Electric heater

Abstract

The utility model discloses an electric heater, and relates to the field of electric heaters, in particular to an electric heater junction box, and a detachable junction box end cover is arranged at the top of the electric heater junction box. The sealing assembly is arranged, the electric heating pipe is completely packaged in the sealing shell, a medium to be heated can be prevented from leaking from the sealing shell, possible electrical faults or safety accidents are avoided, and meanwhile, the electric heating pipe is not prone to falling off when the electric heating pipe is overloaded or overhigh in temperature after being used for a long time. A medium to be heated in the sealing shell is gradually gasified, pressure is generated in the sealing shell to push an exhaust round hole in the moving rod to be connected with the outside, excessive heat of the sealing shell is discharged, when the pressure pushes the moving rod, air in the sealing shell vibrates, sound is generated, and the heat of the medium to be heated is generated. An operator is warned that the electric heater is in an overload or over-high temperature state, and the operator can conveniently adjust the power of the electric heater in time.

Description

Technical Field

[0001] The utility model relates to the field of electric heaters, and particularly relates to an electric heater. Background Art

[0002] An electric heating tube is a tubular electric heating element, which is composed of a metal tube, a helical resistance wire, crystalline magnesium oxide powder, etc. Electric heating tube products generally use high-quality imported stainless steel tubes, imported high-temperature magnesium oxide powder, high-quality electric heating wires and other materials to make heating elements, and use stainless steel to make other structural parts, with excellent overall performance, long service life and easy maintenance.

[0003] In the prior art, during the use of an electric heater, the electric heating tube is in a high-temperature and high-pressure state. Once the electric heating tube is overloaded, it is easy to cause the surface of the electric heating tube to rupture, and the heating medium enters the electric heating tube, posing a safety hazard.

[0004] Therefore, it is very necessary to invent an electric heater to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an electric heater to solve the problem that when the electric heater is accidentally in an overloaded working state during use, the heat inside the electric heater continuously increases, the pressure inside the electric heater continuously increases, it is easy to cause the surface of the electric heating tube to rupture, and the heating medium enters the electric heating tube, posing a safety hazard.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: An electric heater, including an electric heater junction box, a detachable junction box end cover is arranged on the top of the electric heater junction box, a sealed housing is arranged below the electric heater junction box, and a plurality of electric heating tubes are arranged inside the electric heater junction box;

[0007] The utility model also discloses a leakage prevention structure for an electric heating tube, further including a sealing flange, the sealing flange is sleeved outside the electric heating tube, a plurality of threaded holes are opened on the top of the sealing flange, and a sealing component is arranged inside the threaded holes. The sealing component includes a sealing screw, a through hole is opened inside the sealing screw, a moving rod is slidably connected inside the through hole, both ends of the moving rod are respectively fixedly connected with an extending end and a moving end, and the extending end is located above the moving end. A conveying groove is opened inside the moving rod, two exhaust round holes are opened on the outside of the moving rod, and a spring is arranged between one end of the sealing screw and the upper surface of the moving end, and the spring is sleeved on the moving rod.

[0008] Preferably, the extending end and the moving end are respectively located on the upper and lower sides of the sealing screw, the bottom surface of the extending end is attached to the upper surface of the sealing screw, and the diameter of the moving end is larger than the diameter of the conveying groove.

[0009] Preferably, there are two exhaust round holes, and both of the two exhaust round holes communicate with the conveying groove.

[0010] Preferably, the distance between the upper surface of the mobile end and the bottom of the sealing screw is greater than the distance between the center of the exhaust round hole and the upper surface of the sealing screw.

[0011] Preferably, the sealing flange and the sealing housing are connected to each other by a sealing screw.

[0012] Technical effects and advantages of the present utility model:

[0013] In this utility model, a sealing assembly is provided to completely encapsulate the electric heating tube in the sealing housing. When the electric heating tube is overloaded or overheated during long-term use, the medium to be heated in the sealing housing gradually vaporizes, generating pressure in the sealing housing, pushing the exhaust round hole on the moving rod to connect with the outside, and discharging the excessive heat in the sealing housing. When the pressure pushes the moving rod, it will also cause air oscillation in the sealing housing, generating a sound, which is convenient for warning the operator that the electric heater is in an overloaded or overheated state at this time, facilitating the operator to timely adjust the power of the electric heater, making the electric heating tube in a normal working state, and avoiding rupture due to overheating. Description of the drawings

[0014] Figure 1 It is a schematic structural diagram of the electric heater of the present utility model.

[0015] Figure 2 It is a schematic structural diagram of the electric heating tube of the present utility model.

[0016] Figure 3 It is a schematic structural diagram of the sealing assembly of the present utility model.

[0017] Figure 4 It is a schematic structural diagram of the moving rod of the present utility model.

[0018] In the figure: 1. Electric heater junction box; 101. Junction box end cover; 2. Electric heating tube; 3. Sealing flange; 4. Sealing housing; 5. Sealing screw; 6. Moving rod; 601. Extended end; 602. Mobile end; 603. Conveying groove; 604. Exhaust round hole; 7. Spring. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0020] The present utility model provides as Figures 1 - 4 shown, an electric heater, including an electric heater junction box 1. The electric heater junction box 1 protects the connecting wires of the electric heater to ensure the normal use of the electric heater. A detachable junction box end cover 101 is provided at the top of the electric heater junction box 1. The junction box end cover 101 is used to form a sealed space for the electric heater junction box 1 to prevent dust from entering the electric heater junction box 1 and affecting the connection of the connecting wires of the electric heater. A sealed housing 4 is provided below the electric heater junction box 1. The sealed housing 4 is used to hold the medium to be heated, and the medium to be heated is water. A water inlet pipe and a drain pipe are respectively fixedly connected to the outside of the sealed housing 4 for delivering water into the sealed housing 4 and discharging the water from the sealed housing 4 after heating. A plurality of electric heating tubes 2 are provided inside the electric heater junction box 1. The electric heating tubes 2 are composed of a metal tube spiral resistance wire, crystalline magnesium oxide powder, etc., and are used to heat the medium to be heated;

[0021] The present utility model also discloses an anti-leakage structure for an electric heating tube, which further includes a sealing flange 3 sleeved outside the electric heating tube 2. A plurality of threaded holes are provided at the top of the sealing flange 3, and a sealing component is arranged inside the threaded holes. The sealing component includes a sealing screw 5. The sealing flange 3 and the sealing housing 4 are connected to each other by the sealing screw 5. The sealing screws 5 are circularly arrayed around the axis of the sealing flange 3. A through hole is provided inside the sealing screw 5, and a moving rod 6 is slidably connected inside the through hole. Two ends of the moving rod 6 are respectively fixedly connected with an extending end 601 and a moving end 602, and the extending end 601 is located above the moving end 602. The extending end 601 and the moving end 602 are respectively located on the upper and lower sides of the sealing screw 5, and the bottom surface of the extending end 601 is in contact with the upper surface of the sealing screw 5. The diameter of the moving end 602 is larger than the diameter of the conveying groove 603 for restricting the moving distance of the moving rod 6. A conveying groove 603 is provided inside the moving rod 6. Two exhaust round holes 604 are provided on the outside of the moving rod 6, and both of the two exhaust round holes 604 communicate with the conveying groove 603. The distance between the upper surface of the moving end 602 and the bottom of the sealing screw 5 is greater than the distance between the center of the exhaust round hole 604 and the upper surface of the sealing screw 5 for the exhaust round hole 604 to move out of the through hole. A spring 7 is arranged between one end of the sealing screw 5 and the upper surface of the moving end 602, and the spring 7 is sleeved on the moving rod 6. Two ends of the spring 7 are respectively fixedly connected to the moving end 602 and the bottom of the sealing screw 5. The spring 7 is used to make the extending end 601 and the sealing screw 5 fit together to ensure the airtightness in the sealing housing 4.

[0022] In this utility model, a sealing component is provided to completely encapsulate the electric heating tube 2 in the sealing housing 4 to ensure the sealing performance of the electric heating tube 2. When the electric heating tube 2 is in an overloaded state or at a too high temperature for a long time, the medium to be heated in the sealing housing 4 gradually vaporizes, generating pressure inside the sealing housing 4, pushing the exhaust round hole 604 on the moving rod 6 to connect with the outside, discharging the excessive heat in the sealing housing 4. At the same time, when the pressure pushes the moving rod 6, it will also cause air oscillation inside the sealing housing 4, generating a sound, which is convenient for warning the operator that the electric heater is overloaded or at a too high temperature, facilitating timely adjustment of the power of the electric heater to avoid possible electrical faults or safety accidents.

[0023] Specifically, when the electric heating tube 2 is overloaded, the medium to be heated generates a vaporization phenomenon through temperature, thereby increasing the pressure inside the sealed housing 4. After the pressure inside the sealed housing 4 increases, the gas in the sealed housing 4 is squeezed, and the gas pushes the moving rod 6 to move vertically upward. The exhaust round hole 604 on the moving rod 6 is in communication with the outside world after moving, and both the gas and the vaporized medium to be heated are discharged to the outside world through the exhaust round hole 604. The vaporized medium to be heated oscillates with the air inside the sealed housing 4 under the action of pressure, thereby generating a sound.

Claims

1. An electric heater, comprising an electric heater junction box (1), characterized in that: A detachable terminal cover (101) is provided at the top of the electric heater junction box (1). A sealing housing (4) is provided below the electric heater junction box (1). A plurality of electric heating tubes (2) are provided inside the electric heater junction box (1). The electric heater includes an anti-leakage structure for the electric heating tubes. The anti-leakage structure for the electric heating tubes includes a sealing flange (3). The sealing flange (3) is sleeved outside the electric heating tube (2). A plurality of threaded holes are provided at the top of the sealing flange (3), and a sealing component is provided inside the threaded holes. The sealing component includes a sealing screw (5). A through hole is provided inside the sealing screw (5). A moving rod (6) is slidably connected inside the through hole. Two ends of the moving rod (6) are respectively fixedly connected with an extending end (601) and a moving end (602), and the extending end (601) is located above the moving end (602). A conveying groove (603) is provided inside the moving rod (6). Two exhaust round holes (604) are provided outside the moving rod (6). A spring (7) is provided between one end of the sealing screw (5) and the upper surface of the moving end (602), and the spring (7) is sleeved on the moving rod (6). The extending end (601) and the moving end (602) are respectively located on the upper and lower sides of the sealing screw (5), and the bottom surface of the extending end (601) is in contact with the upper surface of the sealing screw (5). The diameter of the moving end (602) is larger than the diameter of the conveying groove (603). Both of the two exhaust round holes (604) are communicated with the conveying groove (603).

2. The electric heater according to claim 1, characterized in that: The distance between the upper surface of the moving end (602) and the bottom of the sealing screw (5) is greater than the distance between the center of the exhaust round hole (604) and the upper surface of the sealing screw (5).

3. An electric heater according to claim 1, characterized in that: The sealing flange (3) and the sealing housing (4) are connected to each other by the sealing screw (5).

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