Electromagnetic water heater heating body

Abstract

The utility model relates to heating body sealing technical field especially relates to a kind of electromagnetic water heater heating body, including insulating outer sleeve, hollow structure's fixed ring is fixedly installed in insulating outer sleeve, insulating inner sleeve is fixedly installed in the fixed ring inner wall and is arranged in insulating outer sleeve, core rod is arranged in insulating inner sleeve, heating body end cover is arranged in the both ends of core rod and is pasted with the both ends of insulating outer sleeve, two heating body end covers are all set with sealing groove, T type but Qing sealing rubber ring and the O type sealing ring being arranged at the bottom end of T type but Qing sealing rubber ring are movably set in sealing groove. The utility model is stretched by counter-rotating two heating body end covers, and makes two heating body end cover and insulating outer sleeve both ends pasting, cooperate the rotation of gland, make T type but Qing sealing rubber ring and O type sealing ring seal the connecting place between different materials, prevent water leakage.

Description

Technical Field

[0001] This utility model relates to the field of heating element sealing technology, and in particular to a heating element for an electromagnetic water heater. Background Technology

[0002] An electromagnetic water heater is an instant electric water heater that uses the principle of electromagnetic induction to generate eddy currents in the metal pipe wall through a high-frequency alternating magnetic field, thereby indirectly heating the water flow.

[0003] Electromagnetic heating elements utilize the conductive material itself as a heat source. Since electromagnetic heaters are composed of different materials, leaks can easily occur at the joints due to differences in their coefficients of thermal expansion. Manufacturers typically use adhesives, resins, or ordinary sealing rings for sealing, but these materials have different coefficients of thermal expansion, and their varying degrees of thermal expansion and contraction during heating can easily lead to leaks over time. Utility Model Content

[0004] The purpose of this invention is to solve the problem of water leakage caused by different expansion coefficients in the existing technology after long-term use, and to propose an electromagnetic water heater heating element.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electromagnetic water heater heating element includes an insulating outer sleeve, a hollow fixing ring fixedly installed inside the insulating outer sleeve, an insulating inner sleeve fixedly installed inside the insulating outer sleeve, a core rod disposed inside the insulating inner sleeve, and heating element end caps disposed at both ends of the core rod and attached to the ends of the insulating outer sleeve. Each of the two heating element end caps has a sealing groove, and a T-shaped nitrile sealing ring and an O-ring sealing ring disposed at the bottom end of the T-shaped nitrile sealing ring are movably disposed in the sealing groove.

[0007] Preferably, both ends of the insulating outer sleeve are provided with a first thread, and both ends of the insulating outer sleeve are fitted with a pressure cap through the first thread, and the heating element end cap is disposed inside the pressure cap.

[0008] Preferably, a nut is fixedly installed inside each of the two heating element end caps, and the two nuts are arranged with opposite threads. A second thread is opened at both ends of the mandrel, and the nut is sleeved on the outer wall of the second thread through the internal thread.

[0009] Preferably, the heating element end cap is provided with a water inlet hole, and the heating element end cap is also provided with three flow holes disposed on the outer wall of the nut, the three flow holes being equally distributed around the circumference.

[0010] Preferably, both the core rod and the insulating inner sleeve are made of high magnetic permeability carbon steel and welded together, and gaps are left at the upper and lower ends of the core rod and the insulating inner sleeve.

[0011] Preferably, the two ends of the insulating outer sleeve are respectively disposed in two sealing grooves, and both the T-type nitrile sealing ring and the O-ring are disposed on the outer wall of the insulating outer sleeve.

[0012] Preferably, induction coils are fitted on the outer walls of both ends of the insulating outer sleeve, and magnetic strips are also provided on the outer walls of both ends of the insulating outer sleeve, with the magnetic strips positioned between the induction coils and the insulating outer sleeve.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This utility model uses the reverse rotation of the two heating element end caps to stretch the core rod and bring the two heating element end caps and the two ends of the insulating outer sleeve into contact. With the rotation of the pressure cap, the T-type nitrile sealing ring and the O-ring sealing ring seal the connection between different materials to prevent water leakage.

[0015] 2. This utility model uses hollow conductors for both the core rod and the insulating inner sleeve, allowing water to flow through the inside and outside of the hollow conductor, resulting in uniform heating of the water. This avoids the phenomenon of water leakage caused by deformation of the conductor due to uneven heating during heating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electromagnetic water heater heating element proposed in this utility model;

[0017] Figure 2 This is a front sectional view of the heating element of an electromagnetic water heater proposed in this utility model;

[0018] Figure 3 This is a partial cross-sectional schematic diagram of the heating element of an electromagnetic water heater proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the core rod and end cap of the heating element of an electromagnetic water heater proposed in this utility model.

[0020] In the diagram: 1. Insulating outer sleeve; 2. Insulating inner sleeve; 3. Core rod; 4. Pressure cap; 5. Heating element end cap; 6. Fixing ring; 7. Water inlet hole; 8. Flow hole; 9. Nut; 10. Sealing groove; 11. T-type nitrile sealing ring; 12. O-ring seal; 13. Magnetic strip; 14. Induction coil. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 An electromagnetic water heater heating element includes an insulating outer sleeve 1. A hollow fixing ring 6 is fixedly installed inside the insulating outer sleeve 1. An insulating inner sleeve 2 is fixedly installed inside the insulating outer sleeve 1. A core rod 3 is installed inside the insulating inner sleeve 2. Both ends of the core rod 3 are provided with heating element end caps 5 that are attached to both ends of the insulating outer sleeve 1. Each heating element end cap 5 has a sealing groove 10. A T-shaped nitrile sealing ring 11 and an O-ring sealing ring 12 located at the bottom end of the T-shaped nitrile sealing ring 11 are movably arranged in the sealing groove 10.

[0023] Both ends of the insulating outer sleeve 1 are provided with first threads, and both ends of the insulating outer sleeve 1 are fitted with pressure caps 4 through the first threads, and the heating element end cap 5 is disposed inside the pressure caps 4.

[0024] Nuts 9 are fixedly installed inside both heating element end caps 5, and the two nuts 9 are arranged with reverse threads. The mandrel 3 has a second thread at both ends. The nuts 9 are sleeved on the outer wall of the second thread through the internal thread. A water inlet hole 7 is opened on the heating element end cap 5. Three flow holes 8 are also opened on the heating element end cap 5 and arranged on the outer wall of the nuts 9. The three flow holes 8 are evenly distributed around the circumference.

[0025] Both the core rod 3 and the insulating inner sleeve 2 are made of high magnetic permeability carbon steel and are welded together, and there are gaps at the top and bottom ends of the core rod 3 and the insulating inner sleeve 2.

[0026] The insulating outer sleeve 1 is respectively set in two sealing grooves 10 at both ends, and the T-type nitrile sealing ring 11 and the O-ring sealing ring 12 are both set on the outer wall of the insulating outer sleeve 1. The outer walls at both ends of the insulating outer sleeve 1 are fitted with induction coils 14, and the outer walls at both ends of the insulating outer sleeve 1 are also provided with magnetic strips 13, which are set between the induction coils 14 and the insulating outer sleeve 1.

[0027] It should be noted that the specific model and specifications to be adopted need to be determined based on the actual specifications of the device. The specific selection and calculation methods use existing technology in this field, so they will not be elaborated here.

[0028] The functional principle of this utility model can be explained through the following operation methods:

[0029] When in use, first screw one end of the core rod 3 into the nut 9 inside the insulating outer sleeve 1 through the second thread. By placing the core rod 3 inside the insulating inner sleeve 2, make the other end of the core rod 3 flush with one end of the insulating outer sleeve 1, and screw the nut 9 into the other end of the core rod 3. By setting the internal threads of the two nuts 9 in opposite directions, the distance between the two heating element end caps 5 is reduced, so that both ends of the insulating outer sleeve 1 are placed in the sealing groove 10 and are tightly attached to the heating element end caps 5.

[0030] By rotating the pressure cap 4, the pressure cap 4 is moved toward the heating element end cap 5, and the T-type nitrile sealing ring 11 and O-ring sealing ring 12 are squeezed to seal the sealing groove 10, preventing water from flowing out from the connection between the insulating outer sleeve 1 and the heating element end cap 5.

[0031] When water flows from the inlet hole 7 into the insulating outer sleeve 1, the water will flow between the core rod 3 and the insulating inner sleeve 2. Through the principle of the conductor's skin effect, the core rod 3 and the insulating inner sleeve 2 are made of high magnetic permeability carbon steel and are welded together. The gaps left increase the effective surface area of ​​the core rod 3 and the insulating inner sleeve 2, preventing the core rod 3 and the insulating inner sleeve 2 from deforming due to uneven heating during heating, which would cause the whole heating element to leak water.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heating element for an electromagnetic water heater, comprising an insulating outer sleeve (1), characterized in that, A hollow fixing ring (6) is fixedly installed inside the insulating outer sleeve (1). An insulating inner sleeve (2) is fixedly installed inside the insulating outer sleeve (1) on the inner wall of the fixing ring (6). A core rod (3) is installed inside the insulating inner sleeve (2). Both ends of the core rod (3) are provided with heating element end caps (5) that are in contact with both ends of the insulating outer sleeve (1). A sealing groove (10) is opened in both heating element end caps (5). A T-type nitrile sealing ring (11) and an O-ring (12) at the bottom end of the T-type nitrile sealing ring (11) are movably arranged in the sealing groove (10).

2. The electromagnetic water heater heating element according to claim 1, characterized in that, Both ends of the insulating outer sleeve (1) are provided with first threads, and both ends of the insulating outer sleeve (1) are fitted with pressure caps (4) through the first threads. The heating element end cap (5) is located inside the pressure caps (4).

3. The electromagnetic water heater heating element according to claim 2, characterized in that, Nuts (9) are fixedly installed inside both heating element end caps (5), and the two nuts (9) are arranged with reverse threads. The mandrel (3) has a second thread at both ends, and the nuts (9) are sleeved on the outer wall of the second thread through the internal thread.

4. The electromagnetic water heater heating element according to claim 3, characterized in that, The heating element end cap (5) is provided with a water inlet hole (7), and the heating element end cap (5) is also provided with three flow holes (8) set on the outer wall of the nut (9), and the three flow holes (8) are evenly distributed around the circumference.

5. The electromagnetic water heater heating element according to claim 4, characterized in that, The core rod (3) and the insulating inner sleeve (2) are both made of high magnetic permeability carbon steel and welded together, and there are gaps at the top and bottom ends of the core rod (3) and the insulating inner sleeve (2).

6. The electromagnetic water heater heating element according to claim 5, characterized in that, The insulating outer sleeve (1) is respectively set in two sealing grooves (10) at both ends, and the T-type nitrile sealing ring (11) and the O-type sealing ring (12) are both set on the outer wall of the insulating outer sleeve (1).

7. The electromagnetic water heater heating element according to claim 6, characterized in that, The outer walls of both ends of the insulating outer sleeve (1) are fitted with induction coils (14), and magnetic strips (13) are also provided on the outer walls of both ends of the insulating outer sleeve (1). The magnetic strips (13) are located between the induction coils (14) and the insulating outer sleeve (1).

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