Valve assembly, electric water heater and water cut-off method of electric water heater

Abstract

The invention belongs to the field of electric water heaters, and discloses a valve assembly, an electric water heater and a water cut-off method of the electric water heater. The valve assembly comprises a valve seat body and a water sealing assembly, and the valve seat body is connected with the water sealing assembly; a water inlet channel, a water flow channel, a sealing cavity and a water outlet channel are arranged in the valve seat body. The water sealing assembly comprises an electromagnetic coil, a spring, a movable iron core, a sealing sliding seat, a water retaining disc and a sealing disc, a transverse cavity is formed in the other side of the sealing sliding seat, the movable iron core and the spring are installed in the transverse cavity, one end of the spring is connected to the side wall of the transverse cavity, the other end of the spring is connected with one end of the movable iron core, and a sealing piece is arranged at the other end of the movable iron core; the electromagnetic coil is arranged outside the transverse cavity in a surrounding mode, a pressurizing hole and a pressure relief hole are formed in the water retaining disc, the pressure relief hole horizontally corresponds to the sealing piece, and the water inlet channel is communicated with the water outlet channel through the sealing disc and the step face of the sealing cavity. When the electric water heater leaks electricity, water flowing out of the water outlet of the electric water heater can be blocked through the valve assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electric water heaters, and in particular to a valve assembly, an electric water heater and a water cut-off method for the electric water heater. Background Art

[0002] As people's living standards are improving, people's requirements for comfort in family life are getting higher and higher. Electrical products have made people's lives more convenient, and various electrical products have entered people's lives. Electric water heaters are widely used electrical appliances. Electric water heaters use electricity as energy, and transfer heat to the cold water in the inner tank by heating the heating tube to prepare hot water. However, after the electric water heater was introduced into the market, it was prone to leakage due to damage to the ground wire in the user's home or unreasonable installation. When the water heater leaks electricity, if the user is bathing at this time, water is a conductor and can easily lead the current to the human body, resulting in an electric shock accident. Therefore, there is an urgent need for an electric water heater that automatically cuts off the water when there is a leakage. Summary of the invention

[0003] Based on this, it is necessary to provide a valve assembly, an electric water heater and a water cut-off method for an electric water heater to address the above technical problems.

[0004] In a first aspect, a valve assembly is provided, the valve assembly comprising a valve seat body and a water sealing assembly, the valve seat body and the water sealing assembly being fixedly connected;

[0005] The valve seat body is provided with a water inlet channel, a water flow channel, a sealing cavity and a water outlet channel, and the water inlet channel and the sealing cavity are connected through the water flow channel;

[0006] The water sealing assembly comprises an electromagnetic coil, a spring, a movable iron core, a sealing slide, a water retaining plate and a sealing plate. One side of the sealing slide is embedded and installed in the sealing cavity along the side wall of the sealing cavity, and the water retaining plate and the sealing plate are clamped, and the water retaining plate and the sealing plate are fixed to the opposite side walls of the sealing slide in the sealing cavity. The other side of the sealing slide is a transverse cavity. The movable iron core and the spring are transversely installed in the transverse cavity. One end of the spring is connected to the side wall of the transverse cavity, and the other end of the spring is connected to one end of the movable iron core. A sealing member is provided at the other end of the movable iron core. The electromagnetic coil is surrounded and arranged outside the transverse cavity. The water retaining plate and the sealing plate are fixedly connected. A pressurizing hole and a pressure relief hole are provided on the water retaining plate. The water inlet channel and the sealing cavity are communicated through the pressurizing hole, and the sealing cavity and the water outlet channel are communicated through the pressure relief hole. The pressure relief hole corresponds to the seal horizontally, and the water flow channel is communicated with the water outlet channel through the step surface of the sealing plate and the sealing cavity.

[0007] As an optional embodiment, when the electromagnetic coil is powered off, the spring extends laterally, driving the movable iron core to move axially to the left, the sealing member blocks the pressure relief hole, and water flows into the sealing cavity through the pressurized hole. The water pressure in the sealing cavity pushes the water retaining plate and the sealing plate axially to the left, and the step surfaces of the sealing plate and the sealing cavity are sealed, blocking water from flowing from the water flow channel to the water outlet channel.

[0008] As an optional embodiment, when the electromagnetic coil is energized, the spring contracts laterally, driving the movable iron core to move axially to the right, the sealing member is separated from the pressure relief hole, water flows into the sealing cavity through the pressurized hole, and water flows from the sealing cavity to the water outlet channel through the pressure relief hole. The water pressure in the water outlet channel pushes the water retaining plate and the sealing plate axially to the right, so that the step surfaces of the sealing plate and the sealing cavity are opened, and water flows from the water flow channel to the water outlet channel.

[0009] As an optional implementation, the water retaining plate is provided with a middle limiting column and a side limiting column, and the water retaining plate is connected to the sealing plate through the middle limiting column and the side limiting column;

[0010] The pressure-applying hole is arranged on the side limiting column, and the pressure-relieving hole is arranged on the middle limiting column.

[0011] As an optional implementation, grooves are provided at both ends of the sealing disk to provide displacement rebound for the left-right movement of the sealing disk and the water retaining disk.

[0012] As an optional implementation, the valve assembly further includes a leakage inductance unit, which is disposed on the valve seat body and is used to sense whether the valve assembly is leaking electricity.

[0013] As an optional embodiment, the valve assembly further includes an internal thread insert and an external thread insert;

[0014] The internal thread insert is arranged at the upper end of the valve seat body, and the external thread insert is arranged at the lower end of the valve seat body, for fixing the valve assembly.

[0015] In a second aspect, an electric water heater is provided, the electric water heater comprising the valve assembly of the first aspect, the electric water heater further comprising a water heater body, a control module, a water flow detection unit, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe being arranged on the water heater body, the water flow detection unit being arranged in the water inlet pipe, the valve assembly being arranged in the water outlet pipe, and the control module being connected to the valve assembly, the water heater body and the water flow detection unit respectively;

[0016] The water flow detection unit is used to detect the water flow entering the water inlet pipe and send the water flow to the control module;

[0017] The valve assembly is used to detect whether the water heater body has leakage. When leakage is detected, a leakage signal is sent to the control module, and a power-off command issued by the control module is received to control the electromagnetic coil to be powered off. The spring is extended laterally to push the movable iron core axially to the left. The sealing member blocks the pressure relief hole. The water pressure in the sealing cavity pushes the water retaining disc and the sealing disc axially to the left. The sealing disc and the step surface of the sealing cavity are sealed to block water from flowing from the water inlet channel to the water outlet channel, thereby blocking water from the water heater body.

[0018] The control module is used to receive the water flow rate sent by the water flow detection unit, and determine whether the electric water heater is in a water-using state based on the water flow rate, and receive the leakage signal sent by the valve assembly, and send a power-off instruction to the valve assembly based on the leakage signal, thereby controlling the valve assembly to block the water flow from the water heater body.

[0019] As an optional implementation, the control module includes a processor, a low-voltage power supply module, a display module, a leakage detection module, an execution module, a water flow detection module, a relay module and a temperature measurement module;

[0020] The processor is respectively connected to the low-voltage power supply module, the display module, the leakage detection module, the execution module, the water flow detection module, the relay module and the temperature measurement module, the leakage detection module is connected to the leakage inductance unit, the water flow detection module is connected to the water flow detection unit, and the execution module is connected to the valve assembly;

[0021] The low-voltage power supply module is used to provide power to the control module;

[0022] The display module is used to display the leakage state and water outage state of the water heater body;

[0023] The leakage detection module is used to detect the leakage signal of the water heater body and send the leakage signal to the processor;

[0024] The execution module is used to receive the power-off instruction sent by the processor and control the valve assembly to power off;

[0025] The water flow detection module is used to receive the water flow rate sent by the water flow detection unit, and if the electric water heater is in use, send a water use signal of the electric water heater to the processor;

[0026] The relay module is used to receive an instruction from the processor and cut off the power supply of the electric water heater;

[0027] The temperature measuring module is used to detect the water temperature of the electric water heater and send the water temperature to the processor;

[0028] The processor is used to receive the water temperature and the leakage signal sent by the leakage detection module, and send a power-off instruction to the valve assembly through the execution module to control the valve assembly to block the water discharge of the electric water heater, and receive the water use signal sent by the water flow detection module to control the water source of the electric water heater to be disconnected.

[0029] In a third aspect, a water cut-off method for an electric water heater is provided, the water cut-off method being applied to the electric water heater in the second aspect, the method further comprising:

[0030] The leakage detection module detects the leakage signal of the water heater body and sends the leakage signal to the processor;

[0031] The processor sends a power-off command to the valve assembly through the execution module, the electromagnetic coil of the valve assembly is powered off, the spring extends laterally, driving the movable iron core to move axially to the left, the seal blocks the pressure relief hole, and the water pressure in the sealing chamber pushes the water retaining plate and the sealing plate axially to the left. The step surface between the sealing plate and the sealing chamber is sealed to block water from flowing from the water flow channel to the water outlet channel.

[0032] As an optional implementation, the method further includes:

[0033] Detecting the current signal of the driving circuit of the valve assembly. If the current signal is zero, it indicates that the valve assembly is successfully powered off and the water supply of the electric water heater is cut off.

[0034] If the current signal is not zero, the processor cuts off the power supply of the electric water heater through the relay module of the electric water heater.

[0035] As an optional implementation, the method further includes:

[0036] When the valve assembly is powered off successfully, the processor controls the display module of the electric water heater to display the leakage state and the water supply failure state of the electric water heater.

[0037] As an optional implementation, the method further includes:

[0038] When no leakage signal of the electric water heater is detected, the processor sends a power-on command to the valve assembly, the electromagnetic coil is energized, the spring contracts laterally, and the movable iron core is driven to move axially to the right, the seal is separated from the pressure relief hole, and water flows to the water outlet channel through the water relief hole. The water pressure in the water outlet channel pushes the water retaining plate and the sealing plate axially to the right, so that the step surfaces of the sealing plate and the sealing cavity are opened, and water flows from the water flow channel to the water outlet channel, and the number of rotations of the water wheel of the electric water heater within a preset time length is detected;

[0039] If the number of rotations is greater than a preset threshold value of the number of rotations, indicating that the electric water heater is in use, the leakage detection module is used to detect a leakage signal of the water heater body;

[0040] If the number of rotations is less than or equal to the preset rotation threshold, it indicates that the electric water heater is in a non-operating state, and the accumulated non-operating time is greater than or equal to the preset non-operating time, the electric water heater enters a standby state, otherwise, the step of detecting the number of rotations of the water wheel of the electric water heater within the preset time is executed.

[0041] The present application provides a valve assembly, an electric water heater, and a method for cutting off the water supply of an electric water heater. The technical solution provided by the embodiments of the present application at least brings the following beneficial effects: by controlling the on and off of the electromagnetic coil, the spring moves left and right, driving the movable iron core to move left and right, and the seal provided at the left end of the movable iron core can block the pressure relief hole or separate from the pressure relief hole. When the seal blocks the pressure relief hole, the water pressure in the sealing cavity pushes the water retaining plate and the sealing cavity to the left, and the step surface is sealed to block the water from flowing from the water flow channel to the water outlet channel. Thereby, the water outlet of the electric water heater can be blocked by the valve assembly. In this way, when the leakage detection module detects that a leakage occurs, the water source of the electric water heater is immediately cut off to eliminate the hidden danger of leakage, further ensure the safety of users, improve product safety, and thus improve user satisfaction.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A schematic diagram of the structure of a valve assembly provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the structure of an electric water heater provided in an embodiment of the present application;

[0046] Figure 3 A flow chart of a method for cutting off water supply to an electric water heater provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the structure of a control module provided in an embodiment of the present application.

[0048] The reference numerals are described as follows:

[0049] 1. Valve assembly; 11. Valve seat body; 111. Water inlet channel; 112. Water flow channel; 113. Sealing chamber; 114. Water outlet channel; 12. Water sealing assembly; 121. Electromagnetic coil; 122. Spring; 123. Active iron core; 1231. Sealing element; 124. Sealing slide; 125. Water retaining plate; 1251. Pressurizing hole; 1252. Pressure relief hole; 126. Sealing plate; 1261. Groove; 127. Intermediate limit Position column; 128, side limit column; 13, leakage inductor unit; 14, internal thread insert; 15, external thread insert; 2, water heater body; 3, control module; 31, processor; 32, low voltage power supply module; 33, display module; 34, leakage detection module; 35, execution module; 36, water flow detection module; 37, relay module; 38, temperature measurement module; 4, water flow detection unit; 5, water inlet pipe; 6, water outlet pipe. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] Figure 1 A schematic diagram of the structure of a valve assembly provided in an embodiment of the present application. The valve assembly 1 includes a valve seat body 11 and a water sealing assembly 12, and the valve seat body 11 and the water sealing assembly 12 are fixedly connected. The valve seat body 11 and the water sealing assembly 12 can be fixedly connected by screws.

[0052] The valve seat body 11 is provided with a water inlet channel 111, a water flow channel 112, a sealed cavity 113 and a water outlet channel 114. The water inlet channel 111 and the sealed cavity 113 are connected through the water flow channel 112. The sealed cavity 113 and the water outlet channel 114 are connected. The side wall of the sealed cavity 113 connecting the sealed cavity 113 and the water flow channel 112 can move left and right. When the side wall is located on the left side, the water flow of the valve seat body 11 enters from the water inlet channel 111, flows into the water flow channel 112, and then enters the sealed cavity 113. When the side wall is located on the right side, the water flow of the valve seat body 11 enters from the water inlet channel 111, flows into the water flow channel 112, and flows from the water flow channel 112 to the water outlet channel 114.

[0053] The water sealing assembly 12 includes an electromagnetic coil 121, a spring 122, a movable iron core 123, a sealing slide 124, a water retaining plate 125 and a sealing plate 126. One side of the sealing slide 124 is embedded and installed in the sealing cavity 113 along the side wall of the sealing cavity 113, and the water retaining plate 125 and the sealing plate 126 are clamped. The water retaining plate 125 and the sealing plate 126 are fixed to the opposite side walls of the sealing slide 124 in the sealing cavity 113. The other side of the sealing slide 124 is a transverse cavity. The movable iron core 123 and the spring 122 are transversely installed in the transverse cavity. One end of the spring 122 is connected to the side wall of the transverse cavity, and the other end of the spring 122 is connected to the side wall of the transverse cavity. One end is connected to one end of the movable iron core 123, and the other end of the movable iron core 123 is provided with a seal 1231. The electromagnetic coil 121 is surrounded and arranged outside the transverse cavity. The water retaining plate 125 and the sealing plate 126 are fixedly connected. The water retaining plate 125 is provided with a pressurizing hole 1251 and a pressure relief hole 1252. The water inlet channel 111 and the sealing cavity 113 are connected through the pressurizing hole 1251, and the sealing cavity 113 and the water outlet channel 114 are connected through the pressure relief hole 1252. The pressure relief hole 1252 corresponds horizontally to the seal 1231, and the water flow channel 112 is connected to the water outlet channel 114 through the step surface of the sealing plate 126 and the sealing cavity 113. Among them, the transverse cavity can be a cylindrical cavity. The seal 1231 can be a silicone seal. The pressure relief hole 1252 corresponds to the seal 1231 horizontally. After the movable iron core 123 moves to the left, the seal 1231 arranged at the left end of the movable iron core 123 can horizontally block the pressure relief hole 1252. The water retaining plate 125 and the sealing plate 126 can be fixedly connected through a limiting hole or a limiting column. The sealing plate 126 is arranged on the right side of the water retaining plate 125.

[0054] Furthermore, when the electromagnetic coil 121 is powered off, the spring 122 stretches laterally, driving the movable iron core 123 to move axially to the left, and the seal 1231 blocks the pressure relief hole 1252. Water flows into the sealed cavity 113 through the pressurized hole 1251. The water pressure in the sealed cavity 113 pushes the water retaining plate 125 and the sealing plate 126 axially to the left. The sealing plate 126 and the step surface of the sealed cavity 113 are sealed to block water from flowing from the water flow channel 112 to the water outlet channel 114. In this way, when the electromagnetic coil 121 is powered off, the spring 122 is not affected by the magnetic field of the electromagnetic coil 121 and begins to stretch laterally. The spring 122 drives the movable iron core 123 to move leftward, and the seal 1231 provided at the left end of the movable iron core 123 blocks the pressure relief hole 1252 corresponding to the horizontal direction. When water flows into the sealed cavity 113 from the pressurized hole 1251, the water pressure in the sealed cavity 113 increases, which pushes the water retaining plate 125 and the sealing plate 126 to move axially to the left. Since the water flow channel 112 and the water outlet channel 114 are sealed and connected through the step surface of the sealing plate 126 and the sealed cavity 113, after the water retaining plate 125 and the sealing plate 126 are pushed axially to the left, the step surface is sealed, so water cannot flow directly from the water flow channel 112 to the water outlet channel 114.

[0055] Further, when the electromagnetic coil 121 is energized, the spring 122 contracts laterally, driving the movable iron core 123 to move axially to the right, the seal 1231 is separated from the pressure relief hole 1252, and water flows into the sealed cavity 113 through the pressurized hole 1251, and the water flows from the sealed cavity 113 to the water outlet channel 114 through the pressure relief hole 1252. The water pressure in the water outlet channel 114 pushes the water retaining plate 125 and the sealing plate 126 axially to the right, so that the step surface of the sealing plate 126 and the sealed cavity 113 is opened, and water flows from the water flow channel 112 to the water outlet channel 114. In this way, when the electromagnetic coil 121 is energized, the spring 122 begins to contract laterally under the action of the magnetic field of the electromagnetic coil 121, and the contraction of the spring 122 drives the movable iron core 123 to move to the right. Originally, the seal 1231 at the left end of the movable iron core 123 blocks the pressure relief hole 1252. After moving to the right, the seal 1231 is separated from the pressure relief hole 1252, and the water in the sealed cavity 113 flows to the water outlet channel 114 through the pressure relief hole 1252. Since the cavity capacity of the water outlet channel 114 is greater than the cavity capacity of the sealed cavity 113, the water pressure in the water outlet channel 114 is greater than the water pressure in the sealed cavity 113. Under the action of the water pressure in the water outlet channel 114, the water retaining plate 125 and the sealing plate 126 are pushed axially to the right. The step surface of the sealing plate 126 and the sealed cavity 113 is opened, and a gap appears on the step surface. The water flow channel 112 and the water outlet channel 114 are connected through the step surface, and water flows from the water flow channel 112 to the water outlet channel 114.

[0056] Furthermore, the water retaining plate 125 is provided with a middle limiting column 127 and a side limiting column 128, and the water retaining plate 125 is connected to the sealing plate 126 through the middle limiting column 127 and the side limiting column 128. The water retaining plate 125 and the sealing plate 126 can also be fixedly connected through limiting holes.

[0057] The pressure-applying hole 1251 is disposed on the side limiting column 128 , and the pressure-relieving hole 1252 is disposed on the middle limiting column 127 .

[0058] Furthermore, grooves 1261 are provided at both ends of the sealing plate 126 to provide displacement rebound for the left and right movement of the sealing plate 126 and the water retaining plate 125 .

[0059] Furthermore, the valve assembly 1 further includes a leakage inductance unit 13, which is disposed on the valve seat body 11 and is used to sense whether the valve assembly 1 is leaking electricity. Thus, when the leakage inductance unit 13 detects that the valve assembly 1 is leaking electricity, the water flow to the water outlet channel 114 is cut off based on the power failure of the electromagnetic coil 121.

[0060] Furthermore, the valve assembly 1 further comprises an internal thread insert 14 and an external thread insert 15. The internal thread insert 14 is arranged at the upper end of the valve seat body 11, and the external thread insert 15 is arranged at the lower end of the valve seat body 11, for fixing the valve assembly 1.

[0061] The embodiment of the present application provides a valve assembly, which controls the on and off of the electromagnetic coil, moves the spring left and right, drives the movable iron core left and right, and the seal provided at the left end of the movable iron core can block the pressure relief hole or separate from the pressure relief hole. When the seal blocks the pressure relief hole, the water pressure in the sealing cavity pushes the water retaining plate and the sealing cavity to the left, and the step surface is sealed to block the water from flowing from the water flow channel to the water outlet channel. Thus, the water outlet of the electric water heater can be blocked by the valve assembly.

[0062] Figure 2 A schematic diagram of the structure of an electric water heater provided in an embodiment of the present application. The electric water heater includes a valve assembly 1 as shown in 1, and the electric water heater also includes a water heater body 2, a control module 3, a water flow detection unit 4, a water inlet pipe 5 and a water outlet pipe 6, wherein the water inlet pipe 5 and the water outlet pipe 6 are arranged on the water heater body 2, the water flow detection unit 4 is arranged in the water inlet pipe 5, the valve assembly 1 is arranged in the water outlet pipe 6, and the control module 3 is respectively connected to the valve assembly 1, the water heater body 2 and the water flow detection unit 4.

[0063] The water flow detection unit 4 is used to detect the water flow entering the water inlet pipe 5 and send the water flow to the control module 3. In this way, the water flow entering the electric water heater can be detected by the water flow detection unit 4, so as to determine whether the electric water heater is in use. The water flow detection unit 4 can be a Hall effect water flow sensor or other water flow sensors, which are not limited here.

[0064] The valve assembly 1 is used to detect whether the water heater body 2 has leakage. When leakage is detected, the leakage signal is sent to the control module 3, and the power-off command issued by the control module 3 is received, the electromagnetic coil 121 is controlled to be powered off, the spring 122 is stretched horizontally, and the movable iron core 123 is pushed axially to the left, the seal 1231 blocks the pressure relief hole 1252, and the water pressure in the sealing chamber 113 pushes the water retaining plate 125 and the sealing plate 126 axially to the left, and the sealing plate 126 and the step surface of the sealing chamber 113 are sealed, blocking water from flowing from the water flow channel 112 to the water outlet channel 114, and blocking the water outlet of the water heater body 2. In this way, the water outlet of the electric water heater can be turned on and off by controlling the power on and off of the electromagnetic coil 121 of the valve assembly 1.

[0065] The control module 3 is used to receive the water flow rate sent by the water flow detection unit 4, and judge whether the electric water heater is in a water use state based on the water flow rate, and receive the leakage signal sent by the valve assembly 1, and send a power-off command to the valve assembly 1 based on the leakage signal, and control the valve assembly 1 to block the water outlet of the water heater body 2. In this way, the control module 3 can control the conduction or blocking of the water outlet based on the leakage signal and the valve assembly 1. Therefore, when a leakage is detected, a leakage signal is immediately sent to control the valve assembly 1 to cut off the water source of the electric water heater. Eliminating the hidden danger of leakage further ensures user safety, improves product safety, and thus improves user satisfaction.

[0066] Furthermore, the control module 3 includes a processor 31 , a low-voltage power supply module 32 , a display module 33 , a leakage detection module 34 , an execution module 35 , a water flow detection module 36 , a relay module 37 and a temperature measurement module 38 .

[0067] The processor 31 is respectively connected to the low-voltage power supply module 32, the display module 33, the leakage detection module 34, the execution module 35, the water flow detection module 36, the relay module 37 and the temperature measurement module 38, the leakage detection module 34 is connected to the leakage inductor unit 13, the water flow detection module 36 is connected to the water flow detection unit 4, and the execution module 35 is connected to the valve assembly 1.

[0068] The low-voltage power supply module 32 is used to provide power to the control module 3 .

[0069] The display module 33 is used to display the leakage state and water outage state of the water heater body 2. In this way, the user can be informed that the electric water heater is in the leakage state and water outage state, and the electric water heater can be repaired as soon as possible.

[0070] The leakage detection module 34 is used to detect the leakage signal of the water heater body 2 and send the leakage signal to the processor 31 .

[0071] The execution module 35 is used to receive the power-off instruction sent by the processor 31 and control the valve assembly 1 to be powered off.

[0072] The water flow detection module 36 is used to receive the water flow rate sent by the water flow detection unit 4, and if the electric water heater is in use, send a water use signal of the electric water heater to the processor 31.

[0073] The relay module 37 is used to receive the instruction of the processor 31 and cut off the power supply of the electric water heater. When the electric water heater sends a leakage signal, if the electrical signal of the electromagnetic coil 121 of the valve assembly 1 is not cut off, the processor 31 sends an instruction to the relay module 37 to control the power supply of the electric water heater to be cut off. In this way, it is ensured that the electromagnetic coil 121 of the valve assembly 1 is powered off, and water will not flow out of the water outlet of the electric water heater. Among them, the relay module 37 can also be connected to the relay unit in the electric water heater to cut off the power supply of the electric water heater through the relay unit.

[0074] The temperature measuring module 38 is used to detect the water temperature of the electric water heater and send the water temperature to the processor 31. In this way, when the user sets the bath, it is measured in real time whether the water temperature reaches the user-set water temperature and sent to the processor 31.

[0075] The processor 31 is used to receive the leakage signal sent by the leakage detection module 34, and send a power-off instruction to the valve assembly 1 through the execution module 35, control the valve assembly 1 to block the water outlet of the electric water heater, and receive the water use signal sent by the water flow detection module 36 to control the water source of the electric water heater to be disconnected. In this way, the water-off function of the electric water heater in the event of leakage can be realized through the valve assembly 1, ensuring that the water source of the electric water heater is cut off when the user uses water, avoiding leakage, and ensuring the user's safe water use.

[0076] The following will be combined with a specific implementation method to describe in detail a method for cutting off the water supply of an electric water heater provided in an embodiment of the present application. The method for cutting off the water supply of an electric water heater is applied to Figure 2 The electric water heater shown. Figure 3 A flow chart of a method for cutting off water supply of an electric water heater provided in an embodiment of the present application, such as Figure 3 As shown, the specific steps are as follows:

[0077] Step 301: The leakage detection module detects the leakage signal of the water heater body and sends the leakage signal to the processor.

[0078] In practice, the electric water heater is prone to leakage due to damage to the ground wire in the user's home or unreasonable installation. When the water heater leaks, if the user is taking a bath at this time, water is a conductor and can easily lead the current to the human body, resulting in an electric shock accident. So, when the electric water heater leaks, it is necessary to immediately cut off the water source of the electric water heater to ensure the safety of the user. Therefore, during the operation of the electric water heater, it is necessary to detect in real time whether the electric water heater is leaking. The leakage detection module of the control module of the electric water heater can detect the leakage signal of the water heater body, and send the leakage signal to the processor of the control module of the electric water heater.

[0079] Furthermore, after the electric water heater is turned on, it first enters a standby state. Then, the processor of the control module controls the leakage detection module to perform leakage detection to determine whether the electric water heater has leakage.

[0080] In step 302, the processor sends a power-off command to the valve assembly through the execution module. The electromagnetic coil of the valve assembly is powered off, and the spring extends laterally, driving the movable iron core to move axially to the left. The seal blocks the pressure relief hole, and the water pressure in the sealing chamber pushes the water retaining plate and the sealing plate axially to the left. The step surfaces of the sealing plate and the sealing chamber are sealed, blocking water from flowing from the water flow channel to the water outlet channel.

[0081] In implementation, after the processor receives the leakage signal, it is necessary to cut off the water outflow from the water outlet of the water heater body. The processor closes the valve assembly through the execution module. That is to say, the processor sends a power-off command to the valve assembly through the execution module, the electromagnetic coil of the valve assembly is powered off, and the spring stretches laterally. The extension of the spring drives the movable iron core to move axially to the left. The seal set at the left end of the movable iron core blocks the pressure relief hole. The water pressure in the sealing cavity pushes the water retaining plate and the sealing plate axially to the left. The step surface of the sealing plate and the sealing cavity is sealed to block the water from flowing from the water flow channel to the water outlet channel. Then the water flow entering the electric water heater is blocked by the valve assembly, so that when the electric water heater leaks electricity, the water outflow of the electric water heater is blocked by the valve assembly, eliminating safety hazards, ensuring the safety of users, and improving the safety of the product.

[0082] Furthermore, in order to ensure that the valve assembly is successfully cut off from water, it is necessary to detect whether the electromagnetic coil of the valve assembly is successfully de-energized after the electromagnetic coil is de-energized. Then, by detecting the current signal of the driving circuit of the electromagnetic coil, it can be determined whether the driving circuit supplies power to the driving coil, thereby determining whether the electromagnetic coil is in a powered state.

[0083] Step A, detecting the current signal of the driving circuit of the valve assembly. If the current signal is zero, it indicates that the valve assembly is successfully powered off and the water supply of the electric water heater is cut off.

[0084] In practice, in order to ensure that the valve assembly is successfully cut off from water, it is necessary to further detect whether the electromagnetic coil of the valve assembly is successfully cut off from power after the electromagnetic coil is cut off from power. Since the method of controlling the water cut-off of the electric water heater through the valve assembly is to control the electromagnetic coil of the valve assembly to cut off power, the state of the electromagnetic coil can be judged by detecting the current signal of the driving circuit of the electromagnetic coil of the valve assembly through the current signal of the driving circuit. Therefore, the current signal of the driving circuit of the valve assembly is detected. If the current signal is zero, it indicates that the valve assembly is successfully cut off from power and the electric water heater is completely cut off from water.

[0085] Step B: if the current signal is not zero, the processor cuts off the power supply of the electric water heater through the relay module of the electric water heater.

[0086] In implementation, if the current signal in the driving circuit of the electromagnetic coil is not zero, it means that the driving circuit is still supplying power to the electromagnetic coil and driving the electromagnetic coil to operate. At this time, the electromagnetic coil is energized, the spring contracts laterally, the spring drives the movable iron core to move axially to the right, and the seal set at the right end of the movable iron core is separated from the pressure relief hole. Water flows from the sealing cavity to the water outlet channel through the pressure relief hole, and the water pressure in the water outlet channel pushes the water retaining disc and the sealing disc axially to the right, so that the step surface of the sealing disc and the sealing cavity is opened, the water flow channel and the water outlet channel are connected, and water flows from the water flow channel to the water outlet channel. In other words, when the electromagnetic coil is energized, the water outlet of the electric water heater can still discharge water, and the leakage current can easily lead the current to the human body through the water flow, thereby causing an electric shock accident. Therefore, when the valve assembly is not powered off, the processor needs to cut off the power supply of the electric water heater through the relay module of the electric water heater. In this way, it can be ensured that the valve assembly is powered off and the water outlet of the electric water heater is blocked.

[0087] Furthermore, when the valve assembly is successfully powered off, the processor controls the display module of the electric water heater to display the leakage state and water outage state of the electric water heater.

[0088] During implementation, after the valve assembly is successfully de-energized, that is, after the valve assembly blocks the water flow from the outlet of the electric water heater, the processor can control the display module of the electric water heater to display the leakage status and water outage status of the electric water heater, to remind the user that the electric water heater is in a leakage state, to avoid using the electric water heater at this time, and to repair it as soon as possible.

[0089] Furthermore, in order to avoid safety accidents caused by leakage of electric water heaters, it is necessary to detect whether the electric water heater is leaking in real time. When the electric water heater is not leaking, the processor can control the valve assembly to open through the execution module, and the control valve assembly does not block the water outlet of the electric water heater. The specific steps are as follows:

[0090] Step one: when no leakage signal of the electric water heater is detected, the processor sends a power-on command to the valve assembly, the electromagnetic coil is energized, the spring contracts laterally, and drives the movable iron core to move axially to the right. The seal is separated from the pressure relief hole, and water flows to the water outlet channel through the water relief hole. The water pressure in the water outlet channel pushes the water retaining plate and the sealing plate axially to the right, so that the step surfaces of the sealing plate and the sealing cavity open, and water flows from the water flow channel to the water outlet channel, and the number of rotations of the water wheel of the electric water heater within the preset time is detected.

[0091] In implementation, when the leakage signal of the electric water heater is not detected, the processor can control the valve assembly to open and not block the water outlet. The processor sends a power-on instruction of the electromagnetic coil to the valve assembly to control the electromagnetic coil to be powered on. Under the action of the magnetic field, the spring contracts laterally, and the spring contraction drives the movable iron core to move axially to the right. The seal set at the left end of the movable iron core is separated from the pressure relief hole, and water flows from the sealing cavity to the water outlet channel through the water leakage hole. The water pressure in the water outlet channel pushes the water retaining plate and the sealing plate axially to the right, so that the step surface of the sealing plate and the sealing cavity is opened, and water flows from the water flow channel to the water outlet channel. In this way, when the electric water heater does not leak or the leakage has been repaired, the power supply of the electromagnetic coil can be restored as soon as possible to shorten the heating time when the user uses water next time. At this time, the electric water heater can be used normally and the water outlet can discharge water normally. In the normal state of the electric water heater, it is also necessary to judge whether the electric water heater is in use and whether the user is using water. The number of rotations of the water wheel of the water flow detection unit of the electric water heater within a preset time can be detected. The preset time length may be 1 second, and the water flow detection unit may be a Hall effect water flow sensor. In subsequent steps, it is possible to determine whether the electric water heater is in use according to the number of rotations of the water wheel.

[0092] Step 2: If the number of rotations is greater than a preset threshold value of the number of rotations, indicating that the electric water heater is in use, the leakage detection module is executed to detect a leakage signal of the water heater body.

[0093] In implementation, the detected number of rotations is compared with the preset number of rotations threshold. If the number of rotations is greater than the preset number of rotations threshold, it means that the user is using water and the electric water heater is in use. In order to avoid leakage of the electric water heater during the user's use, it is necessary to perform leakage detection on the water heater body in real time to determine whether the electric water heater has leakage. Among them, the preset number of rotations threshold can be 2 circles. Therefore, if the number of rotations is greater than the preset number of rotations threshold, indicating that the electric water heater is in use, the leakage detection module is executed to detect the leakage signal of the water heater body.

[0094] Step three, if the number of rotations is less than or equal to the preset rotation threshold, it indicates that the electric water heater is in a non-operating state, and the accumulated non-operating time is greater than or equal to the preset non-operating time, the electric water heater enters the standby state, otherwise, execute the step of detecting the number of rotations of the water wheel of the electric water heater within the preset time.

[0095] In implementation, the detected number of rotations is compared with the preset number of rotations threshold. If the number of rotations is less than or equal to the preset number of rotations threshold, it indicates that the electric water heater is in a non-operating state and the user is not currently using the electric water heater. At this point, the non-operating time of the electric water heater can be accumulated. The accumulated non-operating time is compared with the preset non-operating time. If the non-operating time is greater than or equal to the preset non-operating time, the electric water heater can be controlled to enter a standby state. If the non-operating time is less than the preset non-operating time, it means that the non-operating time of the electric water heater is still short, and it is uncertain whether the user continues to not use the electric water heater at the moment. At this point, the number of rotations of the water wheel of the electric water heater within the preset time can be continued to be detected to determine whether the electric water heater is in use. Therefore, if the number of rotations is less than or equal to the preset number of rotations threshold, it indicates that the electric water heater is in a non-operating state, and the non-operating time is accumulated. If the non-operating time is greater than or equal to the preset non-operating time, the electric water heater enters a standby state, otherwise, the step of detecting the number of rotations of the water wheel of the electric water heater within the preset time is performed.

[0096] The embodiment of the present application provides a method for cutting off the water supply of an electric water heater, wherein a leakage detection module is used to detect whether the electric water heater has leakage. If leakage occurs, the control valve assembly blocks the water from flowing out of the water outlet of the electric water heater. In this way, when the leakage detection module detects leakage, the water supply of the electric water heater is immediately cut off, eliminating the hidden danger of leakage, further ensuring the safety of users, improving product safety, and thus improving user satisfaction.

[0097] It should be understood that although Figure 3 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 3 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0098] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related points, please refer to the description of other method embodiments.

[0099] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0100] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0101] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0102] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0103] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A valve assembly, characterized in that: The valve assembly (1) comprises a valve seat body (11) and a water sealing assembly (12), wherein the valve seat body (11) and the water sealing assembly (12) are fixedly connected; The valve seat body (11) is provided with a water inlet channel (111), a water flow channel (112), a sealing cavity (113) and a water outlet channel (114); the water inlet channel (111) and the sealing cavity (113) are connected via the water flow channel (112); The water sealing assembly (12) comprises an electromagnetic coil (121), a spring (122), a movable iron core (123), a sealing slide (124), a water retaining plate (125) and a sealing plate (126); one side of the sealing slide (124) is embedded in the sealing cavity (113) along the side wall of the sealing cavity (113), and the water retaining plate (125) and the sealing plate (126) are clamped together, and the water retaining plate (125) and the sealing plate (126) are fixed on opposite side walls of the sealing slide (124) in the sealing cavity (113); the other side of the sealing slide (124) is a transverse cavity; the movable iron core (123) and the spring (122) are transversely mounted in the transverse cavity; one end of the spring (122) is connected to the side wall of the transverse cavity; the other end of the spring (122) is connected to the side wall of the transverse cavity; The movable iron core (123) is connected to one end of the movable iron core (123), and a sealing member (1231) is provided at the other end of the movable iron core (123). The electromagnetic coil (121) is surrounded and arranged outside the transverse cavity. The water retaining plate (125) and the sealing plate (126) are fixedly connected. A pressurizing hole (1251) and a pressure relief hole (1252) are provided on the water retaining plate (125). The water inlet channel (111) and the sealed cavity (113) are connected through the pressurizing hole (1251), and the sealed cavity (113) and the water outlet channel (114) are connected through the pressure relief hole (1252). The pressure relief hole (1252) corresponds horizontally to the sealing member (1231), and the water flow channel (112) is connected to the water outlet channel (114) through the step surface of the sealing plate (126) and the sealed cavity (113).

2. The valve assembly according to claim 1, characterized in that When the electromagnetic coil (121) is powered off, the spring (122) stretches laterally, driving the movable iron core (123) to move axially to the left, and the sealing member (1231) blocks the pressure relief hole (1252). Water flows into the sealing chamber (113) through the pressurizing hole (1251). The water pressure in the sealing chamber (113) pushes the water retaining plate (125) and the sealing plate (126) axially to the left. The step surfaces of the sealing plate (126) and the sealing chamber (113) are sealed, thereby blocking water from flowing from the water flow channel (112) to the water outlet channel (114).

3. The valve assembly according to claim 1, characterized in that When the electromagnetic coil (121) is energized, the spring (122) contracts laterally, driving the movable iron core (123) to move axially to the right, the sealing member (1231) separates from the pressure relief hole (1252), and water flows into the sealing cavity (113) through the pressurizing hole (1251). Water flows from the sealing cavity (113) to the water outlet channel (114) through the pressure relief hole (1252). The water pressure in the water outlet channel (114) pushes the water retaining plate (125) and the sealing plate (126) axially to the right, so that the step surfaces of the sealing plate (126) and the sealing cavity (113) open, and water flows from the water flow channel (112) to the water outlet channel (114).

4. The valve assembly according to claim 1, characterized in that The water retaining plate (125) is provided with a middle limiting column (127) and a side limiting column (128), and the water retaining plate (125) is fixedly connected to the sealing plate (126) via the middle limiting column (127) and the side limiting column (128); The pressure-applying hole (1251) is arranged on the side limiting column (128), and the pressure-relieving hole (1252) is arranged on the middle limiting column (127).

5. The valve assembly according to claim 1, characterized in that Grooves (1261) are provided at both ends of the sealing disk (126) for providing displacement rebound for the left-right movement of the sealing disk (126) and the water retaining disk (125).

6. The valve assembly according to claim 1, characterized in that The valve assembly (1) further comprises a leakage inductance unit (13), wherein the leakage inductance unit (13) is arranged on the valve seat body (11), and the leakage inductance unit (13) is used to sense whether the valve assembly (1) has leakage.

7. The valve assembly according to claim 1, characterized in that The valve assembly (1) further comprises an internally threaded insert (14) and an externally threaded insert (15); The internal thread insert (14) is arranged at the upper end of the valve seat body (11), and the external thread insert (15) is arranged at the lower end of the valve seat body (11), and is used to fix the valve assembly (1).

8. An electric water heater, characterized in that: The electric water heater comprises a valve assembly (1) according to any one of claims 1 to 7, and further comprises a water heater body (2), a control module (3), a water flow detection unit (4), a water inlet pipe (5) and a water outlet pipe (6), wherein the water inlet pipe (5) and the water outlet pipe (6) are arranged on the water heater body (2), the water flow detection unit (4) is arranged in the water inlet pipe (5), the valve assembly (1) is arranged in the water outlet pipe (6), and the control module (3) is respectively connected to the valve assembly (1), the water heater body (2) and the water flow detection unit (4); The water flow detection unit (4) is used to detect the water flow entering the water inlet pipe (5) and send the water flow to the control module (3); The valve assembly (1) is used to detect whether the water heater body (2) has leakage. When leakage is detected, a leakage signal is sent to the control module (3), and a power-off command issued by the control module (3) is received to control the electromagnetic coil (121) to be powered off. The spring (122) extends laterally to push the movable iron core (123) axially to the left. The sealing member (1231) blocks the pressure relief hole (1252). The water pressure in the sealing chamber (113) pushes the water retaining plate (125) and the sealing plate (126) axially to the left. The sealing plate (126) and the step surface of the sealing chamber (113) are sealed to block water from flowing from the water flow channel (112) to the water outlet channel (114), thereby blocking water from flowing out of the water heater body (2). The control module (3) is used to receive the water flow rate sent by the water flow detection unit (4), and judge whether the electric water heater is in a water-using state based on the water flow rate, and receive the leakage signal sent by the valve component (1), and send a power-off instruction to the valve component (1) based on the leakage signal, thereby controlling the valve component (1) to block the water discharge of the water heater body (2).

9. The electric water heater according to claim 8, characterized in that: The control module (3) comprises a processor (31), a low-voltage power supply module (32), a display module (33), a leakage detection module (34), an execution module (35), a water flow detection module (36), a relay module (37) and a temperature measurement module (38); The processor (31) is respectively connected to the low-voltage power supply module (32), the display module (33), the leakage detection module (34), the execution module (35), the water flow detection module (36), the relay module (37) and the temperature measurement module (38); the leakage detection module (34) is connected to the leakage inductance unit (13); the water flow detection module (36) is connected to the water flow detection unit (4); and the execution module (35) is connected to the valve assembly (1); The low-voltage power supply module (32) is used to provide power to the control module (3); The display module (33) is used to display the leakage state and water outage state of the water heater body (2); The leakage detection module (34) is used to detect a leakage signal of the water heater body (2), and send the leakage signal to the processor (31); The execution module (35) is used to receive a power-off instruction issued by the processor (31) and control the valve assembly (1) to be powered off; The water flow detection module (36) is used to receive the water flow rate sent by the water flow detection unit (4), and if the electric water heater is in use, send a water use signal of the electric water heater to the processor (31); The relay module (37) is used to receive an instruction from the processor (31) and cut off the power supply of the electric water heater; The temperature measuring module (38) is used to detect the water temperature of the electric water heater and send the water temperature to the processor (1); The processor (31) is used to receive the water temperature and the leakage signal sent by the leakage detection module (34), and to send a power-off instruction to the valve component (1) through the execution module (35) to control the valve component (1) to block the water discharge of the electric water heater, and to receive the water use signal sent by the water flow detection module (36) to control the water source of the electric water heater to be disconnected.

10. A method for cutting off water supply of an electric water heater, characterized in that: The method is applied to the electric water heater according to any one of claims 8 to 9, and the method comprises: The leakage detection module detects the leakage signal of the water heater body and sends the leakage signal to the processor; The processor sends a power-off command to the valve assembly through the execution module, the electromagnetic coil of the valve assembly is powered off, the spring extends laterally, driving the movable iron core to move axially to the left, the seal blocks the pressure relief hole, and the water pressure in the sealing chamber pushes the water retaining plate and the sealing plate axially to the left. The sealing plate and the step surface of the sealing chamber are sealed to block water from flowing from the water flow channel to the water outlet channel.

11. The method according to claim 10, characterized in that The method further comprises: Detecting the current signal of the driving circuit of the valve assembly. If the current signal is zero, it indicates that the valve assembly is successfully powered off and the water supply of the electric water heater is cut off. If the current signal is not zero, the processor cuts off the power supply of the electric water heater through the relay module of the electric water heater.

12. The method according to claim 10, characterized in that The method further comprises: When the valve assembly is powered off successfully, the processor controls the display module of the electric water heater to display the leakage state and the water supply failure state of the electric water heater.

13. The method according to claim 10, characterized in that The method further comprises: When no leakage signal of the electric water heater is detected, the processor sends a power-on command to the valve assembly, the electromagnetic coil is energized, the spring contracts laterally, and the movable iron core is driven to move axially to the right, the seal is separated from the pressure relief hole, and water flows to the water outlet channel through the water relief hole. The water pressure in the water outlet channel pushes the water retaining plate and the sealing plate axially to the right, so that the step surfaces of the sealing plate and the sealing cavity are opened, and water flows from the water flow channel to the water outlet channel, and the number of rotations of the water wheel of the electric water heater within a preset time length is detected; If the number of rotations is greater than a preset threshold value of the number of rotations, indicating that the electric water heater is in use, the leakage detection module is used to detect a leakage signal of the water heater body; If the number of rotations is less than or equal to the preset rotation threshold, it indicates that the electric water heater is in a non-operating state, and the accumulated non-operating time is greater than or equal to the preset non-operating time, the electric water heater enters a standby state, otherwise, the step of detecting the number of rotations of the water wheel of the electric water heater within the preset time is executed.

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