Patent Application
20140080079
1. Field of the Invention
The invention relates a device for use in a burner, more particularly a burner applied to a premixed burner for infrared radiation heating, and to a method for manufacturing the same.
2. Description of the Related Art
Conventional gas appliances utilize mainly an atmospheric burner, which heats the target mainly by convection. This heating mode results in a large amount of thermal loss. In fact, the maximum thermal efficiency of the atmospheric burner does not exceed 55%. Thus, to improve the thermal efficiency in gas appliances, the existing heating mode must be modified.
Typically, as an improvement, an infrared burner can transform the ordinary physical and chemical thermal energy into infrared radiation energy. The thermal energy is transferred to the heating object in the form of infrared radiation. This heating mode effectively reduces the physical and chemical thermal losses, the thermal efficiency of the burner exceeds 68%, and the emissions of CO and NOX are far below the international discharge standard.
However, in practice, a portion of metal bands of the infrared burner is apt to protrude due to the frequent alternation between high and low temperatures, which causes the deformation and axial movement of the honeycomb body, thereby affecting the normal use of the burner.
In view of the above-described problems, it is one objective of the invention to provide a device for use in a burner free of deformation, and in use, the metal bands included therein are free of axial movement.
It is another objective of the invention to provide a method for manufacturing the device.
To achieve the above objectives, in accordance with one embodiment of the invention, there is provided a device for use in a burner, comprising a honeycomb body comprising a metal band. The metal band is laminated or coiled to yield a plurality of holes or apertures. The honeycomb body has a first surface and a second surface which are opposite to each other. The holes or apertures penetrate through the first surface and the second surface, and an outer boundary of the first surface and an outer boundary of the second surface are connected whereby yielding a lateral surface. A through hole is disposed on the lateral surface of the honeycomb body and penetrates inward through multiple layers of adjacent laminated or coiled metal bands, and a metal wire is disposed in the through hole; and/or, a part of the laminated or coiled metal bands on the first surface and/or the second surface are embedded, overlapped and engaged with adjacent metal bands to form an embedded member.
In a class of this embodiment, the holes or apertures are regular or irregular in shape, and a regular shape thereof comprises a sector, round, oval, semi-circle, triangle, or polygon.
In a class of this embodiment, a central hole having a diameter of between 2 and 300 mm is disposed in a middle of the honeycomb body to operate as an air flow channel.
In a class of this embodiment, the central hole, the lateral surface, or the both are encircled by a metal frame.
In a class of this embodiment, a groove formed by embedding the laminated or coiled metal bands is filled with a metal material, and the metal material is fixed on the laminated or coiled metal bands by welding or bonding.
In a class of this embodiment, the embedded member is formed and fixed by self-melting and welding of the laminated or coiled metal bands, or fixed by bonding.
In a class of this embodiment, the embedded member is formed on the laminated or coiled metal bands close to an inner or outer boundary of the honeycomb body.
In a class of this embodiment, the embedded member intersects with the whole of the laminated or coiled metal bands of the honeycomb body.
In a class of this embodiment, the metal band employs a corrugated metal band, or an integrated metal band comprising a corrugated metal band and a smooth metal band.
In a class of this embodiment, the metal band employs an integrated metal band comprising two corrugated metal bands, and the holes or apertures are formed between the two corrugated metal bands.
In a class of this embodiment, the first surface and/or the second surface of the honeycomb body is covered with at least one layer of metal mesh or metal fiber structure, the metal fiber structure is breathable and presents in the form of fiber mesh, fiber felt, woven mesh, or fiber paper, and a contact point between the honeycomb body and the metal mesh/the metal fiber structure is fixed by welding or bonding.
In a class of this embodiment, a thickness between the first surface and the second surface is between 1 and 300 mm.
In accordance with another embodiment of the invention, there provided is a method for manufacturing the device for use in a burner. The method comprises the following steps:
In a class of this embodiment, the method further comprises covering the first surface and/or the second surface of the honeycomb body with at least one layer of metal mesh or metal fiber structure, and welding or bonding a contact point between the honeycomb body and the metal mesh/the metal fiber structure. The metal fiber structure is breathable and presents in the form of fiber mesh, fiber felt, woven mesh, or fiber paper.
In a class of this embodiment, the method further comprises disposing a central hole having a diameter of between 2 and 300 mm in a middle of the honeycomb body to operate as an air flow channel.
In a class of this embodiment, the method further comprises disposing metal frames to encircle the central hole and the lateral surface, respectively.
In a class of this embodiment, the method further comprises filling a groove formed by embedding the metal bands with a metal material, and fixing the metal material on the laminated or coiled metal bands by welding or bonding.
In a class of this embodiment, the method further comprises fixing the embedded metal bands by self-melting and welding of the embedded metal bands, or by bonding the embedded metal bands.
In a class of this embodiment, step a) is achieved according to one of the following three steps:
In a class of this embodiment, the corrugated metal band prepared in step 1) is in the form of waveform including but not limited to sinusoidal waveform, sawtooth waveform, U-shaped waveform, or rectangular waveform.
The first surface and the second surface in the invention refer to a gas inlet surface and a gas outlet surface, respectively.
Advantages of the invention are summarized as below. The honeycomb body is formed by laminating or coiling the metal band, and the honeycomb body comprises the through hole and the metal wire disposed in the through hole, or the embedded member disposed on the first and/or second surface. Thus, the manufacturing process of the device for use in a burner is simple; the resulting device has low production cost, and can prevent the deformation and axial movement of the metal bands due to the frequent alternation between high temperature and low temperature.
For further illustrating the invention, experiments detailing a device for use in a burner and a method for manufacturing the same are described below. It should be noted that the following examples are intended to describe and not to limit the invention.
Detailed description of the invention is given below in conjunction with accompanying
As shown in
In this example, the through hole 50 and the metal wire 51 disposed in the through hole 50 constitute a special fixed structure. Conventional infrared honeycomb body is apt to expand and deform due to the frequent alternation between high and low temperatures, which causes the deformation and axial movement of the honeycomb body. The arrangement of the special fixed structure can effectively prevent the deformation and axial movement of the laminated or coiled metal bands of the honeycomb body.
As an improvement, the holes or apertures are regular or irregular in shape, and a regular shape thereof comprises a sector, round, oval, semi-circle, triangle, polygon. In contrast to elongated apertures, the holes having the above shapes have better combustion efficiency.
As an improvement, a central hole 12 having a diameter of between 2 and 300 mm is disposed in the middle of the honeycomb body 10 to operate as an air flow channel. The air flow channel allows the fuel gas to mix with the air again, thereby ensuring a complete combustion.
As an improvement, to enhance the overall structural strength of the honeycomb body, the central hole 12, the lateral surface 16, or the both are encircled by a metal frame 20, or 30 whereby fixing the honeycomb body.
As an improvement, to ensure the fixation of the metal wire 51, preferably, at least one end of the metal wire 51 is fixed on the wire band or the metal frame 20, or 30.
It should be noted that although the honeycomb body 10 is formed by laminating the metal band, it is not limited to this, the honeycomb can also be formed using other methods, for example, by coiling the metal band.
As shown in
The embedded member 60 arranged on part of the first surface and/or the second surface can effectively prevent the expansion and deformation due to the frequent alternation between high and low temperatures, thereby preventing the deformation and axial movement of the laminated or coiled metal bands of the honeycomb body. Additionally, in contrast to the device in Example 1, the device in this example has a simple manufacturing process, thereby saving the production costs.
As described in Example 1, although the honeycomb 10 is formed by laminating the metal band, it is not limited to this, and the honeycomb can also be formed using other methods, for example, by coiling the metal band.
To ensure the fixation of the embedded member, as shown in
Preferably, the embedded member is formed on some of the metal bands close to the edge of the honeycomb body. When the embedded member is disposed where the protrusion is most likely to occur, fewer embedded members can achieve the deformation resistance effect, thus simplifying the process.
Preferably, the embedded member intersects with the whole of the laminated or coiled metal bands of the honeycomb body. Such an arrangement of the embedded member simplifies the manufacturing process of the device.
Preferably, the embedded member is Y-shaped, with an outward opening. The Y-shaped embedded member can prevent the congestion thereof in the center of the honeycomb body.
Preferably, as shown in
Preferably, the embedded member 60 can be disposed on the first surface and/or the second surface. If the embedded member 60 is disposed on the first surface, upon combustion, the device can display patterns that cannot be displayed during nonuse.
To ensure a complete combustion and the overall structural strength of the honeycomb 10, a central hole 12 having a diameter of between 2 and 300 mm is disposed in the middle of the honeycomb body 10 to operate as an air flow channel, and the central hole 12, the lateral surface 16, or the both are encircled by a metal frame 20, 30.
Preferably, the metal band employs a corrugated metal band 13, or an integrated metal band comprising a corrugated metal band 13 and a smooth metal band 11. Thus, the holes or apertures of the resulting honeycomb are regular in shapes, the manufacturing process is simple, and the combustion is complete and uniform.
Preferably, the first surface 14 and/or the second surface 15 of the honeycomb body 10 is covered with at least one layer of metal mesh 40, and a contact point between the honeycomb body and the metal mesh is fixed by welding or bonding. The welding or bonding of the honeycomb body 10 and the metal mesh 40 enhances the strength of the device, prevents the deformation and axial movement of the metal bands of the honeycomb body due to the frequent alternation between high and low temperatures, and provides a uniform air flow whereby avoiding backfire.
Preferably, metal wires for forming the metal mesh have a diameter of between 0.01 and 10 mm, and the meshes of the metal mesh are between 2 and 500 per square inch.
Preferably, the metal mesh is formed by coiling and interweaving fine metal fibers irregularly.
Preferably, the honeycomb body 10 has a thickness of between 1 and 300 mm. Particularly, when the honeycomb body 10 is applied to a boiler or a large gas appliance, the thickness can reach 300 mm.
Preferably, the metal band constituting the honeycomb body 10 has a thickness of between 0.01 and 2 mm.
Preferably, the honeycomb body 10 has an opening percentage of between 10 and 95%.
Preferably, the honeycomb body 10 is made of iron-chromium alloy, nickel-chromium alloy, or titanium alloy.
Preferably, the holes or apertures are regular or irregular in shape, and a regular shape thereof comprises a sector, round, oval, semi-circle, triangle, polygon.
Optionally, to obtain the device having better combustion and fixation characteristics, in practice, Examples 1 and 2 can be combined.
A method for manufacturing the device for use in a burner as described in Example 1, comprises the following steps:
In contrast to an integrated honeycomb, the present honeycomb body formed by laminating or coiling the metal band has a much simple manufacturing process, low manufacturing costs, and high opening percentage.
Preferably, as shown in
Preferably, after the honeycomb body is prepared, a metal frame is disposed to encircle the central hole and the lateral surface 16 whereby fixing the honeycomb body.
Preferably, after the metal frame is disposed, at least one end of the metal wire is fixed on the wire band or the metal frame.
Preferably, as shown in
A method for manufacturing the device for use in a burner as described in Example 2, comprises the following steps:
As an improvement, the method further comprises filling a groove formed by embedding the laminated or coiled metal bands with a metal material, and fixing the metal material on the laminated or coiled metal bands by welding or bonding, whereby enhancing the strength of the metal device, and preventing the deformation and axial movement of the laminated or coiled metal bands of the honeycomb body due to the frequent alternation between high and low temperatures.
As an improvement, the method further comprises fixing the embedded metal bands by self-melting and welding or bonding of the embedded metal bands, whereby achieving the same welding or bonding effects as the metal filling material and saving the material cost.
Preferably, upon coiling the metal band to prepare the honeycomb body, the method further comprises disposing a central hole having a diameter of between 2 and 300 mm in the middle of the honeycomb body to operate as an air flow channel.
Preferably, after the honeycomb body is prepared, the method further comprises disposing metal frames to encircle the central hole and the lateral surface 16, respectively, for fixing the honeycomb body.
Preferably, as shown in
Optionally, to manufacture the device having better combustion and fixation characteristics, in practice, Examples 3 and 4 can be combined.
In Examples 3 and 4, step a) is achieved according to one of the following three steps:
Preferably, the corrugated metal band prepared in step 1) is in the form of waveform including but not limited to sinusoidal waveform, sawtooth waveform, U-shaped waveform, or rectangular waveform. The metal band having the above waveforms can be laminated or coiled to form holes or apertures having better combustion characteristics.
Thus, when a corrugated metal band or an integrated metal band comprising a corrugated metal band and a smooth metal band is prepared, the metal band can be laminated or coiled to yield the honeycomb body having holes or apertures with regular openings and desired opening percentage.
Unless otherwise indicated, the numerical ranges involved in the invention include the end values.
While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201110138509.9 | May 2011 | CN | national |
| 201110145728.X | Jun 2011 | CN | national |
This application is a continuation-in-part of International Patent Application No. PCT/CN2012/076128 with an international filing date of May 25, 2012, designating the United States, now pending, and further claims priority benefits to Chinese Patent Application No. 201110138509.9 filed May 26, 2011, and to Chinese Patent Application No. 201110145728.X filed Jun. 1, 2011. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P.C., Attn.: Dr. Matthias Scholl Esq., 14781 Memorial Drive, Suite 1319, Houston, Tex. 77079.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2012/076128 | May 2012 | US |
| Child | 14089844 | US |
