Double-heating electric air return furnace
The electric return air oven, with its dual heating structure and rotating cleaning mechanism, solves the problems of single-function heating and cooking devices, inconvenient cleaning, and poor heat dissipation, achieving efficient heat energy utilization and a safe, multi-functional user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 张萧尹
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-15
AI Technical Summary
Existing heating and cooking devices are limited in function, have low space utilization, uneven heating, are difficult to clean, have poor heat dissipation, pose safety hazards, have low thermal energy utilization efficiency, and cannot meet different usage needs.
The electric return air furnace adopts a dual heating structure, a rotating cleaning mechanism, a heat reflection structure, and an air convection cooling structure, enabling independent adjustment of the upper and lower heating elements. The rotating upper heating plate facilitates cleaning, and the combination of radiation and convection heat dissipation improves thermal energy utilization and operational safety.
It achieves effective separation and synergy between heating and cooking functions, enhances the equipment's versatility and efficiency, extends its service life, and improves thermal energy utilization and user experience.
Smart Images
Figure CN224246250U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multifunctional electric heating device with dual heat sources and a rotating structure, specifically an improvement of an electric return air stove suitable for both heating and cooking. Background Technology
[0002] Existing heating and cooking appliances are mostly separate structures. For example, traditional heating tables only have heating plates or heating wires for heating, while household induction cookers, ceramic cooktops, and infrared stoves are only for cooking. These devices have limited functionality and low space utilization, and cannot simultaneously meet the diverse needs of "heating + cooking" in various home or commercial settings.
[0003] Traditional electric heating products suffer from several major problems: using a single heating element for both heating and cooking can lead to uneven heating, making it difficult to balance efficiency and safety; after prolonged operation, the surface of the heating element accumulates oil, dust, or food residue, making internal cleaning difficult and severely impacting the user experience, as well as the overall product lifespan; some devices experience poor heat dissipation during continuous operation, leading to overheating and damage to the control circuitry, posing safety hazards; the heating element has low thermal efficiency, limited heat radiation, and significant energy waste; and most products do not support independent adjustment of the upper and lower heating sources or multi-stage power control, failing to adapt to diverse usage needs. Utility Model Content
[0004] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a dual-heating electric return air oven. It provides an electric return air oven with a dual heating structure, a rotating cleaning mechanism, a heat reflection structure, and an air convection cooling structure. Its structure is reasonably designed, has good heating and cooking functions, and is easy to clean and dissipate heat.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes an upper platform 1, a furnace cover plate 2, an upper heating plate 3, an upper furnace ring 4, a lower furnace ring 5, a furnace partition 6, a lower furnace outer ring 7, a lower heating plate 8, an upper heating plate outer ring 9, and a base 10. A circular hole is provided in the center of the upper platform 1, and the furnace cover plate 2 is located on the lower side inside the circular hole. The outer ring 9 of the upper heating plate is located on the outer side of the furnace cover plate 2, and the upper heating plate 3 is located at the lower part of the furnace cover plate 2. The upper heating plate 3 is set inside the upper furnace ring 4. The lower furnace ring 5 is set at the bottom of the upper furnace ring 4. A furnace partition 6 is set between the upper furnace ring 4 and the lower furnace ring 5. The lower heating plate 8 is set at the bottom of the inner side of the lower furnace ring 5. Both the lower furnace ring 5 and the lower heating plate 8 are set on the base 10. The outer furnace ring 7 is sleeved on the outer side of the upper furnace ring 4 and the lower furnace ring 5. The top of the outer furnace ring 7 is connected to the outer ring 9 of the upper heating plate. The bottom of the outer furnace ring 7 is snapped onto the base 10.
[0006] The outer edge of the outer ring 9 of the upper heating plate is provided with several mounting brackets 91. The mounting brackets 91 are provided with screw holes and are fixed to the upper table surface 1 through the screw holes.
[0007] The upper furnace ring 4 is cylindrical, and its side wall is provided with wiring holes 42 and arc-shaped wiring grooves 43. The inlet and outlet electrical conduits of the upper heating plate 3 pass through the wiring holes 42 and arc-shaped wiring grooves 43, respectively. The upper heating plate 3 can be driven manually or electrically, and can be set horizontally or vertically before and after use. When the upper heating plate 3 is set vertically, the interior of the furnace is fully exposed, making it easier for the user to clean the interior.
[0008] The furnace baffle 6 has a concave center and a convex lower surface. The furnace baffle 6 can catch water, oil, and food residue that falls during cooking. When the upper heating plate 3 is in a vertical position, items falling onto the furnace baffle 6 can be cleaned directly from the top. The convex lower surface of the furnace baffle 6 utilizes its spherical reflective surface to block and reflect heat generated by the lower heating plate 8, improving the energy efficiency of the lower heating element and simultaneously increasing heating efficiency and heat conversion efficiency.
[0009] The upper surface of the base 10 is provided with multiple through holes 101, and a cooling fan 102 is provided inside the base 10. The through holes 101 and the cooling fan 102 can enhance the air circulation of the entire bottom, enhance the heat dissipation effect, and improve the heat dissipation effect of the lower heating plate 8.
[0010] The outer wall of the lower side of the outer ring 7 of the furnace chamber is provided with uniformly spaced perforations 71. The perforations 71 can better radiate and release the heat from the lower heating plate 8.
[0011] The working principle of this utility model is as follows: The upper heating plate 3 is a dry-burning tube structure with an adjustable power between 800W and 3000W. When the user starts the cooking function, the upper heating plate 3 is heated in a controlled manner, releasing heat that is conducted to the protective cover plate area to form a high-temperature heating space. Food can be placed directly on the upper grill or pot for grilling, frying, or other operations. The upper heating plate 3 can be driven to a vertical or horizontal state by manual or electric means. In the vertical state, the inside of the furnace can be completely exposed, making it easy for the user to clean. Oil stains and food residues splashed during cooking are collected by the concave area of the furnace partition plate 6, preventing contamination of the lower heating area and facilitating cleaning.
[0012] The lower heating plate 8 has a ring or M-shaped dry-burning tube structure, with a large radiation area and the power can be adjusted between 1000W and 5500W. After the heating function is turned on, the lower heating plate 8 heats up quickly, the heat radiates upwards, and is reflected and diffused to the perimeter of the table and the legs of the human body through the convex reflector, so as to achieve uniform heating.
[0013] The lower surface of the furnace baffle 6 is a spherical reflector. Through the principle of heat reflection, the heat radiation released by the lower heating plate is reflected to the surrounding area, improving heat utilization and reducing heat conduction downward to the electrical control area.
[0014] Traditional electric heating tables use fans to rapidly dissipate heat. However, this new invention utilizes a principle that allows for convection circulation between the hot air inside and the cold air outside. The fan draws in cold air and blows it inward, cooling the circuit board while simultaneously allowing the hot air inside the furnace to rapidly rise and spread outward. This heat exchange and convection with the cold air entering from the bottom within the furnace chamber rapidly raises the temperature of the enclosed room, transforming the previous reliance solely on radiation into a combination of radiation and convection, significantly improving heat dissipation.
[0015] By adopting the above technical solution, this utility model, through its upper and lower dual heating element structure, effectively separates and coordinates cooking and heating functions, significantly improving the equipment's multifunctionality and efficiency. The rotatable and foldable design of the upper heating plate makes cleaning the interior of the furnace convenient, solving the problem of difficult cleaning in traditional equipment and extending its service life. The concave-convex heat insulation plate in the middle not only catches falling oil and residue from above, preventing contamination of the lower heating plate, but also reflects heat energy through its convex surface, enhancing the heat radiation efficiency of the lower heating zone, improving heating effect, and reducing heat waste. A fan and air channel at the bottom form an efficient hot air circulation path, effectively reducing the temperature of the electronic control components and accelerating the indoor heating rate, thus improving heat exchange efficiency. The overall structure is compact, highly integrated, flexible and safe to operate, possesses a high energy efficiency ratio and user experience, and has good practical and promotional value. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0019] Figure 3 yes Figure 2 Another viewpoint;
[0020] Figure 4 yes Figure 1 A schematic diagram of the decomposed structure;
[0021] Figure 5 An exploded structural diagram of the upper furnace ring 4 parts in this utility model;
[0022] Figure 6 yes Figure 5 A schematic diagram of the rotating state of the upper heating plate 3.
[0023] Explanation of reference numerals in the attached drawings: 1. Upper platform; 2. Furnace cover plate; 3. Upper heating plate; 4. Lower furnace ring; 5. Furnace ring; 6. Furnace partition; 7. Lower furnace outer ring; 8. Lower heating plate; 9. Upper heating plate outer ring; 10. Base; 91. Mounting bracket; 42. Wiring hole; 43. Arc-shaped wiring groove; 101. Through hole; 102. Cooling fan; 71. Hole. Detailed Implementation
[0024] See Figure 1-6 As shown, the technical solution adopted in this specific embodiment is as follows: it includes an upper platform 1, a furnace cover plate 2, an upper heating plate 3, an upper furnace ring 4, a lower furnace ring 5, a furnace partition 6, a lower furnace outer ring 7, a lower heating plate 8, an upper heating plate outer ring 9, and a base 10. A circular hole is provided in the center of the upper platform 1, and the furnace cover plate 2 is provided on the lower side inside the circular hole. The outer ring of the upper heating plate 9 is provided on the outer side of the furnace cover plate 2, and the upper heating plate 3 is provided at the lower part of the furnace cover plate 2. A heating plate 3 is disposed inside an upper furnace ring 4. A lower furnace ring 5 is disposed below the upper furnace ring 4. A furnace partition 6 is disposed between the upper furnace ring 4 and the lower furnace ring 5. A lower heating plate 8 is disposed at the bottom inner side of the lower furnace ring 5. Both the lower furnace ring 5 and the lower heating plate 8 are disposed on a base 10. An outer furnace ring 7 is fitted around the outer sides of the upper furnace ring 4 and the lower furnace ring 5. The top of the outer furnace ring 7 is abutted against the outer ring 9 of the upper heating plate, and the bottom of the outer furnace ring 7 is snapped onto the base 10. Several mounting brackets 91 are disposed on the outer edge of the outer ring 9 of the upper heating plate. The mounting brackets 91 are provided with screw holes and are fixed to the upper platform 1 through the screw holes. The upper furnace ring 4 is cylindrical. A wiring hole 42 and an arc-shaped wiring groove 43 are provided on the side wall of the upper furnace ring 4. The inlet and outlet electrical conduits of the upper heating plate 3 pass through the wiring hole 42 and the arc-shaped wiring groove 43, respectively. The furnace baffle 6 has a concave surface in the middle and a convex surface on its lower surface. The upper surface of the base 10 has multiple through holes 101, and a cooling fan 102 is installed inside the base 10. The lower outer wall of the furnace outer ring 7 has uniformly spaced perforated holes 71.
[0025] In this specific embodiment, the upper heating plate 3 is a dry-burning tube structure with an adjustable power between 800W and 3000W. When the user starts the cooking function, the upper heating plate 3 is heated in a controlled manner, releasing heat that is conducted to the protective cover area to form a high-temperature heating space. Food can be placed directly on the upper grill or pot for grilling, frying, or other operations. The upper heating plate 3 can be driven to a vertical or horizontal state by manual or electric means. In the vertical state, the inside of the furnace can be completely exposed, making it easy for the user to clean. Oil stains and food residues splashed during cooking are collected by the concave area of the furnace partition 6, preventing contamination of the lower heating area and facilitating cleaning.
[0026] The lower heating plate 8 has a ring or M-shaped dry-burning tube structure, with a large radiation area and the power can be adjusted between 1000W and 5500W. After the heating function is turned on, the lower heating plate 8 heats up quickly, the heat radiates upwards, and is reflected and diffused to the perimeter of the table and the legs of the human body through the convex reflector, so as to achieve uniform heating.
[0027] The lower surface of the furnace baffle 6 is a spherical reflector. Through the principle of heat reflection, the heat radiation released by the lower heating plate is reflected to the surrounding area, improving heat utilization and reducing heat conduction downward to the electrical control area.
[0028] Traditional electric heating tables use electric fans to rapidly dissipate heat. However, this invention utilizes a principle that allows for convection circulation between the hot air inside and the cold air outside. The fan draws in cold air and blows it inward, cooling the circuit board while simultaneously allowing the hot air inside the furnace to rapidly rise and spread outward. This heat exchange and convection with the cold air entering from the bottom within the furnace chamber rapidly raises the temperature of the enclosed room, transforming heat dissipation from solely radiant heat to a combination of radiation and convection, significantly improving heat diffusion. This working principle is similar to that of the Guizhou return air furnace.
[0029] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A dual-heating electric return air furnace, characterized in that: It includes an upper platform (1), a furnace cover plate (2), an upper heating plate (3), an upper furnace ring (4), a lower furnace ring (5), a furnace partition plate (6), a lower furnace outer ring (7), a lower heating plate (8), an upper heating plate outer ring (9), and a base (10). A circular hole is provided in the center of the upper platform (1), and a furnace cover plate (2) is provided on the lower side inside the circular hole. An upper heating plate outer ring (9) is provided on the outer side of the furnace cover plate (2), and an upper heating plate (3) is provided at the lower part of the furnace cover plate (2). The upper heating plate (3) is located on the upper furnace ring (4). 4) Inside, a lower furnace ring (5) is provided at the lower part of the upper furnace ring (4), a furnace partition (6) is provided between the upper furnace ring (4) and the lower furnace ring (5), a lower heating plate (8) is provided at the bottom of the inner side of the lower furnace ring (5), and both the lower furnace ring (5) and the lower heating plate (8) are provided on the base (10); an outer furnace ring (7) is sleeved on the outer side of the upper furnace ring (4) and the lower furnace ring (5), the top of the outer furnace ring (7) is connected to the outer ring of the upper heating plate (9), and the bottom of the outer furnace ring (7) is snapped onto the base (10).
2. The dual-heating electric return air furnace according to claim 1, characterized in that: The outer edge of the outer ring (9) of the upper heating plate is provided with several mounting brackets (91), and the mounting brackets (91) are provided with screw holes. The mounting brackets (91) are fixed to the upper table surface (1) through the screw holes.
3. The dual-heating electric return air furnace according to claim 1, characterized in that: The upper furnace ring (4) is cylindrical. The side wall of the upper furnace ring (4) is provided with a circuit hole (42) and an arc-shaped circuit groove (43). The electric pipes of the upper heating plate (3) pass through the circuit hole (42) and the arc-shaped circuit groove (43) respectively.
4. The dual-heating electric return air furnace according to claim 1, characterized in that: The middle part of the furnace partition (6) is concave, and the lower surface of the furnace partition (6) is convex.
5. The dual-heating electric return air furnace according to claim 1, characterized in that: The upper surface of the base (10) is provided with a plurality of through holes (101), and a cooling fan (102) is provided inside the base (10).
6. The dual-heating electric return air furnace according to claim 1, characterized in that: The outer wall of the furnace outer ring (7) is provided with uniform perforations (71).