CN113607452B - Method and device for detecting reverse connection of water inlet pipe and water outlet pipe - Google Patents
Method and device for detecting reverse connection of water inlet pipe and water outlet pipe Download PDFInfo
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- CN113607452B CN113607452B CN202110885601.5A CN202110885601A CN113607452B CN 113607452 B CN113607452 B CN 113607452B CN 202110885601 A CN202110885601 A CN 202110885601A CN 113607452 B CN113607452 B CN 113607452B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 870
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002441 reversible effect Effects 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000004590 computer program Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Abstract
The application relates to a method and a device for detecting water inlet and outlet pipe reverse connection. The method is applied to a gas water heater, and comprises the following steps: when water flow is detected, detecting first water temperature data, and when the opening of the proportional valve reaches the target opening of the proportional valve, detecting second water temperature data; if the first water temperature data and the second water temperature data meet a preset first water temperature condition, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting third water temperature data; and if the second water temperature data and the third water temperature data meet the preset second water temperature condition, judging that the water inlet and outlet pipes of the gas water heater are connected reversely, and stopping heating. By adopting the water inlet and outlet pipe reverse connection detection device, whether the water inlet and outlet pipe is reversely connected or not can be detected.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for detecting water inlet and outlet pipe reverse connection.
Background
At present, the specifications of a water inlet pipe and a water outlet pipe of the gas water heater are the same, and when the identification of the water inlet pipe and the water outlet pipe is not clear, the situation that the water inlet pipe and the water outlet pipe are connected reversely easily occurs to a user. Because the gas water heater uses PID (Proportional Integral Derivative ) control algorithm to control the water temperature. Therefore, when the water inlet pipe and the water outlet pipe are connected reversely, the water inlet water temperature sensor becomes the water outlet water temperature sensor. At this time, the water temperature of the outlet water detected by the gas water heater is always at a lower water temperature and is kept unchanged. Based on PID algorithm, the gas water heater continuously increases the thermal load until the maximum thermal load, so that the water temperature of the water is higher, and the user is scalded.
Disclosure of Invention
Accordingly, it is necessary to provide a method and a device for detecting the reverse connection of water inlet and outlet pipes.
In a first aspect, a method for detecting water inlet and outlet pipe reverse connection is provided, the method is applied to a gas water heater, and the method comprises the following steps:
when water flow is detected, detecting first water temperature data, and when the opening of the proportional valve reaches the target opening of the proportional valve, detecting second water temperature data;
if the first water temperature data and the second water temperature data meet a preset first water temperature condition, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting third water temperature data;
and if the second water temperature data and the third water temperature data meet the preset second water temperature condition, judging that the water inlet and outlet pipes of the gas water heater are connected reversely, and stopping heating.
As an alternative embodiment, the first water temperature data includes a first water outlet temperature, the second water temperature data includes a second water outlet temperature, and if the first water temperature data and the second water temperature data meet a preset first water temperature condition, adjusting the proportional valve opening from the target proportional valve opening to a minimum proportional valve opening, and detecting third water temperature data includes:
and if the water temperature difference value between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data.
As an optional implementation manner, the first water temperature data further includes a first water inlet temperature, the second water temperature data further includes a second water inlet temperature, and if the first water temperature data and the second water temperature data meet a preset first water temperature condition, the proportional valve opening is adjusted from the target proportional valve opening to a minimum proportional valve opening, and the detecting of third water temperature data includes:
if the water temperature difference value of the water inlet water temperature difference value and the water outlet water temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data; the water temperature difference value of the inlet water is a water temperature difference value of the second inlet water temperature and the first inlet water temperature, and the water temperature difference value of the outlet water is a water temperature difference value of the second outlet water temperature and the first outlet water temperature.
As an optional implementation manner, the third water temperature data includes a third water outlet temperature, and if the second water temperature data and the third water temperature data meet a preset second water temperature condition, it is determined that the water inlet and outlet pipes of the gas water heater are connected reversely, and heating is stopped, including:
if the water temperature difference value between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
As an optional implementation manner, the third water temperature data includes a third water inlet temperature, and if the second water temperature data and the third water temperature data meet a preset second water temperature condition, it is determined that the water inlet and outlet of the gas water heater are connected reversely, and heating is stopped, including:
if the water temperature difference value between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
In a second aspect, a device for detecting water inlet and outlet pipe connection, the device being applied to a gas water heater, the device comprising:
the first detection module is used for detecting first water temperature data when water flow is detected, and detecting second water temperature data when the opening of the proportional valve reaches the target opening of the proportional valve;
the second detection module is used for adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve and detecting third water temperature data if the first water temperature data and the second water temperature data meet a preset first water temperature condition;
and the control module is used for judging that the water inlet and outlet pipes of the gas water heater are connected reversely and stopping heating if the second water temperature data and the third water temperature data meet the preset second water temperature condition.
As an optional implementation manner, the first water temperature data includes a first water outlet temperature, the second water temperature data includes a second water outlet temperature, and the second detection module is specifically configured to:
and if the water temperature difference value between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data.
As an optional implementation manner, the first water temperature data further includes a first water inlet temperature, the second water temperature data further includes a second water inlet temperature, and the second detection module is specifically configured to:
if the water temperature difference value of the water inlet water temperature difference value and the water outlet water temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data; the water temperature difference value of the inlet water is a water temperature difference value of the second inlet water temperature and the first inlet water temperature, and the water temperature difference value of the outlet water is a water temperature difference value of the second outlet water temperature and the first outlet water temperature.
As an optional implementation manner, the third water temperature data includes a third water outlet temperature, and the control module is specifically configured to:
if the water temperature difference value between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
As an alternative embodiment, the third water temperature data includes a third water inlet temperature, and the control module is specifically configured to:
if the water temperature difference value between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
In a third aspect, a computer device is provided, comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor implementing the method steps according to the first aspect when the computer program is executed.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the method steps according to the first aspect.
The application provides a method and a device for detecting water inlet and outlet pipe reverse connection. The method is applied to a gas water heater, when the gas water heater detects water flow, first water temperature data are detected, and when the opening of the proportional valve reaches the target opening of the proportional valve, second water temperature data are detected. If the first water temperature data and the second water temperature data meet a preset first water temperature condition, the gas water heater adjusts the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detects third water temperature data; if the second water temperature data and the third water temperature data meet the preset second water temperature condition, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and heating is stopped. Therefore, when the gas water heater detects that the water inlet pipe and the water outlet pipe are connected reversely, the heating is stopped, and the user is prevented from being scalded due to the higher water outlet temperature.
Drawings
Fig. 1 is a flowchart of a method for detecting water inlet and outlet pipe connection reversal according to an embodiment of the present application;
fig. 2 is a flowchart of an example one of a method for detecting a water inlet and outlet pipe connection reversal according to an embodiment of the present application;
fig. 3 is a flowchart of an example two of a method for detecting water inlet and outlet pipe connection reversal according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a detection device for water inlet and outlet pipe reverse connection provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a computer 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 embodiment of the application provides a method for detecting the reverse connection of water inlet and outlet pipes, which can be applied to a gas water heater. The gas water heater can be divided into a gas water heater without a water inlet temperature sensor and a gas water heater with a water inlet temperature sensor. The gas water heater without the inlet water temperature sensor and the gas water heater with the inlet water temperature sensor both comprise an outlet water temperature sensor and a water flow sensor.
Hot water heating heat of gas water heater = gas combustion heat-heat dissipation heat, "gas combustion heat-heat dissipation heat" and proportional valve aperture B Proportion of And in direct proportion. Meanwhile, the formula of the heating heat of the hot water is E=CM delta T, E and Q Flow rate X Δt "is proportional. Wherein E represents the heating quantity of hot water, C represents the specific heat capacity coefficient of water, M represents the mass of water, deltaT represents the heating temperature, Q Flow rate Represents the water intake, Δt=t Target object -T Inflow of water ，T Target object Represents the target water temperature T Inflow of water Representing the temperature of the incoming water. Based on the above analysis, "Q Flow rate X DeltaT and B Proportion of "in direct proportion". For PID control algorithm, Q Flow rate 、T Target object And T Inflow of water To a known amount, B can be determined based on the above-mentioned proportional relationship Proportion of . Subsequently, by controlling the deviation err=t Out of -T Target object PID operation is carried out, and B is continuously adjusted Proportion of Thereby gradually approaching Err to 0 and then T Out of Equal to T Target object . Wherein T is Out of The water temperature is shown.
And under the condition that water inlet and outlet pipes of the gas water heater are not reversely connected, after the gas water heater detects water flow (the water flow is more than or equal to 2.5L/min), the gas water heater adjusts the opening of the proportional valve through a PID control algorithm, so that the water temperature is gradually close to the target water outlet temperature. After that, the fire load of the gas water heater is stable, and the water outlet temperature is basically kept unchanged. And for the situation that the water inlet pipe and the water outlet pipe of the gas water heater are reversely connected, the water outlet temperature sensor of the gas water heater is actually changed into a water inlet temperature sensor. Because the temperature of the water entering is low and basically kept unchanged. Therefore, the water temperature of the outlet water detected by the gas water heater is also low and basically kept unchanged. Based on a PID control algorithm, the control deviation is always at a constant value, the gas water heater continuously increases the opening of the proportional valve to the maximum opening of the proportional valve, and the thermal load is also continuously increased to the maximum thermal load, so that the actual water outlet temperature is far higher than the target water outlet temperature, and further the user is scalded.
The following will describe a method for detecting the reverse connection of a water inlet and outlet pipe according to the embodiment of the present application in detail with reference to the specific embodiment, as shown in fig. 1, and the specific steps are as follows:
step 101, when water flow is detected, first water temperature data are detected, and when the opening degree of the proportional valve reaches the target opening degree of the proportional valve, second water temperature data are detected.
In practice, the gas water heater may detect the first water temperature data when the gas water heater detects water flow (i.e., a user uses hot water) through the water flow sensor. Then, the gas water heater may detect the second water temperature data when the proportional valve opening reaches the target proportional valve opening. In the case of cold winter, the water temperature of the inlet water is far lower than the target water temperature of the outlet water, so that the target proportional valve opening can be the proportional valve opening corresponding to the target water temperature of the outlet water. And under the condition of hot summer, the water temperature of the inlet water is relatively close to the water temperature of the target outlet water, and misjudgment can be caused by using the opening of the proportional valve corresponding to the water temperature of the target outlet water as the opening of the target proportional valve. Therefore, the proportional valve opening corresponding to the early-warning water temperature higher than the target water temperature by a certain temperature (for example, 10 degrees) can be used as the target proportional valve opening.
Step 102, if the first water temperature data and the second water temperature data meet the preset first water temperature condition, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting the third water temperature data.
In implementation, after the gas water heater detects the first water temperature data and the second water temperature data, whether the first water temperature data and the second water temperature data meet a preset first water temperature condition can be judged. If the first water temperature data and the second water temperature data meet the preset first water temperature condition, the gas water heater adjusts the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and the outlet water temperature sensor detects the third water temperature data. If the first water temperature data and the second water temperature data do not meet the preset first water temperature condition, ending the flow.
Alternatively, since the gas water heater without the inflow temperature sensor includes only the outflow temperature sensor, the gas water heater with the inflow temperature sensor includes the outflow temperature sensor and the inflow temperature sensor. Therefore, the first water temperature data and the second water temperature data detected by the two types of gas water heaters are different, and then the two types of gas water heaters judge whether the first water temperature data and the second water temperature data meet the preset first water temperature condition or not, and the specific steps are as follows:
in case one, for a gas water heater without an inlet water temperature sensor: the gas water heater of this type only includes a water outlet temperature sensor, and the first water temperature data only includes a first water outlet temperature, and the second water temperature data only includes a second water outlet temperature. Therefore, if the water temperature difference between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference threshold value, the proportional valve opening is adjusted from the target proportional valve opening to the minimum proportional valve opening, and third water temperature data is detected.
In the implementation, when the water inlet pipe and the water outlet pipe of the gas water heater are not connected reversely, the water outlet temperature is increased along with the increase of the opening of the proportional valve. Therefore, the water temperature difference between the second water outlet water temperature and the first water outlet water temperature is larger. And under the condition that water inlet and outlet pipes of the gas water heater are reversely connected, the water temperature of the second water outlet and the water temperature of the first water outlet are both the water temperature of the water inlet. Because the water temperature of the inlet water basically keeps unchanged, the water temperature of the second outlet water is close to the water temperature of the first outlet water, namely the water temperature difference between the water temperature of the second outlet water and the water temperature of the first outlet water is smaller. Based on the above, if the water temperature difference between the second water outlet water temperature and the first water outlet water temperature is smaller than or equal to the preset first water temperature difference threshold value, the preliminary judgment that the water inlet and outlet pipes are possibly connected reversely is performed. At this time, the gas water heater may further adjust the proportional valve opening from the target proportional valve opening to the minimum proportional valve opening, and detect the third water temperature data. The first water temperature difference threshold may be set by a technician according to experience, which is not limited in the embodiments of the present application. Preferably, the first water temperature difference threshold may be set to be small (e.g., 2 degrees) since the incoming water temperature remains substantially unchanged.
In the second case, for the gas water heater with the inlet water temperature sensor: the gas water heater comprises a water outlet temperature sensor and a water inlet temperature sensor, wherein the first water temperature data comprise a first water outlet temperature and a first water inlet temperature, and the second water temperature data comprise a second water outlet temperature and a second water inlet temperature. Therefore, if the water temperature difference value of the water inlet water temperature difference value and the water outlet water temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, the proportional valve opening is adjusted from the target proportional valve opening to the minimum proportional valve opening, and third water temperature data is detected. The water temperature difference value of the water inlet is the water temperature difference value of the second water inlet water temperature and the first water inlet water temperature, and the water temperature difference value of the water outlet water is the water temperature difference value of the second water outlet water temperature and the first water outlet water temperature.
In the implementation, when the water inlet pipe and the water outlet pipe of the gas water heater are not connected reversely, the water outlet temperature is increased along with the increase of the opening of the proportional valve. Therefore, the water temperature difference between the second water outlet temperature and the first water outlet temperature (i.e. the water outlet temperature difference) is larger, and the water temperature difference between the second water inlet temperature and the first water inlet temperature (i.e. the water inlet temperature difference) is smaller because the water inlet temperature is basically kept unchanged. Therefore, the difference between the inlet water temperature and the outlet water temperature is negative. In the case of reverse connection of water inlet and outlet pipes of the gas water heater, the water temperature of the second water outlet and the water temperature of the first water outlet are both the water temperature of the inlet water, and the water temperature of the second water inlet and the water temperature of the first water inlet are both the water temperature of the outlet water. Therefore, the difference between the water temperature of the inlet water and the water temperature of the outlet water is a positive number. Based on the above, if the water temperature difference between the water inlet water temperature difference and the water outlet water temperature difference is greater than or equal to a preset second water temperature difference threshold, the preliminary judgment is that the water inlet pipe and the water outlet pipe may be reversely connected. At this time, the gas water heater may further adjust the proportional valve opening from the target proportional valve opening to the minimum proportional valve opening, and detect the third water temperature data. The second water temperature difference threshold may be set by a technician according to experience, which is not limited in the embodiments of the present application. Preferably, the second water temperature difference threshold may be set to be larger (e.g., 10 degrees) because the water temperature difference between the inlet water temperature difference and the outlet water temperature difference is larger.
And 103, if the second water temperature data and the third water temperature data meet the preset second water temperature condition, judging that the water inlet and outlet pipes of the gas water heater are reversely connected, and stopping heating.
In implementation, after the gas water heater detects the third water temperature data, whether the second water temperature data and the third water temperature data meet a preset second water temperature condition can be judged. If the second water temperature data and the third water temperature data meet the preset second water temperature condition, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and heating is stopped. If the second water temperature data and the third water temperature data do not meet the preset second water temperature condition, ending the flow.
Alternatively, since the gas water heater without the inflow temperature sensor includes only the outflow temperature sensor, the gas water heater with the inflow temperature sensor includes the outflow temperature sensor and the inflow temperature sensor. Therefore, the third water temperature data detected by the two types of gas water heaters are different, and further, the two types of gas water heaters judge whether the second water temperature data and the third water temperature data meet the preset second water temperature condition or not, and the specific steps are as follows:
in the first case, for a gas water heater without a water inlet temperature sensor and a gas water heater with a water inlet temperature sensor: both types of gas water heaters include a water outlet temperature sensor, and the third water temperature data includes a third water outlet temperature. Therefore, if the water temperature difference value between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
In the implementation, when the water inlet pipe and the water outlet pipe of the gas water heater are not connected reversely, the water temperature of the water outlet can be rapidly reduced after the opening of the proportional valve is adjusted from the target opening of the proportional valve to the minimum opening of the proportional valve. Therefore, the water temperature difference between the second water outlet water temperature and the third water outlet water temperature is larger. And under the condition that water inlet and outlet pipes of the gas water heater are reversely connected, the second water outlet temperature and the third water outlet temperature are both the water inlet temperature. Because the water temperature of the inlet water basically keeps unchanged, the water temperature difference between the second water outlet water temperature and the third water outlet water temperature is smaller. Based on the above, if the water temperature difference between the second water outlet water temperature and the third water outlet water temperature is smaller than or equal to the preset third water temperature difference threshold value, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and heating is stopped. The third water temperature difference threshold may be set by a technician according to experience, which is not limited in the embodiments of the present application. Preferably, the third water temperature difference threshold may be set to be small (e.g., 2 degrees) since the incoming water temperature remains substantially unchanged.
In the second case, for the gas water heater with the inlet water temperature sensor: the gas water heater of this type includes a water inlet temperature sensor and the third water temperature data includes a third water inlet temperature. Therefore, if the water temperature difference between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
In the implementation, for the condition that the water inlet pipe and the water outlet pipe of the gas water heater are not connected reversely, the water temperature difference between the second water inlet water temperature and the third water inlet water temperature is smaller because the water temperature of the water inlet is basically kept unchanged. And in the case of reverse connection of water inlet and outlet pipes of the gas water heater, the second water inlet temperature and the third water inlet temperature are both the water outlet temperature in practice. Therefore, the water temperature difference between the second water inlet water temperature and the third water inlet water temperature is large. Based on the above, if the water temperature difference between the second water inlet water temperature and the third water inlet water temperature is greater than or equal to a preset fourth water temperature threshold, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and stops heating. The fourth water temperature difference threshold may be set by a skilled person according to experience, which is not limited in the embodiment of the present application. Preferably, the fourth water temperature difference threshold value may be set to be larger (e.g., 10 degrees), since the outlet water temperature will drop rapidly after the proportional valve opening is adjusted from the target proportional valve opening to the minimum proportional valve opening.
The embodiment of the application also provides an example I of a detection method of water inlet and outlet pipe reverse connection, which is applied to a gas water heater without a water inlet temperature sensor, as shown in fig. 2, and the specific processing process is as follows:
step 201, when water flow is detected, detecting a first water outlet water temperature, and when the opening of the proportional valve reaches a target opening of the proportional valve, detecting a second water outlet water temperature.
Step 202, if the water temperature difference between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference threshold, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting the third water outlet temperature.
And 203, if the water temperature difference between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference threshold value, judging that the water inlet and outlet pipes of the gas water heater are connected reversely, and stopping heating.
The embodiment of the application also provides an example II of a detection method for the water inlet and outlet pipe reverse connection, which is applied to the gas water heater with the water inlet temperature sensor, as shown in fig. 3, and the specific processing process is as follows:
step 301, when water flow is detected, detecting first water outlet temperature and first water inlet temperature, and detecting second water outlet temperature and second water inlet temperature when the opening degree of the proportional valve reaches the target opening degree of the proportional valve.
Step 302, if the water temperature difference between the water temperature difference of the inlet water and the water temperature difference of the outlet water is greater than or equal to a preset second water temperature difference threshold, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting the third water inlet water temperature. The water temperature difference value of the water inlet is the water temperature difference value of the second water inlet water temperature and the first water inlet water temperature, and the water temperature difference value of the water outlet water is the water temperature difference value of the second water outlet water temperature and the first water outlet water temperature.
Step 303, if the water temperature difference between the second water inlet temperature and the third water inlet temperature is greater than or equal to the preset fourth water temperature threshold, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
The embodiment of the application provides a detection method for reverse connection of water inlet and outlet pipes. When the gas water heater detects water flow, first water temperature data are detected, and when the opening of the proportional valve reaches the target opening of the proportional valve, second water temperature data are detected. If the first water temperature data and the second water temperature data meet a preset first water temperature condition, the gas water heater adjusts the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detects third water temperature data; if the second water temperature data and the third water temperature data meet the preset second water temperature condition, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and heating is stopped. Therefore, when the gas water heater detects that the water inlet pipe and the water outlet pipe are connected reversely, the heating is stopped, and the user is prevented from being scalded due to the higher water outlet temperature.
The embodiment of the application also provides a detection device for the reverse connection of water inlet and outlet pipes, which is applied to a gas water heater, as shown in fig. 4, and comprises:
a first detection module 410, configured to detect first water temperature data when water flow is detected, and detect second water temperature data when the proportional valve opening reaches a target proportional valve opening;
the second detection module 420 is configured to adjust the opening of the proportional valve from the target opening of the proportional valve to a minimum opening of the proportional valve if the first water temperature data and the second water temperature data satisfy a preset first water temperature condition, and detect third water temperature data;
and the control module 430 is configured to determine that the water inlet and outlet pipes of the gas water heater are connected reversely and stop heating if the second water temperature data and the third water temperature data meet a preset second water temperature condition.
As an alternative embodiment, the first water temperature data includes a first water outlet temperature, the second water temperature data includes a second water outlet temperature, and the second detection module 420 is specifically configured to:
if the water temperature difference value between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference value threshold value, the opening of the proportional valve is adjusted from the target opening of the proportional valve to the minimum opening of the proportional valve, and third water temperature data are detected.
As an alternative embodiment, the first water temperature data further includes a first water inlet temperature, the second water temperature data further includes a second water inlet temperature, and the second detection module 420 is specifically configured to:
if the water temperature difference value of the water inlet water temperature difference value and the water outlet water temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data; the water temperature difference value of the water inlet is the water temperature difference value of the second water inlet water temperature and the first water inlet water temperature, and the water temperature difference value of the water outlet water is the water temperature difference value of the second water outlet water temperature and the first water outlet water temperature.
As an alternative embodiment, the third water temperature data includes a third outlet water temperature, and the control module 430 is specifically configured to:
if the water temperature difference value between the second water outlet water temperature and the third water outlet water temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
As an alternative embodiment, the third water temperature data includes a third water inlet temperature, and the control module 430 is specifically configured to:
if the water temperature difference between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
The embodiment of the application provides a detection device for reverse connection of water inlet and outlet pipes. When the gas water heater detects water flow, first water temperature data are detected, and when the opening of the proportional valve reaches the target opening of the proportional valve, second water temperature data are detected. If the first water temperature data and the second water temperature data meet a preset first water temperature condition, the gas water heater adjusts the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detects third water temperature data; if the second water temperature data and the third water temperature data meet the preset second water temperature condition, the gas water heater judges that the water inlet pipe and the water outlet pipe are connected reversely, and heating is stopped. Therefore, when the gas water heater detects that the water inlet pipe and the water outlet pipe are connected reversely, the heating is stopped, and the user is prevented from being scalded due to the higher water outlet temperature.
In one embodiment, a computer device is provided, as shown in fig. 5, including a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor implements the steps of the method for detecting the water inlet and outlet connection reversal when executing the computer program.
In one embodiment, a computer readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the method for detecting a water in and out connection reversal described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
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 (8)
1. The method for detecting the water inlet and outlet pipe reverse connection is characterized by being applied to a gas water heater and comprising the following steps of:
when water flow is detected, detecting first water temperature data, and when the opening of the proportional valve reaches the target opening of the proportional valve, detecting second water temperature data;
if the first water temperature data and the second water temperature data meet a preset first water temperature condition, adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve, and detecting third water temperature data; the first water temperature data comprise first water outlet water temperature, the second water temperature data comprise second water outlet water temperature, and the specific implementation process is as follows: if the water temperature difference value between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data;
the first water temperature data further comprises a first water inlet temperature, the second water temperature data further comprises a second water inlet temperature, if the water temperature difference value of the water inlet temperature difference value and the water outlet temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, the opening of the proportional valve is adjusted to the minimum proportional valve opening from the target proportional valve opening, and third water temperature data are detected; the water temperature difference value of the inlet water is the water temperature difference value of the second inlet water temperature and the first inlet water temperature, and the water temperature difference value of the outlet water is the water temperature difference value of the second outlet water temperature and the first outlet water temperature;
and if the second water temperature data and the third water temperature data meet the preset second water temperature condition, judging that the water inlet and outlet pipes of the gas water heater are connected reversely, and stopping heating.
2. The method of claim 1, wherein the third water temperature data includes a third water outlet temperature, and the determining that the water inlet and outlet pipes of the gas water heater are connected reversely and stopping heating if the second water temperature data and the third water temperature data meet a preset second water temperature condition includes:
if the water temperature difference value between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
3. The method of claim 1, wherein the third water temperature data includes a third water inlet temperature, and the determining that the water inlet and outlet pipes of the gas water heater are connected reversely and stopping heating if the second water temperature data and the third water temperature data meet a preset second water temperature condition includes:
if the water temperature difference value between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
4. A device for detecting the reverse connection of water inlet and outlet pipes, which is applied to a gas water heater and comprises:
the first detection module is used for detecting first water temperature data when water flow is detected, and detecting second water temperature data when the opening of the proportional valve reaches the target opening of the proportional valve;
the second detection module is used for adjusting the opening of the proportional valve from the target opening of the proportional valve to the minimum opening of the proportional valve and detecting third water temperature data if the first water temperature data and the second water temperature data meet a preset first water temperature condition; the first water temperature data comprise first water outlet water temperature, the second water temperature data comprise second water outlet water temperature, and the specific implementation process is as follows: if the water temperature difference value between the second water outlet temperature and the first water outlet temperature is smaller than or equal to a preset first water temperature difference value threshold value, adjusting the opening of the proportional valve from the target proportional valve opening to the minimum proportional valve opening, and detecting third water temperature data;
the first water temperature data further comprises a first water inlet temperature, the second water temperature data further comprises a second water inlet temperature, if the water temperature difference value of the water inlet temperature difference value and the water outlet temperature difference value is larger than or equal to a preset second water temperature difference value threshold value, the opening of the proportional valve is adjusted to the minimum proportional valve opening from the target proportional valve opening, and third water temperature data are detected; the water temperature difference value of the inlet water is the water temperature difference value of the second inlet water temperature and the first inlet water temperature, and the water temperature difference value of the outlet water is the water temperature difference value of the second outlet water temperature and the first outlet water temperature;
and the control module is used for judging that the water inlet and outlet pipes of the gas water heater are connected reversely and stopping heating if the second water temperature data and the third water temperature data meet the preset second water temperature condition.
5. The apparatus of any one of claims 4, wherein the third water temperature data comprises a third outlet water temperature, the control module being specifically configured to:
if the water temperature difference value between the second water outlet temperature and the third water outlet temperature is smaller than or equal to a preset third water temperature difference value threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
6. The apparatus of claim 4, wherein the third water temperature data comprises a third water inlet temperature, the control module being specifically configured to:
if the water temperature difference value between the second water inlet water temperature and the third water inlet water temperature is larger than or equal to a preset fourth water temperature threshold value, the water inlet and outlet pipes of the gas water heater are judged to be connected reversely, and heating is stopped.
7. A computer device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 3 when the computer program is executed.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 3.
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