Energy-saving explosion-proof electric heater

Abstract

This utility model discloses an energy-saving and explosion-proof electric heater, relating to the field of electric heaters. It includes a housing with an air inlet at one end and an air outlet at the other end. A first partition is located inside the housing near the air inlet, and a second partition is located inside the housing near the air outlet. The first and second partitions are staggered. This utility model uses the first and second partitions to separate the inner cavity of the housing into a flow channel chamber and a heating chamber. The flow channel chamber preheats the incoming airflow, preventing the low-temperature airflow from directly contacting the heating element and consuming its heat, thus reducing the overall energy consumption of the heater. Increasing the airflow travel ensures uniform heating. Furthermore, the junction box and housing are designed to be detachable, facilitating regular surface cleaning of the heating element and preventing dust or rust from affecting heat transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electric heaters, specifically an energy-saving and explosion-proof electric heater. Background Technology

[0002] Electric heaters operate based on the Joule heating effect generated when an electric current passes through a resistive material. When an electric current passes through a heating element (such as a heating wire, PTC ceramic, etc.), electrical energy is converted into heat energy and released due to the resistance, thereby heating the surrounding medium (such as air, water, oil, etc.).

[0003] The gas explosion-proof electric heater is a specially designed electric heating device for safe operation in the presence of explosive gases. A low-temperature gas medium, under pressure, enters the heater inlet through a pipeline and, along a specific internal heat exchange channel, carries away the high-temperature heat generated by the heating element, raising the temperature of the heated gas. The outlet delivers the high-temperature gas required by the process. The heater's internal control system automatically adjusts the output power based on the temperature sensor signal at the outlet to ensure uniform medium temperature. When the heating element overheats, an independent overheat protection device immediately cuts off the power supply to prevent material deterioration, coking, carbonization, or even element burnout.

[0004] However, existing gas explosion-proof electric heaters have a short stroke, and the low-temperature airflow comes into direct contact with the heating tube, resulting in a large temperature difference between the two. Rapid heating increases energy consumption. In addition, dust and water vapor can easily enter the electric heater along with the airflow. Dust will adhere to the outer wall of the heating tube, and water vapor will cause the outer wall of the electric heating tube to rust, thereby reducing the heat conduction efficiency of the heating tube. Utility Model Content

[0005] The purpose of this utility model is to provide an energy-saving and explosion-proof electric heater in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving explosion-proof electric heater, comprising a shell, an air inlet at one end of the shell and an air outlet at the other end of the shell, a first partition at the end of the shell near the air inlet, and a second partition at the end of the shell near the air outlet, the first partition and the second partition being staggered, and the first partition and the second partition dividing the inner cavity of the shell into a flow channel chamber and a heating chamber, the flow channel chamber being located on one side of the heating chamber;

[0007] The top of the outer casing is open, and a detachable junction box is installed at the upper open end of the outer casing. Multiple equally spaced heating tubes are arranged at the lower end of the junction box, and the heating tubes are located in the heating chamber.

[0008] As a further embodiment of this utility model: the flow channel chamber has an "L" shaped cross-section and is fixed to the inner wall of the outer shell by welding; the second partition is located above one end of the flow channel chamber and is fixed to the inner wall of the outer shell by welding.

[0009] As a further improvement of this utility model: the flow channel chamber is connected to the heating chamber, and the flow channel chamber has a "U" shaped structure.

[0010] As a further improvement of this utility model: a sealing gasket is provided between the junction box and the opening end of the outer shell, and the sealing gasket is made of high temperature resistant rubber.

[0011] As a further improvement of this utility model, two handles are symmetrically arranged at both ends of the top of the junction box.

[0012] As a further improvement of this utility model, flanges are provided on the outer ends of both the air inlet and the air outlet.

[0013] As a further improvement of this utility model: an installation groove is provided on the periphery of the flange opening end of the air inlet, and a filter assembly is provided in the installation groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a first and a second partition to separate the inner cavity of the outer shell into a flow channel chamber and a heating chamber. The flow channel chamber preheats the incoming airflow, preventing the low-temperature airflow from directly contacting the heating tube and consuming the heat on the heating tube, thereby reducing the overall energy consumption of the heater. By increasing the airflow path, the heat distribution of the airflow can be ensured to be uniform. In addition, by designing the junction box and outer shell to be detachable, it is convenient to clean the surface of the heating tube regularly, avoiding dust or rust from affecting the heat transfer efficiency, thus indirectly achieving energy-saving effects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the disassembled structure of the filter assembly and heater of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the present invention.

[0019] Figure 4 This is a magnified structural diagram of region A of this utility model.

[0020] In the diagram: 1. Outer shell; 11. Air inlet; 12. Air outlet; 2. First partition; 3. Second partition; 4. Flow channel chamber; 5. Heating chamber; 6. Junction box; 61. Heating tube; 62. Handle; 7. Filter assembly; 71. Mounting groove; 8. Sealing gasket. 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. 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.

[0022] Please see Figures 1-4 In this embodiment of the present invention, an energy-saving explosion-proof electric heater includes a shell 1, an air inlet 11 at one end of the shell 1 and an air outlet 12 at the other end of the shell 1, a first partition 2 at the end of the shell 1 near the air inlet 11 and a second partition 3 at the end of the shell 1 near the air outlet 12, the first partition 2 and the second partition 3 are staggered, and the first partition 2 and the second partition 3 divide the inner cavity of the shell 1 into a flow channel chamber 4 and a heating chamber 5, the flow channel chamber 4 being located on one side of the heating chamber 5;

[0023] The top of the outer casing 1 is open, and a detachable junction box 6 is installed at the upper open end of the outer casing 1. Multiple heating tubes 61 are evenly distributed at the lower end of the junction box 6, and the heating tubes 61 are located inside the heating chamber 5.

[0024] The flow channel chamber 4 has an "L" shaped cross-section and is fixed to the inner wall of the outer shell 1 by welding. The second partition 3 is located above one end of the flow channel chamber 4 and is fixed to the inner wall of the outer shell 1 by welding. The flow channel chamber 4 is connected to the heating chamber 5 and has a "U" shaped structure.

[0025] A sealing gasket 8, made of high-temperature resistant rubber, is provided between the junction box 6 and the open end of the outer casing 1; two handles 62 are symmetrically arranged at both ends of the top of the junction box 6; flanges are provided on the outer ends of both the air inlet 11 and the air outlet 12.

[0026] In this embodiment: the inner cavity of the outer shell 1 is divided into a flow channel chamber 4 and a heating chamber 5 by the first partition 2 and the second partition 3. The flow channel chamber 4 is used to preheat the incoming airflow, avoiding direct contact between the low-temperature airflow and the heating tube 61 and the heat on the heating tube 61, thereby reducing the overall energy consumption of the heater. By increasing the airflow path, the uniform heating of the airflow can be ensured. In addition, by designing the junction box 6 and the outer shell 1 to be detachable, it is convenient to clean the surface of the heating tube 61 regularly, avoiding dust or rust from affecting the heat transfer efficiency, and indirectly achieving energy saving.

[0027] Specifically, the outer ends of the air inlet 11 and the air outlet 12 in this design are both flange structures, which can be connected to the pipeline by bolts, making installation and disassembly very convenient. The airflow enters the flow channel chamber 4 inside the outer shell 1 through the air inlet 11. Since the flow channel chamber 4 is heated by the heating chamber 5, the flow channel chamber 4 can preheat the airflow, reducing the temperature difference between the airflow and the temperature inside the heating chamber 5. The flow channel chamber 4 has a "U" shaped structure, which can ensure that the airflow has sufficient travel for preheating. Then the airflow enters the heating chamber 5 through the flow channel chamber 4 for heating. Multiple heating tubes 61 in the heating chamber 5 are arranged at equal intervals, which can ensure that the airflow is heated evenly during the flow heating. The gas that is still being heated flows out from the air outlet 12.

[0028] In this design, the junction box 6 and the outer casing 1 are detachably connected. The junction box 6 and the outer casing 1 are fixed together by bolts, and a sealing gasket 8 is also provided between them. This can improve the sealing of the connection between the outer casing 1 and the junction box 6 and reduce heat loss. After the junction box 6 is removed from the upper opening end of the outer casing 1, the heating tube 61 at the lower end of the junction box 6 can be cleaned regularly. By wiping the dust or rust stains adhering to the heating tube 61, it is beneficial for the heating tube 61 to maintain a high heat transfer, thereby effectively reducing energy consumption.

[0029] Please refer to this carefully. Figures 1-4 An installation groove 71 is provided around the flange opening end of the air inlet 11, and a filter assembly 7 is provided in the installation groove 71.

[0030] In this embodiment, the filter assembly 7 mainly consists of an outer ring and a filter screen. The filter screen is connected to the inner side of the outer ring. The outer diameter of the outer ring matches the inner diameter of the mounting groove 71, and the thickness of the outer ring matches the depth of the mounting groove 71. Thus, after the pipe is connected to the air inlet 11, the filter assembly 7 can be clamped and limited to perform the filtering function. The replacement of the filter assembly 7 is also very convenient. The filter assembly 7 can be removed from the mounting groove 71 and replaced by disassembling the connection between the air inlet 11 and the air inlet pipe, thus avoiding the filter assembly 7 from being blocked and affecting the air intake rate.

[0031] 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. An energy-saving explosion-proof electric heater, comprising a housing (1), wherein one end of the housing (1) is provided with an air inlet (11) and the other end of the housing (1) is provided with an air outlet (12), characterized in that, A first partition (2) is provided inside the outer shell (1) at one end near the air inlet (11), and a second partition (3) is provided inside the outer shell (1) at one end near the air outlet (12). The first partition (2) and the second partition (3) are staggered, and the first partition (2) and the second partition (3) divide the inner cavity of the outer shell (1) into a flow channel chamber (4) and a heating chamber (5). The flow channel chamber (4) is located on one side of the heating chamber (5). The top of the outer shell (1) is open, and a detachable junction box (6) is installed at the upper open end of the outer shell (1). Multiple equally spaced heating tubes (61) are provided at the lower end of the junction box (6), and the heating tubes (61) are located inside the heating chamber (5).

2. The energy-saving explosion-proof electric heater according to claim 1, characterized in that, The flow channel chamber (4) has an "L" shaped cross-section and is fixed to the inner wall of the outer shell (1) by welding. The second partition (3) is located above one end of the flow channel chamber (4) and is fixed to the inner wall of the outer shell (1) by welding.

3. The energy-saving explosion-proof electric heater according to claim 2, characterized in that, The flow channel chamber (4) is connected to the heating chamber (5), and the flow channel chamber (4) has a "U" shaped structure.

4. The energy-saving explosion-proof electric heater according to claim 3, characterized in that, A sealing gasket (8) is provided between the junction box (6) and the opening end of the outer shell (1), and the sealing gasket (8) is made of high temperature resistant rubber.

5. An energy-saving explosion-proof electric heater according to claim 4, characterized in that, The junction box (6) has two handles (62) symmetrically arranged at both ends of its top.

6. The energy-saving explosion-proof electric heater according to claim 5, characterized in that, Flanges are provided on the outer ends of both the air inlet (11) and the air outlet (12).

7. The energy-saving explosion-proof electric heater according to claim 6, characterized in that, The flange opening of the air inlet (11) is provided with an installation groove (71) and a filter assembly (7) is provided in the installation groove (71).

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