Electric heater for heating railway vehicle carriage

Abstract

The utility model discloses an electric heater for heating a carriage of a rail traffic tool, and belongs to the technical field of heaters. The electric heater for heating the carriage of the rail traffic tool comprises a heating main body, the heating main body is formed by compositing an aluminum plate radiator, an iron-chromium-aluminum heating wire and heat conduction silica gel pads, the iron-chromium-aluminum heating wire is of a plane structure, and the heat conduction silica gel pads are arranged on the two faces of the iron-chromium-aluminum heating wire respectively. The aluminum plate radiators are arranged on the outer side faces of the heat conduction silica gel pads respectively, the aluminum plate radiators on the two sides are fixedly connected, and the iron-chromium-aluminum heating wires and the heat conduction silica gel pads are clamped between the aluminum plate radiators. The iron-chromium-aluminum heating wire is used as a heating base material, the aluminum plate radiators on the two sides are directly connected through the heat conduction silica gel pad, heat generated by the iron-chromium-aluminum heating wire can be directly conducted to the aluminum plate radiators, the heat dissipation area is increased through the aluminum plate radiators, the heating efficiency is high, the heat dissipation and temperature rise speed is high, and the product manufacturing cost is low; the device is especially suitable for heating of carriages of rail vehicles.

Description

Technical Field

[0001] The utility model relates to a heating device, and more particularly to an electric heater for heating a carriage of a rail transportation vehicle. Background Art

[0002] The environment in which rail vehicles such as railway trains operate is often complex, especially in the northern winter, which is affected by the ambient temperature. It is often difficult to heat the carriages using the heat pump principle. Therefore, most rail vehicles currently use direct heating to heat the carriages. It uses electric heaters to directly convert electrical energy into thermal energy to achieve the heating effect. It has the advantages of fast heating speed, simple maintenance and low cost.

[0003] At present, heating plates that use iron-chromium-aluminum as the heating substrate have appeared to replace traditional electric heaters. The iron-chromium-aluminum heating substrate of this heating plate is covered with a polyimide film with glue to etch the circuit, and both sides of the iron-chromium-aluminum heating substrate are insulated by polyimide film. Then, a silicone insulation layer and an aluminum profile plate are set on both sides for fixation. This heating plate has high heating efficiency, but the thermal conductivity of the polyimide film is poor, which is not conducive to heat conduction. In addition, the contact area between the aluminum profile plate and the air is small, and the heat dissipation speed is slow. It is necessary to additionally spray graphene to increase the heat radiation rate. However, the cost of graphene is relatively high. Since the heating plate is used in a large area in the car, the cost of using the product is greatly increased, resulting in a low competitive advantage of the product.

[0004] Therefore, it is necessary to design an electric heater with higher heat dissipation efficiency, lower cost and suitable for heating the carriages of rail transportation vehicles. Summary of the Invention

[0005] 1. Technical problems to be solved by the utility model

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide an electric heater for heating rail transit carriages. The technical solution of the present invention is adopted, an iron-chromium-aluminum heating wire is used as a heating substrate, and the aluminum plate radiators on both sides are directly connected through thermally conductive silicone pads. The heat generated by the iron-chromium-aluminum heating wire can be more directly conducted to the aluminum plate radiator, and the aluminum plate radiator is used to increase the heat dissipation area, so the heating efficiency is high, the heat dissipation and temperature rise speed is fast, and the product manufacturing cost is low. The present invention is particularly suitable for heating rail transit carriages.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0009] The utility model discloses an electric heater for heating a rail transit vehicle compartment, comprising a heating body, which is composed of an aluminum plate radiator, an iron-chromium-aluminum heating wire and a thermally conductive silicone pad. The iron-chromium-aluminum heating wire is a planar structure, and thermally conductive silicone pads are provided on both sides of the iron-chromium-aluminum heating wire. The outer sides of the thermally conductive silicone pads are respectively provided with aluminum plate radiators. The aluminum plate radiators on both sides are fixedly connected to clamp the iron-chromium-aluminum heating wire and the thermally conductive silicone pad in the middle.

[0010] Furthermore, a plurality of heat dissipation fins are provided on the aluminum plate radiator on at least one side of the heating body.

[0011] Furthermore, the inner side edge of the aluminum plate radiator on one side is provided with a side groove, and the inner side edge of the aluminum plate radiator on the other side is provided with a rib. When the aluminum plate radiators on both sides are fixedly connected, the rib is embedded in the corresponding side groove.

[0012] Furthermore, the side grooves and ribs are located on the long sides of the heating body.

[0013] Furthermore, the aluminum plate radiators on both sides are fixed by screws or rivets, and corresponding positions on the iron-chromium-aluminum heating wire and the thermal conductive silicone pad are provided with connection holes for avoiding screws or rivets.

[0014] Furthermore, the heating body is provided with a plurality of mounting holes.

[0015] Furthermore, the connection terminal of the iron-chromium-aluminum heating wire is connected to a plug through a power line.

[0016] Furthermore, an insulating pressing plate is provided at one end of the heating body, and the insulating pressing plate covers the terminal of the iron-chromium-aluminum heating wire.

[0017] Furthermore, the insulating pressing plate is fixed to the aluminum plate radiator on one side by screws.

[0018] 3. Beneficial effects

[0019] Compared with the existing known technologies, the technical solution provided by the present invention has the following beneficial effects:

[0020] (1) The utility model is an electric heater for heating a rail vehicle compartment, which includes a heating body, which is composed of an aluminum plate radiator, an iron-chromium-aluminum heating wire and a thermally conductive silicone pad. The iron-chromium-aluminum heating wire serves as a heating substrate and is directly connected to the aluminum plate radiators on both sides through the thermally conductive silicone pad. The heat generated by the iron-chromium-aluminum heating wire can be more directly conducted to the aluminum plate radiator, and the heat conduction is more efficient. The aluminum plate radiator is used to increase the heat dissipation area, and the heating efficiency is high, the heat dissipation temperature rises quickly, and the product manufacturing cost is low. It is particularly suitable for heating rail vehicle compartments;

[0021] (2) The utility model is an electric heater for heating a rail vehicle compartment, wherein a plurality of heat dissipation fins are provided on at least one side of the aluminum plate radiator of the heating body. The heat dissipation fins increase the contact area with the surrounding air, so that heat can be radiated into the air more quickly, further improving the heating temperature rise speed;

[0022] (3) The utility model is an electric heater for heating rail vehicle carriages, wherein the inner side edge of the aluminum plate radiator on one side is provided with a side groove, and the inner side edge of the aluminum plate radiator on the other side is provided with a rib. When the aluminum plate radiators on both sides are fixedly connected, the rib is embedded in the corresponding side groove. The rib on the inner side of the aluminum plate radiator can play a positioning role for the iron-chromium-aluminum heating wire and the thermal conductive silicone pad, which is convenient for the assembly and manufacture of the electric heater. Moreover, after the rib and the side groove are embedded, the sealing of the heating body can be increased, thereby improving the safety of use.

[0023] (4) The utility model is an electric heater for heating rail transportation vehicle compartments, wherein the aluminum plate radiators on both sides are fixed by screws or rivets, and corresponding positions on the iron-chromium-aluminum heating wire and the thermal conductive silicone pad are provided with connection holes for avoiding the screws or rivets. The aluminum plate radiators on both sides are conveniently and firmly connected, and the product has good integrity. In addition, a plurality of mounting holes are provided on the heating body to facilitate the installation and use of the electric heater;

[0024] (5) The utility model is an electric heater for heating rail transportation vehicle compartments, wherein the terminal end of the iron-chromium-aluminum heating wire is connected to a plug via a power cord, and can be plugged and played, and is convenient and quick to use;

[0025] (6) The utility model is an electric heater for heating rail transportation vehicle compartments, and an insulating pressure plate is provided at one end of the heating body. The insulating pressure plate covers the wiring terminal of the iron-chromium-aluminum heating wire, thereby further improving the safety of use while ensuring the stability of the wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of an electric heater for heating a rail vehicle compartment according to the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0028] Figure 3 for Figure 2 Schematic diagram of the locally enlarged structure at K in the middle.

[0029] Explanation of the numbers in the schematic diagram:

[0030] 1. Heating element; 1a. Mounting holes; 1-1. Aluminum plate radiator; 1-1a. Cooling fins; 1-1b. Side grooves; 1-1c. Ribs; 1-2. Insulating plate; 1-3. Iron-chromium-aluminum heating wire; 1-4. Thermally conductive silicone pad; 2. Power cord; 3. Plug. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0032] [Example]

[0033] Combine Figures 1 to 3 As shown, an electric heater for heating a rail vehicle compartment in this embodiment includes a heating body 1, which is composed of an aluminum plate radiator 1-1, an iron-chromium-aluminum heating wire 1-3, and a thermally conductive silicone pad 1-4. The iron-chromium-aluminum heating wire 1-3 is a heating substrate that generates heat when energized. The iron-chromium-aluminum heating wire 1-3 is a planar structure that forms a heating circuit. Thermally conductive silicone pads 1-4 are provided on both sides of the iron-chromium-aluminum heating wire 1-3. The thermally conductive silicone pads 1-4 can provide triple insulation, pressure resistance, and heat conduction. The outer sides of the thermally conductive silicone pads 1-4 are each provided with an aluminum plate radiator 1-1. The aluminum plate radiators 1-1 on both sides are fixedly connected, clamping the iron-chromium-aluminum heating wire 1-3 and the thermally conductive silicone pad 1-4 in the middle. The aluminum plate radiator 1-1 not only supports and secures the iron-chromium-aluminum heating wire 1-3 and the thermally conductive silicone pad 1-4, but also conducts and dissipates heat, achieving heat exchange with the surrounding air. Compared with existing heating plates, the polyimide layer between the iron-chromium-aluminum heating substrate and the thermally conductive silicone has been eliminated, making heat conduction more direct and efficient. There is no need to use polyimide film to etch circuits, and the manufacturing process is simpler. In addition, the 1-1 design of the aluminum plate radiator can increase the contact area with the air, increase the heating rate, and reduce the use of graphene, thereby reducing product manufacturing costs and improving market competitiveness.

[0034] Reference Figure 1 and Figure 2 As shown, in this embodiment, a plurality of heat dissipation fins 1-1a are provided on at least one side of the aluminum plate radiator 1-1 of the heating body 1. The heat dissipation fins 1-1a can be spaced perpendicular to the heating body 1, thereby increasing the contact area with the surrounding air, allowing heat to be radiated into the air more quickly, and further improving the heating temperature rise rate. Preferably, heat dissipation fins 1-1a are provided on both sides of the aluminum plate radiator 1-1.

[0035] In addition, if Figure 2 and Figure 3As shown, in this embodiment, the inner side edge of the aluminum plate radiator 1-1 on one side is provided with a side groove 1-1b, and the inner side edge of the aluminum plate radiator 1-1 on the other side is provided with a rib 1-1c. When the aluminum plate radiators 1-1 on both sides are fixedly connected, the rib 1-1c is embedded in the corresponding side groove 1-1b. The above-mentioned rib 1-1c on the inner side of the aluminum plate radiator 1-1 can play a positioning role for the iron-chromium-aluminum heating wire 1-3 and the thermal conductive silicone pad 1-4, which facilitates the assembly and manufacture of the electric heater. In addition, after the rib 1-1c and the side groove 1-1b are embedded, they can increase the sealing of the heating body, prevent leakage and other situations, and improve the safety of use. Preferably, the side groove 1-1b and the rib 1-1c are located on the long side of the heating body 1, which can better position the iron-chromium-aluminum heating wire 1-3 and the thermal conductive silicone pad 1-4.

[0036] In this embodiment, the aluminum plate radiators 1-1 on both sides are fixed by screws or rivets, and corresponding positions on the iron-chromium-aluminum heating wire 1-3 and the thermal conductive silicone pad 1-4 are also provided with connection holes for avoiding screws or rivets. The aluminum plate radiators 1-1 on both sides are locked and fixed together by screws or rivets, so as to achieve the clamping and fixing of the inner iron-chromium-aluminum heating wire 1-3 and the thermal conductive silicone pad 1-4, which is convenient and firm to connect and has good product integrity. Figure 1 As shown, in order to facilitate the installation of the electric heater, a plurality of mounting holes 1a are provided on the heating body 1 to facilitate the installation and use of the electric heater.

[0037] catch Figure 1 As shown, the terminal of the iron-chromium-aluminum heating wire 1-3 is also connected to a plug 3 through a power cord 2, which can be plug-and-play, and is convenient and quick to use. An insulating pressure plate 1-2 is also provided at one end of the heating body 1. The insulating pressure plate 1-2 covers the terminal of the iron-chromium-aluminum heating wire 1-3, which further improves the safety of use while ensuring the stability of the wiring. Specifically, the insulating pressure plate 1-2 is fixed to the aluminum plate radiator 1-1 on one side by screws. After the power is connected through the plug 3, the iron-chromium-aluminum heating wire 1-3 generates resistance heat, and the heat is transferred to the aluminum plate radiators 1-1 on both sides through the thermal conductive silicone pad 1-4. The aluminum plate radiator 1-1 exchanges heat with the surrounding air to raise the ambient temperature.

[0038] The utility model discloses an electric heater for heating rail transit vehicle carriages, which uses an iron-chromium-aluminum heating wire as a heating substrate and is directly connected to aluminum plate radiators on both sides through thermally conductive silicone pads. The heat generated by the iron-chromium-aluminum heating wire can be more directly conducted to the aluminum plate radiator, and the aluminum plate radiator is used to increase the heat dissipation area, with high heating efficiency, fast heat dissipation and temperature rise speed, and low product manufacturing cost. It is particularly suitable for heating rail transit vehicle carriages.

[0039] The above schematically describes the present invention and its embodiments, which is not intended to be limiting. The accompanying drawings illustrate only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the spirit of the present invention, uninventively designs structures and embodiments similar to this technical solution, they shall fall within the scope of protection of the present invention.

Claims

1. An electric heater for heating a rail vehicle compartment, comprising a heating body (1), characterized in that: The heating body (1) is composed of an aluminum plate radiator (1-1), an iron-chromium-aluminum heating wire (1-3) and a thermally conductive silicone pad (1-4); the iron-chromium-aluminum heating wire (1-3) is a planar structure; thermally conductive silicone pads (1-4) are provided on both sides of the iron-chromium-aluminum heating wire (1-3); and aluminum plate radiators (1-1) are provided on the outer sides of the thermally conductive silicone pads (1-4); the aluminum plate radiators (1-1) on both sides are fixedly connected to clamp the iron-chromium-aluminum heating wire (1-3) and the thermally conductive silicone pad (1-4) in the middle.

2. The electric heater for heating a rail vehicle compartment according to claim 1, characterized in that: A plurality of heat dissipation fins (1-1a) are provided on the aluminum plate radiator (1-1) on at least one side of the heating body (1).

3. The electric heater for heating a rail vehicle compartment according to claim 1, characterized in that: The inner side edge of the aluminum plate radiator (1-1) on one side is provided with a side groove (1-1b), and the inner side edge of the aluminum plate radiator (1-1) on the other side is provided with a convex rib (1-1c). When the aluminum plate radiators (1-1) on both sides are fixedly connected, the convex rib (1-1c) is embedded in the corresponding side groove (1-1b).

4. The electric heater for heating a rail vehicle compartment according to claim 3, characterized in that: The side grooves (1-1b) and the convex ribs (1-1c) are located on the long sides of the heating body (1).

5. The electric heater for heating a rail vehicle compartment according to claim 1, characterized in that: The aluminum plate radiators (1-1) on both sides are fixed by screws or rivets, and corresponding positions on the iron-chromium-aluminum heating wire (1-3) and the thermal conductive silicone pad (1-4) are also provided with connection holes for avoiding screws or rivets.

6. The electric heater for heating a rail vehicle compartment according to claim 1, characterized in that: The heating body (1) is also provided with a plurality of mounting holes (1a).

7. The electric heater for heating a rail vehicle compartment according to claim 1, characterized in that: The connection end of the iron-chromium-aluminum heating wire (1-3) is connected to a plug (3) via a power line (2).

8. The electric heater for heating a rail vehicle compartment according to claim 7, characterized in that: An insulating pressing plate (1-2) is further provided at one end of the heating body (1), and the insulating pressing plate (1-2) covers the connection terminal of the iron-chromium-aluminum heating wire (1-3).

9. The electric heater for heating a rail vehicle compartment according to claim 8, characterized in that: The insulating pressing plate (1-2) is fixed to the aluminum plate radiator (1-1) on one side by screws.

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