CN105698387A - Annular heat exchanger of gas full premix condensation type wall-hanging stove - Google Patents
Annular heat exchanger of gas full premix condensation type wall-hanging stove Download PDFInfo
- Publication number
- CN105698387A CN105698387A CN201610228089.6A CN201610228089A CN105698387A CN 105698387 A CN105698387 A CN 105698387A CN 201610228089 A CN201610228089 A CN 201610228089A CN 105698387 A CN105698387 A CN 105698387A
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- China
- Prior art keywords
- heat exchanger
- annular
- pipe
- heat exchange
- water
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- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/006—Means for removing condensate from the heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- 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
- F28F1/24—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 transversely
- F28F1/32—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 transversely the means having portions engaging further tubular elements
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention discloses an annular heat exchanger of a gas full premix condensation type wall-hanging stove. The annular heat exchanger is characterized in that the annular heat exchanger comprises a shell, an annular distributive pipe, an annular collecting pipe and a plurality of water pipes, wherein the annular distributive pipe and the annular collecting pipe are arranged in the shell; a gap is reserved between the shell and the annular distributive pipe, and a gap is reserved between the shell and the annular collecting pipe; the multiple water pipes are connected between the annular distributive pipe and the annular collecting pipe; a heat exchange cavity is defined by all the water pipes, the annular distributive pipe and the annular collecting pipe; and a heat insulating plate used for dividing the upper part and the lower part of the heat exchange cavity into a primary heat exchanger body and a secondary exchanger body is arranged in the middles of the water pipes. The novel annular heat exchanger provided by the invention is especially suitable for the gas full premix condensation type wall-hanging stove and is different from Giannoni heat exchangers and Bekaert heat exchangers, control of foreign condensation heat exchangers over the Chinese condensation furnace market is broken, the effects of domestic producing and manufacturing, cost reduction and performance improvement are achieved, and the annular heat exchanger is initiated in the industry.
Description
Technical field
The present invention relates to technical field of heat exchangers, particularly relate to a kind of circular heat exchanger being applicable to combustion gas full pre-mix condensing wall-hung boiler (comprising warm bath dual-purpose stove or single radiator)。
Background technology
The full premixed condensed wall-hung boiler of combustion gas (comprises warm bath dual-purpose stove or single radiator, hereinafter referred to as condensing furnace) it is the high-end product in domestic gas boiler, but the market share of 5% is only occupied in China, other 95% are all plain cylindrical furnace (i.e. non-condensing atmospheric gas boilers), and domestic boiler market, Europe, 95% is above full premixed condensed stove。The reason that Chinese and Western difference is huge, one of them is exactly the condensing furnace domestic boiler product as most significant end, the manufacturer of China does not research and develop and grasps core technology, such as heat exchanger, burner, gas valve, blower fan, these core components all rest in European enterprise, and China to research and develop condensing furnace, necessary these original fittings of import, price is high, causes that condensing furnace cost high price is high, it is impossible to accept for Chinese Consumer's。Because there is no core technology, limit the development of condensing furnace。
Condensing furnace heat exchanger as one of core technology, current European market is mainly monopolized by the heat exchanger of two kinds of forms, a kind of be representative with Giannoni producer stainless steel disc tubular type condensate and heat exchanger, another kind is with the Bekaert casting sial integral type condensate and heat exchanger being representative。And how to break the monopolization to the heat exchanger of the full premixed condensed wall-hung boiler of combustion gas of the above-mentioned Liang Jia enterprise, it is achieved domestic production manufacture, accelerating the universal of condensing furnace is fire the technical problem that hot industry is urgently to be resolved hurrily。
Summary of the invention
It is an object of the invention to provide a kind of suitable in the full premixed condensed wall-hung boiler of combustion gas, low cost of manufacture, good effect of heat exchange, be easy to condensation water collection discharge circular heat exchanger。
For reaching object above, the present invention adopts the following technical scheme that。
A kind of combustion gas full pre-mix condensing warms up the circular heat exchanger of bath dual-purpose stove, it is characterized in that, including: housing, be arranged in housing and and housing between stay spaced annular distributive pipe, annular collector pipe, it is connected to the some water pipes between annular distributive pipe, annular collector pipe, each water pipe surrounds heat exchanging chamber jointly with annular distributive pipe, annular collector pipe, is provided with the thermal insulation board that the upper and lower part of heat exchanging chamber is divided into a heat exchanger and secondary heat exchanger at the middle part of water pipe。
As with improvement, being provided with heat exchange fin on water pipe, described heat exchange fin is single circulus or described heat exchange fin is the circulus that some arc-like sheets are spliced。
As with improvement, described heat exchange fin is burnishing surface or is provided with convex closure, bridge plate or bending plate thereon。
As with improvement, a described heat exchanger and secondary heat exchanger are separate structure, and described water pipe is formed by connecting with the downcomer being positioned at secondary heat exchanger by the upper hose being positioned at a heat exchanger；Be provided with upper sealing panel in the bottom of a heat exchanger, the lower end of described upper hose is connected with upper sealing panel, and described thermal insulation board is arranged on upper sealing panel；Be provided with lower seal plate at the top of secondary heat exchanger, the upper end of described downcomer is connected with lower seal plate。
As with improvement, annular distributive pipe being provided with condensation water collection dish。
As with improvement, described condensation water collection dish is that noose holds hollow ring dish on water pipe and by annular distributive pipe, and hollow ring dish by edge to middle downward-sloping。
As with improvement, described housing is surrounded by upper sealing plate, lower shrouding and two blocks of side plates, is provided with burner and installs connector, be provided with outlet flue on lower shrouding on upper sealing plate。
As with improvement, between upper sealing plate and side plate, being provided with sealing gasket between lower shrouding and side plate。
As with improvement, being provided with smoke evacuation joint in the bottom of heat exchanger, the smoke inlet of smoke evacuation joint is connected with the outlet flue on lower shrouding, is provided with condensate water discharging mouth in the bottom of smoke evacuation joint。
As with improvement, the weldment of a described heat exchanger and/or secondary heat exchanger adopts rustless steel or copper to become。
The invention has the beneficial effects as follows:
The annular condensate and heat exchanger that patent of the present invention provides is particularly well-suited to combustion gas full pre-mix condensing wall-hung boiler, it it is the New Ring-like Type heat exchanger being different from Giannoni heat exchanger and Bekaert heat exchanger, the control to China condensing furnace market of the foreign capitals condensate and heat exchanger will be broken, realize domestic production manufacture, reduce cost, improve performance, be in industry pioneering。
Accompanying drawing explanation
Fig. 1 show circular heat exchanger structural representation provided by the invention。
Fig. 2 show the combinative structure schematic diagram of heat exchanger, secondary heat exchanger。
Fig. 3-Fig. 7 show the structural representation of heat exchange fin。
Fig. 8 show the structural representation of a heat exchanger。
Fig. 9 show the structural representation of secondary heat exchanger。
Figure 10 show circular heat exchanger operating diagram (in figure, arrow represents flue gas flow direction) provided by the invention。
Description of reference numerals:
1: housing, 2: annular distributive pipe, 3: annular collector pipe, 4: water pipe, 5: thermal insulation board, 6: water supply connector, 7: water out adapter, 8: upper sealing plate, 9: sealing ring, 10: lower shrouding, 11: sealing gasket, 12: smoke exhaust pipe joint, 13: upper sealing panel, 14: lower seal plate, 15: heat exchange fin, 16: condensation water collection dish。
2-1: upper hose, 2-2: downcomer。
15-1: convex closure, 15-2: bridge plate, 15-3: bending plate。
Detailed description of the invention
It is more fully understood that the essence of the present invention for convenience of those skilled in the art, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail。
As shown in Figure 1 and Figure 2, a kind of circular heat exchanger of combustion gas full pre-mix condensing wall-hung boiler, including: housing 1, be arranged in housing 1 and and housing 1 between stay spaced annular distributive pipe 2, annular collector pipe 3, it is connected to the some water pipes 4 between annular distributive pipe 2, annular collector pipe 3, each water pipe 4 surrounds heat exchanging chamber jointly with annular distributive pipe 2, annular collector pipe 3, is provided with the thermal insulation board 5 that the upper and lower part of heat exchanging chamber is divided into a heat exchanger and secondary heat exchanger at the middle part of water pipe 4。
Wherein, described housing 1 welds with two semicolumn corrosion resistant plates, forms the barrel-shaped appearance of complete column；External two waterway connectors, namely bottom is cold water water supply connector 6, and top is high-temperature water water out adapter 7。Two waterway connectors there is temperature sensor installing port respectively。Heat exchanger top is upper sealing plate 8 and sealing ring 9, and upper sealing plate 8 is used for installing burner；Bottom is lower shrouding 10 and sealing gasket 11, and lower shrouding 10 is used for receiving, collecting condensed water, it is simple to uniform effluent。Bottommost is a smoke exhaust pipe joint 12, for connecting smoke exhaust pipe outside heat exchanger and for discharging condensed water。
Being provided with some heat exchange fins 15 on water pipe 2, the spacing of each heat exchange fin 15 is identical, and quantity can be determined according to the needs of heat exchange power。Described heat exchange fin 15 is the circulus that some arc-like sheets are spliced for single circulus or described heat exchange fin 15。According to different heat exchange demands, heat exchange fin 15 is for flat surface or is provided with convex closure 15-1, bridge plate 15-2 or bending plate 15-3 on heat exchange fin 15；As shown in Fig. 3-Fig. 7。
Shown in Fig. 8, Fig. 9, a described heat exchanger and secondary heat exchanger are separate structure, and described water pipe is formed by connecting by the upper hose 2-1 and the downcomer 2-2 being positioned at secondary heat exchanger being positioned at a heat exchanger；Be provided with upper sealing panel 13 in the bottom of a heat exchanger, the lower end of described upper water 2-1 is connected with upper sealing panel 13, and described thermal insulation board 5 is arranged on the upper of upper sealing panel 13；Be provided with lower seal plate 14 at the top of secondary heat exchanger, the upper end of described downcomer 2-2 is connected with lower seal plate 14。
As shown in Figure 8, the top of heat exchanger is annular collector pipe 3, it is welded with the upper hose 2-1 of some (being 8 on schematic diagram) above, upper hose 2-1 can place spring as required or have effigurate stainless steel substrates, make the current in upper hose 2-1 form turbulent flow, strengthen heat transfer effect。The material of annular collector pipe 3 and upper hose 2-1 is probably copper or rustless steel。
Heat exchange fin 15 is socketed in each upper hose 2-1, and is soldered。Annular collector pipe 3, upper hose 2-1 and heat exchange fin 15 are welded as a whole, and form heat exchange fin weldment。Heat exchanger bottom is high temperature resistant heat insulation plate 5, in order to will once, secondary heat exchanger be divided into two subregions of high/low temperature。If but had other thermal insulation board between two heat exchangers, could also without thermal insulation board on a heat exchanger。
The bottom of thermal insulation board 5 is rustless steel upper sealing panel 13, further will once, secondary heat exchanger be divided into two cavitys, increase the intensity of whole heat exchanger simultaneously。
After one time heat exchanger assembly assembles, the straight tube exposing upper sealing panel 13 part will be increased diameter by tube expansion, in order to the downcomer 2-2 on secondary heat exchanger to slotting connection。It is of course also possible to by the downcomer 2-2 tube expansion once major diameter on secondary heat exchanger, a Straight Pipes of Heat Exchanger not tube expansion, equally possible realization is to slotting connection。
As shown in Figure 9, the bottom of secondary heat exchanger is annular distributive pipe 2, it is welded with the downcomer 2-2 of some (being 8 on schematic diagram) above, downcomer 2-2 can place spring as required or have effigurate stainless steel substrates, make the current in downcomer 2-2 form turbulent flow, strengthen heat transfer effect。The material of annular distributive pipe 2 and downcomer 2-2 is rustless steel。
Secondary heat exchanger, near the bottommost of annular distributive pipe 2, is a condensation water collection dish 16。Collect the condensed water condensing generation after high-temperature flue gas is cooled。
Heat exchange fin 15 is socketed in the downcomer 2-2 of each branch road, and is soldered。Heat exchange fin 15 top is rustless steel lower seal plate 14, further will once, secondary heat exchanger be divided into two cavitys, increase the intensity of whole heat exchanger simultaneously。
Annular distributive pipe 2, downcomer 2-2, condensation water collection dish 16, heat exchange fin 15 and lower seal plate 14 are welded as a whole, and form whole secondary heat exchanger assembly。
In heat exchanger, water is divided into a number of branch road (schematic diagram Shang Shi 8 branch) after entering annular distributive pipe 2, enters in annular collector pipe 3, flow out from the water out adapter of annular collector pipe 3 after collecting after heated。
As shown in Figure 10, the heat exchanger of a kind of combustion gas full pre-mix condensing wall-hung boiler that the present embodiment provides, its top is combustion chamber, combustion gas produces high-temperature flue gas after combustion chamber burns, the heat exchange between high-temperature flue gas and water at low temperature is realized by the heat exchange fin in this heat exchanger, water at low temperature is heated to the high-temperature water of uniform temperature, automatically collects the condensed water produced after high-temperature flue-gas reduces simultaneously, it is prevented that corrosive condensed water elimination, be leaked to outside boiler, cause environmental pollution。
During work, the high-temperature flue gas (pressing arrow to flow to) that burning produces, spread to the direction of surrounding 360 °, flow through from the gap between a heat exchanger heat exchange fin, then walk downwards from the gap between a heat exchanger heat exchange fin and shell, then flow through gap between secondary heat exchanger heat exchange fin from the direction of surrounding 360 °, be pooled to the middle and lower part of heat exchanger, after condensation water collection dish 16, the exhaust opening again through smoke exhaust pipe joint 12 is discharged into outside heat exchanger。And water at low temperature enters heat exchanger from the water supply connector 6 of bottom, annular distributive pipe 2 through heat exchanger bottom taps, each road water flows separately through the water pipe being welded in secondary heat exchanger heat exchange fin and a heat exchanger heat exchange fin, it is aggregated into the annular collector pipe 3 on top after heated, finally flows out from water out adapter 7。
By above description, high-temperature flue gas, after flowing through first and second heat exchange fin, heats water at low temperature by heat exchange fin, and flue-gas temperature reduces, and is condensed and discharges condensed water, it is achieved heat the purpose of water at low temperature, offer high-temperature water。And the condensed water that flue gas produces, the water catch tray that is condensed collects collection, and unification is discharged into boiler exterior from condensed water interface, and cooled flue gas becomes low-temperature flue gas, is discharged into boiler exterior by exhaust opening, and the discharge of good effect of heat exchange, condensation water collection is convenient。
The essence of the present invention has been described in detail by above detailed description of the invention, but with this, protection scope of the present invention can not be limited。It should be evident that under the enlightenment of essence of the present invention, the art those of ordinary skill also can carry out many improvement and modification, it should be noted that these improve and modify within the claims all dropping on the present invention。
Claims (10)
1. the circular heat exchanger of a combustion gas full pre-mix condensing wall-hung boiler, it is characterized in that, including: housing, be arranged in housing and and housing between stay spaced annular distributive pipe, annular collector pipe, it is connected to the some water pipes between annular distributive pipe, annular collector pipe, each water pipe surrounds heat exchanging chamber jointly with annular distributive pipe, annular collector pipe, is provided with the thermal insulation board that the upper and lower part of heat exchanging chamber is divided into a heat exchanger and secondary heat exchanger at the middle part of water pipe。
2. circular heat exchanger according to claim 1, it is characterised in that be provided with heat exchange fin on water pipe, described heat exchange fin is single circulus or described heat exchange fin is the circulus that some arc-like sheets are spliced。
3. circular heat exchanger according to claim 2, it is characterised in that described heat exchange fin is flat surface or is provided with convex closure, bridge plate or bending plate on heat exchange fin。
4. circular heat exchanger according to claim 1, it is characterised in that a described heat exchanger and secondary heat exchanger are separate structure, described water pipe is formed by connecting with the downcomer being positioned at secondary heat exchanger by the upper hose being positioned at a heat exchanger；Be provided with upper sealing panel in the bottom of a heat exchanger, the lower end of described upper hose is connected with upper sealing panel, and described thermal insulation board is arranged on upper sealing panel；Be provided with lower seal plate at the top of secondary heat exchanger, the upper end of described downcomer is connected with lower seal plate。
5. the circular heat exchanger according to claim 1 or 4, it is characterised in that be provided with condensation water collection dish on annular distributive pipe。
6. circular heat exchanger according to claim 5, it is characterised in that described condensation water collection dish is that noose holds hollow ring dish on water pipe and by annular distributive pipe, and hollow ring dish by edge to middle downward-sloping。
7. circular heat exchanger according to claim 1, it is characterised in that described housing is surrounded by upper sealing plate, lower shrouding and two blocks of side plates, is provided with burner on upper sealing plate and installs connector, be provided with outlet flue on lower shrouding。
8. circular heat exchanger according to claim 7, it is characterised in that between upper sealing plate and side plate, be provided with sealing gasket between lower shrouding and side plate。
9. circular heat exchanger according to claim 7, it is characterised in that be provided with smoke evacuation joint in the bottom of heat exchanger, the smoke inlet of smoke evacuation joint is connected with the outlet flue on lower shrouding, is provided with condensate water discharging mouth in the bottom of smoke evacuation joint。
10. circular heat exchanger according to claim 1, it is characterised in that the weldment of a described heat exchanger and/or secondary heat exchanger adopts rustless steel or copper to become。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228089.6A CN105698387A (en) | 2016-04-12 | 2016-04-12 | Annular heat exchanger of gas full premix condensation type wall-hanging stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228089.6A CN105698387A (en) | 2016-04-12 | 2016-04-12 | Annular heat exchanger of gas full premix condensation type wall-hanging stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105698387A true CN105698387A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610228089.6A Pending CN105698387A (en) | 2016-04-12 | 2016-04-12 | Annular heat exchanger of gas full premix condensation type wall-hanging stove |
Country Status (1)
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| CN (1) | CN105698387A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322765A (en) * | 2016-11-09 | 2017-01-11 | 河南省健泰实业有限公司 | Heat exchanger for fully premixed condensing wall-hanging stove |
| CN108397909A (en) * | 2018-05-10 | 2018-08-14 | 宁波市哈雷换热设备有限公司 | A kind of novel full pre-mix condensing heat-exchanger rig |
| CN109855437A (en) * | 2019-03-07 | 2019-06-07 | 成都双流积利热能科技股份有限公司 | A kind of condensate and heat exchanger |
| CN110822714A (en) * | 2019-11-01 | 2020-02-21 | 西安交通大学 | Gas condensing boiler with narrow-gap combustion and heat exchange |
| CN114234677A (en) * | 2021-12-25 | 2022-03-25 | 阿诗丹顿燃具有限公司 | Heat exchanger for gas heating furnace adopting full-premixing combustion mode |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322765A (en) * | 2016-11-09 | 2017-01-11 | 河南省健泰实业有限公司 | Heat exchanger for fully premixed condensing wall-hanging stove |
| CN108397909A (en) * | 2018-05-10 | 2018-08-14 | 宁波市哈雷换热设备有限公司 | A kind of novel full pre-mix condensing heat-exchanger rig |
| CN109855437A (en) * | 2019-03-07 | 2019-06-07 | 成都双流积利热能科技股份有限公司 | A kind of condensate and heat exchanger |
| CN110822714A (en) * | 2019-11-01 | 2020-02-21 | 西安交通大学 | Gas condensing boiler with narrow-gap combustion and heat exchange |
| CN110822714B (en) * | 2019-11-01 | 2020-10-30 | 西安交通大学 | Gas condensing boiler with narrow-gap combustion and heat exchange |
| CN114234677A (en) * | 2021-12-25 | 2022-03-25 | 阿诗丹顿燃具有限公司 | Heat exchanger for gas heating furnace adopting full-premixing combustion mode |
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Application publication date: 20160622 |