An electric water heater with function of preventing inner tank water pressure from being too high

Abstract

The present invention discloses an electric water heater with the function of preventing the water pressure of the inner tank from being too high, which comprises an inner tank, an electric heating component, a water pressure sensor, a pressure relief device and a controller, wherein the electric heating component is arranged in the inner tank; the water pressure sensor is used to detect the water pressure of the inner tank; the pressure relief device comprises a pressure relief valve body, an electric valve core component and a Hall sensor, the pressure relief valve body is provided with a pressure relief channel, a pressure relief water outlet and a pressure relief water inlet, the electric valve core component is arranged in the pressure relief channel, the controller is configured to receive the signal of the water pressure sensor and control the electric valve core component to connect or disconnect the valve pressure relief channel, and the controller is configured to receive the signal of the Hall sensor and the water pressure sensor and control the electric heating component to stop heating. The inner tank can be depressurized, effectively solving the problem of excessive water pressure in the inner tank, and it can judge whether the pressure relief device is damaged, thereby improving safety.

Description

Technical Field

[0001] The invention relates to the field of water heaters, and in particular to an electric water heater with a function of preventing the inner tank water pressure from being too high. Background Art

[0002] During the heating process of the electric water heater, if the pressure relief valve fails for some reason and the user closes the inlet and outlet pipes, the water pressure in the inner tank will be too high, resulting in leakage and explosion of the inner tank, which has a serious impact on the safety of the user. The existing products cannot detect whether the pressure relief valve is damaged. If the pressure relief valve is damaged and the user does not replace it in time, it may cause leakage or explosion of the inner tank, which has certain safety hazards. At the same time, when the existing electric water heater products are heated, the pressure relief valve will drip all the time. Moreover, the existing pressure relief valves all need to open a pressure relief through hole on the inner tank, which weakens the structural strength and waterproofness of the inner tank and also increases the manufacturing cost. Summary of the invention

[0003] The object of the present invention is to provide an electric water heater with a function of preventing the inner tank water pressure from being too high, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] An electric water heater with a function of preventing the water pressure in an inner tank from being too high, comprising: an inner tank, an electric heating component, a water pressure sensor, a pressure relief device and a controller, wherein the electric heating component is arranged in the inner tank; the water pressure sensor is arranged in the inner tank, and the water pressure sensor is used to detect the water pressure of the inner tank; the pressure relief device comprises a pressure relief valve body, an electric valve core component, and a Hall sensor, wherein the pressure relief valve body is provided with a pressure relief channel, a pressure relief water outlet and a pressure relief water inlet communicated with the pressure relief channel, the electric valve core component is arranged in the pressure relief channel, and the Hall sensor is used to detect the water flow rate flowing through the pressure relief channel; the controller is electrically connected to the Hall sensor, the electric valve core component, the water pressure sensor, and the electric heating component at the same time, and the controller is configured to receive a signal from the water pressure sensor and control the electric valve core component to connect or disconnect the valve pressure relief channel, and the controller is configured to receive signals from the Hall sensor and the water pressure sensor and control the electric heating component to stop heating.

[0006] The beneficial effects of the present invention are as follows: when in use, the electric heating component heats the water in the inner tank, and when the water pressure sensor detects that the water pressure in the inner tank exceeds a preset value, the controller controls the electric valve core component to connect the valve pressure relief channel, and the water in the inner tank can be discharged from the pressure relief channel to achieve pressure relief; when the water pressure sensor detects that the water pressure in the inner tank is less than a preset value, the controller controls the electric valve core component to disconnect the valve pressure relief channel; in addition, during the pressure relief process of the pressure relief channel, the Hall sensor detects the water flow rate flowing through the pressure relief outlet, that is, detects whether the water in the inner tank flows out from the pressure relief outlet. If the Hall sensor detects that there is no water and the water pressure in the inner tank remains unchanged, it proves that the electric valve core component is damaged at this time, and the controller controls the electric heating component to stop heating. The present invention can relieve the pressure of the inner tank, effectively solve the problem of excessive water pressure in the inner tank, and can judge whether the pressure relief device is damaged, thereby improving safety.

[0007] It can be seen that the electric water heater with the function of preventing the inner tank water pressure from being too high provided by the present invention can be used as a hardware architecture to automatically and effectively release pressure and determine whether the pressure relief device is damaged.

[0008] As a further improvement of the above technical solution, the electric valve core assembly includes a first pressure relief spring, an electromagnet, a first pressure relief plug, and a magnetic block. The first pressure relief plug and the first pressure relief spring are arranged in the pressure relief channel. One end of the first pressure relief spring abuts against the first pressure relief plug, and the other end of the first pressure relief spring abuts against the inner wall of the pressure relief valve body. The first pressure relief spring is used to push the first pressure relief plug to block the pressure relief outlet. The electromagnet is arranged at one end of the first pressure relief spring away from the first pressure relief plug. The magnetic block is arranged on the first pressure relief plug. The electromagnet is electrically connected to the controller. The controller is configured to receive a signal from the water pressure sensor and control the electromagnet to be powered on or off.

[0009] When pressure relief is required, the controller controls the electromagnet to be energized, and the electromagnet generates a magnetic field that attracts the magnetic block. The magnetic block drives the first pressure relief plug to move and open the pressure relief outlet. The first pressure relief spring is compressed, and the water in the inner tank can be discharged from the pressure relief outlet to achieve the pressure relief effect. After the pressure relief is completed, the electromagnet is powered off, the electromagnet stops working, and the first pressure relief plug is reset under the action of the first pressure relief spring to block the pressure relief outlet.

[0010] As a further improvement of the above technical solution, the pressure relief device also includes a water inlet valve body, a water inlet plug, and a water inlet spring. The water inlet valve body is provided with a water inlet chamber, a water inlet end connected to the water inlet chamber, a water outlet end and a pressure relief port end. The pressure relief water inlet is connected to the pressure relief port end, and the water outlet end is connected to the inner tank. The water inlet plug and the water inlet spring are arranged in the water inlet chamber, one end of the water inlet spring abuts against the water inlet plug, and the other end of the water inlet spring abuts against the interior of the water inlet valve body. The water inlet spring is used to push the first pressure relief plug to seal the water inlet end.

[0011] At this time, the pressure relief valve body can be connected to the water inlet valve body, so there is no need to drill a hole in the inner tank, only the water inlet hole needs to be drilled; when in use, the water inlet pipe is connected to the water inlet end. When water is inletted, the water pressure pushes the water inlet plug, and the water inlet spring is compressed. At this time, the water flows into the water inlet cavity from the gap between the water inlet plug and the water inlet end, and then enters the inner tank from the water outlet end. When the inner tank is filled with water, the water inlet spring extends, the water inlet plug is pushed, and the water inlet plug blocks the water inlet end to stop water from entering.

[0012] As a further improvement of the above technical solution, the pressure relief device also includes a sliding rod and a second pressure relief spring. The water inlet plug is provided with a pressure relief hole. One end of the sliding rod passes through the pressure relief hole from the outside to the inside and extends into the water inlet chamber. The second pressure relief spring is sleeved on the outer periphery of the sliding rod. An abutment step is provided at the inner end of the sliding rod. One end of the second pressure relief spring abuts against the abutment step, and the other end of the second pressure relief spring abuts against the inner end surface of the water inlet plug. A second pressure relief plug is connected to the outer end of the sliding rod. The second pressure relief spring is used to push the sliding rod to move inward so that the second pressure relief plug blocks the pressure relief hole.

[0013] There is a gap between the slide bar and the pressure relief hole. When the pressure in the inner tank reaches a certain limit, the water pressure in the inner tank pushes the slide bar, and the second pressure relief spring is compressed. At this time, the water in the inner tank flows into the water inlet pipeline from the gap between the second pressure relief stopper and the pressure relief hole. When the pressure in the inner tank decreases, the second pressure relief spring extends, and the slide bar is pushed, driving the second pressure relief stopper to return to the original position to block the pressure relief hole.

[0014] As a further improvement of the above technical solution, the water outlet end and the water inlet end are arranged up and down, the water inlet stopper is connected with a sliding block, the sliding block slides up and down with the inner wall of the water inlet cavity, and a through hole corresponding to the pressure relief hole is arranged on the sliding block. During the water inlet process, the water inlet stopper can follow the sliding block to slide up and down in the water inlet cavity, thereby improving the stability and smoothness of the movement of the water inlet stopper.

[0015] As a further improvement of the above technical solution, a guide frame is fixedly installed in the water inlet cavity, and the slide rod is slidably connected to the guide frame. The guide frame mainly guides the slide rod.

[0016] As a further improvement of the above technical solution, the first pressure relief stopper is slidably matched with the pressure relief channel. The first pressure relief stopper can slide in the pressure relief channel, thereby improving the stability and smoothness of the movement of the first pressure relief stopper.

[0017] As a further improvement of the above technical solution, the electric water heater further comprises an alarm connected to the controller. When the pressure relief device is damaged, the alarm sounds to serve as a reminder.

[0018] As a further improvement of the above technical solution, the electric heating assembly includes an electric heating tube arranged in the inner pot, and the water in the inner pot is heated by the electric heating tube.

[0019] As a further improvement of the above technical solution, a heat-insulating layer is wrapped around the outer periphery of the inner container, and an outer shell is sheathed around the outer periphery of the heat-insulating layer. The heat-insulating layer can protect the hot water in the inner container. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 is a cross-sectional view of an embodiment of the electric water heater provided by the present invention;

[0022] Figure 2 is a cross-sectional view of an embodiment of the pressure relief device provided by the present invention when there is no pressure relief;

[0023] Figure 3 The present invention provides a pressure relief device, and a cross-sectional view of one embodiment thereof during pressure relief. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figures 1 to 3 The electric water heater with the function of preventing the inner tank water pressure from being too high of the present invention is implemented as follows:

[0029] The electric water heater of this embodiment includes: an inner tank 100 , an electric heating component, a water pressure sensor 200 , a pressure relief device 300 and a controller 500 .

[0030] The electric heating assembly includes an electric heating tube 600 disposed in the inner pot 100. When in use, the water in the inner pot 100 is heated by the electric heating tube 600. In some other embodiments, other heating elements, such as heating wires, etc., may be used.

[0031] The inner container 100 is wrapped with a heat preservation layer 110 , and the outer container 120 is sheathed on the outer container 110 . The heat preservation layer 110 can protect the hot water in the inner container 100 .

[0032] The water pressure sensor 200 is disposed in the inner container 100 , and the water pressure sensor 200 is used to detect the water pressure of the inner container 100 .

[0033] The pressure relief device 300 of this embodiment includes a pressure relief valve body 310, an electric valve core assembly, and a Hall sensor 330. The pressure relief valve body 310 is provided with a pressure relief channel 311, a pressure relief water outlet 312 and a pressure relief water inlet 313 connected to the pressure relief channel 311, the electric valve core assembly is arranged in the pressure relief channel 311, and the Hall sensor 330 is used to detect the water flow flowing through the pressure relief channel 311. The Hall sensor 330 can be arranged at the pressure relief water outlet 312 and the pressure relief water inlet 313. The embodiment is arranged at the pressure relief outlet 312, and the controller 500 is electrically connected to the Hall sensor 330, the electric valve core assembly, the water pressure sensor 200, and the electric heating assembly at the same time. The controller 500 is configured to receive the signal of the water pressure sensor 200 and control the electric valve core assembly to connect or disconnect the valve pressure relief channel 311, and the controller 500 is configured to receive the signal of the Hall sensor 330 and the water pressure sensor 200 and control the electric heating assembly to stop heating.

[0034] The electric valve core assembly is used to connect or disconnect the valve pressure relief channel 311. Specifically, the electric valve core assembly includes a first pressure relief spring 320, an electromagnet 340, a first pressure relief plug 350, and a magnetic block 360. The first pressure relief plug 350 and the first pressure relief spring 320 are arranged in the pressure relief channel 311. One end of the first pressure relief spring 320 abuts against the first pressure relief plug 350, and the other end of the first pressure relief spring 320 abuts against the inner wall of the pressure relief valve body 310. The first pressure relief spring 320 is used to push the first pressure relief plug 350 to block the pressure relief outlet 312. The electromagnet 340 is arranged at one end of the first pressure relief spring 320 away from the first pressure relief plug 350. The magnetic block 360 is arranged on the first pressure relief plug 350. The electromagnet 340 is electrically connected to the controller 500. The controller 500 is configured to receive a signal from the water pressure sensor 200 and control the electromagnet 340 to be powered on or off.

[0035] In order to improve the stability and smoothness of the movement of the first pressure relief plug 350 , the first pressure relief plug 350 is slidably matched with the pressure relief channel 311 .

[0036] When the water pressure sensor 200 detects that the water pressure of the inner tank 100 exceeds the preset value, the controller 500 controls the electromagnet 340 to be energized, the electromagnet 340 generates a magnetic field that attracts the magnetic block 360, and the magnetic block 360 drives the first pressure relief stopper 350 to move and open the pressure relief outlet 312, the first pressure relief spring 320 is compressed, and the water in the inner tank 100 can be discharged from the pressure relief outlet 312 to achieve the pressure relief effect; when the water pressure sensor 200 detects that the water pressure of the inner tank 100 is less than the preset value, the controller 500 controls the electromagnet 340 to be powered off, the electromagnet 340 stops working, and the first pressure relief stopper 350 is compressed after the first pressure relief spring 320 is compressed. It is reset by pressing down to block the pressure relief outlet 312; in addition, during the pressure relief process of the pressure relief channel 311, the Hall sensor 330 detects the water flow passing through the pressure relief outlet 312, that is, it detects whether the water in the inner tank 100 flows out from the pressure relief outlet 312. If the Hall sensor 330 detects that there is no water and the water pressure of the inner tank 100 remains unchanged, it proves that the electric valve core component is damaged at this time. The controller 500 controls the electric heating component to stop heating. The present invention can relieve the pressure of the inner tank 100, effectively solve the problem of excessive water pressure in the inner tank 100, and can determine whether the pressure relief device 300 is damaged, thereby improving safety.

[0037] Further, in order to reduce the number of holes in the inner tank 100, the pressure relief device 300 further includes a water inlet valve body 370, a water inlet stopper 380, and a water inlet spring 390. The water inlet valve body 370 is provided with a water inlet cavity 371, a water inlet end 372 connected to the water inlet cavity 371, a water outlet end 373 and a pressure relief end 374. The pressure relief water inlet 313 is connected to the pressure relief end 374, and the water outlet end 373 is connected to the inner tank 100. 00 is connected, the water inlet stopper 380 and the water inlet spring 390 are arranged in the water inlet cavity 371, one end of the water inlet spring 390 abuts against the water inlet stopper 380, and the other end of the water inlet spring 390 abuts against the inside of the water inlet valve body 370, and the water inlet spring 390 is used to push the first pressure relief stopper 350 to block the water inlet end 372. At this time, it is only necessary to open the water inlet hole. When in use, the water inlet pipeline is connected to the water inlet end 372. When water is inlet, the water pressure pushes the water inlet stopper 380, and the water inlet spring 390 is compressed. At this time, the water flows into the water inlet cavity 371 from the gap between the water inlet stopper 380 and the water inlet end 372, and then enters the inner liner 100 from the water outlet end 373. When the inner liner 100 is filled with water, the water inlet spring 390 extends, the water inlet stopper 380 is pushed, and the water inlet stopper 380 blocks the water inlet end 372 to stop water inlet. During pressure relief, since the water inlet chamber 371 is connected to the inner tank 100 , the water in the inner tank 100 can enter the pressure relief water inlet 313 through the water inlet chamber 371 .

[0038] Furthermore, in order to reduce the number of times the electric valve core assembly is actuated and to increase its service life, a pressure relief function is also added to the water inlet valve body 370. Specifically, the pressure relief device 300 also includes a slide rod 400 and a second pressure relief spring 410. The water inlet stopper 380 is provided with a pressure relief hole 381. One end of the slide rod 400 passes through the pressure relief hole 381 from the outside to the inside and extends into the water inlet cavity 371. The second pressure relief spring 410 is sleeved on the outer periphery of the slide rod 400. An abutting step 420 is provided at the inner end of the slide rod 400. One end of the second pressure relief spring 410 abuts against the abutting step 420. The second The other end of the pressure relief spring 410 abuts against the inner end surface of the water inlet stopper 380, and a second pressure relief stopper 430 is connected to the outer end of the slide bar 400. The second pressure relief spring 410 is used to push the slide bar 400 to move inward, so that the second pressure relief stopper 430 blocks the pressure relief hole 381. A gap is left between the slide bar 400 and the pressure relief hole 381. When the pressure of the inner liner 100 reaches a certain limit, the water pressure of the inner liner 100 pushes the slide bar 400, and the second pressure relief spring 410 is compressed. At this time, the water flow of the inner liner 100 enters the water inlet pipeline from the gap between the second pressure relief stopper 430 and the pressure relief hole 381. When the pressure of the inner liner 100 decreases, the second pressure relief spring 410 extends, and the slide bar 400 is pushed, driving the second pressure relief stopper 430 to return to block the pressure relief hole 381.

[0039] In addition, the water outlet end 373 and the water inlet end 372 are arranged up and down, and the water inlet stopper 380 is connected with a sliding block 382, ​​and the sliding block 382 is slidably matched with the inner wall of the water inlet cavity 371 up and down, and a through hole 383 corresponding to the pressure relief hole 381 is arranged on the sliding block 382. During the water inlet process, the water inlet stopper 380 can follow the sliding block 382 to slide up and down in the water inlet cavity 371, thereby improving the stability and smoothness of the movement of the water inlet stopper 380.

[0040] In order to improve the stability of the movement of the sliding rod 400 , a guide frame 375 is fixedly installed in the water inlet chamber 371 , and the sliding rod 400 is slidably connected to the guide frame 375 .

[0041] In some embodiments, the electric water heater further comprises an alarm connected to the controller 500. When the pressure relief device 300 is damaged, the alarm sounds to serve as a reminder.

[0042] In some embodiments, the problem of the electric water heater dripping during the heating process is solved by adjusting the preset water pressure value and releasing the pressure at a certain moment.

[0043] In some embodiments, the electric valve core assembly may adopt an electric valve core with other structures, such as an electric butterfly valve core, an electric flap valve core, etc.

[0044] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An electric water heater with the function of preventing the inner tank water pressure from being too high, characterized in that: It includes: Liner (100); An electric heating component is arranged in the inner container (100); A water pressure sensor (200) disposed in the inner container (100), the water pressure sensor (200) being used to detect the water pressure of the inner container (100); A pressure relief device (300), comprising a pressure relief valve body (310), an electric valve core assembly, and a Hall sensor (330); the pressure relief valve body (310) is provided with a pressure relief channel (311), a pressure relief water outlet (312) and a pressure relief water inlet (313) communicated with the pressure relief channel (311); the electric valve core assembly is arranged in the pressure relief channel (311); and the Hall sensor (330) is used to detect the water flow rate flowing through the pressure relief channel (311); a controller (500) which is electrically connected to the Hall sensor (330), the electric valve core assembly, the water pressure sensor (200), and the electric heating assembly at the same time; the controller (500) is configured to receive a signal from the water pressure sensor (200) and control the electric valve core assembly to connect or disconnect the valve pressure relief channel (311); and the controller (500) is configured to receive signals from the Hall sensor (330) and the water pressure sensor (200) and control the electric heating assembly to stop heating; The electric valve core assembly comprises a first pressure relief spring (320), an electromagnet (340), a first pressure relief plug (350), and a magnetic block (360). The first pressure relief plug (350) and the first pressure relief spring (320) are arranged in a pressure relief channel (311). One end of the first pressure relief spring (320) abuts against the first pressure relief plug (350), and the other end of the first pressure relief spring (320) abuts against the inner wall of the pressure relief valve body (310). The first pressure relief spring (320) is used to In order to push the first pressure relief stopper (350) to block the pressure relief water outlet (312), the electromagnet (340) is arranged at an end of the first pressure relief spring (320) away from the first pressure relief stopper (350), the magnetic block (360) is arranged on the first pressure relief stopper (350), the electromagnet (340) is electrically connected to the controller (500), and the controller (500) is configured to receive a signal from the water pressure sensor (200) and control the electromagnet (340) to be powered on or off; The pressure relief device (300) further comprises a water inlet valve body (370), a water inlet stopper (380), and a water inlet spring (390); the water inlet valve body (370) is provided with a water inlet cavity (371), a water inlet end (372) communicating with the water inlet cavity (371), a water outlet end (373), and a pressure relief port end (374); the pressure relief water inlet (313) is communicated with the pressure relief port end (374); the water outlet end (373) is connected to the pressure relief port end (374); 3) being in communication with the inner tank (100), the water inlet stopper (380) and the water inlet spring (390) being arranged in the water inlet cavity (371), one end of the water inlet spring (390) being in contact with the water inlet stopper (380), and the other end of the water inlet spring (390) being in contact with the interior of the water inlet valve body (370), and the water inlet spring (390) being used to push the first pressure relief stopper (350) to block the water inlet end (372); The pressure relief device (300) further comprises a slide rod (400) and a second pressure relief spring (410); the water inlet stopper (380) is provided with a pressure relief hole (381); one end of the slide rod (400) passes through the pressure relief hole (381) from the outside to the inside and extends into the water inlet cavity (371); the second pressure relief spring (410) is sleeved on the outer periphery of the slide rod (400); an abutting step (420) is provided at the inner end of the slide rod (400); one end of the second pressure relief spring (410) abuts against the abutting step (420); the other end of the second pressure relief spring (410) abuts against the inner end surface of the water inlet stopper (380); a second pressure relief stopper (430) is connected to the outer end of the slide rod (400); the second pressure relief spring (410) is used to push the slide rod (400) to move inward so that the second pressure relief stopper (430) blocks the pressure relief hole (381); The water outlet end (373) and the water inlet end (372) are arranged vertically, the water inlet stopper (380) is connected to a sliding block (382), the sliding block (382) is slidably matched with the inner wall of the water inlet cavity (371) up and down, and a through hole (383) corresponding to the pressure relief hole (381) is arranged on the sliding block (382); The first pressure relief stopper (350) is slidably engaged with the pressure relief channel (311).

2. The electric water heater with the function of preventing the inner tank water pressure from being too high according to claim 1, characterized in that: A guide frame (375) is fixedly installed in the water inlet chamber (371), and the sliding rod (400) is slidably connected to the guide frame (375).

3. The electric water heater with the function of preventing the inner tank water pressure from being too high according to claim 1, characterized in that: The electric water heater also includes an alarm connected to the controller (500).

4. The electric water heater with the function of preventing the inner tank water pressure from being too high according to claim 1, characterized in that: The electric heating component comprises an electric heating tube (600) arranged in an inner container (100).

5. The electric water heater with the function of preventing the inner tank water pressure from being too high according to claim 1, characterized in that: A heat-insulating layer (110) is wrapped around the outer periphery of the inner liner (100), and an outer shell (120) is sleeved around the outer periphery of the heat-insulating layer (110).

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