CN117366880A - Method and device for detecting scale - Google Patents
Method and device for detecting scale Download PDFInfo
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- CN117366880A CN117366880A CN202311386136.6A CN202311386136A CN117366880A CN 117366880 A CN117366880 A CN 117366880A CN 202311386136 A CN202311386136 A CN 202311386136A CN 117366880 A CN117366880 A CN 117366880A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 367
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 155
- 239000003546 flue gas Substances 0.000 claims abstract description 155
- 238000005265 energy consumption Methods 0.000 claims abstract description 104
- 239000007789 gas Substances 0.000 claims abstract description 103
- 239000000779 smoke Substances 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 45
- 239000002737 fuel gas Substances 0.000 claims description 23
- 238000010792 warming Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/104—Inspection; Diagnosis; Trial operation
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention belongs to the field of gas water heaters and discloses a method and a device for detecting scale. The method comprises the following steps: acquiring the current value, the current water flow, the water inlet temperature, the water outlet temperature, the flue gas temperature and the environmental temperature of a current electromagnetic valve of the gas water heater; determining the total input load according to the current solenoid valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored solenoid valve current value and the smoke flow; determining water flow energy consumption according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density; determining the flue gas energy consumption of the flue gas consumption according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas; determining the difference value between the total input load and the water flow energy consumption and the smoke energy consumption as the scale energy consumption; and if the energy loss of the scale is larger than a preset energy loss threshold value of the scale, alarming. The water scale in the gas water heater can be effectively detected by the water scale detection device.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a method and a device for detecting scale.
Background
At present, after the gas water heater runs for a long time, scale deposition in the heat exchange tube of the gas water heater is serious, and more scale is easy to block the heat exchange tube of the gas water heater, so that the heat exchange effect of the gas water heater is seriously affected. Meanwhile, in the heating process of the gas water heater, scale absorbs heat, heat of the heat exchanger is accumulated, and the problem of local high-temperature overheating of the heat exchange tube is caused, so that the heat exchange tube is deformed or burnt through to leak water. Therefore, there is a need for an effective method for detecting scale in gas water heaters.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for detecting scale.
In a first aspect, there is provided a method of detecting scale, the method comprising:
after receiving a scale detection instruction of a user, acquiring a current solenoid valve current value, a current water flow, a water inlet water temperature, a water outlet water temperature, a flue gas temperature and an environment temperature of the gas water heater;
determining the total input load according to the current solenoid valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored solenoid valve current value and the smoke flow;
determining water flow energy consumption of the water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density;
determining flue gas energy consumption of flue gas consumption generated by combusting fuel gas in the fuel gas water heater in a heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas;
determining the difference value between the total input load and the water flow energy consumption and the smoke energy consumption as scale energy consumption;
and if the energy loss of the scale is larger than a preset energy loss threshold value of the scale, alarming.
As an optional implementation manner, the formula for determining water flow energy consumption of water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density is as follows:
q1＝c1*ρ1*V1*(t effluent water -t Inflow of water )
Wherein q1 represents water flow energy consumption, c1 represents specific heat capacity of water, ρ1 represents density of water, V1 represents current water flow, t Effluent water Shows the water temperature, t Inflow of water Representing the temperature of the incoming water.
As an optional implementation manner, the formula for determining the flue gas energy consumption of the flue gas consumption generated by combusting fuel gas in the fuel gas water heater in the heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas is:
q2＝c2*ρ2*V2*(t flue gas -t Environment (environment) )
Wherein q2 represents flue gas energy consumption, c2 represents specific heat capacity of flue gas, ρ2 represents density of flue gas, V2 represents current flue gas flow, t Flue gas Indicating the temperature of the flue gas, t Environment (environment) Indicating the ambient temperature.
As an alternative embodiment, the preset scale energy loss threshold is a product value of a preset scaling factor and the current total input load.
As an alternative embodiment, the method further comprises:
if the energy loss of the scale is smaller than or equal to the preset energy loss threshold of the scale, a prompt message is output, wherein the prompt message is a message for prompting a user that the condition of the gas water heater is good and the scale is not needed to be removed.
In a second aspect, there is provided a scale detection apparatus, the apparatus comprising:
the acquisition module is used for acquiring the current electromagnetic valve current value, the current water flow, the water inlet water temperature, the water outlet water temperature, the flue gas temperature and the environment temperature of the gas water heater after receiving the scale detection instruction of the user;
the first determining module is used for determining the total input load according to the current electromagnetic valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored electromagnetic valve current value and the smoke flow;
the second determining module is used for determining water flow energy consumption of water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density;
the third determining module is used for determining the flue gas energy consumption of the flue gas consumption generated by combusting fuel gas in the fuel gas water heater in the heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas;
a fourth determining module, configured to determine a difference between the total input load and the water flow energy consumption and the flue gas energy consumption as a scale energy consumption;
and the alarm module is used for alarming if the energy loss of the scale is larger than a preset energy loss threshold value of the scale.
As an alternative embodiment, the preset scale energy loss threshold is a product value of a preset scaling factor and the current total input load.
As an alternative embodiment, the apparatus further comprises:
if the energy loss of the scale is smaller than or equal to the preset energy loss threshold of the scale, a prompt message is output, wherein the prompt message is a message for prompting a user that the condition of the gas water heater is good and the scale is not needed to be removed.
In a third aspect, there is provided a gas water heater comprising: a controller, a water flow sensor, a flue gas temperature sensor, an ambient temperature sensor, a water inlet temperature sensor, a water outlet temperature sensor and a solenoid valve, and a scale detection device according to the second aspect, wherein the controller is respectively connected with the water flow sensor, the flue gas temperature sensor, the ambient temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor and the solenoid valve;
the controller controls the water flow sensor, the flue gas temperature sensor, the ambient temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor and the electromagnetic valve, and the scale detection device according to the second aspect, so as to realize the scale detection method according to the first aspect.
The application provides a method and a device for detecting scale, and the technical scheme provided by the embodiment of the application at least brings the following beneficial effects: after receiving a scale detection instruction of a user, acquiring the current water flow, water inlet water temperature, water outlet water temperature, flue gas temperature and environmental temperature of the gas water heater; determining water flow energy consumption of the water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density; determining flue gas energy consumption of flue gas consumption generated by combusting fuel gas in the fuel gas water heater in a heating process according to the flue gas temperature, the ambient temperature, the pre-stored flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas; determining a difference value between a prestored total input load and the water flow energy consumption and the smoke energy consumption as scale energy consumption; and if the energy loss of the scale is larger than a preset energy loss threshold value of the scale, alarming. In the heating process of the gas water heater, if no scale exists in the gas water heater, the total input load is used for heating water to consume heat and generating energy consumed by flue gas through gas combustion. If the gas water heater has scale, the total input load is used for the energy consumed by water heating, the heat consumed by flue gas generated by gas combustion and the energy consumed by the scale. Based on the above, the current total input load, water flow energy consumption and smoke energy consumption are determined, and the difference between the current total input load, water flow energy consumption and smoke energy consumption is determined, wherein the difference is the scale energy consumption, namely the energy absorbed by the scale. If the energy loss of the scale is larger than the preset energy loss threshold value of the scale, the alarm is given to prompt a user that the scale exists in the gas water heater, and the scale removing operation can be performed. Therefore, the scale in the gas water heater can be effectively detected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a method for detecting scale according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a scale detecting device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The scale detection method provided by the embodiment of the application can be applied to a gas water heater. As shown in fig. 1, the gas water heater includes a controller 101, a water flow sensor 102, a flue gas temperature sensor 103, an ambient temperature sensor 104, a water inlet temperature sensor 105, a water outlet temperature sensor 106, and a solenoid valve 107. The controller 101 is connected to a water flow rate sensor 102, a smoke temperature sensor 103, an ambient temperature sensor 104, a water inlet temperature sensor 105, a water outlet temperature sensor 106, and a solenoid valve 107, respectively.
And the controller 101 is configured to obtain a current solenoid valve current value, a current water flow, a water inlet water temperature, a water outlet water temperature, a flue gas temperature and an environmental temperature of the gas water heater after receiving a scale detection instruction of a user. And determining the total input load according to the current solenoid valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored solenoid valve current value and the smoke flow. And determining the water flow energy consumption of water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density. And determining the flue gas energy consumption of the flue gas consumption generated by burning the fuel gas in the fuel gas water heater in the heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas. And determining the difference value between the total input load and the water flow energy consumption and the smoke energy consumption as the scale energy consumption. And if the energy loss of the scale is larger than a preset energy loss threshold value of the scale, alarming.
The water flow sensor 102 is configured to detect a current water flow entering the gas water heater, and send the detected current water flow to the controller 101.
The flue gas temperature sensor 103 is configured to detect a temperature of flue gas generated after combustion of the fuel gas, and send the detected flue gas temperature to the controller 101. The flue gas temperature sensor is arranged at an air outlet of a fan in the gas water heater.
An ambient temperature sensor 104 for detecting the temperature of the environment and transmitting the detected ambient temperature to the controller 101.
The inlet water temperature sensor 105 is used for detecting the inlet water temperature of water entering the gas water heater and sending the detected inlet water temperature to the controller 101.
The outlet water temperature sensor 106 is configured to detect an outlet water temperature of water flowing out of the gas water heater, and send the detected outlet water temperature to the controller 101.
The electromagnetic valve 107 is configured to receive a current command from the controller 101, and control the opening of the proportional valve according to the current command, so as to control the gas flow of the gas entering the combustion chamber for combustion, thereby ensuring that the gas water heater operates at a fixed total input load.
The following will describe a scale detection method provided in the embodiment of the present application in detail with reference to a specific embodiment, and fig. 2 is a flowchart of a scale detection method provided in the embodiment of the present application, and as shown in fig. 2, specific steps are as follows:
step 201, after receiving a scale detection instruction of a user, acquiring a current solenoid valve current value, a current water flow, a water inlet water temperature, a water outlet water temperature, a flue gas temperature and an environmental temperature of the gas water heater.
In practice, after the gas water heater is operated for a long time, scale deposition in the heat exchange tube of the gas water heater is serious. When the scale is more, the heat exchange effect of the gas water heater can be affected. The scale absorbs heat, so that the heat exchange tube is overheated at high temperature, and the heat exchange tube is deformed or burnt out to leak water. Therefore, it is necessary to periodically or in real time detect the presence or absence of scale in the gas water heater. According to the characteristic of heat absorption of the scale, whether the scale exists in the gas water heater can be effectively detected by judging whether the total output energy comprises the energy absorbed by the scale. That is, when there is no scale in the gas water heater, the total input load generated by the gas combustion includes the energy consumed for water temperature increase (water flow energy consumption) and the energy consumed by the gas combustion to generate smoke (smoke energy consumption). When scale exists in the gas water heater, the total input load comprises energy (water scale energy consumption) for absorbing the scale in addition to energy (water flow energy consumption) for heating water and energy (flue gas energy consumption) for consuming flue gas generated by combustion of the gas. Based on this, it is possible to determine whether scale is present in the gas water heater by determining the total input load, water flow rate energy consumption and smoke energy consumption generated by the gas combustion of the gas water heater and then comparing them. Therefore, the scale detection instruction of a user can be received, the opening of the proportional valve is controlled to be fixed by outputting a fixed electromagnetic valve current value, and the incoming gas flow is ensured to be fixed, so that the total input load is a fixed value. The scale detection instruction input by the user can be in the form of a function key triggered by the user. For example, a user triggers a scale detection function key, the gas water heater receives a scale detection instruction of the user, and the current electromagnetic valve current value, the current water flow, the water inlet water temperature, the water outlet water temperature, the flue gas temperature and the environment temperature of the gas water heater are obtained. The subsequent steps determine the total input load, water flow energy consumption and flue gas energy consumption based on the parameters.
Step 202, determining the total input load according to the current solenoid valve current value, and inquiring the current flue gas flow in the corresponding relation between the pre-stored solenoid valve current value and the flue gas flow.
In practice, the total input load of the gas water heater is provided by the combustion gas of the gas water heater, so that the total input load of the gas water heater can be determined according to the gas flow of the combustion gas. The opening of the proportional valve is controlled by adjusting the current value of the electromagnetic valve, so that the gas flow entering the combustion chamber for combustion is ensured. The technical staff performs experiments in advance, and determines the total input load of each corresponding gas water heater according to the current value of each electromagnetic valve of the electromagnetic valve. Therefore, the total input load can be determined according to the solenoid valve current value of the gas water heater. The flue gas flow is the flow of the flue gas generated when the gas water heater burns the gas. The flue gas flow is related to the burnt gas flow, the burnt gas flow is different, and the consumed flue gas energy consumption is different, so the flue gas energy consumption consumed by the gas combustion is determined, and the flue gas flow needs to be determined first. Therefore, a technician collects the corresponding generated smoke flow according to the current values of the electromagnetic valves in advance, and determines the corresponding relation between the current values of the electromagnetic valves and the smoke flow. The gas water heater stores the corresponding relation between the current value of the electromagnetic valve and the smoke flow. Based on the corresponding relation, inquiring the current smoke flow corresponding to the current electromagnetic valve current value.
Step 203, determining water flow energy consumption for heating and consuming the water flow in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density.
In the implementation, the water flow energy consumption is the current water flow in the gas water heater in the heating process of the gas water heater, and the energy absorbed in the process of increasing the water inlet temperature to the water outlet temperature. Therefore, the water flow energy consumption is related to the current water flow, the water inlet temperature, the water outlet temperature, the specific heat capacity of water, the density of water and other parameters. Therefore, the water flow energy consumption for heating and consuming the water flow in the heating process can be determined according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density.
As an alternative embodiment, the formula for determining the water flow rate energy consumption for heating the water flow rate in the heating process according to the current water flow rate, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density is as follows:
q1＝c1*ρ1*V1*(t effluent water -t Inflow of water )
Wherein q1 represents water flow energy consumption, c1 represents specific heat capacity of water, ρ1 represents density of water, V1 represents current water flow, t Effluent water Shows the water temperature, t Inflow of water Representing the temperature of the incoming water.
Step 204, determining the flue gas energy consumption of the flue gas consumption generated by combusting the fuel gas in the fuel gas water heater in the heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas.
In practice, the flue gas energy consumption is the energy absorbed by the gas water heater during the heating process when the flue gas flow is generated by the gas burning the current gas flow in the gas water heater. Therefore, the flue gas energy consumption is related to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas. Therefore, the flue gas energy consumption of the flue gas consumption generated by combusting the fuel gas in the fuel gas water heater in the heating process can be determined according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas.
As an alternative embodiment, the formula for determining the flue gas energy consumption of the flue gas consumption generated by combusting fuel gas in the gas water heater during heating according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas is as follows:
q2＝c2*ρ2*V2*(t flue gas -t Environment (environment) )
Wherein q2 represents flue gas energy consumption, c2 represents specific heat capacity of flue gas, ρ2 represents density of flue gas, V2 represents current flue gas flow, t Flue gas Indicating the temperature of the flue gas, t Environment (environment) Indicating the ambient temperature.
Step 205, determining the difference between the current total input load and the water flow energy consumption and the smoke energy consumption as the scale energy consumption.
In practice, when there is no scale in the gas water heater, the current total input load includes water flow energy consumption for water heating consumption and flue gas energy consumption for flue gas consumption resulting from gas combustion. I.e. q=q1+q2, Q represents the current total input load, Q1 represents the water flow energy consumption, Q2 represents the flue gas energy consumption. When the water scale exists in the gas water heater, the total input load comprises the water scale energy consumption for absorbing the water scale besides the water flow energy consumption for water heating consumption and the smoke energy consumption for smoke consumption generated by gas combustion. I.e. q=q1+q2+q3, Q represents the current total input load, Q1 represents water flow energy consumption, Q2 represents flue gas energy consumption, Q3 represents scale energy consumption. Based on this, the current total input load and the water flow energy consumption, the flue gas energy consumption can be made different, and the difference between the current total input load and the water flow energy consumption, the flue gas energy consumption can be determined as the scale energy consumption.
And 206, alarming if the energy loss of the scale is larger than a preset energy loss threshold value of the scale.
In implementation, after the energy loss of the scale is determined, the energy loss of the scale is compared with a preset energy loss threshold value of the scale, if the energy loss of the scale is larger than the preset energy loss threshold value of the scale, the scale in the current gas water heater is indicated to be more, and then an alarm is given for prompting and warning a user that the scale is needed to be removed, so that the service life and the heat exchange efficiency of the heat exchanger in the gas water heater are improved.
As an alternative embodiment, the preset scale energy loss threshold is a product of a preset scaling factor and the current total input load. The preset proportion coefficient can be ten percent, namely when the energy loss ratio of the scale is 10 percent higher than the current total input load, the gas water heater gives an alarm to prompt a user to perform scale removal operation.
Further, if the energy loss of the scale is smaller than or equal to a preset energy loss threshold of the scale, a prompt message is output, wherein the prompt message is the message for prompting the user that the condition of the gas water heater is good and the scale removal is not needed.
In the implementation, the energy loss of the scale is compared with a preset energy loss threshold value of the scale, if the energy loss of the scale is smaller than or equal to the preset energy loss threshold value of the scale, the scale in the current gas water heater is smaller or no scale is indicated, prompt information is output, and the prompt information is information for prompting a user that the condition of the gas water heater is good and no scale removal is needed.
The embodiment of the application provides a scale detection method, in the heating process of a gas water heater, if no scale exists in the gas water heater, the total input load is used for heating water to consume heat and burning gas to produce energy consumed by flue gas. If the gas water heater has scale, the total input load is used for the energy consumed by water heating, the heat consumed by flue gas generated by gas combustion and the energy consumed by the scale. Based on the above, the current total input load, water flow energy consumption and smoke energy consumption are determined, and the difference between the current total input load, water flow energy consumption and smoke energy consumption is determined, wherein the difference is the scale energy consumption, namely the energy absorbed by the scale. If the energy loss of the scale is larger than the preset energy loss threshold value of the scale, the alarm is given to prompt a user that the scale exists in the gas water heater, and the scale removing operation can be performed. Therefore, the scale in the gas water heater can be effectively detected.
It should be understood that, although the steps in the flowchart of fig. 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in fig. 2 may include a plurality of steps or stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily sequential, but may be performed in rotation or alternatively with at least a portion of the steps or stages in other steps or other steps.
It should be understood that the same/similar parts of the embodiments of the method described above in this specification may be referred to each other, and each embodiment focuses on differences from other embodiments, and references to descriptions of other method embodiments are only needed.
The embodiment of the application also provides a scale detection device, as shown in fig. 3, the device includes:
the acquisition module 301 is configured to acquire a current solenoid valve current value, a current water flow, a water inlet water temperature, a water outlet water temperature, a flue gas temperature and an environmental temperature of the gas water heater after receiving a scale detection instruction of a user;
a first determining module 302, configured to determine a total input load according to the current solenoid valve current value, and query a current flue gas flow in a pre-stored correspondence between a solenoid valve current value and a flue gas flow;
a second determining module 303, configured to determine water flow energy consumption of the water flow heating consumption in a heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density;
a third determining module 304, configured to determine, according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas, and the density of the flue gas, flue gas energy consumption of flue gas consumption generated by combusting fuel gas in the gas water heater during a heating process;
a fourth determining module 305, configured to determine a difference between the total input load and the water flow energy consumption and the flue gas energy consumption as a scale energy consumption;
and the alarm module 306 is used for alarming if the energy loss of the scale is larger than a preset energy loss threshold value of the scale.
As an alternative embodiment, the preset scale energy loss threshold is a product value of a preset scaling factor and the current total input load.
As an alternative embodiment, the apparatus further comprises:
and the output module is used for outputting prompt information if the energy loss of the scale is smaller than or equal to the preset energy loss threshold value of the scale, wherein the prompt information is information for prompting a user that the condition of the gas water heater is good and the scale is not needed to be removed.
The embodiment of the application provides a scale detection device, in the in-process that gas heater heated, if there is no scale in the gas heater, then total input load is used for the heat that the water intensification consumed and the energy that gas combustion produced the flue gas consumption. If the gas water heater has scale, the total input load is used for the energy consumed by water heating, the heat consumed by flue gas generated by gas combustion and the energy consumed by the scale. Based on the above, the current total input load, water flow energy consumption and smoke energy consumption are determined, and the difference between the current total input load, water flow energy consumption and smoke energy consumption is determined, wherein the difference is the scale energy consumption, namely the energy absorbed by the scale. If the energy loss of the scale is larger than the preset energy loss threshold value of the scale, the alarm is given to prompt a user that the scale exists in the gas water heater, and the scale removing operation can be performed. Therefore, the scale in the gas water heater can be effectively detected.
For specific limitations of the scale detection device, reference may be made to the above limitations of the scale detection method, and no further description is given here. The various modules in the scale detection apparatus described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that, user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for presentation, analyzed data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (9)
1. A method for detecting scale, the method comprising:
after receiving a scale detection instruction of a user, acquiring a current solenoid valve current value, a current water flow, a water inlet water temperature, a water outlet water temperature, a flue gas temperature and an environment temperature of the gas water heater;
determining the total input load according to the current solenoid valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored solenoid valve current value and the smoke flow;
determining water flow energy consumption of the water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density;
determining flue gas energy consumption of flue gas consumption generated by combusting fuel gas in the fuel gas water heater in a heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas;
determining the difference value between the total input load and the water flow energy consumption and the smoke energy consumption as scale energy consumption;
and if the energy loss of the scale is larger than a preset energy loss threshold value of the scale, alarming.
2. The method of claim 1, wherein the formula for determining the water flow rate energy consumption for the water flow rate warming up consumption during heating according to the current water flow rate, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density is:
q1＝c1*ρ1*V1*(t effluent water -t Inflow of water )
Wherein q1 represents water flow energy consumption, c1 represents specific heat capacity of water, ρ1 represents density of water, V1 represents current water flow, t Effluent water Shows the water temperature, t Inflow of water Representing the temperature of the incoming water.
3. The method of claim 1, wherein the formula for determining the flue gas energy consumption of the flue gas consumption generated by combusting the fuel gas in the fuel gas water heater during the heating process based on the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas, and the density of the flue gas is:
q2＝c2*ρ2*V2*(t flue gas -t Environment (environment) )
Wherein q2 represents flue gas energy consumption, c2 represents specific heat capacity of flue gas, ρ2 represents density of flue gas, V2 represents current flue gas flow, t Flue gas Indicating the temperature of the flue gas, t Environment (environment) Indicating the ambient temperature.
4. The method of claim 1, wherein the preset scale energy loss threshold is a product of a preset scaling factor and the current total input load.
5. The method according to claim 1, wherein the method further comprises:
if the energy loss of the scale is smaller than or equal to the preset energy loss threshold of the scale, a prompt message is output, wherein the prompt message is a message for prompting a user that the condition of the gas water heater is good and the scale is not needed to be removed.
6. A scale detection apparatus, the apparatus comprising:
the acquisition module is used for acquiring the current electromagnetic valve current value, the current water flow, the water inlet water temperature, the water outlet water temperature, the flue gas temperature and the environment temperature of the gas water heater after receiving the scale detection instruction of the user;
the first determining module is used for determining the total input load according to the current electromagnetic valve current value, and inquiring the current smoke flow in the corresponding relation between the pre-stored electromagnetic valve current value and the smoke flow;
the second determining module is used for determining water flow energy consumption of water flow heating consumption in the heating process according to the current water flow, the water inlet water temperature, the water outlet water temperature, the specific heat capacity of water and the water density;
the third determining module is used for determining the flue gas energy consumption of the flue gas consumption generated by combusting fuel gas in the fuel gas water heater in the heating process according to the flue gas temperature, the ambient temperature, the current flue gas flow, the specific heat capacity of the flue gas and the density of the flue gas;
a fourth determining module, configured to determine a difference between the total input load and the water flow energy consumption and the flue gas energy consumption as a scale energy consumption;
and the alarm module is used for alarming if the energy loss of the scale is larger than a preset energy loss threshold value of the scale.
7. The apparatus of claim 6, wherein the predetermined scale energy loss threshold is a product of a predetermined scaling factor and the current total input load.
8. The apparatus of claim 6, wherein the apparatus further comprises:
if the energy loss of the scale is smaller than or equal to the preset energy loss threshold of the scale, a prompt message is output, wherein the prompt message is a message for prompting a user that the condition of the gas water heater is good and the scale is not needed to be removed.
9. The gas water heater is characterized by comprising a controller, a water flow sensor, a flue gas temperature sensor, an environment temperature sensor, a water inlet temperature sensor, a water outlet temperature sensor and an electromagnetic valve, wherein the controller is respectively connected with the water flow sensor, the flue gas temperature sensor, the environment temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor and the electromagnetic valve;
the controller controls the water flow sensor, the flue gas temperature sensor, the ambient temperature sensor, the inlet water temperature sensor, the outlet water temperature sensor and the solenoid valve to implement the scale detection method according to any one of claims 1 to 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118067783A (en) * | 2024-04-22 | 2024-05-24 | 致沿科技(南京)有限公司 | Method and device for detecting scaling of liquid heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118067783A (en) * | 2024-04-22 | 2024-05-24 | 致沿科技(南京)有限公司 | Method and device for detecting scaling of liquid heater |
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