Electric heating device and electric water heater thereof

Abstract

The utility model discloses an electric heating device and an electric water heater thereof, the electric heating device comprises: a heating assembly comprising a flange plate and at least one heating tube, the flange plate is provided with at least one pair of through holes, the heating tube is provided with a pair of lead-out rods extending towards the flange plate, and the lead-out rods penetrate through the corresponding through holes; each leading-out rod is provided with a wiring assembly, each wiring assembly comprises an insulating base and a wiring terminal, the insulating bases are arranged on the flange plate, and the insulating bases are arranged outside the leading-out rods in a sleeving mode or arranged close to the leading-out rods; and the wiring terminal is arranged on the insulating base and is fixedly connected with the leading-out rod. The electric heating device provided by the utility model is simple in structure and convenient to disassemble and assemble, and not only can ensure that the extension length of the wiring terminal is shorter, but also can ensure the safety of electrical performance.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to an electric heating device and an electric water heater thereof. Background Art

[0002] Currently, storage-type electric water heaters on the market generally use heating tubes with flanged structures, which are often designed with protruding terminal blocks. Because the electrical installation space in the inlet area of storage-type electric water heaters is generally ample, the terminal blocks on the heating tubes often protrude a long distance.

[0003] In order to improve the adaptability of the storage electric water heater to the installation environment, it is necessary to shorten the length of the fuselage and significantly compress the electrical installation space in the nozzle area. This will cause interference between the wiring terminals of the electric heating tube and components such as the maintenance cover. Therefore, it is urgent to optimize the wiring terminal structure of the electric heating tube. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes an electric heating device with a simple structure and easy assembly and disassembly, which can ensure that the extension length of the terminal is short and the electrical performance is safe.

[0005] The utility model also provides an electric water heater.

[0006] According to the above-mentioned electric heating device, it is realized by the following technical solution:

[0007] An electric heating device comprises: a heating component, comprising a flange and at least one heating tube, the flange being provided with at least a pair of through holes, the heating tube being arranged outside the flange and provided with a pair of lead-out rods extending toward the flange, the lead-out rods being passed through the corresponding through holes; and a wiring assembly, the wiring assembly being provided on each of the lead-out rods, the wiring assembly comprising an insulating base and a wiring terminal, the insulating base being provided on the flange, and the insulating base being sleeved outside the lead-out rod or arranged close to the lead-out rod, the wiring terminal being provided on the insulating base and fixedly connected to the lead-out rod.

[0008] In some embodiments, the insulating base is provided with a mounting groove opening toward the wiring terminal, and the wiring terminal includes a horizontal section and a vertical section fixedly connected to form an "L" shape, the horizontal section is arranged in the mounting groove and cooperatively connected to the insulating base, and the vertical section is fixedly connected to the lead-out rod.

[0009] In some embodiments, a countersunk hole is provided on the bottom surface of the installation slot, and a fixing hole is provided at a position of the transverse section corresponding to the countersunk hole, and the fixing hole is communicated with the countersunk hole.

[0010] In some embodiments, a through hole or an air-avoidance hole for the lead-out rod to pass through is provided at a position of the insulating base corresponding to the through hole, and the lead-out rod is passed through the through hole or the air-avoidance hole and connected to the terminal.

[0011] In some embodiments, a sealing structure is provided between the insulating base and the lead-out rod; and / or a positioning structure is provided between the insulating base and the flange.

[0012] In some embodiments, the positioning structure includes a positioning protrusion and a positioning groove, the insulating base is provided with a positioning groove opening toward the flange, and the positioning protrusion extending toward the insulating base is provided at a position of the flange corresponding to the positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0013] In some embodiments, an annular flange extending toward the insulating base is provided on the periphery of the through hole, and the annular flange constitutes the positioning protrusion; the positioning groove is provided between the through hole and the through hole on the insulating base, and the positioning groove is coaxial with the through hole and is connected.

[0014] In some embodiments, two adjacent insulating bases are integrally formed, or an interlocking positioning structure is provided between two adjacent insulating bases.

[0015] In some embodiments, the interlocking positioning structure includes a flange and a notch, wherein the notch is recessed on one of the insulating bases, and the flange is convexly provided on the other insulating base, and the flange is inserted into the notch of the adjacent insulating base.

[0016] In some embodiments, a temperature probe tube and / or a fixed bracket are further included. The temperature probe tube is arranged near the heating tube and connected to the flange. The fixed bracket is arranged near the heating tube and connected to the flange.

[0017] According to the electric water heater provided above, it is implemented through the following technical solution: an electric water heater, which includes an electric heating device as described above.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The electric heating device of the utility model is configured such that the lead-out rod of the heating tube passes through the through hole of the flange, the wiring terminal is arranged on the flange through the insulating base, and the wiring terminal is fixedly connected to the lead-out rod of the heating tube. The structure is simple and the assembly and disassembly are convenient. The wiring terminal can be ensured to be short in length, and the wiring terminal can be reliably supported by the insulating base. The wiring terminal is also insulated and isolated from the flange, thereby ensuring the safety of electrical performance and avoiding the risk of electric shock caused by insulation failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the electric heating device in the embodiment of the utility model Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the electric heating device in the embodiment of the utility model Figure 2 ;

[0022] Figure 3 This is a partial cross-sectional view of the electric heating device in the embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the insulating base in the embodiment of the utility model. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the structure of the insulating base in the embodiment of the utility model. Figure 2 .

[0025] In the figure: 1-flange, 11-accommodating groove, 12-through hole, 13-positioning protrusion; 2-heating tube, 21-lead rod; 3-insulating base, 31-mounting groove, 311-counterbore, 32-through hole, 33-positioning groove, 34-flange, 35-notch; 4-connecting terminal, 41-horizontal section, 411-fixing hole, 42-vertical section; 5-sealing structure; 6-temperature detection tube; 7-fixing bracket. DETAILED DESCRIPTION

[0026] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0027] Example 1

[0028] refer to Figure 1-3This embodiment provides an electric heating device, including a heating assembly and a wiring assembly, wherein the heating assembly includes a flange 1 and a heating tube 2. The flange 1 is provided with a pair of through holes 12. In this embodiment, the flange 1 is provided with an upwardly opening receiving groove 11, and the pair of through holes 12 are provided on the bottom surface of the receiving groove 11 and are connected to the receiving groove 11. The heating tube 2 is provided at the bottom of the flange 1 and is provided with a pair of lead rods 21 extending toward the flange 1. The pair of lead rods 21 are respectively vertically provided from bottom to top through the pair of through holes 12 and extend into the receiving groove 11.

[0029] A wiring assembly is provided on each lead-out rod 21, comprising an insulating base 3 and a terminal block 4. In this embodiment, the insulating base 3 is made of an insulating material, preferably a ceramic material. The insulating base 3 is disposed within the receiving groove 11 of the flange 1 and is fitted over the lead-out rod 21. The terminal block 4 is disposed on top of the insulating base 3 and fixedly connected to the free end of the lead-out rod 21. In other embodiments, the insulating base 3 may be disposed outside the lead-out rod 21 and positioned close to the lead-out rod 21.

[0030] It can be seen that by introducing the insulating base 3, the terminal 4 is arranged on the flange 1 through the insulating base 3 and is fixedly connected to the lead-out rod of the heating tube 2. At this time, the insulating base 3 is located at the bottom of the terminal 4 and the two are in contact with each other. On the one hand, the insulating base 3 is used to support, reinforce and insulate the terminal 4, so that the flange 1 and the terminal 4 can be kept insulated from each other, thereby ensuring the insulation performance and electrical performance safety after wiring, avoiding the risk of electric shock caused by insulation failure, and secondly, it can ensure that the extension length of the lead-out rod of the heating tube 2 and the terminal 4 is short, effectively meeting the installation requirements of the smaller electrical installation space in the tank mouth area of the electric water heater, and at the same time avoiding interference between the terminal and its components.

[0031] refer to Figure 1-5 A mounting slot 31, open toward the terminal 4, is provided at one end of the insulating base 3 near the terminal 4. The terminal 4 comprises a transverse section 41 and a vertical section 42, fixedly connected to form an L-shape. The transverse section 41 is positioned within the mounting slot 31 and engages with the insulating base 3 to limit, position, and support the terminal 4, thereby enhancing the insulating base 3's support, reinforcement, and insulation isolation for the terminal 4. The vertical section 42 is securely connected to the adjacent lead bar 21 by welding.

[0032] Specifically, a countersunk hole 311 is provided at the bottom of the mounting slot 31, and a fixing hole 411 is provided at a position corresponding to the countersunk hole 311 in the transverse section 41. The lower end of the fixing hole 411 is inserted into and communicates with the countersunk hole 311. A gap is left between the bottom of the fixing hole 411 and the bottom of the countersunk hole 311. This gap is greater than the depth of the wiring screw inserted into the countersunk hole 311. When the wiring screw is engaged with the fixing hole 411, the interior space of the countersunk hole 311 can accommodate the wiring screw without contacting the bottom of the countersunk hole 311.

[0033] refer to Figure 3-5 In this embodiment, a through hole 32 for the lead rod 21 to pass through is provided at the position of the insulating base 3 corresponding to the through hole 12. The through hole 32 passes through the bottom and the top of the insulating base 2 respectively. The lead rod 21 is vertically penetrated in the through hole 32 from bottom to top. In this way, with the cooperation of the through hole 32 and the lead rod 21, a positioning and installation function can be achieved. The top of the lead rod 21 protrudes from the top of the insulating base so that the protruding part of the lead rod 21 is fixedly connected to the terminal 4 installed on the top of the insulating base 3. In other embodiments, an air-avoidance hole can be used instead of the through hole. The air-avoidance hole is formed by the outer wall of the insulating base 3 facing the lead rod 21, which is integrally recessed toward the inside of the insulating base. The lead rod 21 is vertically penetrated in the air-avoidance hole, and the top of the lead rod 21 extends upward to above the air-avoidance hole.

[0034] refer to Figure 3-5 A sealing structure 5 is provided between the insulating base 3 and the lead-out rod 21 to enhance the airtightness between the insulating base 3 and the lead-out rod 21. Specifically, the sealing structure 5 is sleeved on the outside of the lead-out rod 21 and includes a lower sealing section and an upper sealing section fixedly connected to each other in an inverted "T" shape. The upper sealing section is sandwiched between the outer wall of the lead-out rod 21 and the wall of the through hole 32 to form a first sealing layer, while the lower sealing section is sandwiched between the outer edge of the lower end surface of the through hole 32 and the heating tube 2 to form a second sealing layer. Of course, the lower sealing section can also be designed to seal between the outer edge of the upper end surface of the through hole 12 and the insulating base 3 to achieve a seal between the flange 1 and the insulating base 3.

[0035] refer to Figure 3-5A positioning structure is provided between the insulating base 3 and the bottom surface of the receiving groove 11 of the flange 1. The positioning structure includes a positioning protrusion 13 and a positioning groove 33. A positioning groove 33 is provided at the bottom of the insulating base 3, opening toward the flange 1. A positioning protrusion 13 extending toward the insulating base 3 is provided at a position on the flange 1 corresponding to the positioning groove 33. The positioning protrusion 13 is inserted into the positioning groove 33 to achieve the function of positioning the insulating base on the flange. In this embodiment, an annular flange extending toward the insulating base 3 is integrally formed on the periphery of the through hole 12. The annular flange constitutes the positioning protrusion 13; the positioning groove 33 is provided between the through hole 12 on the flange 1 and the through hole 32 on the insulating base 3, and the positioning groove 33 is coaxial with and connected to the through hole 12 and the through hole 32 respectively.

[0036] refer to Figure 1 In this embodiment, a pair of lead rods 21 on the heating tube 2 are spaced apart in the left-right direction, and two wiring assemblies connected to the pair of lead rods 21 are spaced apart, specifically, two insulating bases 3 connected to the pair of lead rods 21 are spaced apart. In other embodiments, the two insulating bases 3 can be designed to be integrally formed, or an interlocking positioning structure can be provided between the two insulating bases 3. Figure 4-5 The interlocking positioning structure includes a flange 34 and a notch 35. In this embodiment, a notch 35 and a flange 34 are provided at opposite ends of each insulating base 3. The flange 34 is configured to mate with the notch 35 of an adjacent insulating base 3. This increases the versatility of the insulating bases and helps reduce manufacturing costs. In other embodiments, only the notch 35 may be provided on one insulating base 3, while only the flange 34 may be provided on the other insulating base 3.

[0037] refer to Figure 1-3 Furthermore, the electric heating device also includes a temperature detection tube 6 and / or a fixed bracket 7. The temperature detection tube 6 is arranged near the heating tube 2 and is fixedly connected to the flange 1. The fixed bracket 7 is arranged near the heating tube 2 and is fixedly connected to the bottom of the flange 1. The fixed bracket 7 is configured to fix the magnesium rod.

[0038] This embodiment also provides an electric water heater, comprising a magnesium rod and an electric heating device as described above, wherein the magnesium rod is fixedly mounted on a flange 1 and adjacent to a heating tube 2 via a fixing bracket 7. Thus, an electric heating device having shorter, more reliable, and easily disassembled terminals is provided for the electric water heater, thereby improving electrical performance and safety.

[0039] Example 2

[0040] refer to Figure 1-3The difference between this embodiment and embodiment 1 is that there are two heating tubes 2, and correspondingly, two pairs of through holes 12 are provided on the flange 1, and the number of wiring assemblies is correspondingly four. The two heating tubes 2 are arranged on the flange 1 at intervals along the front-to-back direction. Both heating tubes 2 are provided with a pair of lead-out rods 21 extending toward the flange 1. The four lead-out rods 21 pass vertically from bottom to top through the four through holes 12 and extend into the receiving groove 11. At this time, the pair of lead-out rods 21 of the front heating tube 2 are arranged at intervals along the left-right direction, and the lead-out rod at one end of the rear heating tube 2 is also arranged at intervals along the left-right direction. A wiring assembly is provided on each of the four lead-out rods 21, and the wiring assembly includes an insulating base 3 and a wiring terminal 4. The wiring terminal 4 is provided on the flange 1 through the insulating base 3 and is fixedly connected to the lead-out rod 21 of the heating tube 2.

[0041] refer to Figure 1 In this embodiment, adjacent insulating bases 3 are spaced apart from each other, and interlocking positioning structures are provided between adjacent insulating bases 3 in the front-to-back direction. This interlocking positioning structure includes a flange 34 and a notch 35. Flanges 34 and notches 35 are provided at the front and back ends of the insulating bases 3, respectively. The flanges on the front insulating base 3 are inserted into the notches on the rear insulating base 3. In other embodiments, adjacent insulating bases 3 in the front-to-back direction can be designed as an integral part. Of course, adjacent insulating bases 3 on the left and right can also be designed to be detachably connected or integrally formed.

[0042] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An electric heating device, characterized in that: include: A heating component comprises a flange (1) and at least one heating tube (2), wherein the flange (1) is provided with at least one pair of through holes (12), the heating tube (2) is arranged outside the flange (1) and is provided with a pair of lead-out rods (21) extending toward the flange (1), and the lead-out rods (21) are passed through the corresponding through holes (12); and A wiring assembly is provided on each lead-out rod (21), and the wiring assembly includes an insulating base (3) and a wiring terminal (4). The insulating base (3) is provided on the flange (1), and the insulating base (3) is sleeved outside the lead-out rod (21) or arranged close to the lead-out rod (21). The wiring terminal (4) is provided on the insulating base (3) and fixedly connected to the lead-out rod (21).

2. An electric heating device according to claim 1, characterized in that: The insulating base (3) is provided with a mounting groove (31) opening toward the wiring terminal (4); the wiring terminal (4) comprises a transverse section (41) and a vertical section (42) fixedly connected to form an "L" shape; the transverse section (41) is arranged in the mounting groove (31) and is cooperatively connected to the insulating base (3); the vertical section (42) is fixedly connected to the lead rod (21).

3. An electric heating device according to claim 2, characterized in that: A countersunk hole (311) is provided on the bottom surface of the installation groove (31), and a fixing hole (411) is provided at a position of the transverse section (41) corresponding to the countersunk hole (311), and the fixing hole (411) is communicated with the countersunk hole (311).

4. The electric heating device according to claim 1, characterized in that: A through hole (32) or an air-avoidance hole for the lead-out rod (21) to pass through is provided at a position of the insulating base (3) corresponding to the through hole (12); the lead-out rod (21) is passed through the through hole (32) or the air-avoidance hole and is connected to the wiring terminal (4).

5. The electric heating device according to claim 1, characterized in that: A sealing structure (5) is provided between the insulating base (3) and the lead-out rod (21); and / or a positioning structure is provided between the insulating base (3) and the flange (1).

6. The electric heating device according to claim 5, characterized in that: The positioning structure comprises a positioning protrusion (13) and a positioning groove (33); the insulating base (3) is provided with a positioning groove (33) opening toward the flange (1); the positioning protrusion (13) extending toward the insulating base (3) is provided at a position of the flange (1) corresponding to the positioning groove (33); and the positioning protrusion (13) is inserted into the positioning groove (33).

7. An electric heating device according to claim 6, characterized in that: An annular flange extending toward the insulating base (3) is provided on the periphery of the through hole (12), and the annular flange constitutes the positioning protrusion (13); the positioning groove (33) is provided between the through hole (12) and the through hole (32) on the insulating base (3), and the positioning groove (33) and the through hole (32) are coaxial and connected.

8. An electric heating device according to any one of claims 1 to 7, characterized in that: The two adjacent insulating bases (3) are integrally formed, or an interlocking positioning structure is provided between the two adjacent insulating bases (3).

9. The electric heating device according to claim 8, characterized in that: The interlocking positioning structure comprises a flange (34) and a notch (35), wherein the notch (35) is recessed on one of the insulating bases (3), and the flange (34) is convexly provided on the other insulating base (3), and the flange (34) is inserted into the notch (35) of the adjacent insulating base (3).

10. An electric heating device according to any one of claims 1 to 7, characterized in that: It also includes a temperature detection tube (6) and / or a fixed bracket (7), wherein the temperature detection tube (6) is arranged near the heating tube (2) and connected to the flange (1), and the fixed bracket (7) is arranged near the heating tube (2) and connected to the flange (1).

11. An electric water heater, characterized in that: The invention comprises an electric heating device as described in any one of claims 1 to 10.

Images