Miniature radial plunger pump control system, detection method and household appliance device

Abstract

According to the miniature radial plunger pump control system, the detection method and the household appliance device, the current acquisition unit detects the working current signal of the miniature radial plunger pump, and the code acquisition unit detects the rotating speed of the motor of the miniature radial plunger pump and outputs the pulse signal; the processing unit obtains the current signal and the pulse signal, calculates the pressure value and the flow value in the miniature radial plunger pump based on the current signal and the pulse signal, and can calculate the flow and the pressure based on the current signal and the pulse signal of the miniature radial plunger pump, so that an additional flow meter and a pressure sensor are omitted, and an external pressure sensor and an external flow meter are not needed. The pressure loss in the fluid transmission process, the interference to the fluid flowing state and the possible pollution to the fluid caused by sensor contact type measurement are avoided, the pipeline joints are reduced, and the equipment size and the leakage risk are reduced.

Description

Technical Field

[0001] This application relates to the field of micro radial piston pump control technology, and in particular to micro radial piston pump control systems, testing methods, and household appliances. Background Technology

[0002] In home appliances such as coffee machines and water dispensers that require precise control of water flow and pressure, the accuracy of fluid pressure and flow control directly affects product performance and user experience. In existing technologies, fluid control systems typically consist of a power unit, a pressure detection unit, a flow detection unit, and a control unit. The power unit is often a common centrifugal pump, gear pump, or diaphragm pump, providing only basic water flow and pressure, with unstable output characteristics. The pressure detection unit relies on an external pressure sensor, and the flow detection unit relies on an external flow meter (such as a Hall effect flow meter or turbine flow meter), both requiring independent installation and wiring. The control unit receives sensor signals and adjusts the operating status of the pump or solenoid valve.

[0003] Current fluid control systems require the installation of multiple external sensors to detect parameters such as flow rate and pressure. Control units need to have multiple interfaces and strong processing capabilities, which increases hardware and software development costs. External sensors occupy valuable internal space, and complex pipeline layouts and joints increase the risk of leakage and hinder the miniaturization of equipment. Summary of the Invention

[0004] The technical problem to be solved by this application is that current fluid control systems require the installation of multiple external sensors to detect parameters such as flow rate and pressure. The control unit needs to have multiple interfaces and strong processing capabilities, which increases the cost of hardware and software development. External sensors occupy valuable internal space of the equipment, and complex pipeline layout and joints increase the risk of leakage and hinder the miniaturization of the equipment.

[0005] In order to solve the above problems, or at least partially solve the above technical problems, this application provides a micro radial piston pump control system, a detection method, and a household appliance.

[0006] In a first aspect, the present invention discloses a micro radial piston pump control system, which includes a processing unit, a current acquisition unit and an encoding acquisition unit. The processing unit is connected to the current acquisition unit and the encoding acquisition unit respectively. The current acquisition unit acquires the current signal of the micro radial piston pump. The encoding acquisition unit detects the rotational speed of the motor inside the micro radial piston pump and outputs a pulse signal. The processing unit acquires the current signal and the pulse signal and calculates the pressure value and flow rate value inside the micro radial piston pump.

[0007] Preferably, it includes a drive unit, which is connected to a processing unit and a current acquisition unit, and drives a miniature radial piston pump.

[0008] Preferably, a grating encoder is installed inside the encoding acquisition unit.

[0009] Secondly, the present invention discloses a micro radial plunger pump household appliance device, including a micro radial plunger pump control system, which includes a micro radial plunger pump. The miniature radial piston pump is connected to the miniature radial piston pump control system. The miniature radial piston pump control system collects real-time current signals and real-time pulse signals from the miniature radial piston pump and calculates the real-time pressure and real-time flow values.

[0010] Preferably, it includes a housing, a miniature radial plunger pump, a heating mechanism, a pressure relief mechanism, a brewing mechanism, a first liquid outlet, and a second liquid outlet; The miniature radial plunger pump is connected to the housing, the heating mechanism and the miniature radial plunger pump control system respectively. The heating mechanism is connected to the pressure relief mechanism. The pressure relief mechanism is connected to the second liquid outlet and the brewing mechanism respectively. The brewing mechanism is connected to the first liquid outlet. A miniature radial piston pump draws liquid from a water tank and transfers it to a heating mechanism. The heating mechanism sets the liquid to a preset temperature, and the brewing mechanism processes the heated liquid for brewing. The brewed liquid flows out through the first liquid outlet, while the heated or unheated liquid is depressurized by a pressure relief mechanism and flows out through the second liquid outlet.

[0011] Thirdly, this invention discloses a method for detecting a miniature radial piston pump, applicable to the aforementioned miniature radial piston pump control system, comprising: The first and second signal parameters of the miniature radial piston pump are obtained, and a preset relationship model is constructed based on the first and second signal parameters to obtain the parameter relationship model. The constructed pre-defined relationship model is displayed in a graphical format; The real-time first signal parameters of the miniature radial piston pump are collected during operation, and the second signal parameters are calculated by inputting them into a preset relational model or preset relational formula to obtain the real-time second signal parameters.

[0012] Preferably, the real-time signal parameters of the miniature radial piston pump are acquired as current signals, specifically including the following steps: When the miniature radial piston pump is in an unloaded state, the current signal corresponding to the fixed pressure value is collected, and a first current-pressure relationship model is constructed based on the fixed pressure value and the current signal. The current signals are sorted according to the timestamp to obtain the first timestamp current signal. A current error elimination model is constructed based on the sliding filter algorithm model. The first timestamp current signal is compared with the corresponding first timestamp input current error elimination model to calculate the error elimination process and obtain the processed current value and the real-time pressure value of the first timestamp. A second current-pressure relationship model is constructed by combining the first timestamp current signal with the real-time pressure value of the first timestamp. The second current-pressure relationship model is then presented in a graphical format. The real-time acquired current signal is input into the second current-pressure relationship model to calculate the real-time pressure value.

[0013] Preferably, the current signals are sorted according to timestamps to obtain the first timestamp current signal. A current error elimination model is constructed based on the sliding filter algorithm model. The first timestamp current signal is compared with the corresponding first timestamp input current error elimination model to calculate the error elimination process, and the processed current value and the real-time pressure value of the first timestamp are obtained. Specifically, the following steps are included: Obtain a current signal from the timing sequence and get the current value at the first timestamp; Obtain a preset number of timestamps preceding the first timestamp in the time sequence to obtain the collected timestamp set; The actual current value is calculated from the current values ​​of all timestamps in the collected timestamp set, and then replaced with the current value of the first timestamp to obtain the processed current value. The processed current value is input into the model to calculate the first pressure value, which is the real-time pressure value at the first timestamp.

[0014] Preferably, the real-time signal parameters of the miniature radial piston pump are acquired as pulse signals, specifically including the following steps: The pulse signal from the encoder is acquired, and the real-time speed of the motor inside the miniature radial piston pump is calculated according to the first preset formula. Obtain the parameters of the miniature radial piston pump, including the number of pistons, cylinder radius, piston working stroke, and reduction ratio. Combine the parameters of the miniature radial piston pump with the actual speed of the motor to calculate the real-time flow rate of the miniature radial piston pump and obtain the real-time flow rate value. Based on pulse signals and flow rates, a mathematical model of pulse signals and flow rates is constructed, and the relationship between pulse signals and flow rates is displayed in a graphical manner. Real-time pulse signals are acquired, and a mathematical model of pulse signals and flow rates is input to obtain real-time flow rates.

[0015] Preferably, the parameters of the miniature radial piston pump are obtained, including the number of pistons, cylinder radius, piston stroke, and reduction ratio. The real-time flow rate of the miniature radial piston pump is calculated by combining these parameters with the actual motor speed, resulting in the real-time flow rate value. This process specifically includes the following steps: Based on the parameters of the miniature radial piston pump and the real-time speed of the motor, the flow rate generated by the polygonal push rod rotating once in the miniature radial piston pump is calculated, and the flow rate of the miniature radial piston pump per revolution is obtained. The real-time flow rate is obtained by combining the reduction ratio of the micro radial piston pump with the single-turn flow rate of the micro radial piston pump according to the second preset formula.

[0016] The technical solution provided in this application has the following advantages compared with the prior art: The miniature radial piston pump control system, detection method, and household appliance provided in this application include a current acquisition unit that detects the operating current signal of the miniature radial piston pump, an encoding acquisition unit that detects the motor speed of the miniature radial piston pump and outputs a pulse signal, and a processing unit that acquires the current signal and pulse signal and calculates the pressure and flow rate values ​​inside the miniature radial piston pump based on the current signal and pulse signal. The flow rate and pressure can be calculated based on the current signal and pulse signal of the miniature radial piston pump, eliminating the need for additional flow meters and pressure sensors. This avoids the pressure loss during fluid transmission caused by sensor contact measurement, interference with the fluid flow state, and potential contamination of the fluid, reduces pipe joints, and lowers equipment size and leakage risk.

[0017] The miniature radial plunger pump home appliance device mentioned includes a miniature radial plunger pump control system and a miniature radial plunger pump. The control system detects the current value and pulse signal of the miniature radial plunger pump to calculate the pressure and flow rate values. This eliminates the need for external pressure sensors and flow meters, avoiding pressure loss during fluid transmission, interference with fluid flow, and potential contamination caused by sensor contact measurements. It also reduces pipe joints, lowers equipment size and leakage risk, adapts to the miniaturization needs of home appliances, saves on sensor procurement, installation, and wiring costs, reduces the complexity of control unit hardware and software development, reduces individual component failure points, reduces sensitivity to water quality, extends equipment lifespan, eliminates the need for separate sensor calibration, simplifies fault diagnosis, and reduces production and after-sales maintenance costs. Furthermore, the innovative use of miniature radial plunger pumps for fluid transport in home appliances, especially in coffee machines, offers significant advantages over traditional electromagnetic pumps.

[0018] The method for testing miniature radial piston pumps mentions acquiring real-time signal parameters of the miniature radial piston pump, such as current value and pulse signal value, inputting them into a pre-constructed preset model or preset formula, calculating variable parameters, such as pressure value and flow rate value, and achieving accurate calibration of pressure and flow rate through the miniature radial piston pump's own operating parameters (current, encoder pulse), without the need for external sensors, enabling the pump body to have self-sensing capabilities, and deriving pressure and flow rate through its own operating parameters.

[0019] Furthermore, the pressure value can be calculated by detecting the current of the miniature radial piston pump, and the flow rate value can be calculated by detecting the encoder pulse signal of the miniature radial piston pump. This eliminates the need for external pressure sensors and flow meters, enabling direct and rapid feedback control of pressure and flow, and reducing signal delay and external interference. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

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

[0022] Figure 1 A circuit diagram of a miniature radial piston pump control system provided in this application; Figure 2 This application provides a structural schematic diagram of a miniature radial piston pump household appliance device; Figure 3 A flowchart of the steps for testing a miniature radial piston pump provided in this application; Figure 4 The specific process of the test method for a miniature radial piston pump provided in this application Figure 1 ; Figure 5 A detailed flowchart of the current error elimination method for a micro radial piston pump detection method provided in this application; Figure 6 A pressure calibration diagram for a micro radial piston pump testing method provided in this application; Figure 7 The specific process of the test method for a miniature radial piston pump provided in this application Figure 2 ; Figure 8 A flow calibration diagram for a micro radial piston pump testing method provided in this application.

[0023] Explanation of reference numerals in the attached figures: 10. Miniature radial plunger pump household appliance; 1. Housing; 2. Miniature radial plunger pump; 3. Heating mechanism; 4. Pressure relief mechanism; 5. Brewing mechanism; 6. First liquid outlet; 7. Second liquid outlet; 100. Miniature radial piston pump control system; 101. Processing unit; 102. Drive unit; 103. Current acquisition unit; 104. Encoding acquisition unit. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Firstly, see Figure 1 This invention discloses a micro radial piston pump control system 100, which is connected to a micro radial piston pump 2 and used to collect the operating parameters of the micro radial piston pump 2 and calculate the variable parameters of the micro radial piston pump 2, such as pressure and flow rate. The system includes a processing unit 101, a current acquisition unit 103, a drive unit 102, and an encoding acquisition unit 104. The processing unit 101 is connected to both the current acquisition unit 103 and the encoding acquisition unit 104. The current acquisition unit 103 collects the current signal of the micro radial piston pump 2, and the encoding acquisition unit 104 detects the rotational speed of the motor inside the micro radial piston pump 2 and outputs a pulse signal. The processing unit 101 acquires the current signal and the pulse signal and calculates the pressure and flow rate values ​​inside the micro radial piston pump 2. The drive unit 102 is connected to the processing unit 101 and the current acquisition unit 103, and drives the micro radial piston pump 2.

[0026] Specifically, the drive unit 102 is used to drive the miniature radial piston pump 2 to operate. The current acquisition unit 103 detects the working current signal of the miniature radial piston pump 2. The encoding acquisition unit 104 detects the speed of the motor of the miniature radial piston pump 2 and outputs a pulse signal. The processing unit 101 acquires the current signal and the pulse signal, and calculates the pressure and flow rate values ​​inside the miniature radial piston pump 2 based on the current signal and the pulse signal. The flow rate and pressure can be calculated based on the current signal and the pulse signal of the miniature radial piston pump 2, eliminating the need for additional flow meters and pressure sensors. It avoids the pressure loss, interference with the fluid flow state, and possible contamination of the fluid caused by sensor contact measurement during fluid transmission. It also reduces pipe joints, equipment size, and leakage risk.

[0027] The processing unit 101 is equipped with a processor such as an MCU to control the various units to perform actions such as starting and stopping. The drive unit 102 is equipped with chips U7 and U8, wherein chips U7 and U8 are of model IR2104STRPBF. The encoding acquisition unit 104 is equipped with a grating encoder.

[0028] Secondly, see Figure 2This invention discloses a miniature radial plunger pump household appliance device 10, comprising a miniature radial plunger pump 2 control system and a miniature radial plunger pump 2. The miniature radial plunger pump 2 and the miniature radial plunger pump 2 control system are connected. The miniature radial plunger pump 2 control system collects real-time current signals and real-time pulse signals from the miniature radial plunger pump 2, and calculates real-time pressure and real-time flow values. The household appliance device can be an espresso machine, Americano machine, capsule coffee machine, tea maker, countertop water dispenser, etc., with the miniature radial plunger pump 2 installed inside. The miniature radial plunger pump 2 draws liquid, mixes it with the extracted or steeped substance inside, and brews it, outputting a brewed product.

[0029] Specifically, in the miniature radial piston pump 2, the control system can drive the miniature radial piston pump 2 and detect its operating parameters, calculating variable parameters such as pressure and flow rate based on these parameters. By detecting the current and pulse signals of the miniature radial piston pump 2, the control system calculates its pressure and flow rate. The system eliminates the need for external pressure sensors and flow meters, avoiding pressure loss during fluid transmission, interference with fluid flow, and potential contamination caused by sensor-based contact measurements. Directly calculating the pressure and flow rate eliminates the need for sensor procurement, installation, and wiring costs, reduces the complexity of control unit hardware and software development, minimizes individual component failure points, reduces sensitivity to water quality, extends equipment lifespan, reduces pipe joints, lowers equipment size and leakage risk, adapts to the miniaturization needs of home appliances, eliminates the need for separate sensor calibration, simplifies fault diagnosis, and reduces production and after-sales maintenance costs. Furthermore, the innovative use of a miniature radial piston pump 2 in home appliances for fluid transport, especially in coffee machines, offers significant advantages over traditional electromagnetic pumps.

[0030] The miniature radial plunger pump appliance 10 includes a housing 1, a miniature radial plunger pump 2, a heating mechanism 3, a pressure relief mechanism 4, a brewing mechanism 5, a first liquid outlet 6, and a second liquid outlet 7. The miniature radial plunger pump 2 is connected to the housing 1, the heating mechanism 3, and the miniature radial plunger pump 2 control system. The heating mechanism 3 is connected to the pressure relief mechanism 4, which is connected to the second liquid outlet 7 and the brewing mechanism 5. The brewing mechanism 5 is connected to the first liquid outlet 6. The miniature radial plunger pump 2 draws liquid from the water tank and transfers it to the heating mechanism 3. After the heating mechanism 3 presets the liquid heating value to a certain temperature, the brewing mechanism 5 processes the heated liquid. The brewed liquid flows out through the first liquid outlet. The heated or unheated liquid is diverted and depressurized through the pressure relief mechanism 4 and flows out through the second liquid outlet 7.

[0031] Specifically, the radial plunger pump quantitatively delivers liquid from the housing 1 to the heating mechanism 3 for heating. The delivered liquid then passes through a miniature radial plunger pump 2. The control system of the miniature radial plunger pump 2 detects its current and motor speed during operation, obtaining current and pulse signals. After the heating mechanism 3 heats the liquid, it passes through the brewing mechanism 5, which contains substances to be extracted or soaked. The substances to be extracted or soaked are mixed with the heated liquid and brewed in the brewing mechanism 5. The brewed liquid flows out through the first liquid outlet. The unused or unheated liquid is diverted and depressurized through the pressure relief mechanism 4 to ensure a stable supply pressure for the radial plunger pump, keeping the miniature radial plunger pump 2 under stable operating conditions. Liquid exceeding the rated operating pressure of the radial plunger pump flows out through the second liquid outlet. When the miniature radial plunger pump 2 is working, the current acquisition unit 103 and the encoding acquisition unit 104 detect the pump's current and pulse signals, which are then calculated and converted into precise pressure and flow values ​​in the processing unit 101.

[0032] Specifically, the brewing mechanism 5 is a container holding the substance to be extracted or steeped. For example, in an espresso machine, the brewing mechanism 5 can be a coffee powder container or portafilter; in an Americano machine, it can be a coffee powder container; in a capsule coffee machine, it can be a coffee capsule; and in a tea maker, it can be a tea filter. Brewing within the brewing mechanism 5 requires a specific pressure, which is detected and controlled by a miniature radial plunger pump 2.

[0033] As one embodiment, the pressure relief mechanism 4 can be a solenoid valve or a pressure relief device.

[0034] Thirdly, see Figures 3-8 This invention discloses a method for detecting a miniature radial piston pump, applicable to a miniature radial piston pump control system, comprising: Step S1: Obtain the first signal parameters and the second signal parameters of the miniature radial piston pump, and construct a preset relationship model based on the first signal parameters and the second signal parameters to obtain the parameter relationship model; Step S2: Display the constructed preset relationship model using a chart format; Step S3: Collect the real-time first signal parameters when the miniature radial piston pump is working, input them into the preset relational model or preset relational formula to calculate the second signal parameters, and obtain the real-time second signal parameters.

[0035] Specifically, in step S1, the first signal parameter and the second signal parameter of the micro radial piston pump are acquired, the relationship between the first signal parameter and the second signal parameter is obtained, a relationship model between the first signal parameter and the second signal parameter is constructed, and the relationship between the first signal parameter and the second signal parameter is quantified through the model. The first signal parameter includes current signal and pulse signal, and the second signal parameter includes pressure value and flow rate value. The acquisition and calculation of the first signal parameter and the second signal parameter are completed quickly by the processor, which is adapted to the millisecond-level control requirements of home appliances, such as rapid response when there is a sudden pressure fluctuation.

[0036] Specifically, in step S2, after constructing a data relationship formula between the first signal parameter and the second signal parameter, the two are correlated and quantified. The quantified data is then displayed in a chart format, making it more convenient for users to view. During the production stage, the chart can be used to quickly determine whether the pump parameters meet the standards, simplifying the calibration process for mass production. The chart can quickly present the data correlation patterns, reducing the understanding cost for R&D, production, and maintenance personnel.

[0037] Specifically, in step S3, when the miniature radial piston pump is working, the first signal parameter is collected in real time and input into the constructed preset relationship model or preset relationship formula to calculate the second signal parameter. This allows the miniature radial piston pump to obtain the second signal parameter without external equipment, saving the cost of sensor procurement, installation, and wiring, and reducing the complexity of control unit hardware and software development.

[0038] The system acquires real-time signal parameters from a miniature radial piston pump, such as current and pulse signal values, and inputs them into a pre-defined model or formula to calculate variable parameters, such as pressure and flow rates. Precise calibration of pressure and flow is achieved using the pump's own operating parameters (current, encoder pulses) without the need for external sensors, enabling the pump to have self-sensing capabilities and derive pressure and flow rates from its own operating parameters. The system converts easily acquired electrical signals (current, pulses) into the core physical quantities (pressure, flow) required for equipment control through a pre-defined model, solving the core problem of being unable to obtain pressure and flow parameters without external sensors.

[0039] Furthermore, the system can calculate the pressure value by detecting the current of the miniature radial piston pump, and it can also calculate the flow rate value by detecting the encoder pulse signal of the miniature radial piston pump. This eliminates the need for external pressure sensors and flow meters, avoiding pressure loss during fluid transmission, interference with fluid flow, and potential contamination caused by sensor contact measurement. It enables direct and rapid feedback control of pressure and flow, reducing signal delay and external interference.

[0040] The real-time signal parameters of the miniature radial piston pump are collected as current signals, specifically including the following steps: Step S1': When the micro radial piston pump is in an unloaded state, the current signal corresponding to the fixed pressure value is collected, and the first current-pressure relationship model is constructed based on the fixed pressure value and the current signal. Step S2': Sort the current signals according to the timestamp to obtain the first timestamp current signal. Construct a current error elimination model based on the sliding filter algorithm model. Calculate the error elimination process by inputting the first timestamp current signal and the corresponding first timestamp current error elimination model to obtain the processed current value and the real-time pressure value of the first timestamp. Step S3': Construct a second current-pressure relationship model by combining the first timestamp current signal with the real-time pressure value of the first timestamp, and then display the second current-pressure relationship model in a graphical manner. Step S4': Input the real-time acquired current signal into the second current-pressure relationship model to calculate the real-time pressure value.

[0041] Specifically, a model is constructed to model the relationship between the current signal and pressure value of a miniature radial piston pump. For example, as the pressure of the miniature radial piston pump changes from 0 to 9 bar, the corresponding current value is collected, and the current changes from 0.338A to 1.956A. A relationship model is constructed between the collected current value and the corresponding pressure value. Then, the real-time current signal is preprocessed to obtain the processed current value, which is input into the model to calculate the real-time pressure value. The calculated real-time pressure value and the real-time current signal are used to construct a second relationship model. Subsequently, when the miniature radial piston pump is working, the real-time current signal is collected and input into the model to calculate the real-time pressure value. This method transforms the easily collected current signal into the core physical quantity required for equipment control through a preset model, solving the core problem of being unable to obtain pressure without external sensors.

[0042] Step S2' specifically includes the following steps: Step S21': Obtain a current signal from the timing current signal to get the current value at the first timestamp; Step S22': Obtain a preset number of timestamps preceding the first timestamp in the time sequence to obtain the collected timestamp set; Step S23': Calculate the actual current value from the current values ​​at all timestamps in the collected timestamp set, and replace the current value at the first timestamp to obtain the processed current value; Step S24': Input the processed current value into the model to calculate the first pressure value. The first pressure value is the real-time pressure value at the first timestamp.

[0043] Specifically, a self-calibrated multi-fold sliding filter algorithm is used to filter the current signal. The current signal at a specific timestamp is filtered to obtain a processed current signal. The pressure value of the corresponding processed current signal is then calculated in the first relational model. This pressure value is the pressure value of the current signal at that timestamp. This algorithm is used to eliminate errors, ensuring the accuracy of the measured real-time pressure value. In this embodiment, taking a 5-fold sliding filter as an example, the sum of the currents from time N-4 to time N is calculated, the calibration current is subtracted, and then multiplied by one-fifth of the stage coefficient to obtain the real-time current signal. This signal is then input into the relational model to obtain the actual pressure value in the water circuit at time n. Using this algorithm, current errors can be effectively eliminated, improving the accuracy and sensitivity of the radial plunger pump's current detection. The current calculation formula is as follows: ,in, For the calibration current, I is the current value. However, the factor used for sliding filtering can be set based on actual needs, and is not limited to the 5 times set in this embodiment.

[0044] The real-time signal parameters of the miniature radial piston pump are acquired as pulse signals, specifically including the following steps: Step S1”: Acquire the pulse signal from the encoder and calculate the real-time speed of the motor inside the miniature radial piston pump according to the first preset formula; Step S2”: Obtain the parameters of the miniature radial piston pump, including the number of pistons, cylinder radius, piston working stroke, and reduction ratio. Combine the parameters of the miniature radial piston pump with the actual speed of the motor to calculate the real-time flow rate of the miniature radial piston pump and obtain the real-time flow rate value. Step S3”: Based on the pulse signal and flow rate value, construct a mathematical model of the pulse signal and flow rate value, and display the relationship between the pulse signal and flow rate value in a graphical manner; Step S4”: Collect real-time pulse signals, input the pulse signals and flow rate mathematical model to obtain real-time flow rate values.

[0045] Specifically, the encoder detects the rotational speed of the miniature radial piston pump and generates pulse signals. The PPR value (Pulses Per Revolution) corresponding to the encoder is input into the first preset formula. By inputting the collected pulse signals, the rotational speed of the miniature radial piston pump is calculated. Combining the parameters of the miniature radial piston pump itself, the flow rate generated by one revolution of the polygonal push rod of the miniature radial piston pump is calculated. Based on the single-revolution flow rate value, the rotational speed ratio of the miniature radial piston pump, and the pulse signal, the total flow rate value is calculated. A data relationship model is constructed between the pulse signal and the calculated total flow rate value. Subsequently, real-time pulse signals are collected and input into the model to calculate the real-time total flow rate value. By calculating the real-time flow rate value using the pulse signal converted from the rotational speed of the miniature radial piston pump's own motor, the need for a built-in flow rate sensor can be avoided.

[0046] Step S2 specifically includes the following steps: Step S21”: Based on the parameters of the miniature radial piston pump and the real-time speed of the motor, calculate the flow rate generated by the polygonal push rod rotating once in the miniature radial piston pump, and obtain the flow rate of the miniature radial piston pump in one revolution. Step S22”: Combine the reduction ratio of the micro radial piston pump with the single-turn flow rate of the micro radial piston pump to calculate the real-time flow rate according to the second preset formula.

[0047] Specifically, since radial piston pumps are primarily used in the household appliance industry, the working liquid is mostly water. Water only begins to show a significant increase in density and compressibility at 1 GPa (10000 bar), a pressure far exceeding the operating pressure range of radial piston pumps. Therefore, when calculating the flow rate of a radial piston pump, the liquid characteristics are considered as incompressible fluid. Furthermore, based on the piston structure of the radial piston pump, the incompressible fluid will be completely discharged from the chamber during each piston stroke. Thus, the flow rate when the polygonal push rod rotates once in the radial piston pump can be obtained. The formula is as follows: , among which, among which Let N be the flow rate when the polygonal push rod rotates one revolution, R be the number of plungers in the radial plunger pump, R be the cylinder radius of the radial plunger pump, and L be the working stroke of the plunger (twice the eccentricity E); calculate the total flow rate of the radial plunger pump. The formula is as follows:

[0048] Where i is the reduction ratio of the micro radial piston pump, and n is the motor speed calculated by inputting a pulse signal into the first preset formula.

[0049] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0055] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0056] The above description describes specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A micro radial piston pump control system, characterized in that, It includes a processing unit, a current acquisition unit, and an encoding acquisition unit. The processing unit is connected to the current acquisition unit and the encoding acquisition unit respectively. The current acquisition unit acquires the current signal of the miniature radial piston pump, and the encoding acquisition unit detects the speed of the motor inside the miniature radial piston pump and outputs a pulse signal. The processing unit acquires the current signal and the pulse signal and calculates the pressure value and flow rate value inside the miniature radial piston pump.

2. The system according to claim 1, characterized in that, It includes a drive unit, which is connected to the processing unit and the current acquisition unit. The drive unit drives a miniature radial piston pump.

3. The system according to claim 1, characterized in that, A grating encoder is installed inside the encoding and acquisition unit.

4. A miniature radial piston pump household appliance, comprising the miniature radial piston pump control system as described in any one of claims 1-3, characterized in that, Including miniature radial piston pumps; The miniature radial piston pump is connected to the miniature radial piston pump control system. The miniature radial piston pump control system collects real-time current signals and real-time pulse signals from the miniature radial piston pump and calculates the real-time pressure and real-time flow values.

5. The apparatus according to claim 4, characterized in that, It includes a housing, a miniature radial piston pump, a heating mechanism, a pressure relief mechanism, a brewing mechanism, a first liquid outlet, and a second liquid outlet; The miniature radial plunger pump is connected to the housing, the heating mechanism and the miniature radial plunger pump control system respectively. The heating mechanism is connected to the pressure relief mechanism. The pressure relief mechanism is connected to the second liquid outlet and the brewing mechanism respectively. The brewing mechanism is connected to the first liquid outlet. A miniature radial piston pump draws liquid from a water tank and transfers it to a heating mechanism. The heating mechanism sets the liquid to a preset temperature, and the brewing mechanism processes the heated liquid for brewing. The brewed liquid flows out through the first liquid outlet, while the heated or unheated liquid is depressurized by a pressure relief mechanism and flows out through the second liquid outlet.

6. A method for detecting a miniature radial piston pump, applicable to the miniature radial piston pump control system described in any one of claims 1-3, characterized in that, include: The first and second signal parameters of the miniature radial piston pump are obtained, and a preset relationship model is constructed based on the first and second signal parameters to obtain the parameter relationship model. The constructed pre-defined relationship model is displayed in a graphical format; The real-time first signal parameters of the miniature radial piston pump are collected during operation, and the second signal parameters are calculated by inputting them into a preset relational model or preset relational formula to obtain the real-time second signal parameters.

7. The method according to claim 6, characterized in that, The real-time signal parameters of the miniature radial piston pump are collected as current signals, specifically including the following steps: When the miniature radial piston pump is in an unloaded state, the current signal corresponding to the fixed pressure value is collected, and a first current-pressure relationship model is constructed based on the fixed pressure value and the current signal. The current signals are sorted according to the timestamp to obtain the first timestamp current signal. A current error elimination model is constructed based on the sliding filter algorithm model. The first timestamp current signal is compared with the corresponding first timestamp input current error elimination model to calculate the error elimination process and obtain the processed current value and the real-time pressure value of the first timestamp. A second current-pressure relationship model is constructed by combining the first timestamp current signal with the real-time pressure value of the first timestamp. The second current-pressure relationship model is then presented in a graphical format. The real-time acquired current signal is input into the second current-pressure relationship model to calculate the real-time pressure value.

8. The method according to claim 7, characterized in that, The current signals are sorted according to timestamps to obtain the first timestamp current signal. A current error elimination model is constructed based on the sliding filter algorithm model. The first timestamp current signal is compared with the corresponding first timestamp input current error elimination model to calculate the error elimination process, and the processed current value and the real-time pressure value of the first timestamp are obtained. The specific steps include: Obtain a current signal from the timing sequence and get the current value at the first timestamp; Obtain a preset number of timestamps preceding the first timestamp in the time sequence to obtain the collected timestamp set; The actual current value is calculated from the current values ​​of all timestamps in the collected timestamp set, and then replaced with the current value of the first timestamp to obtain the processed current value. The processed current value is input into the model to calculate the first pressure value, which is the real-time pressure value at the first timestamp.

9. The method according to claim 6, characterized in that, The real-time signal parameters of the miniature radial piston pump are acquired as pulse signals, specifically including the following steps: The pulse signal from the encoder is acquired, and the real-time speed of the motor inside the miniature radial piston pump is calculated according to the first preset formula. Obtain the parameters of the miniature radial piston pump, including the number of pistons, cylinder radius, piston working stroke, and reduction ratio. Combine the parameters of the miniature radial piston pump with the actual speed of the motor to calculate the real-time flow rate of the miniature radial piston pump and obtain the real-time flow rate value. Based on pulse signals and flow rates, a mathematical model of pulse signals and flow rates is constructed, and the relationship between pulse signals and flow rates is displayed in a graphical manner. Real-time pulse signals are collected, and a mathematical model of pulse signals and flow rates is input to obtain real-time flow rates.

10. The method according to claim 9, characterized in that, Obtain the parameters of the miniature radial piston pump, including the number of pistons, cylinder radius, piston stroke, and reduction ratio. Combine these parameters with the actual motor speed to calculate the real-time flow rate of the miniature radial piston pump, obtaining the real-time flow value. The specific steps include: Based on the parameters of the miniature radial piston pump and the real-time speed of the motor, the flow rate generated by the polygonal push rod rotating once in the miniature radial piston pump is calculated, and the flow rate of the miniature radial piston pump per revolution is obtained. The real-time flow rate is obtained by combining the reduction ratio of the micro radial piston pump with the single-turn flow rate of the micro radial piston pump according to the second preset formula.

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