Liquid heater with closed structure

Abstract

The utility model relates to a liquid heater, especially a liquid heater with closed structure. It comprises a kettle body and a heating disc. A heat-conducting silicone grease layer is arranged between the kettle body and the heating disc. An annular support is arranged at the bottom of the kettle body, and the annular support is arranged around the outer periphery of the heat-conducting silicone grease layer. A clamping disc is arranged at the top of the heating disc. The clamping disc is matched with the annular support. A flexible part is arranged at the side of the clamping disc. The clamping disc is sealedly connected with the annular support through the flexible part. A sealed cavity is formed between the clamping disc and the bottom of the kettle body. The heat-conducting silicone grease layer is located in the sealed cavity. The utility model sets the annular support at the bottom of the kettle body, sets the clamping disc at the top of the heating disc, sets the flexible part at the side of the clamping disc, and sealsly connects the clamping disc with the annular support through the flexible part. A certain gap is formed between the clamping disc and the bottom of the kettle body, and a sealed cavity for containing the heat-conducting silicone grease layer is formed. Thus, the volatilization of silicone oil is slowed down, and the heat-conducting silicone grease is prevented from overflowing around.

Description

Technical Field

[0001] This utility model relates to a liquid heater, and more particularly to a liquid heater with a closed structure. Background Technology

[0002] The same applicant's earlier patent application, with publication number CN223311034U, discloses a liquid heater that is easy to install, including a base, a pot body mounted on the base, a fixing member adhered to the bottom of the pot body, a mounting hole provided in the middle of the fixing member, a heating plate installed in the mounting hole, and a support member located at the bottom of the heating plate. The support member is used to support the heating plate and is fixedly connected to the fixing member.

[0003] To better and more evenly conduct heat to the kettle body, a layer of thermally conductive silicone grease is usually coated between the bottom of the kettle body and the heating plate. However, in the above structure, there is no structure to seal the thermally conductive silicone grease layer between the bottom of the kettle body and the heating plate. This structure is prone to two safety issues: First, during the heating process, the silicone oil in the thermally conductive silicone grease will gradually evaporate outward, causing the thermally conductive silicone grease layer to dry and crack, which can easily cause the kettle body to crack due to uneven heating. Second, the thermally conductive silicone grease is prone to overflowing and falling into the wiring inside the base, causing creepage distance connection and potentially short circuits.

[0004] Therefore, there is an urgent need for a liquid heater with a closed structure to slow down the evaporation of silicone oil and prevent the thermal grease from overflowing around the perimeter. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a liquid heater with a closed structure.

[0006] The technical solution adopted by this utility model to solve the problem is: a liquid heater with a closed structure, including a pot body and a heating plate, wherein a thermally conductive silicone grease layer is disposed between the pot body and the heating plate, and an annular support is disposed at the bottom of the pot body, the annular support surrounding the outer periphery of the thermally conductive silicone grease layer; a snap-fit ​​plate is disposed at the top of the heating plate, the snap-fit ​​plate is adapted to the annular support, and a flexible part is disposed on the side of the snap-fit ​​plate, the snap-fit ​​plate being sealed to the annular support through the flexible part, forming a sealed cavity between the snap-fit ​​plate and the bottom of the pot body, and the thermally conductive silicone grease layer being located in the sealed cavity.

[0007] As a further improvement to the above technical solution, the card plate also includes a rigid part, which is integrally disposed on the top of the heating plate, and the rigid part is made of stainless steel or iron.

[0008] As a further improvement to the above technical solution, the flexible part is detachably connected to the rigid part, and the flexible part is made of silicone or rubber.

[0009] As a further improvement to the above technical solution, the diameter of the heating plate is smaller than the diameter of the snap-fit ​​plate, and the flexible part is spaced a certain distance from the heating plate.

[0010] As a further improvement to the above technical solution, the flexible part is annular, and an annular groove is provided on the inner side of the flexible part; the rigid part is bowl-shaped, and an extension edge is provided on the side of the rigid part; the flexible part abuts against the side wall of the rigid part, and the extension edge is engaged in the annular groove.

[0011] As a further improvement to the above technical solution, a boss is provided at the bottom of the pot body, and an annular recess is provided on the periphery of the boss. The annular bracket is fixedly connected to the annular recess; the snap-fit ​​plate is snapped into the bottom of the boss.

[0012] As a further improvement to the above technical solution, the outer side of the flexible part is provided with an inclined surface, the lower end of the inclined surface is inclined in a direction away from the central axis, and the snap-fit ​​plate is interference-fitted with the annular bracket through the inclined surface on the flexible part.

[0013] The beneficial effects of this utility model are as follows: This utility model sets an annular support at the bottom of the kettle body, sets a retaining plate at the top of the heating plate, sets a flexible part on the side of the retaining plate, and seals the retaining plate with the annular support through the flexible part. There is a certain gap between the retaining plate and the bottom of the kettle body to form a sealed cavity for accommodating the thermal grease layer, thereby slowing down the evaporation of silicone oil and preventing the thermal grease from overflowing around the edges. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is an exploded view of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0018] Figure 4 This is an exploded view of the structure between the flexible part, the rigid part, and the heating plate.

[0019] In the figure: 1-pot body, 11-protrusion, 12-annular recess, 2-annular bracket, 3-heating plate, 4-clamping plate, 41-flexible part, 411-inclined surface, 412-annular groove, 42-rigid part, 421-extension edge, 5-sealed cavity. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 4 A liquid heater with a closed structure includes a pot body 1 and a heating plate 3. A thermally conductive silicone grease layer (not shown) is disposed between the pot body 1 and the heating plate 3. An annular bracket 2 is fixedly connected to the bottom of the pot body 1, and the annular bracket 2 surrounds the outer periphery of the thermally conductive silicone grease layer. A retaining plate 4 is disposed on the top of the heating plate 3 (the retaining plate 4 is fixedly connected to the heating plate 3). The retaining plate 4 is adapted to the inner ring of the annular bracket 2. A flexible part 41 is disposed on the side of the retaining plate 4. The retaining plate 4 is sealed to the annular bracket 2 through the flexible part 41. A sealed cavity 5 is formed between the retaining plate 4 and the bottom of the pot body 1, and the thermally conductive silicone grease layer is located in the sealed cavity 5. By setting a retaining plate 4, the side of the retaining plate 4 is sealed to the annular bracket 2 through a flexible part 41, thereby forming a sealed cavity 5 (closed structure) between the retaining plate 4 and the bottom of the pot body 1 to accommodate the thermally conductive silicone grease layer, thereby slowing down the evaporation of silicone oil and preventing the thermally conductive silicone grease from overflowing around, thus improving the safety performance of the liquid heater.

[0025] In a preferred embodiment, the card plate 4 further includes a rigid part 42, which is integrally disposed on the top of the heating plate 3, and the rigid part 42 is made of stainless steel or iron.

[0026] In a preferred embodiment, the flexible part 41 is detachably connected to the rigid part 42, and the flexible part 41 is made of silicone or rubber, preferably high-temperature resistant silicone.

[0027] In a preferred embodiment, the diameter of the heating plate 3 is smaller than the diameter of the retaining plate 4, and the flexible part 41 is spaced a certain distance from the heating plate 3 to avoid direct contact between the flexible part 41 and the heating plate 3, thereby reducing the impact of high temperature on the flexible part 41.

[0028] In a preferred embodiment, the flexible part 41 is annular, and an annular groove 412 is provided on the inner side of the flexible part 41; the rigid part 42 is an inverted bowl shape, and an extension edge 421 is provided on the side of the rigid part 42; the flexible part 41 abuts against the side wall of the rigid part 42, and the extension edge 421 is engaged in the annular groove 412, thereby realizing the assembly of the flexible part 41 and the rigid part 42.

[0029] In a preferred embodiment, a boss 11 is provided at the center of the bottom of the kettle body 1, and an annular recess 12 is provided around the boss 11. The annular bracket 2 is bonded to the annular recess 12 by an adhesive; the snap-fit ​​plate 4 is snapped onto the bottom of the boss 11. In the transverse direction, the flexible part 41 is pressed between the rigid part 42 and the annular bracket 2; in the vertical direction, the flexible part 41 is partially pressed between the boss 11 and the rigid part 42, thereby forming a sealed cavity 5 between the rigid part 42 and the boss 11.

[0030] In a preferred embodiment, the flexible part 41 is provided with an inclined surface 411 on its outer side. The lower end of the inclined surface 411 is inclined away from the central axis. The snap-fit ​​plate 4 is inserted into the annular bracket 2 from bottom to top. The snap-fit ​​plate 4 is press-fitted with the annular bracket 2 through the inclined surface 411 to improve the sealing performance.

[0031] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A liquid heater with a closed structure, comprising a pot body (1) and a heating plate (3), wherein a thermally conductive silicone grease layer is disposed between the pot body (1) and the heating plate (3), characterized in that: The bottom of the pot body (1) is provided with an annular support (2), which surrounds the outer periphery of the thermally conductive silicone grease layer; The top of the heating plate (3) is provided with a retaining plate (4), which is adapted to the annular bracket (2). A flexible part (41) is provided on the side of the retaining plate (4). The retaining plate (4) is sealed to the annular bracket (2) through the flexible part (41). A sealed cavity (5) is formed between the retaining plate (4) and the bottom of the pot body (1). The thermally conductive silicone grease layer is located in the sealed cavity (5).

2. A liquid heater with a closed structure as described in claim 1, characterized in that: The card plate (4) also includes a rigid part (42), which is integrally disposed on the top of the heating plate (3). The rigid part (42) is made of stainless steel or iron.

3. A liquid heater with a closed structure as described in claim 2, characterized in that: The flexible part (41) is detachably connected to the rigid part (42), and the flexible part (41) is made of silicone or rubber.

4. A liquid heater with a closed structure as described in claim 3, characterized in that: The diameter of the heating plate (3) is smaller than the diameter of the snap-fit ​​plate (4), and the flexible part (41) is spaced a certain distance from the heating plate (3).

5. A liquid heater with a closed structure as described in claim 3, characterized in that: The flexible part (41) is annular, and an annular groove (412) is provided on the inner side of the flexible part (41); the rigid part (42) is bowl-shaped, and an extension edge (421) is provided on the side of the rigid part (42); the flexible part (41) abuts against the side wall of the rigid part (42), and the extension edge (421) is engaged in the annular groove (412).

6. A liquid heater with a closed structure as described in claim 5, characterized in that: The bottom of the pot body (1) is provided with a boss (11), and an annular recess (12) is provided on the periphery of the boss (11). The annular bracket (2) is fixedly connected to the annular recess (12); the snap-fit ​​plate (4) is snapped under the boss (11).

7. A liquid heater with a closed structure as described in claim 1, characterized in that: An inclined surface (411) is provided on the outer side of the flexible part (41), and the lower end of the inclined surface (411) is inclined away from the central axis. The snap-fit ​​plate (4) is interference-fitted with the annular bracket (2) through the inclined surface (411) on the flexible part (41).

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