CN109405622A - Heat exchange fin is used in a kind of recycling of boiler afterheat - Google Patents

Heat exchange fin is used in a kind of recycling of boiler afterheat Download PDF

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Publication number
CN109405622A
CN109405622A CN201811342993.5A CN201811342993A CN109405622A CN 109405622 A CN109405622 A CN 109405622A CN 201811342993 A CN201811342993 A CN 201811342993A CN 109405622 A CN109405622 A CN 109405622A
Authority
CN
China
Prior art keywords
heat exchange
exchange fin
tube body
slot
boiler afterheat
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
Application number
CN201811342993.5A
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Chinese (zh)
Inventor
王姜愉
屠佳妮
钱侃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Jinrui Energy Technology Co Ltd
Original Assignee
Ningbo Jinrui Energy Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ningbo Jinrui Energy Technology Co Ltd filed Critical Ningbo Jinrui Energy Technology Co Ltd
Priority to CN201811342993.5A priority Critical patent/CN109405622A/en
Publication of CN109405622A publication Critical patent/CN109405622A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/24Tubular 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 transversely
    • F28F1/30Tubular 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 transversely the means being attachable to the element

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a kind of boiler afterheat recycling heat exchange fins, including tube body, the outer surface of tube body is equipped with slot, it is equipped with and the matched inserted link of slot in the slot, the slot bottom is equipped with sliding slot, is equipped with pin rod in the sliding slot, the first spring is equipped between the pin rod and sliding slot bottom, the inserted link bottom be equipped with the matched pin hole of pin rod, the inserted link side is fixedly connected with support plate.The present invention passes through slot and inserted link Matching installation heat exchange fin, and the first spring is cooperated to hinder inserted link mobile by pin rod and pin hole, to make heat exchange fin fix, heat exchange fin is matched by metal conducting strip with tube body, conduct heat, fixed ring passes through through-hole, heat exchange fin passes through ball adjusting position, facilitate installation and removal, it is convenient to clean, second spring can be such that heat exchange fin is uniformly distributed, while increase the contact area with refrigerant, the boiler afterheat rate of recovery is improved, to solve the problems mentioned in the above background technology.

Description

Heat exchange fin is used in a kind of recycling of boiler afterheat
Technical field
The present invention relates to technical field of heat exchangers, in particular to heat exchange fin is used in a kind of boiler afterheat recycling.
Background technique
Industrial Boiler is the main thermal powerplant in China, and with China's rapid economic development, energy consumption increasingly increases Add, one of the main reason for energy consumption is high, pollution is high is exactly the flue gas emission of boiler, and general exhaust gas temperature is on 200 DEG C of left sides The right side, some are even as high as 300 DEG C.So high exhaust gas temperature not only wastes mass energy, but also causes serious environmental thermal pollution.
In order to rationally utilize resource, boiler afterheat output end often installs heat exchanger, and the heat exchange fin in heat exchanger is to fix Setting, for a long time using will appear scale formation, without being convenient to clean, this leverages heat transfer property, makes waste heat recycling effect Rate is low.
Therefore, invent a kind of boiler afterheat recycling solved the above problems with heat exchange fin it is necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of boiler afterheat recycling heat exchange fins to be inserted by being equipped with slot and inserted link Bar matching insertion slot installs heat exchange fin, and cooperates the first spring to hinder inserted link mobile by pin rod and pin hole, to make to change Hot fin is fixed, and heat exchange fin matches connection with tube body by metal conducting strip, is conducted convenient for heat, and fixed ring passes through through-hole, Heat exchange fin by ball can convenient adjusting position, facilitate installation and removal, be convenient to clean, second spring can make to exchange heat Fin is uniformly distributed, while increasing the contact area with refrigerant, the boiler afterheat rate of recovery is improved, to solve in above-mentioned background technique The problem of proposition.
The purpose of the present invention is to provide following technical solutions: a kind of boiler afterheat recycling heat exchange fin, including tube body, The outer surface of tube body is equipped with slot, is equipped in the slot and is equipped with sliding slot, institute with the matched inserted link of slot, the slot bottom It states and is equipped with pin rod in sliding slot, the first spring is equipped between the pin rod and sliding slot bottom, the inserted link bottom is equipped with and pin rod The pin hole matched, the inserted link side are fixedly connected with support plate, and the support plate surface is equipped with two through-holes, two through-holes It is inside equipped with fixed ring, is equipped with equally distributed several heat exchange fins on the outside of two fixed rings, the heat exchange fin and solid The junction for determining ring is equipped with through-hole, and described heat exchange fin one end is equipped with metal conducting strip, between the metal conducting strip and tube body Equipped with ball, second spring is equipped between two heat exchange fins.
Preferably, the quantity of the tube body is set as multiple, and multiple tube bodies form heat exchange pipe, the heat exchange pipe One end is equipped with air inlet, and the heat exchange pipe other end is equipped with air outlet, and described two tube bodies are connected by U-tube, described to change Hot comb two sides are all provided with there are two symmetrical heat exchange wing plate.
Preferably, by flanged joint, the junction of the tube body and U-tube is equipped with gasket for the tube body and U-tube, The gasket is made of rubber material.
Preferably, the quantity of the slot is set as six, and six slots are evenly distributed on the outside of tube body, described to change Hot fin is slidably connected with fixed ring.
Preferably, the heat exchange fin is from top to bottom set as multilayer, and heat exchange fin described in multilayer is to be arranged in parallel.
Preferably, the pin rod is set as round table-like close to one end of pin hole, and the top of the round table-like pin rod is set as Arc-shaped, slot top two sides are equipped with limited block.
Preferably, the tubular body interlude is equipped with filter screen, and the filter screen is made of metal material, the heat exchange Comb is set as wavy.
Preferably, the metal conducting strip matches with tube wall, and the metal conducting strip is set as thick copper sheet, described Second spring is made of metallic copper material.
Preferably, the heat exchange fin and heat exchange wing plate are made of stainless steel material, the heat exchange fin and heat exchange wing Plate surface is all made of plating palladium processing.
Technical effect and advantage of the invention:
1, by being equipped with slot and inserted link, inserted link is matched into insertion slot, is mounted on heat exchange fin on the outside of tube body, inserted link and inserted The bottom of slot connection, the first spring, which withstands pin rod, makes pin rod be inserted into pin hole, and it is mobile to hinder inserted link, so that heat exchange fin is installed, Heat exchange fin matches connection with tube body by metal conducting strip, conducts convenient for heat, and fixed ring passes through through-hole, and heat exchange fin passes through Ball can convenient adjusting position, facilitate the installation and removal of heat exchange fin, Multi-layer exchanging heat fin is to be arranged in parallel, convenient for clear Manage the scale on heat exchange fin surface, second spring is while even support heat exchange fin, additionally it is possible to conduct heat, increase with it is cold The contact area of matchmaker advantageously ensures that the heat transfer property of heat exchange fin, improves boiler afterheat recovering effect;
2, by being equipped with filter screen, hot wind enters heat exchange pipe from air inlet and heats to tube body, under thermal energy conduction effect, Heat exchange fin and heat exchange wing plate heat refrigerant, rationally utilize boiler afterheat, reduce the wasting of resources, and filter screen intercepts cigarette Dirt prevents tube body from blocking, keep tube body it is unobstructed, while filter screen slow down hot wind by speed, heat exchange pipe is set as wave Shape extends hot wind to the action time of tube body and heat exchange fin, is conducive to improve thermal energy recovery efficiency.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the cross-sectional view of tube body of the present invention.
Fig. 3 is the partial sectional view of sliding slot of the present invention.
Fig. 4 is the portion the A schematic enlarged-scale view of Fig. 1 of the present invention.
Fig. 5 is the main view of heat exchange pipe of the present invention.
In figure: 1 tube body, 2 inserted links, 3 sliding slots, 4 pin rods, 5 first springs, 6 pin holes, 7 support plates, 8 through-holes, 9 fixed rings, 10 Heat exchange fin, 11 metal conducting strips, 12 balls, 13 second springs, 14 heat exchange pipes, 15 air inlets, 16 air outlets, 17 U-shapeds Pipe, 18 heat exchange wing plates, 19 flanges, 20 limited blocks, 21 filter screens.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
A kind of boiler afterheat recycling heat exchange fin according to shown in Fig. 1-4, including tube body 1,1 outer surface of tube body, which is equipped with, inserts Slot, interior be equipped with of the slot are equipped with sliding slot 3, are equipped with pin rod in the sliding slot 3 with the matched inserted link 2 of slot, the slot bottom 4, be equipped with the first spring 5 between 3 bottom of the pin rod 4 and sliding slot, 2 bottom of inserted link be equipped with the matched pin hole 6 of pin rod 4, 2 side of inserted link is fixedly connected with support plate 7, and 7 surface of support plate is set there are two through-hole 8, in two through-holes 8 Equipped with fixed ring 9, be equipped with equally distributed several heat exchange fins 10 on the outside of two fixed rings 9, the heat exchange fin 10 with The junction of fixed ring 9 is equipped with through-hole 8, and described 10 one end of heat exchange fin is equipped with metal conducting strip 11, the metal conducting strip 11 It is equipped with ball 12 between tube body, is equipped with second spring 13 between two heat exchange fins 10;
By being equipped with slot and inserted link 2, inserted link 2 is matched into insertion slot, heat exchange fin 10 is made to be mounted on 1 outside of tube body, inserted link 2 The bottom connecting with slot, the first spring 5, which withstands pin rod 4, makes pin rod 4 be inserted into pin hole 6, hinders inserted link 2 mobile, to make to exchange heat Fin 10 is installed, and heat exchange fin 10 matches connection with tube body 1 by metal conducting strip 11, is conducted convenient for heat, and fixed ring 9 passes through Through-hole 8, heat exchange fin 10 by ball 12 can convenient adjusting position, the installation and removal of convenient heat exchanging fin 10, And Multi-layer exchanging heat fin 10 is to be arranged in parallel, and is convenient to clean the scale on 10 surface of heat exchange fin, second spring 13 is uniformly being propped up While supportting heat exchange fin 10, additionally it is possible to conduct heat, increase the contact area with refrigerant, advantageously ensure that heat exchange fin 10 Heat transfer property improves boiler afterheat recovering effect.
Embodiment 2:
The quantity of the tube body 1 is set as multiple, and multiple tube bodies 1 form heat exchange pipe 14, described 14 one end of heat exchange pipe Equipped with air inlet 15,14 other end of heat exchange pipe is equipped with air outlet 16, and described two tube bodies 1 are connected by U-tube 17, institute It states 14 two sides of heat exchange pipe to be all provided with there are two symmetrical heat exchange wing plate 18, hot wind is right from air inlet 15 into heat exchange pipe 14 Tube body 1 is heated, and under thermal energy conduction effect, heat exchange fin 10 and heat exchange wing plate 18 heat refrigerant, is rationally utilized Boiler afterheat reduces the wasting of resources, and heat exchange pipe 14 extends hot wind action time, to improve waste heat recovery rate;
The tube body 1 is connect with U-tube 17 by flange 19, and the junction of the tube body 1 and U-tube 17 is equipped with gasket, institute It states gasket to be made of rubber material, 19 connection pipe body 1 of flange and U-tube 17 facilitate installation and removal to repair;
The quantity of the slot is set as six, and six slots are evenly distributed on 1 outside of tube body, the heat exchange fin 10 with Fixed ring 9 is slidably connected, and heat exchanging fin 10 is facilitated to carry out even regulation;
The heat exchange fin 10 is from top to bottom set as multilayer, and heat exchange fin 10 described in multilayer is to be arranged in parallel, and is conducive to exchange heat Fin 10 is evenly heated refrigerant, is convenient to clean scale;
The pin rod 4 is set as round table-like close to one end of pin hole 6, and the top of the round table-like pin rod 4 is set as arc-shaped, institute It states two sides at the top of slot and is equipped with limited block 20,6 shape of pin hole matches fixed with pin hole 6 and take out inserted link 2, limits convenient for pin rod 4 Position block 20 facilitates inserted link 2 to position;
The 1 bosom section of tube body is equipped with filter screen 21, and the filter screen 21 is made of metal material, the heat exchange pipe 14 Be set as wavy, filter screen 21, which intercepts flue dust, prevents tube body 1 from blocking, slow down hot wind by speed, extend hot wind to tube body 1 With the action time of heat exchange fin 10, thermal energy recovery efficiency is improved;
The metal conducting strip 11 matches with 1 outer wall of tube body, and the metal conducting strip 11 is set as thick copper sheet, second bullet Spring 13 is made of metallic copper material, and second spring 13 is while even support heat exchange fin 10, additionally it is possible to conduct heat, increase With the contact area of refrigerant;
The heat exchange fin 10 and heat exchange wing plate 18 are made of stainless steel material, and stainless steel material is corrosion-resistant, and heat-transfer effect is good Good, the heat exchange fin 10 and heat exchange 18 surface of wing plate are all made of plating palladium processing, improve hot fin 10 and the resistance to of wing plate 18 that exchange heat Corrosivity.
Working principle of the present invention:
Referring to Figure of description 1-4, inserted link 2 is matched into insertion slot, heat exchange fin 10 is made to be mounted on 1 outside of tube body, inserted link 2 with The bottom of slot connection, the first spring 5, which withstands pin rod 4, makes pin rod 4 be inserted into pin hole 6, hinders inserted link 2 mobile, to make heat exchange wing Piece 10 is installed, and heat exchange fin 10 matches connection with tube body 1 by metal conducting strip 11, is conducted convenient for heat, and fixed ring 9 passes through logical Hole 8, heat exchange fin 10 by ball 12 can convenient adjusting position, the installation and removal of convenient heat exchanging fin 10, and And Multi-layer exchanging heat fin 10 is to be arranged in parallel, and is convenient to clean the scale on 10 surface of heat exchange fin, second spring 13 is in even support While heat exchange fin 10, additionally it is possible to conduct heat, increase the contact area with refrigerant, advantageously ensure that the biography of heat exchange fin 10 Hot property improves boiler afterheat recovering effect;
Referring to Figure of description 2 and 5, hot wind heats tube body 1 from air inlet 15 into heat exchange pipe 14, in thermal energy conduction Under effect, heat exchange fin 10 and heat exchange wing plate 18 heat refrigerant, rationally utilize boiler afterheat, reduce the wasting of resources, mistake Strainer 21 intercept flue dust, prevent tube body 1 block, keep tube body 1 it is unobstructed, while filter screen 21 slow down hot wind by speed, change Hot comb 14 is set as wavy, extends hot wind to the action time of tube body 1 and heat exchange fin 10, is conducive to improve thermal energy recycling Efficiency.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (9)

1. a kind of boiler afterheat recycling heat exchange fin, including tube body (1), it is characterised in that: tube body (1) outer surface is equipped with Slot, interior be equipped with of the slot is equipped with sliding slot (3) with the matched inserted link of slot (2), the slot bottom, in the sliding slot (3) Equipped with pin rod (4), between the pin rod (4) and sliding slot (3) bottom be equipped with the first spring (5), inserted link (2) bottom be equipped with Pin rod (4) matched pin hole (6), inserted link (2) side are fixedly connected with support plate (7), and support plate (7) surface is equipped with Two through-holes (8), two through-holes (8) are interior to be equipped with fixed ring (9), is equipped on the outside of two fixed rings (9) and is uniformly divided Several heat exchange fins (10) of cloth, the heat exchange fin (10) and the junction of fixed ring (9) are equipped with through-hole (8), the heat exchange Fin (10) one end is equipped with metal conducting strip (11), is equipped with ball (12) between the metal conducting strip (11) and tube body, and two Second spring (13) are equipped between the heat exchange fin (10).
2. a kind of boiler afterheat recycling heat exchange fin according to claim 1, it is characterised in that: the tube body (1) Quantity is set as multiple, and multiple tube body (1) compositions heat exchange pipe (14), described heat exchange pipe (14) one end is equipped with air inlet (15), heat exchange pipe (14) other end is equipped with air outlet (16), and described two tube bodies (1) are connected by U-tube (17), institute Heat exchange pipe (14) two sides are stated to be all provided with there are two symmetrical heat exchange wing plate (18).
3. a kind of boiler afterheat recycling heat exchange fin according to claim 2, it is characterised in that: the tube body (1) and U Shape pipe (17) is connected by flange (19), and the junction of the tube body (1) and U-tube (17) is equipped with gasket, the gasket It is made of rubber material.
4. a kind of boiler afterheat recycling heat exchange fin according to claim 1, it is characterised in that: the quantity of the slot Six are set as, six slots are evenly distributed on the outside of tube body (1), and the heat exchange fin (10) and fixed ring (9) are slided Connection.
5. a kind of boiler afterheat recycling heat exchange fin according to claim 1, it is characterised in that: the heat exchange fin (10) it is from top to bottom set as multilayer, heat exchange fin described in multilayer (10) is to be arranged in parallel.
6. a kind of boiler afterheat recycling heat exchange fin according to claim 1, it is characterised in that: the pin rod (4) is leaned on One end of nearly pin hole (6) is set as round table-like, and the top of the round table-like pin rod (4) is set as arc-shaped, the slot top Two sides are equipped with limited block (20).
7. a kind of boiler afterheat recycling heat exchange fin according to claim 2, it is characterised in that: in the tube body (1) Portion's interlude is equipped with filter screen (21), and the filter screen (21) is made of metal material, and the heat exchange pipe (14) is set as wave Wave-like.
8. a kind of boiler afterheat recycling heat exchange fin according to claim 1, it is characterised in that: the metal conducting strip (11) match with tube body (1) outer wall, the metal conducting strip (11) is set as thick copper sheet, and the second spring (13) is by metal Copper product is made.
9. a kind of boiler afterheat recycling heat exchange fin according to claim 2, it is characterised in that: the heat exchange fin (10) it is made with heat exchange wing plate (18) of stainless steel material, the heat exchange fin (10) and heat exchange wing plate (18) surface are all made of Plate palladium processing.
CN201811342993.5A 2018-11-13 2018-11-13 Heat exchange fin is used in a kind of recycling of boiler afterheat Pending CN109405622A (en)

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CN201811342993.5A CN109405622A (en) 2018-11-13 2018-11-13 Heat exchange fin is used in a kind of recycling of boiler afterheat

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Application Number Priority Date Filing Date Title
CN201811342993.5A CN109405622A (en) 2018-11-13 2018-11-13 Heat exchange fin is used in a kind of recycling of boiler afterheat

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Publication Number Publication Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111381009A (en) * 2020-05-08 2020-07-07 杭州能尔科技有限公司 Detection sensor adjusting mechanism for air pollution detection equipment
CN111561834A (en) * 2020-06-02 2020-08-21 江阴博圣热能科技有限公司 Laser welding finned tube and production process thereof
CN112815522A (en) * 2021-01-20 2021-05-18 广东超人节能厨卫电器有限公司 Heat exchange device and gas water heater
CN114508783A (en) * 2022-02-24 2022-05-17 浙江惠文美炉具有限公司 Heating and smoke exhausting fitting for open stove in tent and stove set

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CN103712505A (en) * 2013-12-27 2014-04-09 无锡佳龙换热器制造有限公司 Fin of heat exchanger
CN104819655A (en) * 2015-05-11 2015-08-05 江苏银奕达铝业有限公司 Novel sunflower radiator
CN105257978A (en) * 2015-07-02 2016-01-20 浙江海洋学院 Liquefied natural gas gasifier with fixedly connected retractable outer heat exchange fins and detachably connected inner heat exchange fins
CN204987993U (en) * 2015-05-11 2016-01-20 江苏银奕达铝业有限公司 Novel sun flower radiator
CN106016753A (en) * 2016-06-28 2016-10-12 哈尔滨市金京锅炉有限公司 Heat collecting tube for household boiler
CN205878978U (en) * 2016-07-04 2017-01-11 山西省交通科学研究院 Compound single water course radiator of copper aluminium
CN107198513A (en) * 2017-06-27 2017-09-26 姚洁 Hospital bed side patient monitor
CN107388875A (en) * 2017-06-27 2017-11-24 太仓陶氏电气有限公司 A kind of tubular type radiating fin sliding radiator
CN209326442U (en) * 2018-11-13 2019-08-30 吴恒峰 Heat exchange fin is used in a kind of recycling of boiler afterheat

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712505A (en) * 2013-12-27 2014-04-09 无锡佳龙换热器制造有限公司 Fin of heat exchanger
CN104819655A (en) * 2015-05-11 2015-08-05 江苏银奕达铝业有限公司 Novel sunflower radiator
CN204987993U (en) * 2015-05-11 2016-01-20 江苏银奕达铝业有限公司 Novel sun flower radiator
CN105257978A (en) * 2015-07-02 2016-01-20 浙江海洋学院 Liquefied natural gas gasifier with fixedly connected retractable outer heat exchange fins and detachably connected inner heat exchange fins
CN106016753A (en) * 2016-06-28 2016-10-12 哈尔滨市金京锅炉有限公司 Heat collecting tube for household boiler
CN205878978U (en) * 2016-07-04 2017-01-11 山西省交通科学研究院 Compound single water course radiator of copper aluminium
CN107198513A (en) * 2017-06-27 2017-09-26 姚洁 Hospital bed side patient monitor
CN107388875A (en) * 2017-06-27 2017-11-24 太仓陶氏电气有限公司 A kind of tubular type radiating fin sliding radiator
CN209326442U (en) * 2018-11-13 2019-08-30 吴恒峰 Heat exchange fin is used in a kind of recycling of boiler afterheat

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111381009A (en) * 2020-05-08 2020-07-07 杭州能尔科技有限公司 Detection sensor adjusting mechanism for air pollution detection equipment
CN111561834A (en) * 2020-06-02 2020-08-21 江阴博圣热能科技有限公司 Laser welding finned tube and production process thereof
CN112815522A (en) * 2021-01-20 2021-05-18 广东超人节能厨卫电器有限公司 Heat exchange device and gas water heater
CN114508783A (en) * 2022-02-24 2022-05-17 浙江惠文美炉具有限公司 Heating and smoke exhausting fitting for open stove in tent and stove set
CN114508783B (en) * 2022-02-24 2023-07-18 浙江惠文美炉具有限公司 Heating smoke exhaust fitting for tent internal open type stove and stove set

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Application publication date: 20190301

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