A multi-power high-efficiency heat conduction heating body assembly

Abstract

The utility model provides a kind of multi-power efficient heat conduction heating body assembly, it is related to electric water heater technical field, including mounting bracket, heater assembly is fixed on the mounting bracket, the heater assembly includes spiral sleeve and two semicylindrical electric heating tube, two the semicylindrical electric heating tube splicing into cylindrical electric heating tube bundle, the electric heating tube bundle slip inserts in spiral sleeve, the end of electric heating tube bundle and the end inner edge of spiral sleeve seal welding, the inner wall of spiral sleeve is inflated with spiral channel, spiral channel and the outer wall of cylindrical electric heating tube bundle form spiral heat exchange passage, the both ends of spiral sleeve are set in water inlet and water outlet respectively.In the utility model, liquid is directly contacted with electric heating tube bundle, heat exchange efficiency is improved, different power can be realized to work, energy waste is avoided, and low-frequency start-stop can be realized, impact current is avoided to shorten element life.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, specifically to a multi-power high-efficiency heat conduction heating element assembly. Background Technology

[0002] A heat conduction heating element assembly refers to a functional integrated component that efficiently, uniformly, and controllably transfers the heat generated by an electric heating element to the target application through a specially designed heat conduction system. A spiral tube heater is a common form of heat conduction heating element assembly, typically consisting of a heating element and a spiral water pipe. The spiral water pipe has perforated connections for the inlet and outlet. Pressure forces the liquid to circulate within the spiral water pipe, heating the electric heating element. Current heating element assemblies generally use die-cast aluminum with the heating element and water pipe pre-embedded. However, due to the heat transfer efficiency of the heating element, aluminum ingot, and spiral water pipe walls, some heat is lost. Furthermore, a single heating element is usually designed for a single power mode. That is, under rated voltage, its heating length and resistance value are fixed, allowing it to operate at a constant power. When the system only requires a portion of the heat, full-power operation leads to frequent start-stop cycles, wasting energy and shortening the component's lifespan due to inrush current. Summary of the Invention

[0003] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-power, high-efficiency heat conduction heating element assembly, which solves the problems mentioned in the background section.

[0004] Technical solution To achieve the above objectives, this utility model provides the following technical solution: A multi-power high-efficiency heat conduction heating element assembly includes a mounting bracket on which a heater assembly is fixed. The heater assembly includes a spiral sleeve and several electric heating tubes. The several electric heating tubes are spliced ​​into a cylindrical electric heating tube bundle. The electric heating tube bundle is slidably inserted into the spiral sleeve. The inner wall of the spiral sleeve has a spiral channel. The spiral channel and the outer wall of the cylindrical electric heating tube bundle form a spiral heat exchange channel. The two ends of the spiral sleeve are respectively set at an inlet and an outlet.

[0005] Preferably, the electric heating tube bundle includes two semi-cylindrical electric heating tubes, and the ends of the electric heating tube bundle are sealed and welded to the inner edge of the end of the spiral sleeve.

[0006] Preferably, the semi-cylindrical heating element includes a semi-circular tube body, a resistance wire, magnesium powder, sealing adhesive, and lead-out rods. The semi-circular tube body is inserted into a spiral sleeve, the magnesium powder is filled into the semi-circular tube body, the sealing adhesive is sealed and fixed to the inner walls of both ends of the semi-circular tube body, one end of the lead-out rod is inserted into the magnesium powder, and the other end extends to the outside of the semi-circular tube body. The resistance wire is embedded in the magnesium powder, and both ends are connected to the lead-out rods at both ends of the tube body.

[0007] Preferably, the semi-cylindrical heating tube includes an integrally formed arc-shaped portion that fits into the spiral sleeve and a flat portion for splicing. The flat portion has a sealing rib and a sealing groove extending along the axial direction. A sealing strip is fixed in the sealing groove. The sealing ribs and sealing grooves of the two semi-cylindrical heating tubes correspond to each other, and the sealing rib abuts against the sealing strip on the other semi-cylindrical heating tube.

[0008] Preferably, the planar portion is provided with an axially extending T-shaped groove and a T-shaped slide bar, the T-shaped slide bar being slidably inserted into the T-shaped groove.

[0009] Preferably, the T-shaped slider includes, from front to back, an insertion part, a wedge-shaped part, and a positioning part. The cross-section of the positioning part is in concave-convex fit with the cross-section of the T-shaped groove, and the wedge-shaped part is inclinedly connected between the insertion part and the positioning part.

[0010] Preferably, there are several T-shaped sliders, spaced apart along the length of the semi-cylindrical heating tube, and insertion slots are opened at intervals on the T-shaped grooves, with the insertion slots located in the gap between two adjacent T-shaped sliders.

[0011] Preferably, the cross-section of the spiral channel is set as a semi-circle with an opening at the lower end. Beneficial effects

[0012] This invention provides a multi-power, high-efficiency heat conduction heating element assembly. It has the following beneficial effects: In this invention, a spiral heat exchange channel is formed by the spiral channel and the outer wall of the cylindrical electric heating tube bundle, allowing the heat exchange liquid to directly contact the electric heating tube bundle, replacing the traditional indirect heat transfer method, avoiding heat loss and improving heat exchange efficiency.

[0013] In this invention, by splicing semi-cylindrical heating tubes into a cylindrical heating tube bundle, different power levels can be achieved by activating different numbers of heating tubes, thus avoiding energy waste. Furthermore, it allows for low-frequency start-stop, preventing inrush currents that could shorten the lifespan of the components.

[0014] In this invention, by sliding the T-shaped slider against the inner wall of the T-shaped groove, the sealing rib can be pressed tightly against the sealing strip, ensuring that the two flat parts fit together. This prevents liquid in the spiral channel from leaking into the joint gap between the two semi-cylindrical heating tubes, avoids the liquid from drying out and forming scale in the joint gap, and prevents scale from corroding the heating tubes, thus improving the service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a multi-power high-efficiency heat conduction heating element assembly according to the present invention; Figure 2 for Figure 1 Cross-section Figure 1 ; Figure 3 for Figure 1 Cross-section Figure 2 ; Figure 4 This is a schematic diagram of the semi-cylindrical electric heating tube in this utility model; Figure 5 This is a partial enlarged view of point A in this utility model; Figure 6 This is a schematic diagram of the T-shaped slider in this utility model.

[0016] In the diagram: 1. Mounting bracket; 2. Spiral sleeve; 3. Heating element; 31. Semi-circular tube body; 311. Arc-shaped part; 312. Flat part; 32. Resistance wire; 33. Lead-out rod; 4. Spiral channel; 5. Inlet; 6. Outlet; 7. Sealing rib; 8. Sealing strip; 9. T-slot; 10. Insertion slot; 11. T-slide bar; 12. Insertion part; 13. Wedge-shaped part; 14. Positioning part. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] This utility model embodiment provides a multi-power high-efficiency heat conduction heating element assembly, such as... Figure 1-6 As shown, the device includes a mounting bracket 1 on which a heater assembly is fixed. The heater assembly includes a spiral sleeve 2 and several heating elements 3. The heating elements 3 are spliced ​​together to form a cylindrical heating element bundle. Each heating element bundle includes two semi-cylindrical heating elements 3, which can be spliced ​​together to form a cylindrical heating element bundle. The bundle can be inserted into the spiral sleeve 2 with a concave-convex fit. By activating different numbers of heating elements 3, different power levels can be achieved, avoiding energy waste. Furthermore, it can be started and stopped at low frequencies to avoid inrush current and shorten the lifespan of the components.

[0019] The ends of the electric heating tube bundle 3 are sealed and welded to the inner edge of the end of the spiral sleeve 2. The inner wall of the spiral sleeve 2 is expanded with a spiral channel 4. The spiral channel 4 and the outer wall of the cylindrical electric heating tube bundle 3 form a spiral heat exchange channel. The cross-section of the spiral channel 4 is set as a semi-circle with an opening at the lower end. The two ends of the spiral sleeve 2 are respectively set at the inlet 5 and the outlet 6. Under pressure, the liquid enters from the inlet 5 and comes into direct contact with the electric heating tube bundle 3 along the spiral channel 4. Compared with the traditional method of spiral water pipes being wound around the electric heating tubes 3, the heat exchange efficiency is higher.

[0020] like Figure 2 As shown, the semi-cylindrical heating tube 3 includes a semi-circular tube body 31, a resistance wire 32, magnesium powder, sealing adhesive, and lead-out rods 33. The semi-circular tube body 31 is inserted into the spiral sleeve 2. The magnesium powder is filled inside the semi-circular tube body 31. The sealing adhesive is sealed and fixed on the inner walls of both ends of the semi-circular tube body 31. One end of the lead-out rod 33 is inserted into the magnesium powder, and the other end extends to the outside of the semi-circular tube body 31. The resistance wire 32 is embedded in the magnesium powder, and its two ends are respectively connected to the lead-out rods 33 at both ends of the tube body 31.

[0021] like Figure 3-6 As shown, the semi-circular tube 31 includes an integrally formed arc-shaped portion 311 that fits into the spiral sleeve 2 and a flat portion 312 for splicing. The flat portions 312 of two adjacent semi-cylindrical heating tubes 3 fit together, and the two arc-shaped portions 311 form a cylinder. The flat portion 312 is provided with a sealing rib 7 and a sealing groove extending along the axial direction. A sealing strip 8 is fixed in the sealing groove. The sealing ribs 7 and sealing grooves of the two semi-cylindrical heating tubes 3 correspond to each other, and the sealing rib 7 of one semi-cylindrical heating tube 3 abuts against the sealing strip 8 on the other semi-cylindrical heating tube 3.

[0022] The planar portion 312 is provided with axially extending T-shaped grooves 9 and T-shaped slide bars 11. Interlocking slots 10 are spaced apart on the T-shaped grooves 9. The width of the interlocking slots 10 is equal to the width of the T-shaped slide bars 11, and the length is greater than or equal to the length of the T-shaped slide bars 11, allowing the T-shaped slide bars 11 to be inserted into the T-shaped grooves 9 through the interlocking slots 10 for horizontal sliding and locking onto the T-shaped grooves 9. Several T-shaped slide bars 11 are provided, spaced apart on the planar portion 312, with the gap between two adjacent T-shaped slide bars 11 directly opposite the interlocking slots 10. Each T-shaped slide bar 11 includes an integrally formed connecting beam and a positioning beam. The connecting beam is fixed to the planar portion 312, and the positioning beam is vertically positioned at the top of the connecting beam. The lower sidewall of the positioning beam, from front to back, includes an interlocking portion 12, a wedge-shaped portion 13, and a positioning portion 14. The positioning portion 14... The cross-section of the T-groove 9 is concave and convex, and the wedge-shaped part 13 is inclinedly connected between the insertion part 12 and the positioning part 14. When the two semi-cylindrical heating tubes 3 are spliced ​​together, the T-shaped slide bar 11 is first aligned with the insertion groove 10 so that the T-shaped slide bar 11 can be inserted into the T-groove 9. At this time, the sealing rib 7 presses against the sealing strip 8 and the semi-cylindrical heating tubes 3 slide relative to each other. As the sliding wedge-shaped part 13 gradually abuts against the side wall of the T-groove 9, the sealing rib 7 gradually presses against the sealing strip 8 until the two semi-cylindrical heating tubes 3 are aligned with each other. At this time, multiple positioning parts 14 abut against the side wall of the T-groove 9 to form a stable compression, ensuring that the two semi-cylindrical heating tubes 3 can be spliced ​​into a stable cylindrical heating tube bundle 3, and ensuring the gap between the two semi-cylindrical heating tubes 3 is sealed, preventing liquid from seeping in and causing scale, preventing scale from corroding the outer wall of the heating tubes 3, and improving the service life.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-power high-efficiency heat conduction heating element assembly, comprising a mounting bracket, characterized in that: A heater assembly is fixed on the mounting bracket. The heater assembly includes a spiral sleeve and several electric heating tubes. The several electric heating tubes are spliced ​​into a cylindrical electric heating tube bundle. The electric heating tube bundle is slidably inserted into the spiral sleeve. The inner wall of the spiral sleeve has a spiral channel. The spiral channel and the outer wall of the cylindrical electric heating tube bundle form a spiral heat exchange channel. The two ends of the spiral sleeve are respectively set at the water inlet and the water outlet.

2. The multi-power high-efficiency heat conduction heating element assembly according to claim 1, characterized in that: The electric heating tube bundle includes two semi-cylindrical electric heating tubes, and the ends of the electric heating tube bundle are sealed and welded to the inner edge of the end of the spiral sleeve.

3. The multi-power high-efficiency heat conduction heating element assembly according to claim 2, characterized in that: The semi-cylindrical heating element includes a semi-circular tube body, a resistance wire, magnesium powder, sealing adhesive, and lead-out rods. The semi-circular tube body is inserted into a spiral sleeve. The magnesium powder is filled into the semi-circular tube body. The sealing adhesive is used to seal and fix the inner walls of both ends of the semi-circular tube body. One end of the lead-out rod is inserted into the magnesium powder, and the other end extends to the outside of the semi-circular tube body. The resistance wire is embedded in the magnesium powder, and both ends are connected to the lead-out rods at both ends of the tube body.

4. The multi-power high-efficiency heat conduction heating element assembly according to claim 3, characterized in that: The semi-cylindrical heating tube includes an integrally formed arc-shaped part that fits into the spiral sleeve and a flat part for splicing. The flat part is provided with a sealing rib and a sealing groove extending along the axial direction. A sealing strip is fixed in the sealing groove. The sealing ribs and sealing grooves of the two semi-cylindrical heating tubes correspond to each other, and the sealing rib abuts against the sealing strip on the other semi-cylindrical heating tube.

5. The multi-power high-efficiency heat conduction heating element assembly according to claim 4, characterized in that: The planar portion is provided with an axially extending T-shaped groove and a T-shaped slide bar, the T-shaped slide bar being slidably inserted into the T-shaped groove.

6. The multi-power high-efficiency heat conduction heating element assembly according to claim 5, characterized in that: The T-shaped slider includes, from front to back, a plug-in part, a wedge-shaped part, and a positioning part. The cross-section of the positioning part is in concave-convex fit with the cross-section of the T-shaped groove, and the wedge-shaped part is inclinedly connected between the plug-in part and the positioning part.

7. The multi-power high-efficiency heat conduction heating element assembly according to claim 6, characterized in that: The T-shaped sliders are arranged in a plurality of spaces, spaced apart along the length of the semi-cylindrical heating tube. Insertion slots are opened at intervals on the T-shaped grooves, and the insertion slots are located in the gaps between two adjacent T-shaped sliders.

8. The multi-power high-efficiency heat conduction heating element assembly according to claim 1, characterized in that: The cross-section of the spiral channel is set as a semi-circle with an opening at the lower end.

Images