CN103075874B - Multi-zone transformation plastic dehumidifier and dehumidifying method - Google Patents
Multi-zone transformation plastic dehumidifier and dehumidifying method Download PDFInfo
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- CN103075874B CN103075874B CN201210554502.XA CN201210554502A CN103075874B CN 103075874 B CN103075874 B CN 103075874B CN 201210554502 A CN201210554502 A CN 201210554502A CN 103075874 B CN103075874 B CN 103075874B
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Abstract
The invention relates to the field of dehumidifying equipment and aims at providing a multi-zone transformation plastic dehumidifier and a dehumidifying method. The multi-zone transformation plastic dehumidifier comprises a material dehumidifying barrel, a dehumidifying heater, a dehumidifying fan, a condenser, a drying heater, a drying fan and a multi-zone transformation dehumidifying barrel, wherein the multi-zone transformation dehumidifying barrel comprises a barrel body, two end covers, a fixing device and a driving device; the barrel body comprises an outer barrel, a core shaft and a plurality of drying agent partitioning plates; the two ends of the core shaft are respectively pivoted with the two end covers; an outlet end of the condenser is connected with a first ventilating port and a second ventilating port of one end cover, and a first ventilating port of the other end cover is connected with an inlet end of the dehumidifying fan; a third ventilating port of one end cover is connected with an outlet end of the drying heater; and an outlet end of the drying fan is connected with an inlet end of the drying heater. The multi-zone transformation plastic dehumidifier has the advantages that a drying agent with a low dehumidifying and drying effect does not need to be used for carrying out dehumidifying and drying treatment, and the efficiency for dehumidifying and drying treatment is higher.
Description
Technical field
The present invention relates to dehumidification equipment field, especially a kind of multi-zone transformation plastic dehumidifier and dehumanization method.
Background technology
Many plastic grains raw materials before shaping, all could must be used by removal moisture drying process to a certain extent, to ensure transparency and the fineness of plasthetics.The dehumidifier with desiccant dehumidifying apparatus is conventional dehumidifier; A kind of dehumidifier of the disclosure of the invention of Chinese patent notification number CN1786596A, comprising: desiccant dehumidifying apparatus; Recovery approach, it is configured such that the first area of air through desiccant dehumidifying apparatus, for making moisture evaporation and the condensation of desiccant dehumidifying apparatus.First inlet channel, it is configured such that the second area of air through desiccant dehumidifying apparatus, flows through thus remove the moisture in air for making air.Second inlet channel, it is set to extraneous air directly to be introduced and through the 3rd region of desiccant dehumidifying apparatus, for reclaiming the heat of desiccant dehumidifying apparatus.Due to the drier in desiccant dehumidifying apparatus removal moisture drying effect along with service time extend and absorb moisture content increase, removal moisture drying effect can worse and worse, and the dew point of the dry wind exported after making removal moisture drying process is more and more higher affects effect on moisture extraction; If this dehumidifier is for the removal moisture drying process of plastic grains raw material, plastic grains raw material can be made not stablize and to meet the requirements of removal moisture drying degree, thus affect transparency and the fineness of plasthetics; Can reuse after removal moisture drying process although the drier that removal moisture drying effect declines is exchanged out, time-consuming reduction removal moisture drying treatment effeciency; Just in order to overcome current dehumidifier exist need the drier that removal moisture drying effect declines to exchange out carry out removal moisture drying after can reuse, the deficiency that removal moisture drying treatment effeciency is lower, therefore, designing a kind ofly does not need the drier by removal moisture drying effect declines to exchange out and carry out removal moisture drying process, removal moisture drying treatment effeciency more much higher district conversion plastic moisture removing machine and dehumanization method, become problem demanding prompt solution.
Summary of the invention
The object of the invention is in order to overcome current drier bucket exist need the drier that removal moisture drying effect declines to exchange out carry out removal moisture drying after just can reuse, the deficiency that removal moisture drying treatment effeciency is lower, there is provided a kind of not need the drier that removal moisture drying effect declines to exchange out to carry out removal moisture drying process, removal moisture drying treatment effeciency more much higher district conversion plastic moisture removing machine and dehumanization method.
Concrete technical scheme of the present invention is:
A kind of multi-zone transformation plastic dehumidifier, comprises raw material dehumidification barrel, drying air fan that condenser that dehumidifying blower fan that dehumidification heater that the port of export is connected with the entrance point of raw material dehumidification barrel, the port of export are connected with the entrance point of dehumidification heater, entrance point are connected with the port of export of raw material dehumidification barrel, drying heater, the port of export are connected with the entrance point of drying heater and multi-region changes dehumidification barrel; Described multi-region conversion dehumidification barrel comprise staving and two be equipped with the first blow vent, the second blow vent and the 3rd blow vent end cap, for the fixture that is connected and fixed between two end caps and the drive unit for driving staving to rotate; Described staving comprise mandrel, outer barrel, circumferentially and two side ends be fixedly connected with mandrel with gusset in outer barrel respectively several drier dividing plates, two two ends laying respectively at drier dividing plate slipping ring and two filter screens be respectively fixedly connected with an interior slipping ring in being fixedly connected with gusset in outer barrel; The two ends of mandrel respectively with two end cap pivot joints; The port of export of condenser is connected with the first blow vent of an end cap and the second blow vent, and the first blow vent of another end cap is connected with the entrance point of dehumidifying blower fan; 3rd blow vent of an end cap is connected with the port of export of drying heater, and the port of export of drying air fan is connected with the entrance point of drying heater.When this multi-zone transformation plastic dehumidifier uses, drive unit drives staving slow rotation to make the drier be placed between the drier dividing plate in outer barrel alternately be in absorption moisture content and the withering state of dried wind, reaches the plastic grains raw material continuous dehumidifying to raw material dehumidification barrel.This multi-zone transformation plastic dehumidifier does not need the drier that removal moisture drying effect declines to exchange out to carry out removal moisture drying process, and removal moisture drying treatment effeciency is higher.
Described end cap comprises the end shield being provided with core retainer plate and mates and the outer slipping ring be fixedly connected with the openend of end shield with the internal diameter of outer barrel with external diameter; Two outer slipping rings respectively stretch into one end of outer barrel, each end thereof contacts with an interior slipping ring in one end of two outer slipping rings; The two ends of mandrel are each with a core retainer plate pivot joint; Be provided with inside end shield and will be divided into three ventilation dividing plates of circumferential first air flue, the second air flue and the 3rd air flue inside end shield; First blow vent is communicated with the first air flue, and the second blow vent is communicated with the second air flue, and the 3rd blow vent is communicated with the 3rd air flue.The shunting that three ventilation dividing plates are conducive to wet gas current and dry gas stream is provided with inside end shield.
As preferably, the outside of a described end shield is arranged with fixed head; The outside of another end shield is arranged with installing plate; Fixture comprises several screw rods, the number stage clip equal with the number of screw rod and nut; One end of screw rod is connected with nut thread with stage clip through fixed head, and the other end of screw rod is connected with nut thread through installing plate.Fixture structure is simple and practical; There is stage clip take into account and to relatively rotate between outer slipping ring and interior slipping ring flexibly and stable connection between two end shields.
As preferably, between the outer gusset of described outer slipping ring and the interior gusset of outer barrel, be provided with sealing ring.Air-flow is made not reveal the raising thermal efficiency.
As preferably, described drive unit comprise be fixedly connected with installing plate reducing motor, with the synchronizing wheel that the output of reducing motor is fixedly connected with, the synchronous gear ring be fixedly connected with the outer gusset of outer barrel, Timing Belt and the regulating wheel that is connected for tensioning Timing Belt and with installing plate; Synchronizing wheel is in transmission connection with synchronous gear ring by Timing Belt.Driving device structure is simple and practical.
As preferably, described drier dividing plate has 16 and is uniformly distributed along the circumference.The fluctuation of the dew point of dry wind can be reduced.
As preferably, the angles between two ventilation dividing plates of the first described air flue both sides are 225 degree; Angle between two ventilation dividing plates of the second air flue both sides is 45 degree; Angle between two ventilation dividing plates of the 3rd air flue both sides is 90 degree.Make the drier between outer barrel internal desiccant dividing plate be alternately in absorption moisture content and the withering time scale of dried wind be in best match state.
The dehumanization method of described multi-zone transformation plastic dehumidifier, comprising: place drier between (1) two often adjacent drier dividing plates in outer barrel, needs the plastic grains raw material of dehumidifying to be placed in raw material dehumidification barrel; (2) under dehumidifying fan action, dry gas stream after the dehumidifying of multi-region conversion dehumidification barrel enters raw material dehumidification barrel from the first blow vent outflow of another end shield and dehumidifies to plastic grains raw material after dehumidification heater heating, the wet gas current with moisture content flowed out from raw material dehumidification barrel condenses into dew after condenser cooling, wet gas current enters multi-region conversion dehumidification barrel from the first blow vent of an end shield, the inside drier wet gas current moisture content is adsorbed after become dry gas stream, from another end shield first blow vent flow out circulating dehumidification; (3) air of drying heater dry heat forms dry wind under the effect of drying air fan, enters multi-region conversion dehumidification barrel carry out drying process to drier from the 3rd blow vent of an end shield; Steam is discharged from the second blow vent of another end shield and the 3rd blow vent; (4) drive unit drives staving slow rotation to make the drier be placed between the drier dividing plate in outer barrel alternately be in absorption moisture content and the withering state of dried wind, reaches the plastic grains raw material continuous dehumidifying to raw material dehumidification barrel.The dehumanization method of multi-zone transformation plastic dehumidifier is simple and practical.
Compared with prior art, the invention has the beneficial effects as follows: one. this multi-zone transformation plastic dehumidifier does not need the drier that removal moisture drying effect declines to exchange out to carry out removal moisture drying process, and removal moisture drying treatment effeciency is higher.Two. be provided with the shunting that three ventilation dividing plates are conducive to wet gas current and dry gas stream inside end shield.Three. fixture and driving device structure simple and practical; Fixture has stage clip and takes into account and to relatively rotate between outer slipping ring and interior slipping ring flexibly and stable connection between two end shields.Four. be provided with sealing ring between the outer gusset of outer slipping ring and outer barrel, make air-flow not reveal the raising thermal efficiency.Five. drier dividing plate has 16 and is uniformly distributed along the circumference, and can reduce the fluctuation of the dew point of dry wind.Six. the angle between two ventilation dividing plates of the first air flue both sides is 225 degree; Angle between two ventilation dividing plates of the second air flue both sides is 45 degree; Angles between two of 3rd air flue both sides ventilation dividing plates are 90 degree, make the drier between outer barrel internal desiccant dividing plate alternately be in absorption moisture content and the withering time scale of dried wind is in best match state.Seven. the dehumanization method of multi-zone transformation plastic dehumidifier is simple and practical.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the left view of multi-region conversion dehumidification barrel in Fig. 1;
Fig. 3 is the top view of multi-region conversion dehumidification barrel in Fig. 1;
Fig. 4 is the A-A sectional view of Fig. 2;
Fig. 5 is the B-B sectional view of Fig. 2;
Fig. 6 is the C place enlarged drawing of Fig. 2.
In figure: fixed head-1, installing plate-2, multi-region conversion dehumidification barrel-3, staving 31, mandrel 311, outer barrel 312, drier dividing plate 313, interior slipping ring 314, filter screen 315, end cap 32, first blow vent 321, second blow vent 322, 3rd blow vent 323, core retainer plate 324, end shield 325, outer slipping ring 326, first air flue 327, second air flue 328, 3rd air flue 329, ventilation dividing plate 3210, screw rod-4, stage clip-5, nut-6, reducing motor-7, synchronizing wheel-8, synchronous gear ring-9, Timing Belt-10, regulating wheel-11, sealing ring-12, raw material dehumidification barrel-13, dehumidification heater-14, dehumidifying blower fan-15, condenser-16, drying heater-17, drying air fan-18.
Detailed description of the invention
Below in conjunction with shown in accompanying drawing, the present invention is described further.
As shown in accompanying drawing 1 to accompanying drawing 6: a kind of multi-zone transformation plastic dehumidifier, comprise raw material dehumidification barrel 13, drying air fan 18 that condenser 16 that dehumidifying blower fan 15 that dehumidification heater 14 that the port of export is connected with the entrance point of raw material dehumidification barrel 13, the port of export are connected with the entrance point of dehumidification heater 14, entrance point are connected with the port of export of raw material dehumidification barrel 13, drying heater 17, the port of export are connected with the entrance point of drying heater 17 and multi-region change dehumidification barrel 3; Described multi-region conversion dehumidification barrel 3 comprise staving 31 and two all have the first blow vent 321, second blow vent 322 and the 3rd blow vent 323 end cap 32, for the fixture that is connected and fixed between two end caps 32 and the drive unit for driving staving 31 to rotate; Described staving 31 comprise mandrel 311, outer barrel 312, circumferentially and 313, two, several drier dividing plates that two side ends is welded with gusset in outer barrel 312 and mandrel 311 respectively lay respectively at drier dividing plate 313 two ends and in connecing with the inner side weld all around of outer barrel 312 slipping ring 314 and two respectively cover one end of several drier dividing plates 313 and the filter screen 315 be respectively connected with interior slipping ring 314 screw; The two ends of mandrel 311 respectively with the pivot joint of two end caps 32; The port of export of condenser 16 is connected with the first blow vent 321 of an end cap 32 and the second blow vent 322, and the first blow vent 321 of another end cap 32 is connected with the entrance point of dehumidifying blower fan 15; 3rd blow vent 323 of an end cap 32 is connected with the port of export of drying heater 17, and the port of export of drying air fan 18 is connected with the entrance point of drying heater 17.
In the present embodiment, described drier dividing plate 313 has 16 and is uniformly distributed along the circumference.Described end cap 32 comprises the internal diameter matched in clearance of the end shield 325 with core retainer plate 324 and external diameter and outer barrel 312 and the outer slipping ring 326 welded with the openend of end shield 325; Two outer slipping rings 326 respectively stretch into one end of outer barrel 312, each end thereof contacts with an interior slipping ring 314 in one end of two outer slipping rings 326; The material of core retainer plate 324 is Allen's metal; The two ends of mandrel 311 are each with the pivot joint of a core retainer plate 324; Have inside end shield 325 and will be divided into three ventilation dividing plates 3210 of circumferential first air flue 327, second air flue 328 and the 3rd air flue 329 inside end shield 325; First blow vent 321 is communicated with the first air flue 327, and the second blow vent 322 is communicated with the second air flue 328, and the 3rd blow vent 323 is communicated with the 3rd air flue 329.
The outer gusset of a described end shield 325 has fixed head 1; The outer gusset of another end shield 325 has installing plate 2; Fixture comprises three screw rods 4, number three stage clips 5 equal with the number of screw rod 4 and six nuts 6; One end of screw rod 4 is threaded with nut 6 through fixed head 1 and stage clip 5, and the other end of screw rod 4 is threaded with nut 6 through installing plate 2.
Between the outer gusset of described outer slipping ring 326 and the interior gusset of outer barrel 312, there is sealing ring 12.
The regulating wheel 11 that described drive unit comprises the reducing motor 7 connected with installing plate 2 screw, the synchronizing wheel 8 be connected with the output key of reducing motor 7, the synchronous gear ring 9 be connected with the outer gusset screw of outer barrel 312, Timing Belt 10 and is connected for tensioning Timing Belt 10 and with installing plate; Described reducing motor 7 is toothed gearing electric motor; Synchronizing wheel 8 is in transmission connection with synchronous gear ring 9 by Timing Belt 10.
Angle between two ventilation dividing plates 3210 of the first described air flue 327 both sides is 225 degree; Angle between two ventilation dividing plates 3210 of the second air flue 328 both sides is 45 degree; Angle between two ventilation dividing plates 3210 of the 3rd air flue 329 both sides is 90 degree.
The dehumanization method of described multi-zone transformation plastic dehumidifier, comprising: be all equipped with drier between (1) two often adjacent drier dividing plates 313 in outer barrel 312, needs the plastic grains raw material of dehumidifying to be placed in raw material dehumidification barrel 13, (2) under dehumidifying blower fan 15 acts on, dry gas stream after multi-region conversion dehumidification barrel 3 dehumidifies flows out from the first blow vent 321 of another end shield 325 and enter the 13 pairs of plastic grains raw material dehumidifying of raw material dehumidification barrel after dehumidification heater 14 heats, the wet gas current with moisture content flowed out from raw material dehumidification barrel 13 condenses into dew after condenser 16 cools, wet gas current enters multi-region conversion dehumidification barrel 3 from the first blow vent 321 of an end shield 325, the inside drier wet gas current moisture content is adsorbed after become dry gas stream, circulating dehumidification is flowed out from the first blow vent 321 of another end shield 325, (3) air of drying heater 17 dry heat forms dry wind under the effect of drying air fan 18, enters multi-region conversion dehumidification barrel 3 pairs of drier carry out drying process from the 3rd blow vent 323 of an end shield 325, steam is discharged from the second blow vent 322 of another end shield 325 and the 3rd blow vent 323, (4) drive unit drives staving 312 slow rotation to make the drier be placed between the drier dividing plate 313 in outer barrel 312 alternately be in absorption moisture content and the withering state of dried wind, reaches the plastic grains raw material continuous dehumidifying to raw material dehumidification barrel 13.
The invention has the beneficial effects as follows: this multi-zone transformation plastic dehumidifier does not need the drier that removal moisture drying effect declines to exchange out to carry out removal moisture drying process, and removal moisture drying treatment effeciency is higher.The shunting that three ventilation dividing plates are conducive to wet gas current and dry gas stream is provided with inside end shield.Fixture and driving device structure simple and practical; Fixture has stage clip and takes into account and to relatively rotate between outer slipping ring and interior slipping ring flexibly and stable connection between two end shields.Be provided with sealing ring between the outer gusset of outer slipping ring and outer barrel, make air-flow not reveal the raising thermal efficiency.Drier dividing plate has 16 and is uniformly distributed along the circumference, and can reduce the fluctuation of the dew point of dry wind.Angle between two ventilation dividing plates of the first air flue both sides is 225 degree; Angle between two ventilation dividing plates of the second air flue both sides is 45 degree; Angles between two of 3rd air flue both sides ventilation dividing plates are 90 degree, make the drier between outer barrel internal desiccant dividing plate alternately be in absorption moisture content and the withering time scale of dried wind is in best match state.The dehumanization method of multi-zone transformation plastic dehumidifier is simple and practical.
It is apparent to one skilled in the art that the present invention can change into various ways, and such change is not thought and departed from the scope of the present invention.All like this to the apparent amendment of the technical staff in described field, by be included in this claim scope within.
Claims (6)
1. a multi-zone transformation plastic dehumidifier, it is characterized in that, comprise raw material dehumidification barrel, drying air fan that condenser that dehumidifying blower fan that dehumidification heater that the port of export is connected with the entrance point of raw material dehumidification barrel, the port of export are connected with the entrance point of dehumidification heater, entrance point are connected with the port of export of raw material dehumidification barrel, drying heater, the port of export are connected with the entrance point of drying heater and multi-region change dehumidification barrel; Described multi-region conversion dehumidification barrel comprise staving and two be equipped with the first blow vent, the second blow vent and the 3rd blow vent end cap, for the fixture that is connected and fixed between two end caps and the drive unit for driving staving to rotate; Described staving comprise mandrel, outer barrel, circumferentially and two side ends weld with gusset in outer barrel and mandrel respectively several drier dividing plates, two two ends laying respectively at drier dividing plate slipping ring and two filter screens be respectively connected with an interior slipping ring screw in connecing with the inner side weld all around of outer barrel; The two ends of mandrel respectively with two end cap pivot joints; The port of export of condenser is connected with the first blow vent of an end cap and the second blow vent, and the first blow vent of another end cap is connected with the entrance point of dehumidifying blower fan; 3rd blow vent of an end cap is connected with the port of export of drying heater, and the port of export of drying air fan is connected with the entrance point of drying heater; Described end cap comprises the end shield being provided with core retainer plate and mates and the outer slipping ring be fixedly connected with the openend of end shield with the internal diameter of outer barrel with external diameter; Two outer slipping rings respectively stretch into one end of outer barrel, each end thereof contacts with an interior slipping ring in one end of two outer slipping rings; The two ends of mandrel are each with a core retainer plate pivot joint; Be provided with inside end shield and will be divided into three ventilation dividing plates of circumferential first air flue, the second air flue and the 3rd air flue inside end shield; First blow vent is communicated with the first air flue, and the second blow vent is communicated with the second air flue, and the 3rd blow vent is communicated with the 3rd air flue; The outside of a described end shield is arranged with fixed head; The outside of another end shield is arranged with installing plate; Fixture comprises several screw rods, the number stage clip equal with the number of screw rod and nut; One end of screw rod is connected with nut thread with stage clip through fixed head, and the other end of screw rod is connected with nut thread through installing plate.
2. multi-zone transformation plastic dehumidifier according to claim 1, is characterized in that: be provided with sealing ring between the outer gusset of described outer slipping ring and the interior gusset of outer barrel.
3. multi-zone transformation plastic dehumidifier according to claim 1 and 2, is characterized in that: described drive unit comprise be fixedly connected with installing plate reducing motor, with the synchronizing wheel that the output of reducing motor is fixedly connected with, the synchronous gear ring be fixedly connected with the outer gusset of outer barrel, Timing Belt and the regulating wheel that is connected for tensioning Timing Belt and with installing plate; Synchronizing wheel is in transmission connection with synchronous gear ring by Timing Belt.
4. the multi-zone transformation plastic dehumidifier according to claim 1 or 2 or 3, is characterized in that: described drier dividing plate has 16 and is uniformly distributed along the circumference.
5. multi-zone transformation plastic dehumidifier according to claim 4, is characterized in that: the angle between two ventilation dividing plates of the first described air flue both sides is 225 degree; Angle between two ventilation dividing plates of the second air flue both sides is 45 degree; Angle between two ventilation dividing plates of the 3rd air flue both sides is 90 degree.
6. the dehumanization method of multi-zone transformation plastic dehumidifier according to claim 1, is characterized in that: comprise between (1) two often adjacent drier dividing plates in outer barrel and place drier, needs the plastic grains raw material of dehumidifying to be placed in raw material dehumidification barrel; (2) under dehumidifying fan action, dry gas stream after the dehumidifying of multi-region conversion dehumidification barrel enters raw material dehumidification barrel from the first blow vent outflow of another end shield and dehumidifies to plastic grains raw material after dehumidification heater heating, the wet gas current with moisture content flowed out from raw material dehumidification barrel condenses into dew after condenser cooling, wet gas current enters multi-region conversion dehumidification barrel from the first blow vent of an end shield, the inside drier wet gas current moisture content is adsorbed after become dry gas stream, from another end shield first blow vent flow out circulating dehumidification; (3) air of drying heater dry heat forms dry wind under the effect of drying air fan, enters multi-region conversion dehumidification barrel carry out drying process to drier from the 3rd blow vent of an end shield; Steam is discharged from the second blow vent of another end shield and the 3rd blow vent; (4) drive unit drives staving slow rotation to make the drier be placed between the drier dividing plate in outer barrel alternately be in absorption moisture content and the withering state of dried wind, reaches the plastic grains raw material continuous dehumidifying to raw material dehumidification barrel.
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| CN103776252A (en) * | 2013-12-04 | 2014-05-07 | 浙江博强机械制造有限公司 | Filament yarn dehumidifying and vacuum drying device |
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| CN203046036U (en) * | 2012-12-19 | 2013-07-10 | 宁波斯曼尔电器有限公司 | Multi-region transition plastic dehumidifier |
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| US5301439A (en) * | 1992-11-10 | 1994-04-12 | Wang Bang Chih | Desiccant rotor of a dehumidifier |
| DE19516311A1 (en) * | 1995-05-04 | 1996-11-07 | Graeff Roderich Wilhelm | Method and device for preparing an adsorbent containing an agent, in particular moisture |
| CN2332977Y (en) * | 1998-06-02 | 1999-08-11 | 陈涞发 | One-drum runner dehumidifying drier |
| JP3819272B2 (en) * | 2001-10-01 | 2006-09-06 | 株式会社エヌ・ティ・ティ ファシリティーズ | Dehumidifying rotor and dehumidifying device using the same |
| CN100501298C (en) * | 2006-07-04 | 2009-06-17 | 财团法人工业技术研究院 | Rotating wheel type dehumidifying machine dehumidifying wheel replacing device |
| CN101772685B (en) * | 2007-08-03 | 2012-10-03 | 株式会社松井制作所 | Method of dehumidifying and drying powdered or granular material and system for dehumidifying and drying powdered or granular material |
| CN201311165Y (en) * | 2008-12-05 | 2009-09-16 | 东莞信易电热机械有限公司 | Horizontal mounting structure for honeycomb of dehumidifier |
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| CN203046036U (en) * | 2012-12-19 | 2013-07-10 | 宁波斯曼尔电器有限公司 | Multi-region transition plastic dehumidifier |
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