Double-layer plate type electric heating body

Abstract

The utility model relates to the field of heating equipment, in particular to a double-layer plate type electric heating body. The double-layer plate type electric heating body comprises two layers of plate type electric heating bodies, each layer of plate type electric heating body comprises at least two heat exchange pipes, each heat exchange pipe is sleeved with a shell, and at least one semicircular groove formed in the axial direction of the corresponding heat exchange pipe is formed in the two transverse sides of each shell. The electric heating tubes are installed in the semicircular grooves of the two adjacent shells, and wiring terminals are fixed to the two ends of each electric heating tube; fixing holes are formed in the fins on the upper side and the lower side of the shell, and a bolt sequentially penetrates through the fixing holes of the fins to fasten the shell together; and the adjacent heat exchange tubes at one ends of the two layers of plate-type electric heating bodies are connected together. Due to the double-layer structure, the width of the whole heating body is reduced, the patch type temperature sensor can be screwed on a fin through a bolt or a self-tapping screw and the like, the temperature of the heating body at different positions can be monitored, and dry burning is prevented.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment, specifically a double-layer plate electric heating element. Background Technology

[0002] The existing heating element uses a PTC plate heating element, which is fixed between two heat exchange tubes. After processing, the PTC plate heating element and the shell become a whole.

[0003] PTC (semiconductor, chip) heating has some drawbacks, such as: high energy consumption, high power and voltage required for startup, large inrush current, magnetic properties causing noise during operation, reduced power over time, poor stability, easy leakage, and uneven power.

[0004] Furthermore, the PTC plate heating element and the housing are a single unit; if part fails or is damaged, the entire unit must be replaced, making repairs almost impossible and resulting in exceptionally high after-sales maintenance costs. Traditional plate heating elements, on the other hand, occupy a relatively large width, limiting their applicability. Utility Model Content

[0005] In order to solve some problems existing in the heaters of the prior art, this utility model provides a double-layer plate electric heating element.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a double-layer plate electric heating element, comprising two plate electric heating elements fixed together;

[0007] Each plate-type electric heating element includes at least two heat exchange tubes, each heat exchange tube is fitted with a shell, and each shell has at least one semi-circular groove arranged along the axial direction of the heat exchange tube on both lateral sides.

[0008] The electric heating element is installed in the semi-circular groove of two adjacent housings, so that the outer wall of the electric heating element fits against the inner wall of the semi-circular groove. The two ends of the electric heating element are fixed with wiring terminals.

[0009] Fixing holes are provided on the fins on the upper and lower sides of the shell. Bolts are passed through the fixing holes of each fin in sequence to fasten the shell together.

[0010] One of the plate-type electric heating elements has a first pipe joint at the end of the heat exchange tube on the innermost or outermost side of the horizontal direction.

[0011] Another layer of plate electric heating element has a second pipe joint at the end of the heat exchange tube away from the first pipe joint.

[0012] The first pipe joint and the second pipe joint are located at the same end along the axial direction of the heat exchange tube.

[0013] Two plate-type electric heating elements have adjacent heat exchange tubes connected together at one end.

[0014] Furthermore, the heat exchange tubes are connected by an arc-shaped pipe.

[0015] Furthermore, the number of semi-circular grooves is three.

[0016] Furthermore, the electric heating element is an alumina ceramic heating element.

[0017] Furthermore, the housing is made of aluminum alloy.

[0018] Furthermore, the heat exchange tube, the first pipe joint, and the second pipe joint are made of copper.

[0019] Furthermore, the housing is provided with heat exchange channels arranged along the axial direction, and the heat exchange tubes are fitted to the inner wall of the heat exchange channels through a tube expansion process.

[0020] Furthermore, a silicone sleeve is fitted onto the terminal block;

[0021] The silicone sleeve is fixed to the terminal block by a clip.

[0022] Furthermore, multiple temperature sensors are mounted on the fins.

[0023] Furthermore, the two plate-type electric heating elements are fixed together with bolts.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This application uses an electric heating element and improves the heat transfer structure, which not only solves the problems of high energy consumption, high noise, and power attenuation of PTC heating, but also reduces costs; the electric heating element can be replaced if it is damaged, instead of being scrapped as a whole, which is more environmentally friendly; there is no inrush current, the operation is stable, the insulation is high, and the water and electricity are completely separated.

[0026] Anti-dry burning, copper water system, fast heat transfer, and less prone to scaling;

[0027] The double-layer structure reduces the width of the entire heating element. The surface-mount temperature sensor can be screwed onto the fins using bolts or self-tapping screws to monitor the temperature of the heating element at different locations and prevent dry burning. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of the double-layer plate electric heating element provided for an embodiment of this utility model;

[0029] Figure 2 A cross-sectional view of a double-layer plate electric heating element provided for an embodiment of this utility model;

[0030] Figure 3 A side view (without heat exchange tubes) of a double-layer plate electric heating element provided for an embodiment of this utility model;

[0031] Figure 4 A schematic diagram showing the connection between the electric heating element and the wiring terminals;

[0032] The components include: heat exchange tube 1, shell 2, semi-circular groove 3, electric heating tube 4, wiring terminal 5, fixing hole 6, heat exchange channel 7, first pipe joint 8, second pipe joint 9, silicone sleeve 10, fins 11, connector 12, temperature sensor 13, and clip 14. Detailed Implementation

[0033] 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 some embodiments of the present utility model, and not all embodiments. 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.

[0034] like Figures 1-4 As shown, this embodiment provides a double-layer plate electric heating element, which consists of two plate electric heating elements that are fixed together by bolts.

[0035] Each plate-type electric heating element is made of large components such as shell 2, electric heating tube 4, and heat exchange tube 1. It includes multiple heat exchange tubes 1 of the same specification. Heat exchanger, such as water, is added to heat exchange tube 1. Under special conditions, heat exchanger with better performance can be selected according to the needs.

[0036] Each plate-type electric heating element includes at least two heat exchange tubes 1. In this embodiment, there are three heat exchange tubes 1 per layer. Each heat exchange tube 1 is fitted with a shell 2. The shell 2 is made of aluminum alloy. A heat exchange channel 7 is machined in the middle of the shell 2. The heat exchange tube 1 is inserted into the heat exchange channel 7. Both ends of the heat exchange tube 1 protrude from the heat exchange channel 7 and are kept at the same length. The heat exchange tube 1 is tightly attached to the inner wall of the heat exchange channel 7 by a tube expander to better absorb heat and will not fall off from the shell 2.

[0037] Each shell 2 has at least one semi-circular groove 3 arranged along the axial direction of the heat exchange tube 1 on both sides of the transverse direction;

[0038] The electric heating element 4 is installed in the semi-circular grooves 3 of two adjacent housings 2. After the two semi-circular grooves 3 are joined together, they fit against the outer wall of the electric heating element 4. The two ends of the electric heating element 4 are fixed with terminals 5. The terminals 5 can be electrode plates, and the electrode plates at both ends are connected to the neutral wire and the live wire respectively.

[0039] Fixing holes 6 are provided on the fins 11 on the upper and lower sides of the housing 2. The connector 12 is passed through the fixing holes 6 of each fin 11 in sequence to fasten the housing 2 together. Multiple housings 2 are fixed together. When the plate electric heating element fails, the faulty part can be replaced by removing the bolts, which can extend the service life and reduce the cost of use.

[0040] One of the heat exchange tubes 1, located on the innermost or outermost side of the horizontal layer of the plate electric heating element, is equipped with a first pipe joint 8, i.e. Figure 1 The leftmost heat exchange tube 1 of the upper middle plate electric heating element;

[0041] The heat exchange tube end of the other layer of plate electric heating element, away from the first tube joint, is provided with a second tube joint, i.e. Figure 1 The heat exchange tubes 1 on the far left and right sides of the middle and lower plate electric heating element;

[0042] The first pipe joint 8 and the second pipe joint 9 are located at the same end along the axial direction of the heat exchange tube 1, that is... Figure 1 The lower end of the middle;

[0043] Two adjacent heat exchange tubes 1 of the two-layer plate electric heating elements are connected together at one end, such as... Figure 1 As shown, the upper end of the heat exchange tube 1 in the upper plate electric heating body is connected to the upper end of the heat exchange tube 1 directly below the lower plate electric heating body through an arc-shaped pipe; while the lower end heat exchange tube 1 of the double-layer plate heating body is connected to the heat exchange tube 1 at the lower left. Because the lower end pipe joint is equipped with a first pipe joint 8 and a second pipe joint 9, it is not possible to use a corresponding connection method between the upper and lower ends.

[0044] In another embodiment of this application, there are 3 semi-circular grooves, and the electric heating tubes 4 are also in groups of 3, with both ends fixed to the wiring terminals 5 and arranged in parallel. The diameter of the electric heating tubes is 7.8-7.9mm, and different lengths can be selected according to different market demands.

[0045] In another embodiment of this application, the electric heating element 4 is an alumina ceramic heating element, which has the advantages of rapid and uniform heating, large heating surface, low power consumption, long service life, and good heat preservation performance.

[0046] In another embodiment of this application, the heat exchange tube 1, the first pipe joint 8, and the second pipe joint 9 are made of copper. Copper has fast heat transfer, is not prone to scaling, is corrosion resistant, and has a long service life.

[0047] In another embodiment of this application, a silicone sleeve 10 is provided on the terminal block 5. The silicone sleeve 10 is clamped and fixed on the terminal block 5 by a clip 14, which can protect the terminal block 5 and the connection.

[0048] In another embodiment of this application, multiple temperature sensors 13 are installed on the fin 11. The temperature sensors are surface-mount type and can be screwed onto the fin 11 by means of bolts or self-tapping screws. They can monitor the temperature of the heating element at different locations and prevent dry burning.

[0049] The assembly process for the double-layer plate electric heating element is as follows:

[0050] Place the pre-positioned electric heating tube 4 with the soldered terminal 5 into the semi-circular groove 3, press the electric heating tube 4 tightly, and lock the electric heating tube 4 with the connector 12 according to the positioning, so that the shell 2 is completely attached to the surface of the electric heating tube 4; when the electric heating tube 4 heats, the shell 2 can transfer the heat to the liquid in the heat exchange tube 1 very well.

[0051] Connect the two ends of heat exchange tube 1 through arc-shaped pipes, connect the power cord and water pipe, and a complete plate electric heating element is assembled. The process is simple.

[0052] 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 double-plate type electric heating element, characterized by: The two-layer plate type electric heating body is fixed together; Each layer of the plate type electric heating body comprises at least two heat exchange pipes (1), each of which is provided with a shell (2), and each of the shells (2) is provided with at least one semicircular groove (3) arranged along the axis of the heat exchange pipe (1) on the lateral sides thereof; An electric heating pipe (4) is arranged in the semicircular groove (3) of the adjacent two shells (2) so that the outer wall of the electric heating pipe (4) is attached to the inner wall of the semicircular groove (3), and the electric heating pipe (4) is fixed with a terminal (5) at both ends thereof; The shell (2) is fastened together by a connecting piece (12) which is sequentially inserted through the fixing holes (6) of the fins (11) on the upper and lower sides of the shell (2); The end of the heat exchange pipe (1) on the innermost or outermost side of one layer of the plate type electric heating body is provided with a first pipe joint (8); The end of the heat exchange pipe (1) on the side away from the first pipe joint of the other layer of the plate type electric heating body is provided with a second pipe joint (9); The first pipe joint (8) and the second pipe joint (9) are located at the same end of the heat exchange pipe (1) in the axial direction. The adjacent heat exchange pipes (1) at one end of the two-layer plate type electric heating body are connected together.

2. The double-layer plate-type electric heating element according to claim 1, characterized by: The heat exchange pipes (1) are connected by arc-shaped pipelines.

3. The double-layer plate-type electric heating element according to claim 1, characterized by: The number of the semicircular grooves (3) is three.

4. The double-layer plate-type electric heating element according to claim 1, characterized by: The electric heating pipe (4) is an alumina ceramic heating pipe.

5. The double-layer plate-type electric heating element according to claim 1, characterized by: The shell (2) is made of aluminum alloy.

6. The double layer plate type electric heater according to claim 1, characterized by: The heat exchange pipe (1), the first pipe joint (8) and the second pipe joint (9) are made of copper.

7. The double-layer plate type electric heating element according to claim 1, characterized by: The shell (2) is provided with a heat exchange channel (7) arranged in the axial direction, and the heat exchange pipe (1) is attached to the inner wall of the heat exchange channel (7) by an expansion pipe process.

8. The double layer plate type electric heater according to claim 1, characterized by: A silica gel sleeve (10) is sleeved on the terminal (5). The silica gel sleeve (10) is fixed on the terminal (5) by a clip (14).

9. The double layer plate type electric heater according to claim 1, characterized by: A plurality of temperature sensors (13) are mounted on the fin (11).

10. The double layer plate type electric heater according to claim 1, characterized by: The two-layer plate type electric heating body is fastened together by bolts.

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