Water heating device and control method and control device thereof

Abstract

The embodiment of the invention provides a water heating device and a control method and device thereof. The control method of the water heating device comprises the steps that a water level signal generated by a water level sensor is periodically obtained, and whether the water level of a water tank is in a descending state or not is determined according to the water level signal; when it is determined that the water level of the water tank is in the descending state, the heater is controlled to heat flowing-through outlet water flow; and when it is determined that the water level of the water tank is not in the falling state, the heater is controlled to stop heating. Whether the water level is in a descending state or not is detected through the multiplex water level sensor, whether the water outlet pipeline has water outlet flow or not is determined, and an impeller and a corresponding rotating speed encoder do not need to be arranged in the water outlet pipeline.

Description

Technical Field

[0001] The present disclosure relates to the technical field of household appliances, and specifically provides a water heating device and a control method and a control device thereof. Background Art

[0002] Household appliances such as sweeping robot base stations use instant water heating devices, that is, a heater is used to heat the water flowing through. In order to avoid dry-burning damage to the heater, the aforementioned water heating device needs to detect whether there is water flowing through the heater. In order to be able to detect the flow of water, the existing water heating device is provided with an impeller in the water outlet pipe, and the heater is controlled to stop heating when the impeller speed is zero, so as to avoid the problem of dry-burning damage to the heater. However, the aforementioned provision of an impeller and a corresponding speed encoder in the water outlet pipe increases the system cost, and in small household appliances such as sweeping robot base stations where size is prioritized, because the installation space of the sewer pipe is severely limited, the provision of an impeller in the sewer pipe further increases the difficulty of laying the sewer pipe. Summary of the invention

[0003] In order to solve the above technical problems, the embodiments of the present disclosure provide a water heating device and a control method and a control device thereof.

[0004] In a first aspect, an embodiment of the present disclosure provides a control method for a water heating device, wherein the water heating device comprises a water tank and a water outlet pipe, wherein a water level sensor is disposed in the water tank, and wherein a heater is disposed in the water outlet pipe; the method comprises:

[0005] Periodically acquiring a water level signal generated by a water level sensor, and determining whether the water level of the water tank is in a decreasing state according to the water level signal;

[0006] When it is determined that the water level of the water tank is in a falling state, the heater is controlled to heat the outlet water flow passing through; and when it is determined that the water level of the water tank is not in a falling state, the heater is controlled to stop heating.

[0007] Optionally, the water heating device further comprises a water injection pipeline;

[0008] Before determining whether the water level of the water tank is in a decreasing state according to the water level signal, the method further includes:

[0009] Determining whether the water level of the water tank reaches a preset water level according to the water level signal;

[0010] When the water level of the water tank does not reach the preset water level, the water outlet pipeline is controlled to stop discharging water and water is injected into the water tank through the water injection pipeline;

[0011] When it is determined according to the water level signal that the water level of the water tank reaches the preset water level, controlling the water filling pipeline to stop filling water into the water tank, and controlling the water outlet pipeline to discharge water;

[0012] Determining whether the water level of the water tank is in a decreasing state according to the water level signal includes: determining whether the water level of the water tank is in a decreasing state according to the water level signal while controlling the water outlet pipeline to discharge water.

[0013] Optionally, the control method of the water heating device further includes: when it is determined that the water level of the water tank is not in a decreasing state, controlling the water outlet pipeline to stop discharging water.

[0014] Optionally, when it is determined that the water level in the water tank is in a decreasing state, the method further includes:

[0015] Determine the water flow rate per unit time of the water outlet pipeline according to the water level signal;

[0016] Controlling the heating power of the heater according to the water flow rate per unit time;

[0017] The controlling the heater to heat the outlet water flow passing through includes: controlling the heater to heat the outlet water flow passing through according to the heating power.

[0018] Optionally, determining the water flow rate per unit time of the water outlet pipeline according to the water level signal includes:

[0019] Determine the speed at which the water level drops according to the water level signal;

[0020] The water flow rate per unit time of the water outlet pipeline is determined according to the water level drop speed.

[0021] Optionally, the method further comprises: determining a target water outlet temperature;

[0022] The controlling the power interval of the heater according to the water flow rate per unit time includes: determining the heating power according to the water flow rate per unit time and the target water outlet temperature.

[0023] Optionally, the water outlet pipeline further includes a temperature sensor arranged at the outlet end of the heater;

[0024] While controlling the heater to heat the outlet water flow according to the heating power, the method further includes: acquiring the real-time water flow temperature detected by the temperature sensor;

[0025] The working state of the heater is adjusted according to the real-time water flow temperature and the target water outlet temperature.

[0026] Optionally, the target outlet water temperature is a temperature range;

[0027] The step of adjusting the working state of the heater according to the real-time water flow temperature and the target outlet water temperature includes:

[0028] When the real-time water flow temperature is lower than the lower limit of the temperature range, controlling the heater to return from the pause state to the heating state, or increasing the heating power of the heater; and

[0029] When the real-time water flow temperature is greater than the upper temperature limit of the temperature range, the heater is controlled to switch from the heating state to the pause state, or the heating power of the heater is reduced.

[0030] In a second aspect, an embodiment of the present disclosure provides a control device for a water heating device, wherein the water heating device comprises a water tank and a water outlet pipe, wherein a water level sensor is disposed in the water tank, and wherein a heater is disposed in the water outlet pipe; the device comprises:

[0031] A judging unit, used for periodically acquiring a water level signal generated by a water level sensor, and determining whether the water level of the water tank is in a decreasing state according to the water level signal;

[0032] The control unit is used to control the heater to continue heating the outlet water flow when it is determined that the water level of the water tank is in a falling state; and to control the heater to stop heating when it is determined that the water level of the water tank is not in a falling state.

[0033] In a third aspect, an embodiment of the present disclosure provides a water heating device, including a controller, a water tank, a water outlet pipeline, a water level sensor and a heater;

[0034] The water level sensor is arranged in the water tank and is used to generate a water level signal according to the periodically detected water level height;

[0035] The heater is arranged in the water outlet pipeline and is used to heat the water outlet flowing through the pipeline;

[0036] The controller is used to control the working state of the heater according to the water level signal generated by the water level sensor in accordance with the control method of the water heating device as described above.

[0037] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0038] By adopting the solution provided by the embodiment of the present disclosure, it is determined whether the water level in the water tank is in a falling state according to the water level signal generated by the water level sensor, and the working state of the heater is controlled according to whether the water level in the water tank is in a falling state, so as to avoid dry burning of the heater. In conventional applications, a water level sensor is often set in the water tank of the water heating device. By reusing the water level sensor to detect whether the water level is in a falling state, it is determined whether there is water flow in the water outlet pipeline, and there is no need to set an impeller and a corresponding speed encoder in the water outlet pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, including:

[0041] Figure 1 is a schematic structural diagram of a water heating device provided in an embodiment of the present disclosure;

[0042] Figure 2 is a flow chart of a control method for a water heating device provided by an embodiment of the present disclosure;

[0043] Figure 3 is a flow chart of a control method for a water heating device provided by some other embodiments of the present disclosure;

[0044] Figure 4 is a flow chart of a control method for a water heating device provided in some further embodiments of the present disclosure;

[0045] Figure 5 It is a schematic diagram of the structure of a control device of a water heating device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0047] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the processes performed by these devices, modules or units.

[0048] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0049] In order to solve the problem that the installation of an impeller and a corresponding speed encoder in a downpipe increases the cost of the water heating device, and the installation in a small-sized household appliance increases the difficulty of laying the downpipe, the embodiments of the present disclosure provide a new control method, control device and water heating device for a water heating device, which determines whether water flows in the downpipe by using other parameters, and then determines whether to control the heater for heating. The water heating device provided by the embodiments of the present disclosure can be installed in a robot vacuum cleaner base station or a washing and sweeping machine to generate hot water for washing the mop of the vacuum cleaner.

[0050] Before analyzing the control method of the water heating device provided in the embodiment of the present disclosure, a simple analysis is first made on the structure of the water heating device described in the embodiment of the present disclosure to facilitate understanding of the implementation principle of the control method of the water heating device.

[0051] Figure 1 Schematic diagram of the structure of the water heating device provided by the embodiment of the present disclosure. Figure 1 As shown, the water heating device provided by the embodiment of the present disclosure includes a water tank 101 and a water outlet pipeline 102 .

[0052] The height of the water tank 101 is at least higher than the water outlet of the water outlet pipe 102. A water level sensor 103 is arranged in the water tank 101, and the water level sensor 103 can periodically detect the water level of the water tank 101, generate a water level signal, and send the water level signal to the controller. A heater 104 is arranged in the water outlet pipe 102, and the heater 104 heats the outlet water flow flowing through. In a specific implementation, the controller determines the corresponding control strategy when processing the water level signal, and uses the corresponding control strategy to control the control state of the heater 104.

[0053] like Figure 1As shown, in the embodiment of the present disclosure, in order to control the leakage of the water outlet pipeline 102, a cut-off control component 105 is also provided in the water outlet pipeline 102. In practical applications, the cut-off control component 105 can be a cut-off valve, or a component that can achieve a cut-off function, such as a peristaltic pump. In particular, when the water flow of the water tank 101 is discharged through the water outlet pipeline 102 by gravity, the cut-off control component 105 can be a cut-off valve; when the vertical water flow is discharged through the water outlet pipeline 102 by external force, the cut-off control component 105 can be a peristaltic pump.

[0054] In addition, in some embodiments of the present disclosure, a temperature sensor 106 is further provided at the outlet of the heater 104 of the water outlet pipe 102. The temperature sensor 106 can detect the temperature of the water flow passing through, generate a temperature signal, and send the temperature signal to the controller. How the specific controller uses the temperature signal will be analyzed later.

[0055] In the disclosed embodiment, in addition to discharging the stored water in the water tank 101 through the water outlet pipe 102 , water also needs to be injected into the water tank 101 . For this purpose, the water heating device 100 also needs to be provided with a water inlet pipe 107 and a corresponding water inlet control component 108 .

[0056] The control method of the water heating device provided in the embodiment of the present disclosure is analyzed below. Figure 2 : is a flow chart of the control method of the water heating device provided by the embodiment of the present disclosure. Figure 2 As shown, the control method of the water heating device provided by the embodiment of the present disclosure includes S110 to S130. The control method of the water heating device provided by the embodiment of the present disclosure is executed by a controller in the water heating device.

[0057] S110: periodically obtain the water level signal generated by the water level sensor, and determine whether the water level of the water tank is in a decreasing state according to the water level signal; if so, execute S120; if not, execute S130.

[0058] S120: Control the heater to heat the outlet water flow.

[0059] S130: Control the heater to stop heating.

[0060] In the disclosed embodiment, the water level sensor periodically detects the water level in the water tank, generates a water level signal, and sends the water level signal to the controller. After receiving the water level signal generated by the water level sensor, the controller determines whether the water level of the water tank is in a falling state based on the water level signal in the subsequent cycle and the water level signal in the previous cycle. If it is determined that the water level of the water tank is in a falling state, the controller determines that the water flow in the water tank is flowing down, and there is an outlet water flow flowing through the heater. At this time, the heater can be controlled to continue to generate heat to achieve heating of the outlet water flow. If it is determined that the water level of the water tank is not in a falling state, it cannot be determined whether the water tank is in a downward discharge state at this time. In order to prevent the heater from stopping heating, the heater is controlled to stop heating at this time to avoid the problem of dry burning of the heater.

[0061] The control method of the water heating device provided by the example of the present disclosure is adopted to determine whether the water level in the water tank is in a falling state according to the water level signal generated by the water level sensor, and to control the working state of the heater according to whether the water level in the water tank is in a falling state, so as to avoid dry burning of the heater. In conventional applications, a water level sensor is often arranged in the water tank of the water heating device. By multiplexing the water level sensor to detect whether the water level is in a falling state, it is determined whether there is water flow in the water outlet pipeline, and there is no need to arrange an impeller and a corresponding speed encoder in the water outlet pipeline.

[0062] In addition, the water tank size of the water heating device is generally large. The water level sensor installed in the water tank can be used to determine whether there is water flow in the water outlet pipe, which fully utilizes the large size of the water tank and reduces the problem of insufficient layout space required to consider when installing an impeller in the water outlet pipe.

[0063] As analyzed above, the water heating device in the disclosed embodiment may further include a water injection pipeline, which is used to inject water into the water tank, and a water injection control component is provided in the water injection pipeline. In actual applications, when the water injection pipeline is directly connected to the municipal water pipe, the aforementioned water injection control component is an electrically controlled stop valve. A stop control component is provided in the water outlet pipeline. In the disclosed embodiment, in order to ensure that it can be determined whether water flows down through the water outlet pipeline based on the water level of the water tank, the water injection pipeline and the water outlet pipeline are not opened at the same time. When injecting water into the water tank, the water injection control component is controlled to be opened, and the stop control component is controlled to be closed. When discharging water from the water tank, the stop control component is controlled to be opened, and the water injection control component is controlled to be closed.

[0064] Based on the above structure, in a specific implementation, the control method of the water heating device needs to be improved based on the above basic method. Figure 3 1 is a flow chart of a control method for a water heating device provided by some other embodiments of the present disclosure. Figure 3 As shown, the control method of the water heating device in some other embodiments includes S210-S260.

[0065] S210: Obtain a water level signal generated by a water level sensor, and determine whether the water level in the water tank reaches a preset water level based on the water level signal; if not, execute S220; if so, execute S230.

[0066] S220: Control the water outlet pipeline to stop discharging water and control the water filling pipeline to fill water into the water tank, and continue to execute S210.

[0067] S230: Control the water filling pipeline to stop filling water into the water tank, and control the water outlet pipeline to discharge water.

[0068] In the embodiment of the present disclosure, before controlling the drainage through the water outlet pipe, the controller first determines whether the water level in the water tank has reached a preset water level according to the water level signal generated by the water level sensor. The preset water level is a water level indicating that there is more water in the water tank, and the preset water level can be a water level indicating that the water tank is full of water.

[0069] If it is determined that the water level in the water tank has not reached the preset water level, the control component can be shut down or stopped to control the water outflow through the water outlet pipe. Of course, the controller will not control the heater to perform the heating operation at this time, but will control the water injection into the water tank through the water injection pipe to increase the water level in the water tank. During this process, the water level sensor still periodically detects the water level signal, and the controller will continue to control the water outlet pipe to stop the water outflow and the water injection pipe to inject water according to the subsequent detected water level signal until the water level in the water tank reaches the preset water level.

[0070] After determining that the water level in the water tank reaches the target water level, the controller controls to stop filling the water tank through the water filling pipeline, and controls the cut-off control component to open, so as to drain the water from the water outlet pipeline. At this time, the controller can control the heater to turn on.

[0071] S240: Continue to periodically obtain the water level signal generated by the water level sensor, and determine whether the water level in the water tank is in a decreasing state based on the water level signal; if not, execute S250; if so, execute S260.

[0072] S250: Control the heater to stop heating.

[0073] S260: Control the heater to heat the outlet water flow.

[0074] The implementation process of S240-S260 is the same as that of the previous embodiment and will not be repeated here. For details, please refer to the previous description.

[0075] By adopting the method of the embodiment of the present disclosure, the cut-off control component is controlled to open and the heater is controlled to start heating only after the water level in the water tank reaches the target water level. In this way, heated water flow can be continuously generated through the water outlet pipe for a period of time to meet the needs of water use operations.

[0076] As analyzed above, in the embodiment of the present disclosure, when it is determined that the water level in the water tank is not in a declining state, it indicates that there is no water flow in the water outlet pipe. At this time, the cut-off component can be controlled to stop running, thereby closing the water outlet pipe.

[0077] Figure 4 1 is a flow chart of a control method for a water heating device provided in some embodiments of the present disclosure. Figure 4 As shown, in some embodiments, the control method of the water heating device may include 310-S350.

[0078] S310: Periodically obtain the water level signal generated by the water level sensor, and determine whether the water level of the water tank is in a decreasing state according to the water level signal; if so, execute S320; if not, execute S350.

[0079] S320: Determine the water flow rate per unit time of the water outlet pipeline according to the water level signal.

[0080] In the disclosed embodiment, after determining that the water level of the water tank is in a falling state according to the water level signal, it is determined that the water flow is flowing down through the water outlet pipe. Because the shape of the water tank has been determined, the change rate of the water level signal reflects the speed of the water in the water tank flowing down, that is, it reflects the water flow rate per unit time of the water outlet pipe. Therefore, the water flow rate per unit time of the primary tester can be determined according to the change rate of the water level signal.

[0081] In some embodiments, the water tank is a columnar water tank, and the cross-sectional area of ​​the water tank is known. After the water level drop speed is determined according to the water level signal, the water flow rate per unit time of the water outlet pipeline can be determined according to the water level drop speed and the cross-sectional area of ​​the water tank.

[0082] In a specific implementation, the aforementioned S320 may include S321 - S322 .

[0083] S321: Determine the speed at which the water level drops according to the water level signal.

[0084] S322: Determine the water flow rate per unit time of the water outlet pipeline according to the speed at which the water level drops.

[0085] The aforementioned S321-S322 determines the speed of water level drop according to the water level, and performs differential operation based on adjacent water level signals, that is, uses the difference of adjacent water level signals in the sampling period to obtain the speed of water level drop.

[0086] In some other embodiments, the water storage volume in the water tank corresponding to each water level signal is known. After the water level signal is determined, the water flow rate per unit time of the water outlet pipeline can be determined by subtracting the corresponding water storage volume in the water tank.

[0087] S330: Controlling the heating power of the heater according to the water flow rate per unit time.

[0088] In the disclosed embodiment, in order to heat the water flowing through the water outlet pipe to the target temperature, the heating power of the heater is proportional to the water flow rate per unit time. Therefore, the heating power of the heater can be determined according to the water flow rate per unit time. It should be noted that at this time, because the actual temperature of the water in the water tank is unknown, determining the heating power of the heater according to the water flow rate per unit time is only to determine a general heating power.

[0089] In some embodiments, the user may set a target outlet water temperature when using the heating device. In this case, S330 may specifically control the heating power of the heater according to the water flow rate per unit time: after determining the target outlet water temperature, determine the heating power according to the water flow rate per unit time and the target outlet water temperature.

[0090] S340: Controlling the heater to heat the outlet water flow according to the heating power.

[0091] After the heating power is determined, the heater is controlled to heat the outlet water flow as mentioned above, that is, the heater is controlled to heat the outlet water flow according to the heating power.

[0092] S350: Control the heater to stop heating.

[0093] By adopting the control method of the water heating device provided in the embodiment of the present invention, when it is determined according to the water level signal that the water level in the water tank is in a declining state, the heating power of the heater is determined according to the water level falling speed, and the outlet water flow heated by the heater is controlled according to the heating power, thereby realizing coarse control of the heating power of the heater.

[0094] As previously analyzed for the structure of the heating device, in some embodiments, a temperature sensor is also provided at the water outlet of the heater in the water outlet pipeline. Therefore, after executing S340, the controller may further execute S360-S370.

[0095] S360: Acquire the real-time water flow temperature detected by the temperature sensor.

[0096] In a specific implementation, the temperature sensor periodically detects the temperature of the water flowing through and generates a temperature signal. Correspondingly, the controller also periodically obtains the temperature signal generated by the temperature sensor to determine the real-time water temperature.

[0097] S370: Adjust the working state of the heater according to the real-time water flow temperature and the target water outlet temperature.

[0098] After determining the real-time water flow temperature, the controller can then adjust the operating state of the heater according to the real-time hydraulic temperature and the target water outlet temperature.

[0099] In some embodiments, the operating state of the heater is determined based on the real-time water flow temperature and the target water outlet temperature. The target water outlet temperature can be used as the control target, and a PI controller is used to determine the control strategy for the heater based on the real-time water flow temperature, and then the aforementioned control strategy is used to adjust the operating state of the heater.

[0100] In some other embodiments, the target outlet water temperature is a temperature range. The aforementioned adjustment of the working state of the heater according to the actual water flow temperature and the target outlet water temperature may include the following steps S371 and S372.

[0101] S371: When the real-time water flow temperature is less than the lower limit of the temperature range, the heater is controlled to return from the pause state to the heating state, or the heating power of the heater is increased.

[0102] S372: When the real-time water flow temperature is greater than the upper temperature limit of the temperature range, the heater is controlled to switch from the heating state to the pause state, or the heating power of the heater is reduced.

[0103] In addition to providing the aforementioned control method for a water heating device, the embodiment of the present disclosure also provides a control device for a water heating device. Figure 5 Schematic diagram of the structure of the control device of the water heating device provided by the embodiment of the present disclosure. Figure 5 As shown, the control device 500 of the water heating device includes a judgment unit 501 and a control unit 502 .

[0104] The judgment unit 501 is used to periodically obtain the water level signal generated by the water level sensor, and determine whether the water level of the water tank is in a falling state according to the water level signal. The control unit 502 is used to control the heater to continue heating the outlet water flow flowing through when it is determined that the water level of the water tank is in a falling state, and to control the heater to stop heating when it is determined that the water level of the water tank is not in a falling state.

[0105] In some embodiments, the water heating device further comprises a water injection pipeline;

[0106] Before determining whether the water level of the water tank is in a falling state according to the water level signal, the judgment unit 501 first determines whether the water level of the water tank has reached a preset water level according to the water level signal; when the water level of the water tank has not reached the preset water level, the control unit 502 controls the water outlet pipe to stop discharging water and controls the water injection into the water tank through the water injection pipe; when the judgment unit 501 determines that the water level of the water tank has reached the preset water level according to the water level signal, the control unit 502 controls the water injection pipe to stop injecting water into the water tank, and controls the water outlet pipe to discharge water; when the judgment unit 501 is open, the water level of the water tank is determined according to the water level signal whether the water level is in a falling state.

[0107] In some embodiments, when it is determined that the water level in the water tank is not in a decreasing state, the control unit 502 controls the water outlet pipeline to stop discharging water.

[0108] In some embodiments, when it is determined that the water level in the water tank is in a declining state, the control unit 502 determines the water flow rate per unit time of the water outlet pipeline according to the water level signal, controls the heating power of the heater according to the water flow rate per unit time, and then controls the heater to heat the outlet water flow according to the heating power.

[0109] In some embodiments, the control unit 502 determines the falling speed of the water level according to the water level signal, and then determines the water flow rate per unit time of the water outlet pipeline according to the falling speed of the water level.

[0110] In some embodiments, the control unit 502 first determines the target water outlet temperature, and then determines the heating power according to the water flow rate per unit time and the target water outlet temperature.

[0111] In some embodiments, the water outlet pipeline further includes a temperature sensor disposed at an outlet end of the heater;

[0112] While controlling the heater to heat the outlet water flow according to the heating power, the control unit 502 obtains the real-time water flow temperature detected by the temperature sensor, and then adjusts the working state of the heater according to the real-time water flow temperature and the target outlet water temperature.

[0113] In some embodiments, the target water outlet temperature is a temperature range; the control unit 502 adjusts the working state of the heater according to the real-time water flow temperature and the target water outlet temperature, specifically including: when the real-time water flow temperature is less than the lower temperature limit of the temperature range, controlling the heater to recover from the pause state to the heating state, or increasing the heating power of the heater; and, when the real-time water flow temperature is greater than the upper temperature limit of the temperature range, controlling the heater to switch from the heating state to the pause state, or reducing the heating power of the heater.

[0114] In addition to providing the aforementioned control method and control device for a water heating device, the embodiment of the present disclosure further provides a water heating device. The water heating device includes Figure 1 In addition to the structural components, the controller can control the working state of the heater according to the control method of the water heating device as described above according to the water level signal generated by the water level sensor.

[0115] In a specific implementation, the controller may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the water heating device to perform desired functions.

[0116] The embodiment of the present disclosure also provides a storage medium, the storage medium stores a program or instruction, the program or instruction enables a computer to execute any of the control methods for water heating devices provided in the embodiment of the present disclosure. When the computer executable instruction is executed by a computer controller, it can also be used to execute any of the control methods for water heating devices provided in the embodiment of the present disclosure to achieve corresponding beneficial effects.

[0117] Through the above description of the implementation method, the technicians in the relevant field can clearly understand that the embodiments of the present disclosure can be implemented with the help of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the embodiments of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of each embodiment of the present disclosure.

[0118] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for a water heating device, characterized in that: The water heating device comprises a water tank and a water outlet pipeline, a water level sensor is arranged in the water tank, and a heater is arranged in the water outlet pipeline; the method comprises: Periodically acquiring a water level signal generated by a water level sensor, and determining whether the water level of the water tank is in a decreasing state according to the water level signal; When it is determined that the water level of the water tank is in a falling state, the heater is controlled to heat the outlet water flow passing through; and when it is determined that the water level of the water tank is not in a falling state, the heater is controlled to stop heating.

2. The method according to claim 1, characterized in that The water heating device also includes a water injection pipeline; Before determining whether the water level of the water tank is in a decreasing state according to the water level signal, the method further includes: Determining whether the water level of the water tank reaches a preset water level according to the water level signal; When the water level of the water tank does not reach the preset water level, the water outlet pipeline is controlled to stop discharging water and water is injected into the water tank through the water injection pipeline; When it is determined according to the water level signal that the water level of the water tank reaches the preset water level, the water filling pipeline is controlled to stop filling water into the water tank, and the water outlet pipeline is controlled to discharge water; Determining whether the water level of the water tank is in a decreasing state according to the water level signal includes: determining whether the water level of the water tank is in a decreasing state according to the water level signal while controlling the water outlet pipeline to discharge water.

3. The method according to claim 2, characterized in that Also includes: When it is determined that the water level of the water tank is not in a falling state, the water outlet pipeline is controlled to stop discharging water.

4. The method according to any one of claims 1 to 3, characterized in that: In the case where it is determined that the water level in the water tank is in a decreasing state, the method further includes: Determine the water flow rate per unit time of the water outlet pipeline according to the water level signal; Controlling the heating power of the heater according to the water flow rate per unit time; The controlling the heater to heat the outlet water flow passing through includes: controlling the heater to heat the outlet water flow passing through according to the heating power.

5. The method according to claim 4, characterized in that The step of determining the water flow rate per unit time of the water outlet pipeline according to the water level signal comprises: Determine the speed at which the water level drops according to the water level signal; The water flow rate per unit time of the water outlet pipeline is determined according to the water level drop speed.

6. The method according to claim 4, characterized in that The method further includes: determining a target outlet water temperature; The controlling the power interval of the heater according to the water flow rate per unit time includes: determining the heating power according to the water flow rate per unit time and the target water outlet temperature.

7. The method according to claim 4, characterized in that The water outlet pipeline also includes a temperature sensor arranged at the outlet end of the heater; While controlling the heater to heat the outlet water flow according to the heating power, the method further includes: acquiring the real-time water flow temperature detected by the temperature sensor; The working state of the heater is adjusted according to the real-time water flow temperature and the target water outlet temperature.

8. The method according to claim 7, characterized in that The target outlet water temperature is a temperature range; The step of adjusting the working state of the heater according to the real-time water flow temperature and the target outlet water temperature includes: When the real-time water flow temperature is lower than the lower limit of the temperature range, controlling the heater to return from the pause state to the heating state, or increasing the heating power of the heater; and When the real-time water flow temperature is greater than the upper temperature limit of the temperature range, the heater is controlled to switch from the heating state to the pause state, or the heating power of the heater is reduced.

9. A control device for a water heating device, characterized in that: The water heating device comprises a water tank and a water outlet pipeline, a water level sensor is arranged in the water tank, and a heater is arranged in the water outlet pipeline; the device comprises: A judging unit, used for periodically acquiring a water level signal generated by a water level sensor, and determining whether the water level of the water tank is in a decreasing state according to the water level signal; The control unit is used to control the heater to continue heating the outlet water flow when it is determined that the water level of the water tank is in a falling state; and to control the heater to stop heating when it is determined that the water level of the water tank is not in a falling state.

10. A water heating device, characterized in that: It includes a controller, a water tank, a water outlet pipe, a water level sensor and a heater; The water level sensor is arranged in the water tank and is used to generate a water level signal according to the periodically detected water level height; The heater is arranged in the water outlet pipeline and is used to heat the water outlet flowing through the pipeline; The controller is used to control the working state of the heater according to the water level signal generated by the water level sensor in accordance with the control method of the water heating device according to any one of claims 1 to 8.

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