CN110425745B - Method and device for water heater and water heater - Google Patents
Method and device for water heater and water heater Download PDFInfo
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- CN110425745B CN110425745B CN201910677975.0A CN201910677975A CN110425745B CN 110425745 B CN110425745 B CN 110425745B CN 201910677975 A CN201910677975 A CN 201910677975A CN 110425745 B CN110425745 B CN 110425745B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
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Abstract
The invention relates to the field of water heater control, and discloses a method and a device for a water heater and the water heater. Due to the fact that the pressure sensor is high in sensitivity, water leakage of the water heater can be accurately identified through the detection method, faults of the water heater can be found in time, follow-up fault processing is conducted, users can conduct processing such as heating of the water heater is turned off or maintenance is conducted conveniently, and user experience is improved.
Description
Technical Field
The invention relates to the field of water heater control, in particular to a method and a device for a water heater and the water heater.
Background
The water heater can sometimes leak water after being used for a long time at home of a user, for example, the water heater is caused by poor sealing of a connector of a water pipe, poor welding of a machine body or corrosion and scaling and the like. At present, in the prior art, whether water leakage exists is generally determined by detecting the front and back change of flow, and the scheme has high misjudgment rate in actual application and is difficult to popularize and use.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for a water heater and the water heater, so as to solve the problem that a water leakage detection scheme of the water heater in the prior art is inaccurate.
In order to achieve the above object, the present invention provides, in one aspect, a method for a water heater, in which a pressure sensor is provided in a water inlet pipe outside a body of the water heater, the pressure sensor being used for detecting a pressure of water, the method comprising:
acquiring a pressure value indicative of a pressure of the water;
determining a frequency value associated with the pressure value according to the pressure value; and
and determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value.
Preferably, the determining of the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value comprises:
and determining water leakage of the water heater under the condition that the change of the pressure value is not synchronous with the change of the frequency value.
Preferably, determining a water heater leak comprises:
determining that the water heater leaks under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or
And determining the water heater to be a pipe burst under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly rises to exceed the first frequency value.
Preferably, when the water heater is determined to be leaked, the pressure value is suddenly reduced to a first pressure value from an initial pressure value when the water heater is not used; and
and when the water heater is determined to be pipe burst, the pressure value is suddenly reduced from the initial pressure value to a second pressure value.
Preferably, the sudden drop of the pressure value to the first pressure value comprises a sudden drop of the pressure value from an initial pressure value when the water heater is not in use to the first pressure value; and
the sudden drop in pressure value to the second pressure value comprises a sudden drop in pressure value from the initial pressure value to the second pressure value.
Preferably, the method further comprises:
detecting a pressure value of the water heater in a preset time under an unused state;
and determining an initial pressure value according to the pressure value.
Preferably, the water heater is further provided with a flow sensor in the water inlet pipe, the flow sensor being used for detecting the flow of water, the method further comprising:
acquiring a flow value indicating the flow rate of water;
and determining that the flow sensor fails when the change in the flow value is not synchronous with the change in the frequency value.
In yet another aspect, the present invention provides an apparatus for a water heater, comprising:
a pressure sensor disposed in the water inlet pipe outside the housing of the water heater, configured to detect a pressure of the water;
a processor, in communication with the pressure sensor, configured to:
acquiring a pressure value indicative of a pressure of the water;
determining a frequency value associated with the pressure value according to the pressure value; and
and determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value.
Preferably, the determining of the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value comprises:
and determining water leakage of the water heater under the condition that the change of the pressure value is not synchronous with the change of the frequency value.
Preferably, determining a water heater leak comprises:
determining that the water heater leaks under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or
And determining the water heater to be tube burst under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly drops to exceed the first frequency value.
Preferably, the sudden drop of the pressure value to the first pressure value comprises a sudden drop of the pressure value from an initial pressure value when the water heater is not in use to the first pressure value; and
the sudden drop in pressure value to the second pressure value comprises a sudden drop in pressure value from the initial pressure value to the second pressure value.
Preferably, the processor is further configured to:
detecting a pressure value of the water heater in a preset time under an unused state;
and determining an initial pressure value according to the pressure value.
Preferably, the device further comprises a flow sensor disposed in the water inlet pipe, the flow sensor for detecting the flow of water, the processor further configured to:
acquiring a flow value indicating the flow rate of water;
and determining that the flow sensor fails when the change in the flow value is not synchronous with the change in the frequency value.
Preferably, after determining that the water heater has a water leak, the processor is further configured to:
determining the water leakage amount of the water heater according to the frequency value;
outputting corresponding prompt information according to the water leakage amount, and
and controlling the water heater to stop heating under the condition that the water leakage amount is greater than the preset amount.
The invention further provides a water heater, which comprises a body, and a water inlet pipe and a water outlet pipe which are arranged on the body.
According to the technical scheme, the method for the water heater comprises the steps of obtaining the pressure value detected by the pressure sensor in the water inlet pipe arranged outside the shell of the water heater, determining the frequency value associated with the pressure value according to the pressure value, and determining the water leakage state of the water heater according to the change trend of the pressure value and the frequency value. Due to the fact that the pressure sensor is high in sensitivity, water leakage of the water heater can be accurately identified through the detection method, faults of the water heater can be found in time, follow-up fault processing is conducted, users can conduct processing such as heating of the water heater is turned off or maintenance is conducted conveniently, and user experience is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a flow chart of a first embodiment of a method of the present invention for use with a water heater;
FIG. 2 is a flow chart of a fourth embodiment of the method of the present invention for a water heater;
FIG. 3 is a block diagram of the apparatus of the present invention for use with a water heater;
FIG. 4 is a schematic view of the inlet pipe of the water heater of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
fig. 6 is a sectional view of B-B in fig. 5.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The embodiment of the invention firstly provides a method for a water heater, the water heater can be a gas water heater or an electric water heater, taking the electric water heater as an example, the method comprises a shell, an inner container and a heater, wherein the shell is provided with a water inlet pipe and a water outlet pipe, the inner container is arranged in the shell, a water storage cavity is limited in the inner container, and the water inlet pipe and the water outlet pipe are respectively communicated with the water storage cavity.
The water inlet pipe part outside the shell of the water heater is also provided with a pressure sensor for detecting the pressure value of water, and particularly, the pressure sensor is arranged at the part of the water inlet pipe, which is positioned between the water inlet valve and the shell.
As shown in fig. 1: the method based on the water heater comprises the following steps:
step S100, acquiring a pressure value indicating the pressure of water;
step S200, determining a frequency value associated with the pressure value according to the pressure value; and
and step S300, determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value.
In step S100, the pressure sensor may specifically be an MEMS (micro electro Mechanical Systems) pressure sensor, which belongs to a novel pressure sensor, and is a thin film element that deforms when receiving pressure, and a detection circuit such as a wheatstone detection bridge circuit is provided inside the thin film element, so to speak, a detection mode based on capacitance change, so as to convert the deformation into an electrical signal for output. In particular, it belongs to the prior art and will not be described in detail herein.
When the pressure sensor works, when the pressure sensor is arranged in a water path of the water inlet pipe, if no water flow exists in the water path and the water path is in an idle state, the pressure sensor detects the atmospheric pressure, if the standard atmospheric pressure is 0.1MPa, after water enters the water inlet pipe, because the water pressure exists in the water path, if the water pressure in a water pipe in a general user house is about 0.3MPa, when a user uses a water heater, the water flow flows through the water inlet pipe, the pressure in the water path can be released partially, the pressure sensor detects that the pressure is reduced, and therefore the pressure sensor can immediately output a corresponding electric signal according to the current pressure.
In step S200, when determining the frequency value of the pressure according to the pressure values, a series of pressure values detected by the pressure sensor may be detected within a period of time, and then the data of the pressure values are subjected to a numerical processing such as laplace transform to obtain a frequency spectrum formed by a series of frequency values of the reaction pressure change, and a specific value thereof is selected as the determined frequency value, for example, a maximum value thereof is selected as the determined frequency value.
In step S300, the pressure value and the frequency value may be monitored in real time within a preset time, specifically, the pressure value and the frequency value may be monitored in real time at a short time interval, for example, the pressure value of the pressure sensor is collected at a period of 5ms, and the value is converted into the frequency value, so that the monitoring may be performed at a period of 5 ms. And further analyzing the variation trends of the pressure value and the frequency, determining whether the water heater leaks water according to the variation trends of the pressure value and the frequency, and further obtaining a specific water leakage state. Specifically, tests show that the water leakage of the water heater can be determined under the condition that the change of the pressure value and the change of the frequency are not synchronous. If the pressure value is detected to be in an increasing state within a period of time, and the spectrum value has no change or basically fluctuates little around a value in the period of time, the trend of the change of the spectrum value and the spectrum value is different, and the water leakage state of the water heater is confirmed.
According to the detection method for the water heater, disclosed by the embodiment of the invention, the pressure value detected by the pressure sensor in the water inlet pipe arranged outside the shell of the water heater is obtained, the frequency value associated with the pressure value is determined according to the pressure value, and the water leakage state of the water heater is determined according to the change trend of the pressure value and the frequency value. Due to the fact that the pressure sensor is high in sensitivity, water leakage of the water heater can be accurately identified through the detection method, faults of the water heater can be found in time, follow-up fault processing is conducted, users can conduct processing such as heating of the water heater is turned off or maintenance is conducted conveniently, and user experience is improved.
In a preferred embodiment of the present invention, the determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value comprises:
and determining water leakage of the water heater under the condition that the change of the pressure value is not synchronous with the change of the frequency value.
Experiments show that when the water heater is not used at ordinary times and the water inlet pipe is filled with water, the pressure in the water channel is a fixed value, such as about 0.3MPa, so that the pressure sensor detects a stable pressure value, and the corresponding pressure changes to a tiny fluctuation value or even does not fluctuate, namely, the frequency value of the corresponding pressure is a tiny value or even zero; when the water heater is used, water in the water inlet pipe flows, the pressure is reduced and reaches another stable pressure value, and the pressure of the water in the water inlet pipe changes regularly at the moment because the water continuously impacts the surface of the pressure sensor, namely the corresponding frequency value is increased to a stable frequency value. Therefore, under the two normal states of the water heater, the pressure value and the frequency value are synchronously changed, namely, the pressure value and the frequency value are changed from the corresponding stable value when the water heater is not used to the corresponding stable value when the water heater is used, namely, the frequency value is increased along with the synchronous increase when the pressure value is decreased. When the water heater leaks, for example, when the water heater leaks in an unused state, the pressure value of the water heater changes to another stable value, namely, the pressure value changes from one stable value to another corresponding stable value; the frequency value is not changed and is basically the same as that in the case of no leakage, so that the frequency value is always kept at a stable value, and when the water heater leaks, the pressure value is changed, the frequency value is not changed, and the two changes are asynchronous, so that the water leakage can be determined.
Specifically, it is determined through experiments that, in the case where no water leakage occurs, the frequency and the pressure have a stepwise linear relationship, that is, the frequency and the pressure form a function: frequency f (pressure).
It should be noted that, the pressure value and the frequency value are synchronized, and not both of them change in the same trend, but both of them change simultaneously, for example, when the water heater is not used to use, the pressure value is decreased from one stable pressure value to another stable pressure value, and the frequency value is increased from one stable frequency value to another stable frequency value, the magnitude of both of them change in the opposite trend, but the change is simultaneous, if both of them change not simultaneously, it is determined that there is water leakage.
In a preferred embodiment of the present invention, determining a water leak in a water heater comprises:
determining that the water heater leaks under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly drops to exceed the first frequency value, determining that the water heater is burst.
The embodiment is based on the above embodiment and specifically determines two common states of water leakage of the water heater, namely water leakage and pipe explosion.
Specifically, according to experimental tests, when the water heater sends a leak, the pressure value suddenly decreases from the current value to the first pressure value within a very short time, such as 1 second, and the frequency value remains stable, where the stability may be specifically that the frequency is maintained unchanged, or the frequency is maintained to fluctuate within a small range, such as the frequency is maintained to fluctuate by 1% -5% of the reference frequency, and the frequency value is considered to be maintained stable.
When the water heater sends a pipe burst, the pressure value is suddenly reduced to a second pressure value from the current value in a very short time, wherein the second pressure value is smaller than the first pressure value, because the pressure in the water flow discharged during the pipe burst is more, the frequency value is suddenly increased to a preset maximum value, namely the first frequency value, and because the impact of the water flow on the pressure sensor is maximum at the moment, the pressure change is maximum, namely the corresponding frequency value is maximum.
Specifically, according to the actual use state of the water heater, when the water heater is installed at a home of a user, the unused time is more, so when leakage or pipe explosion occurs, the water heater is not used at a relatively high probability, and some water heaters are used at the same time. Thus, according to these two states, the pressure value or the frequency value, respectively, differs from the initial value at which the current value is mutated.
When the water heater is not in use, the pressure value is an initial pressure value, the corresponding frequency is also an initial frequency value, when leakage occurs, the pressure value is suddenly reduced from the initial pressure value to a first pressure value, and the frequency is maintained to be stable at the initial frequency value; when the tube explosion happens, the pressure value is suddenly reduced from the initial pressure value to a second pressure value smaller than the first pressure value, because the water pressure is basically not existed during the tube explosion, the second pressure value is the standard atmospheric pressure which is basically the same as the value detected by the pressure sensor in the open state, and the frequency value is suddenly increased from the initial frequency value to exceed the first frequency value.
Specifically, when determining the initial pressure value, the method includes:
monitoring a pressure value of the water heater in a preset time under an unused state;
and determining an initial pressure value according to the pressure value.
Since the pressure in the water pipes of different user residences actually varies, for example, the water pressure on different floors varies, or the water supply pressure in different cells also varies, the initial pressure value needs to be determined according to the actual situation.
Specifically, after the water heater is installed, when the water heater is not used, the data of the pressure value is monitored within a preset time such as 5 days, the data may be data of upper and lower fluctuation values, and then the data is processed according to the data to determine the initial pressure value, for example, the data with very large fluctuation can be removed and then the data is averaged to obtain the initial pressure value. Therefore, the determined initial pressure value is accurate, and the subsequent water leakage state identification is also accurate.
When the water heater is in a use state, the pressure value is a stable third pressure value, the third pressure value is smaller than the initial pressure value and is larger than the first pressure value, the frequency value is a stable second frequency value, the second frequency value is larger than the initial frequency value and is smaller than the first frequency value, when leakage occurs, the pressure value is suddenly reduced from the third pressure value to the first pressure value, and the frequency is reduced from the second frequency value to the initial frequency value; when the tube explosion happens, the pressure value is suddenly reduced from the third pressure value to a second pressure value smaller than the first pressure value, and the frequency value is suddenly increased from the second frequency value to exceed the first frequency value.
The specific values of the above mentioned pressures and frequencies at the various stages are shown in the following table:
wherein: initial frequency value < second frequency value < first frequency value; and is
Initial pressure value > third pressure value > first pressure value > second pressure value.
In a preferred embodiment of the present invention, the water heater is further provided with a flow sensor in the water inlet pipe, the flow sensor is used for detecting the flow of water, as shown in fig. 2, the method further comprises:
s400, acquiring a flow value indicating the flow of water;
and step S500, determining that the flow sensor has faults under the condition that the change of the flow value is not synchronous with the change of the frequency value.
In this embodiment, still further set up the flow sensor who detects the flow of water in the inlet tube to detect the water consumption of water heater, can make things convenient for the water heater to take suitable heating methods according to the inflow in order to realize more quick heating water, also make things convenient for the user to look over the water condition of water heater simultaneously.
And flow sensor is fragile in the use, and does not have more reliable mode in time to detect at present, and this embodiment is through mutually supporting in order to solve above-mentioned problem with pressure sensor.
Specifically, experiments show that in the use process, if the water flow is increased, the corresponding frequency is also increased, the change of the water flow and the frequency is synchronous, and if the increasing trend of the water flow is not synchronous with the increasing trend of the frequency, the flow sensor can be confirmed to be in fault. Because the pressure sensor has a longer life than the flow sensor and is less prone to failure, the frequency value determined by detecting the pressure with the pressure sensor can be used to determine whether the flow sensor is out of order.
In a preferred embodiment of the present invention, after determining that there is a water leak in the water heater, the method further comprises:
determining the water leakage amount of the water heater according to the frequency value;
outputting corresponding prompt information according to the water leakage amount, and
and controlling the water heater to stop heating under the condition that the water leakage amount is greater than the preset amount.
In this embodiment, because the frequency value detected by the pressure sensor is relatively sensitive, particularly, the MEMS pressure sensor is used to reflect the instantaneous change of the pressure in the water path, and the speed of the change of the pressure corresponds to the flow rate of the water flow, so the amount of water flowing through the water inlet pipe can be estimated according to the frequency value, i.e., the amount of water leakage can be estimated, and corresponding processing can be performed according to the amount of water leakage. If the water leakage is greater than 1 liter/minute, indicating that the water leakage is large, controlling the water heater to stop heating, specifically closing an air valve for the gas water heater to stop the burner, and if the water heater is an electric water heater, closing the heating pipe to prevent risks caused by continuous heating, and simultaneously giving a corresponding prompt, for example, displaying red through an indicator lamp to give a danger prompt, and further if the water heater is connected with a network remote end, giving a remote control APP prompt message to prompt a user of the current water leakage; and if when the volume of leaking water is less than or equal to 1 liter/minute, it is relatively little to explain to leak, can not influence the normal work of water heater this moment, consequently needn't stop heating, and accessible pilot lamp turns yellow and gives the warning suggestion, gives remote control APP's relevant suggestion simultaneously.
The invention also provides a device for the water heater, which can be a gas water heater or an electric water heater, taking the electric water heater as an example, the device comprises a shell, an inner container and a heater, wherein the shell is provided with a water inlet pipe and a water outlet pipe, the inner container is arranged in the shell, a water storage cavity is limited in the inner container, and the water inlet pipe and the water outlet pipe are respectively communicated with the water storage cavity.
As shown in fig. 3, the device includes a pressure sensor 10 and an MCU or a processor 20, wherein the pressure sensor 10 is disposed in the inlet pipe outside the housing of the water heater for detecting the pressure value of water, specifically, the pressure sensor 10 is disposed at a portion of the inlet pipe between the inlet valve and the housing, and the processor 20 communicates with the pressure sensor 10 to obtain the pressure value.
The device may further include a display 40 for displaying control and status information of the water heater output by the processor 20,
the processor 20 based on the above-described apparatus is configured to:
acquiring a pressure value indicative of a pressure of the water; determining a frequency value associated with the pressure value according to the pressure value; and determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value.
The pressure sensor 10 may be specifically an MEMS (micro electro Mechanical Systems) pressure sensor, which belongs to a novel pressure sensor, and is a thin film element that deforms when receiving pressure, and a detection circuit such as a wheatstone detection bridge circuit is provided inside the thin film element, so that the deformation is converted into an electrical signal to be output based on a detection mode of capacitance change. In particular, it belongs to the prior art and will not be described in detail herein.
When the pressure sensor 10 is in operation, when the pressure sensor 10 is disposed in the water path of the water inlet pipe, if there is no water flow in the water path and the water path is in an idle state, the pressure sensor 10 detects atmospheric pressure, for example, the standard atmospheric pressure is 0.1MPa, after the water inlet pipe enters water, because there is water pressure in the water path, for example, the water pressure in the water pipe in a general user house is about 0.3MPa, when there is water flow in the water inlet pipe when the user uses the water heater, the pressure in the water path will release a part, so the pressure sensor 10 detects that the pressure becomes small, and the pressure sensor 10 will output a corresponding electrical signal according to the current pressure instantly.
When the frequency value of the pressure is determined according to the pressure values, a series of pressure values detected by the pressure sensor 10 may be detected within a period of time, and then the data of the pressure values may be subjected to a numerical processing such as laplace transform to obtain a frequency spectrum formed by a series of frequency values of the change in the reaction pressure, and a specific value thereof may be selected as the determined frequency value, for example, a maximum value thereof may be selected as the determined frequency value.
The pressure value and the frequency value can be monitored in real time within a preset time, specifically, the pressure value and the frequency value can be monitored in real time at a short time interval, for example, the pressure value of the pressure sensor 10 is collected at a period of 5ms, and the numerical value is converted into the frequency value, so that the monitoring can be performed at a period of every 5 ms. And further analyzing the variation trends of the pressure value and the frequency, determining whether the water heater leaks water according to the variation trends of the pressure value and the frequency, and further obtaining a specific water leakage state. Specifically, tests show that the water leakage of the water heater can be determined under the condition that the change of the pressure value and the change of the frequency are not synchronous. If the pressure value is detected to be in an increasing state within a period of time, and the spectrum value has no change or basically fluctuates little around a value in the period of time, the trend of the change of the spectrum value and the spectrum value is different, and the water leakage state of the water heater is confirmed.
The detection device for the water heater of the invention obtains the pressure value detected by the pressure sensor 10 arranged in the water inlet pipe outside the shell of the water heater, determines the frequency value associated with the pressure value according to the pressure value, and determines the water leakage state of the water heater according to the change trend of the pressure value and the frequency value. Due to the fact that the sensitivity of the pressure sensor 10 is high, water leakage of the water heater can be accurately identified through the detection method, faults of the water heater can be found in time, follow-up fault processing is conducted, users can conduct processing such as heating of the water heater is turned off or maintenance is conducted conveniently, and user experience is improved.
In a preferred embodiment of the present invention, the determining the water leakage state of the water heater according to the variation trend of the pressure value and the frequency value comprises:
and determining water leakage of the water heater under the condition that the change of the pressure value is not synchronous with the change of the frequency value.
Experiments show that when the water heater is not used at ordinary times and the water inlet pipe is filled with water, the pressure in the water path is a fixed value, such as about 0.3MPa, so that the pressure sensor 10 detects a stable pressure value, and the corresponding pressure changes to a tiny fluctuation value or even does not fluctuate, namely, the frequency value of the corresponding pressure is a tiny value or even zero; when the water heater is used, the water in the water inlet pipe flows, the pressure is reduced and reaches another stable pressure value, and the pressure changes regularly at the moment, namely the corresponding frequency value is increased to a stable frequency value, because the water flow in the water inlet pipe continuously impacts the surface of the pressure sensor 10. Therefore, under the two normal states of the water heater, the pressure value and the frequency value are synchronously changed, namely, the pressure value and the frequency value are changed from the corresponding stable value when the water heater is not used to the corresponding stable value when the water heater is used, namely, the frequency value is increased along with the synchronous increase when the pressure value is decreased. When the water heater leaks, for example, when the water heater leaks in an unused state, the pressure value of the water heater changes to another stable value, namely, the pressure value changes from one stable value to another corresponding stable value; the frequency value is not changed and is basically the same as that in the case of no leakage, so that the frequency value is always kept at a stable value, and when the water heater leaks, the pressure value is changed, the frequency value is not changed, and the two changes are asynchronous, so that the water leakage can be determined.
Specifically, it is determined through experiments that, in the case where no water leakage occurs, the frequency and the pressure have a stepwise linear relationship, that is, the frequency and the pressure form a function: frequency f (pressure).
It should be noted that, the pressure value and the frequency value are synchronized, and not both of them change in the same trend, but both of them change simultaneously, for example, when the water heater is not used to use, the pressure value is decreased from one stable pressure value to another stable pressure value, and the frequency value is increased from one stable frequency value to another stable frequency value, the magnitude of both of them change in the opposite trend, but the change is simultaneous, if both of them change not simultaneously, it is determined that there is water leakage.
In a preferred embodiment of the present invention, determining a water leak in a water heater comprises:
determining that the water heater leaks under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly drops to exceed the first frequency value, determining that the water heater is burst.
The embodiment is based on the above embodiment and specifically determines two common states of water leakage of the water heater, namely water leakage and pipe explosion.
Specifically, according to experimental tests, when the water heater sends a leak, the pressure value suddenly decreases from the current value to the first pressure value within a very short time, such as 1 second, and the frequency value remains stable, where the stability may be specifically that the frequency is maintained unchanged, or the frequency is maintained to fluctuate within a small range, such as the frequency is maintained to fluctuate by 1% -5% of the reference frequency, and the frequency value is considered to be maintained stable.
When the water heater sends a pipe burst, the pressure value is suddenly reduced to a second pressure value from the current value in a very short time, wherein the second pressure value is smaller than the first pressure value, because the pressure in the water flow discharged during the pipe burst is more, the frequency value is suddenly increased to a preset maximum value, namely the first frequency value, and because the impact of the water flow on the pressure sensor 10 is maximum at the moment, the pressure change is maximum, namely the corresponding frequency value is maximum.
Specifically, according to the actual use state of the water heater, when the water heater is installed at a home of a user, the unused time is more, so when leakage or pipe explosion occurs, the water heater is not used at a relatively high probability, and some water heaters are used at the same time. Thus, according to these two states, the pressure value or the frequency value, respectively, differs from the initial value at which the current value is mutated.
When the water heater is not in use, the pressure value is an initial pressure value, the corresponding frequency is also an initial frequency value, when leakage occurs, the pressure value is suddenly reduced from the initial pressure value to a first pressure value, and the frequency is maintained to be stable at the initial frequency value; when a pipe burst occurs, the pressure value is suddenly reduced from the initial pressure value to a second pressure value smaller than the first pressure value, because the water pressure is basically not existed during the pipe burst, the second pressure value is the standard atmospheric pressure when the values detected by the pressure sensor 10 in the open state are basically the same, and the frequency value is suddenly increased from the initial frequency value to exceed the first frequency value.
Specifically, when determining the initial pressure value, the method includes:
monitoring a pressure value of the water heater in a preset time under an unused state;
and determining an initial pressure value according to the pressure value.
Since the pressure in the water pipes of different user residences actually varies, for example, the water pressure on different floors varies, or the water supply pressure in different cells also varies, the initial pressure value needs to be determined according to the actual situation.
Specifically, after the water heater is installed, when the water heater is not used, the data of the pressure value is monitored within a preset time such as 5 days, the data may be data of upper and lower fluctuation values, and then the data is processed according to the data to determine the initial pressure value, for example, the data with very large fluctuation can be removed and then the data is averaged to obtain the initial pressure value. Therefore, the determined initial pressure value is accurate, and the subsequent water leakage state identification is also accurate.
When the water heater is in a use state, the pressure value is a stable third pressure value, the third pressure value is smaller than the initial pressure value and is larger than the first pressure value, the frequency value is a stable second frequency value, the second frequency value is larger than the initial frequency value and is smaller than the first frequency value, when leakage occurs, the pressure value is suddenly reduced from the third pressure value to the first pressure value, and the frequency is reduced from the second frequency value to the initial frequency value; when the tube explosion happens, the pressure value is suddenly reduced from the third pressure value to a second pressure value smaller than the first pressure value, and the frequency value is suddenly increased from the second frequency value to exceed the first frequency value.
The specific values of the above mentioned pressures and frequencies at the various stages are shown in the following table:
wherein: initial frequency value < second frequency value < first frequency value; and is
Initial pressure value > third pressure value > first pressure value > second pressure value.
Further, based on the first embodiment of the above device, in a fourth embodiment of the device, as shown in fig. 4, the water heater is further provided with a flow sensor in the water inlet pipe, the flow sensor is used for detecting the flow of water, and the processor 20 is further configured to: acquiring a flow value indicating the flow rate of water; and determining that the flow sensor fails when the change in the flow value is not synchronous with the change in the frequency value.
In this embodiment, still further set up the flow sensor who detects the flow of water in the inlet tube to detect the water consumption of water heater, can make things convenient for the water heater to take suitable heating methods according to the inflow in order to realize more quick heating water, also make things convenient for the user to look over the water condition of water heater simultaneously.
While flow sensors are vulnerable to damage during use and currently do not have a reliable way to detect in time, the present embodiment solves this problem by interacting with the pressure sensor 10.
Specifically, experiments show that in the use process, if the water flow is increased, the corresponding frequency is also increased, the change of the water flow and the frequency is synchronous, and if the increasing trend of the water flow is not synchronous with the increasing trend of the frequency, the flow sensor can be confirmed to be in fault. Since the pressure sensor 10 has a long life and is not prone to malfunction relative to the flow sensor, it can be determined whether the flow sensor is out of order by combining the frequency values determined by the pressure sensor 10 when detecting the pressure.
In a preferred embodiment of the present invention, as shown in fig. 4, the apparatus further includes a display for displaying status information and a WIFI module 40 for connecting to a remote server, and after determining that the water heater leaks, the processor 20 is further configured to:
determining the water leakage amount of the water heater according to the frequency value; and outputting corresponding prompt information according to the water leakage amount, and controlling the water heater to stop heating under the condition that the water leakage amount is greater than the preset amount.
In this embodiment, because the frequency value detected by the pressure sensor 10 is relatively sensitive, especially with the MEMS pressure sensor, the instantaneous change of the pressure in the water path can be reflected, and the speed of the change of the pressure is corresponding to the flow rate of the water flow, so the amount of water flowing through the water inlet pipe can be estimated according to the frequency value, that is, the amount of water leakage can be estimated, and corresponding processing can be performed according to the amount of water leakage. If the water leakage is greater than 1 liter/minute, indicating that the water leakage is large, controlling the water heater to stop heating, specifically closing an air valve for the gas water heater to stop the burner, and if the water heater is an electric water heater, closing the heating pipe to prevent risks caused by continuous heating, and simultaneously giving a corresponding prompt, for example, displaying red through an indicator lamp to give a danger prompt, and further if the water heater is connected with a network remote end, giving a remote control APP prompt message to prompt a user of the current water leakage; and if when the volume of leaking water is less than or equal to 1 liter/minute, it is relatively little to explain to leak, can not influence the normal work of water heater this moment, consequently needn't stop heating, and accessible pilot lamp turns yellow and gives the warning suggestion, gives remote control APP's relevant suggestion simultaneously.
The invention also provides a water heater, which comprises a body, and a water inlet pipe and a water outlet pipe which are arranged on the body, wherein the water heater can be a gas water heater or an electric water heater, and the electric water heater is taken as an example and comprises a shell, a liner and a heater, wherein the shell is provided with the water inlet pipe and the water outlet pipe, the liner is arranged in the shell, a water storage cavity is limited in the liner, and the water inlet pipe and the water outlet pipe are respectively communicated with the water storage cavity. The water heater is provided with the device for the water heater, and particularly as shown in fig. 4 to 6, a pressure sensor 10 is arranged inside a water inlet pipe 100 of the electric water heater at a head part outside a shell, wherein the pressure sensor 10 is vertical to a pipeline and is vertical to a water flow direction. Thereby detecting the pressure of the water in the water inlet pipe 100, and the pressure sensor 10 is disposed at a portion between the water inlet valve and the housing. Therefore, the pressure value of the water inlet pipe 100 is detected, the frequency value associated with the pressure value is determined according to the pressure value, and the water leakage state of the water heater is determined according to the variation trend of the pressure value and the frequency value. Compared with the existing water heater for detecting water leakage, the water heater provided by the invention can timely find the fault of the water heater and perform subsequent fault treatment, so that a user can timely perform treatment such as turning off the heating of the water heater or performing maintenance, and the user experience is improved.
Embodiments of the present application also provide a computer program product comprising program instructions that, when executed by a controller, enable the controller to implement the method for a water heater as described in any of the above embodiments.
Embodiments of the present application also provide a storage medium having computer readable instructions stored thereon which, when executed by a controller, enable the controller to perform the method for a water heater as set forth in any of the above embodiments.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program to instruct related hardware, where the program is stored in a storage medium and includes several instructions to enable a (may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, various different embodiments of the present application may be arbitrarily combined with each other, and the embodiments of the present application should be considered as disclosed in the embodiments of the present application as long as the idea of the embodiments of the present application is not violated.
Claims (10)
1. A method for a water heater, wherein a pressure sensor is disposed in a water inlet pipe outside a body of the water heater, the pressure sensor being for detecting a pressure of water, the method comprising:
acquiring a pressure value indicative of a pressure of the water;
determining a frequency value associated with the pressure value from the pressure value;
determining that the water heater leaks water under the condition that the change of the pressure value is not synchronous with the change of the frequency value;
the determining that the water heater leaks comprises:
determining that the water heater is leaked under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or
And under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly rises to exceed a first frequency value, determining that the water heater is a pipe burst.
2. The method of claim 1, wherein the sudden drop in the pressure value to a first pressure value comprises the sudden drop in the pressure value from an initial pressure value when the water heater is not in use to the first pressure value; and
the sudden drop in the pressure value to a second pressure value comprises a sudden drop in the pressure value from the initial pressure value to the second pressure value.
3. The method of claim 2, further comprising:
detecting a pressure value of the water heater in a preset time under an unused state;
and determining the initial pressure value according to the pressure value.
4. The method as claimed in claim 1, wherein the water heater is further provided with a flow sensor in the water inlet pipe, the flow sensor being for detecting the flow of water, the method further comprising:
acquiring a flow value indicating the flow rate of water;
determining that the flow sensor is malfunctioning if the change in the flow value is not synchronous with the change in the frequency value.
5. An apparatus for a water heater, comprising:
a pressure sensor disposed in a water inlet pipe outside a housing of the water heater, configured to detect a pressure of water;
a processor, in communication with the pressure sensor, configured to:
acquiring a pressure value indicative of a pressure of the water;
determining a frequency value associated with the pressure value from the pressure value; and
determining that the water heater leaks water under the condition that the change of the pressure value is not synchronous with the change of the frequency value;
the determining that the water heater leaks comprises:
determining that the water heater is leaked under the condition that the pressure value is suddenly reduced to a first pressure value and the frequency value is kept stable; or
And under the condition that the pressure value suddenly drops to a second pressure value and the frequency value suddenly rises to exceed a first frequency value, determining that the water heater is a pipe burst.
6. The apparatus of claim 5, wherein the sudden drop in pressure value to a first pressure value comprises the sudden drop in pressure value from an initial pressure value when the water heater is not in use to the first pressure value; and
the sudden drop in the pressure value to a second pressure value comprises a sudden drop in the pressure value from the initial pressure value to the second pressure value.
7. The apparatus of claim 6, wherein the processor is further configured to:
detecting a pressure value of the water heater in a preset time under an unused state;
and determining the initial pressure value according to the pressure value.
8. The apparatus of claim 5, further comprising a flow sensor disposed in the inlet conduit, the flow sensor for detecting a flow of water, the processor further configured to:
acquiring a flow value indicating the flow rate of water;
determining that the flow sensor is malfunctioning if the change in the flow value is not synchronous with the change in the frequency value.
9. The device of claim 5, wherein upon determining that the water heater has a water leak, the processor is further configured to:
determining the water leakage amount of the water heater according to the frequency value;
outputting corresponding prompt information according to the water leakage amount, and
and controlling the water heater to stop heating under the condition that the water leakage amount is greater than the preset amount.
10. A water heater comprising a body and a water inlet pipe provided to the body, characterized in that it further comprises a device for a water heater according to any one of claims 5 to 9.
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| CN111076877A (en) * | 2019-12-19 | 2020-04-28 | 雷磊 | Water pipe leakage detecting device of solar water heater |
| CN112128967B (en) * | 2020-09-28 | 2024-09-27 | 广东万家乐燃气具有限公司 | Electric water heater capable of preventing excessive pressure of liner |
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