CN113532157A - Novel pipeline type fin spiral-flow heat exchanger - Google Patents
Novel pipeline type fin spiral-flow heat exchanger Download PDFInfo
- Publication number
- CN113532157A CN113532157A CN202011162080.2A CN202011162080A CN113532157A CN 113532157 A CN113532157 A CN 113532157A CN 202011162080 A CN202011162080 A CN 202011162080A CN 113532157 A CN113532157 A CN 113532157A
- Authority
- CN
- China
- Prior art keywords
- air
- flue gas
- tooth
- flange
- heat exchanger
- 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.)
- Pending
Links
- 239000003546 flue gas Substances 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000004891 communication Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 239000007769 metal material Substances 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F28D7/10—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 the conduits being arranged one within the other, e.g. concentrically
- F28D7/103—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 the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention provides a novel pipeline type fin spiral-flow type heat exchanger which comprises a flue gas pipeline, an air inner pipe and an air outer pipe, wherein a heat conduction net is fixedly arranged on the inner wall of the flue gas pipeline, the air inner pipe is arranged in a hollow mode, the air inner pipe penetrates through the flue gas pipeline, the air outer pipe is arranged in a hollow mode, the air outer pipe is sleeved on the outer side of the flue gas pipeline, one end of the air inner pipe is communicated with the air outer pipe, and one end of the air inner pipe and one end of the air outer pipe are both provided with connecting flanges.
Description
Technical Field
The invention belongs to the technical field of flue gas waste heat exchangers, and particularly relates to a novel pipeline type fin spiral-flow type heat exchanger.
Background
A large number of boilers are used in the steel industry, a large amount of smoke can be generated by the boilers, a large amount of waste heat can be taken away by the smoke, and resource waste is caused. So technicians are always studying the reuse of the flue gas waste heat.
The boiler combustion needs to enter a large amount of air, and the direct entering of cold air can cause resource waste. At present, a fin self-preheating burner heated by smoke waste heat is generally used, and air with a certain temperature can enter the burner. The air after the waste heat can greatly improve the combustion temperature in the boiler.
After long-term use, the heat exchange efficiency of the existing fin self-preheating burner is low, the utilization rate is less than 10%, the use cost is high, the temperature of the discharged flue gas is high, the waste heat is not fully utilized, and waste energy is caused.
In view of this, technical personnel have developed a novel pipeline formula fin spiral-flow heat exchanger, have improved the temperature of the air that the nozzle got into by a wide margin, and the temperature of flue gas is not high moreover, and the heat exchange is abundant, improves energy utilization, reaches energy-conserving effect, and this technique need not change the nozzle simultaneously, practices thrift the cost.
Disclosure of Invention
The invention provides a novel pipeline type fin spiral-flow type heat exchanger which has the possibility of improving the heat exchange degree between flue gas and air.
The technical scheme of the invention is realized as follows: the utility model provides a novel pipeline formula fin spiral-flow type heat exchanger, includes flue gas pipeline, air inner tube and air outer tube, and the fixed heat conduction net that is provided with of flue gas pipeline inner wall, air inner tube are the cavity setting, and the air inner tube runs through to set up in flue gas pipeline's inside, and the air outer tube is the cavity setting, and the outside of flue gas pipeline is located to the air outer tube cover, is linked together between the one end of air inner tube and the air outer tube, and the one end of air inner tube and the one end of air outer tube all are provided with flange.
In a preferred embodiment, the air inlet end of the air outer pipe is provided with the connecting flange; the air outlet end of the air inner pipe is provided with the connecting flange.
As a preferred embodiment, install the buffering cavity on the lower part side of flue gas pipeline, the buffering cavity does not communicate flue gas pipeline, and the both ends of buffering cavity communicate air inner tube and air outer tube respectively.
In a preferred embodiment, the lower end of the air inner pipe is arranged to penetrate through the side surface of the flue gas pipeline, and the air inner pipe is communicated with the air outer pipe.
As a preferred embodiment, be provided with a plurality of fins on flue gas pipeline's the surface, the fin is hollow design and fin and air outer tube intercommunication, the inside of air inner tube is provided with a spiral helicine spinning disk, and the spinning disk setting is intraductal and both ends communicate flue gas pipeline respectively in the air.
In a preferred embodiment, the heat-conducting mesh is made of a metal material.
As a preferred embodiment, the connecting flange includes a tubular interface, a flange body and a ring-shaped flange, wherein the tubular interface is used for inserting an air inner pipe or an air outer pipe, the tubular interface is fixedly arranged on one side of the flange body, the ring-shaped flange is arranged on the other side of the flange body, and the ring-shaped flange and the flange body are fixedly connected through bolts.
As a preferable embodiment, a fixing gasket is arranged between the flange body and the annular flange, the fixing gasket is arranged in an annular shape, a left side surface of the fixing gasket is provided with a first tooth-shaped portion, the first tooth-shaped portion is provided with an inclination angle, a right side surface of the flange body is provided with a second tooth-shaped portion, and the second tooth-shaped portion is matched with the first tooth-shaped portion.
In a preferred embodiment, the right side surface of the fixing washer is provided with a third toothed portion, the third toothed portion is provided with an inclination angle, the left side surface of the annular flange is provided with a fourth toothed portion, and the fourth toothed portion and the third toothed portion are matched with each other.
In a preferred embodiment, the inclination angles of the first tooth-shaped part and the third tooth-shaped part are set at opposite angles.
According to the invention, the air outer pipe and the fins are utilized for carrying out primary heat exchange, the air inner pipe, the rotational flow sheets and the fins are utilized again for carrying out secondary heat exchange, the secondary heat exchange can fully carry out heat exchange, the temperature of air entering the burner is greatly increased, the temperature of flue gas is not high, the heat exchange is full, the energy utilization rate is increased, the energy-saving effect is achieved, meanwhile, the burner does not need to be replaced, and the cost is saved. Because of the heat conduction net adopts the metal material, the heat conductivity is better, and the heat of flue gas heat eminence carries out quick diffusion conduction through the heat conduction net, conducts to the low department of flue gas heat, carries out the heat transfer with the flue gas of this department, improves the heat degree of this department flue gas. The fixing washer improves the fixing property between the flange body and the annular flange, meanwhile, a filter plate can be mounted between the flange body and the annular flange, the filter plate is limited and fixed in a tooth-shaped part mode, air in the air inner pipe and air in the air outer pipe is filtered, and the possibility of environmental pollution is reduced.
After the technical scheme is adopted, the invention has the beneficial effects that:
1. according to the invention, the air outer pipe and the fins are utilized for carrying out primary heat exchange, the air inner pipe, the rotational flow sheets and the fins are utilized again for carrying out secondary heat exchange, the secondary heat exchange can fully carry out heat exchange, the temperature of air entering the burner is greatly increased, the temperature of flue gas is not high, the heat exchange is full, the energy utilization rate is increased, the energy-saving effect is achieved, meanwhile, the burner does not need to be replaced, and the cost is saved.
2. Because of the heat conduction net adopts the metal material, the heat conductivity is better, and the heat of flue gas heat eminence carries out quick diffusion conduction through the heat conduction net, conducts to the low department of flue gas heat, carries out the heat transfer with the flue gas of this department, improves the heat degree of this department flue gas.
3. The fixing washer improves the fixing property between the flange body and the annular flange, meanwhile, a filter plate can be mounted between the flange body and the annular flange, the filter plate is limited and fixed in a tooth-shaped part mode, air in the air inner pipe and air in the air outer pipe is filtered, and the possibility of environmental pollution is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of a flue gas duct;
fig. 3 is a schematic structural view of the connecting flange.
In the figure, 1-flue gas duct; 2-a buffer cavity; 3-a connecting flange; 4-an air outer tube; 5-a spinning disk; 6-heat conducting net; 7-a connecting flange; 8-air inner pipe; 9-a flange body; 10-ring-shaped flange; 11-a tubular interface; 12-fixing the washer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to fig. 1 to 3, a novel pipeline formula fin spiral-flow heat exchanger, including flue gas pipeline 1, air inner tube 8 and air outer tube 4, the fixed heat conduction net 6 that is provided with of 1 inner wall of flue gas pipeline, air inner tube 8 is the cavity setting, air inner tube 8 runs through the inside that sets up in flue gas pipeline 1, air outer tube 4 is the cavity setting, the outside of flue gas pipeline 1 is located to air outer tube 4 cover, is linked together between the one end of air inner tube 8 and the air outer tube 4, the one end of air inner tube 8 and the one end of air outer tube 4 all are provided with flange 73.
The connecting flange 73 is arranged at the air inlet end of the air outer pipe 4; the air outlet end of the air inner pipe 8 is provided with the connecting flange 73. Install buffering cavity 2 on the lower part side of flue gas pipeline 1, buffering cavity 2 does not communicate flue gas pipeline 1, and the both ends of buffering cavity 2 communicate air inner tube 8 and air outer tube 4 respectively.
The lower end of the air inner pipe 8 penetrates through the side face of the flue gas pipeline 1, and the air inner pipe 8 is communicated with the air outer pipe 4. Be provided with a plurality of fins on flue gas pipeline 1's the surface, the fin is hollow design and fin and 4 intercommunications of air outer tube, the inside of air inner tube 8 is provided with a spiral helicine spinning disk 5, and spinning disk 5 sets up and communicates flue gas pipeline 1 respectively at air inner tube 8 interior and both ends.
The heat conduction net 6 is made of metal material. The connecting flange 73 includes a tubular interface 11, a flange body 9 and a ring-shaped flange 10, wherein the tubular interface 11 is used for inserting the air inner tube 8 or the air outer tube 4, the tubular interface 11 is fixedly disposed on one side of the flange body 9, the ring-shaped flange 10 is disposed on the other side of the flange body 9, and the ring-shaped flange 10 and the flange body 9 are fixedly connected through bolts.
A fixing gasket 12 is arranged between the flange body 9 and the annular flange 10, the fixing gasket 12 is arranged in an annular shape, a first tooth-shaped portion is arranged on the left side surface of the fixing gasket 12, an inclination angle is arranged on the first tooth-shaped portion, a second tooth-shaped portion is arranged on the right side surface of the flange body 9, and the second tooth-shaped portion is matched with the first tooth-shaped portion.
The right side surface of the fixed washer 12 is provided with a third tooth-shaped portion, the third tooth-shaped portion is provided with an inclination angle, the left side surface of the annular flange 10 is provided with a fourth tooth-shaped portion, and the fourth tooth-shaped portion is matched with the third tooth-shaped portion. The inclination angles of the first tooth-shaped part and the third tooth-shaped part are arranged in opposite angles.
According to the invention, the air outer pipe 4 and the fins are utilized for carrying out primary heat exchange, the air inner pipe 8, the vortex sheet 5 and the fins are utilized again for carrying out secondary heat exchange, the secondary heat exchange can be carried out fully, the temperature of air entering the burner is greatly increased, the temperature of flue gas is not high, the heat exchange is full, the energy utilization rate is increased, the energy-saving effect is achieved, meanwhile, the burner does not need to be replaced, and the cost is saved. Because of heat conduction net 6 adopts the metal material, the heat conductivity is better, and the heat of flue gas heat eminence carries out quick diffusion conduction through heat conduction net 6, conducts to the low department of flue gas heat, carries out the heat transfer with the flue gas of this department, improves the heat degree of this department flue gas. The fixing property between the flange body 9 and the annular flange 10 is improved through the fixing washer 12, meanwhile, a filter plate can be mounted between the flange body 9 and the annular flange 10, the filter plate is limited and fixed in a tooth-shaped part mode, air in the air inner pipe 8 and air outer pipe 4 is filtered, and the possibility of environmental pollution is reduced.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel pipeline formula fin spiral-flow type heat exchanger, a serial communication port, including flue gas pipeline, air inner tube and air outer tube, the fixed heat conduction net that is provided with of flue gas pipeline inner wall, the air inner tube is the cavity setting, the air inner tube runs through the inside that sets up in flue gas pipeline, the air outer tube is the cavity setting, the outside of flue gas pipeline is located to air outer tube cover, be linked together between the one end of air inner tube and the air outer tube, the one end of air inner tube and the one end of air outer tube all are provided with flange.
2. The novel tubular fin cyclone heat exchanger according to claim 1, wherein the connecting flange is mounted at the air inlet end of the air outer tube; the air outlet end of the air inner pipe is provided with the connecting flange.
3. The novel pipe type fin spiral-flow heat exchanger as claimed in claim 1, wherein a buffer cavity is installed on the side of the lower portion of the flue gas pipeline, the buffer cavity is not communicated with the flue gas pipeline, and two ends of the buffer cavity are respectively communicated with the air inner pipe and the air outer pipe.
4. The novel tubular fin spiral-flow heat exchanger as claimed in claim 1, wherein the lower end of the air inner tube is disposed through the side of the flue gas duct, and the air inner tube is communicated with the air outer tube.
5. The novel tubular fin spiral-flow type heat exchanger according to claim 1, wherein a plurality of fins are arranged on the outer surface of the flue gas pipeline, the fins are hollow and communicated with the outer air pipe, a spiral-flow sheet is arranged inside the inner air pipe, the spiral-flow sheet is arranged in the inner air pipe, and two ends of the spiral-flow sheet are respectively communicated with the flue gas pipeline.
6. The new tubular fin cyclonic heat exchanger of claim 1, wherein the heat conducting mesh is made of metal.
7. The novel tubular fin spiral-flow type heat exchanger of claim 1, wherein the connecting flange comprises a tubular interface, a flange body and a ring-shaped flange, wherein the tubular interface is used for inserting an air inner tube or an air outer tube, the tubular interface is fixedly arranged at one side of the flange body, the ring-shaped flange is arranged at the other side of the flange body, and the ring-shaped flange is fixedly connected with the flange body through bolts.
8. The novel tubular fin spiral-flow type heat exchanger as claimed in claim 7, wherein a fixing washer is disposed between the flange body and the annular flange, the fixing washer is disposed in an annular shape, a first tooth-shaped portion is disposed on a left side surface of the fixing washer, the first tooth-shaped portion is disposed at an inclined angle, a second tooth-shaped portion is disposed on a right side surface of the flange body, and the second tooth-shaped portion and the first tooth-shaped portion are adapted to each other.
9. The novel tubular fin spiral-flow type heat exchanger as claimed in claim 8, wherein the right side surface of the fixing washer is provided with a third tooth-shaped portion, the third tooth-shaped portion is provided with an inclination angle, the left side surface of the annular flange is provided with a fourth tooth-shaped portion, and the fourth tooth-shaped portion and the third tooth-shaped portion are matched with each other.
10. The novel tubular finned cyclonic heat exchanger of claim 9, wherein the angles of inclination of the first and third tooth form are at opposite angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162080.2A CN113532157A (en) | 2020-10-27 | 2020-10-27 | Novel pipeline type fin spiral-flow heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162080.2A CN113532157A (en) | 2020-10-27 | 2020-10-27 | Novel pipeline type fin spiral-flow heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113532157A true CN113532157A (en) | 2021-10-22 |
Family
ID=78124167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011162080.2A Pending CN113532157A (en) | 2020-10-27 | 2020-10-27 | Novel pipeline type fin spiral-flow heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113532157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234933A (en) * | 2022-06-06 | 2022-10-25 | 江苏瑞鼎环境工程有限公司 | Smoke exhaust waste heat recycling device for gas steam boiler and utilization method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293789Y (en) * | 1997-04-18 | 1998-10-07 | 王政民 | Straight-through double spiral-flow double pipe heat exchanger |
| CN2432221Y (en) * | 2000-07-25 | 2001-05-30 | 宝山钢铁股份有限公司 | Combustion-supporting air preheater for cover annealing furnace |
| CN200941019Y (en) * | 2006-07-20 | 2007-08-29 | 苏宇贵 | Heat exchanger for air conditioner |
| CN211232925U (en) * | 2019-11-16 | 2020-08-11 | 上海逊河机电设备安装有限公司 | Flue gas pipeline |
-
2020
- 2020-10-27 CN CN202011162080.2A patent/CN113532157A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293789Y (en) * | 1997-04-18 | 1998-10-07 | 王政民 | Straight-through double spiral-flow double pipe heat exchanger |
| CN2432221Y (en) * | 2000-07-25 | 2001-05-30 | 宝山钢铁股份有限公司 | Combustion-supporting air preheater for cover annealing furnace |
| CN200941019Y (en) * | 2006-07-20 | 2007-08-29 | 苏宇贵 | Heat exchanger for air conditioner |
| CN211232925U (en) * | 2019-11-16 | 2020-08-11 | 上海逊河机电设备安装有限公司 | Flue gas pipeline |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234933A (en) * | 2022-06-06 | 2022-10-25 | 江苏瑞鼎环境工程有限公司 | Smoke exhaust waste heat recycling device for gas steam boiler and utilization method thereof |
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Application publication date: 20211022 |
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