CN103932373B - Curing barn - Google Patents
Curing barn Download PDFInfo
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- CN103932373B CN103932373B CN201410179407.5A CN201410179407A CN103932373B CN 103932373 B CN103932373 B CN 103932373B CN 201410179407 A CN201410179407 A CN 201410179407A CN 103932373 B CN103932373 B CN 103932373B
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- hot air
- barn
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- air circulation
- flue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a curing barn. The curing barn comprises two curing barn units which are identical and arranged in parallel. Each curing barn unit comprises a heating chamber 2 and a tobacco curing chamber 3, wherein the heating chamber 2 comprises a hot air circulation chamber 201 and a machine chamber 202, the hot air circulation chamber 201 is adjacent to the tobacco curing chamber 3, an air duct wallboard 5 is arranged between the hot air circulation chamber 201 and the machine chamber 202, a moisture exhaust air duct 6 is arranged on the bottom surface of the hot air circulation chamber 201, an air outlet of the moisture exhaust air duct 6 is formed in the air duct wallboard 5, a heat pump evaporator 7 is arranged on the bottom surface of the machine chamber 202, the air outlet of the moisture exhaust air duct 6 is opposite to the heat pump evaporator 7, a condenser 8 is arranged in the hot air circulation chamber 201, and an auxiliary heating device 9 is arranged over the condenser 8. By the adoption of the curing barn, waste heat can be recycled, the occupied area can be reduced, heat loss can be reduced, and it can be guaranteed that the temperature of the curing barn is always at a set process temperature through the additional arrangement of the auxiliary heating devices.
Description
Technical field
The present invention relates to flue-cured tobacco field, particularly relate to a kind of agricultural cured tobacco curing house.
Background technology
In existing tobacco flue-curing, the designing and employing of barn is more and more common and ripe, but more or less still there are some problems, such as: outside the direct discharge chamber of damp-heat air that tobacco flue-curing house hydrofuge air channel is discharged, fully do not utilized, and directly cause the pollution of environment outside discharge chamber, the waste of the energy; Meanwhile, tobacco leaf planting has certain regionality, at certain region establishing in large scale, after the tobacco leaf maturity period arrives, need at short notice to concentrate baking processing, bakery majority in tobacco leaf planting district is concentrated and is built, barn is independent distribution generally, and the body of wall of barn all can scatter and disappear a part of heat, and has certain distance between barn between two, wasting space, design a kind of disjunctor barn, between two barns, share a wall, scattering and disappearing of heat can be reduced, save floor occupying area, raise the efficiency; Further, the agricultural barn of air source heat pump is generally after heat as required carrys out selected source pump, must rational deployment heating air duct, makes air draft air quantity meet the needs of heat pump condenser heat exchange, guarantees heat pump stable operation; Controlled circulation air quantity makes wind direction reasonable simultaneously, meets the requirement of baking material, and discharges hot and humid air in barn.Heating capacity and the environment temperature relation of air source heat pump are huge, under normal circumstances, heat pump heating capacity can meet the baking needs of selected agricultural product, but when some extreme weather occurs suddenly, such as lower the temperature suddenly, whole bake process temperature reaches and is difficult to reach setting technological requirement, and the quality of baking is just difficult to ensure, and then will cause great loss.
Based on above-mentioned situation, a kind of Waste Heat Recovery being provided, saving floor occupying area, reducing heat loss and by increasing assisted heating device to guarantee that the barn moment keeps the agricultural barn of setting technological temperature requirement extremely urgent, and there is huge popularization and use value.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art provide a kind of can Waste Heat Recovery, saving floor occupying area, reducing heat loss and by increasing assisted heating device to guarantee that the flue-cured tobacco room moment keeps the barn of setting technological temperature requirement.
Technical scheme of the present invention is achieved in that a kind of barn, comprise two identical and barn unit be set up in parallel, barn units shared one wall body described in two, described barn unit comprises heating clamber and flue-cured tobacco room, described heating clamber comprises hot air circulation room and machine hall, described hot air circulation room is adjacent with described flue-cured tobacco room, between described hot air circulation room and described machine hall, air channel wallboard is set, the bottom surface of described hot air circulation room is provided with the hydrofuge air channel running through whole hot air circulation room, the air inlet in described hydrofuge air channel is opened in flue-cured tobacco indoor, the air outlet in described hydrofuge air channel is opened on the wallboard of air channel, bottom surface is provided with evaporator with heat pump in described machine hall, the air outlet in described hydrofuge air channel is just to described evaporator with heat pump, described hot air circulation indoor are provided with condenser, auxiliary heater is provided with directly over described condenser, be provided with circulating fan directly over described auxiliary heater, described auxiliary heater comprises support and is arranged side by side and is fixed on the U-shaped heating tube on support.
Both sides, described flue-cured tobacco room arrange the first side wall and the second side wall, and the flue-cured tobacco room of barn unit described in two shares the second side wall, and the first side wall of the flue-cured tobacco room of barn unit described in two is provided with observation window.
Described hydrofuge air channel is arranged on the centre position of bottom surface, described hot air circulation room, and the distance of the air outlet in described evaporator with heat pump and described hydrofuge air channel is 25cm to 40cm.
The centre position on the body of wall top between described hot air circulation room and described flue-cured tobacco room offers hot air inlet, air channel wallboard surface thereof above described circulating fan is fixedly installed a wind deflector relative with described hot air inlet, the upper end of described wind deflector is fixedly connected with the top inner surface of hot air circulation room, and the angle of described wind deflector and horizontal plane is 50 ~ 70 °.
A body of wall of described hot air circulation air compartment offers with hot air circulation air compartment with wide circulating fan service ports and condenser service ports, described circulating fan service ports and described condenser service ports all arrange AD.
Described first side wall adopts the thick polyurethane thermal insulation board of 50 ㎜ to make.
Described auxiliary heater is arranged on 400 ㎜ places above condenser.
Described U-shaped heating tube external helicoid is provided with corrugated fin.
Described support is fixedly connected with by porcelain knob with described hot air circulation chamber interior framework.
The good effect that technical scheme of the present invention produces is as follows: barn of the present invention, and comprise two identical and barn unit be set up in parallel, barn units shared one wall body described in two, such setting not only decreases floor space, simultaneously cost-saving; Both sides, described flue-cured tobacco room arrange the first side wall and the second side wall, the flue-cured tobacco room of barn unit described in two shares the second side wall, first side wall of the flue-cured tobacco room of barn unit described in two is provided with observation window, two flue-cured tobacco rooms share the heat loss that the second side wall can reduce flue-cured tobacco room, first side wall offers observation window, observe the indoor flue-cured tobacco situation of flue-cured tobacco meeting can not to affect while two barn unit next-door neighbours are arranged, and such good looking appearance is set, compact conformation.
Described barn unit comprises heating clamber and flue-cured tobacco room, described heating clamber comprises hot air circulation room and machine hall, described hot air circulation room is adjacent with described flue-cured tobacco room, between described hot air circulation room and described machine hall, air channel wallboard is set, the bottom surface of described hot air circulation room is provided with the hydrofuge air channel running through whole hot air circulation room, the air inlet in described hydrofuge air channel is opened in flue-cured tobacco indoor, the air outlet in described hydrofuge air channel is opened on the wallboard of air channel, bottom surface is provided with evaporator with heat pump in described machine hall, the air outlet in described hydrofuge air channel is just to described evaporator with heat pump, the high temperature hot and humid gas of flue-cured tobacco indoor blows to evaporator with heat pump by the air outlet in hydrofuge air channel, improve the environment temperature around evaporator with heat pump, the evaporating temperature of evaporator with heat pump is improve with this, improve heat pump system performance coefficient, used heat obtains rationally effective utilization, reach the effect that recycling waste heat reclaims.
Described hydrofuge air channel is arranged on the centre position of bottom surface, described hot air circulation room, the distance of the air outlet in described evaporator with heat pump and described hydrofuge air channel is 25cm to 40cm, this distance can just ensure that the high temperature moisture of the air outlet hydrofuge in hydrofuge air channel blows to evaporator with heat pump more, wind speed is moderate and flowing is more even, is the optimum distance that evaporator with heat pump improves evaporating temperature.
Above the condenser of hot air circulation room, auxiliary heater is set, when running into extreme weather or lowering the temperature suddenly, the U-shaped heating tube in auxiliary heater can be opened, rapid supplying heat, guarantee that whole bake process temperature reaches setting technological requirement, ensure baking properties; Described U-shaped heating tube external helicoid is provided with corrugated fin, arrange corrugated fin make heating tube dispel the heat faster evenly; Described support is fixedly connected with by porcelain knob with hot air circulation chamber interior framework, is connected the heat loss preventing auxiliary heater by porcelain knob; Described auxiliary heater is arranged on 400 ㎜ places above condenser, and condenser and auxiliary heater keep the distance of 400 ㎜ to make to start post-condenser at auxiliary heater being in good working order.
The centre position on the body of wall top between described hot air circulation room and described flue-cured tobacco room offers hot air inlet, air channel wallboard surface thereof above described circulating fan is fixedly installed a wind deflector relative with described hot air inlet, the upper end of described wind deflector is fixedly connected with the top inner surface of hot air circulation room, the angle of described wind deflector and horizontal plane is 50 ~ 70 °, the position corresponding at hot air inlet arranges wind deflector, when circulating fan carries out exhausting, the flow direction of hot blast is changed by wind deflector, make that hot blast is more flows to hot air inlet faster, improve the baking efficiency of flue-cured tobacco indoor, the angle of described wind deflector and horizontal plane is 50 ~ 70 °, and under this angle, the fastest air quantity of wind speed of wind deflector guiding hot air inlet is maximum.
A body of wall of described hot air circulation air compartment offers with hot air circulation air compartment with wide circulating fan service ports and condenser service ports, described circulating fan service ports and described condenser service ports all arrange AD, convenient working condition of observing condenser and circulating fan is keeped in repair condenser and circulating fan by service ports simultaneously, easy to maintenance.
Described first side wall adopts the thick polyurethane thermal insulation board of 50 ㎜ to make, polyurethane thermal insulation board high insulating effect, and reduce the heat loss of flue-cured tobacco indoor, and material is generally easy to get, cost is low.
Present invention optimizes heat pump barn space layout, improve energy recovery efficiency by the space layout changing flue-cured tobacco room and heating clamber, saved the energy, improve fire-protection rating, added service life.
Accompanying drawing explanation
Fig. 1 is the outside plan structure schematic diagram of barn of the present invention.
Fig. 2 is the outer side TV structure schematic diagram of flue-cured tobacco room of the present invention.
Fig. 3 is the inside partial structurtes schematic diagram of barn of the present invention.
Fig. 4 is the internal structure schematic diagram of hot air circulation room of the present invention.
Fig. 5 is the external structure schematic diagram of hot air circulation room of the present invention.
Fig. 6 is the partial structurtes schematic diagram of auxiliary heater of the present invention.
Fig. 7 is the main TV structure schematic diagram of barn insulated wall 11 of the present invention.
Detailed description of the invention
A kind of barn, as shown in Fig. 1,2,3,4,5,6, comprise two identical and barn unit be set up in parallel, described barn unit comprises heating clamber 2 and flue-cured tobacco room 3, the both sides of each described flue-cured tobacco room all arrange the first side wall 301 and the second side wall 302, the heating clamber 2 of two barn unit shares the second side wall 302, first side wall 301 of two flue-cured tobacco rooms 3 all offers three observation windows 4, the height of three observation windows 4 with in flue-cured tobacco room 3 three to arrange the height of smoke hanging shelf identical, is convenient to the baking situation of observing tobacco leaf in different smoke hanging shelf respectively.Described first side wall 301 adopts the thick polyurethane thermal insulation board of 50 ㎜ to make, polyurethane thermal insulation board high insulating effect, and reduce the heat loss of flue-cured tobacco indoor, and material is generally easy to get, cost is low.
Described heating clamber 2 comprises hot air circulation room 201 and machine hall 202, described hot air circulation room 201 is adjacent with described flue-cured tobacco room 3, between described hot air circulation room 201 and described machine hall 202, air channel wallboard 5 is set, the bottom surface of described hot air circulation room 201 is provided with the hydrofuge air channel 6 running through whole hot air circulation room, described hydrofuge air channel 6 is arranged on the centre position on bottom surface, described hot air circulation room, the air inlet in described hydrofuge air channel 6 is hydrofuge air inlet 18, described hydrofuge air inlet 18 is opened in flue-cured tobacco room 3, the air outlet in described hydrofuge air channel 6 is hydrofuge air port 1, hydrofuge air port 1 is opened on air channel wallboard 5, described hydrofuge air port 1 arranges hydrofuge air door.Bottom surface is provided with evaporator with heat pump 7 in described machine hall 202, and the air outlet in described hydrofuge air channel 6 is just to described evaporator with heat pump 7, and described evaporator with heat pump 7 is 25cm to 40cm with the distance of the air outlet in described hydrofuge air channel 6; When hydrofuge air door is opened, discharge the damp-heat air speed of flue-cured tobacco indoor generally at 1.0-1.3m/s, evaporator with heat pump is blowed at a certain angle under the guiding of hydrofuge air door, improve the environment temperature around evaporator with heat pump 7, reach the object improving evaporator with heat pump 7 coefficient of performance, the method is easy, can reach the object that Waste Heat Recovery utilizes.When hydrofuge air door closed condition, hot blast circulates in flue-cured tobacco room 3, proves the damp-heat air of being discharged by flue-cured tobacco room 3 through test, 60%-80% is had to be recovered utilization, flue-cured tobacco seasonal temperature is generally at 20-30 DEG C, and the comprehensive thermal effect of evaporator with heat pump 7 compares at 3.5-4.5, energy-saving effect 12%-15%.
Condenser 8 is provided with in described hot air circulation room 201, auxiliary heater 9 is provided with directly over described condenser 8, described auxiliary heater 9 is arranged on 400 ㎜ places above condenser 8, circulating fan 10 is provided with directly over described auxiliary heater 9, described auxiliary heater 9 comprises support 901 and is arranged side by side and is fixed on the U-shaped heating tube 902 on support 901, described U-shaped heating tube 902 external helicoid is provided with corrugated fin, described support 901 is fixedly connected with by porcelain knob with described hot air circulation room 201 inner frame, to reduce heat loss.Described U-shaped heating tube power is 3.3 kilowatts/root, adds up to 6, and general power is 20 kilowatts; Described support adopts 40 ㎜ * 40 ㎜ angle bar to make.
Described hot air circulation room 201 comprises four sides wall and circular chamber top board 15, the wall shared with flue-cured tobacco room is barn insulated wall 11, corresponding with barn insulated wall is air channel wallboard 5, and two face walls be arranged between barn insulated wall 11 and air channel wallboard 5 are respectively front wall and Hou Qiang.Described barn insulated wall 11 crown center position offers hot air inlet 12, the both sides of hydrofuge air inlet 18 offer two cold wind return air inlets 13, the specification of described hot air inlet 12 is 1800 ㎜ * 400 ㎜, the specification of described cold wind return air inlet 13 is 500 ㎜ * 400 ㎜, the specification in described hydrofuge air port 1 is 800 ㎜ * 400 ㎜, described hot air inlet 12 is arranged with the positional symmetry in cold wind return air inlet 13, described hydrofuge air port 1, described cold wind return air inlet 13 place arranges wire netting, and mesh is less than 30 ㎜ * 30 ㎜.Wind deflector 14 is provided with above the circulating fan 10 at corresponding air channel wallboard 5 top of described hot air inlet 12, one end of described wind deflector 14 is fixed on air channel wallboard 5, the other end of described wind deflector 14 is fixed on circular chamber top board 15, described wind deflector 14 is 60 ° with the angle of horizontal plane, wind deflector 14 arranges the flow direction that can change hot blast above circulating fan, makes that hot blast is more flows to hot air inlet quickly.
The front wall of described hot air circulation room 201 offers circulating fan service ports 16, high 500 ㎜ of circulating fan service ports 16, with hot air circulation room with wide, in circulating fan service ports, circulating fan AD is installed, described circulating fan AD is provided with transparent maintenance window, the working condition of the inside circulating fan can be seen through maintenance window, circulating fan AD adopts color steel polyurethane sheet to be made, thickness is 5 ㎜, installs sealant around circulating fan, prevents from leaking out.
Offer with hot air circulation room with wide condenser service ports 17 in the below of the front wall cocycle fan repair mouth 16 of described hot air circulation room 201, high 500 ㎜ of condenser service ports, in condenser service ports, condenser AD is installed, described condenser AD is provided with transparent maintenance window, can see the working condition of the inside condenser through maintenance window, condenser AD adopts color steel polyurethane sheet to be made, and thickness is 5 ㎜, around condenser, sealant is installed, prevents from leaking out.
Claims (9)
1. a barn, it is characterized in that: comprise two identical and barn unit be set up in parallel, barn units shared one wall body described in two, described barn unit comprises heating clamber (2) and flue-cured tobacco room (3), described heating clamber (2) comprises hot air circulation room (201) and machine hall (202), described hot air circulation room (201) is adjacent with described flue-cured tobacco room (3), air channel wallboard (5) is set between described hot air circulation room (201) and described machine hall (202), the bottom surface of described hot air circulation room (201) is provided with the hydrofuge air channel (6) running through whole hot air circulation room, the air inlet of described hydrofuge air channel (6) is opened in flue-cured tobacco room (3), the air outlet of described hydrofuge air channel (6) is opened on air channel wallboard (5), described machine hall (202) bottom surface is provided with evaporator with heat pump (7), the air outlet of described hydrofuge air channel (6) is just to described evaporator with heat pump (7), condenser (8) is provided with in described hot air circulation room (201), auxiliary heater (9) is provided with directly over described condenser (8), be provided with circulating fan (10) directly over described auxiliary heater (9), described auxiliary heater (9) comprises support (901) and is arranged side by side and is fixed on the U-shaped heating tube (902) on support.
2. a kind of barn as claimed in claim 1, it is characterized in that: described flue-cured tobacco room (3) both sides arrange the first side wall (301) and the second side wall (302), the flue-cured tobacco room (3) of barn unit described in two shares the second side wall (302), and first side wall (301) of the flue-cured tobacco room (3) of barn unit described in two is provided with observation window (4).
3. a kind of barn as claimed in claim 1, it is characterized in that: described hydrofuge air channel (6) is arranged on the centre position of described hot air circulation room (201) bottom surface, described evaporator with heat pump (7) is 25cm to 40cm with the distance of the air outlet of described hydrofuge air channel (6).
4. a kind of barn as claimed in claim 1, it is characterized in that: the centre position on the body of wall top between described hot air circulation room (201) and described flue-cured tobacco room (3) offers hot air inlet (12), air channel wallboard (5) surface thereof of described circulating fan (10) top is fixedly installed a wind deflector (14) relative with described hot air inlet (12), the upper end of described wind deflector (14) is fixedly connected with the top inner surface of hot air circulation room (201), and described wind deflector (14) is 50 ~ 70 ° with the angle of horizontal plane.
5. a kind of barn as claimed in claim 1, it is characterized in that: a body of wall of described hot air circulation air compartment (201) offers with hot air circulation air compartment (201) with wide circulating fan service ports (16) and condenser service ports (17), described circulating fan service ports (16) and described condenser service ports (17) all arrange AD.
6. a kind of barn as claimed in claim 2, is characterized in that: described first side wall (301) adopts the thick polyurethane thermal insulation board of 50 ㎜ to make.
7. a kind of barn as claimed in claim 1, is characterized in that: described auxiliary heater (9) is arranged on 400 ㎜ places, condenser (8) top.
8. a kind of barn as claimed in claim 1, is characterized in that: described U-shaped heating tube (902) external helicoid is provided with corrugated fin.
9. a kind of barn as claimed in claim 1, is characterized in that: described support (901) is fixedly connected with by porcelain knob with described hot air circulation room (201) inner frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179407.5A CN103932373B (en) | 2014-04-30 | 2014-04-30 | Curing barn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179407.5A CN103932373B (en) | 2014-04-30 | 2014-04-30 | Curing barn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103932373A CN103932373A (en) | 2014-07-23 |
| CN103932373B true CN103932373B (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410179407.5A Active CN103932373B (en) | 2014-04-30 | 2014-04-30 | Curing barn |
Country Status (1)
| Country | Link |
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| CN (1) | CN103932373B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104664582A (en) * | 2014-12-30 | 2015-06-03 | 湖北科阳节能设备有限公司 | High temperature heat pump-based waste heat recovery curing barn |
| CN107212453B (en) * | 2016-03-22 | 2022-05-24 | 上海东健净化股份有限公司 | Heat pipe type full-automatic tobacco baking machine |
| CN105661616A (en) * | 2016-04-05 | 2016-06-15 | 贵州大学 | Tobacco curing barn with diversion structure |
| CN106509965B (en) * | 2016-11-22 | 2018-07-20 | 河南佰衡节能科技股份有限公司 | A kind of novel energy-conserving flue-cured tobacco equipment |
| CN109043630B (en) * | 2018-09-30 | 2023-12-15 | 无锡聚智节能技术有限公司 | Baking oven for baking tobacco |
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| CN202635572U (en) * | 2012-04-19 | 2013-01-02 | 江苏科地现代农业有限公司 | Polyurethane detachable plate-type bulk curing barn device |
| CN202890433U (en) * | 2012-06-20 | 2013-04-24 | 云南华意科技有限公司 | Tobacco curing room |
| CN103099302A (en) * | 2013-03-06 | 2013-05-15 | 东莞市正旭新能源设备科技有限公司 | Intelligent energy-saving dehumidification integrated curing barn for curing tobaccos |
| CN203860428U (en) * | 2014-04-30 | 2014-10-08 | 河南佰衡节能技术有限公司 | Curing chamber |
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2014
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173596U (en) * | 1981-04-30 | 1982-11-01 | ||
| JP2009100666A (en) * | 2007-10-22 | 2009-05-14 | Sanshu Sangyo Co Ltd | Leaf tobacco dryer for energy-saving type, and method for controlling leaf tobacco drying |
| CN201219479Y (en) * | 2008-06-30 | 2009-04-15 | 宗树林 | Residual heat sharing close-packed tobacco flue-curing house |
| CN201640431U (en) * | 2010-03-10 | 2010-11-24 | 河南农业大学 | Side-by-side conjoined dense flue-cured tobacco chamber |
| CN202635572U (en) * | 2012-04-19 | 2013-01-02 | 江苏科地现代农业有限公司 | Polyurethane detachable plate-type bulk curing barn device |
| CN102697160A (en) * | 2012-06-07 | 2012-10-03 | 昆明贵勋科技有限公司 | Energy-saving tobacco flue-curing house capable of effectively recycling dehumidification heat energy |
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| CN103932373A (en) | 2014-07-23 |
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Inventor after: Zhao Yinxing Inventor after: Zhang Zaixin Inventor after: Zi Weiqi Inventor after: Li Yong Inventor before: Zhao Yinxing Inventor before: Zhang Zaixin Inventor before: Li Yong |
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Address after: Cologne Xinxiang Avenue East of Henan province 453000 City neighborhood 17 Patentee after: HENAN BAIHENG ENERGY SAVING TECHNOLOGY CO., LTD. Address before: Cologne Xinxiang Avenue East of Henan province 453000 City neighborhood 17 Patentee before: HENAN BAIHENG ENERGY SAVING TECHNOLOGY CO., LTD. |