Control method of water heater system and water heater system

Abstract

The invention discloses a control method of a water heater system and the water heater system.The control method comprises the steps that S1, a valve located on a user side water outlet pipe of a user side is in a closed state, and the first water pressure of a hot water pipeline is detected through a first pressure sensor; s2, judging whether to enter a pressure control mode or not according to the change of the first water pressure of the hot water pipeline, if so, entering the step S3, and if not, returning to the step S1; and S3, the second water pressure of the hot water pipeline is adjusted by controlling the terminal water pressure control device, and the water heater is adjusted to be in the operation mode corresponding to the pressure threshold value range according to the different pressure threshold value ranges where the second water pressure of the hot water pipeline is located. According to the invention, a user can directly adjust the operation mode of the water heater at a user side, so that remote control of function switching of the water heater is realized.

Description

Technical Field

[0001] The present invention relates to a control method for a water heater system and a water heater system. Background Art

[0002] Currently, the function control of gas water heaters is mostly directly controlled through an operator on the front panel, or through remote control, such as Bluetooth or radio frequency remote control, and wifi mobile phone remote control, etc.

[0003] In the case of controlling through the operator, the user needs to come to the machine side every time to operate, which brings trouble to the user. For the used remote control, such as Bluetooth or radio frequency remote control, it can only be used within a short distance and there cannot be strong occlusion in the middle. Another example is wifi mobile phone remote control, which requires the presence of a wifi signal near the machine or the machine itself has an Internet card to be able to control.

[0004] The above control methods all require a certain external environment or will bring a large cost increase. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical problems in the prior art, and provide a control method for a water heater system and a water heater system.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A control method for a water heater system, characterized in that the water heater system includes a water heater, a terminal water pressure control device at the user end, and a hot water pipeline connecting the water heater and the user end, and the control method includes:

[0008] S1: Keep the valve on the user-end outlet pipe at the user end in a closed state, and detect the first water pressure of the hot water pipeline through a first pressure sensor;

[0009] S2: Determine whether to enter the pressure control mode according to the change of the first water pressure of the hot water pipeline. If so, enter step S3; if not, return to step S1;

[0010] S3: Adjust the second water pressure of the hot water pipeline by controlling the terminal water pressure control device, and adjust the water heater to be in an operation mode corresponding to the pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipeline is located.

[0011] In this technical solution, by controlling the terminal water pressure control device at the user end to adjust the second water pressure of the hot water pipeline, according to the different pressure threshold ranges where the second water pressure of the hot water pipeline is located, the water heater is adjusted to the operation mode corresponding to this pressure threshold range, that is, enabling the user to directly adjust the operation mode of the water heater at the user end, thereby realizing remote control of the function switching of the water heater. Among them, the change in the first water pressure of the hot water pipeline can also be caused by the user controlling the terminal water pressure control device.

[0012] Preferably, in step S1, it further includes obtaining the average water pressure of the hot water pipeline within the first preset time;

[0013] In step S2, it further includes that when, within the second preset time, the first water pressure appears greater than the sum of the average water pressure and the preset water pressure for multiple times, entering the pressure control mode.

[0014] In this technical solution, through the above settings, specific conditions for determining whether to enter the pressure control mode are provided.

[0015] Preferably, the first preset time is 5 minutes - 15 minutes; the second preset time is 3 seconds - 5 seconds.

[0016] In this technical solution, through the above settings, a specific value range of the first preset time is provided to avoid inaccurate average water pressure obtained due to the first preset time being too short or too long; a specific value range of the second preset time is provided to avoid entering the pressure control mode due to the user accidentally touching the terminal water pressure control device.

[0017] Preferably, when in the pressure control mode, the switch valve at the water inlet of the water heater is in the closed state to make the hot water pipeline in a closed state;

[0018] The switch valve is used to control the connection state between the hot water pipeline and the water supply pipeline.

[0019] In this technical solution, through the above settings, the hot water pipeline is in a closed state, thereby ensuring the accuracy of the change in the second water pressure.

[0020] Preferably, in step S3, the operation mode of the water heater at least includes a shutdown mode. When in the shutdown mode, the switch valve is opened to exit the pressure control mode.

[0021] In this technical solution, by setting the operation mode to at least include a shutdown mode, an option to exit the pressure control mode can be provided.

[0022] Preferably, before step S3, it further includes:

[0023] Determine whether the duration of entering the pressure control mode is less than a third preset time. If so, enter step S3. If not, open the switching valve and exit the pressure control mode. Wherein, the third preset time is less than or equal to 2 minutes.

[0024] In this technical solution, by setting the step of determining whether the duration of entering the pressure control mode is less than the third preset time, that is, ensuring that the duration of the pressure control mode will not be too long and affect the normal use of hot water at the user end.

[0025] Preferably, the operation modes of the water heater further include a temperature increase mode, a temperature decrease mode, and a temperature holding mode.

[0026] In this technical solution, through the above settings, specific different operation modes of the water heater are provided.

[0027] Preferably, in step S3, it further includes that when the time for the second water pressure in the hot water pipeline to be within the same pressure threshold range is greater than a fourth preset time, adjust the water heater to be in the operation mode corresponding to this pressure threshold range, where the fourth preset time is greater than or equal to 3 seconds.

[0028] In this technical solution, through the above settings, it is ensured that the user can accurately select the corresponding mode instead of accidental touch.

[0029] A water heater system, characterized in that the water heater system adopts the control method of the water heater system as described above, and the terminal water pressure control device includes:

[0030] A pressure adjusting rod;

[0031] A piston assembly, the piston assembly includes a piston cylinder and a piston located in the piston cylinder. The pressure adjusting rod is connected to the piston. The pressure adjusting rod drives the piston to move up and down along the height direction of the piston cylinder in the piston cylinder. The piston divides the piston cylinder into an upper piston chamber and a lower piston chamber along the height direction. The lower piston chamber is communicated with the hot water pipeline through a connecting pipe;

[0032] A pressure gauge, one end of the pressure gauge is provided with a second pressure sensor for detecting the second water pressure in the hot water pipeline, and the other end of the pressure gauge is provided with a pressure panel, and indication marks corresponding to different operation modes are provided on the pressure panel.

[0033] In this technical solution, by setting the specific structure of the terminal water pressure control device, the terminal water pressure control device can adjust the first water pressure and the second water pressure in the hot water pipeline.

[0034] Preferably, a communication cavity communicating the upper piston cavity and the lower piston cavity is provided in the piston, and the terminal water pressure control device further includes:

[0035] An air supplement channel communicating the upper piston cavity and the external space of the user end;

[0036] A first one-way valve located in the communication cavity and configured to block the medium in the lower piston cavity from flowing back to the upper piston cavity;

[0037] A second one-way valve located in the communication pipe and configured to block the medium in the hot water pipe from flowing back to the lower piston cavity.

[0038] In this technical solution, by providing the air supplement channel, the first one-way valve and the second one-way valve, the hot water pipe can be further pressurized.

[0039] The positive and progressive effects of the present invention are as follows:

[0040] The present invention adjusts the second water pressure of the hot water pipe by controlling the terminal water pressure control device at the user end, and adjusts the operating mode of the water heater corresponding to the pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipe is located, that is, enables the user to directly adjust the operating mode of the water heater at the user end, thereby realizing remote control of the function switching of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a flowchart of a control method for a water heater system provided by an exemplary embodiment of the present invention.

[0042] Figure 2 It is a schematic structural diagram of a water heater system provided by an exemplary embodiment of the present invention.

[0043] Figure 3 It is a partial schematic structural diagram of a water heater system provided by an exemplary embodiment of the present invention.

[0044] Figure 4 It is a schematic structural diagram of a pressure panel of a water heater system provided by an exemplary embodiment of the present invention.

[0045] Figure 5 It is a graph (I) showing the change of water pressure in the hot water pipe over time.

[0046] Figure 6 It is a graph (II) showing the change of water pressure in the hot water pipe over time.

[0047] DESCRIPTION OF THE REFERENCE NUMERALS

[0048] Water heater 1

[0049] On-off valve 11

[0050] Heat exchanger 12

[0051] Inlet pipe 131

[0052] Outlet pipe 132

[0053] Check valve 14

[0054] Inlet water temperature sensor 151

[0055] Outlet water temperature sensor 152

[0056] Flow sensor 16

[0057] Burner 17

[0058] Gas inlet pipe 18

[0059] Gas proportional valve 19

[0060] User end 2

[0061] Terminal water pressure control device 3

[0062] Pressure regulating lever 31

[0063] Piston assembly 32

[0064] Piston cylinder 33

[0065] Upper piston chamber 331

[0066] Lower piston chamber 332

[0067] Piston 34

[0068] Connecting pipe 35

[0069] Pressure gauge 36

[0070] Second pressure sensor 361

[0071] Pressure panel 362

[0072] Indicator mark 363

[0073] Air supplement channel 37

[0074] First check valve 38

[0075] Second check valve 39

[0076] Hot water pipeline 4

[0077] First pressure sensor 41

[0078] User end outlet pipe 5

[0079] Valve 51

[0080] Water supply pipeline 6

[0081] Valve body 7

[0082] Pipeline switching device 8

[0083] Cold water pipeline 9 Specific implementation manner

[0084] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments thereby.

[0085] This embodiment provides a control method for a water heater system. The water heater system includes a water heater, a terminal water pressure control device at the user end, and a hot water pipeline connecting the water heater and the user end, as Figure 1 shown, the control method includes:

[0086] S100. Close the valve on the user end outlet pipe at the user end, and detect the first water pressure of the hot water pipeline through the first pressure sensor;

[0087] S200. Determine whether to enter the pressure control mode according to the change of the first water pressure of the hot water pipeline. If so, enter step S300. If not, return to step S100;

[0088] S300. Adjust the second water pressure of the hot water pipeline by controlling the terminal water pressure control device, and adjust the water heater to be in an operation mode corresponding to the pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipeline is located.

[0089] In this way, by controlling the terminal water pressure control device at the user end to adjust the second water pressure of the hot water pipeline, and adjusting the water heater to be in an operation mode corresponding to the pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipeline is located, that is, enabling the user to directly adjust the operation mode of the water heater at the user end, so as to realize the remote control of the function switching of the water heater. Among them, the change of the first water pressure of the hot water pipeline may also be caused by the user controlling the terminal water pressure control device.

[0090] Preferably, in step S100, it further includes obtaining the average water pressure of the hot water pipeline within a first preset time; in step S200, it further includes that when within a second preset time, the first water pressure appears greater than the sum of the average water pressure and the preset water pressure for multiple times, entering the pressure control mode. In this way, through the above settings, specific conditions for determining whether to enter the pressure control mode are provided. In this embodiment, when within the second preset time, the first water pressure appears greater than the sum of the average water pressure and the preset water pressure for two times, entering the pressure control mode. However, it is not limited thereto. In other embodiments, it may also be when the first water pressure appears greater than the sum of the average water pressure and the preset water pressure for three times, four times or other multiple times, entering the pressure control mode. By setting the judgment condition as the first water pressure being greater than the sum of the average water pressure and the preset water pressure instead of the first water pressure being greater than the average water pressure, misjudgment can be avoided as much as possible.

[0091] Preferably, the first preset time is 5 minutes - 15 minutes; the second preset time is 3 seconds - 5 seconds. In this way, through the above settings, a specific value range of the first preset time is provided to avoid inaccurate average water pressure obtained due to the first preset time being too short or too long; a specific value range of the second preset time is provided to avoid the user accidentally touching the terminal water pressure control device and entering the pressure control mode.

[0092] Preferably, when in the pressure control mode, the switch valve at the water inlet of the water heater is in a closed state to make the hot water pipeline in a closed state; the switch valve is used to control the connection state between the hot water pipeline and the water supply pipeline. In this way, through the above settings, the hot water pipeline is in a closed state, so as to ensure the accuracy of the change of the second water pressure.

[0093] Preferably, in step S300, the operating mode of the water heater at least includes a shutdown mode. When in the shutdown mode, the switch valve is opened to exit the pressure control mode. In this way, by setting the operating mode to at least include the shutdown mode, an option to exit the pressure control mode can be provided.

[0094] Preferably, before step S300, it further includes:

[0095] Judging whether the duration of entering the pressure control mode is less than a third preset time. If so, entering step S300; if not, opening the switch valve to exit the pressure control mode; wherein, the third preset time is less than or equal to 2 minutes.

[0096] In this way, by setting the step of judging whether the duration of entering the pressure control mode is less than the third preset time, that is, ensuring that the duration of the pressure control mode will not be too long and affect the normal use of hot water at the user end.

[0097] Preferably, the operating modes of the water heater further include a temperature increase mode, a temperature decrease mode, and a temperature holding mode. In this way, through the above settings, specific different operating modes of the water heater are provided.

[0098] As described above, different pressure threshold ranges correspond to different operating modes, that is, the number of pressure threshold ranges corresponds to the number of operating modes, and the two are in one-to-one correspondence. For example, the first pressure threshold range corresponds to the off mode, the second pressure threshold range corresponds to the temperature increase mode, the third pressure threshold range corresponds to the temperature decrease mode, the fourth pressure threshold range corresponds to the temperature holding mode, and so on.

[0099] Preferably, in step S300, it further includes that when the second water pressure in the hot water pipeline is within the same pressure threshold range for a time greater than a fourth preset time, the water heater is adjusted to the operating mode corresponding to this pressure threshold range, where the fourth preset time is greater than or equal to 3 seconds. In this way, through the above settings, it is ensured that the user can accurately select the corresponding mode instead of accidentally touching it.

[0100] As Figures 2 to 4 shown, this embodiment also provides a water heater system. This water heater system adopts the control method of the water heater system as described above. The terminal water pressure control device 3 of this water heater system includes: a pressure adjustment rod 31, a piston assembly 32, and a pressure gauge 36.

[0101] The piston assembly 32 includes a piston cylinder 33 and a piston 34 located inside the piston cylinder 33. The pressure adjustment rod 31 is connected to the piston 34. The pressure adjustment rod 31 drives the piston 34 to move up and down along the height direction of the piston cylinder 33. The piston 34 divides the piston cylinder 33 into an upper piston chamber 331 and a lower piston chamber 332 along the height direction. The lower piston chamber 332 is connected to the hot water pipeline 4 through a connecting pipe 35.

[0102] One end of the pressure gauge 36 is provided with a second pressure sensor 361. The second pressure sensor 361 is used to detect the second water pressure in the hot water pipeline 4 (that is, the second water pressure in the hot water pipeline 4 is detected by the second pressure sensor 361). The other end of the pressure gauge 36 is provided with a pressure panel 362. The pressure panel 362 is provided with indication marks 363 corresponding to different operating modes. The indication marks 363 can be indicator lights or pressure values.

[0103] In this way, by setting the specific structure of the terminal water pressure control device 3, the terminal water pressure control device 3 can adjust the first water pressure and the second water pressure in the hot water pipeline 4.

[0104] Preferably, a communication chamber communicating the upper piston chamber 331 and the lower piston chamber 332 is provided in the piston 34. The terminal water pressure control device 3 further includes: an air supply passage 37, a first one-way valve 38, and a second one-way valve 39.

[0105] The air supply passage 37 communicates the upper piston chamber 331 with the external space of the user terminal 2.

[0106] The first one-way valve 38 is located in the communication chamber and is used to block the medium in the lower piston chamber 332 from flowing back to the upper piston chamber 331.

[0107] The second one-way valve 39 is located in the communication pipe 35 and is used to block the medium in the hot water pipe 4 from flowing back to the lower piston chamber 332.

[0108] In this way, by providing the air supply passage 37, the first one-way valve 38, and the second one-way valve 39, the hot water pipe 4 can be further pressurized.

[0109] The user terminal 2 is further provided with a valve body 7 and a pipeline switching device 8 located in the valve body 7. The user terminal outlet pipe 5 is inserted into the valve body 7, and the user terminal outlet pipe 5 switches between two states of being connected to the hot water pipe 4 and being connected to the cold water pipe 9. The cold water pipe 9 is communicated with the tap water pipe 6.

[0110] The water heater 1 further includes a heat exchanger 12, and a water inlet pipe 131 and a water outlet pipe 132 respectively connected to the inlet and outlet of the heat exchanger 12. The water outlet of the water outlet pipe 132 is connected to the inlet of the hot water pipe 4, the water inlet of the water inlet pipe 131 is connected to the tap water pipe 6, and a switching valve 11 is provided near the water inlet of the water inlet pipe 13.

[0111] A one-way valve 14, a water inlet temperature sensor 151, and a flow sensor 16 are provided on the water inlet pipe 131. A water outlet temperature sensor 152 is provided on the water outlet pipe 132. The one-way valve 14 is used to prevent the water in the water inlet pipe 131 from flowing back to the tap water pipe 6, and the one-way valve 14 is located upstream of the first pressure sensor 41 and upstream of the switching valve 11. The water inlet temperature sensor 151 is used to detect the water temperature in the water inlet pipe 131. The flow sensor 16 is used to detect the water flow in the water inlet pipe 131. Both the water inlet temperature sensor 151 and the flow sensor 16 are located downstream of the switching valve 11. The water outlet temperature sensor 152 is used to detect the water temperature in the water outlet pipe 132.

[0112] When the water heater 1 is in the pressure control mode, since the switching valve 11 at the water inlet of the water heater 1 is in the closed state, the entire hot water pipe 4 from the water inlet pipe 131, the water outlet pipe 132, and the water outlet of the water outlet pipe 132 to the user terminal 2 is in a closed state. Therefore, the first pressure sensor 41 can be provided downstream of the switching valve 11 on the water inlet pipe 131, and the water pressure detected by it is the first water pressure of the hot water pipe 4.

[0113] The water heater 1 further includes a burner 17 for heating the heat exchanger 12 and an intake pipe 18 for supplying gas to the burner 17. A gas proportional valve 19 is provided on the intake pipe 18. In this way, by setting the gas proportional valve 19, the gas intake can be distributed, thereby realizing the adjustment of the heating intensity of the burner 17.

[0114] When the user needs to control the operation mode of the water heater 1 at the user end 2, first, the valve 51 on the outlet pipe 5 at the user end needs to be kept closed. Then, press the pressure adjustment lever 31. When the pressure adjustment lever 31 is pressed, the pressure adjustment lever 31 pushes the piston 34 to descend, and part of the water in the piston cylinder 33 will be squeezed into the hot water pipeline 4. Since a check valve 14 is installed upstream of the first pressure sensor 41 in the water heater 1, it can prevent the water from being squeezed back into the water supply pipeline 6. Therefore, when the pressure adjustment lever 31 is pressed, the water pressure in the hot water pipeline 4 will necessarily rise.

[0115] The water heater 1 can sense the signal of this first water pressure rise through the first pressure sensor 41. Then, when the pressure adjustment lever 31 is released, the first water pressure in the hot water pipeline 4 will recover. The first water pressure signal is as Figure 5 shown. In this way, the water heater 1 can remotely receive the control signal sent from the user end 2. To improve the control accuracy and prevent mis-triggering, it is set in the program that when two consecutive first water pressure fluctuations are received within a short second preset time (such as 3 seconds), the water heater 1 can enter the pressure control mode, as Figure 6 shown.

[0116] After receiving two pressure pulse fluctuations within the short second preset time, the water heater 1 will close the switch valve 11 at the water inlet, so that the entire hot water pipeline 4 from the inlet pipe 131 and the outlet pipe 132 of the water heater 1 to the outlet of the outlet pipe 132 to the user end 2 is in a closed state.

[0117] Then, the user adjusts the pressure adjustment lever 31 to stabilize the second water pressure in the hot water pipeline 4 at a certain specific pressure threshold and keeps the second water pressure for a short fourth preset time (such as 3 seconds). Then, after the second pressure sensor 361 detects the second water pressure, corresponding operation mode switching will be performed.

[0118] To enable the user to conveniently increase and decrease the second water pressure. Corresponding structural designs are made at the user end 2.

[0119] When the user needs to increase the pressure, the user needs to pull the pressure adjustment lever 31 up and down. When pulling up the pressure adjustment lever 31, the piston 34 also moves upward accordingly. At this time, due to the existence of the second one-way valve 39, the pressure in the lower piston chamber 332 of the piston cylinder 33 decreases, and the external air pressure is greater than the pressure in the lower piston chamber 332. Therefore, the external gas will enter the lower piston chamber 332 through the air supplement channel 37 and the first one-way valve 38. When pushing down the pressure adjustment lever 31, the piston 34 also moves downward accordingly. At this time, the pressure in the lower piston chamber 332 of the piston cylinder 33 increases, the first one-way valve 38 closes, and the liquid and gas in the lower piston chamber 332 will be injected into the hot water pipeline 4 through the second one-way valve 39. Since the water heater 1 has closed the switch valve 11, the pressure in the hot water pipeline 4 will increase. The user can repeatedly operate until the pointer on the pressure panel 362 indicates and rises to the position of the desired operation mode. After the pressure is maintained for the fourth preset time, the water heater 1 automatically switches to this operation mode and opens the switch valve 11.

[0120] When the user needs to decrease the pressure, the user only needs to connect the user-end outlet pipe 5 to the hot water pipeline 4 through the pipeline switching device 8, and then open the valve 51. At this time, the water in the hot water pipeline 4 will flow out. Since the water heater 1 has closed the switch valve 11, the water discharged from the valve 51 will cause the pressure in the hot water pipeline 4 to drop until the pressure gauge 36 indicates and drops to the desired function position. After the pressure is maintained for the fourth preset time, the water heater 1 automatically switches to this operation mode and opens the switch valve 11.

[0121] As described above, due to the setting of the specific structure of the terminal water pressure control device 3 in this embodiment, it adjusts the second water pressure of the hot water pipeline 4 by continuously pressurizing, that is, the terminal water pressure control device 3 adjusts the second water pressure of the hot water pipeline 4 to gradually rise and be located in different pressure threshold ranges to achieve the switching of the operation mode of the water heater 1. However, it is not limited to this. In other embodiments, the terminal water pressure control device 3 can also adjust the second water pressure of the hot water pipeline 4 by continuously depressurizing, or the terminal water pressure control device 3 can also directly adjust the change of the second water pressure of the hot water pipeline 4 in various forms, which can be adjusted according to the design requirements.

[0122] The present invention controls the terminal water pressure control device 3 at the user end 2 to adjust the second water pressure of the hot water pipeline 4, and adjusts the water heater 1 to be in the operation mode corresponding to this pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipeline 4 is located, that is, enables the user to directly adjust the operation mode of the water heater 1 at the user end 2, thereby realizing the remote control of the function switching of the water heater 1.

[0123] The present invention also has the following beneficial technical effects:

[0124] 1. By adjusting and changing the water pressure of the hot water pipeline 4, the signal transmission between the user terminal 2 and the water heater 1 is realized, which facilitates the user to adjust the functions of the water heater 1;

[0125] 2. A terminal water pressure control device 3 is designed at the user terminal 2, and the user can precisely adjust the water pressure of the hot water pipeline 4 through the terminal water pressure control device 3, thereby realizing the control of multiple operation modes;

[0126] 3. The water pressure change of the hot water pipeline 4 is less affected and restricted by the external environment, can effectively and reliably perform simple signal transmission, and has a low cost.

[0127] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A control method for a water heater system, characterized in that, The water heater system includes a water heater, a terminal water pressure control device at the user end, and a hot water pipeline connecting the water heater and the user end. The control method includes: S1. Close the valve on the user end outlet pipe at the user end, and detect the first water pressure of the hot water pipeline through a first pressure sensor. S2. Determine whether to enter the pressure control mode according to the change of the first water pressure of the hot water pipeline. If so, go to step S3; if not, return to step S1. S3. Adjust the second water pressure of the hot water pipeline by controlling the terminal water pressure control device, and adjust the water heater to operate in a mode corresponding to the pressure threshold range according to the different pressure threshold ranges where the second water pressure of the hot water pipeline is located.

2. The control method of the water heater system according to claim 1, characterized in that: In step S1, it further includes obtaining the average water pressure of the hot water pipeline within a first preset time. In step S2, it further includes that when within a second preset time, the first water pressure appears greater than the sum of the average water pressure and the preset water pressure for multiple times, enter the pressure control mode.

3. The control method of the water heater system according to claim 2, characterized in that, The first preset time is 5 minutes - 15 minutes; the second preset time is 3 seconds - 5 seconds.

4. The control method of the water heater system according to claim 1, characterized in that: When in the pressure control mode, the switch valve at the water inlet of the water heater is in a closed state to keep the hot water pipeline in a closed state. The switch valve is used to control the connection state between the hot water pipeline and the water supply pipeline.

5. The control method of the water heater system according to claim 4, characterized in that, In step S3, the operation mode of the water heater at least includes a closed mode. When in the closed mode, open the switch valve to exit the pressure control mode.

6. The control method of the water heater system according to claim 5, characterized in that, Before step S3, it further includes: Judge whether the duration of entering the pressure control mode is less than a third preset time. If so, enter step S3; if not, open the switch valve to exit the pressure control mode; wherein, the third preset time is less than or equal to 2 minutes.

7. The control method of the water heater system according to claim 5, characterized in that: The operation mode of the water heater further includes a temperature increase mode, a temperature decrease mode, and a temperature holding mode.

8. The control method of the water heater system according to claim 1, characterized in that, In step S3, it further includes that when the time for the second water pressure of the hot water pipeline to be within the same pressure threshold range is greater than a fourth preset time, adjust the water heater to operate in a mode corresponding to the pressure threshold range, wherein the fourth preset time is greater than or equal to 3 seconds.

9. A water heater system, characterized in that, The water heater system adopts the control method of the water heater system according to any one of claims 1 - 8. The terminal water pressure control device includes: A pressure adjusting rod; A piston assembly, the piston assembly includes a piston cylinder and a piston located in the piston cylinder. The pressure adjusting rod is connected to the piston. The pressure adjusting rod drives the piston to move up and down along the height direction of the piston cylinder in the piston cylinder. The piston divides the piston cylinder into an upper piston chamber and a lower piston chamber along the height direction. The lower piston chamber is communicated with the hot water pipeline through a connecting pipe. A pressure gauge, one end of the pressure gauge is provided with a second pressure sensor, the second pressure sensor is used to detect the second water pressure of the hot water pipeline, the other end of the pressure gauge is provided with a pressure panel, and indication marks corresponding to different operating modes are provided on the pressure panel.

10. The water heater system according to claim 9, wherein, A communication cavity communicating the upper piston cavity and the lower piston cavity is provided in the piston, and the terminal water pressure control device further includes: An air supplement channel, the air supplement channel communicates the upper piston cavity and the external space of the user end; A first one-way valve, the first one-way valve is located in the communication cavity and is used to block the medium in the lower piston cavity from flowing back to the upper piston cavity; A second one-way valve, the second one-way valve is located in the communication pipe and is used to block the medium in the hot water pipeline from flowing back to the lower piston cavity.

Images