CN113587679B - Efficient heat exchange device - Google Patents
Efficient heat exchange device Download PDFInfo
- Publication number
- CN113587679B CN113587679B CN202110858697.6A CN202110858697A CN113587679B CN 113587679 B CN113587679 B CN 113587679B CN 202110858697 A CN202110858697 A CN 202110858697A CN 113587679 B CN113587679 B CN 113587679B
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- heat exchange
- chimney
- insulation cylinder
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 92
- 238000009413 insulation Methods 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000010992 reflux Methods 0.000 claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003546 flue gas Substances 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
- F28F1/18—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion the element being built-up from finned sections
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a high-efficiency heat exchange device, which comprises: the device comprises a combustion chamber, a heat exchange tube, a backflow flue, a burner connecting device, a chimney, heat exchange fins, a heat insulation cylinder and a mesh plate; the combustion chamber is of a cylinder type structure with trapezoid cylinders at two ends, and the two ends are closed; mounting holes for mounting the heat exchange tubes are symmetrically formed at two closed ends of the combustion chamber; the heat exchange tube is of a hollow cylinder structure and consists of an inner tube, an outer tube and a sealing ring; the reflux flue is arranged at one end of the combustion chamber provided with a chimney; the reflux flue consists of a plurality of baffles; the baffle is provided with a round hole for the heat exchange tube to pass through, and one end of the baffle is provided with a notch for the flue gas to pass through; the heat insulation cylinder is a cylinder type hollow structure with trapezoid cylinders at two ends; the heat-insulating cylinder is sleeved on the heat exchange fins outside the combustion chamber. According to the invention, by controlling the fluid heat exchange time, the heat exchange temperature difference, the heat exchange area and the heat exchange gradient, the efficient heat exchange of the fluid is realized under the condition of full combustion, and the energy utilization rate is improved.
Description
Technical Field
The invention belongs to the technical field of high-temperature fluid heat exchange, and particularly relates to a high-efficiency heat exchange device.
Background
At present, the heat transfer device that utilizes fuel or gas as the heat supply source in the market mainly has two aspects not enough, firstly heat transfer device simple structure adopts single-stage heat transfer more, and heat transfer efficiency is not high, and most heat is along with the direct exhaust of flue gas outside the sealed room, and secondly when combustion power is big, heat transfer device structure size is great, and the transport is inconvenient.
Disclosure of Invention
The invention aims to provide a high-efficiency heat exchange device, which realizes the improvement of heat exchange efficiency by prolonging the heat exchange time, increasing the relative temperature of fluid, increasing the heat exchange gradient and increasing the heat exchange area.
In order to achieve the above object, the present invention provides the following solutions: a high efficiency heat exchange device comprising: the device comprises a combustion chamber, a heat exchange tube, a backflow flue, a burner connecting device, a chimney, heat exchange fins, a heat insulation cylinder and a mesh plate; wherein,
The combustion chamber is of a cylinder type structure with trapezoid cylinders at two ends, and the two ends are closed; mounting holes for mounting the heat exchange tubes are symmetrically formed at two closed ends of the combustion chamber; the bottom of one end of the combustion chamber is provided with a connecting port communicated with the burner connecting device, and the upper part of the other end of the combustion chamber is provided with a connecting port communicated with the chimney; the heat exchange fins are arranged outside the combustion chamber;
The heat exchange tube is of a hollow cylinder structure and consists of an inner tube, an outer tube and a sealing ring; the inner tube is arranged in the outer tube, and the two ends of the inner tube and the outer tube are connected through sealing rings, so that a closed space is formed between the inner tube and the outer tube of the heat exchange tube; a plurality of vent holes are formed in the outer tube; the heat exchange tube is connected with the combustion chamber in a sealing way through the assembly holes at the two ends of the combustion chamber and is axially matched with the combustion chamber; the low-temperature fluid flows in from one end of the heat insulation cylinder, flows to the other end of the heat insulation cylinder through a hollow channel of the heat exchange tube and flows out through the mesh plate;
The reflux flue is arranged at one end of the combustion chamber provided with a chimney; the reflux flue consists of a plurality of baffles; the baffle is a circular plate with the diameter equal to the inner diameter of the combustion chamber, a round hole for the heat exchange tube to pass through is formed in the baffle, and a gap for the flue gas to pass through is reserved at one end of the baffle; the baffle is connected with the inner wall of the combustion chamber and the heat exchange tube in a sealing way; the tail end of the reflux flue is communicated to the chimney;
The heat insulation cylinder is of a cylinder type hollow structure with trapezoid cylinders at two ends; the heat insulation cylinder is sleeved on the heat exchange fins outside the combustion chamber; a through hole for allowing the burner connecting device to pass through is formed in the bottom of one end of the heat insulation cylinder, and a through hole for allowing the chimney to pass through is formed in the upper part of the other end of the heat insulation cylinder;
The burner connecting device is arranged at the bottom of the combustion chamber and is connected with the combustion chamber and the heat insulation cylinder in a sealing way; the chimney is arranged at the top of the combustion chamber and is connected with the combustion chamber and the heat insulation cylinder in a sealing way; the mesh plate is arranged at one end of the heat insulation cylinder, which is close to the chimney.
Preferably, the first return smoke inlet of the return smoke channel is positioned at the upper end of the combustion chamber, the next return smoke inlet of the smoke is positioned at the lower end of the combustion chamber, the next return smoke inlet is positioned at the upper end of the combustion chamber, and so on; the last return smoke outlet is connected with the chimney, and the joint is sealed.
The invention has at least the following beneficial effects:
1) Through the design of a backflow flue in the combustion chamber, the back pressure is increased, the flow speed of high-temperature flue gas is reduced, the reaction time of combustible materials in the combustion chamber is increased, and the full combustion and heat exchange are ensured;
2) Through the design of the relative positions of the heat exchange pipes and the heat exchange fins on the combustion chamber, the heat exchange area is increased, the maximization of the relative temperature difference of high-temperature fluid and low-temperature fluid is ensured, and the heat exchange is enhanced;
3) The space structure design formed by the heat insulation cylinder and the combustion chamber is used for dividing the low-temperature fluid to form gradient heat exchange, so that the heat exchange efficiency is improved;
4) Through the design of the air mixing chamber consisting of the heat insulation cylinder, the combustion chamber and the mesh plate, the pressure of the heat absorption fluid flow channel is increased, the flow velocity of the low-temperature fluid is reduced, the sufficient heat absorption time of the low-temperature fluid is ensured, and the heat exchange is enhanced.
Drawings
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is a schematic flow diagram of a high temperature combustion fluid and a low temperature fluid according to the present invention;
FIG. 3 is a schematic view of a heat exchange tube according to the present invention;
Fig. 4 and 5 are schematic views of the baffle plate of the present invention.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings, and it will be understood by those skilled in the art that the following examples are for illustration only and should not be construed as limiting the scope of the invention. The specific techniques, connections, or conditions are not identified in the examples and are set forth in accordance with the techniques, connections, conditions, or in accordance with the product specifications described in the literature in this field. The materials, instruments or equipment used are conventional products available from commercial sources, not identified to the manufacturer.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "provided" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention is understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 5, the present invention provides a high-efficiency heat exchange device, including: the heat exchange device comprises a combustion chamber 1, a heat exchange pipe 2, a backflow flue 3, a burner connecting device 4, a chimney 5, heat exchange fins 6, a heat insulation cylinder 7 and a mesh plate 8;
The combustion chamber 1 is of a cylinder type structure with trapezoid cylinders at two ends, and the two ends are closed; mounting holes for mounting the heat exchange tubes 2 are symmetrically formed at the two closed ends of the combustion chamber 1; the bottom of one end of the combustion chamber 1 is provided with a connecting port communicated with the burner connecting device 4, and the upper part of the other end is provided with a connecting port communicated with the chimney 5; the heat exchange fins 6 are arranged outside the combustion chamber 1;
The heat exchange tube 2 is of a hollow cylinder structure and consists of an inner tube 21, an outer tube 22 and a sealing ring 23; the inner tube 21 is arranged in the outer tube 22, and the two ends of the inner tube 21 and the outer tube 22 are connected through the sealing ring 23, so that a closed space is formed between the inner tube and the outer tube of the heat exchange tube 2; a plurality of vent holes 24 are formed in the outer tube 22; the low-temperature fluid flows in from one end of the heat insulation cylinder 7, flows to the other end of the heat insulation cylinder 7 through a hollow channel of the heat exchange tube 2, and flows out through the mesh plate 8;
The backflow flue 3 is arranged at one end of the combustion chamber 1 provided with a chimney 5; the return flue 3 is composed of a plurality of baffles 31; the baffle plate 31 is a circular plate with the diameter equal to the inner diameter of the combustion chamber 1, a round hole 32 for the heat exchange tube 2 to pass through is formed in the baffle plate 31, and a gap 33 for the flue gas to pass through is reserved at one end of the baffle plate 31; the positions of the round holes 32 on the baffle 31 are opened according to specific conditions, as shown in fig. 4 and 5; the baffle 31 is connected with the inner wall of the combustion chamber 1 and the heat exchange tube 2 in a sealing way; the tail end of the reflux flue 3 is communicated with the chimney 5; the heat insulation cylinder 7 is of a cylinder type hollow structure with trapezoid cylinders at two ends; the heat insulation cylinder 7 is sleeved on the heat exchange fins 6 outside the combustion chamber 1.
Referring again to fig. 1, the relative assembly relationship between the components of the present invention is as follows: the backflow flue 3 is arranged in the right end of the combustion chamber 1 and is combined with the wall surface of the combustion chamber 1 to form a multi-return-stroke sealing flue; the heat exchange tube 2 passes through the baffle plate of the backflow flue 3 and is lapped in the assembly holes at the two ends of the combustion chamber 1 to form axial fit with the combustion chamber 1, and the joint is sealed; the burner connecting device 4 and the chimney 5 are respectively arranged at the bottom and the top of the combustion chamber 1, and the joint is sealed; the heat exchange fins 6 are fixed on the outer wall surface between the two end surfaces of the combustion chamber 1; the heat insulation cylinder 7 is sleeved on the heat exchange fins 6 outside the combustion chamber 1; the outlet of the chimney 5 and the outlet of the burner connecting device 4 on the heat insulation cylinder 7 are respectively in sealing fit with the chimney 5 and the burner connecting device 4; the mesh plate 8 is arranged on the end face of the heat insulation cylinder 7, which is provided with a connection port of the chimney 5. According to the invention, by controlling the fluid heat exchange time, the heat exchange temperature difference, the heat exchange area and the heat exchange echelon, under the condition of full combustion, the efficient heat exchange of the fluid is realized, the energy utilization rate is improved, and the emission of pollutants is reduced; meanwhile, miniaturization and modularization are realized through reasonable combination design of the structure.
According to a further optimization scheme, the first return smoke inlet position (namely a notch 33) of the return smoke duct 3 is positioned at the upper end of the combustion chamber 1, the next return smoke inlet position of smoke is positioned at the lower end of the combustion chamber 1, the next return smoke inlet position is positioned at the upper end of the combustion chamber 1, and so on; the last return smoke outlet is connected with the chimney 5, and the connection part is sealed.
The principles of the present invention are described below: the high-temperature combustion fluid and the low-temperature fluid enter the heat exchange device through the left ends of the burner connecting device 4 and the heat insulation cylinder 7 respectively; the flow speed of the high-temperature combustion fluid entering the combustion chamber 1 is reduced under the action of the multi-return resistance of the return flue 3, so that the secondary full reaction heating of the high-temperature combustion fluid is ensured; the fully reacted flue gas is discharged to the atmosphere through a backflow flue 3 and a chimney 5; the low-temperature fluid flows into the heat insulation cylinder 7, is proportionally split by the trapezoid structure at the end part of the combustion chamber 1, part of the low-temperature fluid flows through the inside of the heat exchange tube 2, and part of the low-temperature fluid flows through an annular flow passage formed by the heat insulation cylinder 7 and the combustion chamber 1; the low-temperature fluid flowing through the heat exchange tube 2 fully absorbs heat in the combustion chamber 1 in the heat exchange tube 2 and flows out from the other end of the heat exchange tube 2; the low-temperature fluid flowing through the annular flow channel formed by the heat insulation cylinder 7 and the combustion chamber 1 fully absorbs heat on the outer wall surface of the combustion chamber 1 and the heat exchange fins 6 in the annular flow channel and flows out through the other end of the annular flow channel; the heated low-temperature fluid flowing out of the heat exchange tube 2 and the heated low-temperature fluid flowing out of the annular flow passage are evenly mixed in a mixing chamber formed by the mesh plate 8, the heat insulation cylinder 7 and the combustion chamber 1, and then flow out through the mesh plate 8 at a flat speed; the mesh plate 8 and the heat exchange fins 6 can play a role in reducing the speed of low-temperature fluid, so that the sufficient heat absorption time is ensured; the low-temperature fluid flowing through the annular flow channel formed by the heat insulation cylinder 7 and the combustion chamber 1 not only can fully absorb heat, but also can play a role in heat insulation, and the high-temperature burn on the human body formed by the outer wall of the heat insulation cylinder 7 is avoided.
It is to be understood that in the description of the present invention, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (2)
1. A high efficiency heat exchange device, comprising: the device comprises a combustion chamber (1), a heat exchange tube (2), a backflow flue (3), a burner connecting device (4), a chimney (5), heat exchange fins (6), a heat insulation cylinder (7) and a mesh plate (8); wherein,
The combustion chamber (1) is of a cylinder type structure with trapezoid cylinders at two ends, and the two ends are closed; the two closed ends of the combustion chamber (1) are symmetrically provided with assembly holes for installing the heat exchange tube (2); the bottom of one end of the combustion chamber (1) is provided with a connecting port communicated with the burner connecting device (4), and the upper part of the other end of the combustion chamber is provided with a connecting port communicated with the chimney (5); the heat exchange fins (6) are arranged outside the combustion chamber (1);
The heat exchange tube (2) is of a hollow cylinder structure and consists of an inner tube (21), an outer tube (22) and a sealing ring (23); the inner tube (21) is arranged in the outer tube (22), and the two ends of the inner tube (21) and the outer tube (22) are connected through sealing rings (23), so that a closed space is formed between the inner tube and the outer tube of the heat exchange tube (2); a plurality of vent holes (24) are formed in the outer tube (22); the heat exchange tube (2) is connected with the combustion chamber (1) in a sealing way through the assembly holes at the two ends of the combustion chamber (1);
The backflow flue (3) is arranged at one end of the combustion chamber (1) provided with a chimney (5); the reflux flue (3) consists of a plurality of baffles (31); the baffle plate (31) is a circular plate with the diameter equal to the inner diameter of the combustion chamber (1), a round hole (32) for the heat exchange tube (2) to pass through is formed in the baffle plate (31), and a gap (33) for the flue gas to pass through is reserved at one end of the baffle plate (31); the baffle (31) is connected with the inner wall of the combustion chamber (1) and the heat exchange tube (2) in a sealing way; the tail end of the reflux flue (3) is communicated with the chimney (5);
The heat insulation cylinder (7) is of a cylinder type hollow structure with trapezoid cylinders at two ends; the heat insulation cylinder (7) is sleeved on the combustion chamber (1) and the heat exchange fins (6) outside the combustion chamber (1); a through hole for allowing the burner connecting device (4) to pass through is formed in the bottom of one end of the heat insulation cylinder (7), and a through hole for allowing the chimney (5) to pass through is formed in the upper part of the other end;
The burner connecting device (4) is arranged at the bottom of the combustion chamber (1) and is connected with the combustion chamber (1) and the heat insulation cylinder (7) in a sealing way; the chimney (5) is arranged at the top of the combustion chamber (1) and is connected with the combustion chamber (1) and the heat insulation cylinder (7) in a sealing way; the mesh plate (8) is arranged at one end of the heat insulation cylinder (7) close to the chimney (5); the low-temperature fluid flows in from one end of the heat insulation cylinder (7), flows to the other end of the heat insulation cylinder (7) through a hollow channel of the heat exchange tube (2), and flows out through the mesh plate (8);
The relative assembly relationship of the above components is as follows: the backflow flue (3) is arranged in the right end of the combustion chamber (1) and is combined with the wall surface of the combustion chamber (1) to form a multi-return-stroke sealing flue; the heat exchange pipe (2) passes through a baffle plate of the backflow flue (3) and is lapped in assembly holes at two ends of the combustion chamber (1) to form axial fit with the combustion chamber (1), and the joint is sealed; the burner connecting device (4) and the chimney (5) are respectively arranged at the bottom and the top of the combustion chamber (1), and the joint is sealed; the heat exchange fins (6) are fixed on the outer wall surface between the two end surfaces of the combustion chamber (1); the heat insulation cylinder (7) is sleeved on the heat exchange fins (6) outside the combustion chamber (1); the outlet of the chimney (5) and the outlet of the burner connecting device (4) on the heat insulation cylinder (7) are respectively in sealing fit with the chimney (5) and the burner connecting device (4); the mesh plate (8) is arranged on the end face of the heat insulation cylinder (7) provided with a connecting port of the chimney (5).
2. A high efficiency heat exchange device as defined in claim 1, wherein: the first return smoke inlet of the return smoke duct (3) is positioned at the upper end of the combustion chamber (1), the next return smoke inlet of the smoke is positioned at the lower end of the combustion chamber (1), the next return smoke inlet is positioned at the upper end of the combustion chamber (1), and so on; the last return smoke outlet is connected with a chimney (5), and the connection part is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858697.6A CN113587679B (en) | 2021-07-28 | 2021-07-28 | Efficient heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858697.6A CN113587679B (en) | 2021-07-28 | 2021-07-28 | Efficient heat exchange device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113587679A CN113587679A (en) | 2021-11-02 |
| CN113587679B true CN113587679B (en) | 2024-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110858697.6A Active CN113587679B (en) | 2021-07-28 | 2021-07-28 | Efficient heat exchange device |
Country Status (1)
| Country | Link |
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| CN (1) | CN113587679B (en) |
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| CN102230626A (en) * | 2011-06-02 | 2011-11-02 | 中冶京诚工程技术有限公司 | Flat-tube self-preheating burner of flow splitting plate |
| KR20170041007A (en) * | 2015-10-06 | 2017-04-14 | 주식회사 경동나비엔 | Combustion apparatus having structure for cooling combustion chamber and combustion heat recovery |
| CN110925729A (en) * | 2019-12-31 | 2020-03-27 | 浙江惠厨节能科技有限公司 | Gas steam engine heat exchanger combining fin plate structure and flat tube structure |
| CN112161264A (en) * | 2020-07-06 | 2021-01-01 | 广东万和热能科技有限公司 | Full-premixing heat exchange combustion system and combustion heat equipment |
| CN212719722U (en) * | 2020-05-30 | 2021-03-16 | 广东万和热能科技有限公司 | Full-premixing condensing heat exchanger and gas heating stove with same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101692209B1 (en) * | 2008-09-10 | 2017-01-03 | 파이브스 스탕 | Recuperator for a radiating tube burner |
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2021
- 2021-07-28 CN CN202110858697.6A patent/CN113587679B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050000128A (en) * | 2003-06-23 | 2005-01-03 | 주식회사 경동보일러 | Structure of Heat Exchanger in Gas Boiler |
| CN101603736A (en) * | 2008-06-15 | 2009-12-16 | 宋焕臣 | Volume-type condensing gas furnace heat exchanger |
| CN102230626A (en) * | 2011-06-02 | 2011-11-02 | 中冶京诚工程技术有限公司 | Flat-tube self-preheating burner of flow splitting plate |
| KR20170041007A (en) * | 2015-10-06 | 2017-04-14 | 주식회사 경동나비엔 | Combustion apparatus having structure for cooling combustion chamber and combustion heat recovery |
| CN110925729A (en) * | 2019-12-31 | 2020-03-27 | 浙江惠厨节能科技有限公司 | Gas steam engine heat exchanger combining fin plate structure and flat tube structure |
| CN212719722U (en) * | 2020-05-30 | 2021-03-16 | 广东万和热能科技有限公司 | Full-premixing condensing heat exchanger and gas heating stove with same |
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| CN113587679A (en) | 2021-11-02 |
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