Die-casting type heating body and instant heating type electric appliance
By designing spiral-structured water pipe sections and stainless steel corrugated pipes, the problems of low heating efficiency and scale accumulation in existing die-cast heating elements have been solved, achieving efficient heating and low scale buildup.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-27
AI Technical Summary
The existing die-cast heating element has a small water pipe heat exchange area, resulting in low heating efficiency. Furthermore, tap water is prone to scale formation after long-term use, which reduces heat exchange efficiency.
Design a water pipe with a spiral structure, including heat exchange pipe sections with alternating expanding and contracting sections, combined with a stainless steel corrugated pipe to increase the heat exchange area and reduce scale accumulation.
It improves heating efficiency, reduces scale residue, and maintains high heat exchange efficiency and thermal energy utilization.
Smart Images
Figure CN224050635U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a die-casting type heating body and instant heating electric appliance. BACKGROUND
[0002] In the prior art, in some instant heating electric appliances, a die-casting type heating body is often used to heat water. The general die-casting type heating body comprises an electric heating tube, a water pipe in contact with the electric heating tube, a gap filled between the water pipe and the electric heating tube, and a die-casting shell wrapped outside the water pipe and the electric heating tube. Among them, the water pipe is spirally wrapped outside the electric heating tube along the extension direction of the electric heating tube, the cross section of the water pipe is a constant circular shape, the area of the outer peripheral wall of the water pipe for heat exchange is small, and the water keeps a turbulent flow state when flowing along the extension direction of the water pipe, the water located in the center line of the water pipe cannot contact the inner wall of the water pipe, resulting in low water heating efficiency.
[0003] In addition, the water pipe is generally connected to tap water, and after long-term use, scale is easy to form on the inner wall of the water pipe, thereby gradually reducing the heat exchange efficiency between the electric heating tube and the water pipe. SUMMARY
[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a die-casting type heating body with large heat exchange area to improve heating efficiency and reduce scale accumulation to maintain high heat exchange efficiency; the second purpose is to provide an instant heating electric appliance using the above-mentioned die-casting type heating body.
[0005] According to the die-casting type heating body of the first aspect of the utility model, the die-casting type heating body comprises an electric heating tube, a water pipe arranged outside the electric heating tube, and a die-casting shell wrapped outside the water pipe and the electric heating tube, the die-casting shell has a solid part filled in the gap between the water pipe and the electric heating tube, both ends of the water pipe are respectively an inflow pipe end and an outflow pipe end extending outside the die-casting shell, two electric terminals of the electric heating tube extend outside the die-casting shell, the water pipe comprises a heat exchange pipe section spirally extending around the outer periphery of the electric heating tube, the heat exchange pipe section is provided with a plurality of expansion pipe sections and a plurality of contraction pipe sections along the length direction thereof, and the plurality of expansion pipe sections and the plurality of contraction pipe sections are alternately arranged.
[0006] The die-casting type heating body according to the utility model embodiment has at least the following beneficial effects:
[0007] The water pipe of the above-mentioned die-casting type heating body has heat exchange pipe sections spirally extending around the outer periphery of the electric heating pipe, the heat exchange pipe sections are connected alternately by a plurality of expanded pipe sections and a plurality of contracted pipe sections, the flow speed of water is increased when the water flows from an expanded pipe section to an adjacent contracted pipe section, and the flow speed of water is decreased when the water flows from a contracted pipe section to an adjacent expanded pipe section, the surface area of the heat exchange pipe sections is increased to facilitate the improvement of heat exchange efficiency, the fast and slow water flow is beneficial to the formation of a surging effect to reduce the possibility of scale residue, and is also beneficial to the water flow in the center of the flow channel to the inner peripheral wall of the heat exchange pipe sections for heat exchange.
[0008] In some embodiments of the present application, the heat exchange pipe section is a corrugated pipe, the crest of the corrugated pipe constitutes the expanded pipe section, and the trough of the corrugated pipe constitutes the contracted pipe section.
[0009] In some embodiments of the present application, the diameter of the crest of the corrugated pipe is D1, the diameter of the trough of the corrugated pipe is D2, and 1.03d≤D1≤1.06d and 0.94d≤D2≤0.97d are satisfied.
[0010] In some embodiments of the present application, the distance between adjacent crests is 2mm to 5mm, 5mm≤d≤20mm, and the depth of the trough relative to the outer peripheral wall of the inflow pipe end is 0.15mm to 0.3mm.
[0011] In some embodiments of the present application, the corrugated pipe is made of stainless steel.
[0012] In some embodiments of the present application, the crest and the trough are connected by an arc section.
[0013] In some embodiments of the present application, the two ends of the electric heating pipe protrude from the same end of the die-casting shell to constitute two electric connection terminals staggered in the up-down direction, the part of the electric heating pipe between the two electric connection terminals is arranged in a spiral along the up-down direction, and the inflow pipe end or the outflow pipe end is arranged staggered with the electric connection terminals in the up-down direction.
[0014] In some embodiments of the present application, the die-casting shell is an aluminum die-casting shell or a copper die-casting shell.
[0015] In some embodiments of the present application, the surface of the die-casting shell is provided with two mounting side ears arranged opposite to each other, the mounting side ears are provided with mounting through holes, and the surface of the die-casting shell is further provided with a mounting column arranged staggered with the mounting side ears, and the middle part of the mounting column is provided with a threaded counterbore.
[0016] According to the second aspect of the utility model, the electric appliance of the instant heating type has higher heating efficiency and heat energy utilization rate, and can also reduce the possibility of scale residue to maintain higher heat exchange efficiency.
[0017] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model will be further explained in combination with the drawings and examples.
[0019] Figure 1 It is the structure schematic diagram of one embodiment of the die-casting type heating body of the utility model;
[0020] Figure 2 It is Figure 1 It is the schematic diagram of another visual angle of the embodiment;
[0021] Figure 3 It is Figure 1 It is the structure exploded schematic diagram of the embodiment;
[0022] Figure 4 It is Figure 3 It is the structure schematic diagram of the electric heating tube and water pipe combination in the embodiment.
[0023] Reference signs:
[0024] Electric heating tube 100;Electric terminal 110;Water pipe 200;Inflow pipe end 210;Outflow pipe end 220;Heat exchange pipe section 230;Wave crest part 231;Wave trough part 232;Die-casting shell 300;Mounting side ear 310;Mounting perforation 311;Mounting column 320;Screw thread counterbore 321. DETAILED DESCRIPTION
[0025] The embodiment of the utility model will be described in detail below, the examples of the embodiment are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar function throughout. The embodiment described below by referring to the drawings is exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.
[0026] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional 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.
[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] See Figure 1 , Figure 3 and Figure 4 This utility model discloses a die-cast heating element, comprising: an electric heating tube 100, a water pipe 200 disposed outside the electric heating tube 100, and a die-cast housing 300 enclosing the water pipe 200 and the electric heating tube 100. The die-cast housing 300 has a solid portion that fills the gap between the water pipe 200 and the electric heating tube 100. The two ends of the water pipe 200 are an inlet pipe end 210 and an outlet pipe end 220 extending out of the die-cast housing 300, respectively. The two electrical terminals 110 of the electric heating tube 100 extend out of the die-cast housing 300. The water pipe 200 includes a heat exchange tube section 230 that spirally extends around the outer periphery of the electric heating tube 100. The heat exchange tube section 230 has multiple expanding sections and multiple contracting sections arranged along its length direction, and the multiple expanding sections and multiple contracting sections are arranged alternately in sequence.
[0030] The water pipe 200 of the above-mentioned die-casting type heating body has heat exchange pipe sections 230 spirally extending around the outer periphery of the electric heating tube 100, the heat exchange pipe sections 230 are connected alternately by a plurality of expanded pipe sections and a plurality of contracted pipe sections, the flow rate of water is increased when the water flows from an expanded pipe section to an adjacent contracted pipe section, and the flow rate of water is decreased when the water flows from a contracted pipe section to an adjacent expanded pipe section, the surface area of the heat exchange pipe sections 230 is increased to facilitate the improvement of the heat exchange efficiency, the fluctuation effect is formed by the fast and slow water flow, which reduces the possibility of scale residue, and the water flow in the center of the flow channel flows to the inner peripheral wall of the heat exchange pipe sections 230 to perform heat exchange.
[0031] Referring to Figure 3 and Figure 4 In some embodiments of the present application, the heat exchange pipe section 230 is a corrugated pipe, the wave crest part 231 of the corrugated pipe constitutes the expanded pipe section, and the wave trough part 232 of the corrugated pipe constitutes the contracted pipe section. It can be understood that the plurality of wave crest parts 231 and the plurality of wave trough parts 232 of the corrugated pipe form the plurality of expanded pipe sections and the plurality of contracted pipe sections, respectively, the manufacturing method of the corrugated pipe is relatively simple, the uniformity of the wall thickness of the corrugated pipe is good, and the manufacturing difficulty is reduced.
[0032] In some embodiments of the present application, the diameters of the inflow pipe end 210 and the outflow pipe end 220 are d, the diameter of the wave crest part 231 of the corrugated pipe is D1, and the diameter of the wave trough part 232 of the corrugated pipe is D2, which satisfy 1.03d≤D1≤1.06d and 0.94d≤D2≤0.97d. It should be noted that when the above size relationship is satisfied, the water flow through the wave crest part 231 and the wave trough part 232 will not change too violently to cause serious turbulent flow phenomenon, and the effects of increasing the heat exchange area and limiting the formation of scale are achieved.
[0033] In some embodiments of the present application, the distance between adjacent wave crest parts 231 is 2mm to 5mm, 5mm≤d≤20mm, and the depth of the wave trough part 232 radially recessed from the outer peripheral wall of the inflow pipe end 210 is 0.15mm to 0.3mm. Through experiments, when the above conditions are satisfied, the die-casting type heating body has good heating efficiency and avoids the generation of large noise of water flow.
[0034] In some embodiments of the present application, the corrugated pipe is made of stainless steel material. It can be understood that the corrugated pipe made of stainless steel material has corrosion resistance, good toughness and structural strength, and is also beneficial to inhibit the formation of scale.
[0035] Referring to Figure 3 and Figure 4In some embodiments of the utility model, in order to avoid water in the flowing process causes heat exchange pipe section 230 to take place violent vibration, help water flow to flow smoothly, the wave crest part 231 with wave trough part 232 between all through the circular segment transition.
[0036] Refer to Figure 1 And Figure 4 In some embodiments of the utility model, the two ends of the electric heating tube 100 protrude from the same end of the die casting shell 300 to constitute two electric terminals 110 staggered up and down, the part of the electric heating tube 100 between the two electric terminals 110 is arranged along the up-down direction, and the inflow pipe end 210 or the outflow pipe end 220 is arranged staggered with the electric terminal 110 in the up-down direction. The above layout structure can avoid interference between the electric heating tube 100 and the water pipe 200, and make the combination of the electric heating tube 100 and the water pipe 200 more compact, which is beneficial to heat transfer.
[0037] In some embodiments of the utility model, the die casting shell 300 is an aluminum die casting body or a copper die casting body. It should be noted that the aluminum die casting body and the copper die casting body both have good heat conduction performance and processing convenience, and relatively, the cost of the aluminum die casting body is more low.
[0038] Refer to Figure 1 And Figure 2 In some embodiments of the utility model, the surface of the die casting shell 300 is provided with two mounting side ears 310 arranged opposite to each other, the mounting side ear 310 is provided with a mounting through hole 311, and the surface of the die casting shell 300 is also provided with a mounting column 320 arranged opposite to the mounting side ear 310, and the middle part of the mounting column 320 is provided with a threaded counterbore 321. It can be understood that the user can fix it on a certain support by using a fastening screw through the mounting through hole 311, or the user can tighten the threaded counterbore 321 of the mounting column 320 by using a fastening screw, so as to facilitate the mounting and fixing of the die casting heating body.
[0039] The utility model discloses a kind of instant heating electric appliances, including the die casting heating body of any one of the above technical solutions, the instant heating electric appliance has higher heating efficiency and heat energy utilization rate, also can reduce the possibility of scale residue to maintain higher heat exchange efficiency.
[0040] The technical features of the above embodiments can be combined arbitrarily, to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of these technical features does not exist contradiction, it should be considered that it is within the scope of the present application.
[0041] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A die-cast heat generator characterized by comprising: The application relates to a die-casting type heating body, which comprises an electric heating tube (100), a water pipe (200) arranged outside the electric heating tube (100), and a die-casting shell (300) wrapped outside the water pipe (200) and the electric heating tube (100), wherein the die-casting shell (300) has a solid part filled in the gap between the water pipe (200) and the electric heating tube (100), both ends of the water pipe (200) are respectively an inflow pipe end (210) and an outflow pipe end (220) which extend outside the die-casting shell (300), two electric terminals (110) of the electric heating tube (100) extend outside the die-casting shell (300), the water pipe (200) comprises heat exchange pipe sections (230) which are arranged around the outer periphery of the electric heating tube (100) and extend spirally, and a plurality of expansion pipe sections and a plurality of contraction pipe sections are arranged along the length direction of the heat exchange pipe sections (230), and the plurality of expansion pipe sections and the plurality of contraction pipe sections are arranged alternately.
2. The die-casting type heating body according to claim 1, wherein the heat exchange pipe sections (230) are bellows, the crest portions (231) of the bellows constitute the expansion pipe sections, and the trough portions (232) of the bellows constitute the contraction pipe sections.
3. The die-casting type heating body according to claim 2, wherein the diameters of the inflow pipe end (210) and the outflow pipe end (220) are both d, the diameter of the crest portion (231) of the bellows is D1, the diameter of the trough portion (232) of the bellows is D2, and 1.03d<=D1<=1.06d and 0.94d<=D2<=0.97d are satisfied.
4. The die-casting type heating body according to claim 3, wherein the distance between adjacent crest portions (231) is 2mm to 5mm, 5mm<=d<=20mm, and the depth of the radial recess of the trough portion (232) relative to the outer peripheral wall of the inflow pipe end (210) is 0.15mm to 0.3mm.
5. The die-casting type heating body according to claim 2, wherein the bellows are made of stainless steel.
6. The die-casting type heating body according to claim 2, wherein the crest portion (231) and the trough portion (232) are connected by a circular arc section.
7. The die-casting type heating body according to claim 1, wherein the two ends of the electric heating tube (100) extend out of the same end of the die-casting shell (300) to constitute two electric terminals (110) which are staggered in the up-down direction, the part of the electric heating tube (100) between the two electric terminals (110) is arranged in a coil shape in the up-down direction, and the inflow pipe end (210) or the outflow pipe end (220) is arranged to be staggered with the electric terminals (110) in the up-down direction.
8. The die-casting type heating body according to claim 1, wherein the die-casting shell (300) is an aluminum die-casting body or a copper die-casting body.
9. The die-casting type heating body according to claim 1, wherein The surface of the die-cast shell (300) is provided with two oppositely arranged mounting side ears (310), the mounting side ears (310) are provided with mounting through holes (311) penetratingly, and the surface of the die-cast shell (300) is also provided with mounting columns (320) arranged in a staggered manner with the mounting side ears (310), and the middle part of the mounting columns (320) is provided with threaded counterbores (321).
10. An electric appliance of the instant heating type, characterized in that, A die-cast type heating body comprising the die-cast type heating body according to any one of claims 1-9.