CN204478503U - The stainless heat exchanger of gas water heater or wall-hung boiler - Google Patents
The stainless heat exchanger of gas water heater or wall-hung boiler Download PDFInfo
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- CN204478503U CN204478503U CN201520104962.1U CN201520104962U CN204478503U CN 204478503 U CN204478503 U CN 204478503U CN 201520104962 U CN201520104962 U CN 201520104962U CN 204478503 U CN204478503 U CN 204478503U
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- Prior art keywords
- heat
- conducting plate
- sidewall
- frame
- transferring pipe
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Abstract
The application discloses the stainless heat exchanger of a kind of gas water heater or wall-hung boiler, and it comprises: by sidewall surround there is hollow cavity enclose frame, described in enclose frame have back to first end and the second end; Described first end is high-temperature flue gas inlet end; Described second end is for connecting discharge flue; The described frame that encloses is provided with at least one cooling heat transferring pipe; Described sidewall predetermined position is provided with at least one heat-conducting plate, described heat-conducting plate and described cooling heat transferring pipe or described in enclose frame and be connected with the connecting portion of described cooling heat transferring pipe.Part or all of described sidewall and described high-temperature flue gas separate by described heat-conducting plate.Described frame inside of enclosing is provided with fin, and described sidewall predetermined position is contact described sidewall sections corresponding to the fin of high-temperature flue gas at first, and described heat-conducting plate connects the fin contacting high-temperature flue gas at first.A kind of gas water heater that the application provides or the stainless heat exchanger of wall-hung boiler can make the sidewall of stainless heat exchanger not easily cracks.
Description
Technical field
The application relates to a kind of gas combustion apparatus, particularly relates to the stainless heat exchanger of a kind of gas water heater or wall-hung boiler.
Background technology
Existing stainless steel hot hydrophone comprises the heat exchanger assembly be made up of framework, main heat exchanger and condensing heat exchanger, wherein, main heat exchanger and condensing heat exchanger all have stainless steel to make, described main heat exchanger and condensing heat exchanger integrally welded along the exhaust gases passes of flow of flue gas direction and described framework, form described heat exchanger assembly, between described main heat exchanger and condensing heat exchanger, be provided with condensed-water collection device.
Above-mentioned stainless steel hot hydrophone in use for some time, easily there is crackle in the sidewall of described heat exchanger assembly, affects the normal service life of whole water heater.
Utility model content
Inventor of the present utility model finds through the test reaching 2 years, in the use procedure of stainless steel hot hydrophone, the sidewall of described heat exchanger assembly can form high-temperature region, described high-temperature region is when burner combustion state and burner stop burning, the temperature difference that this region experiences is comparatively large, closely causes crackle mainly to concentrate on high-temperature region.
In view of above-mentioned defect and the above discovery of prior art, the application provides the stainless heat exchanger of a kind of gas water heater or wall-hung boiler, to make the sidewall of stainless heat exchanger not easily cracks.
For achieving the above object, the application provides the stainless heat exchanger of a kind of gas water heater or wall-hung boiler, and it comprises:
By sidewall surround there is hollow cavity enclose frame, described in enclose frame have back to first end and the second end; Described first end is high-temperature flue gas inlet end; Described second end is for connecting discharge flue;
The described frame that encloses is provided with at least one cooling heat transferring pipe;
Described sidewall predetermined position is provided with at least one heat-conducting plate, described heat-conducting plate and described cooling heat transferring pipe or described in enclose frame and be connected with the connecting portion of described cooling heat transferring pipe.
Preferably, part or all of described sidewall and described high-temperature flue gas separate by described heat-conducting plate.
Preferably, described in enclose frame inside and be provided with fin, described sidewall predetermined position is contact described sidewall sections corresponding to the fin of high-temperature flue gas at first, and described heat-conducting plate connects the fin contacting high-temperature flue gas at first.
Preferably, described heat-conducting plate one end is connected with described sidewall, the other end and described cooling heat transferring pipe or described in enclose frame and be connected with the connecting portion of described cooling heat transferring pipe.
Preferably, there is gap between described heat-conducting plate and described sidewall.
Preferably, described sidewall predetermined position near described in enclose the sidewall sections of frame first end.
Preferably, described in described heat-conducting plate is positioned at, enclose the inner surface of frame, described heat-conducting plate from described cooling heat transferring pipe or described in enclose the connecting portion of frame and described cooling heat transferring pipe connecting portion extend to described direction of enclosing frame first end place.
Preferably, described heat-conducting plate encloses the first end of frame with described or be connected near the position of described first end.
Preferably, described cooling heat transferring pipe be located at described in enclose outside frame.
Preferably, described in enclose frame and described cooling heat transferring pipe connecting portion be provided with groove, described cooling heat transferring pipe is positioned at described groove.
Preferably, described cooling heat transferring pipe be located at described in enclose inside frame, described heat-conducting plate is connected with described cooling heat transferring pipe.
Preferably, described heat-conducting plate and described sidewall are that line is connected or face connects.
Preferably, described heat-conducting plate and described sidewall weld are fixed.
Preferably, described heat-conducting plate is positioned at the outer surface of described sidewall, and one end of described heat-conducting plate is connected with cooling heat transferring pipe, and the other end of described heat-conducting plate is connected with first end or near the position of described first end.
By describing above and can finding out, the application arranges heat-conducting plate at the predetermined position of described sidewall, and described heat-conducting plate is connected with cooling heat transferring pipe or near the sidewall of described cooling heat transferring pipe, make described heat-conducting plate the heat of described sidewall predetermined position can be passed to cooling heat transferring pipe, and then the maximum temperature of predetermined position on described sidewall when effectively reducing water heater working, so the stainless heat exchanger of the gas water heater provided by the application or wall-hung boiler can make the sidewall of stainless heat exchanger not easily cracks.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the stainless heat exchanger overall schematic of the gas water heater that provides of a kind of embodiment of the application or wall-hung boiler;
Fig. 2 is the A-A place sectional view of stainless heat exchanger shown in Fig. 1 of providing of the application's embodiment;
Fig. 3 is the A-A place sectional view of stainless heat exchanger shown in Fig. 1 of providing of the application's embodiment;
Fig. 4 is the A-A place sectional view of stainless heat exchanger shown in Fig. 1 of providing of the application's embodiment;
Fig. 5 is the A-A place sectional view of stainless heat exchanger shown in Fig. 1 of providing of the application's embodiment.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the utility model protection.
Inventor of the present utility model finds through the test reaching 2 years, in the use procedure of stainless steel hot hydrophone, the sidewall 1 of described heat exchanger assembly can form high-temperature region, described high-temperature region is when burner combustion state and burner stop burning, the temperature difference that this region experiences is comparatively large, closely causes crackle mainly to concentrate on high-temperature region.
Based on above-mentioned discovery, please refer to Fig. 1 to Fig. 5, the stainless heat exchanger of a kind of gas water heater that a kind of embodiment of the application provides or wall-hung boiler as shown in the figure, this stainless steel hot hydrophone comprises: by sidewall 1 surround there is hollow cavity enclose frame, described in enclose frame have back to first end 2 and the second end 3; Described first end 2 is high-temperature flue gas inlet end; Described second end 3 is for connecting discharge flue 100; The described frame that encloses is provided with at least one cooling heat transferring pipe 6; Described sidewall 1 predetermined position is provided with at least one heat-conducting plate 4, described heat-conducting plate 4 and described cooling heat transferring pipe 6 or described in enclose frame and be connected with the connecting portion 13 of described cooling heat transferring pipe 6.
Burner and described first end 2 are installed and is connected and is connected by discharge flue 100 described second end 3 and form gas water heater or wall-hung boiler, when using described gas water heater or wall-hung boiler, by gas supply to described burner, described burner combustion also produces high-temperature flue gas in combustion, the described sidewall 1 enclosing frame can form high-temperature region, described sidewall predetermined position can be described high-temperature region, because described sidewall predetermined position is provided with described heat-conducting plate 4, the partial heat of described high-temperature region can be passed to described cooling heat transferring pipe 6 by described heat-conducting plate 4, reduce the maximum temperature of high-temperature region, make burner when the state of lighting and burner stop burning, the temperature difference that described sidewall predetermined position experiences reduces, and then the sidewall 1 of this position is not easily cracked.
By describing above and can finding out, present embodiment arranges heat-conducting plate 4 on the described sidewall 1 enclosing frame, and the position described heat-conducting plate 4 is arranged on based on described sidewall 1 producing high-temperature region, and then by the conductive force of described heat-conducting plate 4, the heat of described high-temperature region is made to pass to cooling heat transferring pipe 6 by heat-conducting plate 4, and then the maximum temperature of the high-temperature region of described sidewall 1 when effectively reducing water heater working, so the stainless heat exchanger of the gas water heater provided by present embodiment or wall-hung boiler can make the sidewall 1 of stainless heat exchanger not easily cracks.
Incorporated by reference to reference to figure 2, Fig. 3, Fig. 4, Fig. 5, in the present embodiment, described in enclose frame entirety can be tubular, it can be cylinder according to needs of production can be also square tube, and present embodiment is not as limit.Described frame entirety of enclosing can be made up of stainless steel.Described first end 2 and described second end 3 are respectively the two ends of described main body, and its integral position can be vertically setting up and down, and namely described second end 3 is arranged on the top of described first end 2, to adapt to high-temperature flue gas up direction.Described first end 2 is described high-temperature flue gas inlet end, described second end 3 connects described discharge flue 100, and then the high-temperature flue gas described burner combustion to be formed is discharged, simultaneously, the described cavity enclosing frame can provide installing space for described cooling heat transferring pipe 6, makes described cooling heat transferring pipe 6 directly carry out heat trnasfer with high-temperature flue gas.
The inside of described cooling heat transferring pipe 6 is liquid flow conduits.When the work of described stainless heat exchanger, described cooling heat transferring pipe 6 absorbs the heat of high-temperature flue gas release and the liquid heated in described cooling heat transferring pipe 6, and described high-temperature flue gas own temperature reduces, and then completes the heat exchange work of stainless heat exchanger.
Concrete, enclose the inside of frame described in the outside of enclosing frame described in described cooling heat transferring pipe 6 can be located at also can be located at, the application is not as limit.Described cooling heat transferring pipe 6 and described sidewall 1 have multiple heat transfer type, such as: described cooling heat transferring pipe 6 and described sidewall can be made integrally by the mode such as welding, and also can be conducted heat by contact, the application is not as limit.
Please refer to Fig. 2, described cooling heat transferring pipe 6 be located at described in when enclosing outside frame, described heat-conducting plate 4 can transfer heat to described cooling heat transferring pipe 6 indirectly by sidewall 1.For ensureing heat-transfer effect, the described connecting portion 13 enclosing frame and described cooling heat transferring pipe 6 can be provided with groove, this groove is outstanding to described frame inside of enclosing, described cooling heat transferring pipe 6 is positioned at described groove, simultaneously, described groove in encirclement trend as shown in Figure 2 to described cooling heat transferring pipe 6, is positioned at described groove with the cooling heat transferring pipe 6 enclosing frame outside described in making and contacts with its sidewall 1.
Please refer to Fig. 3, described cooling heat transferring pipe 6 be located at described in when enclosing inside frame, described heat-conducting plate 4 is connected with described cooling heat transferring pipe 6, and then described heat-conducting plate 4 directly can transfer heat to the described cooling heat transferring pipe 6 being positioned at and enclosing frame inside.In such cases, the described connecting portion enclosing frame and described cooling heat transferring pipe 6 also can be provided with to enclosing frame groove protruding outside, described cooling heat transferring pipe 6 is positioned at this groove, described groove can be encirclement trend to described cooling heat transferring pipe 6, and the cooling heat transferring pipe 6 enclosing frame inside described in making is positioned at described groove and contacts with its sidewall 1.
The material of described heat-conducting plate 4 can be refractory metal, and certainly can select stainless steel material, the application is not as limit.The quantity of described heat-conducting plate 4 can one also can be multiple, its magnitude setting can set flexibly according to actual conditions.Further, described heat-conducting plate 4 can be connected for line with described sidewall 1 or face connects.Described heat-conducting plate 4 can for welding, and then make it firmly be arranged on described sidewall 1 with the connected mode of described sidewall 1.
Further, described heat-conducting plate 4 also can be connected for line with between described cooling heat transferring pipe 6 or described connecting portion 13 or face connects, in this embodiment, described connects for described heat-conducting plate 4 and described cooling heat transferring pipe 6 or described connecting portion 13 1 kinds of preferred connected modes.
Concrete, described heat-conducting plate 4 can be located at the inner surface of described sidewall 1, and then part or all of described sidewall 1 can separate with described high-temperature flue gas by described heat-conducting plate 4, the sidewall 1 being positioned at described sidewall predetermined position is avoided directly to be subject to the impact of high-temperature flue gas and to transfer heat to cooling heat transferring pipe 6, to reach the effect to predetermined position heat conduction cooling.
Inventor of the present utility model studies discovery further based on the above basis found, in the uphill process of high-temperature flue gas, due to the stop of fin heat exchange pipe, part high-temperature flue gas can flow to sidewall 1 region near fin heat exchange pipe, high temperature impact is produced to this region, cause the temperature in this region higher than other regions of sidewall 1, and then form the first high-temperature region 11, when burner combustion state and burner quit work, the temperature difference that this region experiences is larger, the thermal shock be subject to is higher, and then easily forms crackle in the region near fin heat exchange pipe.
Accordingly, at the sidewall 1 of described stainless heat exchanger near the region of burner flame due near flame, when burner combustion, the temperature in this region is higher than other regions, and then form the second high-temperature region 12 herein, when burner combustion state and burner quit work, this region also experienced by larger variations in temperature, and the thermal shock be subject to is higher, and then easily forms crackle at the sidewall 1 of described heat exchanger near the region of described first end 2.
Consider based on the first high-temperature region 11 that described sidewall 1 is formed, the application provides a kind of embodiment.This embodiment as shown in Figures 2 and 3, described in enclose frame inside and can be provided with fin 5, and described fin 5 is near described second end 3.Enclose the inside of frame described in described fin 5 is positioned at, its can increase described in enclose frame inside with the heat exchange area of high-temperature flue gas, and then improve the heat transference efficiency of heat exchanger.In the present embodiment, described sidewall predetermined position is described sidewall 1 part of fin 5 correspondence contacting high-temperature flue gas at first, and meanwhile, described heat-conducting plate 4 connects the fin 5 contacting high-temperature flue gas at first.Described sidewall predetermined position is above-mentioned first high-temperature region 11.
The described fin 5 contacting high-temperature flue gas at first can, for being vertically positioned at the fin 5 of bottom, also can be the fin 5 near described first end 2.Meanwhile, in the present embodiment, described heat-conducting plate 4 connects described first high-temperature region 11, and the heat of described first high-temperature region 11 is passed to described fin 5 by described heat-conducting plate 4, improves the thermal efficiency.
In the present embodiment, one end of described heat-conducting plate 4 can be connected with described sidewall 1, the other end can with described cooling heat transferring pipe 6 or described in enclose frame and be connected with the connecting portion 13 (wall of described groove) of described cooling heat transferring pipe 6.Arranged by this kind, described sidewall predetermined position, described fin 5 and described cooling heat transferring pipe 6 connect by described heat-conducting plate 4, and then by heat-conducting plate 4 heat of described first high-temperature region 11 can be passed to fin 5 and enclose the inner or outside cooling heat transferring pipe 6 of frame described in being positioned at.
Concrete, gap 41 can be there is between described heat-conducting plate 4 and described sidewall 1.Can the heat conduction cooling-down effect of the described heat-conducting plate 4 of raising by a relatively large margin by described gap 41, and then reduce the temperature of described first high-temperature region 11 largely.
Described gap 41 for being provided with certain arching upward in the middle of described heat-conducting plate 4, and then can form cambered plate; Or as shown in Figure 2, the part between itself and described side junction of described sidewall 1 forms a groove by enclosing in frame to enclosing to protrude outside frame, forms the gap 41 between described heat-conducting plate 4 and described sidewall 1 by this groove; In addition, this groove that described sidewall 1 is formed can increase the amount of contraction of sidewall 1 when being subjected to larger variations in temperature, and then reaches the effect better preventing from ftractureing.
Consider based on the second high-temperature region 12 that described sidewall 1 is formed, the application provide embodiment as shown in Figure 4, in this embodiment, described sidewall 1 predetermined position near described in enclose sidewall 1 part of frame first end 2.Described sidewall predetermined position and described second high-temperature region 12 position consistency, and then led away by the heat of described heat-conducting plate 4 by described second high-temperature region 12, reduce the temperature of described second high-temperature region 12, the final tendency reducing this region side walls 1 cracking.
Further, please continue to refer to Fig. 4, the inner surface of frame is enclosed described in described heat-conducting plate 4 can be positioned at, enclose the inner surface of frame described in described heat-conducting plate 4 is positioned at, described heat-conducting plate 4 from described cooling heat transferring pipe 6 or described in enclose the connecting portion 13 of frame and described cooling heat transferring pipe 6 connecting portion extend to described direction of enclosing frame first end 2 place.Described heat-conducting plate 4 encloses the first end 2 of frame with described or be connected near the position of described first end 2.
In this embodiment, enclose outside frame described in being positioned at described cooling heat transferring pipe 6, and, when the described connecting portion 13 enclosing frame and described cooling heat transferring pipe 6 is groove, described heat-conducting plate 4 can be that face is connected with the wall of described groove with the junction of described groove, and in encirclement trend, to ensure heat-conducting plate 4 and described heat-transfer effect between the described cooling heat transferring pipe 6 enclosing frame outside.
Consider based on the second high-temperature region 12 that described sidewall 1 is formed, another embodiment that the application also provides.Please refer to Fig. 5, in this embodiment, described heat-conducting plate 4 is positioned at the outer surface of described sidewall 1, and one end of described heat-conducting plate 4 is connected with cooling heat transferring pipe 6, and the other end of described heat-conducting plate 4 is connected with described first end 2 or near the position of described first end 2.In this embodiment, described in described heat-conducting plate 4 is positioned at, enclose the outside of frame, its only be positioned at the cooling heat transferring pipe 6 enclosing frame outside and be connected and conduct heat.When described heat-conducting plate 4 is connected with described cooling heat transferring pipe 6, described heat-conducting plate 4 junction and described cooling heat transferring pipe 6 preferably for face is connected, and are encirclement trend, and then ensure good heat-transfer effect between described heat-conducting plate 4 and described cooling heat transferring pipe 6.Meanwhile, the described cooling heat transferring pipe 6 that described heat-conducting plate 4 connects is not limited to the cooling heat transferring pipe 6 nearest apart from described second high-temperature region 12, and the cooling heat transferring pipe 6 enclosing frame outside described in being positioned at all can be connected to carry out heat transmission with this heat-conducting plate 4.
Multiple embodiments heat-conducting plate 4 being arranged to installation are given above to the description of the stainless heat exchanger of a kind of gas water heater of the application or wall-hung boiler; it should be explicitly made clear at this point; can be combined with each other between above-mentioned multiple embodiment; to reach the best crack resistence effect of oppose side wall 1; those skilled in the art should learn, the produced embodiment that be combined with each other between above-described embodiment still falls into and this application claims in the scope of protection.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (14)
1. a stainless heat exchanger for gas water heater or wall-hung boiler, it comprises:
By sidewall surround there is hollow cavity enclose frame, described in enclose frame have back to first end and the second end; Described first end is high-temperature flue gas inlet end; Described second end is for connecting discharge flue;
The described frame that encloses is provided with at least one cooling heat transferring pipe;
It is characterized in that: described sidewall predetermined position is provided with at least one heat-conducting plate, described heat-conducting plate and described cooling heat transferring pipe or described in enclose frame and be connected with the connecting portion of described cooling heat transferring pipe.
2. stainless heat exchanger as claimed in claim 1, is characterized in that: part or all of described sidewall and described high-temperature flue gas separate by described heat-conducting plate.
3. stainless heat exchanger as claimed in claim 2, it is characterized in that: described in enclose frame inside and be provided with fin, described sidewall predetermined position is contact described sidewall sections corresponding to the fin of high-temperature flue gas at first, and described heat-conducting plate connects the fin contacting high-temperature flue gas at first.
4. stainless heat exchanger as claimed in claim 3, is characterized in that: described heat-conducting plate one end is connected with described sidewall, the other end and described cooling heat transferring pipe or described in enclose frame and be connected with the connecting portion of described cooling heat transferring pipe.
5. stainless heat exchanger as claimed in claim 4, is characterized in that: there is gap between described heat-conducting plate and described sidewall.
6. stainless heat exchanger as claimed in claim 2, is characterized in that: described sidewall predetermined position near described in enclose the sidewall sections of frame first end.
7. stainless heat exchanger as claimed in claim 6, it is characterized in that: the inner surface enclosing frame described in described heat-conducting plate is positioned at, described heat-conducting plate from described cooling heat transferring pipe or described in enclose the connecting portion of frame and described cooling heat transferring pipe connecting portion extend to described direction of enclosing frame first end place.
8. stainless heat exchanger as claimed in claim 7, is characterized in that: described heat-conducting plate encloses the first end of frame with described or be connected near the position of described first end.
9. stainless heat exchanger as claimed in claim 1, is characterized in that: described cooling heat transferring pipe be located at described in enclose outside frame.
10. stainless heat exchanger as claimed in claim 9, is characterized in that: described in enclose frame and described cooling heat transferring pipe connecting portion be provided with groove, described cooling heat transferring pipe is positioned at described groove.
11. stainless heat exchangers as claimed in claim 1, is characterized in that: described cooling heat transferring pipe be located at described in enclose inside frame, described heat-conducting plate is connected with described cooling heat transferring pipe.
12. stainless heat exchangers as claimed in claim 1, is characterized in that: described heat-conducting plate and described sidewall are that line is connected or face connects.
13. stainless heat exchangers as claimed in claim 12, is characterized in that: described heat-conducting plate and described sidewall weld are fixed.
14. stainless heat exchangers as claimed in claim 1, it is characterized in that: described heat-conducting plate is positioned at the outer surface of described sidewall, one end of described heat-conducting plate is connected with cooling heat transferring pipe, and the other end of described heat-conducting plate is connected with first end or near the position of described first end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520104962.1U CN204478503U (en) | 2015-02-12 | 2015-02-12 | The stainless heat exchanger of gas water heater or wall-hung boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520104962.1U CN204478503U (en) | 2015-02-12 | 2015-02-12 | The stainless heat exchanger of gas water heater or wall-hung boiler |
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| Publication Number | Publication Date |
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| CN204478503U true CN204478503U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520104962.1U Withdrawn - After Issue CN204478503U (en) | 2015-02-12 | 2015-02-12 | The stainless heat exchanger of gas water heater or wall-hung boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654588B (en) * | 2015-02-12 | 2017-06-09 | 艾欧史密斯(中国)热水器有限公司 | The stainless heat exchanger of gas water heater or wall-hung boiler |
-
2015
- 2015-02-12 CN CN201520104962.1U patent/CN204478503U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654588B (en) * | 2015-02-12 | 2017-06-09 | 艾欧史密斯(中国)热水器有限公司 | The stainless heat exchanger of gas water heater or wall-hung boiler |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170609 |
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| AV01 | Patent right actively abandoned |