CN100516753C - Improved low temperature heat pipe heat exchanger - Google Patents
Improved low temperature heat pipe heat exchanger Download PDFInfo
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- CN100516753C CN100516753C CNB2007101229003A CN200710122900A CN100516753C CN 100516753 C CN100516753 C CN 100516753C CN B2007101229003 A CNB2007101229003 A CN B2007101229003A CN 200710122900 A CN200710122900 A CN 200710122900A CN 100516753 C CN100516753 C CN 100516753C
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Abstract
The invention discloses a second generation low temperature heat pipe and its making craft way , composing of aluminum tube, aluminum plate fin, aluminum clapboard ,frame ,endplate ,cover plate ,yoke plate and fastening bolt, many rectangle alumna plate fin overlap to rectangle cubic type with inner clearance with center spacer set in the central part, on the aluminum plate fin and alumina clapboard has many regular spread turned-over edge pylomes, and alumina tubes inbesinsert in the pylomes, the aluminum tube tightly fit to the aluminum fin and alumina after extends by expanding tube machine. The two ends of aluminum tube are seal weld, and ammonia or acetone liquid is filled in the aluminum tube, forming entire aluminum heat tube's heat exchanging subject, fix the heat exchanging subject to the inner shell composed by frame, endplavte, cover plate, yoke plate through fastening bolts. The clapboard divides the inner shell space into tow sealed areas of air intaking and discharging air. In this invention, the heat exchanger's volume is small, the making craft is simple ,low cost, reducing the environment's heat pollution.
Description
Affiliated technical field:
The present invention relates to the Cryo Heat Tube technical field in the hot conduction technique, relate to a kind of modified low temperature heat pipe heat exchanger specifically.
Background technology:
As everyone knows, all is furnished with the central air conditioning facility in all kinds of buildings in the study of people's life and works such as large scale business, office block, hotel, hotel, workshop, and industrial stoving equipment is also being widely applied in various industrial circles, the effect of central air conditioning is for keeping indoor pure and fresh life or working environment, must get rid of the harmful substance that is produced in life activity and the production operation, introduce outdoor fresh air.Industrial stoving equipment also should be got rid of the heat after the oven dry, humid air, introduces the outdoor dry air after heating and replenishes.And central air conditioning and industrial stoving equipment are when carrying out heat exchange work, can get rid of a large amount of heat energy, not only waste thermal energy, also brought thermal pollution to environment, along with improving constantly of people's living standard and greatly developing of industry, this problem is serious day by day now, in order to recycle the energy that central air conditioning and industrial stoving equipment have, the various heat exchangers that utilize heat exchange principle also constantly appear in the present technique field, attempt to address this problem, but the heat exchanger of prior art is because heat exchange efficiency is low, manufacturing cost and use cost is high and never obtain wideling popularize application, gas-to-gas heat exchanger of the prior art generally is divided into the runner heat exchanger, plate type heat exchanger and heat exchange of heat pipe, runner exchanger heat organic efficiency is higher, shortcoming is a runner because each position of rotation of core wheel alternately is exposed to newly, between air draft, pollutant (bacterium when core wheel is in air draft and in the air draft, stench, explosive dust and gas, when and other harmful substances) contacting, can be adsorbed in the core wheel, because when this part core wheel of the turning handle of wheel forwards new wind side to, can be bacterium in the core wheel, stench, explosive dust and gas, reach other harmful substances and transfer in the new wind, polluted new wind; Being adsorbed on moisture in the core wheel simultaneously runs into cold new wind and can freeze to damage runner; Take turns the subsystem rotatable parts in addition, seal tightly inadequately, harmful substance still has the maintenance cost height in addition to the new wind one side seepage of inspiration in the therefore unavoidable air draft, needs power, the shortcoming that price is high; Plate type heat exchanger is by the heat radiation of multilayer heat sink, and air draft is by the metallic plate direct heat transfer, and heat recovery efficiency has the maintenance cost height not as runner heat exchanger height with fashion, the price height, and volume is big, and drag losses reaches heat recovery efficiency shortcoming on the low side greatly; And heat exchange of heat pipe, though heat recovery efficiency is lower slightly than runner heat exchanger, but than plate type heat exchanger height, and because heat exchange of heat pipe is conducted heat by liquid in pipe working medium, no cross pollution, newly, strict sealing between air draft, flowing in the air channel separately, mutual seepage can not occur and freeze phenomenon with new wind, compare health and safety, but general low temperature heat pipe heat exchanger also exists the manufacturing process complexity at present, the problem that cost height and heat recovery efficiency are on the low side, as China Patent No. is 93221680.3, name is called low temperature heat pipe heat exchanger and discloses a kind of heat exchange of heat pipe, be to be rolled into pipe by aluminum pipe to be extended with radiating fin outer having, inwall has the multiple tracks heat absobing channel and leads the single heat-pipe elements of making, adopt equilateral triangle to be arranged to get one's things ready in frame case by the ranks spacing, be filled with liquid working substance in the pipe, separate with median septum in each root heat-pipe elements, form two districts of new wind and air draft and realize heat exchange, since the aluminum pipe outer wall rolling radiating fin area little, between ranks, must leave the space, area of dissipation is reduced, fin can't increase ripple, heat recovery efficiency is low, each root pipe need vacuumize during manufacturing, vacuum bakeout and topping up, can not produce by batch, the manufacturing cost height, these shortcomings have all limited applying of low temperature heat pipe heat exchanger, how to improve the shortcoming of existing low temperature heat pipe heat exchanger, mention heat recovery efficiency, simplified manufacturing technique reduces and makes use cost, and easy to utilize is the problem that the current urgent need in this area solves.
Summary of the invention:
The purpose of this invention is to provide the modified low temperature heat pipe heat exchanger that a kind of heat exchanger volume is little, manufacturing process is simple, manufacturing cost and use cost is low, heat recovery efficiency is high, be convenient to promote the use of; Another object of the present invention is the method for manufacturing technology that this modified low temperature heat pipe heat exchanger of preparation also will be provided.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of modified low temperature heat pipe heat exchanger, by aluminum pipe, the aluminium sheet fin, the aluminium median septum, framework up and down, body side frame, end plate, cover plate, yoke plate and fastening bolt are formed, be characterized in: the gapped cubic rectangular form that is superimposed as between the multi-disc rectangular aluminum sheet fin, in the cubical centre of rectangle an aluminium median septum is set, spacing between each aluminium sheet fin is 1.8～3.2 millimeters, on aluminium sheet fin and aluminium median septum all to the through hole of a plurality of queueing disciplines should be arranged, pitch-row is 40～60 millimeters, the corresponding hollow aluminum pipe that inserts in through hole, pipe expanding machine rises the hollow aluminum pipe slightly, and the back forms tight fit with multi-disc rectangular aluminum sheet fin and aluminium median septum, the end plate of corresponding through hole is worn at two ends, the weldering of aluminum pipe one end is with plug, other end weldering is with the plug and the sealing of band topping up pipe, charge into ammonia liquid or acetone liquid heat-exchange working medium in the aluminum pipe, form whole aluminum pipe ammonia heat pipe heat exchanging main body or acetone heat pipe heat exchanging main body, the heat pipe heat exchanging main body is fixed on by framework up and down by fastening bolt, body side frame, end plate, cover plate, in the housing that yoke plate is formed, median septum is divided into air intake and air draft two seal areas up and down with housing, constitutes the modified low temperature heat pipe heat exchanger.
Aluminum pipe in above-mentioned described aluminum pipe ammonia heat pipe heat exchanging main body or the acetone heat pipe heat exchanging main body also can be replaced by copper pipe, thereby constitutes copper pipe heat pipe heat exchanging main body.
And in order to realize technique scheme, the present invention also provides the process for making of modified low temperature heat pipe heat exchanger, and its processing step is as follows:
1. get the raw materials ready: comprise aluminum pipe, aluminium sheet fin, aluminium median septum, up and down framework, body side frame, end plate, cover plate, yoke plate blanking processing, the flushing of deoiling, alkali is washed with pickling, hot water injection and cold water flush, baking after check;
2. aluminium sheet fin string sheet intubate processing: the rectangular block that multi-disc aluminium sheet fin is cut into required unified size, size breaks into the flange hole in accordance with regulations on the aluminium sheet fin, form the flange through hole that many rows have queueing discipline, with the gapped rectangle cube that is superimposed as of multi-disc aluminium sheet fin, the median septum that corresponding through hole is also arranged is put in the centre, after inserting many hollow aluminum pipes of isometric corresponding aperture diameter in the through hole in proper order, with pipe expanding machine many hollow aluminum pipes are risen slightly one by one, aluminum pipe outer wall and aluminium sheet fin and aluminium median septum form tight fit, with two terminations of each aluminum pipe aluminium plug welded seal, an end plug has the topping up pipe;
3. vacuum is added topping up body working medium: the aluminium string sheet pipe integral body that will hunt leak qualified is placed on movable swinging mounting and heating is caught up with in the air chamber, will vacuumize and vacuum bakeout ammonia hot pipe vacuum degree 5.8*10 in vacuum-pumping tube and the topping up pipe access evacuation liquid-filling unit
-4It is 70 degrees centigrade that pa, vacuum are caught up with the temperature degree, vacuumize that to catch up with the gas time be 1 hour; The acetone hot pipe vacuum degree is that to catch up with 120 degrees centigrade of temperature degree, pumpdown time be 30 minutes for 10pa, vacuum; The ammonia heat pipe: will vacuumize with vacuum bakeout after complete machine integral body be placed on the movable swinging mounting after with water cooling, the topping up pipe inserts and vacuumizes on the unit, with ammonia liquid purity on request with amount ammonia will pour in each root aluminum pipe and with cold welding tong sealing cold welding mouth, after carrying out the hot property detection then, carry out the protection of cold welding mouth, form whole ammonia heat pipe heat exchanging main body; The acetone heat pipe: will vacuumize with vacuum bakeout after aluminium string sheet pipe integral body with water cooling after and the purity that inject to require at topping up pipe place and the acetone liquid of amount, heating was caught up with gas 1 minute in 70 degree hot water storgaes, seal with cold welding tong then, after carrying out the hot property detection then, carry out the protection of cold welding mouth, form acetone heat pipe heat exchanging main body;
4. assemble the modified low temperature heat pipe heat exchanger: behind the equipped upper head plate in the whole aluminothermy pipe heat exchange main body two ends that will finish, put into the housing that connects to form by up and down framework, body side frame, end plate, cover plate, yoke plate, fastening bolt passes median septum respectively, end plate, framework, body side frame and cover plate are with after the aluminium sheet fin is fixedlyed connected up and down, median septum just is divided into space in the housing air intake and air draft two seal areas up and down, thereby constitutes the modified low temperature heat pipe heat exchanger.
Structure of the present invention and operation principle are such, because the aluminothermy pipe heat exchange main body among the present invention is to be superimposed as the rectangle cube by having the aluminium sheet fins with queueing discipline through hole of arranging more, after in the hole, penetrating many corresponding aluminum pipes, and by pipe expanding machine many heat pipe hollow aluminum pipes are risen respectively and slightly to make aluminium sheet fin and aluminum pipe form to closely cooperate, the aluminium sheet fin just is equivalent to the fin on the aluminum pipe outer wall, on the aluminium sheet fin, can suitably set up ripple in addition and increase heat transfer coefficient, because the increasing of heat transfer area and the raising so the heat recovery efficiency of heat transfer coefficient are improved.The centre has median septum to separate to make shell space to form new wind and air draft two seal areas up and down, pass through the fresh wind port and the exhaust outlet of flange connection air conditioner machine and dryer respectively, form two passages of new wind and air draft, an and side communication chamber outer air of two seal areas up and down, after the exhaust outlet discharge hot gas (or cold air) of opposite side connection air conditioner or dryer enters the thermal treatment zone of modified low temperature heat pipe heat exchanger, heat exchange of heat pipe and fin are heated, ammoniacal liquor in the aluminum pipe and acetone solution working medium are heated and are vaporized after the back absorbs the latent heat of vaporization, flow to the aluminum pipe other end and the aluminum pipe other end at radiating area, be full of in the fresh cold air aluminum pipe vaporization working medium in the radiating area and meet and emit the latent heat of vaporization after cold and will condense and to the radiating area heat radiation new wind-warm syndrome degree is raise, condensate liquid is by capillary force and gravity reflux.Continue to be heated.Reciprocation cycle.Just bring a large amount of heats into radiating area from the thermal treatment zone.Improved the new wind-warm syndrome degree in the radiating area.(cold recovery in like manner.But process is opposite) reduced the energy consumption of air conditioner and dryer.The EGT of modified low temperature heat pipe heat exchanger eliminating simultaneously reduces.Minimizing is to environmental thermal pollution.Thereby realized energy-conservation and reduced benefit environmental thermal pollution.The delivery temperature of general air conditioner and dryer differs 6-100 ℃ with new wind-warm syndrome degree.And behind the using modified low temperature heat pipe heat exchanger heat of recyclable said system greater than 60%.
Owing to adopted said structure principle and process, make the present invention have the following advantages: aluminum pipe and aluminium sheet fin can attenuates, reduced material consumption; The diffusing area of aluminium sheet fin strengthens, increased heat transfer coefficient, increased heat recovery efficiency thereby improve, patent of the present invention is convenient to the complete batch process of processing, be convenient to, to have a heat exchanger volume little in the present invention in sum, and manufacturing process is simple, and manufacturing cost and use cost is low, the heat recovery efficiency height is convenient to promote the use of and has been realized goal of the invention.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the partial sectional view of overlooking of Fig. 1
The specific embodiment:
Be described in further detail the present invention below in conjunction with accompanying drawing, can find out structural principle of the present invention from Fig. 1-Fig. 3, a kind of modified low temperature heat pipe heat exchanger, by aluminum pipe 1, aluminium sheet fin 2, aluminium median septum 3, end plate 4, body side frame 5, cover plate 6, framework 7 up and down, yoke plate 8 and fastening bolt 9 are formed, the gapped cubic rectangular form that is superimposed as between the multi-disc rectangular aluminum sheet fin 2, in the cubical centre of rectangle an aluminium median septum 3 is set, the spacing that each aluminium sheet fin is 2 is 3 millimeters, on aluminium sheet fin 2 and aluminium median septum 3 all to the through hole of a plurality of queueing disciplines should be arranged, pitch-row is 50 millimeters, the corresponding hollow aluminum pipe 1 that inserts in through hole, pipe expanding machine rises hollow aluminum pipe 1 slightly, and the back forms tight fits with multi-disc rectangular aluminum sheet fin 2 and aluminium median septum 3, two ends are combined with the end plate 4 of corresponding through hole, the weldering of aluminum pipe 1 one ends is with plug, other end weldering is with the plug and the sealing of band topping up pipe, charge into ammonia liquid or acetone liquid heat-exchange working medium in the aluminum pipe 1, form whole aluminothermy pipe heat exchange main body, constitute ammonia-aluminium low temperature heat pipe heat exchanger when charging into ammonia liquid in the aluminum pipe 1, be used to reclaim the heat of air-conditioning system air draft, constitute acetone-aluminium low temperature heat pipe heat exchanger when charging into acetone liquid in the aluminum pipe 1, be used to reclaim the heat of industrial stoving system air draft.By in the housing that fastening bolt 9 is fixed on by body side frame 5, framework 7, end plate 4, cover plate 6 and yoke plate 8 are formed up and down, median septum 3 is divided into air intake and air draft two seal areas up and down with housing, thereby constitutes the modified low temperature heat pipe heat exchanger with the heat pipe heat exchanging main body.
The processing technology thereof step of modified low temperature heat pipe heat exchanger is as follows:
1. get the raw materials ready: comprise aluminum pipe, aluminium sheet fin, aluminium median septum, up and down framework, body side frame, end plate, cover plate, yoke plate blanking processing, the flushing of deoiling, alkali is washed with pickling, hot water injection and cold water flush, baking after check;
2. aluminium sheet fin string sheet intubate processing: the rectangular block that multi-disc aluminium sheet fin is cut into required unified size, size breaks into the flange hole in accordance with regulations on the aluminium sheet fin, form the flange through hole that many rows have queueing discipline, multi-disc aluminium sheet fin gap is superimposed as the rectangle cube, the median septum that corresponding through hole is also arranged is put in the centre, after inserting many hollow aluminum pipes of isometric corresponding aperture diameter in the through hole in proper order, with pipe expanding machine many hollow aluminum pipes are risen slightly one by one, aluminum pipe outer wall and aluminium sheet fin and aluminium median septum form tight fit, with two terminations of each aluminum pipe aluminium plug welded seal, an end plug has the topping up pipe;
3. vacuum is added topping up body working medium: the aluminium string sheet pipe integral body that will hunt leak qualified is placed on movable swinging mounting and heating is caught up with in the air chamber, will vacuumize and vacuum bakeout ammonia hot pipe vacuum degree 5.8*10 in vacuum-pumping tube and the topping up pipe access evacuation liquid-filling unit
-4It is 70 degrees centigrade that pa, vacuum are caught up with the temperature degree, vacuumize that to catch up with the gas time be 1 hour; The acetone hot pipe vacuum degree is that to catch up with 120 degrees centigrade of temperature degree, pumpdown time be 30 minutes for 10pa, vacuum; The ammonia heat pipe: will vacuumize with vacuum bakeout after complete machine integral body be placed on the movable swinging mounting after with water cooling, the topping up pipe inserts and vacuumizes on the unit, with ammonia liquid on request purity and amount pours in each root aluminum pipe and with cold welding tong sealing cold welding mouth, carry out then carrying out the protection of cold welding mouth after hot property detects, form whole ammonia heat pipe heat exchanging main body; The acetone heat pipe: will vacuumize with vacuum bakeout after aluminium string sheet pipe integral body with water cooling after and the purity that inject to require at topping up pipe place and the acetone liquid of amount, heating catches up with gas to seal with cold welding tong after 1 minute in 70 degree hot water storgaes, after carrying out the hot property detection then, carry out the protection of cold welding mouth, form acetone heat pipe heat exchanging main body;
4. assemble the modified low temperature heat pipe heat exchanger: behind the equipped upper head plate in the whole aluminothermy pipe heat exchange main body two ends that will finish, put into the housing that connects to form by up and down framework, body side frame, end plate, cover plate, yoke plate, fastening bolt passes median septum respectively, end plate, framework, body side frame and cover plate are with after the aluminium sheet fin is fixedlyed connected up and down, median septum just is divided into space in the housing air intake and air draft two seal areas up and down, thereby constitutes the modified low temperature heat pipe heat exchanger.
Claims (3)
1. modified low temperature heat pipe heat exchanger, by aluminum pipe (1), aluminium sheet fin (2), aluminium median septum (3), end plate (4), body side frame (5), cover plate (6), framework (7) up and down, yoke plate (8) and fastening bolt (9) are formed, it is characterized in that: the gapped cubic rectangular form that is superimposed as between the multi-disc rectangular aluminum sheet fin (2), in the cubical centre of rectangle an aluminium median septum (3) is set, the spacing of (2) is 1.8～3.2 millimeters between each aluminium sheet fin, on aluminium sheet fin (2) and aluminium median septum (3) all to the through hole of a plurality of queueing disciplines should be arranged, pitch-row is 40～60 millimeters, the corresponding hollow aluminum pipe (1) that inserts in through hole, pipe expanding machine rises hollow aluminum pipe (1) slightly, and the back forms tight fit with multi-disc rectangular aluminum sheet fin (2) and aluminium median septum (3), the end plate (4) of corresponding through hole is worn at two ends, the weldering of aluminum pipe (1) one end is with plug, other end weldering is with the plug and the sealing of band topping up pipe, aluminum pipe (1) two ends welded seal, charge into ammonia liquid or acetone liquid heat-exchange working medium in the aluminum pipe (1), form whole aluminothermy pipe heat exchange main body, the heat pipe heat exchanging main body is fixed on by body side frame (5) by fastening bolt (9), framework (7) up and down, end plate (4), cover plate (6), in the housing that yoke plate (8) is formed, median septum (3) is divided into air intake and air draft two seal areas up and down with housing, thereby constitutes the modified low temperature heat pipe heat exchanger.
2. according to the described modified low temperature heat pipe heat exchanger of claim 1, it is characterized in that: the aluminum pipe (1) in described aluminum pipe ammonia heat pipe heat exchanging main body or the acetone heat pipe heat exchanging main body can be replaced by copper pipe, then constitutes copper pipe heat pipe heat exchanging main body.
3. process of making the described modified low temperature heat pipe heat exchanger of claim 1, its processing step is as follows:
A. get the raw materials ready: comprise aluminum pipe, aluminium sheet fin, aluminium median septum, up and down framework, body side frame, end plate, cover plate, yoke plate blanking processing, the flushing of deoiling, alkali is washed with pickling, hot water injection and cold water flush, baking after check;
B. aluminium sheet fin string sheet intubate processing: the rectangular block that multi-disc aluminium sheet fin is cut into required unified size, size breaks into the flange hole in accordance with regulations on the aluminium sheet fin, form the flange through hole that many rows have queueing discipline, multi-disc aluminium sheet fin gap is superimposed as the rectangle cube, the median septum that corresponding through hole is also arranged is put in the centre, after inserting many hollow aluminum pipes of isometric corresponding aperture diameter in the through hole in proper order, with pipe expanding machine many hollow aluminum pipes are risen slightly one by one, aluminum pipe outer wall and aluminium sheet fin and aluminium median septum form tight fit, with two terminations of each aluminum pipe aluminium plug welded seal, an end plug has the topping up pipe;
C. vacuum is added topping up body working medium: the aluminium string sheet pipe integral body that will hunt leak qualified is placed on movable swinging mounting and heating is caught up with in the air chamber, will vacuumize and vacuum bakeout ammonia hot pipe vacuum degree 5.8*10 in vacuum-pumping tube and the topping up pipe access evacuation liquid-filling unit
-4It is 70 degrees centigrade that pa, vacuum are caught up with the temperature degree, vacuumize that to catch up with the gas time be 1 hour; The acetone hot pipe vacuum degree is that to catch up with 120 degrees centigrade of temperature degree, pumpdown time be 30 minutes for 10pa, vacuum; The ammonia heat pipe: will vacuumize with vacuum bakeout after complete machine integral body be placed on the movable swinging mounting after with water cooling, the topping up pipe inserts and vacuumizes on the unit, with ammonia liquid on request purity and amount pours in each root aluminum pipe and with cold welding tong sealing cold welding mouth, after carrying out the hot property detection then, carry out the protection of cold welding mouth, form whole ammonia heat pipe heat exchanging main body; The acetone heat pipe: will vacuumize with vacuum bakeout after aluminium string sheet pipe integral body with water cooling after and the purity that inject to require at topping up pipe place and the acetone liquid of amount, heating was caught up with gas 1 minute in 70 degree hot water storgaes, seal with cold welding tong then, after carrying out the hot property detection then, carry out the protection of cold welding mouth, form acetone heat pipe heat exchanging main body;
D. assemble the modified low temperature heat pipe heat exchanger: behind the equipped upper head plate in the whole aluminothermy pipe heat exchange main body two ends that will finish, put into the housing that connects to form by up and down framework, body side frame, end plate, cover plate, yoke plate, fastening bolt passes median septum, end plate respectively, framework, body side frame and cover plate be with after the aluminium sheet fin is fixedlyed connected up and down, median septum just is divided into space in the housing air intake and air draft two seal areas up and down, thereby constitutes the modified low temperature heat pipe heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101229003A CN100516753C (en) | 2007-07-10 | 2007-07-10 | Improved low temperature heat pipe heat exchanger |
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| CNB2007101229003A CN100516753C (en) | 2007-07-10 | 2007-07-10 | Improved low temperature heat pipe heat exchanger |
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| CN100516753C true CN100516753C (en) | 2009-07-22 |
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| CN103509124A (en) * | 2012-06-14 | 2014-01-15 | 河南永昌飞天淀粉糖有限公司 | New dextrin drying tower tail gas recovery process |
| CN108167790A (en) * | 2018-02-11 | 2018-06-15 | 中国科学院工程热物理研究所 | For photo-thermal integrated device, radiator and the LED light under superelevation heat flow density |
| CN111189316A (en) * | 2020-02-16 | 2020-05-22 | 扬州大学 | Grain drying system based on heat pipe waste heat recovery type water source heat pump |
| CN114413512B (en) * | 2022-01-19 | 2024-04-16 | 上海本家空调系统有限公司 | Engine-driven air source heat pump |
| CN115435425A (en) * | 2022-11-08 | 2022-12-06 | 苏州恒境环保科技有限公司 | Plane plate type heat recovery ventilation device |
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Owner name: BEIJING DETIAN ENERGY SAVING EQUIPMENT CO., LTD. Free format text: FORMER OWNER: WANG SHIYING Effective date: 20150119 |
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Free format text: CORRECT: ADDRESS; FROM: 100043 SHIJINGSHAN, BEIJING TO: 102601 DAXING, BEIJING |
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Effective date of registration: 20150119 Address after: 102601 Beijing city Daxing District Panggezhuang Zhen Nan Li Cun Wei Hui Qu Patentee after: Beijing Detian energy saving equipment Co. Ltd. Address before: 100043, No. 18, building 3, octagonal South Road, Beijing, Shijingshan District Patentee before: Wang Shiying |
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Granted publication date: 20090722 Termination date: 20150710 |
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