CN113465180B - Water flow sensor matching method and device and water heater - Google Patents

Abstract

The application relates to a water flow sensor matching method and device and a water heater. The water flow sensor matching method comprises the following steps: acquiring a detection signal output by a water flow sensor and the water temperatures of a water inlet and a water outlet; calling a water flow algorithm to process the detection signal to obtain theoretical water flow; judging whether a water flow algorithm is matched with a water flow sensor or not according to the temperature difference between the water temperature of the water outlet and the water temperature of the water inlet, the theoretical water flow and the preset reference power; and if the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and returning to the step of acquiring the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet until the updated water flow algorithm is matched with the water flow sensor. The method can effectively reduce production materials, improve production efficiency and avoid unstable water outlet temperature.

Description

Water flow sensor matching method and device and water heater

Technical Field

The application relates to the technical field of water heaters, in particular to a water flow sensor matching method and device, a water heater, computer equipment and a computer readable storage medium.

Background

With the improvement of living standard of people, the requirement on the water heater is higher and higher. Users want the water heater to output hot water quickly and stably, which requires flexible adjustment of the power of the heating device in the water heater to adjust the outlet water temperature of the water heater. The water intake of a water heater is an important parameter in the process of adjusting the power of a heating device. In the conventional technology, water flow is obtained through a water flow sensor by a common method. The water flow sensor converts water flow into a frequency value and outputs the frequency value to the water heater, and the water heater can process the frequency value fed back by the water flow sensor according to a water flow algorithm to obtain water flow.

However, because the water flow sensor is of a plurality of types, when the water flow sensor is not matched with the water heater, the water flow calculated by the water heater in the conventional technology according to the detection signal output by the water flow sensor is greatly different from the actual water flow, which affects the production efficiency of the water heater and brings inconvenience to the user in using the water heater.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a water flow algorithm matching method, which can accurately judge the matching condition between a water flow algorithm and a water flow sensor, and update the water flow algorithm in time.

The second technical problem to be solved by the present invention is to provide a water heater, which can accurately determine the matching condition between the water flow algorithm and the water flow sensor, and update the water flow algorithm in time.

The third technical problem to be solved by the present invention is to provide a water flow rate matching device, which can accurately judge the matching condition between the water flow rate algorithm and the water flow rate sensor, and update the water flow rate algorithm in time.

A fourth technical problem to be solved by the present invention is to provide a computer-readable storage medium, which can accurately determine the matching condition between a water flow algorithm and a water flow sensor, and update the water flow algorithm in time.

The first technical problem is solved by the following technical scheme:

a water flow algorithm matching method is applied to a water heater, the water heater comprises a water inlet, a water outlet, a heating device and a water flow sensor, the heating device is used for heating with preset reference power, the water flow sensor is used for detecting actual water flow of the water inlet and outputting a detection signal, and the method comprises the following steps: acquiring a detection signal output by a water flow sensor, the water temperature of a water inlet and the water temperature of a water outlet; calling a water flow algorithm to process the detection signal to obtain theoretical water flow; judging whether a water flow algorithm is matched with a water flow sensor or not according to the temperature difference between the water temperature of the water outlet and the water temperature of the water inlet, the theoretical water flow and the preset reference power; and if the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and returning to the step of acquiring the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet until the updated water flow algorithm is matched with the water flow sensor.

Based on the water flow algorithm matching method in the embodiment of the invention, the water flow algorithm used by the water heater is called to process the detection signal output by the water flow sensor to obtain the theoretical water flow, and whether the water flow algorithm is matched with the water flow sensor is judged according to the theoretical water flow and the temperature difference between the water inlet and the water outlet of the water heater. And when the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and repeating the acquisition, identification and updating processes until the updated water flow algorithm is matched with the water flow sensor. By using the water flow algorithm matching method in the embodiment, the matching condition between the water flow algorithm and the water flow sensor can be accurately judged, and the water flow algorithm can be updated in time. The main control material configured with the water flow algorithm matching method can be actively matched with different types of water flow sensors, and various main control materials corresponding to various water flow sensors do not need to be prepared, so that the production materials are effectively reduced, the production efficiency is improved, and the unstable outlet water temperature caused by the mismatching of the water flow algorithm and the water flow sensors is avoided.

In one embodiment, the step of judging whether the water flow algorithm is matched with the water flow sensor according to the temperature difference between the water temperature at the water inlet and the water temperature at the water outlet, the theoretical water flow and the preset reference power comprises the following steps: obtaining theoretical output power according to theoretical water flow and temperature difference; and if the absolute value of the difference between the theoretical output power and the preset reference power is greater than a first preset threshold value, judging that the water flow algorithm is not matched with the water flow sensor.

In one embodiment, the step of judging whether the water flow algorithm is matched with the water flow sensor according to the temperature difference between the water temperature at the water inlet and the water temperature at the water outlet, the theoretical water flow and the preset reference power comprises the following steps: obtaining reference water flow according to preset reference power and temperature difference; and if the absolute value of the difference between the theoretical water flow and the reference water flow is greater than a second preset threshold, judging that the water flow algorithm is not matched with the water flow sensor.

In one embodiment, the step of updating the water flow algorithm comprises: obtaining reference water flow according to preset reference power and temperature difference; determining a reference water flow sensor coefficient according to the reference water flow and the detection signal; and updating the water flow algorithm according to the reference water flow sensor coefficient.

In one embodiment, the step of updating the water flow algorithm based on the reference water flow sensor coefficients comprises: determining a water flow algorithm matched with the reference water flow sensor coefficient from the water flow algorithm set according to the reference water flow sensor coefficient; the water flow algorithm set comprises a plurality of water flow algorithms with different water flow sensor coefficients; and updating the current water flow algorithm into a water flow algorithm matched with the reference water flow sensor coefficient.

In one implementation, the water flow algorithm matching method further comprises the steps of: and if the times of the steps of obtaining the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet are greater than the first preset times, sending a fault prompt.

In one implementation, the water flow algorithm matching method further comprises the steps of: and if the water temperature of the water outlet is greater than the preset upper temperature limit, sending an alarm prompt.

The second technical problem is solved by the following technical solutions:

the utility model provides a water heater, includes delivery port, water inlet, heating device and water flow sensor, and water flow sensor is used for detecting the actual discharge of water inlet and exports detected signal, and water heater still includes: the first water temperature sensor is used for acquiring the water temperature of the water inlet; the second water temperature sensor is used for acquiring the water temperature of the water outlet; the controller comprises a memory and a processor, the memory stores a computer program, and the processor controls the heating device to heat at a preset reference power when executing the computer program; and steps for implementing any of the above water flow algorithm matching methods.

Based on the water heater in the embodiment of the invention, a water flow algorithm used by the water heater is called to process the detection signal output by the water flow sensor to obtain theoretical water flow, and whether the water flow algorithm is matched with the water flow sensor or not is judged according to the theoretical water flow and the temperature difference between the water inlet and the water outlet of the water heater. And when the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and repeating the acquisition, identification and updating processes until the updated water flow algorithm is matched with the water flow sensor. By using the water heater in the embodiment, the matching condition between the water flow algorithm and the water flow sensor can be accurately judged, and the water flow algorithm can be updated in time. Different kinds of water flow sensor can be initiatively matchd during this water heater, need not to prepare multiple master control material that corresponds with various water flow sensor when producing this water heater, can effectively reduce the production material, improve production efficiency and avoid the water flow algorithm and the water temperature instability that water flow sensor mismatch caused.

The third technical problem is solved by the following technical scheme:

the utility model provides a water flow algorithm matching device, is applied to a water heater, and the water heater includes water inlet, delivery port, heating device and water flow sensor, and heating device is used for heating with predetermineeing reference power, and water flow sensor is used for detecting the actual water flow of water inlet and exports detected signal, and the device includes: the data acquisition module is used for acquiring the detection signal, the water temperature of the water inlet and the water temperature of the water outlet;

the theoretical water flow calculation module is used for calling a water flow algorithm to process the detection signal to obtain theoretical water flow;

the judging module is used for judging whether the water flow algorithm is matched with the water flow sensor or not according to the temperature difference between the water temperature of the water inlet and the water temperature of the water outlet, the theoretical water flow and the preset reference power;

and the updating module is used for updating the water flow algorithm when the water flow algorithm is not matched with the water flow sensor, and instructing the data acquisition module to acquire the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet again until the updated water flow algorithm is matched with the water flow sensor.

Based on the water flow matching device in the embodiment of the invention, a water flow algorithm used by the water heater is called to process the detection signal output by the water flow sensor to obtain theoretical water flow, and whether the water flow algorithm is matched with the water flow sensor or not is judged according to the theoretical water flow and the temperature difference between the water inlet and the water outlet of the water heater. And when the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and repeating the acquisition, identification and updating processes until the updated water flow algorithm is matched with the water flow sensor. By using the water flow algorithm matching device in the embodiment, the matching condition between the water flow algorithm and the water flow sensor can be accurately judged, and the water flow algorithm can be updated in time. The main control material provided with the water flow algorithm matching device can be actively matched with different types of water flow sensors, various main control materials corresponding to various water flow sensors are not required to be prepared, the production materials are effectively reduced, the production efficiency is improved, and unstable water outlet temperature caused by mismatching of the water flow algorithm and the water flow sensors is avoided.

The fourth technical problem is solved by the following technical solutions:

a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any one of the embodiments of the water flow algorithm matching method described above.

Based on the computer readable storage medium in the embodiment of the invention, a water flow algorithm used by the water heater is called to process the detection signal output by the water flow sensor to obtain theoretical water flow, and whether the water flow algorithm is matched with the water flow sensor is judged according to the theoretical water flow and the temperature difference between the water inlet and the water outlet of the water heater. And when the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and repeating the acquisition, identification and updating processes until the updated water flow algorithm is matched with the water flow sensor. By using the computer readable storage medium in the embodiment, the matching condition between the water flow algorithm and the water flow sensor can be accurately judged, and the water flow algorithm can be updated in time. The main control material provided with the computer readable storage medium can be actively matched with different types of water flow sensors, various main control materials corresponding to various water flow sensors do not need to be prepared, the production materials are effectively reduced, the production efficiency is improved, and unstable outlet water temperature caused by mismatching of a water flow algorithm and the water flow sensors is avoided. The production materials can be effectively reduced, the production efficiency is improved, and the unstable outlet water temperature caused by the mismatching of the water flow algorithm and the water flow sensor is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram illustrating a usage scenario of a water flow algorithm matching method in one embodiment;

FIG. 2 is a schematic flow chart diagram of a water flow algorithm matching method in one embodiment;

FIG. 3 is a schematic flow chart illustrating an embodiment of determining whether a water flow algorithm is matched to a water flow sensor;

FIG. 4 is a schematic flow chart of an update water flow algorithm in one embodiment;

FIG. 5 is a schematic flow chart illustrating a method for determining whether the water flow algorithm matches the water flow sensor in accordance with yet another embodiment;

FIG. 6 is a schematic flow chart of an algorithm for updating water flow in yet another embodiment;

FIG. 7 is a schematic flow chart diagram of a water flow algorithm matching method in yet another embodiment;

FIG. 8 is a schematic diagram of the water heater in one embodiment;

FIG. 9 is a block diagram showing the structure of a water flow algorithm matching device in one embodiment;

description of reference numerals:

100-water heater, 103-water inlet, 103A-first water temperature sensor, 105-water outlet, 105A-second water temperature sensor and 107-water flow sensor.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," or "having," and the like, specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

As mentioned in the background of the invention, the water heater in the prior art has a problem that the water flow sensors cannot be automatically identified and matched, and the inventor finds that the problem is caused by a large number of water flow sensors, and different types of water flow sensors output different detection signals when detecting the same water flow. The water heater converts the detection signal into theoretical water flow according to a built-in water flow algorithm. Water heaters of the prior art are typically provided with only one water flow algorithm. In order to match with different water flow sensors, multiple main control materials need to be prepared during production, so that the production materials are increased, the burden of material management is increased, and the production efficiency is influenced. On the other hand, whether the water flow sensor is matched with the water heater or not is difficult to judge in appearance, the water flow sensor which is not matched but similar in appearance is possibly assembled on the water heater, and therefore deviation between theoretical water flow obtained by the water heater and actual water flow is large, the power of the water heater for adjusting the heating device according to the theoretical water flow is also large in deviation, water outlet temperature is suddenly high and suddenly low, and inconvenience is brought to users for using the water heater.

Based on the above problems, the embodiment of the present invention provides a water flow algorithm matching method, which in some embodiments is applied to a water heater 100 as shown in fig. 1, the water heater 100 includes a water inlet 103, a water outlet 105, a heating device for heating at a preset reference power, and a water flow sensor 107 for detecting an actual water flow of the water inlet 103 and outputting a detection signal. Fig. 2 shows a flowchart of the water flow algorithm matching method, and the method specifically includes steps S100 to S700.

S100, acquiring a detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105.

It will be appreciated that the detection signal is used to reflect the actual water flow rate at the water inlet 103. The magnetic element in the water flow sensor 107 rotates under the driving of the water flow in the water inlet 103, and the flow rate of the water flow is proportional to the rotation speed of the magnetic element, which is related to the detection signal. The condition of the actual water flow can be judged by analyzing the detection signal.

And S300, calling a water flow algorithm to process the detection signal to obtain theoretical water flow.

It will be appreciated that the water flow algorithm is used to calculate the theoretical water flow from the detected signal. The theoretical water flow rate is a theoretical value related to the actual water flow rate. Because the water flow sensor 107 outputs a detection signal rather than an actual water flow, the theoretical water flow can be obtained by processing the detection signal according to a water flow algorithm. In a daily usage scenario of the water heater 100, the water heater 100 may power adjust the heating device according to the theoretical water flow rate to adjust the water temperature at the water outlet 105.

S500, judging whether the water flow algorithm is matched with the water flow sensor 107 or not according to the temperature difference between the water temperature of the water inlet 103 and the water temperature of the water outlet 105, the theoretical water flow and the preset reference power.

S700, if the water flow algorithm is not matched with the water flow sensor 107, updating the water flow algorithm, and returning to the step of acquiring the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105 until the updated water flow algorithm is matched with the water flow sensor 107.

It will be appreciated that the water flow algorithm and the water flow sensor 107 are not matched to affect the user's use of the water heater 100, for example, if the calculated theoretical water flow exceeds the actual water flow, the water heater 100 may raise the power of the heating device by mistake, resulting in an over-high water temperature at the water outlet 105 of the water heater 100, and even possibly scalding the user. Or the calculated theoretical water flow is lower than the actual water flow more, the power of the heating device may be erroneously reduced by the water heater 100, so that the water temperature at the water outlet 105 of the water heater 100 is lower, and the user is cooled. Therefore, the water flow algorithm in the water heater 100 needs to be updated, the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105 are collected again, a new theoretical water flow is calculated according to the updated water flow algorithm, whether the updated water flow algorithm is matched with the water flow sensor 107 is judged, and if the updated water flow algorithm is not matched with the water flow sensor 107, the updated water flow algorithm is updated until the updated water flow algorithm is matched with the water flow sensor 107.

Based on the water flow algorithm matching method in the embodiment of the invention, the water flow algorithm used by the water heater 100 is called to process the detection signal output by the water flow sensor 107 to obtain the theoretical water flow, and whether the water flow algorithm is matched with the water flow sensor 107 is judged according to the theoretical water flow and the temperature difference between the water inlet 103 and the water outlet 105 of the water heater 100. When the water flow algorithm is not matched with the water flow sensor 107, the water flow algorithm is updated, and the processes of acquisition, identification and updating are repeated until the updated water flow algorithm is matched with the water flow sensor 107. By using the water flow algorithm matching method in the embodiment, the matching condition between the water flow algorithm and the water flow sensor 107 can be accurately judged, and the water flow algorithm can be updated in time. The main control material configured with the water flow algorithm matching method can be actively matched with different types of water flow sensors 107, and various main control materials corresponding to the various water flow sensors 107 do not need to be prepared, so that the production materials are effectively reduced, the production efficiency is improved, and the unstable outlet water temperature caused by the mismatching of the water flow algorithm and the water flow sensors 107 is avoided.

In one embodiment, as shown in fig. 3, the step S500 can be implemented by the steps S510 and S513.

And S510, obtaining theoretical output power according to the theoretical water flow and the temperature difference.

Specifically, the following equation (1) is commonly used in the art to reflect the quantitative relationship between the temperature difference between the water temperature at the outlet 105 and the water temperature at the inlet 103 of the water heater 100, the water flow rate, and the output power of the heating device:

P＝C×ΔT×V (1)

wherein P represents the output power of the heating device, C is a set conversion constant, Δ T represents the temperature difference between the water temperature at the outlet 105 and the water temperature at the inlet 103 of the water heater 100 (i.e., the water temperature at the outlet 105 of the water heater 100 is reduced by the water temperature at the inlet 103 of the water heater 100), and Q represents the water flow rate.

S513, if the absolute value of the difference between the theoretical output power and the preset reference power is greater than the first preset threshold, it is determined that the water flow algorithm is not matched with the water flow sensor 107.

It is understood that the theoretical output power obtained in the above step S510 is a theoretical value calculated according to the formula (1). When the water flow matching algorithm in the application is used, the heating device heats with a fixed preset reference power, so that the actual output power of the heating device is the preset reference power. If the water flow algorithm does not match the water flow sensor 107, the theoretical water flow will have a large deviation from the actual water flow, and the theoretical output power calculated from the theoretical water flow having a large deviation from the actual value will also have a large deviation from the actual value. Therefore, when the absolute value of the difference between the theoretical output power and the preset reference power is greater than the first preset threshold, it can be determined that the theoretical output power has a large deviation from the actual value, and it can be further determined that the water flow algorithm does not match the water flow sensor 107.

Further, in an embodiment, based on the embodiment that the step S510 and the step S513 are used to determine whether the water flow algorithm matches the water flow sensor 107, as shown in fig. 4, the step of updating the water flow algorithm in the step S700 can be implemented through the steps S710 to S715.

And S710, obtaining the reference water flow according to the preset reference power and the temperature difference.

It can be understood that the preset reference power is the actual output power of the heating device, and the reference water flow is obtained by the above formula (1) according to the actual temperature difference between the water temperature at the water outlet 105 of the water heater 100 and the actual output power, so that the reference water flow can better reflect the actual water flow.

And S713, determining a reference water flow sensor coefficient according to the reference water flow and the detection signal.

Specifically, the detection signal output from the normal water flow rate sensor 107 is a pulse signal, and the water flow rate is calculated from the frequency of the detection signal by a water flow rate algorithm. The water flow algorithm is shown in the following equation (2):

f＝K×Q-N (2)

in the formula, f represents the frequency of the detection signal, K represents the water flow sensor coefficient, Q represents the water flow, and N is a set constant.

It is understood that the frequency of the detection signal output by the water flow sensor 107 will also satisfy the formula (2), and the water flow sensor 107 will be tested by experiment at the time of factory shipment to obtain the formula (2) corresponding to the water flow sensor 107. The mismatching between the water flow algorithm in the water heater 100 and the water flow sensor 107 means that the difference between K in the water flow algorithm in the water heater 100 and K in the formula (2) corresponding to the water flow sensor 107 is large in the present embodiment, so that the difference between the theoretical water flow calculated by the water heater 100 according to the water flow algorithm and the detection signal and the actual water flow is large. The value of the reference water flow rate and the frequency value of the detection signal are substituted into the formula (2) to calculate the corresponding reference water flow rate sensor coefficient, and the reference water flow rate sensor coefficient has a small difference from the water flow rate sensor coefficient in the formula (2) corresponding to the water flow rate sensor 107 because the reference water flow rate has a small difference from the actual water flow rate.

And S715, updating the water flow algorithm according to the reference water flow sensor coefficient.

Specifically, the water flow algorithm is updated with the reference water flow sensor coefficient, so that the water flow sensor coefficient in the water flow algorithm is close to the reference water flow sensor coefficient.

In one embodiment, as shown in fig. 5, the step S500 can be further implemented by the steps S530 and S533.

And S530, obtaining the reference water flow according to the preset reference power and the temperature difference.

Step S530 is the same as step S710 described above, and the description thereof can be referred to.

S533, if the absolute value of the difference between the theoretical water flow and the reference water flow is greater than the second preset threshold, it is determined that the water flow algorithm is not matched with the water flow sensor 107.

It can be understood that if the water flow algorithm is not matched with the water flow sensor 107, the theoretical water flow will have a larger deviation from the actual water flow, and the reference water flow can better reflect the actual water flow, so that whether the water flow algorithm is matched with the water flow sensor 107 can be accurately determined by comparing the reference water flow with the theoretical water flow.

Further, based on the embodiment that determines whether the water flow algorithm matches the water flow sensor 107 in steps S530 and S533, the updating of the water flow algorithm in step S700 may be implemented as follows:

step 1, determining a reference water flow sensor coefficient according to the reference water flow and the detection signal.

And 2, updating the water flow algorithm according to the reference water flow sensor coefficient.

It is understood that the above manner is the same as the corresponding steps S713 and S715 in the above embodiments, and reference may be made to the above description. In the present embodiment, the reference water flow is obtained in step S530 when determining whether the water flow algorithm matches the water flow sensor 107, and the reference water flow is directly used when updating the water flow algorithm, and repeated calculation is not required.

In one embodiment, as shown in fig. 6, the above-mentioned updating the water flow algorithm according to the reference water flow sensor coefficient can be implemented by steps S800 and S803.

And S800, determining a water flow algorithm matched with the reference water flow sensor coefficient from the water flow algorithm set according to the reference water flow sensor coefficient.

The water flow algorithm set comprises a plurality of water flow algorithms with different water flow sensor coefficients.

The control device in the water heater 100 in this embodiment is exemplified by a computer device (such as an MCU) with a memory. A set of water flow algorithms is stored in memory. The frequency of the detection signal output by the water flow sensor 107 satisfies the formula (2), but the water flow sensors 107 of different types have different corresponding water flow sensor coefficients, and the water flow algorithm set includes a plurality of water flow algorithms with different water flow sensor coefficients. The water flow algorithm matched with the reference water flow sensor coefficient in the present embodiment means that the water flow sensor coefficient in the water flow algorithm is similar to the reference water flow sensor coefficient. In one embodiment, the reference water flow sensor coefficient is used as a reference, and compared with the water flow sensor coefficients in each water flow algorithm in the set of water flow algorithms, and the water flow algorithm corresponding to the water flow sensor coefficient with the minimum deviation from the reference water flow sensor coefficient is determined as the water flow algorithm matched with the reference water flow sensor coefficient. Further, all water flow algorithms corresponding to water flow sensors 107 commonly available on the market or used at production may be provided in the set of water flow algorithms.

And S803, updating the current water flow algorithm into a water flow algorithm matched with the reference water flow sensor coefficient.

Specifically, after a water flow algorithm matched with the reference water flow sensor coefficient is determined, the currently used water flow algorithm is switched to a water flow algorithm matched with the reference water flow sensor coefficient in the water flow algorithm set.

In one embodiment, as shown in fig. 7, the water flow algorithm matching method further includes step S900.

And S900, if the times of the steps of obtaining the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105 are greater than a first preset time, sending a fault prompt.

It can be understood that in the process of matching the water flow algorithm, if the water flow algorithm matching the water flow sensor 107 cannot be found through the loop from step S100 to step S700 many times, it can be considered that a fault occurs. The fault indication is used to reflect that the water heater 100 cannot be matched to the water flow sensor 107 or that the water flow sensor 107 is less accurate. The description will be continued by taking as an example a computer device with a memory as a control device in the water heater 100. After a number of cycles, matching may not be achieved, possibly because the set of water flow algorithms does not include a water flow algorithm corresponding to the water flow sensor 107, so that the water heater 100 cannot be matched with the water flow sensor 107. It is also possible that the current water flow rate sensor 107 has poor accuracy, so that the frequency of the output detection signal is greatly different from the frequency of the output detection signal of the normal water flow rate sensor 107 of the same type. The maintenance personnel can check whether the two conditions exist in a targeted manner according to the fault prompt so as to quickly eliminate the fault. Further, the fault indication may be displayed by a display device (e.g., a touch screen or a display screen) of the water heater 100, or a buzzer and/or an LED lamp may be disposed in the water heater 100, and the fault indication may be displayed by a buzzer and/or an LED lamp flashing.

In one embodiment, in order to avoid the water flow algorithm not matching the water flow sensor 107 and causing the water heater 100 to burn the user due to the high outlet water temperature, the water flow matching algorithm further comprises the following steps:

and if the water temperature of the water outlet 105 is higher than the preset upper temperature limit, giving an alarm prompt.

It can be understood that, since the heating device will be fixed to output the preset reference power when the water flow matching algorithm is used, it can be known from the above formula (1) that if the actual water flow is smaller, the temperature difference between the water temperature at the water inlet 103 and the water temperature at the water outlet 105 of the water heater 100 may be larger, that is, the water temperature at the water outlet 105 is increased to a higher temperature. In this case, the user may be burned if the user inadvertently touches the hot water output from the water using device. In order to avoid the accident that the user is scalded, when the water temperature of the water outlet 105 is detected to be higher than the preset upper temperature limit, an alarm prompt is sent out to remind the user not to contact with hot water. Further, a buzzer may be provided in the water heater 100, and the buzzer sounds an alarm prompt to the user. If the water heater 100 is far away from the water consuming device so that the user cannot hear the buzzer, the buzzer can be arranged at the position of the water consuming device directly.

It should be understood that although the various steps in the flowcharts of fig. 2-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.

An embodiment of the present invention further provides a water heater 100, as shown in fig. 8, including a water outlet 105, a water inlet 103, a heating device, and a water flow sensor 107, where the water flow sensor 107 is configured to detect an actual water flow of the water inlet 103 and output a detection signal. The water heater 100 also includes a first water temperature sensor 103A, a second water temperature sensor 105A, and a controller. The first water temperature sensor 103A is used to acquire the water temperature of the water inlet 103. The second water temperature sensor 105A is used to acquire the water temperature at the water outlet 105.

The controller is connected with the heating device, the water flow sensor 107, the first water temperature sensor 103A and the second water temperature sensor 105A, the controller comprises a memory and a processor, the memory stores a computer program, and the processor realizes that the heating device is controlled to heat at a preset reference power when executing the computer program; and steps for implementing any of the above water flow algorithm matching method embodiments.

In some embodiments, the water heater may be a gas water heater or an electric water heater.

An embodiment of the present invention further provides a water flow matching device, which is applied to a water heater 100, the water heater 100 includes a water inlet 103, a water outlet 105, a heating device and a water flow sensor 107, the heating device is configured to heat with a preset reference power, the water flow sensor 107 is configured to detect an actual water flow of the water inlet 103 and output a detection signal, as shown in fig. 9, the device includes: a data acquisition module 710, a theoretical water flow calculation module 720, a judgment module 730 and an update module 740; wherein:

the data acquisition module 710 is used for acquiring the detection signal, the water temperature of the water inlet 103 and the water temperature of the water outlet 105;

the theoretical water flow calculation module 720 is used for calling a water flow algorithm to process the detection signal to obtain theoretical water flow;

the judging module 730 is used for judging whether the water flow algorithm is matched with the water flow sensor 107 or not according to the temperature difference between the water temperature of the water inlet 103 and the water temperature of the water outlet 105, the theoretical water flow and the preset reference power;

the updating module 740 is configured to update the water flow algorithm when the water flow algorithm is not matched with the water flow sensor 107, and instruct the data obtaining module 710 to obtain the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103, and the water temperature of the water outlet 105 again until the updated water flow algorithm is matched with the water flow sensor 107.

In one embodiment, the determining module 730 is further configured to obtain a theoretical output power according to the theoretical water flow and the temperature difference; and if the absolute value of the difference between the theoretical output power and the preset reference power is greater than the first preset threshold, determining that the water flow algorithm is not matched with the water flow sensor 107.

In one embodiment, the determining module 730 is further configured to obtain a reference water flow according to a preset reference power and a temperature difference; and if the absolute value of the difference between the theoretical water flow and the reference water flow is greater than a second preset threshold, determining that the water flow algorithm is not matched with the water flow sensor 107.

In one embodiment, the updating module 740 is further configured to obtain a reference water flow according to a preset reference power and a temperature difference; determining a reference water flow sensor coefficient according to the reference water flow and the detection signal; and updating the water flow algorithm according to the reference water flow sensor coefficient.

In one embodiment, the update module 740 is further configured to determine a water flow algorithm from the set of water flow algorithms that matches the reference water flow sensor coefficients based on the reference water flow sensor coefficients; the water flow algorithm set comprises a plurality of water flow algorithms with different water flow sensor coefficients; and updating the current water flow algorithm to a water flow algorithm matched with the reference water flow sensor coefficients.

In one embodiment, the water flow algorithm matching device further includes a fault prompting module, and the fault prompting module is configured to send a fault prompt if the number of the steps of obtaining the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105 is greater than a first preset number.

In one embodiment, the water flow algorithm matching device further comprises an alarm module, and the alarm module is configured to send an alarm prompt if the water temperature at the water outlet 105 is greater than a preset upper temperature limit.

For specific definition of the water flow algorithm matching device, reference may be made to the above definition of the water flow algorithm matching method, which is not described herein again. The modules in the water flow algorithm matching device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:

acquiring a detection signal output by a water flow sensor 107, the water temperature of a water inlet 103 and the water temperature of a water outlet 105;

calling a water flow algorithm to process the detection signal to obtain theoretical water flow;

judging whether the water flow algorithm is matched with the water flow sensor 107 or not according to the temperature difference between the water temperature of the water outlet 105 and the water temperature of the water inlet 103, the theoretical water flow and the preset reference power;

if the water flow algorithm is not matched with the water flow sensor 107, the water flow algorithm is updated, and the step of obtaining the detection signal output by the water flow sensor 107, the water temperature of the water inlet 103 and the water temperature of the water outlet 105 is returned until the updated water flow algorithm is matched with the water flow sensor 107.

In some embodiments, the computer program when executed by the processor further performs the steps of any of the above-described water flow algorithm matching method embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A water flow algorithm matching method is applied to a water heater, wherein the water heater comprises a water inlet, a water outlet, a heating device and a water flow sensor, the water flow sensor is used for detecting actual water flow of the water inlet and outputting a detection signal, the heating device is used for heating at a preset reference power, and the method comprises the following steps:

acquiring a detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet;

calling a water flow algorithm to process the detection signal to obtain theoretical water flow;

judging whether the water flow algorithm is matched with the water flow sensor or not according to the temperature difference between the water temperature of the water outlet and the water temperature of the water inlet, the theoretical water flow and the preset reference power;

if the water flow algorithm is not matched with the water flow sensor, updating the water flow algorithm, and returning to the step of acquiring the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet until the updated water flow algorithm is matched with the water flow sensor.

2. The water flow algorithm matching method according to claim 1, wherein the step of judging whether the water flow algorithm is matched with the water flow sensor according to the temperature difference between the water temperature of the water inlet and the water temperature of the water outlet, the theoretical water flow and the preset reference power comprises:

obtaining theoretical output power according to the theoretical water flow and the temperature difference;

and if the absolute value of the difference between the theoretical output power and the preset reference power is greater than a first preset threshold, judging that the water flow algorithm is not matched with the water flow sensor.

3. The water flow algorithm matching method according to claim 1, wherein the step of judging whether the water flow algorithm is matched with the water flow sensor according to the temperature difference between the water temperature of the water inlet and the water temperature of the water outlet, the theoretical water flow and the preset reference power comprises:

obtaining a reference water flow according to the preset reference power and the temperature difference;

and if the absolute value of the difference between the theoretical water flow and the reference water flow is greater than a second preset threshold, determining that the water flow algorithm is not matched with the water flow sensor.

4. The water flow algorithm matching method of claim 1, wherein the step of updating the water flow algorithm comprises:

obtaining a reference water flow according to the preset reference power and the temperature difference;

determining a reference water flow sensor coefficient according to the reference water flow and the detection signal;

and updating the water flow algorithm according to the reference water flow sensor coefficient.

5. The water flow algorithm matching method of claim 4, wherein said step of updating said water flow algorithm based on said reference water flow sensor coefficients comprises:

determining a water flow algorithm matched with the reference water flow sensor coefficient from a water flow algorithm set according to the reference water flow sensor coefficient; wherein the water flow algorithm set comprises a plurality of water flow algorithms with different water flow sensor coefficients;

updating the current water flow algorithm to the water flow algorithm matched with the reference water flow sensor coefficient.

6. The water flow algorithm matching method of claim 1, further comprising:

and if the times of returning to the step of acquiring the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet are greater than a first preset time, sending a fault prompt.

7. The water flow algorithm matching method of claim 1, further comprising:

and if the water temperature of the water outlet is greater than the preset upper temperature limit, sending an alarm prompt.

8. The utility model provides a water heater, includes delivery port, water inlet, heating device and water flow sensor, water flow sensor is used for detecting the actual discharge of water inlet and output detected signal, its characterized in that still includes:

the first water temperature sensor is used for acquiring the water temperature of the water inlet;

the second water temperature sensor is used for acquiring the water temperature of the water outlet;

the controller comprises a memory and a processor, the memory stores a computer program, and the processor realizes the step of controlling the heating device to heat at a preset reference power when executing the computer program; and steps for implementing the method of any one of claims 1 to 7.

9. The utility model provides a water flow algorithm matching device, is applied to a water heater, the water heater includes water inlet, delivery port, heating device and water flow sensor, water flow sensor is used for detecting the actual water flow of water inlet and output detected signal, its characterized in that, heating device is used for heating with predetermineeing the benchmark power, the device includes:

the data acquisition module is used for acquiring the detection signal, the water temperature of the water inlet and the water temperature of the water outlet;

the theoretical water flow calculation module is used for calling a water flow algorithm to process the detection signal to obtain theoretical water flow;

the judging module is used for judging whether the water flow algorithm is matched with the water flow sensor or not according to the temperature difference between the water temperature of the water inlet and the water temperature of the water outlet, the theoretical water flow and the preset reference power;

and the updating module is used for updating the water flow algorithm when the water flow algorithm is not matched with the water flow sensor, and instructing the data acquisition module to acquire the detection signal output by the water flow sensor, the water temperature of the water inlet and the water temperature of the water outlet again until the updated water flow algorithm is matched with the water flow sensor.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.

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