An electric heating device and a water heater

Abstract

The utility model relates to water heater technical field, concretely is a kind of electric heating device and water heater. The electric heating device includes mounting seat, water inlet pipe, water outlet pipe, electric heating tube, electronic anode, and mounting seat is equipped with water inlet, water outlet and anode channel;Water inlet pipe, water outlet pipe, electric heating tube are all located in the first side of mounting seat, and water inlet pipe is communicated with water inlet;Water outlet pipe is communicated with water outlet;Electronic anode includes metal conductor and positive electrode connecting terminal, metal conductor is located in the first side of mounting seat, and positive electrode connecting terminal is located in the second side of mounting seat, and metal conductor one end passes through anode channel and is connected with positive electrode connecting terminal, and metal conductor is sealedly connected with anode channel. The water heater includes inner bag, and inner bag is plastic inner bag or cast plastic inner bag, and mounting mouth is equipped on inner bag, and the electric heating device as described above is equipped on mounting mouth. The utility model provides effective anticorrosive protection for water inlet pipe, water outlet pipe and electric heating tube by electronic anode.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, specifically an electric heating device and a water heater. Background Technology

[0002] In recent years, to meet consumers' demands for clean inner tanks, manufacturers have been vying to launch water heaters with plastic or enamel-lined inner tanks. These tanks avoid the problem of exposed iron due to enamel defects, unlike enamel-lined tanks, and therefore do not require magnesium rod protection. Water heaters with plastic inner tanks and no magnesium rods, thus eliminating "magnesium slag" contamination, are becoming increasingly popular. However, while plastic inner tanks eliminate the need for magnesium rods, the heating elements, inlet pipes, and outlet pipes are still made of stainless steel. Although stainless steel has some corrosion resistance, prolonged immersion in water can still cause corrosion to these metal components due to chloride ions in tap water or corrosive ions from groundwater, potentially leading to leaks and electrical malfunctions, posing a potential safety hazard to the water heater. Utility Model Content

[0003] The purpose of this utility model is to provide an electric heating device and a water heater to solve the problem that metal parts such as heating elements, inlet pipes, and outlet pipes in existing water heaters are at risk of corrosion due to long-term immersion in water.

[0004] To solve the above problems, the present invention provides the following technical solution: An electric heating device, comprising: Mounting base, wherein the mounting base is provided with an inlet, an outlet and an anode channel; A water inlet pipe is located on the first side of the mounting base and is connected to the water inlet. A water outlet pipe is located on the first side of the mounting base and is connected to the water outlet. An electric heating element is disposed on the first side of the mounting base and connected to the mounting base; An electronic anode includes a metal conductor and a positive terminal for connecting the metal conductor to a positive power supply. The metal conductor is disposed on a first side of the mounting base, and the positive terminal is disposed on a second side of the mounting base. One end of the metal conductor passes through the anode channel and is connected to the positive terminal. The metal conductor and the anode channel are sealed together.

[0005] As described above, in an electric heating device, the metal conductor includes a main body, a connecting portion disposed at one end of the main body, and a limiting portion extending outward in the circumferential direction along the connecting portion. A sealing element is provided between the metal conductor and the anode channel. The sealing element includes a first sealing portion disposed between the connecting portion and the inner wall of the anode channel, and a second sealing portion disposed between the limiting portion and the end of the anode channel.

[0006] In the electric heating device described above, a positioning seat and a locking member are sequentially provided at the end of the connecting part away from the limiting part. The positioning seat includes a positioning sleeve sleeved between the connecting part and the inner wall of the anode channel and a positioning baffle provided on the second side of the mounting base. The locking member is threadedly connected to the connecting part.

[0007] In the electric heating device described above, the positive electrode connection terminal is sleeved on the connection portion and located between the positioning seat and the locking member. A first gasket is provided between the positive electrode connection terminal and the positioning seat, and a second gasket is provided between the positive electrode connection terminal and the locking member.

[0008] In the electric heating device described above, the metal conductor includes a titanium substrate, and the outer periphery of the titanium substrate is provided with a corrosion-resistant conductive coating.

[0009] As described above, in an electric heating device, the water inlet pipe is provided with a first water inlet section extending horizontally, a second water inlet section extending downward, and a third water inlet section extending horizontally in sequence from near to far relative to the mounting base; the water outlet pipe is provided with a first water outlet section extending horizontally, a second water outlet section extending downward, a third water outlet section extending horizontally, and a fourth water outlet section extending upward in sequence from near to far relative to the mounting base; the electric heating tube is provided with two parallel first heating sections extending horizontally, two parallel second heating sections extending downward, and two parallel third heating sections extending horizontally and connected at their ends in sequence from near to far relative to the mounting base.

[0010] In the electric heating device described above, two third heating sections are located on both sides below the third water inlet section, and the lower side of the third water inlet section is provided with multiple water inlet holes.

[0011] The electric heating device described above further includes a temperature measuring tube, one end of which is closed on the first side of the mounting base, and the other end of which is open and connected to the mounting base.

[0012] This utility model also provides a water heater, including an inner tank, which is a plastic inner tank or a slush-molded inner tank, and an installation port is provided on the inner tank, on which an electric heating device as described above is provided.

[0013] The water heater described above further includes a mounting and fixing assembly, which includes a fixing seat disposed on one side of the mounting base and fixedly connected to the inner tank, a pressure cover disposed on the other side of the mounting base, a fixing and locking member connecting the fixing seat and the pressure cover, and a sealing ring disposed between the fixing seat and the mounting base.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention provides an electric heating device and water heater, wherein the mounting base is integrated with an inlet pipe, an outlet pipe, an electric heating element and an electronic anode, and the electronic anode provides effective anti-corrosion protection for metal parts such as the inlet pipe, outlet pipe and electric heating element that are immersed in water for a long time.

[0015] 2. The electric heating device and water heater provided by this utility model form an electric heating device by means of a mounting base, an inlet pipe, an outlet pipe, an electric heating tube, and an electronic anode. It can not only realize heating, water inlet and outlet, and corrosion protection functions at the same time, but also only needs to be connected to the inner tank by the mounting base. There is no need to open an interface on the inner tank, which greatly simplifies the overall structure and assembly process, reduces the process difficulty of adding an interface on the inner tank, and significantly reduces the impact of opening an interface on the strength and reliability of the plastic or slush-molded inner tank.

[0016] 3. The electric heating device and water heater provided by this utility model include a titanium matrix and a corrosion-resistant conductive coating in the electronic anode. The corrosion protection is highly reliable and will not produce "magnesium slag" pollution, effectively ensuring the cleanliness of the water. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an electric heating device according to an embodiment of the present utility model.

[0019] Figure 2 This is a cross-sectional view of an electric heating device according to an embodiment of the present utility model.

[0020] Figure 3 This is a cross-sectional view of a water heater according to an embodiment of the present utility model.

[0021] Figure 4 for Figure 3 Enlarged view of section A.

[0022] The corresponding numbers for the attached figures are as follows: 1. Mounting base; 11. Inlet; 12. Outlet; 13. Anode channel; 2. Inlet pipe; 21. First inlet section; 22. Second inlet section; 23. Third inlet section; 231. Inlet hole; 3. Outlet pipe; 31. First outlet section; 32. Second outlet section; 33. Third outlet section; 34. Fourth outlet section; 4. Heating element; 41. First heating section; 42. Second heating section; 43. Third heating section; 5. Electronic anode; 51. Metal conductor; 511. Main body; 512. Connecting part; 513. Limiting part; 52. Positive terminal; 61. Sealing element; 611. First sealing part; 612. Second sealing part; 62. Positioning seat; 621. Positioning sleeve; 622. Positioning baffle; 63. Locking element; 64. First gasket; 65. Second gasket; 7. Temperature measuring tube; 8. Mounting and fixing assembly; 81. Fixing seat; 82. Pressure cap; 83. Fixing and locking element; 84. Sealing ring; 9. Inner liner; 91. Mounting port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This embodiment provides an electric heating device applied in a water heater, including a mounting base 1, an inlet pipe 2, an outlet pipe 3, an electric heating element 4, and an electronic anode 5. The mounting base 1 is provided with an inlet 11, an outlet 12, and an anode channel 13. The inlet pipe 2 is located on the first side of the mounting base 1 and communicates with the inlet 11. The outlet pipe 3 is located on the first side of the mounting base 1 and communicates with the outlet 12. The electric heating element 4 is located on the first side of the mounting base 1 and connected to the mounting base 1. The electronic anode 5 includes a metal conductor 51 and a positive terminal 52 for connecting the metal conductor 51 to the positive terminal of a power source. The metal conductor 51 is located on the first side of the mounting base 1, and the positive terminal 52 is located on the second side of the mounting base 1. One end of the metal conductor 51 passes through the anode channel 13 and is connected to the positive terminal 52. The metal conductor 51 and the anode channel 13 are sealed together.

[0025] Specifically, in this embodiment, the first side of the mounting base 1 refers to the side that can extend into the inner cavity of the inner liner 9, and the second side of the mounting base 1 refers to the side away from the inner cavity of the inner liner 9. One end of the heating element 4 passes through the mounting base 1 and extends to the second side of the mounting base 1, and this end is connected to the heating element terminal.

[0026] Among them, the positive terminal 52 connects the metal conductor 51 to the positive terminal of the power supply. The positive terminal of the power supply is the positive output terminal of the protection system, that is, the positive output terminal of the control circuit. The control circuit can control and adjust the magnitude of the output current so that the metal conductor 51 has a suitable current, thereby achieving the corrosion protection effect of the "applied current cathodic protection method".

[0027] This embodiment provides an electric heating device. First, the mounting base 1 integrates an inlet pipe 2, an outlet pipe 3, an electric heating element 4, and an electronic anode 5. The electronic anode 5 provides effective corrosion protection for the metal components such as the inlet pipe 2, outlet pipe 3, and electric heating element 4, which are immersed in water for extended periods. Second, the mounting base 1, together with the inlet pipe 2, outlet pipe 3, electric heating element 4, and electronic anode 5, forms an electric heating device that simultaneously achieves heating, water inlet / outlet, and corrosion protection functions. Moreover, it only requires the mounting base 1 to connect to the inner liner 9, eliminating the need for additional interfaces on the inner liner 9. This greatly simplifies the overall structure and assembly process, reduces the difficulty of adding interfaces to the inner liner 9, and significantly reduces the impact of interfaces on the strength and reliability of plastic or slush-molded inner liners.

[0028] Furthermore, the metal conductor 51 includes a main body 511, a connecting portion 512 disposed at one end of the main body 511, and a limiting portion 513 extending outward in the circumferential direction along the connecting portion 512. A sealing element 61 is provided between the metal conductor 51 and the anode channel 13. The sealing element 61 includes a first sealing portion 611 disposed between the connecting portion 512 and the inner wall of the anode channel 13, and a second sealing portion 612 disposed between the limiting portion 513 and the end of the anode channel 13. Therefore, the first sealing portion 611, the connecting portion 512, and the inner wall of the anode channel 13 form a first sealing structure, and the second sealing portion 612, the limiting portion 513, and the end of the anode channel 13 form a second sealing structure, thereby ensuring the sealing effect between the metal conductor 51 and the anode channel 13. The sealing element 61 is made of an insulating material, such as rubber, silicone, or plastic, which ensures a good sealing effect between the metal conductor 51 and the anode channel 13 while meeting insulation requirements.

[0029] Furthermore, the first sealing part 611 is provided with a first mating protrusion protruding circumferentially toward the connecting part 512, and a second mating protrusion protruding circumferentially toward the inner wall of the anode channel 13. The first mating protrusion forms an interference fit between the first sealing part 611 and the connecting part 512, and the second mating protrusion forms an interference fit between the first sealing part 611 and the inner wall of the anode channel 13, thereby further improving the sealing effect.

[0030] Preferably, the main body 511, the connecting part 512 and the limiting part 513 are welded together to form a single unit, resulting in a stable and reliable structure.

[0031] Furthermore, a positioning seat 62 and a locking member 63 are sequentially provided at the end of the connecting portion 512 away from the limiting portion 513. The positioning seat 62 includes a positioning sleeve 621 sleeved between the connecting portion 512 and the inner wall of the anode channel 13, and a positioning baffle 622 provided on the second side of the mounting base 1. The locking member 63 is threadedly connected to the connecting portion 512. Specifically, the connecting portion 512 has external threads, and the locking member 63 has internal threads. The two are threadedly engaged, making installation convenient. The positioning seat 62 can effectively limit the connecting portion 512, making it stably engaged with the anode channel 13 without shaking. The locking member 63 can prevent the positioning seat 62 from moving axially along the connecting portion 512 and disengaging from the connecting portion 512. On the other hand, it can fix the positions of the connecting portion 512 and the limiting portion 513. After the locking member 63 completes locking, the limiting portion 513 presses against the second sealing portion 612 in the sealing member 61, ensuring effective sealing.

[0032] Furthermore, the positive terminal 52 is sleeved on the connecting portion 512 and located between the positioning seat 62 and the locking member 63. A first washer 64 is provided between the positive terminal 52 and the positioning seat 62, and a second washer 65 is provided between the positive terminal 52 and the locking member 63. This ensures a stable connection between the positive terminal 52 and the connecting portion 512. Its structure is simple and easy to install. The positive terminal 52 is made of conductive metal and includes a sleeve portion that engages with the connecting portion 512 and a positive terminal connection portion that connects to the positive power supply.

[0033] Furthermore, the metallic conductor 51 includes a titanium substrate, and the outer periphery of the titanium substrate is provided with a corrosion-resistant conductive coating. The corrosion-resistant conductive coating includes, but is not limited to, an iridium coating or a platinum coating. This provides highly reliable corrosion protection and does not generate "magnesium slag" pollution, effectively ensuring the cleanliness of the water.

[0034] Furthermore, the water inlet pipe 2, relative to the mounting base 1, is provided with a first water inlet section 21 extending horizontally, a second water inlet section 22 extending downward, and a third water inlet section 23 extending horizontally in sequence from near to far; the water outlet pipe 3, relative to the mounting base 1, is provided with a first water outlet section 31 extending horizontally, a second water outlet section 32 extending downward, a third water outlet section 33 extending horizontally, and a fourth water outlet section 34 extending upward in sequence from near to far; the electric heating tube 4, relative to the mounting base 1, is provided with two parallel first heating sections 41 extending horizontally, two parallel second heating sections 42 extending downward, and two parallel third heating sections 43 extending horizontally and connected at their ends in sequence from near to far.

[0035] In this embodiment, the top of the inner tank 9 after the electric heating device is installed is considered upward, and the bottom of the inner tank 9 is considered downward. The inlet pipe 2, outlet pipe 3, and heating element 4 all extend horizontally first, then downward, and then horizontally again, with consistent extension trajectories. This ensures that all components can easily and uniformly enter the inner cavity of the inner tank 9 through the installation port 91 during installation. Specifically, the inlet pipe 2 extends horizontally first, then downward, and then horizontally again, with the third inlet section 23 located closest to the bottom of the inner tank 9. This helps reduce interference with the hot water layer of the inner tank 9, thereby improving the hot water output rate of the water heater. Similarly, the outlet pipe 3 extends horizontally first, then downward, then horizontally again, and finally upward, with the end of the fourth outlet section 34 located closest to the top of the inner tank 9. This design is based on the physical principle that hot water rises; cold water is injected from the bottom of the inner tank, pushing the hot water in the inner tank upward in a laminar flow and exiting through the outlet pipe, thus improving the hot water output rate of the water heater. Among them, the electric heating tube 4 first extends horizontally and then downwards and then horizontally again. The two third heating sections 43 are located at the position closest to the bottom of the inner tank 9 to heat the water, which can heat as much water as possible, thereby improving the hot water output rate of the water heater.

[0036] Furthermore, the two third heating sections 43 are located on the lower sides of the third water inlet section 23, and the lower side of the third water inlet section 23 is provided with multiple water inlet holes 231. Thus, after cold water enters the inner cavity of the inner tank 9 through the multiple water inlet holes 231 in the third water inlet section 23, it can be injected to the bottom of the inner tank 9, reducing interference with the original hot water layer and improving the hot water utilization rate.

[0037] Furthermore, the electric heating device in this embodiment also includes a temperature measuring tube 7, one end of which is closed on the first side of the mounting base 1, and the other end of which is open and connected to the mounting base 1. The temperature measuring tube is a blind tube structure and is made of metal tube so that the temperature measuring probe can be inserted to detect the water temperature of the inner tank 9.

[0038] Please see Figures 1 to 4This embodiment also provides a water heater, including an inner tank 9, which is a plastic or slush-molded inner tank. The inner tank 9 has an installation port 91, on which an electric heating device as described above is installed. Firstly, the mounting base 1 integrates an inlet pipe 2, an outlet pipe 3, an electric heating element 4, and an electronic anode 5. The electronic anode 5 provides effective corrosion protection for the metal components such as the inlet pipe 2, outlet pipe 3, and electric heating element 4, which are constantly immersed in water. Secondly, the mounting base 1, together with the inlet pipe 2, outlet pipe 3, electric heating element 4, and electronic anode 5, forms an electric heating device that simultaneously achieves heating, water inlet / outlet, and corrosion protection functions. Furthermore, it only requires connection between the mounting base 1 and the inner tank 9, eliminating the need for additional interfaces on the inner tank 9. This greatly simplifies the overall structure and assembly process, reduces the difficulty of adding interfaces to the inner tank 9, and significantly reduces the impact of interfaces on the strength and reliability of plastic or slush-molded inner tanks.

[0039] Furthermore, the water heater also includes a mounting and fixing assembly 8, which includes a fixing base 81 located on one side of the mounting seat 1 and fixedly connected to the inner tank 9, a pressure cover 82 located on the other side of the mounting seat 1, a fixing and locking member 83 connecting the fixing base 81 and the pressure cover 82, and a sealing ring 84 located between the fixing base 81 and the mounting seat 1. The structure is simple, easy to install, and structurally stable. The fixing and locking member 83 is a bolt, which can be connected to a terminal block to connect to the negative terminal of the power supply.

[0040] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An electric heating device, characterized in that, include: Mounting base (1), which is provided with an inlet (11), an outlet (12) and an anode channel (13); Water inlet pipe (2) is located on the first side of the mounting base (1) and is connected to the water inlet (11); The water outlet pipe (3) is located on the first side of the mounting base (1) and is connected to the water outlet (12); An electric heating element (4) is disposed on the first side of the mounting base (1) and connected to the mounting base (1); The electronic anode (5) includes a metal conductor (51) and a positive terminal (52) for connecting the metal conductor (51) to the positive terminal of the power supply. The metal conductor (51) is located on the first side of the mounting base (1), and the positive terminal (52) is located on the second side of the mounting base (1). One end of the metal conductor (51) passes through the anode channel (13) and is connected to the positive terminal (52). The metal conductor (51) is sealed to the anode channel (13).

2. The electric heating device according to claim 1, characterized in that, The metal conductor (51) includes a main body (511), a connecting portion (512) disposed at one end of the main body (511), and a limiting portion (513) extending outward in the circumferential direction along the connecting portion (512). A sealing member (61) is provided between the metal conductor (51) and the anode channel (13). The sealing member (61) includes a first sealing portion (611) disposed between the connecting portion (512) and the inner wall of the anode channel (13), and a second sealing portion (612) disposed between the limiting portion (513) and the end of the anode channel (13).

3. The electric heating device according to claim 2, characterized in that, The end of the connecting part (512) away from the limiting part (513) is provided with a positioning seat (62) and a locking member (63) in sequence. The positioning seat (62) includes a positioning sleeve (621) sleeved between the connecting part (512) and the inner wall of the anode channel (13) and a positioning baffle (622) provided on the second side of the mounting base (1). The locking member (63) is threadedly connected to the connecting part (512).

4. An electric heating device according to claim 3, characterized in that, The positive terminal (52) is sleeved on the connecting part (512) and located between the positioning seat (62) and the locking member (63). A first gasket (64) is provided between the positive terminal (52) and the positioning seat (62), and a second gasket (65) is provided between the positive terminal (52) and the locking member (63).

5. An electric heating device according to claim 1, characterized in that, The metal conductor (51) includes a titanium substrate, and the outer periphery of the titanium substrate is provided with a corrosion-resistant conductive coating.

6. An electric heating device according to any one of claims 1-5, characterized in that, The water inlet pipe (2) is provided with a first water inlet section (21) extending horizontally, a second water inlet section (22) extending downward, and a third water inlet section (23) extending horizontally from near to far relative to the mounting base (1). The water outlet pipe (3) is provided with a first water outlet section (31) extending horizontally, a second water outlet section (32) extending downward, a third water outlet section (33) extending horizontally, and a fourth water outlet section (34) extending upward, in sequence from near to far relative to the mounting base (1). The electric heating tube (4) is provided with two parallel horizontally extending first heating sections (41), two parallel downward extending second heating sections (42), and two parallel horizontally extending third heating sections (43) connected at their ends, from near to far relative to the mounting base (1).

7. An electric heating device according to claim 6, characterized in that, Two of the third heating sections (43) are located on the lower sides of the third water inlet section (23), and the lower side of the third water inlet section (23) is provided with a plurality of water inlet holes (231).

8. An electric heating device according to claim 1, characterized in that, It also includes a temperature measuring tube (7), one end of which is closed on the first side of the mounting base (1), and the other end of which is open and connected to the mounting base (1).

9. A water heater, characterized in that, Includes an inner liner (9), which is a plastic inner liner or a slush-molded inner liner, and the inner liner (9) is provided with an installation port (91), and the installation port (91) is provided with an electric heating device as described in any one of claims 1-8.

10. A water heater according to claim 9, characterized in that, It also includes a mounting and fixing assembly (8), which includes a fixing seat (81) located on one side of the mounting base (1) and fixedly connected to the inner liner (9), a pressure cap (82) located on the other side of the mounting base (1), a fixing and locking member (83) connecting the fixing seat (81) and the pressure cap (82), and a sealing ring (84) located between the fixing seat (81) and the mounting base (1).

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