

[0039] Step S103: Grind the coffee beans. After grinding the coffee beans for a preset time, add water to the inner cavity to obtain the coffee mixture.

[0040] Specifically, a grinding device is installed inside the cavity, which can be used to grind coffee beans.

[0041] Step S104: Obtain the first actual conductivity of the coffee mixture.

[0042] Specifically, a conductivity sensor is installed inside the coffee machine, which can be used to obtain the first actual conductivity of the coffee mixture.

[0043] Step S105: When the first actual conductivity is less than the first target conductivity, continue grinding the coffee beans until the actual conductivity of the coffee mixture reaches the first target conductivity.

[0044] It should be noted that during the coffee bean grinding process, the conductivity sensor monitors the conductivity changes in real time after water is added. Therefore, under normal circumstances, the actual conductivity will not exceed the target conductivity. If the actual conductivity does exceed the target conductivity, grinding can be stopped, and further adjustments can be made by adding water.

[0045] Step S106: Extract the coffee mixture according to the extraction parameters and obtain the second actual conductivity of the extract.

[0046] The extract is the liquid produced during the coffee extraction process; it can also be understood as the original coffee extract that has not reached the ideal extraction quality.

[0047] Similarly, the second actual conductivity of the extract can be obtained through a conductivity sensor.

[0048] Step S107: When the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is completed and the coffee liquid is obtained.

[0049] The coffee machine control method provided in this embodiment determines a first target conductivity, a second target conductivity, and extraction parameters for the coffee liquid based on the target grind size. When grinding coffee beans, the actual conductivity of the coffee mixture is controlled to equal the first target conductivity. The coffee mixture is then extracted according to the extraction parameters, ensuring the actual conductivity of the extracted liquid is equal to the second target conductivity. In this coffee machine control method, the coffee preparation process is controlled based on the first target conductivity, the second target conductivity, and the extraction parameters, thereby improving the intelligent control of the coffee preparation process. Simultaneously, since the second target conductivity reflects the extraction rate and concentration of the coffee liquid, the prepared coffee liquid achieves optimal coffee quality, thus solving the problem of large fluctuations in coffee taste and a poor drinking experience.

[0050] This embodiment provides a control method for a coffee machine, which can be used in computer equipment. The coffee machine includes an inner cavity and a grinding shaft located in the inner cavity. A first heating plate is disposed at the bottom end of the grinding shaft; a second heating plate is disposed at the bottom end of the inner cavity, and is used to form an ohmic heating device with the first heating plate.

[0051] Figure 2 This is a flowchart of another coffee machine control method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0052] Step S201: Obtain the target grind size of the coffee liquid.

[0053] Step S202: Determine the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size.

[0054] In one optional implementation, determining the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size includes the following steps S2021 to S2025.

[0055] Step S2021: Obtain the preset first relationship between conductivity and extraction rate and concentration.

[0056] Figure 3This is a schematic diagram illustrating the method for establishing a first relationship between conductivity, extraction rate, and concentration in an embodiment of the present invention. Depending on the target grind size of the coffee beans, such as... Figure 3 As shown, the target grind size can be coarse, medium, and fine. Experiments were designed for each grind to investigate the effects of control parameters such as electric field strength, temperature, and time on the ideal extraction quality of coffee. Statistical methods were used to establish a linear relationship between coffee conductivity and extraction rate and concentration, thus ensuring that changes in conductivity reflect changes in coffee concentration and extraction rate. The ideal extraction quality, i.e., the extraction rate range, is 18–22%, and the ideal concentration range is 1.15–1.35%. Specifically, these data underwent preliminary cleaning and preprocessing, such as normalization and eigenvalue processing. A model was constructed using the random forest algorithm, and the accuracy of the model was improved through subsequent validation.

[0057] Step S2022: Determine the target extraction rate and target concentration based on the target grinding degree.

[0058] This is because conductivity reflects the extraction rate and concentration, so the target extraction rate and target concentration can be determined based on the target grind size.

[0059] Step S2023: Based on the target extraction rate, target concentration and the first relationship, obtain the second target conductivity.

[0060] Specifically, the second target conductivity can be obtained by using the target extraction rate and target concentration in the first relationship.

[0061] Step S2024: Obtain the second relationship between the preset abrasiveness and the first conductivity; obtain the first target conductivity based on the target abrasiveness and the second relationship.

[0062] Specifically, the grinding degree includes coarse grinding, medium grinding, and fine grinding. In the second relationship, a first conductivity corresponding to each grinding degree can be preset, for example, the first conductivity corresponding to coarse grinding is 100 μs / cm; the first conductivity corresponding to medium grinding is 200 μs / cm; and the first conductivity corresponding to fine grinding is 300 μs / cm.

[0063] Step S2025: Obtain the third relationship between the preset conductivity and extraction parameters; obtain the extraction parameters based on the second target conductivity and the third relationship.

[0064] Specifically, the third relationship between electrical conductivity and extraction parameters can be theoretically based on a large number of preliminary experiments. Using the ideal extraction quality of coffee (i.e., extraction rate range of 18-22% and ideal concentration range of 1.15-1.35%) as the evaluation index, the process parameters for achieving the best extraction quality of coffee with different grind sizes can be explored, thereby constructing the third relationship.

[0065] Step S203: Grind the coffee beans using the first heating plate; after grinding the coffee beans for a preset time, add water to the inner cavity to obtain the coffee mixture.

[0066] In other words, by using the first heating plate as the coffee bean grinding tool, the grinding and extraction processes can be completed in the same space. This not only saves coffee machine space and grinding time, but also allows for real-time monitoring and control of the coffee extraction state based on changes in conductivity, thereby improving the coffee making and drinking experience.

[0067] Step S204: Obtain the first actual conductivity of the coffee mixture.

[0068] Step S205: When the first actual conductivity is less than the first target conductivity, continue to grind the coffee beans using the first heating plate to achieve the first target conductivity with the actual conductivity of the coffee mixture.

[0069] Step S206: Extract the coffee mixture according to the extraction parameters and obtain the second actual conductivity of the extract.

[0070] In this embodiment, the extraction parameters include at least one of the following: extraction temperature, extraction time, and extraction voltage. During the extraction stage, water is ohm-heated using an ohm heating device. Specifically, ohm heating uses the food as a conductor in a circuit; after connecting to a power source, the food acts as a conductor for heating, thereby converting electrical energy into heat energy. This method offers advantages such as uniform heating, rapid heating, high energy utilization, and low cost. Ohm heating can heat water to the ideal extraction temperature more quickly, which helps improve the solubility of aroma, acidity, and flavor compounds in coffee, thus increasing the coffee extraction rate. Simultaneously, uniform heating avoids localized overheating, reducing the over-extraction of bitterness and undesirable substances in the coffee and improving the overall taste.

[0071] Step S207: When the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is determined to be complete, and the coffee liquid is obtained.

[0072] Step S208: Control the flow of coffee liquid into the coffee container.

[0073] Step S209: Add water to the inner cavity and clean the inner cavity using the first heating plate.

[0074] In one optional embodiment, the coffee machine's water supply system includes a water tank, a water filtration device, and a pressure assist device, wherein the water filtration device and the pressure assist device are disposed between the water tank and the inner cavity. Adding water to the inner cavity includes: activating the pressure assist device, controlling the water in the water tank to pass through the water filtration device into the inner cavity. This ensures that the tap water maintains a consistent initial conductivity during grind size identification, extraction, and self-cleaning processes, providing a stable material foundation for coffee extraction.

[0075] Step S210: Obtain the third actual conductivity of the inner cavity.

[0076] Step S211: When the third actual conductivity is less than the preset third target conductivity, it is determined that the inner cavity has been cleaned and the water in the inner cavity is released.

[0077] In other words, the cleanliness of the coffee machine's internal cavity is determined by changes in conductivity during the self-cleaning process.

[0078] Figure 4 This is a flowchart illustrating an example of a coffee machine control method according to an embodiment of the present invention, such as... Figure 4 As shown, the control method for the coffee machine includes the following steps:

[0079] 1. The user selects a fine grind on the coffee machine control panel and starts making coffee with one click. 15g of coffee beans are added to the extraction chamber and the grinding blades start grinding. After grinding for 3 minutes, a small amount of tap water with constant conductivity is added and the grinding status is checked. Grinding ends when the conductivity reaches 300μs / cm.

[0080] 2. Once the coffee grind reaches the preset value, add sufficient tap water to the water supply system, and the ohmic heating electrode plate starts heating. When the coffee liquid temperature rises to 92℃ to 96℃, detect the change in the conductivity of the coffee liquid. Stop heating when the conductivity of the coffee liquid reaches 700μs / cm, and let the coffee liquid flow into the coffee cup after passing through the metal filter device.

[0081] 3. Once brewing is complete, enjoy your coffee. Simultaneously, the user can activate the coffee machine's self-cleaning function with a single button. The water supply system injects tap water with a constant initial conductivity into the cavity, which is then cleaned by the grinding blades. This process is repeated several times, and the change in the cleaning solution's conductivity is monitored. Self-cleaning is considered complete when the cleaning solution's conductivity matches its initial conductivity.

[0082] This embodiment replaces the traditional heating mode in the coffee machine with ohmic heating to improve its heating and extraction efficiency. The ohmic heating electrode plate acts as the coffee bean grinder, combining the grinding and extraction processes into a single space, thus simplifying the coffee-making process. Simultaneously, changes in conductivity can be monitored in real time during extraction, reflecting changes in the extraction rate and concentration. Temperature and voltage control logic is used to regulate the coffee extraction quality, ensuring it remains at an ideal level. Furthermore, the cleanliness of the machine's internal cavity can be determined based on conductivity changes during the self-cleaning process. This invention can apply different temperature and voltage control logics to coffee grind sizes, adaptively maintaining the coffee extraction quality at an ideal level, thereby improving the coffee-drinking experience.

[0083] This embodiment also provides a control device for a coffee machine, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0084] This embodiment provides a control device for a coffee machine, such as... Figure 5 As shown, it includes:

[0085] The acquisition module 501 is used to acquire the target grind size of the coffee liquid.

[0086] The control parameter determination module 502 is used to determine the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size.

[0087] The grinding module 503 is used to grind coffee beans; after grinding the coffee beans for a preset time, water is added to the inner cavity to obtain a coffee mixture; the first actual conductivity of the coffee mixture is obtained; when the first actual conductivity is less than the first target conductivity, the coffee beans are ground again until the actual conductivity of the coffee mixture reaches the first target conductivity.

[0088] The extraction module 504 is used to extract the coffee mixture according to the extraction parameters and obtain the second actual conductivity of the extract; when the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is determined to be complete and the coffee liquid is obtained.

[0089] In one optional embodiment, the coffee machine includes an inner cavity and a grinding shaft located within the inner cavity. A first heating plate is disposed at the bottom end of the grinding shaft; a second heating plate is disposed at the bottom end of the inner cavity, serving to form an ohmic heating device with the first heating plate. The grinding module 503 includes a grinding unit, a water adding unit, and an adjusting unit. The grinding unit grinds coffee beans using the first heating plate. The water adding unit adds water to the inner cavity after grinding the coffee beans for a preset time to obtain a coffee mixture. The adjusting unit obtains a first actual conductivity of the coffee mixture; when the first actual conductivity is less than a first target conductivity, the coffee beans are ground further until the actual conductivity of the coffee mixture reaches the first target conductivity.

[0090] In one optional embodiment, the control device of the coffee machine further includes a cleaning module. After determining that the coffee liquid preparation is complete and the coffee liquid is obtained, the cleaning module is used to control the flow of the coffee liquid into the coffee container; add water to the inner cavity and clean the inner cavity using the first heating plate; obtain the third actual conductivity of the inner cavity; when the third actual conductivity is less than the preset third target conductivity, it is determined that the inner cavity is cleaned and the water in the inner cavity is released.

[0091] In one optional embodiment, the coffee machine's water supply system includes a water tank, a water filtration device, and a pressure assist device, which are disposed between the water tank and the inner cavity. A water filling unit is used to activate the pressure assist device, controlling the flow of water from the water tank through the water filtration device into the inner cavity.

[0092] In one optional implementation, the control parameter determination module 502 is specifically used to obtain a preset first relationship between conductivity and extraction rate and concentration; determine a target extraction rate and target concentration based on the target grinding degree; obtain a second target conductivity based on the target extraction rate, target concentration and the first relationship; obtain a preset second relationship between grinding degree and the first conductivity; obtain the first target conductivity based on the target grinding degree and the second relationship; obtain a preset third relationship between conductivity and extraction parameters; and obtain extraction parameters based on the second target conductivity and the third relationship.

[0093] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0094] In this embodiment, the control device of the coffee machine is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0095] This invention also provides a computer device having the above-described features. Figure 5 The control unit of the coffee machine shown.

[0096] This invention also provides a coffee machine, including an inner cavity, a grinding shaft, a conductivity sensor, a first heating electrode, a second heating electrode, and the aforementioned computer device; the grinding shaft is disposed in the inner cavity; the conductivity sensor is disposed in the inner cavity; the first heating electrode is disposed at the bottom end of the grinding shaft; the second heating electrode is disposed at the bottom end of the inner cavity, and is used to form an ohmic heating device with the first heating electrode; the computer device is communicatively connected to the conductivity sensor, the first heating electrode, and the second heating electrode.

[0097] In one alternative embodiment, the coffee machine further includes a water supply system comprising a water tank, a water filtration device, and a pressure assist device, wherein the water filtration device and the pressure assist device are disposed between the water tank and the inner cavity, and the pressure assist device is communicatively connected to a computer device.

[0098] Figure 7 This is a schematic diagram of the structure of an example coffee machine according to an embodiment of the present invention, as shown below. Figure 7 As shown, the coffee machine includes a coffee bean storage device 1, a control panel 2, a temperature sensor 3, a first heating plate 4, a second heating plate 5, a metal filter device 6, a water inlet 7, a conductivity sensor 8, a wastewater outlet 9, a water filtration device 10, a water tank 11, and a pressure assist device 12.

[0099] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 6 As shown, the computer device includes one or more processors 100, memory 200, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 100 as an example.

[0100] Processor 100 may be a central processing unit, a network processor, or a combination thereof. Processor 100 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0101] The memory 200 stores instructions executable by at least one processor 100 to cause at least one processor 100 to perform the method shown in the above embodiments.

[0102] The memory 200 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 200 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 200 may optionally include memory remotely located relative to the processor 100, which can be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0103] The memory 200 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 200 may also include a combination of the above types of memory.

[0104] The computer device also includes an input device 300 and an output device 400. The processor 100, memory 200, input device 300, and output device 400 can be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0105] Input device 300 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 400 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0106] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0107] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0108] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for a coffee machine, characterized in that, include: To obtain the target grind size of the coffee liquid; The first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid are determined based on the target grind size. The coffee beans are ground; after grinding the coffee beans for a preset time, water is added to the inner cavity to obtain a coffee mixture. Obtain the first actual conductivity of the coffee mixture; When the first actual conductivity is less than the first target conductivity, continue grinding the coffee beans to achieve the first target conductivity with the actual conductivity of the coffee mixture. The coffee mixture is extracted according to the extraction parameters, and the second actual conductivity of the extract is obtained. When the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is determined to be complete, and the coffee liquid is obtained.

2. The method according to claim 1, characterized in that, The coffee machine includes an inner cavity and a grinding shaft located in the inner cavity, with a first heating plate disposed at the bottom end of the grinding shaft; The second heating plate is disposed at the bottom of the inner cavity and is used to form an ohmic heating device with the first heating plate. The grinding of coffee beans includes: The coffee beans are ground using the first heating plate.

3. The method according to claim 2, characterized in that, After determining that the coffee liquid preparation is complete and obtaining the coffee liquid, the process further includes: Control the flow of the coffee liquid into the coffee container; Water is added to the inner cavity, and the inner cavity is cleaned using the first heating plate; Obtain the third actual conductivity of the inner cavity; When the third actual conductivity is less than the preset third target conductivity, it is determined that the inner cavity has been cleaned and the water in the inner cavity is released.

4. The method according to claim 3, characterized in that, The water supply system of the coffee machine includes a water tank, a water filtration device, and a pressure assist device, wherein the water filtration device and the pressure assist device are disposed between the water tank and the inner cavity; adding water to the inner cavity includes: Turn on the pressure assist device to control the water in the water tank to enter the inner cavity through the water filtration and purification device.

5. The method according to claim 1, characterized in that, The process of determining the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size includes: Obtain the preset first relationship between conductivity and extraction rate and concentration; The target extraction rate and target concentration are determined based on the target grindability. The second target conductivity is obtained based on the target extraction rate, the target concentration, and the first relationship; Obtain a second relationship between a preset grinding degree and a first conductivity; The first target conductivity is obtained based on the target abrasiveness and the second relationship; Obtain the third relationship between the preset conductivity and the extraction parameters; The extraction parameters are obtained based on the second target conductivity and the third relationship.

6. A control device for a coffee machine, characterized in that, include: The acquisition module is used to acquire the target grind size of the coffee liquid; The control parameter determination module is used to determine the first target conductivity, the second target conductivity, and the extraction parameters of the coffee liquid based on the target grind size. The grinding module is used to grind coffee beans; after grinding the coffee beans for a preset time, water is added to the inner cavity to obtain a coffee mixture. Obtain the first actual conductivity of the coffee mixture; when the first actual conductivity is less than the first target conductivity, continue grinding the coffee beans until the actual conductivity of the coffee mixture reaches the first target conductivity. An extraction module is used to extract the coffee mixture according to the extraction parameters and obtain the second actual conductivity of the extract. When the second actual conductivity reaches the second target conductivity, the coffee liquid preparation is determined to be complete, and the coffee liquid is obtained.

7. A computer device, characterized in that, include: A memory and a processor are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the control method of the coffee machine according to any one of claims 1 to 5.

8. A coffee machine, characterized in that, include: Inner cavity; A grinding shaft is disposed within the inner cavity; A conductivity sensor is disposed in the inner cavity; The first heating plate is disposed at the bottom end of the grinding shaft; The second heating plate is disposed at the bottom of the inner cavity and is used to form an ohmic heating device with the first heating plate. The computer device of claim 7 is communicatively connected to the conductivity sensor, the first heating electrode, and the second heating electrode.

9. The coffee machine according to claim 8, characterized in that, It also includes a water supply system, which includes a water tank, a water filtration device, and a pressure assist device. The water filtration device and the pressure assist device are located between the water tank and the inner cavity, and the pressure assist device is communicatively connected to the computer equipment.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the control method of the coffee machine according to any one of claims 1 to 5.

11. A computer program product, characterized in that, Includes computer instructions for causing a computer to perform the control method of the coffee machine according to any one of claims 1 to 5.

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