Water heater and control method, system and storage medium thereof

Abstract

The present invention discloses a water heater and its control method, system and storage medium, wherein the water heater includes: a controller, a flow sensor, a water inlet branch, a temperature adjustment branch, a heat exchange branch and a water outlet branch; the temperature adjustment branch includes a second solenoid valve, an expansion water tank and a third solenoid valve, the first connection port of the second solenoid valve is connected to the water outlet of the heat exchange branch, the second connection port of the second solenoid valve is connected to the first connection port of the expansion water tank, the second connection port of the expansion water tank is connected to the first connection port of the third solenoid valve, and the second connection port of the third solenoid valve is connected to the water inlet of the heat exchange branch. The present invention controls the opening and closing of three solenoid valves through the expansion water tank, and when the user has a need for re-discharge, the hot water stored in the expansion water tank is reheated to the user, avoiding the occurrence of the phenomenon of re-discharge water temperature drop; in addition, when the water pressure is unstable, the expansion water tank absorbs water flow at high pressure and releases water flow at low pressure, so as to achieve a pressure stabilizing effect and improve the user's experience.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a water heater and a control method, system and storage medium thereof. Background Art

[0002] The water temperature often drops during the use of the water heater. That is, after the user releases the hot water from the water heater, he temporarily turns off the water heater. When the user turns on the water heater again, he will feel that the water temperature is first hot, then slowly cools down, and then becomes hot again. This is because the water heater needs to be ignited and transferred when it is started. In a short period of time after the water heater is temporarily turned off, the water heater will output the hot water left in the pipe (the water temperature is hot at first), and then the cold water that will appear during the ignition process (then slowly cools down). Finally, the water heater will burn out hot water according to user needs (and then become hot again). This results in a particularly poor water temperature experience for users using the water heater. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art water heater in that the outlet water temperature drops and the water pressure fluctuates greatly during use, which leads to poor water temperature experience for users when using the water heater. A water heater and its control method, system and storage medium are provided.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a water heater, which comprises: a controller, a flow sensor, a water inlet branch, a temperature adjustment branch, a heat exchange branch and a water outlet branch;

[0006] One interface of the temperature regulating branch is respectively connected to the water outlet of the water inlet branch and the water inlet of the heat exchange branch, the water inlet of the water outlet branch is respectively connected to the other interface of the temperature regulating branch and the water outlet of the heat exchange branch, the water outlet of the water outlet branch is connected to an external faucet, and the flow sensor is arranged at the water inlet of the heat exchange branch;

[0007] The water inlet branch comprises a first solenoid valve, and two connecting ports of the first solenoid valve are respectively connected to the water inlet and the water outlet of the water inlet branch;

[0008] The temperature control branch includes a second solenoid valve, an expansion water tank and a third solenoid valve, the first connection port of the second solenoid valve is communicated with the water outlet of the heat exchange branch, the second connection port of the second solenoid valve is communicated with the first connection port of the expansion water tank, the second connection port of the expansion water tank is communicated with the first connection port of the third solenoid valve, and the second connection port of the third solenoid valve is communicated with the water inlet of the heat exchange branch;

[0009] The controller is electrically connected to the flow sensor;

[0010] The controller is also electrically connected to the control end of the first solenoid valve, the control end of the second solenoid valve and the control end of the third solenoid valve respectively;

[0011] The flow sensor is used to collect the water flow at the water inlet of the heat exchange branch and send the water flow to the controller; the controller is used to send a first control instruction to the first solenoid valve to control the first solenoid valve to be in an open state or a closed state, and the controller is also used to send a second control instruction to the second solenoid valve to control the second solenoid valve to be in an open state or a closed state, and the controller is also used to send a third control instruction to the third solenoid valve to control the third solenoid valve to be in an open state or a closed state.

[0012] Preferably, the water heater further comprises a water inlet temperature sensor, a water outlet temperature sensor and a proportional valve;

[0013] The water inlet temperature sensor is arranged at the water inlet of the heat exchange branch, the water outlet temperature sensor is arranged at the water outlet of the heat exchange branch, and the proportional valve is arranged at the gas inlet of the water heater;

[0014] The controller is electrically connected to the water inlet temperature sensor, the water outlet temperature sensor and the proportional valve respectively;

[0015] The water inlet temperature sensor is used to collect the water inlet temperature of the water inlet of the heat exchange branch and send the water inlet temperature to the controller;

[0016] The outlet water temperature sensor is used to collect the outlet water temperature of the water inlet of the heat exchange branch and send the outlet water temperature to the controller;

[0017] The proportional valve is used to control the gas intake amount of the water heater and send the gas intake amount to the controller.

[0018] The present invention also provides a control method for a water heater, which is implemented using the water heater as described above. The control method is applied to a controller of the water heater, and the control method includes:

[0019] When the working mode of the water heater is the re-discharge constant temperature mode, obtaining the water flow rate collected by the flow sensor;

[0020] When the water flow rate drops to a first preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in an open state, and the third solenoid valve is controlled to be in a closed state;

[0021] When the water flow rate rises to the first preset threshold and the continuous time duration during which the water flow rate is less than the first preset threshold is less than the preset time duration, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state.

[0022] Preferably, the control method further includes:

[0023] When the water flow rate drops to a second preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state; wherein the second preset threshold is smaller than the first preset threshold.

[0024] Preferably, the control method further includes:

[0025] When the first solenoid valve and the second solenoid valve are in a closed state and the third solenoid valve is in an open state, if the water flow rate drops to a third preset threshold, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0026] Preferably, the control method further includes:

[0027] When the continuous time length that the water flow rate is less than the first preset threshold value is greater than or equal to the preset time length, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0028] Preferably, the control method further includes:

[0029] When the working mode of the water heater is the voltage stabilization mode, the first solenoid valve and the third solenoid valve are controlled to be in an open state, and the second solenoid valve is controlled to be in a closed state.

[0030] The present invention also provides a control system for a water heater, the control system comprising:

[0031] An acquisition module, used for acquiring the water flow collected by the flow sensor when the working mode of the water heater is the re-discharge constant temperature mode;

[0032] A control module is used to control the first solenoid valve and the second solenoid valve to be in an open state, and to control the third solenoid valve to be in a closed state when the water flow rate drops to a first preset threshold value; and is also used to control the first solenoid valve and the second solenoid valve to be in a closed state, and to control the third solenoid valve to be in an open state when the water flow rate rises to the first preset threshold value and the continuous time when the water flow rate is less than the first preset threshold value is less than a preset time.

[0033] Preferably, the control system further comprises:

[0034] The control module is further used to control the first solenoid valve and the second solenoid valve to be in a closed state, and control the third solenoid valve to be in an open state when the water flow rate drops to a second preset threshold value; wherein the second preset threshold value is less than the first preset threshold value;

[0035] and / or,

[0036] The control module is further configured to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state, if the water flow rate drops to a third preset threshold value when the first solenoid valve and the second solenoid valve are in a closed state and the third solenoid valve is in an open state;

[0037] and / or,

[0038] The control module is further configured to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state when the continuous time length during which the water flow rate is less than the first preset threshold value is greater than or equal to a preset time length;

[0039] and / or,

[0040] The control module is also used to control the first solenoid valve and the third solenoid valve to be in an open state, and control the second solenoid valve to be in a closed state when the working mode of the water heater is a voltage stabilization mode.

[0041] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method of the water heater described above is implemented.

[0042] The positive and progressive effects of the present invention are:

[0043] The expansion water tank is used to control the opening and closing of the three solenoid valves. When the user needs to re-discharge water, the hot water stored in the expansion water tank is reheated and provided to the user, avoiding the occurrence of temperature drop in the re-discharged water. In addition, when the water pressure is unstable, the expansion water tank can also absorb water flow at high pressure and release water flow at low pressure, thereby achieving the function of stabilizing the water flow and improving the user experience of using the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of a specific example of a water heater according to Embodiment 1 of the present invention;

[0045] Figure 2 is a first flow chart of a control method for a water heater according to Embodiment 2 of the present invention;

[0046] Figure 3 A first exemplary diagram of a water heater of a method for controlling a water heater according to Embodiment 2 of the present invention;

[0047] Figure 4 A second exemplary diagram of a water heater of a method for controlling a water heater according to Embodiment 2 of the present invention;

[0048] Figure 5 is a second flow chart of the control method of the water heater according to Embodiment 2 of the present invention;

[0049] Figure 6 is a third flow chart of the control method of the water heater according to the second embodiment of the present invention;

[0050] Figure 7 A third exemplary diagram of a water heater of the water heater control method according to Embodiment 2 of the present invention;

[0051] Figure 8 This is a schematic diagram of the structure of a control system for a water heater according to Embodiment 3 of the present invention;

[0052] Fig. 9 This is a schematic diagram of the structure of an electronic device according to Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0053] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0054] Example 1

[0055] This embodiment provides a water heater, which includes: a controller 1, a flow sensor 2, a water inlet branch 3, a temperature adjustment branch 4, a heat exchange branch 5 and a water outlet branch 6. Figure 1 A schematic diagram of an exemplary water heater structure is provided for this embodiment, wherein the combustion heat exchange system includes a heat exchange branch 5 .

[0056] One interface of the temperature control branch 4 is respectively connected to the water outlet of the water inlet branch 3 and the water inlet of the heat exchange branch 5, the water inlet of the water outlet branch 6 is respectively connected to the other interface of the temperature control branch 4 and the water outlet of the heat exchange branch 5, the water outlet of the water outlet branch 6 is connected to an external faucet, and the flow sensor 2 is arranged at the water inlet of the heat exchange branch 5.

[0057] The water inlet branch 3 comprises a first solenoid valve 44 , and two connecting ports of the first solenoid valve 44 are respectively connected to the water inlet and the water outlet of the water inlet branch 3 .

[0058] The temperature control branch 4 includes a second solenoid valve 41, an expansion water tank 42 and a third solenoid valve 43. The first connection port of the second solenoid valve 41 is connected to the water outlet of the heat exchange branch 5, the second connection port of the second solenoid valve 41 is connected to the first connection port of the expansion water tank 42, the second connection port of the expansion water tank 42 is connected to the first connection port of the third solenoid valve 43, and the second connection port of the third solenoid valve 43 is connected to the water inlet of the heat exchange branch 5.

[0059] The controller 1 is electrically connected to the flow sensor 2. The controller 1 is also electrically connected to the control end of the first electromagnetic valve 44, the control end of the second electromagnetic valve 41 and the control end of the third electromagnetic valve 43 respectively.

[0060] The flow sensor 2 is used to collect the water flow at the water inlet of the heat exchange branch 5 and send the water flow to the controller 1; the controller 1 is used to send a first control instruction to the first solenoid valve 44 to control the first solenoid valve 44 to be in an open state or a closed state, and the controller 1 is also used to send a second control instruction to the second solenoid valve 41 to control the second solenoid valve 41 to be in an open state or a closed state, and the controller 1 is also used to send a third control instruction to the third solenoid valve 43 to control the third solenoid valve 43 to be in an open state or a closed state.

[0061] In this embodiment, the expansion water tank 42 cooperates with the control of the opening and closing of the three solenoid valves. When the user has a need for re-discharge of water, the hot water stored in the expansion water tank 42 is provided to the user after being reheated, thereby avoiding the occurrence of a temperature drop in the re-discharged water. In addition, when the water pressure is unstable, the expansion water tank 42 can also absorb water flow at high pressure and release water flow at low pressure, thereby achieving the function of stabilizing the water flow, thereby improving the user experience of using the water heater.

[0062] In an optional embodiment, the water heater further includes a water inlet temperature sensor 7 , a water outlet temperature sensor 8 and a proportional valve 9 .

[0063] The water inlet temperature sensor 7 is arranged at the water inlet of the heat exchange branch 5, the water outlet temperature sensor 8 is arranged at the water outlet of the heat exchange branch 5, and the proportional valve 9 is arranged at the gas inlet of the water heater.

[0064] The controller 1 is electrically connected to the water inlet temperature sensor 7 , the water outlet temperature sensor 8 and the proportional valve 9 , respectively.

[0065] The water inlet temperature sensor 7 is used to collect the water inlet temperature of the water inlet of the heat exchange branch 5 and send the water inlet temperature to the controller 1 .

[0066] The outlet water temperature sensor 8 is used to collect the outlet water temperature of the water inlet of the heat exchange branch 5, and send the outlet water temperature to the controller 1. The proportional valve 9 is used to control the gas intake amount of the water heater, and send the gas intake amount to the controller 1.

[0067] In this embodiment, the water inlet temperature and the water outlet temperature of the water heater can be collected respectively by the water inlet temperature sensor 7 and the water outlet temperature sensor 8, so as to further adjust the opening and closing degree of the proportional valve 9 according to the water temperature, and then determine the heating degree of the hot water according to different gas intake amounts, and adjust the water outlet temperature of the water heater according to user needs.

[0068] Example 2

[0069] This embodiment provides a control method for a water heater. Figure 2 , using the water heater of Example 1, the control method is applied to the controller of the water heater, and the control method includes:

[0070] S1. When the working mode of the water heater is the re-discharge constant temperature mode, the water flow rate collected by the flow sensor is obtained.

[0071] S2. When the water flow rate drops to a first preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in an open state, and the third solenoid valve is controlled to be in a closed state.

[0072] The first preset threshold value can be set according to demand, for example, the first preset threshold value is set to 2 L / min (liter / minute).

[0073] In the initial state of the water heater, there is no water stored in the expansion tank, the first solenoid valve is in the open state, and the second and third solenoid valves are in the closed state. When the user turns on the hot water tap, tap water flows into the water heater from the water inlet branch, flows through the heat exchange branch, and then flows out from the water outlet branch. When the user turns off the hot water tap, the water heater still maintains a constant temperature combustion state.

[0074] See also Figure 3 When the water flow rate drops to the first preset threshold, the tap water will pass through the combustion heat exchange system and then flow into the expansion water tank 42 through the connecting pipe, and the expansion water tank 42 enters the hot water storage process. The arrow direction represents the forward direction of the water flow.

[0075] S3. When the water flow rate reaches a first preset threshold value and the continuous time during which the water flow rate is less than the first preset threshold value is less than a preset time length, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state.

[0076] The preset duration is set according to actual needs, for example, 3 minutes.

[0077] See also Figure 4 When the user opens the hot water tap again within 3 minutes, the water flow rate rises to the first preset threshold again, and it is judged that the user is in a state of re-water demand. At this time, the water pressure at the outlet of the water heater will become low. Since the first solenoid valve 44 and the second solenoid valve 41 are in a closed state, the third solenoid valve 43 is controlled to be in an open state. At this time, under the action of the air pressure of the expansion tank 42, the water in the expansion tank 42 will flow out from the channel of the third solenoid valve 43, and then flow through the water volume sensor and the heat exchange branch (combustion heat exchange system), and finally flow out from the water outlet joint. The direction of the arrow represents the forward direction of the water flow.

[0078] In this embodiment, since the water in the expansion water tank is the hot water stored in the previous hot water storage process, there is no cold water section during the pre-fan cleaning and ignition process of the water heater when water is discharged again, thereby avoiding the temperature drop of the re-discharged water and improving the user experience of using the water heater.

[0079] In an alternative embodiment, see Figure 5 , the control method further includes:

[0080] S4. When the water flow rate drops to a second preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state.

[0081] The second preset threshold is smaller than the first preset threshold. For example, when the first preset threshold is 2 L / min, the second preset threshold can be set to 1 L / min.

[0082] In this embodiment, when the water flow rate drops to the second preset threshold, it is determined that the expansion tank is full of hot water, so the first solenoid valve and the second solenoid valve are maintained in a closed state, and the third solenoid valve is controlled to be in an open state, waiting for the user to open the faucet of the water heater again.

[0083] In an alternative embodiment, see Figure 6 , the control method further includes:

[0084] When the first solenoid valve and the second solenoid valve are in the closed state and the third solenoid valve is in the open state, S5 is executed.

[0085] S5. If the water flow rate drops to a third preset threshold, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0086] The third preset threshold is set according to actual needs. For example, the third preset threshold can be set to 2.5 L / min.

[0087] In this embodiment, see Figure 7 , the direction of the arrow represents the direction of water flow. When the flow sensor 2 detects that the hot water flow provided by the expansion tank 42 drops to the third preset threshold, it is determined that the hot water stored in the expansion tank 42 has been consumed. At this time, the first solenoid valve 44 is controlled to be in an open state, and the second solenoid valve 41 and the third solenoid valve 43 are controlled to be in a closed state, so that the water heater enters a normal constant temperature heating process.

[0088] In an alternative embodiment, see Figure 6 , the control method further includes:

[0089] S6. When the continuous time length during which the water flow rate is less than the first preset threshold value is greater than or equal to the preset time length, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0090] The preset duration is set according to actual needs, for example, 3 minutes.

[0091] In this embodiment, if the user does not open the hot water tap again within a preset time, the water heater exits the water-discharging waiting state, thereby reducing the heating process and avoiding waste of gas.

[0092] In an optional embodiment, the control method further includes:

[0093] S7. When the working mode of the water heater is the voltage stabilization mode, the first solenoid valve and the third solenoid valve are controlled to be in an open state, and the second solenoid valve is controlled to be in a closed state.

[0094] In this embodiment, if the water pressure in the user's home fluctuates greatly, the outlet water temperature of the water heater will also be unstable. At this time, the water heater can also be set to a voltage stabilization mode. In the voltage stabilization mode, the controller will control the first solenoid valve and the third solenoid valve to be in an open state, and control the second solenoid valve to be in a closed state. In this way, during the use of hot water, the expansion tank can absorb water flow at high pressure and release water flow at low pressure, thereby achieving the function of stabilizing the outlet water flow and improving the user's experience of using the water heater.

[0095] An example of a control method for applying a water heater is provided below.

[0096] Assume that the first preset threshold is 2 L / min, the second preset threshold is 1 L / min, the third preset threshold is 2.5 L / min, and the preset time is 3 minutes.

[0097] In the initial state, there is no water stored in the expansion tank, the first solenoid valve is in the open state, and the second and third solenoid valves are in the closed state. When the user turns on the hot water tap, tap water flows into the water heater from the water inlet joint (i.e. the water inlet of the water inlet branch), flows through the combustion heat exchange system (i.e. the heat exchange branch) and then flows out from the water outlet joint (i.e. the water outlet of the water outlet branch). At this time, the state of the water heater is the same as that of a general water heater.

[0098] Then the user turns off the hot water tap, and the water heater still maintains a constant temperature combustion state. When the water flow is detected to be less than 2L / min, the controller opens the second solenoid valve. Since there is no water stored in the expansion tank, the tap water will pass through the combustion heat exchange system and then flow into the expansion tank through the connecting pipe, and the expansion tank enters the heat storage process.

[0099] When the flow rate is less than 1L / min, it is determined that the expansion tank is full of hot water, and the water heater stops burning. The controller closes the first solenoid valve, closes the second solenoid valve, and opens the third solenoid valve. This state is maintained until the user opens the hot water tap again.

[0100] When the user opens the hot water tap again within 3 minutes, the water pressure at the outlet of the water heater will become low. Since the first and second solenoid valves are closed and the third solenoid valve is opened, the water in the expansion tank will flow out from the channel of the third solenoid valve under the action of the air pressure of the expansion tank, and then flow through the water volume sensor (i.e., flow sensor) and the combustion heat exchange system, and finally flow out from the water outlet joint. At this time, the water heater determines that the user is in a state of needing to discharge water again. Since the water in the expansion tank is the hot water stored in the previous heat storage process, there will be no cold water section during the cleaning and ignition process before the fan of the water heater when discharging water again, thereby avoiding the phenomenon of temperature drop of the re-discharging water.

[0101] When the water volume sensor detects that the hot water flow rate provided by the expansion tank is less than 2.5L / min, it is determined that the hot water stored in the expansion tank has been consumed. At this time, the first solenoid valve is opened and the third solenoid valve is closed at the same time. At this time, the second solenoid valve remains in the original closed state. In this way, the water heater enters the normal constant temperature heating process.

[0102] If the user does not open the hot water tap again within 3 minutes, the water heater exits the water re-discharging waiting state, and the controller opens the first solenoid valve, closes the second solenoid valve, and closes the third solenoid valve.

[0103] In addition, if the water pressure in the user's home fluctuates greatly, resulting in an extremely unstable water outlet temperature, a voltage stabilization mode can be set at this time. When the user switches to the voltage stabilization mode, the controller will maintain the first solenoid valve open, the second solenoid valve closed, and the third solenoid valve open. In this way, during the hot water use process, the expansion tank can absorb water flow at high pressure and release water flow at low pressure, thereby achieving the function of stabilizing the water outlet flow.

[0104] This example uses an expansion tank in conjunction with the valve's opening and closing logic to form a heat storage process when the user turns off the water, providing timely hot water output when the water is discharged again, and can reliably repeat the heat storage process. In addition, without changing the structure, the two functions of constant temperature and constant pressure mode can be switched.

[0105] Example 3

[0106] This embodiment provides a control system for a water heater. Figure 8 , the control system includes:

[0107] The acquisition module 11 is used to acquire the water flow collected by the flow sensor when the working mode of the water heater is the re-discharge constant temperature mode.

[0108] The control module 12 is used to control the first solenoid valve and the second solenoid valve to be in an open state, and to control the third solenoid valve to be in a closed state when the water flow rate drops to a first preset threshold value; and is also used to control the first solenoid valve and the second solenoid valve to be in a closed state, and to control the third solenoid valve to be in an open state, when the water flow rate rises to the first preset threshold value and the continuous length of time when the water flow rate is less than the first preset threshold value is less than the preset time length.

[0109] In an optional embodiment, the control module 12 is also used to control the first solenoid valve and the second solenoid valve to be in a closed state, and control the third solenoid valve to be in an open state when the water flow rate drops to a second preset threshold value; wherein the second preset threshold value is smaller than the first preset threshold value.

[0110] In an optional embodiment, the control module 12 is also used to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state when the water flow rate drops to a third preset threshold value when the first solenoid valve and the second solenoid valve are in a closed state and the third solenoid valve is in an open state.

[0111] In an optional embodiment, the control module 12 is also used to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state when the water flow rate is less than the first preset threshold for a continuous time period greater than or equal to a preset time period.

[0112] In an optional embodiment, the control module 12 is further configured to control the first solenoid valve and the third solenoid valve to be in an open state, and control the second solenoid valve to be in a closed state when the working mode of the water heater is a voltage stabilization mode.

[0113] It should be noted that the implementation principles and technical effects of each module of the water heater control system of this embodiment can refer to the corresponding parts of Example 2, and will not be repeated here.

[0114] Example 4

[0115] This embodiment provides an electronic device, Fig. 9 The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the control method of the water heater of the second embodiment is implemented. Fig. 9 The electronic device 30 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0116] like Fig. 9As shown, the electronic device 30 may be in the form of a general-purpose computing device, for example, it may be a server device. The components of the electronic device 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including the memory 32 and the processor 31).

[0117] The bus 33 includes a data bus, an address bus, and a control bus.

[0118] The memory 32 may include a volatile memory, such as a random access memory (RAM) 321 and / or a cache memory 322 , and may further include a read-only memory (ROM) 323 .

[0119] The memory 32 may also include a program / utility 325 having a set (at least one) of program modules 324, such program modules 324 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0120] The processor 31 executes various functional applications and data processing by running the computer programs stored in the memory 32, such as the control method of the water heater of the second embodiment of the present invention.

[0121] The electronic device 30 may also communicate with one or more external devices 34 (e.g., keyboards, pointing devices, etc.). Such communication may be performed via an input / output (I / O) interface 35. Furthermore, the model generating device 30 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 36. Fig. 9 As shown, the network adapter 36 communicates with other modules of the model-generated device 30 via the bus 33. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0122] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0123] Example 5

[0124] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the control method of the water heater of Embodiment 2 is implemented.

[0125] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0126] In a possible implementation manner, the present invention may also be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the control method for the water heater of Embodiment 2.

[0127] Among them, the program code for executing the present invention can be written in any combination of one or more programming languages, and the program code can be executed completely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on a remote device, or completely on the remote device.

[0128] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A water heater, characterized in that: The water heater comprises: a controller, a flow sensor, a water inlet branch, a temperature adjustment branch, a heat exchange branch and a water outlet branch; One interface of the temperature regulating branch is respectively connected to the water outlet of the water inlet branch and the water inlet of the heat exchange branch, the water inlet of the water outlet branch is respectively connected to the other interface of the temperature regulating branch and the water outlet of the heat exchange branch, the water outlet of the water outlet branch is connected to an external faucet, and the flow sensor is arranged at the water inlet of the heat exchange branch; The water inlet branch comprises a first solenoid valve, and two connecting ports of the first solenoid valve are respectively connected to the water inlet and the water outlet of the water inlet branch; The temperature control branch includes a second solenoid valve, an expansion water tank and a third solenoid valve, the first connection port of the second solenoid valve is communicated with the water outlet of the heat exchange branch, the second connection port of the second solenoid valve is communicated with the first connection port of the expansion water tank, the second connection port of the expansion water tank is communicated with the first connection port of the third solenoid valve, and the second connection port of the third solenoid valve is communicated with the water inlet of the heat exchange branch; The controller is electrically connected to the flow sensor; The controller is also electrically connected to the control end of the first solenoid valve, the control end of the second solenoid valve and the control end of the third solenoid valve respectively; The flow sensor is used to collect the water flow at the water inlet of the heat exchange branch and send the water flow to the controller; the controller is used to send a first control instruction to the first solenoid valve to control the first solenoid valve to be in an open state or a closed state, and the controller is also used to send a second control instruction to the second solenoid valve to control the second solenoid valve to be in an open state or a closed state, and the controller is also used to send a third control instruction to the third solenoid valve to control the third solenoid valve to be in an open state or a closed state.

2. The water heater according to claim 1, characterized in that The water heater also includes a water inlet temperature sensor, a water outlet temperature sensor and a proportional valve; The water inlet temperature sensor is arranged at the water inlet of the heat exchange branch, the water outlet temperature sensor is arranged at the water outlet of the heat exchange branch, and the proportional valve is arranged at the gas inlet of the water heater; The controller is electrically connected to the water inlet temperature sensor, the water outlet temperature sensor and the proportional valve respectively; The water inlet temperature sensor is used to collect the water inlet temperature of the water inlet of the heat exchange branch and send the water inlet temperature to the controller; The outlet water temperature sensor is used to collect the outlet water temperature of the water inlet of the heat exchange branch and send the outlet water temperature to the controller; The proportional valve is used to control the gas intake amount of the water heater and send the gas intake amount to the controller.

3. A method for controlling a water heater, characterized in that: The control method is implemented by using a water heater according to any one of claims 1 to 2, and is applied to a controller of the water heater. The control method comprises: When the working mode of the water heater is the re-discharge constant temperature mode, obtaining the water flow rate collected by the flow sensor; When the water flow rate drops to a first preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in an open state, and the third solenoid valve is controlled to be in a closed state; When the water flow rate rises to the first preset threshold and the continuous time duration during which the water flow rate is less than the first preset threshold is less than the preset time duration, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state.

4. The control method of the water heater according to claim 3, characterized in that: The control method further comprises: When the water flow rate drops to a second preset threshold, the first solenoid valve and the second solenoid valve are controlled to be in a closed state, and the third solenoid valve is controlled to be in an open state; wherein the second preset threshold is smaller than the first preset threshold.

5. The control method of the water heater according to claim 3, characterized in that: The control method further comprises: When the first solenoid valve and the second solenoid valve are in a closed state and the third solenoid valve is in an open state, if the water flow rate drops to a third preset threshold, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

6. The control method of the water heater according to claim 3, characterized in that: The control method further comprises: When the continuous time length that the water flow rate is less than the first preset threshold value is greater than or equal to the preset time length, the first solenoid valve is controlled to be in an open state, and the second solenoid valve and the third solenoid valve are controlled to be in a closed state.

7. The control method of the water heater according to claim 3, characterized in that: The control method further comprises: When the working mode of the water heater is the voltage stabilization mode, the first solenoid valve and the third solenoid valve are controlled to be in an open state, and the second solenoid valve is controlled to be in a closed state.

8. A control system for a water heater as claimed in claim 1 or 2, characterized in that: The control system comprises: An acquisition module, used for acquiring the water flow collected by the flow sensor when the working mode of the water heater is the re-discharge constant temperature mode; A control module is used to control the first solenoid valve and the second solenoid valve to be in an open state, and to control the third solenoid valve to be in a closed state when the water flow rate drops to a first preset threshold value; and is also used to control the first solenoid valve and the second solenoid valve to be in a closed state, and to control the third solenoid valve to be in an open state when the water flow rate rises to the first preset threshold value and the continuous time when the water flow rate is less than the first preset threshold value is less than a preset time.

9. The control system of the water heater according to claim 8, characterized in that: The control system further comprises: The control module is further used to control the first solenoid valve and the second solenoid valve to be in a closed state, and control the third solenoid valve to be in an open state when the water flow rate drops to a second preset threshold value; wherein the second preset threshold value is less than the first preset threshold value; or, The control module is further configured to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state, if the water flow rate drops to a third preset threshold value when the first solenoid valve and the second solenoid valve are in a closed state and the third solenoid valve is in an open state; or, The control module is further configured to control the first solenoid valve to be in an open state, and control the second solenoid valve and the third solenoid valve to be in a closed state when the continuous time length during which the water flow rate is less than the first preset threshold value is greater than or equal to a preset time length; or, The control module is also used to control the first solenoid valve and the third solenoid valve to be in an open state, and control the second solenoid valve to be in a closed state when the working mode of the water heater is a voltage stabilization mode.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the water heater according to any one of claims 3 to 7 is implemented.

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