Natural convection type electric heater

Abstract

The utility model discloses a natural convection type electric heater, and relates to the technical field of electric heaters, in particular to a natural convection type electric heater which comprises an electric heater shell, the electric heater shell is composed of a top cover, a front panel, a rear panel and a bottom plate, and a top isolation plate is arranged in the electric heater shell. The top isolation plate is welded to the bottom of the top cover and the inner side face of the rear panel, an air outlet gradually inclining downwards from inside to outside is formed in the upper portion of the front panel, and the top isolation plate is of an arc-shaped structure and guides air to the air outlet. Under the action of the top isolation plate, a relatively narrow space is formed at the top in the electric heater shell, so that the whole inner space of the electric heater forms a chimney shape with a wide bottom and a narrowed top, and hot air deposition at the top is effectively avoided under the obliquely upward guide of the top isolation plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heater technical field, concretely is a natural convection type electric heater. BACKGROUND

[0002] The principle of the convection type electric heater is to transmit the heat generated by the heating element to the outside of the electric heater through the chimney effect due to the natural convection principle, and the air inlet arranged at the bottom and the air outlet arranged at the top, and under the influence of the internal components, the heat of the heating element cannot be quickly transmitted to the outside of the electric heater, resulting in that the internal temperature of the electric heater is too high, the environmental temperature rises at a low efficiency, and due to the gradually increasing temperature in the internal of the electric heater, the temperature of the top surface is high, which causes the temperature control of the top surface of the electric heater to exceed the standard range. At the same time, due to the air inlets and air outlets arranged above and below, in the case of use in the bathroom, water droplets may enter the internal of the electric heater from the air outlet and the air inlet, and then there is a risk of electric leakage. Therefore, the utility model provides a natural convection type electric heater. SUMMARY

[0003] The utility model provides a natural convection type electric heater, solves the problem raised in the above background art.

[0004] In order to achieve the above purpose, the utility model discloses the following technical scheme: a natural convection type electric heater, comprising an electric heater shell, the electric heater shell is composed of a top cover, a front panel, a rear panel and a bottom plate, a top isolation plate is arranged in the internal of the electric heater shell, the top isolation plate is welded with the bottom of the top cover, and the top isolation plate is welded with the inner side surface of the rear panel, an air outlet gradually downwardly inclined from inside to outside is formed in the upper portion of the front panel, the top isolation plate is in an arc structure, and air is guided to the air outlet, and an internal heat insulation plate is installed in the internal of the electric heater shell, which divides the internal into a heating cavity and an electrical cavity, an overheat protector and a temperature sensing probe are installed in the electrical cavity, and the output end of the overheat protector and the temperature sensing probe extends into the heating cavity.

[0005] Optionally, a power circuit board is fixedly installed in the electrical cavity, a heating element is fixedly installed at the bottom of the heating cavity, the overheat protector is arranged on the power circuit board, and the overheat protector is located between the power circuit board connected with the fire wire of the power circuit board of the electric heater and the heating element. When the overheat protector is disconnected, the heating element connected with the fire wire is no longer electrified.

[0006] Optionally, a plurality of perforations are formed in the lower half of the internal heat insulation plate, one side of the heating element passes through the perforations and is installed with the internal heat insulation plate, and the heating element is fixed on the rear panel through bolts.

[0007] Optionally, the other side of the heating element is fixedly connected with a semicircular mounting ring, the top of the bottom plate is fixedly connected with a heating element support frame, a U-shaped spring is clamped between the heating element support frame and the mounting ring, and the bottom plate is provided with a wind inlet.

[0008] Optionally, the inner side of the front panel and the rear panel at both ends is fixedly connected with an inwardly folded inward flange, the inward flange on the rear panel is provided with an ear hole, and the inward flange on the front panel is fixedly connected with a hanging ear capable of being completely inserted into the ear hole and clamped with the ear hole.

[0009] Optionally, the front side of the top isolation plate is provided with an assembly limiting bend for supporting the top of the front panel, and the front side of the assembly limiting bend is provided with an assembly limiting protrusion for contacting the front panel.

[0010] The utility model has the following beneficial effects:

[0011] 1. The natural convection electric heater, the top of the inside of the electric heater shell is formed with a relatively narrow space under the action of the top isolation plate, so that the whole inside space of the electric heater is formed with a "chimney" shape of a wide bottom and a narrow top, and the deposition of hot air at the top is effectively avoided under the guidance of the upward inclination of the top isolation plate, and the efficiency of hot air discharge is effectively improved.

[0012] 2. The natural convection electric heater, under the action of the internal heat insulation plate and the air outlet structure, the water droplets falling in the bathroom cannot easily enter the inside of the electric heater shell, so that the waterproof effect is effectively improved, and under the isolation of the internal heat insulation plate, the influence of high temperature of the electric appliance and water vapor can be effectively avoided, so that the use is safer, and the service life of the electric appliance is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a structural schematic view of the internal heat insulation plate connection of the utility model;

[0015] Figure 3 It is a structural schematic view of the top isolation plate connection of the utility model;

[0016] Figure 4 It is a structural schematic view of the heating element connection of the utility model;

[0017] Figure 5 It is a structural schematic view of the power circuit board connection of the utility model;

[0018] Figure 6 It is a structural schematic view of the front panel connection of the utility model;

[0019] Figure 7 It is the structure schematic view of left view section of the utility model;

[0020] Figure 8 It is the structure schematic view of A place of the utility model.

[0021] In the drawing: 1, top cover;2, air outlet;3, front panel;4, top isolation plate;5, back panel;6, inner flange;7, ear hole;8, heating element;9, air inlet;10, temperature probe;11, internal heat insulation plate;12, power supply circuit board;13, overheat protector;14, hanging ear;15, heating element support frame;16, mounting ring;17, U-shaped spring;18, bottom plate;19, assembly limiting bending;20, assembly limiting protrusion. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figures 1 to 8 A natural convection electric heater, including electric heater shell, electric heater shell is by top cover 1, front panel 3, back panel 5, bottom plate 18 is composed, the inside of electric heater shell is provided with top isolation plate 4, top isolation plate 4 is welded with the bottom of top cover 1, and top isolation plate 4 is welded with the inside of back panel 5, and the upper portion of front panel 3 is provided with air outlet 2 that gradually inclines downward from inside to outside, in turn so that the water droplets falling in bathroom will not easily enter the inside of electric heater shell, thereby effectively improving its waterproof effect, air is guided to air outlet 2 through air outlet 2, and relatively narrow space is formed at the top inside electric heater shell, so that the whole internal space of electric heater forms the "chimney" shape of wide bottom and narrow top, and effectively avoids the deposition of hot air at the top under the guidance of the inclination of top isolation plate 4, effectively improves the efficiency of hot air discharge, and the inside of electric heater shell is provided with internal heat insulation plate 11 that divides it into heating cavity and electric cavity, overheat protector 13 and temperature probe 10 with output end extending into heating cavity are installed in electric cavity, the temperature inside heating cavity can be monitored through temperature probe 10, and overheat protector 13 functions to disconnect current and stop heating element 8 from continuing heating in the case of possible internal temperature being too high.

[0024] Please refer to Figures 1 to 8The electric appliance is internally fixedly installed with a power circuit board 12, and the bottom of the heating cavity is fixedly installed with a heating element 8. The power circuit board 12 is provided with an overheat protector 13, which is located between the power circuit board of the electric heater connected to the live wire and the heating element 8. When the overheat protector 13 is disconnected, the heating element 8 connected to the live wire is no longer electrified. The overheat protector 13 is a part of the power circuit board 12 and can disconnect the current when the internal temperature reaches the action temperature, so that the heating element 8 stops heating.

[0025] Please refer to Figures 1 to 8 The lower half of the internal heat insulation plate 11 is provided with a perforation, and one side of the heating element 8 passes through the perforation and is installed with the internal heat insulation plate 11 and is fixed on the rear panel 5 through a bolt, so that the heating element 8 can be stably installed in the middle of the heating cavity, and the heating element 8 is separated from the bottom plate 18 by a distance, avoiding the contact of water droplets with the heating element 8.

[0026] Please refer to Figures 1 to 8 The other side of the heating element 8 is fixedly connected with a semicircular mounting ring 16, the top of the bottom plate 18 is fixedly connected with a heating element support frame 15, and a U-shaped spring 17 is clamped between the heating element support frame 15 and the mounting ring 16. The bottom plate 18 is provided with an air inlet 9, and the U-shaped spring 17 can realize the connection between the heating element support frame 15 and the heating element 8, so as to stably support the heating element 8.

[0027] Please refer to Figures 1 to 8 The inner sides of the two ends of the front panel 3 and the rear panel 5 are fixedly connected with inwardly folded inner flanges 6, the inner flange 6 on the rear panel 5 is provided with an ear hole 7, the inner flange 6 on the front panel 3 is fixedly connected with a hanging ear 14 which can be completely inserted into the ear hole 7 and clamped with the ear hole 7, and the front panel 3 and the rear panel 5 are connected with the bottom plate 18 through bolts. The installation between the front panel 3 and the rear panel 5 is assembled through the clamping between the inner flanges 6 and the ear holes 7, and then a plurality of bolts are installed at the bottom. This connection mode not only has high reliability, but also can well control the gap between the front panel 3 and the rear panel 5, prolong the path of water vapor entering, and ensure the airtightness and stability of the installation.

[0028] Please refer to Figures 1 to 8 The front side of the top isolation plate 4 is provided with an assembly limiting bend 19 for supporting the top of the front panel 3, and the front side of the assembly limiting bend 19 is provided with an assembly limiting protrusion 20 for contacting the front panel 3, so as to ensure that the front panel 3 will not be concave due to thermal expansion and contraction during operation of the electric heater.

[0029] In summary, the natural convection electric heater, when in use, the lug 14 is inserted into the ear hole 7 and is clamped with it, and then the front panel 3 and the rear panel 5 are connected with the bottom plate 18 through bolts, when the cold air enters the heating cavity from the air inlet 9, the airflow is guided under the top isolation plate 4, so that the airflow can be directly discharged to the air outlet 2, and can be discharged to the outside of the electric heater more quickly, under the isolation of the top isolation plate 4, the top cover 1 can be isolated from the hot air to avoid that the temperature of the top cover 1 is too high, and the internal heat insulation plate 11 isolates the hot air in the electric heater from the parts assembled in the electric heater, so that the temperature of the electric cavity is relatively low, and the overheat protector 13 is installed on the internal heat insulation plate 11, which can disconnect the current and stop the heating element from continuing to heat in the case of possible internal temperature being too high. The internal heat insulation plate 11 can also prevent the water droplets entering the electric heater from the air inlet 9 and the air outlet 2 from reaching the electrified part on the right side of the heat insulation plate.

[0030] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A natural convection electric heater comprising an electric heater housing composed of a top cover (1), a front panel (3), a rear panel (5), a bottom panel (18), characterized in that: The inside of the electric heater shell is provided with a top partition plate (4) which is welded with the bottom of the top cover (1) and welded with the inner side of the back panel (5), the front panel (3) is provided with an air outlet (2) which is gradually inclined downward from inside to outside, the top partition plate (4) is an arc structure which guides air to the air outlet (2), and an inside heat insulation plate (11) is installed in the inside of the electric heater shell to divide the inside into a heating cavity and an electric appliance cavity, the electric appliance cavity is provided with a thermal overload protector (13) and a temperature sensing probe (10) whose output end extends into the heating cavity.

2. The natural convection electric heater according to claim 1, wherein: The electric appliance cavity is fixedly provided with a power circuit board (12), the bottom of the heating cavity is fixedly provided with a heating element (8), the power circuit board (12) is provided with the thermal overload protector (13), the thermal overload protector (13) is located between the power circuit board of the electric heater and the heating element (8), when the thermal overload protector (13) is disconnected, the heating element (8) connected after the live wire is no longer electrified.

3. The natural convection electric heater according to claim 2, characterized in that: The lower half of the inside heat insulation plate (11) is provided with a perforation, one side of the heating element (8) passes through the perforation and is installed with the inside heat insulation plate (11) and is fixed on the back panel (5) through bolts.

4. The natural convection electric heater according to claim 3, wherein: The other side of the heating element (8) is fixedly connected with a semicircular mounting ring (16), the top of the bottom plate (18) is fixedly connected with a heating element support frame (15), a U-shaped spring (17) is clamped between the heating element support frame (15) and the mounting ring (16), and the bottom plate (18) is provided with an air inlet (9) which penetrates through.

5. The natural convection electric heater according to claim 4, wherein: The inner side of both ends of the front panel (3) and the back panel (5) is fixedly connected with an inwardly folded inner flange (6), the inner flange (6) on the back panel (5) is provided with an ear hole (7), and the inner flange (6) on the front panel (3) is fixedly connected with a hanging ear (14) which can completely extend into the ear hole (7) and is clamped with the ear hole (7).

6. The natural convection electric heater according to claim 5, characterized in that: The front side of the top partition plate (4) is provided with an assembly limiting bend (19) for supporting the top of the front panel (3), and the front side of the assembly limiting bend (19) is provided with an assembly limiting protrusion (20) for contacting the front panel (3).

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