CN202432552U - Hollow water-circulation heat exchanging furnace - Google Patents
Hollow water-circulation heat exchanging furnace Download PDFInfo
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- CN202432552U CN202432552U CN2012200380736U CN201220038073U CN202432552U CN 202432552 U CN202432552 U CN 202432552U CN 2012200380736 U CN2012200380736 U CN 2012200380736U CN 201220038073 U CN201220038073 U CN 201220038073U CN 202432552 U CN202432552 U CN 202432552U
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- heat exchange
- water
- flue
- water jacket
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Abstract
The utility model discloses a hollow water-circulation heat exchanging furnace which comprises a water jacket furnace body and a water jacket flue which is communicated with the water jacket furnace body. Parallel hollow heat exchangers in 'Z' shape or front-and-back staggered hollow heat exchangers shaped in stripes or cylindrical are arranged on an upper wall of the water jacket flue, and an upper water jacket of the flue is provided with a water supply device which communicates the hollow heat exchangers to a side water jacket system. Water outlet ends which are arranged on a preferred pipeline structure extend to the interior of the hollow heat exchangers, then sedimentation water supplies are formed in the hollow heat exchangers, heat exchange loops by peripheral hot water are formed, and staggered scouring heat exchange of the hollow heat exchangers can be further achieved. A rotary adjusting device can be arranged in the space below the strip-shaped hollow heat exchangers to enable the furnace to be low in heat exchanging exhaust and high in energy conservation for heat exchanging at the same time, temperature of heated brick beds can be optionally selected, and the purposes for energy saving and environment-friendliness are achieved.
Description
Technical field
The utility model relates to a kind of home-use furnace that drives heating supply.
Background technology
Pile up dust in order to solve home-use furnace heat exchange body upper surface, in flue, be difficult to the cleaning problem; Further promote the heat exchange efficiency of furnace.The applicant discloses a technology in 201020124908.0 patents; He is a upper wall in the water jacket flue that is communicated with furnace water jacket; Hang and establish a plurality of strip grooved heat exchange bodies; Be utilized near grooved heat exchange body counter-fire end flue upper water cover delivery port is set; In the water jacket of flue side, being provided with can be with the lead water conservancy diversion partition panel of grooved heat exchange body back of the body fire end direction and form by its back of the body fire end to the heat exchange current that the counter-fire end flows in that grooved heat exchange body is inner of water body, makes to get into thermal current that grooved heat exchange body asks along the abundant heat exchange of its longitudinal length.But it is, big in the stove and accessory draft, when flue gas flow rate is very fast, still have heat straight line losing issue because grooved heat exchange body is strip grooved heat exchange body as shown in the figure.Overlook when being " it " font grooved heat exchange body for addressing this problem to select to be provided with; Because this grooved heat exchange body has a plurality of oblique wash surfaces; Just make and be difficult to satisfy the heat demand that this grooved heat exchange body obviously increases by the current that sink to by this grooved heat exchange body one end.And upper strata water jacket relaying continuous flow and discharge the intensification current that hot water constantly merges to the flue temperature end with grooved heat exchange body also can't sink to bottom land at other sections of grooved heat exchange body, solve this grooved heat exchange body counter-fire end because of lacking the circulation water body that the occurs problem that gasifies that supplies water.Make and further select for use the setting of high efficient heat exchanging hollow body to be restricted.
The utility model content
The technical problem that the utility model will solve provides and a kind ofly can abundant water supply be provided for the omnidistance heat exchange of hollow heat exchange body, realizes that hollow heat exchange body staggeredly washes away heat exchange, significantly promotes the furnace of heat exchange efficiency.
For addressing the above problem; The utility model has adopted a kind of like this hollow body water cycle heat exchange furnace; The water jacket flue that it comprises water jacket furnace and is interconnected; This water jacket furnace and water jacket flue are provided with water inlet and delivery port, and this water jacket flue comprises the hollow heat exchange body that is arranged on upper wall in the flue, and flue upper water cover is provided with the water supply installation of linking up hollow heat exchange body to side water jacket system.
The water supply installation of linking up hollow heat exchange body to side water jacket system is set through the upper water cover; The big temperature difference of rising water body in body of heater capable of using or flue side water body and the hollow heat exchange body; For providing the sedimentation of multiple spot position, hollow heat exchange body supplies water; Thereby bring into play the staggered heat exchange efficacy that washes away of hollow heat exchange body and thermal current, promote the heat exchange efficiency of furnace, realize energy-saving and emission-reduction.
A kind of preferred structure as the utility model; This water supply installation is the pipeline constituting body that is arranged in the water jacket of upper strata; The water inlet of this pipeline constituting body is connected with flue side water jacket, and the water side that is provided with on this pipeline constituting body is corresponding with the open upper end of hollow heat exchange body.Adopt this structure, the closure that can keep the side water jacket to supply water improves water supply effect.
As the further improvement of above-mentioned preferred structure, extend to hollow heat exchange body inside the water side of this pipeline constituting body, and leave at interval with the inwall and the bottom of hollow heat exchange body.Adopt this structure, can effectively isolate the fusion of interior rising hot water of hollow heat exchange body and sinking water body, accelerate the flowing velocity that supplies water.
As the further improvement of said structure, this is provided with limit body between water side outer wall that extends below and hollow heat exchange body inwall.Adopt this structure, can keep the suitable interval of water side outer wall and hollow heat exchange body inwall, make hollow heat exchange body stablize heat exchange.
As the further improvement of said structure, this hollow heat exchange body is to overlook the flute profile heat exchange body that is " it " font or overlook the flute profile heat exchange body that is strip, and this strip flute profile heat exchange body can the multi-row staggered setting in front and back in the water jacket flue.Adopt said structure, can realize staggered wash away heat exchange, the heat exchange efficiency of lifting furnace of thermal current between hollow heat exchange body.
Another kind as said structure improves, and this hollow heat exchange body is cylindric barrel-shaped heat exchange body, and this barrel-shaped body can the multi-row staggered setting in front and back in the water jacket flue.Adopt the cylindric barrel-shaped heat exchange body of said structure to compare, work simplification, safe in utilization, with low cost and avoided the secondary heat exchange of superconducting fluid and water body and further improved heat exchange efficiency with the superconduction rod heat exchange body of market function of the same race.
Further improvement as said structure; Lower space at strip flute profile heat exchange body is provided with rotation adjustment device, to water jacket flue lower wall panels that should rotation adjustment device have one with the corresponding opening of its size; The outer of this opening is provided with loose slot; In the peripheral groove of loose slot, be provided with heat-resisting closed material, the loose slot outer end is provided with the locking device corresponding with flue.This rotation adjustment device comprises adjustable plate and the fiery plate of holder, and the corresponding flue sidewall of the rotating shaft that is provided with on the adjustable plate asks fiery plate to be provided with the bar shaped turning set, and the turning cylinder that can in the bar shaped turning set, move back and forth is arranged on the adjustable plate.Adopt this structure, can hollow heat exchange body lower space be led directly to and open, realize poor efficiency heat exchange smoke evacuation, can hollow heat exchange body lower space be closed again, realize the efficient burning heat exchange, and can regulate the heated kang temperature arbitrarily, realize energy-saving and emission-reduction.Open loose slot, also can inner dust of flue and rotation adjustment device be cleared up.
Description of drawings
Do further detailed description below in conjunction with the embodiment of accompanying drawing and the utility model.
Fig. 1 is first kind of embodiment half sectional view of the utility model hollow body water cycle heat exchange furnace.
Fig. 2 is the cutaway view of first kind of embodiment hollow body water cycle heat exchange furnace along the A-A line.
Fig. 3 is second kind of embodiment, the partial sectional view of hollow body water cycle heat exchange furnace.
Fig. 4 is that the third is an embodiment, the partial sectional view of hollow body water cycle heat exchange furnace.
The specific embodiment
The utility model embodiment by shown in Figure 1 can know, water jacket furnace 1 top is provided with individual layer stone or metal plate for standing a stove on as a precaution against fire 6 or water jacket body stone or metal plate for standing a stove on as a precaution against fire 6 is set and is connected with body of heater 1 water jacket.Leave the double mouth 4 of cooking a meal of doing of coal-fired filling port on the stone or metal plate for standing a stove on as a precaution against fire 6; This fire coal filling port also can be arranged on body of heater one side; These stone or metal plate for standing a stove on as a precaution against fire 6 the next monomer or water jacket body heat exchanger plates 15 of also can being provided with; This heat exchanger plates 15 be provided with do cook a meal mouthfuls 4 with stone or metal plate for standing a stove on as a precaution against fire do cook a meal mouthfuls 4 relative up and down; This is done the mouth 4 of cooking a meal and is provided with capping 14; Certainly, this monomer heat exchanger plates 15 also can be provided with a ring-shaped water jacket around doing the mouth 4 of cooking a meal, and is connected with body of heater 1 water jacket, to reduce the temperature of capping 14, reduces thermal loss.Water jacket body stone or metal plate for standing a stove on as a precaution against fire 6 upper ends can also not be provided with does the mouth 4 of cooking a meal, the stone or metal plate for standing a stove on as a precaution against fire 6 the next heat exchanger plates 15 that are not provided with, and coal-filling hole is arranged on body of heater one side.Be provided with fire grate 17 and grey thorax 18 below the water jacket furnace 1, grey thorax one side is provided with air inlet, and the air inlet place is provided with the ash bucket 19 of this air inlet of sealing.When furnace was selected gaseous fuel, water jacket furnace 1 bottom also can be provided with closure plate, and gas burner is set on the closure plate, and its interface is drawn in body of heater is outside and is connected with valve, gas line.Water jacket furnace 1 set inside has furnace lining 3; In water jacket furnace 1 one sides, be provided with the water jacket flue 5 that is interconnected, the front end of water jacket flue 5 is provided with exhaust opening 16; Being provided with water jacket flue 5 front ends of exhaust opening 16, can be that the water jacket body also can be one section veneer body, and exhaust opening 16 can be provided with forward, also can upwards be provided with.Be provided with water inlet 2 in water jacket furnace 1 bottom,, be provided with delivery port 12 on water jacket flue 5 tops.Interior upper wall at water jacket flue 5; Be provided with hollow heat exchange body; The opening that this hollow heat exchange body upper end has places flue upper strata water jacket 7, and the interior upper wall Joint of the periphery of its opening and water jacket flue 5, hollow heat exchange body comprise flute profile heat exchange body and barrel-shaped heat exchange body; Wherein the plan view shape of flute profile heat exchange body can be " it " font, bar shaped or other suitable shape; Hollow heat exchange body can be a plurality of, can be single transversely arranged in the flue wainscot, and also can the multi-row staggered setting in front and back.When body of heater 1 plan view shape is circular, it is arc that flue advances the mouth plan view shape, and hollow heat exchange body also can be by advancing the arc shooting of mouth shape.Adopt above-mentioned setting, can prolong thermal current heat exchange stroke, enhanced heat exchange body wash away the heat exchange effect, can avoid being horizontally disposed with heat exchange body upper surface again and pile up cigarette ash, in flue, be difficult to the cleaning problem, help keeping the long-term high efficient heat exchanging of heat exchange body.The interior wainscot of water jacket flue 5 can be a platysome, also can be bending body.In upper strata flue water jacket 7; Be provided with the water supply installation of linking up hollow heat exchange body to side water jacket system, said side water jacket system comprises flue side water jacket 8 and the furnace water jacket 1 that is communicated with it, thereby has reduced the supply water temperature of hollow heat exchange body; Increased the gravitational difference that supplies water with the rising water body that is heated; And supply water for hollow heat exchange body provides vertical multi-segment, guaranteed that hollow heat exchange body efficiently washes away heat exchange in flue, promoted the heat exchange efficiency of furnace.This water supply installation can be a plurality of single tube bodies, also can be the assembly of pipeline, can also be the assembly of flute profile and pipeline.The water inlet 19 of water supply installation can extend to body of heater 1 peripheral water jacket, also can rest in the flue side water jacket 8.Experiment shows; Water supply installation is employed in flue upper strata water jacket 7 pipeline constituting body 9 is set, and its water inlet 19 is connected with flue side water channel 8, and its water side 29 is corresponding with the open upper end of hollow heat exchange body; No matter be to simplify production technology or optimization water supply effect, all suit.Obviously, water side 29 has the opening of water outlet.Pipeline constituting body 9 can be a plurality of hollow strip shape bodies, and cross direction profiles is in flue upper strata water jacket 7, and water side 29 can be provided with one or more along this hollow strip shape body.These pipeline constituting body 9 tops can also be flat pipe bodies, and water side 29 can the many rows in front and back be distributed on the lower surface of this flat pipe body.Pipeline constituting body 9 can be the integral body setting of cross connection flue both sides side water jacket 8, also can be that both sides water inlet 19 relatively extends in flue respectively and extending the split setting that clearing end seals.Water inlet 19 ends of this pipeline constituting body 9 can roughly become a plane with water jacket flue 5 inner side wall plate, also can be arranged in the flue upper strata water jacket 7.The cross sectional shape of this pipeline constituting body 9 can be square, circle, or other suitable shape.This pipeline constituting body 9 can adopt metal material to make, but adopts nylon or heat-resisting plastic material moulding making to suit beyond doubt.In Fig. 1, first kind of embodiment shown in Figure 2, hollow heat exchange body is the flute profile heat exchange body 10 that plan view shape is " it " font, and this flute profile heat exchange body 10 is a plurality of, and is transversely arranged at interval by suitably cocking off.Oblique section of formation " it " font flute profile heat exchange body 10 can be two sections and also can be multistage; Above the notch of this flute profile heat exchange body 10; Can be by each oblique section horizontally set pipeline constituting body 9 of this flute profile heat exchange body 10, the water side 29 that pipeline constituting body 9 bottoms are provided with is corresponding with oblique section notch of flute profile heat exchange body 10.The width of this pipeline constituting body 9 can make each ascending current of oblique section discharge from a side direction of pipeline constituting body 9 less than " it " font flute profile heat exchange body 10 each length of oblique section.The water side 29 of this pipeline constituting body 9 may extend to this flute profile heat exchange body 10 inside; And leave at interval with the inwall of flute profile heat exchange body 10 and diapire; Can effectively isolate the fusion of 10 inner cryogenic sedimentation water supply of flute profile heat exchange body and high temperature rising water body, quicken circulating of water body.
Second kind of embodiment hollow body water cycle heat exchange furnace shown in Fig. 3; Only be with the difference of first kind of embodiment hollow body water cycle heat exchange furnace: hollow heat exchange body is cylindrical barrel-shaped heat exchange body 13; This barrel-shaped heat exchange body 13 is a plurality of; Multi-row staggered setting before and after being leaves each other and cocks off at interval.Obviously, the water side 29 of pipeline constituting body 9 belows is with barrel-shaped heat exchange body 13 is relative up and down, quantity is suitable, shape is corresponding.For keeping water side 29 consistent at interval with barrel-shaped heat exchange body 13 inwalls, limit body 30 further can be crisscross arranged between water side 29 outer walls and barrel-shaped heat exchange body 13 inwalls.The water body of 29 injections along the water side can be risen by thermally equivalent, in the barrel-shaped heat exchange body 13 of column, form stable current heat-exchanging loop.
The third embodiment hollow body water cycle heat exchange furnace shown in Fig. 4; The difference of itself and Fig. 3 hollow body water cycle heat exchange furnace only is: the plan view shape of flute profile heat exchange body is bar shaped or " 1 " font; This bar shaped heat exchange body 11 is a plurality of; Multi-row staggered setting before and after being, and all leave each other and cock off in right amount at interval.In this embodiment, the shaped upper part of pipeline constituting body 9 is roughly flute profile, and constitutes pipe body with the wainscot of flue upper strata water jacket 7.Certainly, the shaped upper part of this pipeline constituting body 9 also can be other bodies that can constitute pipe body with this wainscot.Wainscot leaves away the hydrospace in the lower surface of these pipeline constituting body 9 its top bodies and the water jacket flue 5.Certainly; Two ends and an end of this two ends correspondence chimney meatus transmitting smoke mouth 16 and the water inlet 19 that flue side water jacket 8 constitutes a partial closure with pipeline constituting body 9 corresponding flue side water jackets 8; The flue side water jacket 8 of can blocking directly flows to the current of delivery port 12, improves the water supply effect of pipeline constituting body 9.Water side 29 correspondences that are arranged at pipeline constituting body 9 lower walls are located at bar shaped heat exchange body 11 inside.Lower space at bar shaped heat exchange body 11; Be provided with rotation adjustment device; Wherein preferred rotation adjustment device constitutes with the fiery plate 23 of holder by rotating the adjustable plate 21 that joins each other, and an end of adjustable plate 21 is provided with rotating shaft 20, and the side of rotating shaft 20 is equal with an end of adjustable plate 21 and corresponding with the lower wall panels end of water jacket flue; The flue sidewall plate of corresponding rotating shaft 20 is provided with and the corresponding open-work of this rotating shaft 20 sizes, and rotating shaft 20 is provided with rotating spanner and corresponding stopping means at the exit of this open-work.On the fiery plate 23 of holder, be provided with bar shaped turning set 22, the lower end of turning set can be provided with opening, and the corresponding turning cylinder 24 that is provided with can be put into from this opening and move back and forth at turning set 22 on the adjustable plate 21.Certainly, turning set 22 also can not be provided with opening.When adjustable plate 21 rotated counterclockwise, adjustable plate 21 ends can be harmonious with the fiery plate face of holder, at this moment; 11 times end spaceses of flute profile heat exchange body are straight-through to be opened, and makes a small amount of heat exchange of flue gas get into heated kang, improves the flue gas velocity of heated kang; Make furnace under the state of banking up a fire, realize slow fast fire, and heat up to heated kang.When adjustable plate 21 clockwise rotated, adjustable plate 21 and these flute profile heat exchange body 11 lower space of the fiery plate 23 front and back block of holder were held in the palm the high temperature gas flow after the normal combustion in the stove at interval between flute profile heat exchange body by flute profile heat exchange body bottom and to wash away heat exchange.Be rotated further adjustable plate 21, ask fiery plate 23 outer ends and flue wainscot space constantly to compress, realize suppressing fire, reach the long duration burning of fuel.The lower wall panels of this flue have one with the corresponding openings of the fiery plate of holder 23 sizes, this asks fiery plate 23 from this opening, to rout up to carry out the cigarette ash cleaning.The outer of opening is provided with loose slot 25, is filled with heat-resisting closed material 26 in the peripheral groove of loose slot 25, seals mutually with the flue lower wall panels.The outer end of loose slot 25 is provided with the locking device corresponding with flue 27, so that to loose slot 25 fastening or unlatchings.
The utility model is not limited to Fig. 1 to the structure of embodiment shown in Figure 4, so long as flue side water jacket 8 water bodys are imported the structure setting of hollow heat exchange body inner loop heat exchange, and all within the protection domain of the utility model.
Claims (9)
1. hollow body water cycle heat exchange furnace; The water jacket flue (5) that comprises water jacket furnace (1) and be interconnected; This water jacket furnace (1) and water jacket flue (5) are provided with water inlet (2) and delivery port (12); This water jacket flue (5) comprises the hollow heat exchange body that is arranged on upper wall in the flue, it is characterized in that: flue upper strata water jacket (7) is provided with the water supply installation of linking up hollow heat exchange body to side water jacket system.
2. according to the described furnace of claim 1; It is characterized in that: said water supply installation is the pipeline constituting body (9) that is arranged in the flue upper strata water jacket (7); The water inlet (19) of this pipeline constituting body (9) is connected with flue side water jacket (8), and it is corresponding with the open upper end of hollow heat exchange body that this pipeline constituting body (9) is gone up the water side (29) that is provided with.
3. according to the described furnace of claim 2, it is characterized in that: extend to hollow heat exchange body inside the water side (29) of said pipeline constituting body (9), and leave at interval with the inwall and the bottom of hollow heat exchange body.
4. according to the described furnace of claim 3, it is characterized in that: said between the water side that extends below (29) outer wall and hollow heat exchange body inwall, be provided with limit body (30).
5. according to each described furnace in the claim 1 to 4, it is characterized in that: said hollow heat exchange body is to overlook the flute profile heat exchange body (10) that is " it " font.
6. according to each described furnace in the claim 1 to 4, it is characterized in that: said hollow heat exchange body is a columned barrel-shaped body (13), and this cylindrical barrel body (13) can the multi-row staggered setting in front and back in water jacket flue (5).
7. according to each described furnace in the claim 1 to 4, it is characterized in that: said hollow heat exchange body is to overlook the flute profile heat exchange body (11) that is strip, and this strip flute profile heat exchange body (11) can the multi-row staggered setting in front and back in water jacket flue (5).
8. according to the described furnace of claim 7; It is characterized in that: the lower space at strip flute profile heat exchange body (11) is provided with rotation adjustment device; To water jacket flue (5) lower wall panels that should rotation adjustment device have one with the corresponding opening of its size; The outer of this opening is provided with loose slot (25), is provided with heat-resisting closed material (26) in the peripheral groove of loose slot (25), and loose slot (25) outer end is provided with the locking device corresponding with flue (27).
9. according to the described furnace of claim 8; It is characterized in that: said rotation adjustment device comprises adjustable plate (21) and holder fiery plate (23); Adjustable plate (21) is gone up the corresponding flue sidewall of rotating shaft (20) that is provided with; Ask fiery plate (23) to be provided with bar shaped turning set (22), the turning cylinder (24) that can in bar shaped turning set (22), move back and forth is arranged on the adjustable plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200380736U CN202432552U (en) | 2011-05-13 | 2012-02-07 | Hollow water-circulation heat exchanging furnace |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120160552 | 2011-05-13 | ||
| CN201120160552.0 | 2011-05-13 | ||
| CN2012200380736U CN202432552U (en) | 2011-05-13 | 2012-02-07 | Hollow water-circulation heat exchanging furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202432552U true CN202432552U (en) | 2012-09-12 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210026018XA Pending CN102538018A (en) | 2011-05-13 | 2012-02-07 | Hollow-body water-circulating heat-exchanging warm-air furnace |
| CN2012200380736U Expired - Fee Related CN202432552U (en) | 2011-05-13 | 2012-02-07 | Hollow water-circulation heat exchanging furnace |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210026018XA Pending CN102538018A (en) | 2011-05-13 | 2012-02-07 | Hollow-body water-circulating heat-exchanging warm-air furnace |
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| CN (2) | CN102538018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538018A (en) * | 2011-05-13 | 2012-07-04 | 张维平 | Hollow-body water-circulating heat-exchanging warm-air furnace |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2111469U (en) * | 1991-12-31 | 1992-07-29 | 刘占领 | Multi-functional coal-saving stove |
| GB9316044D0 (en) * | 1993-08-03 | 1993-09-15 | Aga Rayburn | Improvements relating to oil or gas-burning stoves |
| IES960711A2 (en) * | 1996-10-04 | 1997-07-30 | Heating Research Limited | Method of converting a cooker or stove from solid fuel to oil or gas |
| RU2232948C2 (en) * | 2002-04-15 | 2004-07-20 | Коммандитное товарищество "Черноиванов и Кє Таганрогский Механический завод" | Heating boiler |
| CN201138054Y (en) * | 2007-12-08 | 2008-10-22 | 王延革 | Water heating furnace |
| CN201377817Y (en) * | 2009-02-25 | 2010-01-06 | 邹明学 | Heating stove |
| CN101818912A (en) * | 2010-03-08 | 2010-09-01 | 张维平 | Warming gas furnace |
| CN201819274U (en) * | 2010-04-13 | 2011-05-04 | 张维平 | Furnace |
| CN102538018A (en) * | 2011-05-13 | 2012-07-04 | 张维平 | Hollow-body water-circulating heat-exchanging warm-air furnace |
-
2012
- 2012-02-07 CN CN201210026018XA patent/CN102538018A/en active Pending
- 2012-02-07 CN CN2012200380736U patent/CN202432552U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538018A (en) * | 2011-05-13 | 2012-07-04 | 张维平 | Hollow-body water-circulating heat-exchanging warm-air furnace |
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| CN102538018A (en) | 2012-07-04 |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20180207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |