Liftable whole house heating electric return air heating table

Abstract

The utility model discloses a liftable whole house heating electric return air heating table. The heating table includes bottom plate, desktop and four liftable supporting legs connected with the four corners of the bottom plate and the desktop, and the middle part of the desktop is provided with an electric return air stove. Its characterized in that the first anti-scald cover is fixed below the desktop, the second anti-scald cover is fixed at the corresponding position of the bottom plate, the first anti-scald cover is inserted into the second anti-scald cover and can produce relative displacement along with the lifting of the desktop, and a dynamic closed protection space is constructed. The space internally contains the power line, and the surfaces of the two anti-scald covers are provided with air holes; the inner bottom of the second anti-scald cover is provided with a fan for blowing air downward, and the air holes form forced return air circulation. The safety isolation and pipeline hiding during the lifting are realized through the telescopic anti-scald structure, and the hot flow is guided to diffuse from bottom to top through the downward blowing design, so that the safety and comfort of the whole house heating are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of electric heating table technology, specifically a height-adjustable whole-house heating table with electric return air heating. Background Technology

[0002] Traditional electric heating tables often separate their heating and cooking functions. Examples include dual-core heating tables with emergency functions, graphene rotating magnetic heating tables, and dual-core emergency lifting heating tables; these tables only provide heating. Some heating tables on the market also include cooking functions, but these often use induction cookers or microwave ovens. These appliances only cook and do not provide heating. This necessitates purchasing and installing two sets of equipment, increasing costs. Utility Model Content

[0003] The purpose of this invention is to provide a height-adjustable whole-house heating electric return air heating table to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A height-adjustable whole-house heating electric return air heating table is provided, including a base plate, four height-adjustable support legs, and a tabletop. The lower parts of the four height-adjustable support legs are fixedly connected to the four corners of the base plate, and the upper parts of the four height-adjustable support legs are fixedly connected to the four corners of the tabletop. The extension and retraction of the support legs drive the tabletop to rise and fall. An electric return air furnace is provided in the center of the tabletop, and the furnace plate of the electric return air furnace is located in the center of the tabletop. A first anti-scalding cover is provided around the electric return air furnace under the tabletop. A second anti-scalding cover is fixedly connected to the base plate directly below the first anti-scalding cover. The first anti-scalding cover and the second anti-scalding cover are matched so that the first anti-scalding cover can be inserted into the second anti-scalding cover and move up and down relative to the second anti-scalding cover.

[0005] Furthermore, the power cord of the electric return air furnace is located within the space enclosed by the first and second anti-scalding covers and is connected to the power interface on the base plate.

[0006] Furthermore, the first and second heat shields have ventilation holes.

[0007] Furthermore, a fan is provided on the upper surface of the bottom plate inside the second heat shield. The fan's shaft is coaxial with the central axis of the electric return air furnace, the fan blows air downwards, and the fan is connected to a power source.

[0008] Furthermore, at least some of the vents on the second heat shield are located below the plane of the fan.

[0009] Furthermore, the liftable outrigger is equipped with a heating element, which is connected to a power source.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes the coaxial connection of a first and a second anti-scalding cover to construct a protective cavity that dynamically changes with the height of the desktop while remaining physically sealed. This structure not only effectively isolates the high-temperature electric return air furnace from the user's limbs during any lifting stroke, eliminating the risk of burns, but also provides a dedicated retractable storage space for the power cord, eliminating the risk of tangling caused by exposed cables. More importantly, this sealed cavity and the internal thermal circulation system produce a significant synergistic effect: the anti-scalding cover is not only a safety barrier but also a directional airflow duct. Combined with the downward forced convection of the bottom fan, it overcomes the physical property of hot air rising naturally, forcing heat to diffuse through the lower ventilation holes and near the ground, forming a unique "electric return air" thermal circulation path. This mechanism ensures that the desktop does not overheat while achieving uniform heat distribution starting from the feet, effectively improving the comfort and thermal efficiency of whole-house heating. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a perspective view of the first anti-scalding cover of this utility model; Figure 4 This is a perspective view of the first and second anti-scalding covers of this utility model assembled together. Detailed Implementation

[0012] The technical solutions of the present invention 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 invention, and not all embodiments.

[0013] Example 1: Foundation Lifting and Protection Structure like Figures 1-4 As shown, this utility model provides a height-adjustable whole-house heating electric return air heating table, which mainly consists of a support and adjustment system, a heating system and a safety protection system.

[0014] The support and adjustment system includes a base plate 1, a tabletop 3, and four height-adjustable support legs 2 connected between the two. The four height-adjustable support legs 2 are arranged in a rectangle, with their lower ends fixed to the four corners of the base plate 1 by bolts or welding, and their upper ends fixed to the four corners of the tabletop 3. In this embodiment, the height-adjustable support legs 2 preferably adopt an electric push rod assembly, and the four support legs are controlled to extend and retract synchronously by an external controller, thereby driving the tabletop 3 to rise and fall smoothly in the vertical direction relative to the base plate 1, so as to adapt to different usage scenarios such as a high dining table or a low coffee table.

[0015] The heating system is an electric return air furnace 4 located in the middle of the tabletop 3. The heating plate of the electric return air furnace 4 is installed at the opening in the middle of the tabletop 3, and the upper surface of the heating plate is flush with or slightly higher than the tabletop 3, so as to facilitate the placement of cookware for cooking or direct heating.

[0016] The aforementioned safety protection system is designed to address the risk of burns and the problem of messy wiring caused by the exposed furnace body during the lifting and lowering of the tabletop 3. The specific structure is as follows: a first anti-scalding cover 6 (upper cover) is fixedly installed around the furnace body of the electric return air furnace 4 on the lower surface of the tabletop 3; a second anti-scalding cover 5 (lower cover) is fixedly installed on the upper surface of the base plate 1 directly below the first anti-scalding cover 6.

[0017] Both the first heat shield 6 and the second heat shield 5 are hollow cylindrical structures (which can be round or square), and their dimensions are matched to form a sliding interlocking fit. In this embodiment, the inner diameter of the first heat shield 6 is slightly larger than the outer diameter of the second heat shield 5, so that the first heat shield 6 is fitted over the second heat shield 5.

[0018] When the desktop 3 descends, the first heat shield 6 moves down with the desktop 3 and covers the second heat shield 5 as it moves downwards. When the desktop 3 rises, the first heat shield 6 moves upward but never detaches from the second heat shield 5. Through this telescopic sleeve structure, regardless of the height of the desktop 3, the high-temperature area below the electric return air furnace 4 is always enclosed in the internal space formed by the two heat shields, effectively preventing users from accidentally touching and burning their legs.

[0019] Furthermore, to solve the wiring problem of the height-adjustable table, the power cord of the electric return air oven 4 is directly arranged within the enclosed space formed by the first heat shield 6 and the second heat shield 5. One end of the power cord is connected to the oven body, and the other end passes downward through the interior of the second heat shield 5 to connect to the power interface (such as a conductive slip ring or junction box) located on the base plate 1. This internal wiring design prevents the power cord from swaying, tangling, or being pulled by external forces as the tabletop 3 rises and falls, significantly improving safety and aesthetics.

[0020] The adjustable support leg 2 is equipped with a heating element, which is connected to a power source. By cooperating with the electric return air furnace 4, the adjustable support leg 2 achieves three-dimensional heating, resulting in better heating performance and a more comfortable experience.

[0021] Example 2: Hot Air Circulation Enhancement System Based on Example 1, in order to further improve heating efficiency and achieve the effects of "whole house heating" and "warm feet", this example has optimized the design of the anti-scalding cover and internal airflow structure.

[0022] like Figure 3 As shown, the first heat shield 6 and the second heat shield 5 both have several ventilation holes on their side walls. These ventilation holes not only serve to dissipate heat but also form the air duct outlets for hot air circulation.

[0023] To actively drive the hot airflow, a fan 7 is installed on the upper surface of the base plate 1 inside the second heat shield 5. The fan 7 is located at the bottom of the cavity enclosed by the heat shield, and the shaft of the fan 7 is coaxial with the central axis of the electric return air furnace 4 above. The fan blades of the fan 7 are designed so that the airflow direction is downward (i.e., towards the base plate 1). The fan 7 is connected to the power supply through internal wiring and can be turned on synchronously with the electric return air furnace 4 or controlled independently.

[0024] The key improvement lies in the distribution of the ventilation holes: There are at least a number of ventilation holes on the side wall of the second heat shield 5 (preferably all or most of the ventilation holes are located below the plane where the fan 7 is located, i.e., near the base plate 1).

[0025] The working principle and hot airflow path of this structure are as follows: When the electric return air furnace 4 is working, in addition to transferring heat to the upper heating plate, its furnace body also emits a large amount of radiant heat within the cavity of the anti-scalding cover, heating the air inside the cavity. Activating the bottom fan 7 generates a downward suction force, powerfully pulling the hot air accumulated in the upper part of the cavity downwards. The hot air compressed downwards by fan 7, due to the obstruction of the base plate 1, can only be ejected outwards through the vent at the bottom of the second anti-scalding cover 5. The hot air ejected from near the base plate 1 directly acts on the user's foot area, achieving an excellent "foot warming" effect. Simultaneously, the hot air diffuses along the ground and naturally rises, forming a thermodynamically sound whole-house circulation (electric return air), greatly improving the space's heating speed and comfort.

[0026] If the vent is only located above the fan 7, the air blown out by the fan 7 will form a dead loop or vortex inside the cover, making it difficult to effectively output heat. Only by setting the vent below the plane of the fan 7, as described in this embodiment, can the hot air be effectively "squeezed" out of the anti-scalding cover by wind pressure, thus achieving the purpose of whole-house heating.

[0027] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

[0028] It should be noted that the above embodiments are only used to illustrate one feasible solution of this utility model and should not be regarded as a limitation on the protection scope of this utility model. Without departing from the spirit of this utility model, those skilled in the art can make substitutions or equivalent modifications to the above structural forms, and all such modifications should be regarded as falling within the protection scope of this utility model.

Claims

1. A height-adjustable whole-house heating electric return air heating table, comprising a base plate (1), four height-adjustable support legs (2), and a tabletop (3), wherein the lower parts of the four height-adjustable support legs (2) are fixedly connected to the four corners of the base plate (1), and the upper parts of the four height-adjustable support legs (2) are fixedly connected to the four corners of the tabletop (3), and the extension and retraction of the support legs drives the tabletop (3) to rise and fall, characterized in that, The tabletop (3) is provided with an electric return air furnace (4) in the middle. The furnace plate of the electric return air furnace (4) is located in the middle of the tabletop (3). The electric return air furnace (4) at the bottom of the tabletop (3) is provided with a first anti-scalding cover (6) around its perimeter. A second anti-scalding cover (5) is fixedly connected to the bottom plate (1) directly below the first anti-scalding cover (6). The first anti-scalding cover (6) and the second anti-scalding cover (5) are matched so that the first anti-scalding cover (6) can be inserted into the second anti-scalding cover (5) and move up and down relative to the second anti-scalding cover (5).

2. The height-adjustable whole-house heating electric return air heating table according to claim 1, characterized in that, The power cord of the electric return air furnace (4) is located in the space enclosed by the first anti-scalding cover (6) and the second anti-scalding cover (5), and is connected to the power interface of the base plate (1).

3. The height-adjustable whole-house heating electric return air heating table according to claim 1, characterized in that, The first heat shield (6) and the second heat shield (5) have ventilation holes.

4. The height-adjustable whole-house heating electric return air heating table according to claim 3, characterized in that, The bottom plate (1) inside the second heat shield (5) is provided with a fan (7). The rotating shaft of the fan (7) is coaxial with the central axis of the electric return air furnace (4). The air blowing direction of the fan (7) is downward. The fan (7) is connected to the power supply.

5. The height-adjustable whole-house heating electric return air heating table according to claim 4, characterized in that, At least some of the vents on the second heat shield (5) are located below the plane of the fan (7).

6. The height-adjustable whole-house heating electric return air heating table according to claim 4, characterized in that, The liftable support leg (2) is equipped with a heating element, which is connected to a power source.

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