CN110895096B - Device for accurately and uniformly regulating air flow and efficient tobacco leaf dehumidifying and drying device - Google Patents
Device for accurately and uniformly regulating air flow and efficient tobacco leaf dehumidifying and drying device Download PDFInfo
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- CN110895096B CN110895096B CN201911297012.4A CN201911297012A CN110895096B CN 110895096 B CN110895096 B CN 110895096B CN 201911297012 A CN201911297012 A CN 201911297012A CN 110895096 B CN110895096 B CN 110895096B
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- orifice plate
- tobacco leaf
- air flow
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- 238000001035 drying Methods 0.000 title claims abstract description 62
- 241000208125 Nicotiana Species 0.000 title claims abstract description 37
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 29
- 238000009423 ventilation Methods 0.000 claims abstract description 154
- 239000011148 porous material Substances 0.000 claims abstract description 71
- 238000009826 distribution Methods 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003570 air Substances 0.000 claims description 218
- 238000007599 discharging Methods 0.000 claims description 33
- 239000012080 ambient air Substances 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 abstract description 6
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 238000007791 dehumidification Methods 0.000 description 12
- 239000007787 solid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/004—Heating arrangements using waste heat recovered from dryer exhaust gases by compressing and condensing vapour in exhaust gases, i.e. using an open cycle heat pump system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/22—Tobacco leaves
-
- 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
Abstract
An air flow accurate and uniform adjusting device and a tobacco leaf efficient dehumidifying and drying device. The invention discloses an accurate and uniform air flow regulating device and a high-efficiency dehumidifying and drying device, which comprise: a first orifice plate having a plurality of ventilation areas disposed therein; the second pore plate is provided with air distribution openings at positions corresponding to the ventilation areas of the first pore plate, and the air distribution openings are identical to the corresponding ventilation areas in outline; the second pore plate and the first pore plate are overlapped, and each air distribution port corresponds to each ventilation area one by one; the second orifice plate and the first orifice plate can move relatively, and the overlapping part of each ventilation area and the air distribution opening changes in the relative movement process to realize the adjustment of air flow. According to the air flow precise and uniform regulating device provided by the invention, the plurality of ventilation areas are uniformly distributed on the first pore plate, the plurality of air distribution openings are correspondingly arranged on the second pore plate, and the ventilation area of each ventilation area of the first pore plate is regulated through the mutual movement of the two pore plates, so that the total flow regulation of the plurality of ventilation areas of the first pore plate and the uniform distribution of air flow on the ventilation section are realized, and the precise and uniform regulation of the air flow is realized.
Description
Technical Field
The invention relates to the technical field of heat pump system design, in particular to an air flow precise and uniform regulating device and a tobacco leaf efficient dehumidification drying device.
Background
Air is the most important material condition for human life to continue, and is also the physical platform for industrial operations such as refrigeration, dehumidification, heating, humidification, heat preservation, drying, air separation, and the like. In some production links and living places, air is required to be used and the gas flow is accurately regulated and controlled.
Since the fluidity of the gas is excellent and the density, viscosity coefficient, reynolds number, etc. of the thermal properties of the marking gas vary with the variation of the temperature, pressure, etc. of the gas, in general, the method and means for measuring and adjusting the flow rate of the gas are more complicated and the measurement and adjustment accuracy is lower than those of solid particles and liquid substances.
Solves the problem of accurate regulation of the gas flow required by the production link and the living place, and becomes an important difficult problem in the field of fluid mechanics.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides an accurate and uniform air flow regulating device, which comprises:
a first orifice plate having a plurality of ventilation areas disposed thereon;
the second pore plate is provided with air distribution openings at positions corresponding to the ventilation areas on the first pore plate, and the air distribution openings can cover the ventilation areas;
the second pore plate and the first pore plate are overlapped, and the air distribution openings are in one-to-one correspondence with the ventilation areas; the second pore plate and the first pore plate can relatively move, and the overlapping part of each ventilation area and the air distribution opening is changed in the process of relatively moving, so that the air flow is regulated.
Preferably, a plurality of ventilation areas are uniformly distributed along the transverse or longitudinal interval of the first pore plate, and a plurality of air distribution openings are uniformly distributed along the transverse or longitudinal interval of the second pore plate; and the ventilation area and the air distribution opening have the same shape, size and contour.
Preferably, the ventilation area and the air distribution opening are rectangular.
Preferably, a moving direction between the first orifice plate and the second orifice plate is along an arrangement direction of the ventilation areas.
Preferably, the distance between the adjacent ventilation areas is equal to the distance between the adjacent air distribution openings;
the distance between the adjacent air distribution openings is larger than or equal to the dimension of the ventilation area in the moving direction between the first pore plate and the second pore plate.
Preferably, at least one vent is disposed on the venting area.
Preferably, at least one row of ventilation holes are uniformly distributed on the ventilation area, and a plurality of ventilation holes are uniformly distributed on each row.
Preferably, the device also comprises a driving device;
the first orifice plate is a fixed orifice plate, the second orifice plate is a movable orifice plate, the fixed orifice plate is fixed on the section of an air duct of which the air flow needs to be regulated, the movable orifice plate is movably arranged on the fixed orifice plate, and the driving device drives the movable orifice plate to move relative to the fixed orifice plate.
The invention also provides a high-efficiency dehumidification drying device, which comprises an air flow channel with an air inlet and an air outlet, wherein at least one group of heat pump units are arranged in the air flow channel, and each heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation system; the air inlet is provided with the device for accurately and uniformly regulating the air flow;
the wet air enters the air flow channel from the air inlet, is cooled and dehumidified through the evaporator sequentially, is heated by the condenser to become dry air, and is discharged through the air outlet.
The invention also provides a tobacco leaf efficient dehumidification drying device, which comprises a heat pump unit with an air inlet and an air outlet which are connected with each other and used as a heat source, and a drying airflow circulation channel of a drying space for evaporating moisture of tobacco leaves, wherein at least one group of heat pump unit condensers are arranged in the airflow circulation channel, and each heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation system; the evaporators are all positioned in the ambient air outside the airflow circulation channel, and the condensers are all positioned in the circulation channel;
the invention provides a tobacco leaf efficient dehumidification drying device, wherein a fresh air port and a moisture discharging port are arranged on an airflow circulation channel, and the fresh air port and the moisture discharging port are provided with the device for accurately and uniformly regulating the air flow;
preferably, the size of the ventilation hole on the first pore plate on the moisture removal port is smaller than that of the ventilation hole on the first pore plate on the fresh air port.
Preferably, the tobacco leaf drying device also comprises a tobacco leaf drying space, and an air inlet and an air outlet of the air flow circulation channel are communicated with the drying space to form an air flow closed circulation drying channel.
Preferably, the evaporator is disposed opposite to the moisture discharge port.
Preferably, the second orifice plate on the moisture discharging port and the second orifice plate on the fresh air port share a driving device, and are synchronously opened and synchronously closed.
Preferably, the moisture-discharging flow beam groups emitted by the plurality of vent hole clusters on the first orifice plate of the moisture-discharging port uniformly irradiate to the windward side of the evaporator of the heat pump unit.
Preferably, a first fan is arranged in the airflow circulation air duct close to the air outlet.
Preferably, a second fan is arranged on one side of the evaporator.
Preferably, a third fan is arranged in the airflow circulation air duct and close to the moisture discharge port.
Compared with the prior art, the air flow accurate and uniform regulating device and the efficient dehumidifying and drying device provided by the invention have the following advantages and positive effects:
1. uniform air distribution
Because a large number of ventilation holes are uniformly densely distributed on a plurality of cluster ventilation areas on the first pore plate, no matter how many rows of ventilation holes in the plurality of ventilation areas are covered by a solid plate area between air distribution openings of the second pore plate, a plurality of rows of ventilation holes in the plurality of cluster ventilation areas which are not covered and leaked out are uniformly distributed on the whole ventilation section from the view of the whole first pore plate area, so that the uniformity of air flow on the air duct section is ensured;
2. accurate air distribution
A plurality of clustered ventilation areas are uniformly and densely distributed on the first pore plate, and a certain number of ventilation holes capable of being penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device just like a sieve hole;
the number of the ventilation holes which are accurately reserved is covered by the solid plate area between the air distribution openings of the second pore plate to the ventilation holes of the plurality of cluster ventilation areas on the first pore plate, so that the air flow can be accurately controlled;
3. small sliding distance and simple driving mechanism
Because the second orifice plate with a plurality of large rectangular square holes is adopted to match with the first orifice plate with a plurality of clustered ventilation areas, the ventilation surface where the whole first orifice plate is positioned is decomposed into a plurality of repeated 'stepping' areas; thus, each repeated stepping area (i.e. clustered ventilation area) is very narrow as seen in the sliding direction of the dedicated second orifice plate, thereby bringing about the technical effects of small sliding distance and simple driving mechanism.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram showing the device for precisely and uniformly adjusting the air flow in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the large flow rate of the device for precisely and uniformly adjusting the air flow rate in the embodiment 1 of the present invention;
FIG. 3 is a schematic illustration of the medium flow rate of the device for precise and uniform adjustment of the medium flow rate in embodiment 1 of the present invention;
FIG. 4 is a schematic view of the small flow rate of the device for precisely and uniformly adjusting the air flow rate in the embodiment 1 of the present invention;
FIG. 5 is a zero flow schematic diagram of a device for precise and uniform adjustment of air flow in embodiment 1 of the present invention;
FIG. 6 shows a variation of the device for precise and uniform adjustment of air flow in embodiment 1 of the present invention;
fig. 7 is a schematic structural diagram of an efficient dehumidifying and drying apparatus in embodiment 3 of the present invention;
FIG. 8 is a schematic view showing the structure of a fixed orifice plate in embodiment 3 of the present invention;
fig. 9 is a schematic diagram of the structure of a moving orifice plate in embodiment 3 of the present invention.
Fig. 10 is a schematic structural diagram of a device for precisely and uniformly adjusting air flow rate at a wet discharging port and a fresh air port in embodiment 3 of the present invention.
Detailed Description
The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
Examples
Referring to fig. 1 to 5, the invention provides an accurate and uniform air flow regulating device, which comprises a first orifice plate 1 and a second orifice plate 2, wherein a plurality of ventilation areas 101 are arranged on the first orifice plate 1; the second pore plate 2 is provided with air distribution openings 201 at positions corresponding to the ventilation areas 101, and the air distribution openings 201 can cover the ventilation areas; the second orifice plate 2 is overlapped with the first orifice plate 1, and each air distribution port 201 corresponds to each ventilation area 101 one by one; the second orifice plate 2 and the first orifice plate 1 can relatively move, and the overlapping part of each ventilation area 101 and the air distribution port 201 is changed in the process of relatively moving, so that the adjustment of air flow is realized.
According to the accurate and uniform air flow regulating device provided by the invention, the plurality of ventilation areas are uniformly distributed on the first pore plate, the plurality of air distribution openings are correspondingly arranged on the second pore plate, and the ventilation areas of the first pore plate are regulated through the mutual movement of the two pore plates, so that the flow of the ventilation areas of the first pore plate is regulated, the total flow regulation of the ventilation areas of the first pore plate and the uniform distribution of air flow on the ventilation section are realized, and the accurate and uniform regulation of air flow is realized.
In this embodiment, a plurality of ventilation areas 101 are uniformly distributed along the longitudinal interval of the first orifice plate 1, and a plurality of air distribution openings 201 are uniformly distributed along the longitudinal interval of the second orifice plate 2; of course, in other embodiments, the plurality of ventilation areas 101 may be uniformly distributed along the lateral direction of the first orifice plate 1, and the plurality of air distribution openings 201 may be uniformly distributed along the lateral direction of the second orifice plate 2, as shown in fig. 6, which is not limited herein.
The ventilation area 101 and the air distribution port 201 in this embodiment have the same shape and size; of course, in other embodiments, the size of the air distribution opening 201 may be larger or smaller than the size of the ventilation area 101, and may be selected according to the specific situation, which is not limited herein.
In this embodiment, the ventilation area and the air distribution opening are both rectangular. The ventilation area 101 and the air distribution opening 201 are arranged in a rectangular shape in this embodiment to facilitate uniform adjustment of the ventilation area. Of course, in other embodiments, the ventilation area 101 and the air distribution opening 201 may have other polygonal or irregular shapes, which is not limited herein.
Further, in this embodiment, the moving direction between the second orifice plate and the first orifice plate is along the arrangement direction of the ventilation area.
Further, the interval between the adjacent ventilation areas 101 is equal to the interval between the adjacent air distribution openings 201; the distance between adjacent air distribution openings 201 is equal to or greater than the dimension of the ventilation area 101 in the direction of movement between the first orifice plate and the second orifice plate. This is advantageous in ensuring that the second orifice plate completely closes the ventilation zone 101 on the first orifice plate 1 to achieve zero flow.
In this embodiment, at least one ventilation hole 102 is disposed on the ventilation area 101, and preferably at least one row of ventilation holes 102 is uniformly distributed on the ventilation area 101, and a plurality of ventilation holes are uniformly distributed on each row, as shown in fig. 1, so that the design is favorable for accurate and uniform adjustment of the air quantity. The further vent holes 102 are preferably circular holes. Of course, in other embodiments, the number and shape of the ventilation holes 102 in the ventilation area 101 may be adjusted according to the specific situation, which is not limited herein.
In the embodiment, the first orifice plate 1 is a fixed orifice plate, the second orifice plate 2 is a movable orifice plate, the fixed orifice plate is fixed on the section of the air duct of which the air flow is required to be regulated, and the movable orifice plate is movably arranged on the fixed orifice plate; the device also comprises a driving device which drives the movable orifice plate to move relative to the fixed orifice plate.
Of course, in other embodiments, the first orifice plate may be a moving orifice plate, the second orifice plate may be a fixed orifice plate, and the driving device drives the first orifice plate to move relative to the second orifice plate, which is not limited herein and may be adjusted according to specific situations.
The operation of the device for precise and uniform regulation of air flow is further described below with reference to fig. 2-5:
1. as shown in fig. 2, each ventilation area 101 on the first orifice plate 1 is opposite to each air distribution opening on the second orifice plate 2, and the ventilation holes 102 on the ventilation area 101 are all leaked and not shielded and are in a ventilation state, and the air flow reaches the maximum;
2. as shown in fig. 3, the second orifice plate 2 moves down a small distance relative to the first orifice plate 1, the second orifice plate 2 covers the uppermost row of ventilation holes 102 of each ventilation area 101, and the ventilation holes 102 of the lower rows all leak out, at which time the air flow rate decreases to "next largest";
3. by analogy, as shown in fig. 4, the greater the distance the second orifice plate 2 moves downward relative to the first orifice plate 1, the greater the number of ventilation holes 102 on the covered ventilation area 101, the fewer ventilation holes that can be ventilated, and the gradually decreasing the air flow rate.
4. As illustrated in fig. 5, when the second orifice plate moves relative to the first orifice plate to completely cover the ventilation zone 101, the air flow rate decreases to "zero".
The invention has the advantages that the air flow is accurately and uniformly regulated by matching the two pore plates:
1. uniform air distribution
Because a large number of ventilation holes are uniformly densely distributed on a plurality of cluster ventilation areas on the first pore plate, no matter how many rows of ventilation holes in the plurality of ventilation areas are covered by a solid plate area between air distribution openings of the second pore plate, a plurality of rows of ventilation holes in the plurality of cluster ventilation areas which are not covered and leaked out are uniformly distributed on the whole ventilation section from the whole first pore plate area, so that the uniformity of air flow is ensured;
2. accurate air distribution
A plurality of clustered ventilation areas are uniformly and densely distributed on the first pore plate, and a certain number of ventilation holes capable of being penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device just like a sieve hole;
the number of the ventilation holes which are accurately reserved is covered by the solid plate area between the air distribution openings of the second pore plate to the ventilation holes of the plurality of cluster ventilation areas on the first pore plate, so that the air flow can be accurately controlled;
3. small sliding distance and simple driving mechanism
Because the second orifice plate with a plurality of large rectangular square holes is adopted to match with the first orifice plate with a plurality of clustered ventilation areas, the ventilation surface where the whole first orifice plate is positioned is decomposed into a plurality of repeated 'stepping' areas; thus, each repeated stepping area (i.e. clustered ventilation area) is very narrow as seen in the sliding direction of the dedicated second orifice plate, thereby bringing about the technical effects of small sliding distance and simple driving mechanism.
Examples
The embodiment provides a high-efficiency dehumidifying and drying device, which comprises an airflow channel with an air inlet and an air outlet, wherein at least one group of dehumidifying and drying units (heat pump units) are arranged in the channel, and each dehumidifying and drying unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation system; the air inlet is provided with a device for accurately and uniformly regulating the air flow in the embodiment 1; the wet air enters the channel from the air inlet, is cooled and dehumidified by the evaporator, is heated by the condenser to become high-temperature dry air, and is discharged through the air outlet.
In closed humid environments, such as underground shelters, rooms soaked by rainwater and the like, when the dehumidifying and drying device is adopted to perform dehumidifying and drying operation, the air inlet quantity of the evaporator needs to be adjusted:
because the compression work of the compressor of the dehumidifying and drying machine set is continuously converted into 'clean' input of heat to the closed space since the operation in the middle and later stages of dehumidifying and drying, the air temperature in the closed space such as an underground shelter where the dehumidifying and drying machine is positioned and a room soaked by rainwater is slowly increased; meanwhile, due to the continuous operation of the dehumidifying and drying unit, the water content of the wall body and the ground and the relative humidity of the air are reduced to lower levels;
under the condition that the air inlet quantity of an evaporator of the dehumidifying and drying device is unchanged, the temperature of the inlet air is increased, the absolute moisture content in the inlet air is reduced, so that the sensible heat load (the heat load of cooling and releasing the inlet air) of the evaporator is increased, and the damp-heat load (the heat load released by condensing water vapor in the inlet air) is reduced; with further increase of the temperature of the inlet air and further decrease of the absolute moisture content in the inlet air, the sensible heat load of the evaporator is further increased, and the damp-heat load is further reduced until the whole refrigerating capacity of the evaporator is used for absorbing the sensible heat load, the evaporator cannot filter out water, the dehumidifying function is stopped, and the dehumidifying dryer enters an invalid operation state;
therefore, the dehumidification drying operation in a closed environment requires continuous adjustment of the intake air quantity of the dehumidification dryer evaporator from large to small.
According to the embodiment, the air inlet of the evaporator is regulated by arranging the air flow precise and uniform regulating device at the air inlet of the efficient dehumidifying dryer; in the closed space, due to the fact that the dehumidification drying process is continuously carried out, the temperature of the inlet air of the dehumidification dryer is increased, the absolute moisture content in the inlet air is reduced, when the sensible heat load of the evaporator is increased and the damp heat load is reduced, the second orifice plate moves relative to the first orifice plate, the coverage proportion of the solid part of the second orifice plate to the cluster ventilation area on the first orifice plate is gradually increased, the air inlet quantity of the evaporator is correspondingly reduced, and therefore the sensible heat load of the evaporator is restrained from being increased, and the damp heat load is stabilized to ensure the dehumidification capacity of the dehumidification dryer.
Examples
Referring to fig. 7-8, the present embodiment provides a high-efficiency dehumidifying and drying device, which can be used for tobacco leaf drying, etc., comprising a tobacco leaf drying air flow circulation channel 3 with an air inlet 301 and an air outlet 302, and at least one group of heat pump units, wherein the heat pump units comprise a compressor 9, a condenser 5, a throttling device and an evaporator 6 which are sequentially connected and form a refrigerant circulation; the evaporator 6 is positioned in the ambient air outside the airflow circulation channel 3, and the condenser 5 is positioned in the airflow circulation channel; the air flow circulation channel 3 is also provided with a moisture discharging port 11 and a fresh air port 10, and the moisture discharging port 11 and the fresh air port 10 are both positioned on the air flow circulation channel 3 between the condenser 5 and the air inlet 301; the humidity discharging port 11 and the fresh air port 10 are provided with the air flow accurate and uniform regulating device described in the embodiment 1.
When the efficient dehumidifying and drying device provided by the invention is operated, the evaporator absorbs heat from the mixed air flow of the warm air outlet from the moisture outlet 11 and the ambient air and inputs the heat into the air flow circulation channel again, and as the temperature, the concentration of water vapor and the enthalpy of the mixed air flow are higher than those of the ambient air, the evaporation temperature, the evaporation pressure, the heating quantity and the heating energy efficiency ratio of the evaporator of the heat pump unit are obviously improved, and the positive feedback circulation of the heat is formed.
In the embodiment, a first fan 4 is arranged in the air circulation duct 3 close to the air outlet; the first fan 4 is used to push the air in the air circulation channel 1 to flow.
In the present embodiment, a second fan 7 is provided at one side of the evaporator 6 for allowing ambient air to smoothly flow through the evaporator 6, and the evaporator absorbs heat in the ambient environment and the exhaust air flow.
In this embodiment, a third fan 12 is disposed in the air circulation duct 3 near the moisture discharge port 11, so that a part of the moist air is smoothly discharged from the moisture discharge port 11 and flows to the evaporator 8.
In this embodiment, a drying space is further included, and the air inlet and the air outlet of the air circulation channel 3 are communicated with the drying space to form an air flow closed circulation drying channel, as shown in fig. 7.
In this embodiment, as shown in fig. 8 to 10, the first orifice plate on the fresh air port 10 and the first orifice plate on the moisture exhaust port 11 are connected together up and down to form a fixed orifice plate 14, the upper side of the fixed orifice plate 14 is provided with a ventilation area 1401 corresponding to the fresh air port 10, and the lower side is provided with a ventilation area 1402 corresponding to the moisture exhaust port 11; the second orifice plate on the fresh air port 10 and the second orifice plate on the moisture discharging port 11 are connected up and down to form a movable orifice plate 15, an air distribution port 1501 opposite to the ventilation area 1401 is arranged on the upper side of the movable orifice plate 15, and an air distribution port 1502 opposite to the ventilation area 1402 is arranged on the lower side of the movable orifice plate 15.
Further, as shown in fig. 10, the moving orifice plate 15 is synchronously driven by a driving device 13, and the driving device includes a connecting rod 1302 connected to the second orifice plate, and a power mechanism 1301 for driving the connecting rod to axially move, where the power mechanism 1301 can be implemented by a gear motor or a compressed air cylinder, etc., and is not limited herein.
In this embodiment, referring again to fig. 8-9, the size of the vent 1403 in the first orifice plate in the moisture removal port 11 is smaller than the size of the vent 1404 in the first orifice plate in the fresh air port 10 so that a jet of moisture removal airflow with a dynamic head is formed to cover the windward side of the evaporator.
The invention provides a tobacco leaf high-efficiency dehumidification drying device, wherein an air inlet 301 and an air outlet 302 are circularly connected with a drying space, when the drying space runs, an evaporator in a heat pump unit firstly absorbs heat of ambient air and then conveys the heat to a condenser through a compressor to heat circulating air flow in the drying space; the high-temperature circulating air flow in the drying room exchanges heat and humidity with tobacco leaves to promote the evaporation of the moisture in the tobacco leaves so as to form warm, wet and return air; when the wet bulb temperature of the warm, wet and return air exceeds the set target value of the baking process, the fresh air port 10 and the wet discharging port 11 are synchronously opened, fresh air is fed in, warm, wet air is discharged, and the warm, wet air is pushed by the third fan 12 to form a jet flow of the wet discharging air with a certain dynamic pressure head after passing through a plurality of vent holes on the wet discharging port 11, and is jetted and impacted on the windward side of the evaporator.
According to the invention, the quantity and the area of ventilation holes in each ventilation area can be regulated and controlled by sliding the second pore plate on the first pore plate according to the measured dropping speed of the wet bulb temperature in the drying space, so that the opening of the fresh air inlet 10 and the opening of the wet discharging outlet 11 are regulated:
(1) the wet bulb temperature in the drying room is fast reduced, so that the coverage of the second pore plate to the ventilation holes on the first pore plate is enlarged, the number and ventilation area of the ventilation holes in each ventilation area are reduced, and the opening of the fresh air port 10 and the moisture discharge port 11 are reduced, so that the moisture discharge speed is reduced;
(2) the wet bulb temperature in the drying room is slowly reduced, the coverage of the second pore plate to the ventilation holes on the first pore plate is reduced, the number and the ventilation area of the ventilation holes are enlarged, and the opening degree of the fresh air port 10 and the opening degree of the wet discharging port 11 are improved, so that the wet discharging speed is improved.
Further, in the present embodiment, the structures of the fresh air port 10 and the moisture discharge port 11 are different from each other:
(1) the aperture of the vent hole on the first pore plate of the fresh air port 10 is larger, so that the flow resistance of a fresh air path is reduced, and the fresh air intake is enlarged;
(2) the aperture of the vent hole on the first pore plate of the moisture discharge port 11 is smaller to improve the throttling resistance of the moisture discharge path, and under the strong pushing of the third fan 12, the warm moisture flow passes through the vent hole on the first pore plate and is injected into the air suction area of the outer evaporator by a higher dynamic pressure head to be mixed with the supplemented ambient air, and then evenly enters the gaps of the fins of the evaporator to cool, dehumidify and release heat;
according to the invention, through regulating and controlling the opening of the first pore plate and the second pore plate of the fresh air port 10 and the moisture discharging port 11, the basic balance of the property moisture rate and the moisture discharging rate of the tobacco curing house is realized, so that continuous moisture discharging and continuous waste heat recovery can be continuously carried out, wide fluctuation of the temperature of dry and wet balls of the tobacco curing house to a target value is effectively prevented, and thermal shock of intermittent moisture discharging to a heat recovery evaporator is effectively prevented.
The efficient tobacco leaf dehumidifying and drying device provided by the invention has the advantages that:
1. fresh air supplementing and external dehumidifying synchronization of tobacco flue-curing house is good
The invention adopts the same driving device to regulate and control the opening of the fresh air port on the air circulation air duct of the tobacco flue-curing house, the opening of the fixed pore plate and the opening of the movable pore plate on the moisture discharging port, the fresh air port on the circulation air duct and the moisture discharging port are synchronously opened and synchronously closed, and the partial opening of the moisture discharging port of the fresh air port is also synchronous, so that the fresh air supplement and the external moisture discharging have good synchronism.
2. Uniform air distribution
Because a large number of ventilation holes are uniformly densely distributed on a plurality of cluster ventilation areas on the fixed orifice plate, no matter how many rows of ventilation holes in the plurality of ventilation areas are covered by a solid plate area between the air distribution openings of the movable orifice plate, a plurality of rows of ventilation holes in the plurality of cluster ventilation areas which are not covered and leaked out are uniformly distributed on the whole ventilation section from the whole fixed orifice plate area, so that the uniformity of air flow is ensured;
3. accurate air distribution
A plurality of clustered ventilation areas are uniformly and densely distributed on the fixed pore plate, and a certain number of ventilation holes capable of being penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device just like a sieve hole;
the number of the ventilation holes which are accurately reserved is covered by the solid plate area between the movable pore plate air distribution openings on a plurality of cluster ventilation areas on the first pore plate, so that the air flow can be accurately controlled;
4. small sliding distance and simple driving mechanism
Because the movable orifice plate with a plurality of large rectangular square holes is adopted to match with the fixed orifice plate with a plurality of clustered ventilation areas, the ventilation surface where the whole fixed orifice plate is positioned is decomposed into a plurality of repeated 'stepping' areas; thus, each repeated stepping area (i.e. clustered ventilation area) is very narrow as seen in the sliding direction of the moving orifice plate, thereby bringing about the technical effects of small sliding distance and simple driving mechanism.
It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to these embodiments, but that variations and modifications can be made by one skilled in the art within the spirit and scope of the present invention as hereinafter defined in the appended claims.
Claims (13)
1. The efficient tobacco leaf dehumidifying and drying device is characterized by comprising an airflow circulation channel with an air inlet and an air outlet, which is used for connecting a heat pump unit and a tobacco leaf drying space, and at least one group of heat pump units, wherein the heat pump units comprise a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation;
the evaporators are all positioned in the ambient air outside the airflow circulation channel, and the condensers are all positioned in the airflow circulation channel; the air flow circulation channel is also provided with a moisture discharging port and a fresh air port, and the moisture discharging port and the fresh air port are both positioned on the air flow circulation channel between the condenser and the air inlet;
the humidity discharging port and the fresh air port are provided with devices for accurately and uniformly regulating air flow;
accurate even adjusting device of air flow includes:
a first orifice plate having a plurality of ventilation areas disposed thereon;
the second pore plate is provided with air distribution openings at positions corresponding to the ventilation areas on the first pore plate, and the air distribution openings can cover the ventilation areas;
the second pore plate and the first pore plate are overlapped, and the air distribution openings are in one-to-one correspondence with the ventilation areas; the second pore plate and the first pore plate can relatively move, and the overlapping part of each ventilation area and the air distribution opening is changed in the process of relatively moving, so that the air flow is regulated;
the wet bulb temperature of the tobacco leaf drying space is quickly reduced, so that the coverage of the second pore plate to the ventilation area on the first pore plate is enlarged, the ventilation area of the ventilation area is reduced, the opening of the fresh air inlet and the opening of the moisture discharging opening are reduced, and the moisture discharging speed is reduced;
the wet bulb temperature of the tobacco leaf drying space is slowly reduced, so that the coverage of the second pore plate to the ventilation area on the first pore plate is reduced, the ventilation area of the ventilation area is enlarged, the opening of the fresh air port and the opening of the moisture discharging port are improved, and the moisture discharging speed is improved;
the evaporator of the heat pump unit is arranged opposite to the moisture discharging port;
the second pore plate on the wet discharging port and the second pore plate on the fresh air port share a driving device and are synchronously driven.
2. The efficient tobacco leaf dehumidifying and drying device of claim 1, further comprising a tobacco leaf drying space, wherein the air inlet and the air outlet of the air flow circulation channel are communicated with the tobacco leaf drying space to form an air flow closed circulation drying channel.
3. The efficient tobacco leaf dehumidifying and drying device of claim 1, wherein the size of the ventilation hole on the first orifice plate on the dehumidifying port is smaller than the size of the ventilation hole on the first orifice plate on the fresh air port.
4. The efficient tobacco leaf dehumidifying and drying device of claim 1, wherein a first fan is arranged in the airflow circulation channel near the air outlet.
5. The efficient tobacco leaf dehumidifying and drying device of claim 1, wherein a second fan is provided at one side of the evaporator.
6. The efficient tobacco leaf dehumidifying and drying device of claim 1, wherein a third fan is arranged in the airflow circulation channel close to the dehumidifying port.
7. The efficient tobacco leaf dehumidifying and drying device according to claim 1, wherein a plurality of ventilation areas are uniformly distributed along the transverse or longitudinal interval of the first orifice plate, and a plurality of air distribution openings are uniformly distributed along the transverse or longitudinal interval of the second orifice plate; and the ventilation area and the air distribution opening have the same shape and size.
8. The efficient tobacco leaf dehumidifying and drying device of claim 7, wherein the ventilation area and the air distribution opening are rectangular.
9. The efficient tobacco leaf dehumidifying and drying apparatus of claim 7, wherein a moving direction between the first orifice plate and the second orifice plate is along an arrangement direction of the ventilation area.
10. The efficient tobacco leaf dehumidifying and drying apparatus as claimed in claim 9, wherein a distance between adjacent ventilation areas is equal to a distance between adjacent air distribution openings;
the distance between adjacent air distribution openings is larger than or equal to the size of the ventilation area in the moving direction between the first pore plate and the second pore plate.
11. The efficient tobacco leaf dehumidifying and drying device of claim 1, wherein at least one ventilation hole is arranged on the ventilation area.
12. The efficient tobacco leaf dehumidifying and drying device of claim 11, wherein at least one row of ventilation holes are uniformly distributed on the ventilation area, and a plurality of ventilation holes are uniformly distributed on each row.
13. The efficient tobacco leaf dehumidifying and drying device of claim 1, further comprising a driving device;
the first orifice plate is a fixed orifice plate, the second orifice plate is a movable orifice plate, the fixed orifice plate is fixed on the section of an air duct of which the air flow needs to be regulated, the movable orifice plate is movably arranged on the fixed orifice plate, and the driving device drives the movable orifice plate to move relative to the fixed orifice plate.
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| CN201911297012.4A CN110895096B (en) | 2019-12-13 | 2019-12-13 | Device for accurately and uniformly regulating air flow and efficient tobacco leaf dehumidifying and drying device |
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| CN113613452B (en) * | 2021-07-08 | 2023-12-19 | 深圳市洲明科技股份有限公司 | Ventilation pipeline and ventilation system |
| CN115183546A (en) * | 2022-06-21 | 2022-10-14 | 青岛海尔空调电子有限公司 | Drying system for tobacco and control method for tobacco |
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