Flow calibration method of fluid equipment and fluid equipment

Abstract

The invention relates to the technical field of drinking water equipment, particularly provides a flow calibration method of fluid equipment and the fluid equipment, and aims to solve the problem that the flow measurement precision is reduced. Therefore, the fluid equipment comprises at least one fluid pipeline, a flow meter and a flow control component are arranged on the fluid pipeline, and the flow calibration method comprises the steps that after the operation of the fluid equipment reaches a preset condition, the flow control component is controlled to operate in a preset mode, so that fluid is discharged from the fluid pipeline; obtaining the actual volume V1 of the fluid in the discharge process of the fluid; the actual volume V2 measured by the flow meter in the discharging process of the fluid is obtained; calculating a calibration coefficient k of the flowmeter based on the actual volume V1 and the actual volume V2; and calibrating the subsequent measured value F of the flow meter based on the calibration coefficient k. The follow-up measurement value of the flowmeter is corrected according to the actual volume and the measured volume of the flowmeter, so that the measurement result is more accurate, and the flow measurement accuracy of the fluid equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of drinking water equipment technology, specifically providing a flow calibration method for fluid equipment and a fluid equipment. Background Technology

[0002] As a common drinking water device, the integrated water purifier and heater can provide boiling water, room temperature water, and warm water at any set temperature to meet diverse user needs. Currently, the mainstream solution for achieving precise temperature control is to use dual-pipeline mixing and regulation technology: flow sensors are installed in both the cold and hot water pipes. The main control unit calculates the target flow rates of the cold and hot water based on the target temperature and total flow rate using thermodynamic formulas. By adjusting the proportional valves or water pumps in the pipes, the measured flow rates are brought close to the target value, thus mixing the water to the desired temperature.

[0003] However, this solution has significant limitations. Flow sensors have a specific measurement range, and their accuracy is unevenly distributed within that range, typically reaching its highest accuracy between 20% and 80% of the range. When the flow rate approaches the lower limit of the range, the sensor signal is weak, resulting in a low signal-to-noise ratio; approaching the upper limit, nonlinear response or measurement lag may occur. These factors can lead to inaccurate actual mixing ratios of hot and cold water, causing deviations between the outlet water temperature and the set value. Furthermore, the measurement accuracy of the flow sensor slowly drifts with usage time and water quality conditions (such as scale buildup). This performance degradation further deteriorates the accuracy and consistency of the mixed water temperature control after long-term use, failing to meet the high temperature accuracy requirements of applications such as formula preparation, significantly impacting the user experience and becoming a critical technical bottleneck that urgently needs to be addressed. Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the flow measurement accuracy of existing flow meters decreases due to drift or error caused by long-term use.

[0005] In a first aspect, the present invention provides a flow calibration method for a fluid device, the fluid device including at least one fluid pipeline, wherein a flow meter and a flow control component are disposed on the fluid pipeline, and the flow calibration method includes: When the fluid equipment reaches the preset operating conditions, the flow control component is controlled to operate in the preset mode so that the fluid is discharged from the fluid pipeline; Obtain the actual volume V1 of the fluid during the discharge process; The actual volume V2 measured by the flow meter during the discharge process of the fluid is obtained; Based on the actual volume V1 and the actual volume V2, calculate the calibration coefficient k of the flow meter; The subsequent measurement value F of the flow meter is calibrated based on the calibration coefficient k.

[0006] In a preferred embodiment of the flow calibration method for the aforementioned fluid device, the fluid device further includes a water storage tank, the fluid pipeline is connected to the water storage tank, and water in the water storage tank can be discharged through the fluid pipeline. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: Obtain the initial liquid level H1 of the water storage tank before drainage and the final liquid level H2 after drainage; The actual volume V1 is calculated based on the cross-sectional area S of the water storage tank and the change in the liquid level of the water storage tank. The change in liquid level is the difference between the initial liquid level H1 and the final liquid level H2.

[0007] In the preferred embodiment of the flow calibration method for the aforementioned fluid equipment, the step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: Control the flow control component to operate in the preset mode for a first preset time; The fluid discharged within the first preset time period is received by an external measuring device, and its volume is measured as the actual volume V1; or The fluid device has a built-in water receiver. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: Control the flow control component to operate in the preset mode for a first preset time; The volume of fluid received by the water receiver within the first preset time period is measured as the actual volume V1.

[0008] In the preferred embodiment of the flow calibration method for the aforementioned fluid equipment, the step of "calculating the calibration coefficient k of the flow meter based on V1 and V2" specifically includes: k = k0 × (V1 / V2); Wherein, k0 is the original coefficient of the flow meter.

[0009] In the preferred embodiment of the flow calibration method for the aforementioned fluid equipment, the step of "calibrating the subsequent measurement value F of the flow meter based on the calibration coefficient k" specifically includes: F = k × F0; Wherein, F0 is the original measured value of the flow meter.

[0010] In a preferred embodiment of the flow calibration method for the aforementioned fluid equipment, the fluid pipeline includes a cold water pipeline and a hot water pipeline, both of which are equipped with the flow meter and the flow control component. The control method includes flow calibration on the cold water pipeline and flow calibration on the hot water pipeline. The flow calibration method further includes: When calibrating the flow rate on the cold water line, shut off the hot water line; and / or When calibrating the flow rate on the hot water line, shut off the cold water line.

[0011] In a preferred embodiment of the flow calibration method for the aforementioned fluid equipment, the fluid equipment further includes a mixing chamber, and the outlet ends of both the cold water pipe and the hot water pipe are connected to the mixing chamber. The flow calibration method further includes: Obtain the user-defined target temperature T and target total flow rate Q; Based on the target temperature T and the target total flow rate Q, determine the required target flow rate Qh for hot water and the target flow rate Qc for cold water; The flow control components on the hot water pipeline and the cold water pipeline are controlled to stabilize the measured value F of the calibrated flow meter on the hot water pipeline at the target hot water flow rate Qh, and to stabilize the measured value F of the calibrated flow meter on the cold water pipeline at the target cold water flow rate Qc.

[0012] In the preferred embodiment of the flow calibration method for the above-mentioned fluid equipment, the preset condition is that the cumulative operating time of the fluid equipment reaches a second preset time, or The preset condition is that the cumulative water output of the fluid device reaches a preset water volume.

[0013] In the preferred embodiment of the flow calibration method for the above-mentioned fluid equipment, the flow control component is a solenoid valve or a water pump.

[0014] In a second aspect, the present invention also provides a fluid device including a controller configured to perform the flow calibration method described in any of the preceding claims.

[0015] Those skilled in the art will understand that the technical solution of the present invention provides a flow calibration method for a fluid device. The fluid device includes at least one fluid pipeline, on which a flow meter and a flow control component are installed. The flow calibration method includes: when the fluid device operates under preset conditions, controlling the flow control component to operate in a preset mode to discharge fluid from the fluid pipeline; obtaining the actual volume V1 of the fluid during the discharge process; obtaining the actual volume V2 measured by the flow meter during the discharge process; calculating the calibration coefficient k of the flow meter based on the actual volume V1 and the actual volume V2; and calibrating the subsequent measurement value F of the flow meter based on the calibration coefficient k. By adopting the above technical solution, the present invention can effectively solve the problem of decreased flow measurement accuracy caused by drift or error in the flow meter due to long-term use. Specifically, based on the difference between the actual volume and the volume measured by the flow meter, the calibration coefficient is accurately calculated to correct the subsequent measurement value of the flow meter, thereby making the measurement result closer to the true value and improving the accuracy of the overall flow measurement of the fluid device.

[0016] Furthermore, the fluid device of the present invention also includes a water storage tank, and a fluid pipeline is connected to the water storage tank, allowing water in the water storage tank to be discharged through the fluid pipeline. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: obtaining the initial liquid level H1 of the water storage tank before discharge and the final liquid level H2 after discharge; calculating the actual volume V1 based on the cross-sectional area S of the water storage tank and the change in liquid level; wherein the change in liquid level is the difference between the initial liquid level H1 and the final liquid level H2. This method provides reliable basic data for calculating the actual volume V1.

[0017] Furthermore, the step of "obtaining the actual volume V1 of the fluid during the discharge process" in this invention specifically includes: controlling the flow control component to operate in a preset mode for a first preset time; receiving the discharged fluid within the first preset time through an external measuring device, and measuring its volume as the actual volume V1. This method provides high measurement accuracy and more reliable data on the actual volume V1.

[0018] Furthermore, the fluid device of the present invention has a built-in water receiver. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: controlling the flow control component to operate in a preset mode for a first preset time; and measuring the volume of fluid received by the water receiver within the first preset time as the actual volume V1. This method not only improves the integration and reliability of the entire measurement system, but also saves space occupied by external measuring devices, making the overall structure of the fluid device more compact. Attached Figure Description

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic flowchart of the flow calibration method for the fluid equipment of the present invention; Figure 2 This is a schematic flowchart of an embodiment of the flow calibration method for fluid equipment of the present invention; Figure 3 This is a schematic flowchart of a second embodiment of the flow calibration method for fluid equipment of the present invention; Figure 4 This is a schematic flowchart of Embodiment 3 of the flow calibration method for fluid equipment of the present invention; Figure 5 This is a schematic flowchart of Embodiment 4 of the flow calibration method for fluid equipment of the present invention. Detailed Implementation

[0020] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with an integrated heat exchanger, the flow calibration method for fluid equipment provided by the present invention is equally applicable to other products that need to address the problem of decreased flow measurement accuracy due to drift or error in flow meters caused by long-term use.

[0021] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] As mentioned in the background art, flow meters experience drift or errors over long-term use, leading to a decrease in flow measurement accuracy. This invention provides a flow calibration method for fluid equipment. The method aims to effectively solve the problem of decreased flow measurement accuracy caused by drift or errors in flow meters due to long-term use by calibrating the flow meter during the fluid discharge process based on the actual volume of the fluid and the actual volume measured by the flow meter.

[0023] like Figure 1 As shown, the present invention provides a flow calibration method for a fluid device. The fluid device includes at least one fluid pipeline, on which a flow meter and a flow control component are installed. The flow calibration method includes: When the fluid equipment reaches the preset conditions, the flow control component operates in the preset mode to discharge the fluid from the fluid pipeline; Obtain the actual volume V1 of the fluid during the discharge process; Obtain the actual volume V2 measured by the flow meter during the fluid discharge process; Calculate the calibration coefficient k of the flow meter based on the actual volume V1 and the actual volume V2; The flowmeter's subsequent measurement value F is calibrated based on the calibration coefficient k.

[0024] The fluid device of the present invention includes at least one fluid pipeline, and each fluid pipeline is provided with a flow meter and a flow control component. The function of the flow meter is to measure the flow rate of the fluid passing through the fluid pipeline; the flow control component can control the flow of the fluid in the pipeline, such as adjusting the flow rate and controlling the flow on and off of the fluid.

[0025] The flow calibration method for fluid equipment provided by this invention allows fluid to be discharged from the fluid pipeline only after the fluid equipment has reached preset operating conditions, thereby ensuring the stability of the calibration environment and the reliability of the data.

[0026] Preferably, in the first embodiment, the aforementioned preset condition is that the cumulative operating time of the fluid device reaches a second preset time.

[0027] In the overall process of flow calibration, preset conditions are a crucial prerequisite for triggering subsequent calibration operations. Setting the preset condition as the cumulative operating time of the fluid equipment reaching a second preset time means that its operating time will be continuously recorded from the moment the fluid equipment is put into operation. When this cumulative operating time reaches the pre-set second preset time value, the calibration condition is determined to be met, and the subsequent flow calibration steps are initiated.

[0028] It should be noted that the second preset time is a specific time length determined comprehensively based on factors such as the characteristics of the fluid equipment, the usage scenario, and the performance of the flow meter. Different fluid equipment, due to differences in their internal structure, working principle, and the properties of the fluids they process, will exhibit varying rates of flow meter drift or error. This invention does not impose a specific limit on the value of the second preset time. By reasonably setting the second preset time, calibration can be performed in time before a significant decrease in flow meter measurement accuracy occurs, ensuring the accuracy of the measurement results.

[0029] Preferably, in the second embodiment, the preset condition is that the cumulative water output of the fluid device reaches a preset water volume.

[0030] Setting the preset condition to the cumulative water output of the fluid equipment reaching a preset water volume means that the total amount of fluid discharged from the fluid equipment will be continuously measured from the start of operation. When this cumulative water output value reaches the preset water volume value, the calibration condition is determined to be met, and the subsequent flow calibration steps will be initiated.

[0031] It should be noted that the preset water volume in this invention is not arbitrarily set, but rather requires comprehensive consideration of multiple factors. On one hand, the performance characteristics of the flow meter in the fluid equipment must be considered; different types of flow meters exhibit different patterns of measurement accuracy variation with usage. On the other hand, the application scenario and actual needs of the fluid equipment must be taken into account. Therefore, this invention does not impose a specific limit on the exact value of the preset water volume. By setting an appropriate preset water volume, calibration can be performed in time before the flow meter's measurement error reaches a level that affects the normal operation of the equipment, ensuring the accuracy of flow measurement.

[0032] Once the preset conditions are met, the flow control component operates according to the preset mode. The preset mode is a pre-set operating method designed to allow fluid to be discharged from the fluid pipeline.

[0033] It should be noted that the preset modes may differ depending on the fluid equipment and application scenario. For example, the flow control component may be used to discharge fluid at a constant rate, or to discharge fluid according to a specific flow rate curve. This creates a controllable fluid discharge environment for subsequent flow calibration.

[0034] Preferably, the flow control component is a solenoid valve or a water pump.

[0035] During the fluid discharge process, it is necessary to obtain the actual fluid volume V1 and the actual volume V2 measured by the flow meter during the fluid discharge process. When the flow meter is working normally, it will output relevant data on the fluid volume flowing through the pipeline in real time. By reading the measurement value of the flow meter during this fluid discharge process, V2 can be obtained.

[0036] Based on the actual volume V1 and the actual volume V2, the calibration coefficient k of the flow meter is obtained through a specific calculation method. This coefficient can reflect the degree of deviation between the flow meter's measured value and the actual value.

[0037] Preferably, the step of "calculating the calibration coefficient k of the flow meter based on V1 and V2" specifically includes: k = k0 × (V1 / V2); where k0 is the original coefficient of the flow meter.

[0038] It should be noted that the initial coefficient k0 is a fixed parameter obtained during the initial calibration of the flow meter at the factory. It reflects the measurement characteristics of the flow meter under specific standard conditions. The initial coefficient k0 can be obtained from the flow meter's product manual, factory calibration report, or the equipment's historical records.

[0039] Finally, the subsequent measurement value F of the flow meter is calibrated according to the calibration coefficient k, so that the measurement result of the flow meter is closer to the actual value and the measurement accuracy is improved.

[0040] Preferably, the step of "calibrating the subsequent measurement value F of the flow meter based on the calibration coefficient k" specifically includes: F = k × F0; where F0 is the original measured value of the flow meter.

[0041] By periodically performing the above-mentioned calibration method, this invention can accurately calculate the calibration coefficient based on the difference between the actual volume and the volume measured by the flow meter, and correct the subsequent measurement values ​​of the flow meter, thereby making the measurement results closer to the true value and improving the accuracy of flow measurement in the entire fluid equipment.

[0042] Furthermore, the flow calibration method provided by this invention has strong adaptability and can be applied to various types of fluid equipment, as long as the equipment has fluid pipelines, flow meters, and flow control components. Regardless of whether the fluid is liquid or gas, and regardless of the type of flow meter (such as turbine flow meters, electromagnetic flow meters, mass flow meters, etc.), the method of this invention can be used for calibration. This makes the method have broad application prospects, enabling it to play a role in multiple industries and fields, providing a reliable calibration solution for fluid flow measurement in different scenarios.

[0043] Preferably, such as Figure 2 As shown, in the first embodiment, the fluid device further includes a water storage tank, and a fluid pipeline is connected to the water storage tank. Water in the water storage tank can be discharged through the fluid pipeline. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: Obtain the initial liquid level H1 of the water storage tank before drainage and the final liquid level H2 after drainage; The actual volume V1 is calculated based on the cross-sectional area S of the water storage tank and the change in the liquid level in the tank. The change in liquid level is the difference between the initial liquid level H1 and the final liquid level H2.

[0044] Before the fluid discharge process begins, the initial liquid level H1 of the storage tank needs to be obtained. For example, this can be accurately measured using devices such as level sensors, float-type level sensors, and ultrasonic level sensors. The level sensor can sense the height of the liquid level in the storage tank in real time and transmit the data to the control system. After the fluid discharge process is completed, the final liquid level H2 of the storage tank is obtained again.

[0045] For example, the liquid level change in this invention is obtained by subtracting the initial liquid level H1 from the final liquid level H2, that is, the liquid level change ΔH = H1 − H2.

[0046] The actual volume V1 is calculated using the volume calculation formula V1=S×ΔH, based on the cross-sectional area S of the water storage tank and the calculated liquid level change ΔH.

[0047] Therefore, this invention obtains the liquid level change by directly measuring the initial liquid level H1 and the final liquid level H2 of the water storage tank. This method avoids the accumulation of errors that may result from indirect measurement. Liquid level sensors and other measuring devices typically have high accuracy and can accurately sense changes in liquid level, thus providing reliable basic data for calculating the actual volume V1.

[0048] The volume is calculated by multiplying the cross-sectional area of ​​the water tank by the change in liquid level. This method is simple in principle and stable in its calculation process. As long as the water tank has a regular shape and the cross-sectional area S is a fixed value, the calculated actual volume V1 can accurately reflect the true volume of fluid discharged. Compared to some other complex volume measurement methods, this method reduces errors caused by too many measurement steps.

[0049] Preferably, such as Figure 3 As shown, in the second embodiment, the step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: The flow control component is controlled to operate in a preset mode for a first preset time; The fluid discharged within a first preset time is received by an external measuring device, and its volume is measured as the actual volume V1.

[0050] By using an external measuring device to measure the actual volume V1, errors that may exist in the internal flow measurement system of the fluid equipment can be avoided. Flow meters inside fluid equipment may become inaccurate due to prolonged use, wear, or the influence of impurities in the fluid. External measuring devices, on the other hand, are typically rigorously calibrated and verified, offering higher measurement accuracy and providing more reliable actual volume data.

[0051] For example, the external measuring device can be a graduated cylinder, a standard container in a flow meter calibration device, etc. This allows the volume of the liquid to be read directly based on the graduations on the graduated cylinder or standard container. Alternatively, the external measuring device can also be a water receiving pan scale, which calculates the volume by measuring the mass of the discharged fluid and combining this with the known fluid density. This invention does not specifically limit the external measuring device.

[0052] By using an external measuring device to measure the actual volume V1, errors that may exist in the internal flow measurement system of the fluid equipment can be avoided. Flow meters inside fluid equipment may become inaccurate due to prolonged use, wear, or the influence of impurities in the fluid. External measuring devices, on the other hand, are typically rigorously calibrated and verified, offering higher measurement accuracy and providing more reliable actual volume data.

[0053] Furthermore, this method offers significant flexibility, allowing for the selection of different types of external measuring devices to suit various needs. For small flow rate measurements, a measuring cylinder or micro-injector with a smaller range can be chosen; for large flow rate measurements, a large standard container or flow meter calibration device can be used.

[0054] Preferably, such as Figure 4 As shown, in the third embodiment, the fluid device has a built-in water receiver. The step of "obtaining the actual volume V1 of the fluid during the discharge process" specifically includes: The flow control component is controlled to operate in a preset mode for a first preset time; The volume of fluid received by the water receiver within the first preset time is taken as the actual volume V1.

[0055] Since the water receiver is built into the fluid equipment, there is no need to connect it to an external measuring device, reducing the number of connection points between devices and potential leakage points, thus improving the integration and reliability of the entire measuring system. At the same time, it also saves space occupied by external measuring devices, making the overall structure of the fluid equipment more compact.

[0056] Furthermore, the built-in water receiver makes the measurement process more convenient. Operators only need to control the flow control component to run according to the preset mode for a first preset time, and then directly measure the volume of fluid received in the water receiver. There is no need for complicated external device installation and debugging, which greatly shortens the measurement time and improves work efficiency.

[0057] Preferably, the fluid pipeline includes a cold water pipeline and a hot water pipeline, both of which are equipped with flow meters and flow control components. The control method includes flow calibration on the cold water pipeline and flow calibration on the hot water pipeline. The flow calibration method further includes: When calibrating the flow rate on the cold water line, shut off the hot water line; and / or When calibrating the flow rate on the hot water line, shut off the cold water line.

[0058] In fluid piping systems, although cold water and hot water lines operate independently, they may have some potential mutual influences. For example, when both lines are open simultaneously, the pressure distribution and fluid flow conditions within them may interfere with each other. This interference can lead to inaccurate flow meter measurements because flow meter measurement principles are typically based on specific fluid flow conditions. By closing one line while calibrating the flow rates of the cold water and hot water lines separately, this potential mutual interference can be eliminated, ensuring that the flow meter is calibrated under a relatively stable single fluid flow environment, thereby improving calibration accuracy.

[0059] Preferably, such as Figure 5As shown, in the fourth embodiment, the fluid device further includes a mixing chamber, and the outlet ends of both the cold water pipeline and the hot water pipeline are connected to the mixing chamber. The flow calibration method further includes: Obtain the user-defined target temperature T and target total flow rate Q; Based on the target temperature T and the target total flow rate Q, determine the required target flow rate Qh for hot water and the target flow rate Qc for cold water; The flow control components on the hot water pipeline and the cold water pipeline are controlled to stabilize the measured value F of the calibrated flow meter on the hot water pipeline at the target hot water flow rate Qh, and to stabilize the measured value F of the calibrated flow meter on the cold water pipeline at the target cold water flow rate Qc.

[0060] For example, the present invention uses temperature sensors to measure the temperature Tc of cold water in the cold water pipeline and the temperature Th of hot water in the hot water pipeline, respectively. Then, according to the heat conservation formula Qc×Tc+Qh×Th=(Qc+Qh), combined with the target total flow rate Q=Qc+Qh, the required target flow rate of hot water Qh and target flow rate of cold water Qc are obtained.

[0061] Based on the calculated target hot water flow rate Qh, the hot water flow rate is adjusted by controlling the flow control component on the hot water pipeline. Simultaneously, the measured value F of the calibrated flow meter on the hot water pipeline is read in real time and compared with the target hot water flow rate Qh. Based on the comparison result, the flow control component is continuously adjusted to stabilize the flow rate on the hot water pipeline at the target hot water flow rate Qh.

[0062] Similarly, based on the calculated target flow rate Qc of the cold water, the flow rate is adjusted by controlling the flow control component on the cold water pipeline. Simultaneously, the measured value F of the calibrated flow meter on the cold water pipeline is read in real time and compared with the target flow rate Qc. Based on the comparison result, the flow control component is continuously adjusted to stabilize the flow rate on the cold water pipeline at the target flow rate Qc.

[0063] When the flow rates of cold water and hot water are stabilized at the target flow rate of hot water Qh and the target flow rate of cold water Qc, respectively, they are fully mixed in the mixing chamber, and the output temperature is highly stable warm water.

[0064] Therefore, this invention ensures that hot and cold water are accurately mixed in the set ratio by precisely calculating the required target flow rates of hot and cold water and using calibrated flow meters for real-time monitoring and feedback control. This precise control method ensures that the output temperature of the warm water is highly consistent with the user-set target temperature, avoiding discomfort caused by excessive temperature fluctuations.

[0065] Furthermore, the present invention also provides a fluid device including a controller configured to perform the flow calibration method described above.

[0066] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method of flow calibration of a fluid device, characterized by, The fluid device comprises at least one fluid pipeline, a flow meter and a flow control component are arranged on the fluid pipeline, and the flow calibration method comprises the following steps: When the fluid device operates to reach a preset condition, the flow control component is controlled to operate in a preset mode to discharge fluid from the fluid pipeline; An actual volume V1 of the fluid during the discharging process is obtained; An actual volume V2 of the fluid measured by the flow meter during the discharging process is obtained; A calibration coefficient k of the flow meter is calculated based on the actual volume V1 and the actual volume V2; Subsequent measurement values F of the flow meter are calibrated based on the calibration coefficient k.

2. The flow calibration method of a fluid device according to claim 1, wherein, The fluid device further comprises a water storage tank, the fluid pipeline is in communication with the water storage tank, and water in the water storage tank can be discharged through the fluid pipeline, and the step of "obtaining the actual volume V1 of the fluid during the discharging process" specifically comprises the following steps: An initial liquid level H1 of the water storage tank before water is discharged and a final liquid level H2 of the water storage tank after water is discharged are obtained; The actual volume V1 is calculated according to a cross-sectional area S of the water storage tank and a liquid level change amount of the water storage tank; The liquid level change amount is a difference between the initial liquid level H1 and the final liquid level H2.

3. The flow calibration method of a fluidic device according to claim 1, wherein, The step of "obtaining the actual volume V1 of the fluid during the discharging process" specifically comprises the following steps: The flow control component is controlled to operate in the preset mode for a first preset time; The fluid discharged within the first preset time is received by an external measuring device, and a volume of the fluid is measured as the actual volume V1; or The fluid device is internally provided with a water receiver, and the step of "obtaining the actual volume V1 of the fluid during the discharging process" specifically comprises the following steps: The flow control component is controlled to operate in the preset mode for a first preset time; A volume of the fluid received by the water receiver within the first preset time is measured as the actual volume V1.

4. The flow calibration method of a fluidic device according to claim 1, wherein, The step of "calculating the calibration coefficient k of the flow meter based on V1 and V2" specifically comprises the following steps: k=k0×(V1 / V2); Wherein, k0 is an original coefficient of the flow meter.

5. The flow calibration method of a fluidic device according to claim 4, wherein, The step of "calibrating subsequent measurement values F of the flow meter based on the calibration coefficient k" specifically comprises the following steps: F=k×F0; Wherein, F0 is an original measurement value of the flow meter.

6. The flow calibration method of a fluidic device according to claim 1, wherein, The fluid pipeline comprises a cold water pipeline and a hot water pipeline, the flow meter and the flow control component are arranged on the cold water pipeline and the hot water pipeline, the control method comprises flow calibration on the cold water pipeline and flow calibration on the hot water pipeline, and the flow calibration method further comprises the following steps: When the flow calibration on the cold water pipeline is performed, the hot water pipeline is closed; and / or When the flow calibration on the hot water pipeline is performed, the cold water pipeline is closed.

7. The flow calibration method of a fluidic device according to claim 6, wherein, The fluid device further comprises a water mixing chamber, and outlet ends of the cold water pipeline and the hot water pipeline are in communication with the water mixing chamber, and the flow calibration method further comprises the following steps: A target temperature T and a target total flow Q set by a user are obtained; determining a hot water target flow rate Qh and a cold water target flow rate Qc required according to the target temperature T and the target total flow rate Q; controlling the flow control member on the hot water pipeline and the flow control member on the cold water pipeline so that the measured value F of the calibrated flow meter on the hot water pipeline is stabilized at the hot water target flow rate Qh and so that the measured value F of the calibrated flow meter on the cold water pipeline is stabilized at the cold water target flow rate Qc.

8. The flow calibration method of a fluidic device according to any one of claims 1 to 7, characterized by, the preset condition is that the cumulative running time of the fluid equipment reaches a second preset time, or the preset condition is that the cumulative water output of the fluid equipment reaches a preset water amount.

9. The flow calibration method of a fluidic device according to any one of claims 1 to 7, characterized by, the flow control member is an electromagnetic valve or a water pump.

10. A fluid device characterized by, a controller configured to be capable of executing the flow calibration method of any one of claims 1 to 9.

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