An electric heater

Abstract

The present invention provides an electric heater, which includes a housing body with an electric heating film disposed therein; a support frame provided at the bottom of the electric heating film in the housing body, with a limiting portion provided thereon, and the limiting portion is adapted to receive the electric heating film; a connecting bracket provided inside the housing body and connected to the housing body, with a card hole provided on one of the connecting bracket and the electric heating film, and a buckle adapted to be embedded in the card hole provided on the other of the connecting bracket and the electric heating film. By providing the support frame and the connecting bracket, the side surface and the bottom surface of the electric heating film can be respectively limited, and the electric heating film can be fixed. During the assembly process of the electric heating film, the connecting bracket is fixed to the housing body, the electric heating film is placed on the limiting portion, and the electric heating film is fixed by the cooperated fixed buckle and card hole. With such a setting, fewer components are required for assembly, and at the same time, the assembly steps are simple. The installation can be completed by a single person, reducing the number of assembly personnel, improving the production efficiency of the product, and reducing the production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to an electric heater. Background Art

[0002] Generally, electric heaters mainly rely on natural convection heat transfer and radiation heat transfer. Natural convection heat transfer uses the density difference between hot and cold air as the driving force to drive the indoor air circulation, thereby adjusting the indoor temperature. The heat of radiation heat transfer is easily absorbed by the human body and the clothes worn by the human body, resulting in good heating effect for the human body and high efficiency and energy saving.

[0003] Among electric heaters, the electrothermal film electric heater combines forced convection and radiation to improve the heating rate and heating effect of the electric heater, effectively enhancing the user experience. The electrothermal film electric heater adopts a hot air duct structure, and the heat transfer method is enhanced convection. It has a fast heat start-up speed and cools down rapidly after power-off. Since the electrothermal film has no oxidation during heating, its service life can reach 100,000 hours, and it also has the characteristics of small volume and beautiful appearance.

[0004] In the prior art, the fixing structure of the electrothermal film in the electric heater is in the form of a square frame, etc., which requires a large number of assembly parts and complex installation steps. In addition, there is a lack of a limiting structure during the installation of the electrothermal film. During the assembly process, at least two installers need to cooperate with each other. One person stabilizes the electrothermal film sheet or the bracket, and the other person adjusts the position of the other electrothermal film sheet or the bracket while fastening the electrothermal film sheet to the bracket with screws. This results in a difficult assembly process, a large installation difficulty, and low work efficiency. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of complex assembly and low installation efficiency of the heating element in the prior art, and thus provide an electric heater.

[0006] The present invention provides an electric heater, including: an outer housing, in which an electrothermal film sheet is disposed;

[0007] A support frame is disposed at the bottom of the electrothermal film sheet in the outer housing, and a limiting portion is provided thereon, and the limiting portion is adapted to receive the electrothermal film sheet;

[0008] A connecting bracket is disposed inside the outer housing and is connected to the outer housing. One of the connecting bracket and the electrothermal film sheet is provided with a card hole, and the other of the connecting bracket and the electrothermal film sheet is provided with a buckle adapted to be embedded in the card hole.

[0009] The connecting bracket includes:

[0010] Side plates, at least part of which is fixedly connected to the inner wall of the outer housing and forms a closed air duct with the inner wall of the outer housing;

[0011] The diaphragm bracket, with the side plates connected to each other, has card holes or buckles provided thereon.

[0012] The diaphragm bracket includes:

[0013] An installation surface, arranged parallel to the heat dissipation surface of the electrothermal diaphragm, on which the card holes or buckles are provided;

[0014] A thrust surface, fixedly connected to the installation surface and bent towards the electrothermal diaphragm.

[0015] The card holes are provided on the electrothermal diaphragm, and the buckles are provided on the installation surface.

[0016] The buckle includes a plurality of elastic pieces arranged at intervals and forming a ring.

[0017] On one side of the thrust surface facing the electrothermal diaphragm, a plurality of rib bodies are provided, protruding towards the electrothermal diaphragm.

[0018] At the top of the diaphragm bracket in the vertical direction, a baffle is further provided. The baffle is fixedly connected to the thrust surface and the installation surface respectively, and at least a part of the projection of the baffle on the horizontal plane acts on the electrothermal diaphragm.

[0019] The electric heater further includes side plates, arranged on the side of the thrust surface facing away from the heating element and fixedly connected to the thrust surface.

[0020] The thrust surface includes a plurality of bending parts;

[0021] The side plates include a plurality of receiving holes corresponding to the bending parts, suitable for engaging with the bending parts.

[0022] The side plates and the thrust surface are connected by screws.

[0023] At the top of the side plates in the vertical direction, a top plate is provided, and the top plate is fixedly connected to the inner side surface of the top wall of the outer housing.

[0024] The limiting part is a groove body, arranged at the top of the support frame, suitable for accommodating the heating element.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The present invention provides an electric heater, including an outer housing with an electrothermal diaphragm disposed therein; a support frame, arranged at the bottom of the electrothermal diaphragm in the outer housing, on which a limiting part is provided, and the limiting part is suitable for receiving the electrothermal diaphragm; a connecting bracket, arranged inside the outer housing and connected to the outer housing, with a card hole provided on one of the connecting bracket and the electrothermal diaphragm, and a buckle suitable for being embedded in the card hole provided on the other of the connecting bracket and the electrothermal diaphragm.

[0027] By setting up the support frame and the connecting bracket, the side and bottom of the electrothermal film can be limited respectively, and the electrothermal film can be fixed. During the assembly of the electrothermal film, the connecting bracket can be fixed on the outer casing first, and the electrothermal film is placed in the limiting part, and the electrothermal film is fixed by the cooperating buckle and the card hole. With this setting, fewer components are required for assembly, and the assembly steps are simple. The installation can be completed by a single person, reducing the number of assembly workers, improving the production efficiency of the product, and reducing the production cost.

[0028] 2. For the electric heater provided by the present invention, the connecting bracket includes: a side plate, at least part of which is fixedly connected to the inner wall of the outer casing and forms a closed air duct with the inner wall of the outer casing; a film support, connected to the side plate, and the card hole or the buckle is arranged on the film support.

[0029] By setting the side plate, it can be fixed to the inner wall of the outer casing, with the built-in electrothermal film, to form an integrated closed air duct. Compared with the structure where the entire outer casing is used as the closed air duct, the inner diameter of the air duct is smaller, less heat escapes through the air duct wall or gap, the heat insulation efficiency is higher, the thermal efficiency of the electric heater is higher. At the same time, the sealed design of the electrothermal film with the side plate and the bottom support frame makes the direction of the heat flow in the air duct more stable and clear, the air duct structure is better, and the noise is smaller.

[0030] 3. For the electric heater provided by the present invention, the film support includes: a mounting surface, arranged parallel to the heat dissipation surface of the electrothermal film, and the card hole or the buckle is arranged thereon; a thrust surface, fixedly connected to the mounting surface and bent in the direction towards the electrothermal film.

[0031] The thrust surface and the mounting surface form a bend, and at the same time, the buckle or the card hole is arranged on the mounting surface parallel to the electrothermal film. During the assembly of the electrothermal film, this setting allows the film support and the side plate to be fixed on the outer casing first, and then the bottom side of the electrothermal film is placed on the limiting part of the support frame. Since the mounting surface is parallel to the heat dissipation surface of the electrothermal film and is provided with a buckle or a card hole, and at the same time, the bent thrust surface connected to the mounting surface can also limit and position the electrothermal film. The electrothermal film can be fixed and abutted on the mounting surface through the cooperating buckle or card hole, and the assembly process can be operated by a single installer, reducing the number of assembly workers, improving the production efficiency of the product, and reducing the production cost.

[0032] 4. For the electric heater provided by the present invention, the buckle includes a plurality of elastic pieces arranged at intervals and forming a ring.

[0033] The buckle protrudes towards the electrothermal film. At the same time, the card hole on the electrothermal film is engaged and fixed with the buckle of the film bracket. This setting enables the electrothermal film placed on the limiting part of the support frame to be connected with the connection bracket fixed on the outer shell through forms such as pressing, facilitating the operator to install and fix the electrothermal film, improving the installation efficiency and reducing the installation difficulty.

[0034] 5. In the electric heater provided by the present invention, a plurality of ribs are provided on one side of the thrust surface facing the electrothermal film, and the ribs protrude towards the electrothermal film.

[0035] The ribs arranged in this way serve as reinforcing ribs, increasing the strength of the film bracket to ensure that it can bear the stress of the fixed electrothermal film. At the same time, the ribs protruding towards the electrothermal film also have a supplementary limiting function. When used in conjunction with the film buckle, they limit the lateral displacement of the electrothermal film, preventing the electrothermal film from shaking under external force and even preventing situations such as unclipping.

[0036] 6. In the electric heater provided by the present invention, a baffle is further provided at the top of the film bracket in the vertical direction. The baffle is fixedly connected to the thrust surface and the installation surface respectively, and at least a part of the projection of the baffle on the horizontal plane acts on the electrothermal film.

[0037] The setting of the baffle increases the structural strength of the film bracket forming the bend. When used in conjunction with the film buckle, it limits the displacement of the electrothermal film in the vertical direction and prevents the electrothermal film from unclipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a partial structural schematic diagram of the inner side of the outer shell of the electric heater provided in the embodiment of the present invention;

[0040] Figure 2 For Figure 1 It is a schematic diagram of the structure of part A of the inner side of the outer shell of the shown electric heater;

[0041] Figure 3 For Figure 1 It is a schematic diagram of the structure of the inner side plate of the outer shell of the shown electric heater;

[0042] Figure 4 For Figure 1 It is a schematic diagram of the structure of the inner electrothermal film of the outer shell of the shown electric heater;

[0043] Figure 5 is Figure 1 a schematic structural view of the internal support frame of the electric heater housing shown;

[0044] Figure 6 is Figure 1 a schematic structural view of the internal diaphragm support of the electric heater housing shown;

[0045] Figure 7 is Figure 6 an enlarged schematic view of the structure of part B of the diaphragm support shown;

[0046] Figure 8 a schematic cross-sectional view of the electric heater provided in the embodiment of the present invention;

[0047] Figure 9 a schematic perspective view of a partial structure of the electric heater provided in the embodiment of the present invention;

[0048] Figure 10 is Figure 9 an enlarged schematic view of the structure of part C of the partial structure of the electric heater shown;

[0049] Explanation of reference numerals:

[0050] 1 - electric heating diaphragm; 2 - support frame; 3 - diaphragm support; 4 - side plate; 5 - housing; 21 - limiting part; 311 - buckle; 31 - mounting surface; 32 - thrust surface; 11 - card hole; 321 - rib; 33 - baffle; 41 - receiving hole; 322 - bending part; 42 - top plate. Detailed implementation manners

[0051] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] Such as Figure 1 - Figure 10 In this embodiment, an electric heater is provided, which includes: a housing 5, in which an electric heating film 1 is disposed; a support frame 2, disposed at the bottom of the electric heating film 1 in the housing 5, on which a limiting portion 21 is provided, and the limiting portion 21 is adapted to receive the electric heating film 1; a connecting bracket, disposed inside the housing 5 and connected to the housing 5, a card hole 11 is provided on the electric heating film 1, and a buckle 311 adapted to be embedded in the card hole 11 is provided on the connecting bracket. As an alternative embodiment, the card hole 11 can be provided on the connecting bracket, and the buckle 311 can be provided on the electric heating film 1.

[0056] By providing the support frame 2 and the connecting bracket, the side surface and the bottom surface of the electric heating film 1 can be respectively limited, and the electric heating film can be fixed. During the process of assembling the electric heating film 1, the connecting bracket can be first fixed on the housing 5, and the electric heating film 1 can be placed on the limiting portion 21, and the electric heating film 1 can be fixed by the cooperating buckle 311 and the card hole 11. With such a setting, fewer components are required for assembly, and at the same time, the assembly steps are simple, and the installation can be completed by a single person's operation, reducing the assembly personnel, improving the production efficiency of the product, and reducing the production cost.

[0057] In this embodiment, the electric heating film 1 is disposed in a planar shape in the housing 5, a blower is disposed inside the support frame 2, and is fixedly connected to the side plate 4 on the connecting bracket and the housing 5. The electric heating film 1 is disposed in the middle of the housing 5. In this embodiment, the electric heater is a single-film electric heater. Compared with the frame structure that needs to be provided in cooperation with multiple groups of film sheets in the prior art multi-film electric heaters, the cooperation relationship is simple, the assembly is simple and easy, there are fewer components, the structure is simple, the assembly efficiency of the product can be effectively improved, and the production cost can be reduced.

[0058] The connecting bracket includes: a side plate 4, at least partially fixedly connected to the inner wall of the outer casing 5 and forming a closed air duct with the inner wall of the outer casing 5; a diaphragm bracket 3, connected to the side plate 4, and provided with a clamping hole 11 or a buckle 311 on the diaphragm bracket 3. In this embodiment, there are two side plates 4 and two diaphragm brackets 3, which are parallel in the vertical direction, and one fixedly connected side plate 4 and diaphragm bracket 3 are respectively arranged on both sides of the electric heating diaphragm 1.

[0059] By providing the side plate 4, the electric heating diaphragm 1 can be built in by being fixedly connected to the inner wall of the outer casing 5 to form an integrated closed air duct. Compared with the structure in which the entire outer casing 5 serves as the closed air duct, the inner diameter of the air duct is smaller, the heat dissipated through the air duct wall or gap is less, the heat insulation efficiency is higher, the heat efficiency of the electric heater is higher. At the same time, the sealing design of the electric heating diaphragm 1 with the side plate 4 and the bottom support frame 2 makes the heat flow direction in the air duct more stable and clear, the air duct structure is better, and the noise is smaller.

[0060] The diaphragm bracket 3 includes: a mounting surface 31, arranged parallel to the heat dissipation surface of the electric heating diaphragm 1; a thrust surface 32, fixedly connected to the mounting surface 31 and bent in the direction towards the electric heating diaphragm 1. In this embodiment, the clamping hole 11 is provided on the electric heating diaphragm 1, and the buckle 311 is provided on the mounting surface 31 and protrudes towards the electric heating diaphragm 1. As a changeable implementation method, the clamping hole 11 can be provided on the mounting surface 31, and the buckle 311 is provided on the electric heating diaphragm 1 and protrudes towards the mounting surface 31.

[0061] The thrust surface 32 and the mounting surface 31 form a bend, and at the same time, the buckle 311 or the clamping hole 11 is provided on the mounting surface 31 arranged parallel to the electric heating diaphragm 1. During the process of assembling the electric heating diaphragm 1, this setting can first fix the diaphragm bracket 3 and the side plate 4 on the outer casing 5, and then place the bottom side of the electric heating diaphragm 1 on the limiting part 21 of the support frame 2. Since the mounting surface 31 is parallel to the heat dissipation surface of the electric heating diaphragm 1 and is provided with the buckle 311 or the clamping hole 11, and at the same time, the bent thrust surface 32 connected to the mounting surface 31 can also play a role of limiting and positioning the electric heating diaphragm 1, the electric heating diaphragm 1 can be fixed and abutted against the mounting surface 31 through the mutually cooperating buckle 311 or clamping hole 11, and the assembly process can be operated by a single installer, reducing the number of assembly workers, improving the production efficiency of the product, and reducing the production cost.

[0062] The buckle 311 includes elastic pieces arranged at intervals and forming a ring. In this embodiment, there are two buckles 311 on a single mounting surface 31, arranged in the vertical direction, and four clamping holes 11 corresponding to the buckles 311 are provided on the electric heating diaphragm 1.

[0063] The end of the elastic piece facing away from the mounting surface 31 is provided with barbs. After the card holes 11 on the electrothermal film piece 1 are engaged with the buckles 311, the barbs are engaged with the card holes 11 to fixedly connect the mounting surface 31 and the elastic piece. During the process of the spaced-apart and annular elastic pieces being engaged with the card holes 11, they enter the card holes 11 by means of shrinkage deformation, and the barbs protrude from the card holes 11 and then return to limit the electrothermal film piece 1. As a changeable implementation manner, the film buckle 311 can be a flexible member provided in a ring shape or a column shape.

[0064] The buckle 311 protrudes towards the electrothermal film piece 1. At the same time, the card holes 11 on the electrothermal film piece 1 are engaged and fixed with the buckle 311 of the film bracket 3. Such a setting enables the electrothermal film piece 1 placed on the limiting portion 21 of the support frame 2 to be connected and cooperated with the connection bracket fixed on the outer housing 5 by means of pressing or the like, which is convenient for the operator to install and fix the electrothermal film piece 1, improves the installation efficiency, and reduces the installation difficulty.

[0065] On the side of the thrust surface 32 facing the electrothermal film piece 1, a plurality of ribs 321 are provided, and the ribs 321 protrude towards the electrothermal film piece 1. In this embodiment, the ribs 321 are arranged uniformly along the vertical direction of the thrust surface 32. The ribs 321 arranged in this way serve as reinforcing ribs, increasing the strength of the film bracket 3 to ensure that it can bear the stress of the fixed electrothermal film piece 1. At the same time, the ribs 321 protruding towards the electrothermal film piece 1 also have a supplementary limiting function. When used in cooperation with the film buckle 311, they limit the lateral displacement of the electrothermal film piece 1 to prevent the electrothermal film piece 1 from shaking under the action of external force or even being disengaged.

[0066] At the top of the film bracket 3 in the vertical direction, a baffle 33 is further provided. The baffle 33 is fixedly connected to the thrust surface 32 and the mounting surface 31 respectively, and at least a part of the projection of the baffle 33 on the horizontal plane acts on the electrothermal film piece 1. The setting of the baffle 33 increases the structural strength of the film bracket 3 forming a bend. When used in cooperation with the film buckle 311, it limits the displacement of the electrothermal film piece 1 in the vertical direction to prevent the electrothermal film piece 1 from being disengaged.

[0067] The electric heater further includes a side plate 4, which is arranged on the side of the thrust surface 32 facing away from the heating element and is fixedly connected to the thrust surface 32. The thrust surface 32 includes a plurality of bending portions 322; the side plate 4 includes a plurality of receiving holes 41 corresponding to the bending portions 322 and adapted to be engaged with the bending portions 322.

[0068] In this embodiment, the bending portion 322 is a bend that extends horizontally away from the thrust surface 32 and bends downward, and can penetrate into the receiving hole 41. When the thrust surface 32 moves downward, the bending portion 322 can limit the film bracket 3 from detaching from the side plate 4.

[0069] Screw holes are correspondingly provided on the side plate 4 and the thrust surface 32. When the bending portion 322 completely extends into the receiving hole 41 and the diaphragm bracket 3 moves downward to the limit position, the screw holes on the side plate 4 and the thrust surface 32 coincide and are fixed by installing screws. With this setting, the bending portion 322 and the receiving hole 41 allow the installer to first engage them during the installation process and then install the screws. A single installer can operate, which is simple and labor-saving.

[0070] As a variable implementation, the side plate 4 and the diaphragm bracket 3 can be integrally formed.

[0071] As another variable implementation, the bending portion 322 can be set as a barb and is in interference connection with the receiving hole 41.

[0072] The side plate 4 is provided with a top plate 42 at the top in the vertical direction, and the top plate 42 is fixedly connected to the inner side surface of the top wall of the outer housing 5. In this embodiment, the edge of the side plate 44 abuts against the inner wall of the outer housing 55. As a variable implementation, the side plate 44 can be fixedly connected to the inner wall of the outer housing 55 in the vertical direction or the bottom direction.

[0073] The limiting portion 21 is a groove body provided at the top of the support frame 2 and is adapted to accommodate the electric heating diaphragm 1.

[0074] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementations here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An electric heater, characterized in that, Comprising: An outer housing (5), in which an electric heating film (1) is built. A support frame (2), disposed at the bottom of the electric heating film (1) in the outer housing (5), on which a limiting portion (21) is provided, and the limiting portion (21) is adapted to receive the electric heating film (1). A connecting bracket, disposed inside the outer housing (5) and connected to the outer housing (5), a card hole (11) is provided on one of the connecting bracket and the electric heating film (1), and a buckle (311) adapted to be embedded in the card hole (11) is provided on the other of the connecting bracket and the electric heating film (1). The connecting bracket includes: Side plates (4), at least partially fixedly connected to the inner wall of the outer housing (5) and forming a closed air duct with the inner wall of the outer housing (5). A film support (3), connected to the side plates (4), and the card hole (11) or the buckle (311) is provided on the film support (3). The film support (3) includes: An installation surface (31), arranged parallel to the heat dissipation surface of the electric heating film (1), and the card hole (11) or the buckle (311) is provided on it. A thrust surface (32), fixedly connected to the installation surface (31) and bent in the direction towards the electric heating film (1). A plurality of ribs (321) are provided on the side of the thrust surface (32) facing the electric heating film (1), and the ribs (321) protrude towards the electric heating film (1). A blower is provided in the support frame (2).

2. The electric heater according to claim 1, characterized in that, The card hole (11) is provided on the electric heating film (1), and the buckle (311) is provided on the installation surface (31).

3. The electric heater according to claim 2, characterized in that, The buckle (311) includes a plurality of elastic pieces arranged at intervals and forming a ring.

4. The electric heater according to any one of claims 1 - 3, characterized in that, A baffle (33) is further provided at the top end of the film support (3) in the vertical direction, the baffle (33) is fixedly connected to the thrust surface (32) and the installation surface (31) respectively, and at least a part of the projection of the baffle (33) on the horizontal plane acts on the electric heating film.

5. The electric heater according to any one of claims 1 - 3, characterized in that, The side plates (4) are disposed on the side of the thrust surface (32) facing away from the heating element and fixedly connected to the thrust surface (32).

6. The electric heater according to claim 5, characterized in that, The thrust surface (32) includes a plurality of bending portions (322); The side plates (4) include a plurality of receiving holes (41) corresponding to the bending portions (322), and are adapted to be engaged with the bending portions (322).

7. The electric heater according to claim 6, characterized in that, The side plates (4) and the thrust surface (32) are connected by screws.

8. The electric heater according to claim 6, characterized in that, A top plate (42) is provided at the top end of the side plates (4) in the vertical direction, and the top plate (42) is fixedly connected to the inner side surface of the top wall of the outer housing (5).

9. The electric heater according to any one of claims 1 - 3, characterized in that, The limiting portion (21) is a groove body, disposed at the top of the support frame (2), and is adapted to receive the electric heating film (1).

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