Composite parabolic cone reflective heat-conducting energy-saving cover

Abstract

A composite parabolic cone reflective heat-conductive energy-saving cover, comprising a composite parabolic cone, a heating plate and a heat-conductive energy-saving cover support frame. The composite parabolic cone is composed of a parabolic cone reflective inner wall, a vacuum sealing layer, a parabolic cone reflective outer wall and a composite insulation material coating. The parabolic cone reflective inner wall and outer wall are both thin metal walls with smooth surfaces and are made into a parabolic cone shape. The inner surface of the inner wall and the inner surface of the outer wall are plated with a fire-resistant and heat-resistant high-reflective film. There is a vacuum sealing layer between them. The composite insulation material coating tightly wraps the outer side of the parabolic cone reflective outer wall, and the heating plate is positioned at the focal position of the parabolic cone reflective inner wall. The present invention reversely uses the parabolic focusing principle and rationalizes the new design of the heat-conductive energy-saving cover insulation structure, so that the heat energy released by the heating plate is transferred to the cooker above with high conversion efficiency. The design is novel and the structure is simple, which is suitable for promotion and use in heating stove products and residents' production and life.

Description

Technical Field

[0001] The invention relates to the technical field of energy-saving covers, in particular to a composite parabolic cone-shaped reflective heat-conducting energy-saving cover used in conjunction with a heating stove. Background Art

[0002] Heating stoves such as electric stoves and gas stoves have been widely used in the production and life of Chinese residents. Heating stoves mainly use heat radiation, and the heat heats the upper cooker from bottom to top. Usually, the heating stove adopts an atmospheric open type, and the heat heats the cooker in the upward direction, but some heat is directly lost after radiation leakage from the gap between the heating stove and the bottom of the cooker, which ultimately greatly reduces the efficiency of the heating stove. At present, the thermal efficiency of gas heating stoves is about 55%, and the thermal efficiency of electric heating stoves is about 80%. In order to further save energy and improve thermal efficiency, a variety of energy-saving covers or energy-saving devices have been developed for use with heating stoves, but most of them use the overall or partial concave arc reflection method to reflect part of the heat leaked in the gap to the bottom of the cooker. Although the above-mentioned energy-saving covers or energy-saving devices have a certain effect of improving the thermal efficiency of the heating stove, none of them have been quantitatively and precisely designed according to the principle of heat energy transmission, and do not have the ability to save more heat from the heating stove, so it is difficult to achieve a better effect of improving energy utilization. Summary of the invention

[0003] The technology of the present invention solves the problem that the energy-saving cover used with the heating stove in the prior art is difficult to achieve higher energy utilization efficiency, which helps to save more energy and achieve higher energy utilization. Based on the heat energy transmission method and the reverse parabola focusing principle, the present invention provides a quantitatively precisely designed composite parabolic cone reflective heat-conductive energy-saving cover, which can be matched with electric stoves, gas stoves and other heating stoves to better serve the heating stove products and the production and life of residents. At the same time, the quantitative design of the present invention can also be widely used in heat dissipation or heat conduction related fields.

[0004] The technical solution of the present invention is as follows:

[0005] A composite parabolic cone reflective heat-conducting energy-saving cover, characterized in that it comprises a composite parabolic cone, a heating plate and a heat-conducting energy-saving cover support frame;

[0006] The composite parabolic cone is composed of a parabolic cone reflective inner wall, a vacuum sealing layer, a parabolic cone reflective outer wall and a composite insulation material coating. The parabolic cone reflective inner wall and the parabolic cone reflective outer wall are both made of smooth metal thin walls and are made into a parabolic cone shape. The inner surfaces of the inner wall and the outer wall are plated with fire-resistant and heat-resistant high-reflective films. There is a vacuum sealing layer between the parabolic cone reflective inner wall and the parabolic cone reflective outer wall. A vacuum state is maintained in the vacuum sealing layer. The composite insulation material coating tightly wraps the parabolic cone reflective outer wall.

[0007] The left and right sides of any cross section of the parabolic cone reflective inner wall along the vertical direction are both parabolas, and the tangent at the edge exit is parallel to the vertical direction to ensure that the maximum output aperture is obtained. The edge of the heating plate is positioned at the focus of the compound parabolic cone, so that there is a corresponding relationship between the maximum output aperture and the heating plate with the maximum divergence angle, and the heat emitted by the heating plate is limited within the output aperture of the compound parabolic cone reflective heat-conductive energy-saving cover. The heat at the edge of the heating plate is reflected by the parabolic cone reflective inner wall and uniformly heats the upper cooker in a direction parallel to the optical axis of the parabolic cone.

[0008] The composite parabolic cone reflective heat-conductive energy-saving cover can be matched with electric stoves, gas stoves and other heating stoves. When the bottom heating plate of the composite parabolic cone reflective heat-conductive energy-saving cover is an electric heating plate, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has no hollow grid structure. When the bottom heating plate of the composite parabolic cone reflective heat-conductive energy-saving cover is gas-fired, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has a hollow grid, which is conducive to air entering from the bottom to assist combustion. The heat-conductive energy-saving cover support frame firmly supports the composite parabolic cone reflective heat-conductive energy-saving cover, and the heating guide passes through the heat-conductive energy-saving cover support frame.

[0009] Preferably, in the production and life of residents, the heating plates and cooking utensils in the heating stoves are usually round objects, the heating plates are mainly in the shape of discs, and the cooking utensils are mostly cylindrical or inverted bamboo hat shapes. Although the specific specifications of products from different manufacturers are not the same, the manufacturers of the above two commodities all provide definite spatial dimensions and shapes. The present invention can be based on the specific requirements of the output apertures of the heating plate and the composite parabolic cone reflective heat-conductive energy-saving cover, and reversely use the parabolic focusing principle, that is, the heating plate is positioned at the focus of the parabola, and there is a corresponding relationship between the output aperture of the composite parabolic cone reflective heat-conductive energy-saving cover and the heating plate with the maximum exit angle. The specific design of the parabolic cone reflective inner wall parabola is obtained and completed through strict calculation, which is also the basic basis for the quantitative precision design of the present invention.

[0010] Preferably, the composite parabolic cone reflective heat-conductive energy-saving cover adopts both a vacuum sealing layer and a composite insulation material coating, thus having better energy-saving effect and efficiency.

[0011] Principle of the present invention:

[0012] When electric stoves or gas stoves are powered on or burning, the heat radiates to the cookware above and radiates to the surrounding area. Heat waves are material waves with similar characteristics to electromagnetic waves, but the transmission direction is uncertain and radiates in all directions. The goal of quantitative precision design of heat-conducting energy-saving covers is to achieve the transmission of heat waves in a consistent direction after reflection by designing specific reflective surfaces.

[0013] Assuming the heating plate diameter is 2a and the cooker heating diameter is 2b:

[0014] The mathematical expression of a parabola is as follows:

[0015] x 2 =2Py (1)

[0016] The distance between the focus f of the parabola and the vertex of the parabola is P / 2. Light waves parallel to the parabola's symmetry axis must pass through the focus after reflection; conversely, light waves emitted at the focus of the parabola must be emitted parallel to the parabola's symmetry axis after reflection by the parabola. According to the design objectives of the composite parabolic cone reflective heat-conducting energy-saving cover, such as Figure 2 As shown, the parabola is divided and rotated to appropriate angles to construct the energy-saving cover with the central axis A o Symmetrical P AL and P AR Two parts, and satisfy P AL and P AR The output terminal O L and O R The tangent direction is parallel to the vertical direction, P AL and P AR The bottom end of S L and S R The tangent direction is parallel to the horizontal direction and the axisymmetric parabola P AL and P AR The focus of L and f R The distance from the vertex of the parabola is P / 2, f R The light wave emitted from the focal point is parallel to P after reflection. AR Axis of symmetry A R Emitting to the third quadrant, f L The light wave emitted from the focal point is parallel to P after reflection. AL Axis of symmetry A L Emitted to the first quadrant. L and S R The spacing can be determined according to the needs, and the bottom can be closed or hollowed out according to the type of heating body (such as electric heating or gas), which is more conducive to the energy-saving cover to assist heating and combustion. L and O R The spacing corresponds to the diameter of the heating port of the cooker, that is, the length is 2b. L and f R The spacing matches the diameter of the heating plate, that is, the length is 2a.

[0017] The heating plate is usually in the shape of a disk, with the edge of the disk located at the focus of the parabola, and the heat radiated from the edge of the heating plate is reflected along the axis of the parabola to the upper cooking utensils. Figure 3 As shown in the figure, the radiant heat inside the heating plate can directly heat the cooker above or be reflected by the fire-resistant and heat-resistant high-reflective film inside the parabola and then limited to the output end O of the energy-saving cover. L and OR Between, appropriately select the heating plate to the energy-saving cover output end O L and O R The vertical working distance L, the maximum divergence angle of heat transfer is 2θ max It can be expressed as:

[0018] θ max =arctan[(a+b) / L] (2)

[0019] According to the diameter and shape of the heating plate and the heating cooker provided by the manufacturer, that is, after a and b have determined values, the present invention can appropriately select the heating plate to the output end O of the energy-saving cover according to formula (2). L and O R The vertical working distance L can ensure that the compound parabolic cone reflective heat-conductive energy-saving cover has the maximum divergence angle when conducting heat, and the heat emitted by the heating plate is limited within the output aperture of the compound parabolic cone reflective heat-conductive energy-saving cover.

[0020] Considering the three modes of heat transfer, namely convection, conduction and radiation, in this patent, the composite parabolic cone reflective heat-conducting energy-saving cover is designed with a vacuum sealing layer outside the parabolic cone reflective inner wall, and a composite insulation material coating is designed outside the parabolic cone reflective outer wall to further reduce heat loss by heat conduction and heat radiation.

[0021] According to the multiple designs described above, the composite parabolic cone reflective heat-conductive energy-saving cover can be quantitatively designed according to the caliber and space size of the heating plate and the heating utensils in the implementation. At the same time, a vacuum sealing layer and a composite insulation material coating are used to greatly improve the performance of the composite parabolic cone reflective heat-conductive energy-saving cover, so it has better energy-saving effect and efficiency than other similar products such as energy-saving covers. The simulation analysis shows that the thermal efficiency of gas heating stoves is expected to increase to more than 70%, and the thermal efficiency of electric heating stoves is expected to increase to more than 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structure of the composite parabolic cone reflective heat-conducting energy-saving cover

[0023] Figure 2 Schematic diagram of the internal structure principle of the composite parabolic cone reflective heat-conducting energy-saving cover

[0024] Figure 3 Schematic diagram of the maximum divergence angle of heat transfer of the composite parabolic cone reflective heat-conducting energy-saving cover

[0025] Figure 4 Embodiment 1 of the present invention: Schematic diagram of heat conduction of composite parabolic cone reflective heat conduction energy-saving cover gas heating

[0026] Figure 5Embodiment 2 of the present invention: Schematic diagram of electrical heating and heat conduction of a composite parabolic cone reflective heat-conducting energy-saving cover DETAILED DESCRIPTION

[0027] The present invention is further described below based on the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereto.

[0028] A composite parabolic cone reflective heat-conducting energy-saving cover, characterized in that it comprises a composite parabolic cone, a heating plate and a heat-conducting energy-saving cover support frame;

[0029] The composite parabolic cone is composed of a parabolic cone reflective inner wall, a vacuum sealing layer, a parabolic cone reflective outer wall and a composite insulation material coating. The parabolic cone reflective inner wall and the parabolic cone reflective outer wall are both made of smooth metal thin walls and are made into a parabolic cone shape. The inner surfaces of the inner wall and the outer wall are plated with fire-resistant and heat-resistant high-reflective films. There is a vacuum sealing layer between the parabolic cone reflective inner wall and the parabolic cone reflective outer wall. A vacuum state is maintained in the vacuum sealing layer. The composite insulation material coating tightly wraps the parabolic cone reflective outer wall.

[0030] The parabolic cone reflective inner wall and the parabolic cone reflective outer wall are both made into a specially designed parabolic cone shape. The left and right sides of any cross section of the parabolic cone reflective inner wall along the vertical direction are both parabolas. The tangent at the edge exit of the parabolic cone reflective inner wall is parallel to the vertical direction to ensure that the maximum output aperture is obtained. The heating plate is positioned at the focus of the parabolic cone. There is a corresponding relationship between the output aperture of the composite parabolic cone reflective heat-conductive energy-saving cover and the heating plate with a maximum divergence angle. The heat emitted by the heating plate is limited within the output aperture of the composite parabolic cone reflective heat-conductive energy-saving cover. The above-mentioned special design satisfies the reverse parabola focusing principle. The heat of the heating plate at the focus of the parabola is reflected by the parabolic cone reflective inner wall and then uniformly heats the upper cooker in a direction parallel to the optical axis of the parabolic cone.

[0031] The composite parabolic cone reflective heat-conductive energy-saving cover can be matched with electric stoves, gas stoves and other heating stoves. When the bottom heating plate of the composite parabolic cone reflective heat-conductive energy-saving cover is an electric heating plate, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has no hollow grid structure. When the bottom heating plate of the composite parabolic cone reflective heat-conductive energy-saving cover is gas-fired, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has a hollow grid, which is conducive to air entering from the bottom to assist combustion. The heat-conductive energy-saving cover support frame firmly supports the composite parabolic cone reflective heat-conductive energy-saving cover, and the heating guide passes through the heat-conductive energy-saving cover support frame.

[0032] Preferably, in the production and life of residents, the heating plates and cooking utensils in the heating stoves are usually round objects, the heating plates are mainly in the shape of discs, and the cooking utensils are mostly cylindrical or inverted bamboo hat shapes. Although the specific specifications of products from different manufacturers are not the same, the manufacturers of the above two commodities all provide definite spatial dimensions and shapes. The present invention can be based on the specific requirements of the output apertures of the heating plate and the composite parabolic cone reflective heat-conductive energy-saving cover, and reversely use the parabolic focusing principle, that is, the heating plate is positioned at the focus of the parabola, and there is a corresponding relationship between the output aperture of the composite parabolic cone reflective heat-conductive energy-saving cover and the heating plate with the maximum exit angle. The specific design of the parabolic cone reflective inner wall parabola is obtained and completed through strict calculation, which is also the basic basis for the quantitative precision design of the present invention.

[0033] Preferably, the composite parabolic cone reflective heat-conductive energy-saving cover adopts both a vacuum sealing layer and a composite insulation material coating, thus having better energy-saving effect and efficiency.

[0034] Example 1: Composite parabolic cone reflective heat conduction energy-saving cover gas heating method heat conduction energy saving

[0035] A composite parabolic cone reflective heat-conductive energy-saving cover, characterized in that it comprises a composite parabolic cone 1, a heating plate 2 and a heat-conductive energy-saving cover support frame 3; the composite parabolic cone is composed of a parabolic cone reflective inner wall 11, a vacuum sealing layer 12, a parabolic cone reflective outer wall 13 and a composite insulation material coating 14, the parabolic cone reflective inner wall 11 and the parabolic cone reflective outer wall 13 are both metal thin walls with smooth surfaces and are made into a parabolic cone shape, the inner surfaces of the inner wall 11 and the outer wall 13 are plated with fire-resistant, heat-resistant and highly reflective films, there is a vacuum sealing layer 12 between the parabolic cone reflective inner wall 11 and the parabolic cone reflective outer wall 13, a vacuum state is maintained in the vacuum sealing layer 12, and the composite insulation material coating 14 tightly wraps the parabolic cone reflective outer wall 13.

[0036] The left and right sides of any cross section of the parabolic cone reflective inner wall 11 along the vertical direction are both parabolas, and the tangent at the edge exit is parallel to the vertical direction to ensure that the maximum output aperture is obtained. The edge of the heating plate 2 is positioned at the focus of the compound parabolic cone, so that there is a corresponding relationship between the maximum output aperture and the heating plate 2 with the maximum divergence angle, and the heat emitted by the heating plate 2 is limited within the output aperture of the compound parabolic cone reflective heat-conductive energy-saving cover. The heat at the edge of the heating plate 2 is reflected by the parabolic cone reflective inner wall 11 and uniformly heats the upper cooker 4 in a direction parallel to the optical axis of the parabolic cone.

[0037] The composite parabolic cone reflective heat-conductive energy-saving cover can be matched with electric stoves, gas stoves and other heating stoves. When the bottom heating plate 2 of the composite parabolic cone reflective heat-conductive energy-saving cover is an electric heating plate, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has no hollow grid structure. When the bottom heating plate 2 of the composite parabolic cone reflective heat-conductive energy-saving cover is heated by gas, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has a hollow grid 15, which is conducive to air entering from the bottom to assist combustion. The heat-conductive energy-saving cover support frame 3 firmly supports the composite parabolic cone reflective heat-conductive energy-saving cover, and the heating guide 31 passes through the heat-conductive energy-saving cover support frame 3.

[0038] like Figure 4 As shown: According to formula (1), first select the parabola shape appropriately. When P = 50, the parabola equation x 2 =100y. According to market product specifications, the diameter of the heating plate is 150mm, and the diameter of the heating bottom of the wok is 200mm.

[0039] Calculated by formula (2), when L = 50 mm, the maximum divergence angle of the composite parabolic cone reflective heat-conductive energy-saving cover is: 2 × arctan [(150 + 200) / 50] = 2 × 81.87 ° = 163.74 °. In the composite parabolic cone reflective heat-conductive energy-saving cover, more than 90% of the heat after gas combustion is limited within the maximum divergence angle of 163.74 °, and it is estimated that the thermal efficiency of the gas heating stove will be increased to more than 70%.

[0040] Embodiment 2: Composite parabolic cone reflective heat-conducting energy-saving cover electric heating method heat-conducting energy-saving

[0041] A composite parabolic cone reflective heat-conductive energy-saving cover, characterized in that it comprises a composite parabolic cone 1, a heating plate 2 and a heat-conductive energy-saving cover support frame 3; the composite parabolic cone is composed of a parabolic cone reflective inner wall 11, a vacuum sealing layer 12, a parabolic cone reflective outer wall 13 and a composite insulation material coating 14, the parabolic cone reflective inner wall 11 and the parabolic cone reflective outer wall 13 are both metal thin walls with smooth surfaces and are made into a parabolic cone shape, the inner surfaces of the inner wall 11 and the outer wall 13 are plated with fire-resistant, heat-resistant and highly reflective films, there is a vacuum sealing layer 12 between the parabolic cone reflective inner wall 11 and the parabolic cone reflective outer wall 13, a vacuum state is maintained in the vacuum sealing layer 12, and the composite insulation material coating 14 tightly wraps the parabolic cone reflective outer wall 13.

[0042] The left and right sides of any cross section of the parabolic cone reflective inner wall 11 along the vertical direction are both parabolas, and the tangent at the edge exit is parallel to the vertical direction to ensure that the maximum output aperture is obtained. The edge of the heating plate 2 is positioned at the focus of the compound parabolic cone, so that there is a corresponding relationship between the maximum output aperture and the heating plate 2 with the maximum divergence angle, and the heat emitted by the heating plate 2 is limited within the output aperture of the compound parabolic cone reflective heat-conductive energy-saving cover. The heat at the edge of the heating plate 2 is reflected by the parabolic cone reflective inner wall 11 and uniformly heats the upper cooker 4 in a direction parallel to the optical axis of the parabolic cone.

[0043] The composite parabolic cone reflective heat-conductive energy-saving cover can be matched with electric stoves, gas stoves and other heating stoves. When the bottom heating plate 2 of the composite parabolic cone reflective heat-conductive energy-saving cover is an electric heating plate, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has no hollow grid structure. When the bottom heating plate 2 of the composite parabolic cone reflective heat-conductive energy-saving cover is heated by gas, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has a hollow grid 15, which is conducive to air entering from the bottom to assist combustion. The heat-conductive energy-saving cover support frame 3 firmly supports the composite parabolic cone reflective heat-conductive energy-saving cover, and the heating guide 31 passes through the heat-conductive energy-saving cover support frame 3.

[0044] like Figure 5 As shown: According to formula (1), first select the parabola shape appropriately. When P = 50, the parabola equation x 2 =100y. According to market product specifications, the diameter of the heating plate is 180mm, and the diameter of the steamer heating bottom is 235mm.

[0045] Calculated by formula (2), when L = 40 mm, the maximum divergence angle of the composite parabolic cone reflective heat-conductive energy-saving cover is: 2 × arctan [(180 + 235) / 40] = 2 × 84.5 ° = 169 °. After the electric energy is converted into thermal energy, more than 90% of the heat is concentrated in the composite parabolic cone reflective heat-conductive energy-saving cover. It is estimated that the thermal efficiency of the electric heating stove will be increased to more than 90%.

[0046] The above implementation cases only illustrate the specific application of the patented technical solution of the present invention. The application value and intellectual property rights of this patent cannot be limited to the application content. Any modification and replacement of the technical solution or technical features described in this patent cannot deviate from and limit the scope of application and protection of this patent.

Claims

1. A composite parabolic cone reflective heat-conductive energy-saving cover, characterized in that: The invention comprises a composite parabolic cone (1), a heating plate (2) and a heat-conducting energy-saving cover support frame (3); the composite parabolic cone comprises a parabolic cone reflective inner wall (11), a vacuum sealing layer (12), a parabolic cone reflective outer wall (13) and a composite heat-insulating material coating (14); the parabolic cone reflective inner wall (11) and the parabolic cone reflective outer wall (13) are both thin metal walls with smooth surfaces and are made into a parabolic cone shape; the inner surfaces of the inner wall (11) and the outer wall (13) are plated with a fire-resistant and heat-resistant high-reflection film; a vacuum sealing layer (12) is present between the parabolic cone reflective inner wall (11) and the parabolic cone reflective outer wall (13); a vacuum state is maintained in the vacuum sealing layer (12); the composite heat-insulating material coating (14) tightly wraps the parabolic cone reflective outer wall (13); The left and right sides of any cross section of the parabolic cone reflective inner wall (11) along the vertical direction are both parabolas, with the focus as the center respectively. After the parabolas on the left and right sides rotate, the tangents at the edge exits of the parabolas are parallel to the vertical direction to ensure that the maximum output aperture is obtained. The edge of the heating plate (2) is positioned at the focus of the compound parabolic cone. After all the focuses are combined, they are located at the edge of the heating plate (2), so that there is a corresponding relationship between the maximum output aperture and the heating plate (2) with the maximum divergence angle, and the heat emitted by the heating plate (2) is limited within the output aperture of the compound parabolic cone reflective heat-conductive energy-saving cover. After the heat at the edge of the heating plate (2) is reflected by the parabolic cone reflective inner wall (11), it is evenly heated along the direction parallel to the optical axis of the parabolic cone to heat the upper cooker (4).

2. The composite parabolic cone reflective heat-conductive energy-saving cover according to claim 1, characterized in that: The composite parabolic cone reflective heat-conductive energy-saving cover can be matched with electric stoves and gas stove heating cookers. When the bottom heating plate (2) of the composite parabolic cone reflective heat-conductive energy-saving cover is an electric heating plate, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has no hollow grid structure; when the bottom heating plate (2) of the composite parabolic cone reflective heat-conductive energy-saving cover is gas heated, the bottom of the parabolic cone reflective heat-conductive energy-saving cover has a hollow grid (15), which is conducive to air entering from the bottom to assist combustion. The heat-conductive energy-saving cover support frame (3) firmly supports the composite parabolic cone reflective heat-conductive energy-saving cover, and the heating guide (31) passes through the heat-conductive energy-saving cover support frame (3).

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