CN111981697A - Water heater outlet water temperature control method and device and water heater - Google Patents
Water heater outlet water temperature control method and device and water heater Download PDFInfo
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- CN111981697A CN111981697A CN202010789247.1A CN202010789247A CN111981697A CN 111981697 A CN111981697 A CN 111981697A CN 202010789247 A CN202010789247 A CN 202010789247A CN 111981697 A CN111981697 A CN 111981697A
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The application relates to a water heater outlet water temperature control method, a water heater outlet water temperature control device and a water heater, wherein the method comprises the following steps: receiving the water outlet temperature fed back by the water outlet temperature sensing bulb, wherein the water outlet temperature sensing bulb is arranged at a water outlet joint of the water heater; when the difference value between the outlet water temperature and the set temperature is larger than or equal to a preset value, acquiring inlet water data sent by an inlet water detection device, wherein the inlet water detection device is arranged on a water inlet joint of the water heater; calculating to obtain theoretical outlet water temperature according to the water inlet data and the heating parameters of the water heater; and controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature. When the difference value between the outlet water temperature and the set temperature is larger than or equal to the preset value, the outlet water temperature sensing bulb is considered to be invalid, the theoretical outlet water temperature is calculated by combining the inlet water data, the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the phenomenon that a user is scalded due to overhigh outlet water temperature of the water heater caused by the invalid outlet water temperature sensing bulb is avoided, and the control reliability of the water heater is improved.
Description
Technical Field
The application relates to the technical field of household electrical equipment, in particular to a water heater water outlet temperature control method and device and a water heater.
Background
A water heater is a device that increases the temperature of cold water to hot water over a period of time. According to different principles, water heaters can be divided into electric water heaters, gas water heaters, solar water heaters, magnetic water heaters, air energy water heaters, heating water heaters and the like.
The traditional water outlet control mode of the water heater is that a water outlet temperature sensing bulb is arranged at a water outlet, and heating power is adjusted according to the temperature fed back by the water outlet temperature sensing bulb, so that the difference value between the actual water outlet temperature and the set temperature is in an allowable range. When the water outlet temperature sensing bulb is invalid, the water outlet temperature fed back by the water outlet temperature sensing bulb may be lower than the set temperature, so that the difference between the water outlet temperature and the set temperature is large, the heating power of the water heater is continuously increased, the heat load of the water heater is improved, and the water outlet temperature is continuously increased. When the temperature of the water discharged from the burner is too high, a user is easily scalded, and safety accidents occur. The traditional water outlet control mode of the water heater has the defect of low control reliability.
Disclosure of Invention
Therefore, it is necessary to provide a method and a device for controlling the outlet water temperature of a water heater and the water heater, aiming at the problem of low control reliability of the traditional water heater outlet control mode, so as to achieve the technical effect of improving the control reliability of the water heater.
A water heater outlet water temperature control method comprises the following steps:
receiving the water outlet temperature fed back by a water outlet temperature sensing bulb, wherein the water outlet temperature sensing bulb is arranged at a water outlet joint of the water heater;
when the difference value between the outlet water temperature and the set temperature is larger than or equal to a preset value, acquiring water inlet data sent by a water inlet detection device, wherein the water inlet detection device is arranged on a water inlet joint of the water heater;
calculating according to the water inlet data and the heating parameters of the water heater to obtain a theoretical water outlet temperature;
and controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature.
In one embodiment, after receiving the outlet water temperature fed back by the outlet water temperature sensing bulb, the method further includes:
and when the difference value between the outlet water temperature and the set temperature is smaller than the preset value, returning to the step of receiving the outlet water temperature fed back by the outlet water temperature sensing bulb.
In one embodiment, the water inflow detection device is a water flow sensor, and the water inflow data includes an inflow water temperature and an inflow water flow.
In one embodiment, the heating parameter comprises a gas proportional valve opening; the theoretical outlet water temperature is obtained by calculation according to the water inlet data and the heating parameters of the water heater, and the method comprises the following steps:
calculating according to the opening of the gas proportional valve to obtain combustion energy in unit time;
calculating the hot water outlet amount in unit time according to the water inlet flow meter;
and calculating to obtain the theoretical outlet water temperature according to the inlet water temperature, the combustion energy in unit time and the outlet hot water amount.
In one embodiment, the controlling the outlet water temperature of the water heater according to the theoretical outlet water temperature includes:
detecting whether the difference value between the theoretical outlet water temperature and the set temperature is greater than or equal to a preset value;
if so, adjusting the opening of the gas proportional valve, and returning to the step of acquiring the water inlet data sent by the water inlet detection device;
if not, the opening degree of the gas proportional valve is maintained, and the step of acquiring the water inlet data sent by the water inlet detection device is returned until the water heater stops discharging water.
In one embodiment, after the theoretical outlet water temperature is obtained by calculation according to the water inlet data and the heating parameter of the water heater, and before the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the method further includes:
judging whether the difference value between the theoretical outlet water temperature and the outlet water temperature fed back by the water temperature sensing bulb is greater than or equal to a set value or not;
if so, executing the step of controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature;
if not, returning to the step of acquiring the water inlet data sent by the water inlet detection device.
In one embodiment, after the outlet water temperature control is performed on the water heater according to the theoretical outlet water temperature, the method further includes:
and after the water heater stops discharging water, displaying fault prompt information.
A water heater outlet water temperature control device comprises:
the temperature acquisition module is used for receiving the water outlet temperature fed back by the water outlet temperature sensing bulb, and the water outlet temperature sensing bulb is arranged on a water outlet joint of the water heater;
the data acquisition module is used for acquiring water inlet data sent by a water inlet detection device when the difference value between the water outlet temperature and the set temperature is greater than or equal to a preset value, and the water inlet detection device is arranged at a water inlet joint of the water heater;
the data calculation module is used for calculating to obtain theoretical outlet water temperature according to the water inlet data and the heating parameters of the water heater;
and the temperature control module is used for controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature.
The utility model provides a water heater, includes combustor, heat exchanger, play water temperature sensing package, detection device intakes, segmentation valve, water connectors, gas proportional valve, air inlet joint and controller, the gas proportional valve is connected air inlet joint with the segmentation valve, the segmentation valve is connected the combustor, heat exchanger connects water connectors with water connectors, play water temperature sensing package set up in water connectors, water detection device set up in water connectors intakes, the controller is connected go out water temperature sensing package water detection device intake, the segmentation valve with gas proportional valve, the controller is used for carrying out water temperature control according to foretell method.
In one embodiment, the water heater further comprises a fan, the fan is arranged at the smoke outlet of the water heater, and the controller is connected with the fan.
According to the water heater water outlet temperature control method and device and the water heater, the water outlet temperature of the water outlet connector of the water heater is detected through the water outlet temperature sensing bulb, when the difference value between the water outlet temperature and the set temperature is larger than or equal to the preset value, water inlet data acquired by the water inlet detection device for the water inlet connector of the water heater is acquired, and the theoretical water outlet temperature is calculated according to the water inlet data and the heating parameters of the water heater; and controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature. When the difference value between the outlet water temperature and the set temperature is larger than or equal to the preset value, the outlet water temperature sensing bulb is considered to be invalid, the theoretical outlet water temperature is calculated by combining the inlet water data, the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the phenomenon that a user is scalded due to overhigh outlet water temperature of the water heater caused by the invalid outlet water temperature sensing bulb is avoided, and the control reliability of the water heater is improved.
Drawings
FIG. 1 is a flow chart of a method for controlling the outlet water temperature of a water heater according to an embodiment;
FIG. 2 is a flow chart illustrating calculation of theoretical outlet water temperature according to inlet water data and heating parameters of the water heater according to an embodiment;
FIG. 3 is a flow chart of a method for controlling the outlet water temperature of a water heater according to another embodiment;
FIG. 4 is a block diagram of an embodiment of a water outlet temperature control device of a water heater;
FIG. 5 is a block diagram of an outlet water temperature control device of a water heater according to another embodiment;
FIG. 6 is a schematic diagram illustrating the outlet water temperature control principle of the water heater according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, a method for controlling outlet water temperature of a water heater is provided, the water heater can be an electric water heater, a gas water heater, or the like, and as shown in fig. 1, the method comprises the following steps:
step S110: and receiving the water outlet temperature fed back by the water outlet temperature sensing bulb. The water outlet temperature sensing bulb is arranged on a water outlet joint of the water heater. Specifically, the controller of the water heater can be connected with the water outlet temperature sensing bulb to receive the water outlet temperature detected and fed back by the water outlet temperature sensing bulb to the water outlet joint.
Step S120: and when the difference value between the outlet water temperature and the set temperature is greater than or equal to a preset value, acquiring inlet water data sent by the inlet water detection device.
The water inlet detection device is arranged on a water inlet joint of the water heater. The specific value of the preset value is not unique and can be set according to the actual situation. The user can set the required outlet water temperature through the button of water heater, and the controller preserves the temperature set by the user as the set temperature. The controller compares the outlet water temperature fed back by the outlet water temperature sensing bulb with the stored set temperature, when the difference value of the outlet water temperature and the set temperature is larger than or equal to the preset value, the failure of the water temperature sensing bulb can be preliminarily determined, and the inlet water data sent by the inlet water detection device is received and serves as a reference basis for the subsequent outlet water temperature control of the water heater. The specific type of the water inlet detection device is not unique, in this embodiment, the water inlet detection device is a water flow sensor, and the water inlet data includes the water inlet temperature and the water inlet flow.
In addition, when the difference between the outlet water temperature and the set temperature is smaller than the preset value, it indicates that the outlet water temperature sensing bulb is normal, and the water heater operates normally, and the step S110 can be returned to continue to monitor the outlet water temperature fed back by the outlet water temperature sensing bulb.
Step S130: and calculating to obtain the theoretical outlet water temperature according to the water inlet data and the heating parameters of the water heater.
The specific contents of the heating parameters can also correspond to all differences according to the types of the water heaters. For example, if the water heater is a gas water heater, the heating parameters may include the opening degree of a gas proportional valve; if the water heater is an electric water heater, the heating parameters may include electric heating power, etc. And the controller calculates the theoretical outlet water temperature of the water heater during working according to the acquired inlet water temperature and the heating parameters of the water heater.
Step S140: and controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature.
After the theoretical outlet water temperature is obtained through calculation, the controller can control the outlet water temperature of the water heater according to the size relation between the theoretical outlet water temperature and the set temperature. Taking a gas water heater as an example, when the theoretical outlet water temperature is higher than the set temperature, the controller can reduce the opening degree of the gas proportional valve so as to reduce the outlet water temperature, and when the theoretical outlet water temperature is lower than the set temperature, the opening degree of the gas proportional valve is increased so as to raise the outlet water temperature, so that the difference value between the theoretical outlet water temperature and the set temperature is within an allowable range through repeated adjustment.
According to the water heater outlet temperature control method, when the difference value between the outlet water temperature and the set temperature is larger than or equal to the preset value, the outlet water temperature sensing bulb is considered to be invalid, the theoretical outlet water temperature is calculated by combining the inlet water data, the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the phenomenon that a user is scalded due to overhigh outlet water temperature of the water heater caused by the invalid outlet water temperature sensing bulb is avoided, and the control reliability of the water heater is improved.
In one embodiment, taking a gas water heater as an example, the heating parameter includes a gas proportional valve opening; as shown in fig. 2, step S130 includes steps S132 to S136.
Step S132: and calculating to obtain the combustion energy in unit time according to the opening of the gas proportional valve.
The value of the unit time is not exclusive and may be 1 minute or 1 hour. Specifically, the theoretical combustion energy of the gas proportional valve at different opening degrees can be analyzed in advance according to the size of a gas inlet pipeline of the gas water heater. For example, under the condition that the structure of the gas water heater is not changed, the corresponding relation between the opening degree of the gas proportional valve and the combustion energy in unit time can be analyzed through a PID (proportion integration differentiation) model algorithm. In actual use, the controller changes the opening degree of the gas proportional valve by controlling the current transmitted to the gas proportional valve. Therefore, the controller can determine the opening of the gas proportional valve according to the current transmitted to the gas proportional valve, and further directly determine the combustion energy in the unit time under the current opening of the gas proportional valve.
Step S134: and calculating the hot water outlet amount in unit time according to the water inlet flow meter. Specifically, the controller can prestore structural parameters such as the pipe diameter of a heat exchanger of the gas water heater, and the hot water outlet amount in unit time can be calculated by combining the stored structural parameters and the collected water inlet flow.
Step S136: and calculating to obtain the theoretical outlet water temperature according to the inlet water temperature, the combustion energy in unit time and the outlet hot water amount.
After the controller determines the combustion energy and the hot water output in unit time, the controller can calculate the degree of heating the hot water output by the combustion energy of the gas water heater, and then the theoretical water output temperature can be calculated by combining the water inlet temperature before heating. Specifically, in one embodiment, step S136 includes:
Q＝MC(tw2-tw1)
wherein Q represents combustion energy, C is specific heat of water, and is 4.19 × 10-3MJ/(kg. K); m is the hot water yield, and the unit is kilogram per minute (kg/min); t is tw2The theoretical water outlet temperature is given in degrees centigrade (DEG C); t is tw1Is the temperature of the inlet water in degrees Celsius (. degree. C.).
In one embodiment, step S140 includes: detecting whether the difference value between the theoretical outlet water temperature and the set temperature is greater than or equal to a preset value; if so, adjusting the opening of the gas proportional valve, and returning to the step of acquiring the water inlet data sent by the water inlet detection device; if not, the opening degree of the gas proportional valve is maintained, and the step of acquiring the water inlet data sent by the water inlet detection device is returned until the water heater stops discharging water.
The controller compares whether the difference value between the theoretical outlet water temperature and the set temperature is larger than or equal to a preset value, if yes, the difference value between the outlet water temperature and the set temperature is considered to be too large, and the opening degree of the fuel gas proportional valve is adjusted to reduce the difference value between the outlet water temperature and the set temperature. Specifically, if the theoretical outlet water temperature is higher than the set temperature and the difference value between the theoretical outlet water temperature and the set temperature is greater than or equal to a preset value, the opening degree of the gas proportional valve is reduced; and if the theoretical outlet water temperature is lower than the set temperature and the difference value of the theoretical outlet water temperature and the set temperature is greater than or equal to the preset value, increasing the opening of the gas proportional valve. And after the difference between the outlet water temperature and the set temperature is reduced by adjusting the opening of the gas proportional valve, the inlet water data sent by the inlet water detection device is obtained again to recalculate the theoretical outlet water temperature until the difference between the theoretical outlet water temperature and the set temperature is smaller than the preset value.
If the controller detects that the difference value between the theoretical water outlet temperature and the set temperature is smaller than the preset value, the fact that the opening degree of the gas proportional valve at the moment meets the use requirement of a user is indicated, the opening degree of the gas proportional valve is kept unchanged, the use requirement at the moment is maintained, water inlet data sent by the water inlet detection device are obtained again, data are collected again, the theoretical water outlet temperature is calculated and analyzed until the water heater stops discharging water, and therefore in the use process of the water heater, if the water inlet data change, the use requirement of the user can be met.
In one embodiment, after step S130 and before step S140, the method further comprises: judging whether the difference value between the theoretical outlet water temperature and the outlet water temperature fed back by the water temperature sensing bulb is greater than or equal to a set value or not; if yes, go to step S140; if not, returning to the step of acquiring the water inlet data sent by the water inlet detection device.
The specific value of the set value is not unique, specifically, when the difference value between the outlet water temperature and the set temperature is greater than or equal to the preset value, the theoretical outlet water temperature is obtained through calculation after the failure of the water temperature sensing bulb is determined preliminarily, the theoretical outlet water temperature is compared with the outlet water temperature fed back by the water temperature sensing bulb, when the difference value between the theoretical outlet water temperature and the outlet water temperature fed back by the water temperature sensing bulb is greater than or equal to the set value, the difference between the temperature sensed by the water temperature sensing bulb and the theoretical outlet water temperature is considered to be too large, the failure of the water temperature sensing bulb can be further determined, and then the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature.
In one embodiment, as shown in fig. 3, after step S140, the method further includes step S150.
Step S150: and after the water heater stops discharging water, displaying fault prompt information.
Specifically, when a user turns off a faucet or presses a switch of the water heater to stop the water outlet of the water heater, the controller can display fault prompt information through a display screen of the water heater to remind the user of the fault of the water outlet temperature sensing bulb so as to replace the water outlet temperature sensing bulb in time. The specific mode of displaying the fault prompt message is not unique, and may be displaying text message or displaying corresponding fault code.
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, a water heater outlet temperature control device is also provided, the water heater can be an electric water heater, a gas water heater, etc., as shown in fig. 4, the device includes a temperature acquisition module 110, a data acquisition module 120, a data calculation module 130 and a temperature control module 140.
The temperature acquisition module 110 is configured to receive an outlet water temperature fed back by the outlet water temperature sensing bulb, and the outlet water temperature sensing bulb is disposed at an outlet water connector of the water heater. The data obtaining module 120 is configured to obtain water inlet data sent by the water inlet detection device when a difference between the water outlet temperature and the set temperature is greater than or equal to a preset value, where the water inlet detection device is disposed on a water inlet joint of the water heater. The data calculating module 130 is configured to calculate a theoretical outlet water temperature according to the inlet water data and the heating parameter of the water heater. The temperature control module 140 is used for controlling the outlet water temperature of the water heater according to the theoretical outlet water temperature.
The user can set the required outlet water temperature through the keys of the water heater, and the temperature set by the user is stored as the set temperature. The outlet water temperature fed back by the outlet water temperature sensing bulb is compared with the stored set temperature, when the difference value of the outlet water temperature and the set temperature is larger than or equal to the preset value, the failure of the water temperature sensing bulb can be preliminarily determined, and the inlet water data sent by the inlet water detection device is received and used as a reference basis for the subsequent outlet water temperature control of the water heater. The specific type of the water inlet detection device is not unique, in this embodiment, the water inlet detection device is a water flow sensor, and the water inlet data includes the water inlet temperature and the water inlet flow. In addition, when the difference between the outlet water temperature and the set temperature is smaller than the preset value, the temperature acquisition module 110 may continue to monitor the outlet water temperature fed back by the outlet water temperature sensing bulb.
The specific contents of the heating parameters can also correspond to all differences according to the types of the water heaters. For example, if the water heater is a gas water heater, the heating parameters may include the opening degree of a gas proportional valve; if the water heater is an electric water heater, the heating parameters may include electric heating power, etc. After the theoretical outlet water temperature is obtained through calculation, the outlet water temperature of the water heater can be controlled according to the size relation between the theoretical outlet water temperature and the set temperature. Taking a gas water heater as an example, when the theoretical outlet water temperature is higher than the set temperature, the opening degree of the gas proportional valve is reduced so as to reduce the outlet water temperature, and when the theoretical outlet water temperature is lower than the set temperature, the opening degree of the gas proportional valve is increased so as to raise the outlet water temperature, so that the difference value between the theoretical outlet water temperature and the set temperature is in an allowable range by repeatedly adjusting.
In one embodiment, taking a gas water heater as an example, the heating parameter includes a gas proportional valve opening; the data calculation module 130 calculates and obtains the combustion energy in unit time according to the opening degree of the gas proportional valve; calculating the hot water outlet amount in unit time according to the water inlet flow meter; and calculating to obtain the theoretical outlet water temperature according to the inlet water temperature, the combustion energy in unit time and the outlet hot water amount.
The value of the unit time is not exclusive and may be 1 minute or 1 hour. Specifically, the theoretical combustion energy of the gas proportional valve at different opening degrees can be analyzed in advance according to the size of a gas inlet pipeline of the gas water heater. In actual use, the opening degree of the gas proportional valve is changed by controlling the current transmitted to the gas proportional valve. Therefore, the opening degree of the gas proportional valve can be determined according to the current transmitted to the gas proportional valve, and the combustion energy in the unit time under the current opening degree of the gas proportional valve can be directly determined.
After the controller determines the combustion energy and the hot water output in unit time, the controller can calculate the degree of heating the hot water output by the combustion energy of the gas water heater, and then the theoretical water output temperature can be calculated by combining the water inlet temperature before heating. Specifically, in one embodiment, calculating the theoretical outlet water temperature from the inlet water temperature, the combustion energy per unit time, and the outlet hot water amount comprises:
Q＝MC(tw2-tw1)
wherein Q represents combustion energy, C is specific heat of water, and is 4.19 × 10-3MJ/(kg. K); m is the hot water yield, and the unit is kilogram per minute (kg/min); t is tw2The theoretical water outlet temperature is given in degrees centigrade (DEG C); t is tw1Is the temperature of the inlet water in degrees Celsius (. degree. C.).
In one embodiment, the temperature control module 140 detects whether the difference between the theoretical outlet water temperature and the set temperature is greater than or equal to a preset value; if so, adjusting the opening of the gas proportional valve, and controlling the data acquisition module 120 to acquire the water inlet data sent by the water inlet detection device again; if not, the opening degree of the gas proportional valve is maintained, and the data acquisition module 120 is controlled to acquire the water inlet data sent by the water inlet detection device again until the water heater stops discharging water.
If the theoretical outlet water temperature is higher than the set temperature and the difference value of the theoretical outlet water temperature and the set temperature is larger than or equal to the preset value, the opening degree of the gas proportional valve is reduced; and if the theoretical outlet water temperature is lower than the set temperature and the difference value of the theoretical outlet water temperature and the set temperature is greater than or equal to the preset value, increasing the opening of the gas proportional valve. If the difference value between the theoretical water outlet temperature and the set temperature is smaller than the preset value, the fact that the opening degree of the gas proportional valve at the moment meets the use requirement of a user is shown, the opening degree of the gas proportional valve is kept unchanged, the use requirement at the moment is maintained, water inlet data sent by the water inlet detection device is obtained again, data are collected again, the theoretical water outlet temperature is calculated and analyzed until the water heater stops discharging water, and therefore in the use process of the water heater, if the water inlet data change, the use requirement of the user can be met.
In one embodiment, the temperature control module 140 further determines whether the difference between the theoretical outlet water temperature and the outlet water temperature fed back by the water temperature sensing bulb is greater than or equal to a set value; if so, controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature; if not, the control data obtaining module 120 obtains the water inflow data sent by the water inflow detection device again.
When the difference value between the water outlet temperature and the set temperature is larger than or equal to the preset value, the theoretical water outlet temperature is obtained through calculation after the water temperature sensing bulb is determined to be invalid preliminarily, the theoretical water outlet temperature is compared with the water outlet temperature fed back by the water temperature sensing bulb, when the difference value between the theoretical water outlet temperature and the water outlet temperature fed back by the water temperature sensing bulb is larger than or equal to the set value, the difference between the temperature sensed by the water temperature sensing bulb and the theoretical water outlet temperature is considered to be too large, the water temperature sensing bulb can be further determined to be invalid, and at the moment, the water outlet temperature of the water heater is controlled according to the theoretical water outlet temperature.
As shown in fig. 5, the apparatus further includes a fault notification module 150. The fault prompt module 150 is used for displaying fault prompt information after the water heater stops water outlet. When a user turns off the faucet or presses the switch of the water heater to stop the water outlet of the water heater, the controller can display fault prompt information through a display screen of the water heater to remind the user of the fault of the water outlet temperature sensing bulb so as to replace the water outlet temperature sensing bulb in time.
For specific limitations of the outlet water temperature control device of the water heater, reference may be made to the above limitations of the outlet water temperature control method of the water heater, and details thereof are not repeated here. All modules in the water heater outlet water temperature control device can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
According to the water outlet temperature control device of the water heater, when the difference value between the water outlet temperature and the set temperature is larger than or equal to the preset value, the water outlet temperature sensing bulb is considered to be invalid, the theoretical water outlet temperature is calculated by combining water inlet data, the water outlet temperature of the water heater is controlled according to the theoretical water outlet temperature, the phenomenon that a user is scalded due to overhigh water outlet temperature of the water heater caused by the invalid water outlet temperature sensing bulb is avoided, and the control reliability of the water heater is improved.
In one embodiment, a water heater is further provided, and the water heater comprises a combustor, a heat exchanger, a water outlet temperature sensing bulb, a water inlet detection device, a segment valve, a water outlet connector, a water inlet connector, a gas proportional valve, a gas inlet connector and a controller, wherein the gas proportional valve is connected with the gas inlet connector and the segment valve, the segment valve is connected with the combustor, the heat exchanger is connected with the water inlet connector and the water outlet connector, the water outlet temperature sensing bulb is arranged at the water outlet connector, the water inlet detection device is arranged at the water inlet connector, the controller is connected with the water outlet temperature sensing bulb, the water inlet detection device, the segment valve and the gas proportional valve, and the controller is used for controlling the water outlet temperature according to the method. Wherein, the water inflow detection device can specifically adopt a water flow sensor. In addition, in one embodiment, the water heater further comprises a fan, the fan is arranged at the smoke outlet of the water heater, and the controller is connected with the fan.
Specifically, the working principle of the gas water heater is that gas is completely combusted in a combustion chamber to generate high-temperature flue gas. When high-temperature flue gas flows through the heat exchanger, cold water is heated into required sanitary hot water. The cold water entering the water heater enters the heat exchanger through the water flow sensor, and in the heat exchanger, the cold water is heated by the high-temperature flue gas and immediately becomes hot water to be output. The gas enters the burner after passing through the gas proportional valve and the segment valve, and the gas is ignited by pulse discharge at the fire hole of the burner to form stable flame. The gas is burnt out in the combustion chamber, and the high-temperature flue gas generated by combustion flows to the heat exchanger, and is discharged from the smoke outlet after being cooled by the heat exchanger.
The gas proportional valve is connected with the gas inlet joint, and the working principle of the gas proportional valve is that after the coil obtains control current, a magnetic field force repelling with the permanent magnet is generated and pushes the permanent magnet and the ball valve to move downwards, the opening degree of a valve port is increased, the gas quantity is increased, namely the coil can be used for controlling the current to adjust the gas quantity so as to realize a hot water temperature value set by a user. The water flow sensor can be specifically connected with a water inlet pipe of the heat exchanger and used for detecting the temperature of inlet water and the water flow. The water outlet temperature sensing bulb is arranged at the water outlet joint and used for detecting the actual water outlet temperature.
The outlet water temperature control principle of the water heater is shown in fig. 6, when the gas water heater operates, the system continuously receives the current outlet water temperature fed back by the outlet water temperature sensing bulb (namely the actual outlet water temperature), compares the current outlet water temperature with the temperature set by the user, operates normally if the difference between the outlet water temperature fed back by the temperature sensing bulb and the set temperature is smaller than the preset value, and collects the outlet water temperature sent by the outlet water temperature sensing bulb again. When the difference value between the outlet water temperature fed back by the outlet water temperature sensing bulb and the set temperature is larger than or equal to the preset value, after the system preliminarily determines that the temperature sensing bulb is invalid, the controller collects the water flow collected by the water flow sensor at present, the inlet water temperature sensed by the inlet water temperature sensing bulb on the water flow sensor, the opening degree of the corresponding gas proportional valve of the gas proportional valve, and the like, and calculates to obtain the current theoretical outlet water temperature of the water heater. When the difference between the theoretical outlet water temperature and the outlet water temperature fed back by the temperature sensing bulb is too large, the controller compares the theoretical outlet water temperature with the set temperature, and if the difference between the calculated theoretical outlet water temperature and the set temperature is smaller than a preset value, data are collected again and then the theoretical outlet water temperature is calculated. When the difference value between the theoretical outlet water temperature and the set temperature is larger than or equal to the preset value, the opening degree of the gas proportional valve is adjusted by adjusting the current of the proportional valve, the theoretical outlet water temperature is calculated by collecting inlet water data again until the difference value between the theoretical outlet water temperature and the set temperature is smaller than the preset value, the theoretical outlet water temperature reaches the set water temperature range, the water heater maintains the use requirement of the time, and after the use is finished, the system displays a fault code.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for controlling the outlet water temperature of a water heater is characterized by comprising the following steps:
receiving the water outlet temperature fed back by a water outlet temperature sensing bulb, wherein the water outlet temperature sensing bulb is arranged at a water outlet joint of the water heater;
when the difference value between the outlet water temperature and the set temperature is larger than or equal to a preset value, acquiring water inlet data sent by a water inlet detection device, wherein the water inlet detection device is arranged on a water inlet joint of the water heater;
calculating according to the water inlet data and the heating parameters of the water heater to obtain a theoretical water outlet temperature;
and controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature.
2. The method for controlling the outlet water temperature of the water heater according to claim 1, wherein after receiving the outlet water temperature fed back by the outlet water temperature sensing bulb, the method further comprises:
and when the difference value between the outlet water temperature and the set temperature is smaller than the preset value, returning to the step of receiving the outlet water temperature fed back by the outlet water temperature sensing bulb.
3. The method for controlling outlet water temperature of a water heater according to claim 1, wherein the inlet water detecting device is a water flow sensor, and the inlet water data includes inlet water temperature and inlet water flow.
4. The water heater outlet water temperature control method according to claim 3, wherein the heating parameter comprises a gas proportional valve opening degree; the theoretical outlet water temperature is obtained by calculation according to the water inlet data and the heating parameters of the water heater, and the method comprises the following steps:
calculating according to the opening of the gas proportional valve to obtain combustion energy in unit time;
calculating the hot water outlet amount in unit time according to the water inlet flow meter;
and calculating to obtain the theoretical outlet water temperature according to the inlet water temperature, the combustion energy in unit time and the outlet hot water amount.
5. The method for controlling the outlet water temperature of the water heater according to claim 4, wherein the outlet water temperature control of the water heater according to the theoretical outlet water temperature comprises the following steps:
detecting whether the difference value between the theoretical outlet water temperature and the set temperature is greater than or equal to a preset value;
if so, adjusting the opening of the gas proportional valve, and returning to the step of acquiring the water inlet data sent by the water inlet detection device;
if not, the opening degree of the gas proportional valve is maintained, and the step of acquiring the water inlet data sent by the water inlet detection device is returned until the water heater stops discharging water.
6. The method for controlling outlet water temperature of a water heater according to any one of claims 1 to 5, wherein after the theoretical outlet water temperature is calculated according to the inlet water data and the heating parameters of the water heater, and before the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the method further comprises:
judging whether the difference value between the theoretical outlet water temperature and the outlet water temperature fed back by the water temperature sensing bulb is greater than or equal to a set value or not;
if so, executing the step of controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature;
if not, returning to the step of acquiring the water inlet data sent by the water inlet detection device.
7. The method for controlling the outlet water temperature of the water heater according to any one of claims 1 to 5, wherein after the outlet water temperature of the water heater is controlled according to the theoretical outlet water temperature, the method further comprises:
and after the water heater stops discharging water, displaying fault prompt information.
8. The utility model provides a water heater leaving water temperature control device which characterized in that includes:
the temperature acquisition module is used for receiving the water outlet temperature fed back by the water outlet temperature sensing bulb, and the water outlet temperature sensing bulb is arranged on a water outlet joint of the water heater;
the data acquisition module is used for acquiring water inlet data sent by a water inlet detection device when the difference value between the water outlet temperature and the set temperature is greater than or equal to a preset value, and the water inlet detection device is arranged at a water inlet joint of the water heater;
the data calculation module is used for calculating to obtain theoretical outlet water temperature according to the water inlet data and the heating parameters of the water heater;
and the temperature control module is used for controlling the water outlet temperature of the water heater according to the theoretical water outlet temperature.
9. The utility model provides a water heater, its characterized in that, includes combustor, heat exchanger, play water temperature sensing package, the detection device of intaking, segmentation valve, water connectors, water supply connector, gas proportional valve, air inlet connector and controller, the gas proportional valve connect the air inlet connector with the segmentation valve, the segmentation valve is connected the combustor, heat exchanger connects water supply connector with the water connectors, go out the water temperature sensing package set up in the water connectors, the detection device of intaking set up in the water connectors, the controller is connected go out the water temperature sensing package, the detection device of intaking, the segmentation valve with the gas proportional valve, the controller is used for carrying out a water temperature control according to the method of any one of claims 1-7.
10. The water heater of claim 9, further comprising a fan disposed at an exhaust port of the water heater, wherein the controller is connected to the fan.
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| CN202010789247.1A CN111981697A (en) | 2020-08-07 | 2020-08-07 | Water heater outlet water temperature control method and device and water heater |
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| CN202010789247.1A CN111981697A (en) | 2020-08-07 | 2020-08-07 | Water heater outlet water temperature control method and device and water heater |
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| CN111981697A true CN111981697A (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4261464A1 (en) * | 2022-04-11 | 2023-10-18 | Viessmann Climate Solutions SE | Method for determining a supply temperature, method for controlling a heat generator, method for starting a heat generator, heat generator and control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145447A (en) * | 1983-02-07 | 1984-08-20 | Matsushita Electric Ind Co Ltd | Compact hot water feed device |
| DE10217272A1 (en) * | 2002-04-18 | 2003-11-06 | Ecm Energy Contracting Man Lip | A method for controlling the heating performance of a room heating system has measurements of the input and output temperatures of the boiler and a volume flow controller. |
| CN102235755A (en) * | 2010-04-23 | 2011-11-09 | 关隆股份有限公司 | Water temperature control method and device for water heater |
| CN107965918A (en) * | 2017-05-12 | 2018-04-27 | 宁波方太厨具有限公司 | Gas heater intelligent diagnosis system |
| CN110986375A (en) * | 2019-11-29 | 2020-04-10 | 华帝股份有限公司 | Method for identifying failure of temperature detection device and gas water heater |
-
2020
- 2020-08-07 CN CN202010789247.1A patent/CN111981697A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145447A (en) * | 1983-02-07 | 1984-08-20 | Matsushita Electric Ind Co Ltd | Compact hot water feed device |
| DE10217272A1 (en) * | 2002-04-18 | 2003-11-06 | Ecm Energy Contracting Man Lip | A method for controlling the heating performance of a room heating system has measurements of the input and output temperatures of the boiler and a volume flow controller. |
| CN102235755A (en) * | 2010-04-23 | 2011-11-09 | 关隆股份有限公司 | Water temperature control method and device for water heater |
| CN107965918A (en) * | 2017-05-12 | 2018-04-27 | 宁波方太厨具有限公司 | Gas heater intelligent diagnosis system |
| CN110986375A (en) * | 2019-11-29 | 2020-04-10 | 华帝股份有限公司 | Method for identifying failure of temperature detection device and gas water heater |
Non-Patent Citations (1)
| Title |
|---|
| 刘景昌: "《日用电器维修与测试技术》", 31 March 1993, 河南科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4261464A1 (en) * | 2022-04-11 | 2023-10-18 | Viessmann Climate Solutions SE | Method for determining a supply temperature, method for controlling a heat generator, method for starting a heat generator, heat generator and control device |
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