CN112361611B - Gas water heater control method, device and system and gas water heater - Google Patents
Gas water heater control method, device and system and gas water heater Download PDFInfo
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- CN112361611B CN112361611B CN202011220799.7A CN202011220799A CN112361611B CN 112361611 B CN112361611 B CN 112361611B CN 202011220799 A CN202011220799 A CN 202011220799A CN 112361611 B CN112361611 B CN 112361611B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The application relates to a gas water heater control method, a gas water heater control device, a gas water heater control system and a gas water heater. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a gas water heater control method, device and system and a gas water heater.
Background
The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water. The gas water heater has the advantages of being ready to use, free of waiting, small in occupied area, high in use safety performance and the like, and is widely applied to the fields of household bathrooms and the like.
However, when the user is bathing, if the user temporarily turns off the hot water, the temperature of the hot water rises under the heating of the higher residual temperature of the heat exchanger because the water does not flow when the user is turned off; when the water faucet is turned on again, because the ignition and heating of the water heater need a certain time, at the moment, a section of cold water flows out, and therefore when the water faucet of the water heater is turned on and off, the phenomenon that the water is firstly heated and then cooled and then returns to normal can occur. Therefore, the traditional gas water heater has the defect of unstable water temperature in the using process.
Disclosure of Invention
Therefore, it is necessary to provide a method, a device and a system for controlling a gas water heater and the gas water heater, aiming at the problem of unstable water temperature in the use process of the traditional gas water heater.
A gas water heater control method comprising: when a bathing mode starting instruction is received, controlling the gas water heater to be started for heating according to a water flow signal; when the fact that a user stops using water is detected, whether a water pump starting condition is met or not is analyzed according to the water inlet temperature of the gas water heater; and when the water pump opening condition is met, controlling the water pump to be opened and returning to the step of controlling the gas water heater to be opened for heating according to the water flow signal.
In one embodiment, the gas water heater control method further comprises: when a zero cold water mode instruction is received, controlling a water pump to be started and operated, and controlling a gas water heater to be started for heating according to a water flow signal; and controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater, wherein the water outlet temperature is collected and sent by a water outlet temperature collector arranged on a water outlet pipeline of the gas water heater.
In one embodiment, the step of controlling the gas water heater to be turned on for heating according to the water flow signal comprises the following steps: when a water flow signal is detected, a fan of the gas water heater is started at a first preset rotating speed to clean the gas water heater, and whether an air duct of the gas water heater is blocked is detected; when the air channel is not blocked, controlling the fan to be reduced to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to be opened for ignition; and if flame is detected within the first preset time, the gas water heater is kept to be started to operate.
In one embodiment, after the step of controlling the fan to decrease to the second preset rotation speed and controlling the gas proportional valve and the gas pilot valve of the gas water heater to open for ignition when the air duct is not blocked, the method further includes: if the flame is not detected within the first preset time, judging whether secondary ignition is needed; when secondary ignition is needed, returning to the step of controlling the fan to reduce to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to open for ignition; and when secondary ignition is not needed, closing the gas proportional valve and the gas sectional valve, and outputting fault prompt information.
In one embodiment, after the step of maintaining the gas water heater in the on-state operation if the flame is detected within the first preset time period, the method further includes: and acquiring the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater to adjust the gas proportional valve and the gas sectional valve.
In one embodiment, the step of controlling the start and stop of the water pump according to the inlet water temperature of the gas water heater and the outlet water temperature of the gas water heater includes: judging whether the water inlet temperature of the gas water heater is higher than a first preset temperature or not and whether the water outlet temperature of the gas water heater is higher than a second preset temperature or not; and when the water inlet temperature is higher than a first preset temperature and the water outlet temperature is higher than a second preset temperature, controlling the water pump to stop running.
In one embodiment, after the step of controlling the water pump to stop operating, the method further includes: acquiring the water inlet temperature in real time and comparing and analyzing the water inlet temperature with a third preset temperature, wherein the third preset temperature is lower than the second preset temperature; and returning to the step of controlling the water pump to start to operate when the inlet water temperature is lower than a third preset temperature.
In one embodiment, the step of analyzing whether the water pump starting condition is met according to the inlet water temperature of the gas water heater when the user is detected to stop using water comprises the following steps: when the water flow signal disappears and the disappearance time reaches a second preset time, judging whether the water inlet temperature of the gas water heater is lower than a first preset temperature or not; when the inlet water temperature is lower than a first preset temperature, generating a water pump starting control signal; judging whether the water pump starting control signal is generated for the first time; when the water pump opening condition is met, the step of controlling the water pump to be opened and returning to control the gas water heater to be opened for heating according to the water flow signal comprises the following steps of: and when the water pump starting control signal is generated for the first time, controlling the water pump to be started according to the water pump starting control signal and returning to the step of controlling the gas water heater to be started for heating according to the water flow signal.
A gas water heater control device comprising: the bathing mode starting module is used for controlling the gas water heater to be started for heating according to the water flow signal when receiving the bathing mode starting instruction; the water pump starting analysis module is used for analyzing whether a water pump starting condition is met or not according to the water inlet temperature of the gas water heater when the fact that a user stops using water is detected; and the water pump starting control module is used for controlling the water pump to be started and controlling the bathing mode starting module to execute the operation of controlling the gas water heater to be started for heating according to the water flow signal when the water pump starting condition is met.
The utility model provides a gas water heater control system, includes master control set, flow collector and the temperature collector of intaking, flow collector with the temperature collector of intaking sets up respectively in gas water heater's inlet channel, flow collector with the temperature collector of intaking connects respectively master control set, master control set is used for carrying out gas water heater's operation control according to above-mentioned method.
In one embodiment, the gas water heater control system further comprises an outlet water temperature collector, and the outlet water temperature collector is arranged on an outlet water pipeline of the gas water heater and connected with the main control device.
In one embodiment, the gas water heater control system further comprises a constant temperature water tank disposed between the water outlet pipeline of the gas water heater and the external user water pipeline.
A gas water heater comprises the gas water heater control system.
According to the gas water heater control method, the device and the system and the gas water heater, when a user uses the gas water heater for bathing, the gas water heater is controlled to be started for heating according to the detected water flow signal, and hot water is provided for the user. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for controlling a gas water heater according to an embodiment;
FIG. 2 is a flow chart of a control method of a gas water heater according to another embodiment;
FIG. 3 is a schematic illustration of a combustion control flow according to an embodiment;
FIG. 4 is a flow chart of a method for controlling a gas water heater according to an embodiment;
FIG. 5 is a schematic diagram of a control flow for starting the water pump according to an embodiment;
FIG. 6 is a schematic diagram of a start-stop control process of the water pump according to an embodiment;
FIG. 7 is a flow chart of a control method of a gas water heater in another embodiment;
FIG. 8 is a schematic structural diagram of a control device of a gas water heater according to an embodiment;
FIG. 9 is a schematic structural diagram of a control device of a gas water heater in another embodiment;
FIG. 10 is a schematic diagram of a control system of the gas water heater according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, a method for controlling a gas water heater includes steps S100, S200 and S300.
And S100, controlling the gas water heater to be started for heating according to the water flow signal when the bathing mode starting instruction is received.
Specifically, the water flow signal is collected and transmitted by a flow collector arranged on a water inlet pipeline of the gas water heater. The gas water heater is provided with a main control device for receiving all parameters to realize the operation control of the gas water heater, and in the embodiment, when the main control device receives a bathing mode starting instruction, the main control device controls the gas water heater to enter a bathing mode to heat inflow cold water. The bathing mode is a mode that a user needs to directly use hot water, and in the bathing mode, hot water obtained by heating the gas water heater through the heat exchanger is provided for the user through a water outlet of the gas water heater. Therefore, in the bathing mode, cold water needs to be continuously fed in for heating, and then hot water is provided for the user.
It should be noted that the manner of receiving the bathing mode power-on instruction by the main control device is not exclusive, and in one embodiment, the gas water heater may be provided with a touch display device, and when a user needs to use hot water, the user directly operates on the touch display device to issue a corresponding instruction, and finally transmits the instruction to the main control device connected with the touch display device. In other embodiments, the user can also realize the operation by voice or mechanical keys arranged on the gas water heater.
And step S200, when the user stops using water, analyzing whether the water pump starting condition is met according to the water inlet temperature of the gas water heater.
Specifically, the inlet water temperature is collected and sent by an inlet water temperature collector arranged on the inlet water pipeline of the gas water heater. The water inlet temperature is the water temperature at the water inlet, when cold water flows in, the water temperature is the water temperature of the water, and when no water circulation or cold water flows in, the water inlet temperature is the temperature of the residual water at the water inlet. The user stops hot water, that is, no cold water flows into the gas water heater, and the combustion system of the corresponding gas water heater also stops running. Under this kind of state, if gas heater does not carry out hydrologic cycle heating, increase along with time, the inside remaining hot water temperature of water system that the gas heater is relevant will reduce gradually, when the user opens once more and uses hot water, can flow out partly cold water, influences user's water experience. The temperature of the water inlet department when this embodiment stops the water use state according to the user carries out the analysis, and when the temperature of intaking reached certain condition, master control set can control gas heater's water pump and open the operation, heats the inside water of whole gas heater water system, and the condition of temperature quenching when avoiding appearing the user and using water once more.
It can be understood that the main control device does not have to detect whether the user stops using water, and in one embodiment, the main control device can detect the water flow, when the user needs to use hot water, the external water source can continuously provide cold water for the gas water heater to heat, and when the user stops using water, the external water source can correspondingly stop supplying cold water. In other embodiments, the main control device may also be implemented by receiving a water use pause instruction sent by a user.
And step S300, controlling the water pump to be started when the water pump starting condition is met. And returning to the step of controlling the gas water heater to be started for heating according to the water flow signal.
Specifically, when the main control device obtains satisfying the water pump starting condition in the analysis, will control the water pump and open the operation, under the effect of water pump, originally the water of quiescence in gas heater water system will take place to flow, circulates in gas heater. Because the water flows, the flow collector can detect a water flow signal, at the moment, the gas water heater can execute the same operation as that when a user uses hot water, namely, a burner and the like are started to heat the water flowing through the heat exchanger, so that the water temperature shock cooling when the user uses water again is avoided.
Referring to fig. 2, in an embodiment, the method for controlling a gas water heater further includes step S400 and step S500.
Step S400, when a zero cold water mode instruction is received, controlling a water pump to be started and operated, and controlling a gas water heater to be started for heating according to a water flow signal; and S500, controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater.
Specifically, the outlet water temperature is collected and sent by an outlet water temperature collector arranged on an outlet water pipeline of the gas water heater. The zero cold water mode is a working mode that the water in the water supply system of the gas water heater is kept warm by circulating heating, and hot water can be directly obtained when a user supplies water. The main control device can enter a zero cold water state according to a zero cold water mode instruction sent by a user, and the circulating heating operation of water in the water system of the gas water heater is realized. If the start and stop of pipeline circulation are judged by detecting the return water temperature, the problem that the difference between the set temperature and the outlet water temperature is large is caused by always heating the water flowing through the heat exchanger, the outlet water temperature is higher than the set temperature, and the problem that a user is scalded easily is caused. According to the technical scheme in the embodiment, the circulating start and stop of the zero-cold water pipeline is judged by detecting the water temperature, so that the problem that the water outlet temperature is inconsistent with the set temperature after circulation is finished is avoided.
Similarly, the zero cold water mode command is not sent only, but in one embodiment, the zero cold water mode command can be implemented by using a touch display device similar to the above-mentioned bathing mode power-on command. In other embodiments, the method can also be realized by mechanical keys or voice instructions and the like.
Referring to fig. 3, in an embodiment, the step of controlling the gas water heater to be turned on for heating according to the water flow signal includes step S110, step S120 and step S130.
Step S110, when a water flow signal is detected, a fan of the gas water heater is started at a first preset rotating speed to clean the gas water heater, and whether an air duct of the gas water heater is blocked is detected; step S120, when the air channel is not blocked, controlling the fan to reduce to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to be opened for ignition; step S130, if flame is detected within a first preset time, the gas water heater is kept on to operate.
Specifically, referring to fig. 4, when the user opens the faucet, the flow collector detects a water flow signal, and the main control device controls the fan to start at a first preset rotation speed to perform forward cleaning and simultaneously determine whether the air duct is blocked, so as to prepare for subsequent combustion operations. It will be appreciated that in order to achieve rapid ignition, save on start-up time, the duration of the determination of whether a blockage has occurred in the passage should be as small as possible. In a possible embodiment, the continuous implementation of judging whether the channel is blocked may be set to 2 seconds, and if the channel is not blocked within two seconds, the gas water heater is considered to be normally operated, and then the subsequent ignition heating operation is performed. When this embodiment adopts the fan start to clean, realize the judgement that whether the passageway takes place to block up, can also save the boot time effectively, reduce cold water and just flow through gas heater not heating.
Also, in order to ensure that the gas water heater rapidly enters a state of heating cold water, the cleaning operation should be rapidly completed. Therefore, when the fan is turned on, the fan should be turned on and operated at a relatively high rotation speed as much as possible, that is, the first preset rotation speed should be set to be sufficiently high.
When the main control device does not detect that the air duct is blocked, the fan does not need to operate at a higher rotating speed in order to save energy, and therefore the main control device can control the fan to operate at a lower second preset rotating speed. Meanwhile, the main control device controls the gas proportional valve and the gas sectional valve to be opened, so that an external gas source can convey gas to the combustor through the gas conveying pipeline to prepare for combustion and heating. Meanwhile, the main control device sends a pulse signal to the pulse igniter to realize ignition operation, so that the burner is started to operate, and cold water flowing through the burner is heated through the heat exchanger.
Further, in one embodiment, if the main control device detects that the channel is blocked within two seconds, the cold water heating operation cannot be continued, and at this time, the information prompting device connected with the main control device outputs the fault prompting information to inform the user.
It can be understood that, in order to ensure that the pulse igniter can normally operate, after the main control device sends a pulse signal to the pulse igniter for ignition, whether flame is generated or not, that is, whether ignition is successful or not, is further detected. The method is realized by detecting whether flame is generated at the corresponding position of the burner within the first preset time period. The magnitude of the first preset time period is not exclusive, and may be set differently according to the sensitivity of the pulse igniter and the like, for example, in one embodiment, the first preset time period may be set to 3 seconds. It should be noted that the specific flame detection method is not exclusive and may be implemented by image acquisition or temperature detection. If the main control device detects that the flame is generated, the ignition is successful, at the moment, the gas water heater normally operates, and the main control device only needs to maintain the current state, so that the cold water heating operation can be realized.
Referring to fig. 3, in an embodiment, after the step S120, the method further includes a step S140 and a step S150.
Step S140, if flame is not detected within a first preset time, judging whether secondary ignition is needed; and S150, closing the gas proportional valve and the gas sectional valve when the secondary ignition is not needed, and outputting fault prompt information. And when secondary ignition is needed, returning to control the fan to reduce to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to open for ignition.
Specifically, referring to fig. 4, when the main control device detects a flame, a situation that the flame is not detected, that is, the ignition fails, may occur, and the cold water heating operation may not be performed. At this time, the main control device will determine whether a secondary ignition operation is required, and the specific implementation manner is to determine whether a secondary ignition instruction sent by a user is received. That is to say, in one embodiment, when the main control device does not detect flame, the main control device informs the user of such a situation through an information prompting device such as a touch display device, and the user analyzes whether secondary ignition is required or not according to the user's own requirements, and if so, the user issues a secondary ignition instruction through the touch display device and the like, returns to control the fan to reduce to the second preset rotating speed, and controls the gas proportional valve and the gas sectional valve of the gas water heater to be opened for ignition operation, so as to realize secondary ignition. If the user does not have the secondary ignition requirement, the user does not send a secondary ignition instruction to the main control device or send a signal which does not need secondary ignition to the main control device, namely the main control device obtains an analysis result which does not need secondary ignition, and at the moment, the main control device also sends fault prompt information to the user.
Referring to fig. 3, in an embodiment, after the step S130, the method further includes a step S160.
And step S160, acquiring the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater, and adjusting the gas proportional valve and the gas sectional valve.
Specifically, referring to fig. 4, when the gas water heater is successfully ignited and the heating operation of the inflow cold water is realized, the main control device further analyzes the water inlet temperature and the water outlet temperature of the gas water heater, adjusts the opening degrees of the gas proportional valve and the gas segment valve of the gas water heater, controls the burner at the corresponding position to burn, and controls the combustion amount to heat the water temperature to the state required by the user.
Referring to fig. 5, in one embodiment, step S200 includes step S210, step S220, and step S230; the corresponding step S300 includes step S310.
Step S210, when the water flow signal disappears and the disappearance duration reaches a second preset duration, judging whether the water inlet temperature of the gas water heater is smaller than a first preset temperature or not; step S220, when the water inlet temperature is lower than a first preset temperature, generating a water pump starting control signal; and step S230, judging whether the water pump starting control signal is generated for the first time. And step S310, when the water pump starting control signal is generated for the first time, controlling the water pump to be started according to the water pump starting control signal. And returning to the step of controlling the gas water heater to be started for heating according to the water flow signal.
Specifically, referring to fig. 4, in the operation process of the gas water heater of the present embodiment, the water flow detection operation is performed in real time, if the water flow signal exists, it indicates that the gas water heater is in a normal operation state, and if the water flow signal disappears, it indicates that the water demand for the gas water heater is closed. In order to ensure the reliability of the detection result of detecting that the user stops using water, the embodiment considers that the user stops using water only when the duration of the disappearance of the water flow signal reaches the second preset duration. If the water flow signal is detected again within the second preset time, the user is considered not to stop using water, and at the moment, the gas water heater is only controlled to enter a standby state.
It should be noted that the size of the second preset time period is not exclusive, and different settings can be specifically made in combination with the use scenario of the gas water heater. For example, in one embodiment, the second predetermined time period may be set to 10 seconds, that is, if the main control device does not receive the water flow signal for 10 seconds, the main control device may consider that the user stops using water.
Further, after detecting that the user stops using water, the water pump is not immediately started to control water circulation and heat the water, but the water is further analyzed according to the water inlet temperature, at the moment, the main control device acquires the water inlet temperature in real time and compares and analyzes the water inlet temperature with the first preset temperature, and the water pump is started to heat the water only when the water inlet temperature is reduced to a certain degree.
Furthermore, in order to avoid frequent start and stop of the water pump, when the inlet water temperature is detected to be lower than the first preset temperature, the water pump does not need to be started to perform water circulation heating every time. In this embodiment, when it is detected that the water flow signal disappears for the second preset time and the water inlet temperature is lower than the first preset temperature, it is further determined whether the water pump is started for water circulation before, if the water pump start control signal is generated by the main control device before, the water pump is considered to be started, the main control device generates the water pump start control signal for the first time, which is equal to the first start of the water pump, and the water pump start determination is performed. If the water pump is started before, the water flow signal is still detected to disappear for the second preset time and the water inlet temperature is lower than the first preset temperature, the requirement that the user does not use the gas water heater is represented, at the moment, the water pump directly enters a standby state, stops running, and finishes the circulating heating operation of water, so that the water pump is prevented from being frequently started when the water pump is not used, and the water heater is always in a working state. That is to say, in this embodiment, only when the water flow signal is detected to disappear for the second preset time and the water inlet temperature is lower than the first preset temperature for the first time, the water pump is controlled to be turned on according to the start control signal, and even if the water pump start control signal is generated by detecting the state for the second time and later, the water pump is not turned on again.
And when the water flow signal disappears for a second preset time and the water inlet temperature is lower than the first preset temperature for the first time, the water pump starting condition is considered to be met at the moment. The main control device controls the water pump to be started according to the generated water pump starting control signal, so that the gas water heater performs water circulation, and meanwhile, the operation of controlling the gas water heater to be started for heating according to the water flow signal is returned, so that the water temperature is increased.
Referring to fig. 6, in one embodiment, step S500 includes step S510 and step S520.
Step S510, judging whether the water inlet temperature of the gas water heater is higher than a first preset temperature or not and whether the water outlet temperature of the gas water heater is higher than a second preset temperature or not; and step S520, controlling the water pump to stop running when the water inlet temperature is higher than the first preset temperature and the water outlet temperature is higher than the second preset temperature.
Specifically, please refer to fig. 7, in the zero cold water operation mode, during the process of circularly heating the gas water heater, the main control device obtains the water inlet temperature and the water outlet temperature in real time for analysis, and when the water inlet temperature is higher than the first preset temperature and the water outlet temperature is higher than the second preset temperature, the conditions are met at the same time, it is indicated that the water temperature has reached the requirement, and in order to save energy, the water temperature is also prevented from being too high, and at this time, the water pump is directly controlled to stop operating. It can be understood that under the condition that the water temperature is higher than the first preset temperature and the water outlet temperature is higher than the second preset temperature and is not simultaneously met, the water temperature does not reach the requirement of zero cold water heating, and at the moment, the main control device controls the gas water heater to maintain combustion heating.
It should be noted that the first preset temperature and the second preset temperature are not only in magnitude, and in one embodiment, the first preset temperature may be set to 30 ℃, and the second preset temperature may be increased by 2 ℃ based on the water temperature required by the user, i.e. T is set to +2 ℃, wherein T is set to the water temperature required by the user for water.
Referring to fig. 6, in an embodiment, after step S520, the method further includes step S530.
Step S530, acquiring the water inlet temperature in real time and comparing and analyzing the water inlet temperature with a third preset temperature; and when the inlet water temperature is lower than the third preset temperature, returning to the step of controlling the water pump to start to operate.
Specifically, the third preset temperature is less than the second preset temperature. Referring to fig. 7, after the water pump stops operating, the main control device may analyze the water inlet temperature and the third preset temperature in real time, and turn on the water pump again when the water inlet temperature is low, and perform an operation of controlling the gas water heater to be turned on for heating according to the water flow signal, so as to increase the water temperature. Otherwise, when the inlet water temperature is higher, the water pump is kept to stop running. Likewise, the third preset temperature is not limited to only one, and in one embodiment, the third preset temperature may be reduced by 3 ℃ based on the water temperature required by the user, i.e. T is-3 ℃, wherein T is the water temperature required by the user.
According to the control method of the gas water heater, when a user uses the gas water heater for bathing, the gas water heater is controlled to be started for heating according to the detected water flow signal, and hot water is provided for the user. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
Referring to fig. 8, a control device for a gas water heater includes: a bathing mode starting module 100, a water pump starting analysis module 200 and a water pump starting control module 300.
The bathing mode starting module 100 is used for controlling the gas water heater to be started for heating according to the water flow signal when receiving a bathing mode starting instruction; the water pump starting analysis module 200 is used for analyzing whether a water pump starting condition is met or not according to the water inlet temperature of the gas water heater when the fact that a user stops using water is detected; the water pump starting control module 300 is used for controlling the water pump to be started when the water pump starting condition is met; and controls the bathing mode starting module 100 to execute the operation of controlling the gas water heater to be started for heating according to the water flow signal.
Referring to fig. 9, in an embodiment, the gas water heater control device further includes: a zero cold water start module 400 and a water pump start-stop control module 500. The zero cold water starting module 400 is used for controlling the water pump to start and operate when receiving a zero cold water mode instruction, and controlling the gas water heater to start for heating according to a water flow signal; the water pump start-stop control module 500 is used for controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater.
In one embodiment, the bathing mode starting module 100 is further configured to start a fan of the gas water heater at a first preset rotation speed to clean the gas water heater when the water flow signal is detected, and detect whether an air duct of the gas water heater is blocked; when the air channel is not blocked, the fan is controlled to be reduced to a second preset rotating speed, and a gas proportional valve and a gas sectional valve of the gas water heater are controlled to be opened for ignition; and if flame is detected within the first preset time, the gas water heater is kept to be started to operate.
In one embodiment, the bathing mode enabling module 100 is further configured to determine whether a second ignition is required if no flame is detected within a first preset time period; and when secondary ignition is not needed, closing the gas proportional valve and the gas sectional valve, and outputting fault prompt information. And when secondary ignition is needed, returning to control the fan to reduce to a second preset rotating speed, and controlling the gas proportional valve and the gas sectional valve of the gas water heater to open for ignition.
In one embodiment, the bathing mode opening module 100 is further configured to obtain the inlet water temperature of the gas water heater and the outlet water temperature of the gas water heater, and adjust the gas proportional valve and the gas segment valve.
In one embodiment, the water pump start analysis module 200 is configured to determine whether the inlet water temperature of the gas water heater is less than a first preset temperature when it is detected that the water flow signal disappears and the disappearance duration reaches a second preset duration; when the inlet water temperature is lower than a first preset temperature, generating a water pump starting control signal; and judging whether the water pump starting control signal is generated for the first time. The water pump start control module 300 is configured to control the water pump to be started according to the water pump start control signal when the water pump start control signal is generated for the first time, and control the bathing mode start module 100 to execute an operation of controlling the gas water heater to be started for heating according to the water flow signal.
In one embodiment, the water pump start-stop control module 500 is further configured to determine whether the water inlet temperature of the gas water heater is greater than a first preset temperature, and whether the water outlet temperature of the gas water heater is greater than a second preset temperature; and when the water inlet temperature is higher than the first preset temperature and the water outlet temperature is higher than the second preset temperature, controlling the water pump to stop running.
In one embodiment, the water pump start-stop control module 500 is further configured to obtain the water inlet temperature in real time and compare the water inlet temperature with a third preset temperature, where the third preset temperature is lower than the second preset temperature. And when the inlet water temperature is lower than the third preset temperature, controlling the zero cold water starting module 400 to execute the operation of controlling the water pump to start and run.
For specific limitations of the gas water heater control device, reference may be made to the above limitations of the gas water heater control method, which are not described herein again. All or part of the modules in the gas water heater control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
According to the gas water heater control device, when a user uses the gas water heater to bath, the gas water heater is controlled to be started to heat according to the detected water flow signal, and hot water is provided for the user. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
Referring to fig. 10, a gas water heater control system includes a main control device (not shown), a flow collector 7 and a water inlet temperature collector 6, wherein the flow collector 7 and the water inlet temperature collector 6 are respectively disposed on a water inlet pipeline a of the gas water heater, the flow collector 7 and the water inlet temperature collector 6 are respectively connected to the main control device, and the main control device is configured to control operation of the gas water heater according to the above method.
Specifically, the water flow signal is collected and transmitted by a flow collector 7 provided in the water inlet pipe of the gas water heater. The gas water heater is provided with a main control device for receiving all parameters to realize the operation control of the gas water heater, and in the embodiment, when the main control device receives a bathing mode starting instruction, the main control device controls the gas water heater to enter a bathing mode to heat inflow cold water. The bathing mode is a mode that a user needs to directly use hot water, and in the bathing mode, hot water obtained by heating the gas water heater through the heat exchanger is provided for the user through a water outlet of the gas water heater. Therefore, in the bathing mode, cold water needs to be continuously fed in for heating, and then hot water is provided for the user.
The inlet water temperature is collected and sent by an inlet water temperature collector 6 arranged on the inlet water pipeline of the gas water heater. The water inlet temperature is the water temperature at the water inlet, when cold water flows in, the water temperature is the water temperature of the water, and when no water circulation or cold water flows in, the water inlet temperature is the temperature of the residual water at the water inlet. The user stops hot water, that is, no cold water flows into the gas water heater, and the combustion system of the corresponding gas water heater also stops running. Under this kind of state, if gas heater does not carry out hydrologic cycle heating, increase along with time, the inside remaining hot water temperature of water system that the gas heater is relevant will reduce gradually, when the user opens once more and uses hot water, can flow out partly cold water, influences user's water experience. The temperature of the water inlet department when this embodiment stops the water use state according to the user carries out the analysis, and when the temperature of intaking reached certain condition, main control unit can control gas heater's water pump 5 and open the operation, heats the inside water of whole gas heater water system, the condition of temperature quenching when avoiding appearing the user and using water once more.
The water system for the gas water heater is a system formed by a gas water heater control system, a gas water heater body and an external user pipeline, and in the water circulation mode, the check valve 13 is opened to enable water flowing out of the gas water heater to flow back to a water inlet of the gas water heater through a hot water pipeline such as a cold water pipeline and then through the cold water pipeline, so that water circulation is achieved.
When the main control device obtains the water pump starting condition through analysis, the water pump is controlled to be started to operate, and under the action of the water pump, water originally standing in a water system for the gas water heater flows to circulate in the gas water heater. Due to the flowing of water, the flow collector 7 can detect a water flow signal, at the moment, the gas water heater can perform the same operation as that when a user uses hot water, namely, a burner and the like are started to heat water flowing through the heat exchanger, so that the water temperature is prevented from being quenched when the user uses water again.
Referring to fig. 10, in an embodiment, the gas water heater control system further includes an outlet water temperature collector 11, and the outlet water temperature collector 11 is disposed in the outlet pipe of the gas water heater and connected to the main control device.
Specifically, the zero-cold-water mode is a working mode in which water in a water supply system of the gas water heater is kept warm by circulating heating, and hot water can be directly obtained when a user supplies water. The main control device can enter a zero cold water state according to a zero cold water mode instruction sent by a user, and the circulating heating operation of water in the water system of the gas water heater is realized. If the start and stop of pipeline circulation are judged by detecting the return water temperature, the problem that the difference between the set temperature and the outlet water temperature is large is caused by always heating the water flowing through the heat exchanger, the outlet water temperature is higher than the set temperature, and the problem that a user is scalded easily is caused. According to the technical scheme in the embodiment, the circulating start and stop of the zero-cold water pipeline is judged by detecting the water temperature, so that the problem that the water outlet temperature is inconsistent with the set temperature after circulation is finished is avoided.
Referring to fig. 10, in an embodiment, the gas water heater control system further includes a constant temperature water tank 8, and the constant temperature water tank 8 is disposed between the water outlet pipeline D of the gas water heater and the water pipeline C of the external user.
Specifically, the problem of fluctuation of water temperature caused by multiple points of water use and fluctuation of water pressure is solved by providing the constant temperature water tank 8. The specific principle is as follows: when the gas water heater works normally, the temperature of hot water flowing out of the heat exchanger of the gas water heater is consistent with the temperature of water in the constant-temperature water tank 8; when the temperature of the water flowing out of the heat exchanger of the gas water heater rises or falls, the temperature difference is generated between the water and the water in the constant-temperature water tank 8; when water flows into the constant temperature water tank 8, the temperature of the water flowing into the constant temperature water tank 8 is reduced or increased by utilizing the heat convection of cold water and hot water, so that the water flowing out of the heat exchanger of the gas water heater and the water in the constant temperature water tank 8 are fully mixed, and the temperature of the water finally flowing out of the water outlet pipe of the water heater is basically kept unchanged. Thereby avoiding the problem of large fluctuation range of the outlet water temperature of the water heater caused by multi-point water consumption and water pressure fluctuation.
According to the gas water heater control system, when a user uses the gas water heater to bath, the gas water heater is controlled to be started to heat according to the detected water flow signal, and hot water is provided for the user. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
A gas water heater comprises the gas water heater control system.
Specifically, the gas water heater control system is configured as shown in the above embodiments, and the water flow signal is collected and transmitted by the flow collector 7 disposed in the water inlet pipeline of the gas water heater. The gas water heater is provided with a main control device for receiving all parameters to realize the operation control of the gas water heater, and in the embodiment, when the main control device receives a bathing mode starting instruction, the main control device controls the gas water heater to enter a bathing mode to heat inflow cold water. The bathing mode is a mode that a user needs to directly use hot water, and in the bathing mode, hot water obtained by heating the gas water heater through the heat exchanger is provided for the user through a water outlet of the gas water heater. Therefore, in the bathing mode, cold water needs to be continuously fed in for heating, and then hot water is provided for the user.
The inlet water temperature is collected and sent by an inlet water temperature collector 6 arranged on the inlet water pipeline of the gas water heater. The water inlet temperature is the water temperature at the water inlet, when cold water flows in, the water temperature is the water temperature of the water, and when no water circulation or cold water flows in, the water inlet temperature is the temperature of the residual water at the water inlet. The user stops hot water, that is, no cold water flows into the gas water heater, and the combustion system of the corresponding gas water heater also stops running. Under this kind of state, if gas heater does not carry out hydrologic cycle heating, increase along with time, the inside remaining hot water temperature of water system that the gas heater is relevant will reduce gradually, when the user opens once more and uses hot water, can flow out partly cold water, influences user's water experience. The temperature of the water inlet department when this embodiment stops the water use state according to the user carries out the analysis, and when the temperature of intaking reached certain condition, master control set can control gas heater's water pump and open the operation, heats the inside water of whole gas heater water system, and the condition of temperature quenching when avoiding appearing the user and using water once more.
The water system for the gas water heater is a system formed by a gas water heater control system, a gas water heater body and an external user pipeline, and in the water circulation mode, the check valve 13 is opened to enable water flowing out of the gas water heater to flow back to a water inlet of the gas water heater through a hot water pipeline such as a cold water pipeline and then through the cold water pipeline, so that water circulation is achieved.
When the main control device obtains the water pump starting condition through analysis, the water pump is controlled to be started to operate, and under the action of the water pump, water originally standing in a water system for the gas water heater flows to circulate in the gas water heater. Due to the flowing of water, the flow collector 7 can detect a water flow signal, at the moment, the gas water heater can perform the same operation as that when a user uses hot water, namely, a burner and the like are started to heat water flowing through the heat exchanger, so that the water temperature is prevented from being quenched when the user uses water again.
According to the gas water heater, when a user uses the gas water heater to take a bath, the gas water heater is controlled to be started to heat according to the detected water flow signal, and hot water is provided for the user. In addition, in the bathing process, if the fact that the user stops using water is detected, the gas water heater does not simply enter a standby state, and analysis is carried out in real time according to the water temperature (namely the water inlet temperature) at the water inlet of the gas water heater. When a certain condition is met, the water pump is started to enable water in the gas water heater to circulate and simultaneously be started to heat. Through this scheme, can circulate when the user stops to use water and heat water, when avoiding the user to use water again, the condition of temperature quenching appears, guarantees that the user maintains the temperature of water stable in the use.
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 claims. 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 (12)
1. A method of controlling a gas water heater, comprising:
when a bathing mode starting instruction is received, controlling the gas water heater to be started for heating according to a water flow signal;
when the fact that a user stops using water is detected, whether a water pump starting condition is met or not is analyzed according to the water inlet temperature of the gas water heater;
when the water pump starting condition is met, controlling the water pump to be started and returning to the step of controlling the gas water heater to be started for heating according to the water flow signal;
when a zero cold water mode instruction is received, controlling a water pump to be started and operated, and controlling a gas water heater to be started for heating according to a water flow signal;
and controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater, wherein the water outlet temperature is collected and sent by a water outlet temperature collector arranged on a water outlet pipeline of the gas water heater.
2. The method for controlling the gas water heater according to claim 1, wherein the step of controlling the gas water heater to be turned on for heating according to the water flow signal comprises the steps of:
when a water flow signal is detected, a fan of the gas water heater is started at a first preset rotating speed to clean the gas water heater, and whether an air duct of the gas water heater is blocked is detected;
when the air channel is not blocked, controlling the fan to be reduced to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to be opened for ignition;
and if flame is detected within the first preset time, the gas water heater is kept to be started to operate.
3. The method for controlling the gas water heater according to claim 2, wherein after the step of controlling the fan to decrease to the second preset rotation speed and controlling the gas proportional valve and the gas sectional valve of the gas water heater to open for ignition when the air duct is not blocked, the method further comprises:
if the flame is not detected within the first preset time, judging whether secondary ignition is needed;
when secondary ignition is needed, returning to the step of controlling the fan to reduce to a second preset rotating speed, and controlling a gas proportional valve and a gas sectional valve of the gas water heater to open for ignition;
and when secondary ignition is not needed, closing the gas proportional valve and the gas sectional valve, and outputting fault prompt information.
4. The method for controlling a gas water heater according to claim 2, wherein after the step of maintaining the gas water heater in operation if the flame is detected within the first preset time period, the method further comprises:
and acquiring the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater to adjust the gas proportional valve and the gas sectional valve.
5. The gas water heater control method according to claim 1, wherein the step of controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater comprises:
judging whether the water inlet temperature of the gas water heater is higher than a first preset temperature or not and whether the water outlet temperature of the gas water heater is higher than a second preset temperature or not;
and when the water inlet temperature is higher than a first preset temperature and the water outlet temperature is higher than a second preset temperature, controlling the water pump to stop running.
6. The gas water heater control method according to claim 5, further comprising, after the step of controlling the water pump to stop operating:
acquiring the water inlet temperature in real time and comparing and analyzing the water inlet temperature with a third preset temperature, wherein the third preset temperature is lower than the second preset temperature;
and returning to the step of controlling the water pump to start to operate when the inlet water temperature is lower than a third preset temperature.
7. The gas water heater control method according to claim 1, wherein the step of analyzing whether the water pump opening condition is satisfied according to the inlet water temperature of the gas water heater when it is detected that the user stops using water comprises:
when the water flow signal disappears and the disappearance time reaches a second preset time, judging whether the water inlet temperature of the gas water heater is lower than a first preset temperature or not;
when the inlet water temperature is lower than a first preset temperature, generating a water pump starting control signal;
judging whether the water pump starting control signal is generated for the first time;
when the water pump opening condition is met, the step of controlling the water pump to be opened and returning to control the gas water heater to be opened for heating according to the water flow signal comprises the following steps of:
and when the water pump starting control signal is generated for the first time, controlling the water pump to be started according to the water pump starting control signal and returning to the step of controlling the gas water heater to be started for heating according to the water flow signal.
8. A gas water heater control device, comprising:
the bathing mode starting module is used for controlling the gas water heater to be started for heating according to the water flow signal when receiving the bathing mode starting instruction;
the water pump starting analysis module is used for analyzing whether a water pump starting condition is met or not according to the water inlet temperature of the gas water heater when the fact that a user stops using water is detected;
the water pump starting control module is used for controlling the water pump to be started and controlling the bathing mode starting module to execute the operation of controlling the gas water heater to be started for heating according to the water flow signal when the water pump starting condition is met;
the zero cold water starting module is used for controlling the water pump to be started and operated when receiving a zero cold water mode instruction, and controlling the gas water heater to be started for heating according to a water flow signal;
and the water pump start-stop control module is used for controlling the start and stop of the water pump according to the water inlet temperature of the gas water heater and the water outlet temperature of the gas water heater, and the water outlet temperature is collected and sent by a water outlet temperature collector arranged on a water outlet pipeline of the gas water heater.
9. A gas water heater control system is characterized by comprising a main control device, a flow collector and a water inlet temperature collector, wherein the flow collector and the water inlet temperature collector are respectively arranged on a water inlet pipeline of a gas water heater, the flow collector and the water inlet temperature collector are respectively connected with the main control device, and the main control device is used for controlling the operation of the gas water heater according to the method of any one of claims 1-7.
10. The gas water heater control system according to claim 9, further comprising an outlet water temperature collector, wherein the outlet water temperature collector is arranged in an outlet pipe of the gas water heater and connected with the main control device.
11. The gas water heater control system of claim 9, further comprising a constant temperature water tank disposed between the water outlet line of the gas water heater and the external user water line.
12. A gas water heater comprising a gas water heater control system according to any one of claims 9-11.
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| CN113175752B (en) * | 2021-04-08 | 2022-06-10 | 海信(广东)厨卫系统股份有限公司 | Filter screen filth blockage detection method for gas heating equipment |
| CN113357821A (en) * | 2021-04-30 | 2021-09-07 | 华帝股份有限公司 | Control method of water heater |
| CN114234453B (en) * | 2021-09-26 | 2023-03-07 | 华帝股份有限公司 | Fluctuating temperature control method of gas water heater and gas water heater |
| CN113883725B (en) * | 2021-10-28 | 2022-10-11 | 宁波方太厨具有限公司 | Water heater start-stop control method, water heater and readable storage medium |
| CN113983696B (en) * | 2021-11-24 | 2023-03-10 | 华帝股份有限公司 | Gas water heater and control method thereof |
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