CN100344912C - Air dehumidifier - Google Patents
Air dehumidifier Download PDFInfo
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- CN100344912C CN100344912C CNB2006100506023A CN200610050602A CN100344912C CN 100344912 C CN100344912 C CN 100344912C CN B2006100506023 A CNB2006100506023 A CN B2006100506023A CN 200610050602 A CN200610050602 A CN 200610050602A CN 100344912 C CN100344912 C CN 100344912C
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- Prior art keywords
- solution
- air
- solution tank
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- tank
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- 239000000945 filler Substances 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 145
- 239000007921 spray Substances 0.000 claims description 39
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000007791 dehumidification Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
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Abstract
The invention discloses an air dehumidifier. The air dehumidifier is provided with a compression module, a solution module, a fan module, a controller and a frame; the compression module is sequentially connected with a compressor, a four-way reversing valve, a condenser, a drying filter, a throttle valve, an evaporator and the like, a condensate tank is arranged below the evaporator, and a water collecting tank is arranged below the condenser; the fan module is provided with an air supply fan, a fan baffle plate and an air exhaust fan from top to bottom; the solution module is provided with an upper layer spraying device, an upper layer filler, an upper solution tank, a lower layer spraying device, a lower layer filler and a lower solution tank from top to bottom, and a solution pump is arranged in the tank; the frame is provided with a top plate, a side plate, a bottom plate, a vertical column, an air inlet, an air supply outlet and an air outlet. The invention combines the compression heat pump system and the solution dehumidification technology, and the solution regeneration utilizes the heat discharge of the compression heat pump system, thereby meeting the environmental requirement of drying and comfort. The dehumidifier has air ports in a plurality of directions, is simple and flexible to install, and can meet the requirements of various installation places.
Description
Technical field
The present invention relates to a kind of air dehumidifier.
Background technology
In conventional vapor compression type refrigerating system, dehumidifying is to be reduced to by the temperature with cooling coil to be lower than the realization of air dew point temperature.But under super-humid conditions, this dehumanization method efficient is not high, and the indoor thermal and humidity environment that is produced also makes the people do not feel like oneself.The common practice of people is to turn down the design temperature of cooling coil, and this has increased the refrigeration power consumption again.
The principle of solution dehumidification is: in the aqueous solution of some salt (as calcium chloride, lithium chloride) owing to be mixed with the salt quasi-molecule, the concentration of hydrone is reduced, make the stream molecule pressure of salt water surface saturated air layer will be lower than the synthermal stream molecule pressure of water surface saturated air layer down.So when airborne stream molecule pressure during greater than the stream molecule pressure of salt water surface, airborne water vapour molecule will shift to salt solution, promptly be absorbed by salt solution.In temperature one regularly, saline solution concentration is big more, it is just low more that water vapour molecule pressure is gone up on its surface, wettability power is just strong more, even when brine temp is higher than the dew-point temperature of air, also can absorb airborne moisture, after saline solution absorbs airborne hydrone, its concentration will reduce gradually, and wettability power weakens corresponding.Make wherein moisture minimizing by evaporation regeneration again, recover the wettability power of saline solution saline solution.
Summary of the invention
The purpose of this invention is to provide a kind of air dehumidifier.
Air dehumidifier has compression module, solution module, blower fan module, controller and framework; Compression module is connected with compressor, four-way change-over valve, condenser, device for drying and filtering, choke valve, evaporimeter etc. in turn, and evaporimeter has tank with fixed attention, and condenser has water leg; Blower fan module has breeze fan, blower fan dividing plate, air draft blower fan from top to bottom, and breeze fan is fixed on the breeze fan support, and the air draft blower fan is fixed on the air draft fan supporter, and the blower fan dividing plate is fixed on the framework; Framework has top board, side plate, base plate, column, air inlet, air outlet, exhaust outlet.
Described solution module is divided into two-layer up and down, and the upper strata has upper strata spray equipment, upper strata filler from top to bottom, goes up solution tank, has first solution pump that links to each other with the upper strata spray equipment on last solution tank; Lower floor has lower floor's spray equipment, lower floor's filler, solution tank down from top to bottom, has second solution pump that links to each other with the lower floor spray equipment with the upper strata spray equipment on solution tank down.
Be connected with heat exchanger on the connecting line of the connecting line of second solution pump and upper strata spray equipment and last solution tank and following solution tank.
Solution module is divided into two-layer up and down, and the upper strata has upper strata spray equipment, upper strata filler from top to bottom, goes up solution tank; Lower floor has lower floor's spray equipment, lower floor's filler, following solution tank from top to bottom, on following solution tank, have first solution pump that links to each other with the upper strata spray equipment and second solution pump that links to each other with the lower floor spray equipment, be provided with dividing plate in the following solution tank, two grooves about will descending solution tank to be divided into, first solution pump is placed on down the right groove of solution tank, the left groove that second solution pump is placed on down solution tank, and dividing plate is provided with port.
Solution module is divided into two-layer up and down, and the upper strata has upper strata spray equipment, upper strata filler from top to bottom, goes up solution tank; Lower floor has lower floor's spray equipment from top to bottom, lower floor's filler, following solution tank, be provided with dividing plate in the following solution tank, two grooves about will descending solution tank to be divided into, on following solution tank, has second solution pump that first solution pump that links to each other with the left groove of upper strata spray equipment and following solution tank links to each other with right groove with lower floor's spray equipment and following solution tank, first solution pump is placed on down the right groove of solution tank, second solution pump is placed on down the left groove of solution tank, is connected with heat exchanger on the connecting line of first solution pump and following solution tank left side groove and the connecting line of second solution pump and the right groove of following solution tank.
Evaporimeter by-passing part air directly enters solution module.Lower floor's filler by-passing part air.Have a plurality of air inlets, air outlet, exhaust outlet on the side plate.Be provided with full heat or sensible heat recycling module before compression module, the solution module.The solution that solution module adopts is the mixed solution of lithium bromide and lithium chloride.
The present invention combines the compression type heat pumping system with the solution dehumidification technology, the regeneration of solution is the heat extraction that utilizes heat pump, can satisfy dry comfortable environment requirement.It has the air port in a plurality of orientation, simple and flexible is installed, applicable to the requirement of various installation sites.
Description of drawings
Fig. 1 is the structural representation of air dehumidifier;
Fig. 2 is the structural representation of compression module of the present invention;
Fig. 3 is the structural representation of solution module I of the present invention;
Fig. 4 is the structural representation of solution module II of the present invention;
Fig. 5 is the structural representation of solution module III of the present invention;
Fig. 6 is the structural representation of solution module IV of the present invention;
Fig. 7 is the structural representation of blower fan module of the present invention;
Fig. 8 is the structural representation of framework of the present invention;
Fig. 9 is the principle schematic of air dehumidifier.
The specific embodiment
As shown in Figure 1, be the structural representation of air dehumidifier, it has compression module 1, solution module 2, blower fan module 3, controller 4 and framework 5 and links to each other.
As shown in Figure 2, be the structural representation of compression module, wherein 6 is that compressor, 7 is that four-way change-over valve, 8 is that condenser, 9 is that device for drying and filtering, 10 is that choke valve, 11 is that evaporimeter, 12 is that tank, 13 is a water leg with fixed attention.Compression module is connected with compressor, four-way change-over valve, condenser, device for drying and filtering, choke valve in turn, and evaporimeter etc., evaporimeter have tank with fixed attention, and condenser has water leg.Evaporimeter can be installed in the upper strata, and summer is when freezing, and the condensed water on the evaporimeter falls into tank with fixed attention, coagulates condensed water in the tank and falls on the condenser by water pipe and evaporate, and can play and reduce condensation temperature, energy-conservation effect; During winter heating, evaporimeter is in lower floor, and the water that defrost forms falls into water leg, discharges machine by drainpipe again.
As shown in Figure 3, be the structural representation of solution module I, the cold soln in the last solution tank 16 is got by first solution pump 19, through upper strata spray equipment 14, sprays on the upper strata filler 15 again, carry out the wet exchange of heat with air after, fall into solution tank; Hot solution in the following solution tank 21 is got by second solution pump 20, and a part of solution sprays on lower floor's filler 18 through lower floor's spray equipment 17 again, carry out the wet exchange of heat with air after, fall into down in the solution tank; Another part solution sprays on the upper strata filler 15 through upper strata spray equipment 14 again, carry out the wet exchange of heat with air after, fall into solution tank.
As shown in Figure 4, structural representation for solution module II, on the basis of Fig. 3, increase heat exchanger, promptly on the connecting line of the connecting line of second solution pump 20 and upper strata spray equipment 14 and last solution tank 16 and following solution tank 21, be connected with heat exchanger 22, its effect is the hot solution elder generation precooling of will stamp, to reduce the loss of cold.
As shown in Figure 5, structural representation for solution module III, cold soln in the following solution tank is got by first solution pump 19, through upper strata spray equipment 14, spray again on the upper strata filler 15, after carrying out the wet exchange of heat with air, flow into down in the solution tank by solution conduit again, mix with cold soln in the following solution tank; Hot solution in the following solution tank 21 is got by second solution pump 20, through lower floor's spray equipment 17, sprays on lower floor's filler 18 again, carry out the wet exchange of heat with air after, fall into down in the solution tank, mix with the hot solution in the following solution tank.Cold and hot solution is isolated by dividing plate 24 in the following solution tank, and exchanges by the port 23 that is arranged on the dividing plate, to keep liquid level equilibrium.
As shown in Figure 6, structural representation for solution module IV, dividing plate 24 is set in the following solution tank 21 isolates cold and hot solution, be connected with heat exchanger (22) on the connecting line of the connecting line of first solution pump (19) and following solution tank left side groove and second solution pump (20) and the right groove of following solution tank, the exchange of cold and hot solution is to carry out heat exchange by heat exchanger 22, and its effect is the loss that reduces cold.
As shown in Figure 7, be the structural representation of blower fan module, blower fan module comprises breeze fan 25, breeze fan support 26, blower fan dividing plate 27, air draft blower fan 28, air draft fan supporter 29.
As shown in Figure 8, be the structural representation of framework, 30 is that top board, 31 is that side plate, 32 is that base plate, 33 is that column, 34 is that air inlet, 35 is that air outlet, 36 is an exhaust outlet.A plurality of air inlets, air outlet and exhaust outlet are arranged on the side plate, can be adapted to the requirement of various installation sites.
As shown in Figure 9, the air inlet on the machine side plate can be imported the mixing wind of new wind, return air or new wind and return air.
In dehumidification mode when operation,, the part of air intake is through the evaporimeter of compression module, be removed sensible heat and latent heat after, pass through the upper strata filler of solution module again, carry out the caloic exchange with cold concentrated solution, further remove latent heat, form air-supply, send into indoor; Another part of air intake is increased sensible heat and latent heat through the condenser of compression module, passes through lower floor's filler of solution module again, carries out the caloic exchange with the weak solution of heat, removes the moisture in the solution, forms air draft, enters in the environment.
In refrigeration mode when operation,, the solution of solution module stops circulation, and the part of air intake is through the evaporimeter of compression module, be removed sensible heat and latent heat after, form air-supply, send into indoor; Another part of air intake is through the condenser of compression module, be increased sensible heat and latent heat after, form air draft, enter in the environment.
In heating mode when operation,, the solution of solution module stops circulation, and the part of air intake is through the condenser of compression module, be increased sensible heat after, form air-supply, send into indoor; Another part of air intake is through the evaporimeter of compression module, be removed sensible heat and latent heat after, form air draft, enter in the environment.
During the air vent mode operation, can carry out the displacement of brand-new wind or the new wind of part.
Claims (10)
1. air dehumidifier, it is characterized in that: it has compression module (1), solution module (2), blower fan module (3), controller (4) and framework (5); Compression module (1) is connected with compressor (6), four-way change-over valve (7), condenser (8), device for drying and filtering (9), choke valve (10), evaporimeter (11) in turn, and evaporimeter has tank (12) with fixed attention, and condenser has water leg (13); Blower fan module (3) has breeze fan (25), blower fan dividing plate (27), air draft blower fan (28) from top to bottom, breeze fan (25) is fixed on the breeze fan support (26), air draft blower fan (28) is fixed on the air draft fan supporter (29), and blower fan dividing plate (27) is fixed on the framework (5); Framework (5) has top board (30), side plate (31), base plate (32), column (33), air inlet (34), air outlet (35), exhaust outlet (36).
2. a kind of air dehumidifier according to claim 1, it is characterized in that: described solution module (2) is divided into two-layer up and down, the upper strata has upper strata spray equipment (14), upper strata filler (15) from top to bottom, goes up solution tank (16), has first solution pump (19) that links to each other with upper strata spray equipment (14) on last solution tank (16); Lower floor has lower floor's spray equipment (17), lower floor's filler (18), following solution tank (21) from top to bottom, has second solution pump (20) that links to each other with lower floor's spray equipment (17) with upper strata spray equipment (14) on the solution tank (21) down.
3. a kind of air dehumidifier according to claim 2 is characterized in that: be connected with heat exchanger (22) on the connecting line of the connecting line of described second solution pump (20) and upper strata spray equipment (14) and last solution tank (16) and following solution tank (21).
4. a kind of air dehumidifier according to claim 1 is characterized in that: described solution module (2) is divided into two-layer up and down, and the upper strata has upper strata spray equipment (14), upper strata filler (15) from top to bottom, goes up solution tank (16); Lower floor has lower floor's spray equipment (17), lower floor's filler (18), following solution tank (21) from top to bottom, have first solution pump (19) that links to each other with upper strata spray equipment (14) and second solution pump (20) that links to each other with lower floor's spray equipment (17) on the solution tank down, be provided with dividing plate (24) in the following solution tank (21), two grooves about will descending solution tank to be divided into, first solution pump (19) is placed on down the right groove of solution tank, the left groove that second solution pump (20) is placed on down solution tank, and dividing plate is provided with port (23).
5. a kind of air dehumidifier according to claim 1 is characterized in that: described solution module (2) is divided into two-layer up and down, and the upper strata has upper strata spray equipment (14), upper strata filler (15) from top to bottom, goes up solution tank (16); Lower floor has lower floor's spray equipment (17) from top to bottom, lower floor's filler (18), following solution tank (21), be provided with dividing plate (24) in the following solution tank, two grooves about will descending solution tank to be divided into, on following solution tank, has second solution pump (20) that first solution pump (19) that links to each other with the left groove of upper strata spray equipment (14) and following solution tank links to each other with right groove with lower floor's spray equipment (17) and following solution tank, first solution pump (19) is placed on down the right groove of solution tank, second solution pump (20) is placed on down the left groove of solution tank, is connected with heat exchanger (22) on the connecting line of first solution pump (19) and following solution tank left side groove and the connecting line of second solution pump (20) and the right groove of following solution tank.
6. a kind of air dehumidifier according to claim 1 is characterized in that: described evaporimeter (11) by-passing part air directly enters solution module.
7. according to claim 2 or 4 or 5 described a kind of air dehumidifiers, it is characterized in that: described lower floor filler (18) by-passing part air.
8. a kind of air dehumidifier according to claim 1 is characterized in that: have a plurality of air inlets (34), air outlet (35), exhaust outlet (36) on the described side plate (31).
9. a kind of air dehumidifier according to claim 1 is characterized in that: described compression module (1), preceding full heat or the sensible heat recycling module of being provided with of solution module (2).
10. a kind of air dehumidifier according to claim 1 is characterized in that: the solution that described solution module (2) adopts is the mixed solution of lithium bromide and lithium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100506023A CN100344912C (en) | 2006-04-29 | 2006-04-29 | Air dehumidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100506023A CN100344912C (en) | 2006-04-29 | 2006-04-29 | Air dehumidifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851333A CN1851333A (en) | 2006-10-25 |
| CN100344912C true CN100344912C (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100506023A Expired - Fee Related CN100344912C (en) | 2006-04-29 | 2006-04-29 | Air dehumidifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN100344912C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009066543A (en) * | 2007-09-14 | 2009-04-02 | Daikin Ind Ltd | Air cleaner |
| CN101457955A (en) * | 2008-11-24 | 2009-06-17 | 袁一军 | Heat energy and water recovery method |
| CN103759337B (en) * | 2014-02-10 | 2016-04-27 | 浙江捷丰科技实业有限公司 | A kind of air-conditioning and control method thereof |
| CN104728956B (en) * | 2015-03-26 | 2018-01-02 | 苏州惠林节能材料有限公司 | High efficiency dehumidifying/humidifying device |
| CN104728957B (en) * | 2015-03-26 | 2018-01-02 | 苏州惠林节能材料有限公司 | A kind of dehumidifying/humidifying device and method |
| CN105041625A (en) * | 2015-07-01 | 2015-11-11 | 冯林 | Bladeless fan with air purification function |
| CN105207086A (en) * | 2015-11-01 | 2015-12-30 | 国网河南鄢陵县供电公司 | Uniform heat dissipation ring main unit adopting compressor for refrigerating air supply |
| EP3665324B1 (en) | 2017-08-09 | 2021-03-10 | Electrolux Professional AB (publ) | Tumble dryer |
| CN109425037B (en) * | 2017-08-18 | 2023-03-31 | 广东美的制冷设备有限公司 | Outdoor integrated air conditioner |
| CN109916170A (en) * | 2019-03-25 | 2019-06-21 | 烟台知兴知识产权咨询服务有限公司 | A kind of air energy heat pump drying dehumidification unit denoising device |
| CN109855145A (en) * | 2019-04-15 | 2019-06-07 | 太原理工大学 | The fume purifier of fume of low-temperature plasma synergistic solution dehumidification |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939906A (en) * | 1989-06-09 | 1990-07-10 | Gas Research Institute | Multi-stage boiler/regenerator for liquid desiccant dehumidifiers |
| JPH08189666A (en) * | 1994-12-28 | 1996-07-23 | Daikin Ind Ltd | Air-conditioner |
| CN1279757A (en) * | 1997-11-16 | 2001-01-10 | 德里克尔有限公司 | Dehumidifier system |
| CN1285032A (en) * | 1997-12-04 | 2001-02-21 | 费德斯公司 | Liquid desiccant dehumidifier and air conditioner |
| CN1743769A (en) * | 2005-10-10 | 2006-03-08 | 尹进福 | Method for air conditioning by solution dehumidifying with cold-hot two-side energy of refrigerating compressor |
-
2006
- 2006-04-29 CN CNB2006100506023A patent/CN100344912C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939906A (en) * | 1989-06-09 | 1990-07-10 | Gas Research Institute | Multi-stage boiler/regenerator for liquid desiccant dehumidifiers |
| JPH08189666A (en) * | 1994-12-28 | 1996-07-23 | Daikin Ind Ltd | Air-conditioner |
| CN1279757A (en) * | 1997-11-16 | 2001-01-10 | 德里克尔有限公司 | Dehumidifier system |
| CN1285032A (en) * | 1997-12-04 | 2001-02-21 | 费德斯公司 | Liquid desiccant dehumidifier and air conditioner |
| CN1743769A (en) * | 2005-10-10 | 2006-03-08 | 尹进福 | Method for air conditioning by solution dehumidifying with cold-hot two-side energy of refrigerating compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1851333A (en) | 2006-10-25 |
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Effective date of registration: 20110712 Address after: 201107, Shanghai, Minhang District Road, No. 58, building 1, on the north side of the district A Co-patentee after: Fujian Chengxin Green Integration Co.,Ltd. Patentee after: Shanghai Chengxin Jianye Energy-Saving Technology Co.,Ltd. Address before: 201107, Shanghai, Minhang District Road, No. 58, building 1, on the north side of the district A Patentee before: Shanghai Chengxin Jianye Energy-Saving Technology Co.,Ltd. |
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Effective date of registration: 20110829 Address after: 201107 Shanghai City, Minhang District Wuzhong Road No. 618 building 22 Wuzhong Patentee after: Shanghai Chengxin Jianye Energy-Saving Technology Co.,Ltd. Address before: 201107, Shanghai, Minhang District Road, No. 58, building 1, on the north side of the district A Co-patentee before: Fujian Chengxin Green Integration Co.,Ltd. Patentee before: Shanghai Chengxin Jianye Energy-Saving Technology Co.,Ltd. |
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Address after: 201107 22 Floor, Wuzhong Building, 618 Wuzhong Road, Minhang District, Shanghai Patentee after: Shanghai Chengxin Facilities Technology Co., Ltd. Address before: 201107 22 Floor, Wuzhong Building, 618 Wuzhong Road, Minhang District, Shanghai Patentee before: Shanghai Chengxin Jianye Energy-Saving Technology Co.,Ltd. |
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Granted publication date: 20071024 Termination date: 20200429 |
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