EP0091929B1 - Konditioniervorrichtung - Google Patents

Konditioniervorrichtung Download PDF

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Publication number
EP0091929B1
EP0091929B1 EP82903174A EP82903174A EP0091929B1 EP 0091929 B1 EP0091929 B1 EP 0091929B1 EP 82903174 A EP82903174 A EP 82903174A EP 82903174 A EP82903174 A EP 82903174A EP 0091929 B1 EP0091929 B1 EP 0091929B1
Authority
EP
European Patent Office
Prior art keywords
conditioning
bed
duct
conditioning apparatus
bleed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82903174A
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English (en)
French (fr)
Other versions
EP0091929A1 (de
Inventor
Derrick William Brooks
Christopher Philip Morris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hambro Machinery Ltd
Original Assignee
Hambro Machinery Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hambro Machinery Ltd filed Critical Hambro Machinery Ltd
Priority to AT82903174T priority Critical patent/ATE18975T1/de
Publication of EP0091929A1 publication Critical patent/EP0091929A1/de
Application granted granted Critical
Publication of EP0091929B1 publication Critical patent/EP0091929B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • 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
    • A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
    • F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer

Definitions

  • This invention relates to conditioning apparatus and more particularly concerns apparatus for conditioning material such as leaf vegetable material of a fibrous nature.
  • Conditioning generally relates to adjusting the temperature and/or moisture content of the material, e.g. by drying, moisturising, heating and/or cooling the material.
  • Prior British Patent Specification No. 1486555 describes an apparatus for drying tea in which the tea to be dried is maintained in a fluidised state in a bed above a perforated plate. Drying air is blown through the perforations in the plate at a rate which maintains the tea in the desired state of fluidisation.
  • the tea may be fed along the plate to a further condioning stage or a discharge conveyor by applying an appropriate vibration to the plate and control of the rate of flow may be affected by disposing one or more weirs at the ends of the plate.
  • U.K. patent no. 2026668A describes a conditioning apparatus for conditioning leaf material such as tea or tobacco utilising a particular type of gas distribution means for maintaining the leaf material to be conditioned in a fluidised state.
  • the flow of conditioned material to a next conditioning stage or to a discharge conveyor is controlled by means of weirs.
  • This specification discloses a fluidised bed dryer having a perforated bed to which conditioning medium can be supplied in order to establish a conditioning zone above the bed in which the leaf material can be maintained in a fluidised state.
  • the bed is supported above a plenum chamber which is arranged to be supplied with a condition medium through a pipe.
  • This pipe communicates with two ducts, which ducts communicate with an inlet duct; the inlet duct is supplied with the conditioning medium by means of a fan.
  • a heater may be disposed in one of said two ducts and adjustable baffles can be provided to control the air flow therethrough.
  • the feed may be leaf tobacco or may be derived from other sources such as stem (e.g. cut rolled stem).
  • conditioning apparatus for conditioning a leaf vegetable material of a fibrous nature, which apparatus comprises a perforate bed whereby gaseous conditioning medium may be supplied through the perforations to establish a conditioning zone immediately above the bed whereby, in use, the material can be maintained effectively in a fluidised state, the bed being supported above a penum chamber arranged to be supplied with conditioning medium, the conditioning medium being supplied from means comprising an inlet duct for conditioning medium under pressure, said inlet duct communicating with a first and a second duct, and heating means being provided in said first duct, characterised by the first and second ducts each communicating with said plenum chamber, bleed-off means associated with at least one of said first and second ducts whereby the relative proportions of heated and unheated conditioning medium entering the plenum chamber can be adjusted, and the bed being supported in a frame in a manner which permits adjustment of the configuration of the bed relative to the frame at least in a direction of feed of the material to be conditioned.
  • the bleed-off means is controlled automatically to respond to a measurement of a condition of the material being conditioned or gaseous conditioning medium
  • a balancing throttle is associated with one of said ducts, preferably the inlet duct, in order to control the pressure in the plenum chamber.
  • the inlet duct is provided with a take-off duct and said bleed-off means includes a duct, the take-off duct and bleed-off duct being controlled by a common adjustable baffle and communicating with a duct incorporating said balancing throttle.
  • adjustable supporting means are provided at or adjacent each corner of a rectangular bed whereby adjustment may be effected in both the direction of feed of material and a direction transverse thereto.
  • the dwell time of the material in the conditioning zone can be controlled by adjusting the angle of the bed to achieve the desired rate of flow. Furthermore with preferred arrangement described above transverse adjustment can be effected to ensure that an even flow across the width of the bed is achieved.
  • the bed may be arranged to vibrate and in this case the dwell time of the material in the conditioning zone may also be determined by the vibration frequency; to this end it is preferred to use a vibrating frequency of 300 to 1500 cycles per minute.
  • each supporting means for the bed comprises a height adjustment means and is advantageously associated with resilient means the tension of which can also be adjusted. In this way, not only is it possible to adjust the angular disposition of the bed, but it is also possible to adjust the resilient means in order to obtain a uniform vibration.
  • the invention also includes a conditioning plant including one or more apparatus as described above.
  • One such other condition which may be adjusted is moisture content, e.g. by the injection of steam.
  • a conditioning plant comprises a feed conveyor 30 for leaf material to be conditioned, three conditioning apparatus 31, 32, and 33 and a discharge position 34 for leaf material which has been conditioned.
  • Conditioning air is supplied to each apparatus by means of an individual filter 48 and a fan 37 which forces the air along ducts 38, incorporating heaters 46 towards plenum chambers 39 in each conditioning apparatus (see Figure 2).
  • the heaters 46 are steam heated heat-exchange elements but if desired, heat exchange elements heated by other means may be employed for example, gas, oil, wood or electricity.
  • Each duct 38 may be provided with an inlet pipe with valve (not shown) which can be used to add additives to the air flowing into the plenum chamber 39.
  • One additive which is frequently used in conditioning apparatus is live steam to increase the moisture content of the conditioning air.
  • the air passes through heaters 46 to each plenum chamber 39 and then through a perforate bed 41 in to a fluidised conditioning zone 42 where it maintains the leaf material to be conditioned in a fluidised state (see Figure 2).
  • the air which emerges from the conditioning zone 42 is confined by each housing 43 and is extracted by means of a common air extractor hood and duct 44.
  • the housing 43 of one or more of the conditioning apparatus may include one or more adjustable baffles above the conditioning zone 42 in order to obtain a desired air flow pattern.
  • the perforate bed 41 comprises a rectangular perforate plate 11 disposed in a bed frame 10 supported by means of adjustable supporting means 12 arranged one at each corner of the frame 10.
  • each supporting means 12 is shown in detail in Figure 3.
  • a threaded rod 13 is received in a threaded bore 14 in a main frame support member 25 and is retained in its adjusted position by a lock-nut 23.
  • the other end of the rod 13 carries a washer 26 a rubber bush 27 and a washer 28.
  • a threaded axial bore at the upper end of the rod 13 receives a bolt 24 to hold the rubber bush 27 in position.
  • a plate 16a is welded to the bracket 16 and includes a bore 19 to receive the rubber bush 27, thereby providing a mounting for the bracket 16 which is secured to the bed frame 10.
  • the use of the rubber bush 27 accommodates a small amount of lateral vibration of the perforate plate 41.
  • a coil compression spring 17 is disposed coaxially with the tube 13 beneath the plate 16a and is located by a spigot 18 welded to the plate 16a at one end and at the other end by a spigot 20 on an adjusting ring 21.
  • the adjusting ring 21 includes three radially equally distributed holes 21a into which a bar may be inserted to rotate the ring and thereby adjust the compression of the spring 17.
  • a lock nut 22 is provided.
  • Adjustment for height is effected by rotating the rod 13 with respect to the frame support member 25 to the desired extent and the rod 13 is then retained in its adjusted position by means of the lock nut 23.
  • One or more vibration motors may be used to effect vibration of the bed 41.
  • two such vibration motors 45 are fixed to each bed, one on each side thereof.
  • vibrations it is preferred to arrange the vibrations to take place mainly in a vertical plane and these vibrations are, of course, permitted by the compression spring 17.
  • leaf material which is to be conditioned is fed by means of the feed conveyor 30 in to the first conditioning apparatus 31 where it progresses along the bed by virtue of it being in a fluidised state and by virtue of angle and the vibration of the bed.
  • the facility for height adjustment at each corner of the plate enables an even thickness of fluidised bed to be achieved laterally and also enables the plate to be angled longitudinally to provide a suitable flow (and hence dwell time) of the particular material being conditioned. Furthermore, the facility for adjustment of each spring enables equalisation of the vibration of the bed to be achieved. These adjustments give close control of the conditioning process. Furthermore the use of wiers is obviated, which is advantageous as they can cause problems when fibrous material such as tobacco is being conditioned.
  • the arrangement of the apparatus described above may be used to carry out a wide variety of conditioning processes.
  • the provision for heating the conditioning air enables the apparatus to be used for drying, which may be carried out at temperatures up to 350°C, and the drying air may have a controlled humidity level by virtue of the provision for adding live steam.
  • the residence time may vary over a wide range from a few seconds up to about ten minutes depending the material and conditioning required.
  • sensing means could be provided to measure a specific quality of the leaf material, such as moisture content, this measurement could be compared with a predetermined desired measurement, the difference being used as a feed-back to the adjusting means which may then be adjusted, for example, by suitable servo motors.
  • At least one of the apparatus in the conditioning plant is provided with a conditioning medium temperature control system. Usually this will comprise the final apparatus in the plant.
  • Tobacco which is required to be conditioned has a wide variation in moisture content but it is desired that the conditioned tobacco has a predetermined moisture content, for example 14 to 21% by weight.
  • the temperature of the conditioning air can be adjusted by adjusting the heat transferred by the heating means, e.g. by controlling the rate of feed or temperature of steam fed to heaters comprising steam heat exchangers. Such an arrangement can give a coarse adjustment of the temperature of the conditioning air fed to the associated plenum chamber.
  • the duct 38 comprises an inlet portion 50 which is divided into upper and lower ducts 51 and 52 by means of a baffle 53.
  • the air passing through the upper duct 51 is heated by the heater 46 but the air passing through the lower duct 52 is not heated.
  • a bleed-off duct 54 communicates with the upper duct 51 and the bleed-off is controlled by a pivoted baffle 55.
  • a take-off duct 56 is also controlled by the baffle 55 and communicates with the inlet portion 50 of the duct.
  • the ducts 54 and 56 are combined downstream of the pivoted baffle 55 in a duct 57 controlled by a balancing throttle 58.
  • the balancing throttle 58 is adjusted to give sufficient resistance in the take-off duct to provide the desired pressure in the plenum chamber 39.
  • Such a balancing throttle is employed in each apparatus in the plant but not in association with a bleed-off arrangement as in the third apparatus to provide temperature control.
  • the temperature control system operates as follows.
  • a moisture-sensitive probe (not shown) is arranged to detect the moisture content of the tobacco about to be discharged. If there is a deviation from the desired moisture content this is utilised to provide an electrical feedback to motor 59 which controls the position of the pivoted baffle 55.
  • the baffle When the moisture content is low the baffle can be moved to the extreme position shown in Figure 4. In this position heated air, illustrated by the black arrows, is bled-off by way of the duct 54 to provide cooler air at the discharge end of the apparatus. Unheated air is illustrated by white arrows.
  • the baffle When the moisture content is high the baffle can be moved to the extreme position shown in Figure 5. In this position heated air is not bled-off but cold air from the inlet portion 50 of the duct is taken off. Thus a higher proportion of heated air is fed to the plenum chamber.
  • control system described above provides a simple, effective and very quick-reacting temperature adjustment of conditioning air.
  • the heat in any air which is bled-off can of course be utilised by returning airfrom the balancing throttle 58 to a previous apparatus.
  • the electrical feed back to control the position of the baffle can be instantaneous or, if desired, a controlled time delay can be introduced.
  • the motor controlled pivoted baffle 55 provides a quick-reacting fine adjustment but in order to accommodate wide variations in the moisture- content of the feed to the apparatus it is desirable to provide a coarse temperature control which will tend to try to maintain the baffle 55 at its mean position mid-way between that shown in Figure 4 and in Figure 5.
  • a suitable coarse control comprises a standard steam temperature probe arranged to measure the temperature of the bleed-off air. The temperature detected by this probe is utilised to control the flow of steam into the steam heated heat exchanger.
  • An alternative method to give a coarse control of the conditioning air is to control fan speed.
  • the fan speed can be controlled by limit switches which detect the position of the baffle.
  • Conditioning apparatus of the type described above has many advantages over conventional apparatus such as the rotary drier. These advantages include even air distribution, rapid response to a change in conditioning air, and a controlled flow of material along the bed.
  • the improved apparatus according to the present invention enhances these advantages as a great degree of control is possible. Thus not only can the rate of flow across the bed be closely controlled but the bed can also be controlled in a direction transverse to the flow.
  • the conditioning can be monitored at any stage e.g. by using moisture and/or temperature detectors both along and across the bed and the configuration of the bed and/or the nature of the conditioning air can be rapidly adjusted to achieve the desired result.
  • the apparatus and plant of the present invention thus provide a very desirable means of conditioning tobacco giving precise moisture content, enhanced product expansion and energy conservation due to efficient heat transfer.
  • the conditioned product is also improved due to gentler handling and lower product degradation.
  • the adjustment facility enables sufficient control for the apparatus to be used to separate certain components from a material being conditioned. For example, it is possible during conditioning of tobacco to classify the tobacco and separate relatively heavy and unacceptable products as they tend to 'sink' in the fluidised mass of material in the conditioning zone.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Paper (AREA)
  • Confectionery (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Drying Of Solid Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (9)

1. Konditioniervorrichtung (33) zum Konditionieren von pflanzlichem Blattmaterial von faseriger Beschaffenheit, wobei die Vorrichtung eine perforierte Unterlage (41) aufweist und ein gasförmiges Konditioniermedium durch die Perforationen geleitet wird, um unmittelbar über der Unterlage (41) eine Konditionerzone (42) zu schaffen, wobei das Material während der Benutzung der Vorrichtung in verwirbeltem Zustand gehalten ist, wobei die Unterlage (41) über einer Plenumkammer (39), welche mit dem Konditioniermedium versorgt ist, angeordnet ist; das Konditioniermedium wird über Einrichtungen zugeführt, die über eine Einlaßleitung (50) für das, unter Druck stehende Konditioniermedium verfügen, wobei die Einlaßleitung (50) mit einer ersten und einer zweiten Leitung (51, 52) und mit Heizeinrichtungen (42) in der ersten Leitung (51) in Verbindung stehen, dadurch gekennzeichnet, daß die erste und zweite Leitung (51, 52) mit der -Plenumkammer (39) in Verbindung stehen, wobei an mindestens einer der ersten und zweiten Leitungen (51, 52) Auslaßeinrichtungen (54) angeschlossen sind, mit welchem das Verhältnis von geheiztem und ungeheiztem Konditioniermedium, welches in die Plenumkammer (39) gelangt, einstellbar ist, wobei die Unterlage (41) derart in einem Rahmen (10) angebracht ist, daß die Anordnung der Unterlage (41) relativ zum Rahmen (10) mindestens in Abführrichtung des zu konditioneirenden Materials einstellbar ist.
2. Konditioniervorrichtung (33) nach Anspruch 1, dadurch gekennzeichnet, daß die Auslaßeinrichtungen (54) automatisch gesteuert sind, um auf Zustandsmessungen des zu konditionierenden Materials oder des gasförmigen Konditioniermediums zu reagieren.
3. Konditioniervorrichtung (33) nach Anspruch 2, dadurch gekennzeichnet, daß der zu messende Zustand der Feuchtigkeitsgehalt ist.
4. Konditioniervorrichtung (33) nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß die Auslaßeinrichtungen (54) eine Leitung (54) mit einer einstellbaren Drosselklappe (55) versehen ist.
5. Konditioniervorrichtung (33) nach einem der Ansprüche 1-4, dadurch gekennzeichnet, daß in mindestens einer der Leitungen (50, 51, 52) eine Ausgleichsklappe (58) zur Druckregulierung in der Plenumkammer (39) vorgesehen ist.
6. Konditioniervorrichtung (33) nach Anspruch 5, dadurch gekennzeichnet, daß eine, mit der Einlaßleitung (50) in Verbindung stehende Leitung (56) mit der Ausgleichsklappe (58) in Verbindung steht und auch die Auslaßeinrichtungen (54) mit der Ausgleichsklappe (58) in Verbindung stehen.
7. Konditioniervorrichtung (33) nach Anspruch 4, 5 und 6, dadurch gekennzeichnet, daß eine einstellbare Drosselklappe (55) vorgesehen ist, um den durch die Leitung (56) und die Auslaßeinrichtungen (54) führenden gasförmigen Mediumstrom zu steuern.
8. Konditioniervorrichtung (33) nach einem der Ansprüche 2-7, dadurch gekennzeichnet, daß zur Steuerung der Heizeinrichtungen (46) in der ersten Leitung (51) eine Zustandsmessung des zu konditionierenden Materials oder des gasförmigen Konditioniermediums vorgenommen wird.
9. Konditioniervorrichtung (33) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Unterlage (41) rechtwinklig ist und an jeder Ecke bzw. nahe jeder Ecke einstellbare Stützeinrichtungen (12) vorgesehen sind, wobei Einstellungen in Flußrichtug des Materials und quer dazu möglich sind.
EP82903174A 1981-10-27 1982-10-25 Konditioniervorrichtung Expired EP0091929B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82903174T ATE18975T1 (de) 1981-10-27 1982-10-25 Konditioniervorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8132310 1981-10-27
GB8132310 1981-10-27

Publications (2)

Publication Number Publication Date
EP0091929A1 EP0091929A1 (de) 1983-10-26
EP0091929B1 true EP0091929B1 (de) 1986-04-09

Family

ID=10525415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82903174A Expired EP0091929B1 (de) 1981-10-27 1982-10-25 Konditioniervorrichtung

Country Status (7)

Country Link
EP (1) EP0091929B1 (de)
JP (1) JPS58501805A (de)
AT (1) ATE18975T1 (de)
DE (1) DE3270467D1 (de)
GB (1) GB2119495B (de)
IT (1) IT1153591B (de)
WO (1) WO1983001560A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104287083A (zh) * 2014-10-28 2015-01-21 重庆大学 具有均匀送风的节能型气流上升式密集烤房

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8409766D0 (en) * 1984-04-14 1984-05-23 Hambro Machinery Ltd Flutriator
DE102006008100B8 (de) * 2006-02-20 2009-02-12 Ijzerlo Holding B.V. Verfahren zum Trocknen von Gütern in einem Wirbelschichttrockner und Wirbelschichttrockner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245881A (en) * 1939-07-17 1941-06-17 Vissac Gustave Andre Apparatus for drying fine granular materials
GB868675A (en) * 1958-03-26 1961-05-25 Gascoignes Reading Ltd Improvements relating to the drying of granular, powdered and other flowable materials
FR1451463A (fr) * 1965-07-20 1966-01-07 Strasbourg Forges Appareil de traitement pour produits fragmentaires
US4241515A (en) * 1971-01-27 1980-12-30 Hauni-Werke Korber & Co. Kg Method and apparatus for conditioning tobacco
US3974839A (en) * 1971-10-19 1976-08-17 Hauni-Werke Korber & Co., Kg Conditioning of tobacco
FR2190693B1 (de) * 1972-07-04 1978-03-03 Neu Sa
GB1504282A (en) * 1974-02-16 1978-03-15 Farrel Bridge Ltd Methods of and apparatus for treating particulate material with a gas
DE2724037A1 (de) * 1977-05-27 1978-12-07 Hauni Werke Koerber & Co Kg Vorrichtung zum trocknen eines kontinuierlich gefoerderten tabakstromes
JPS54110001A (en) * 1978-02-15 1979-08-29 Nakamura Process Kogei Method of applying input to grooving camera through video member
DK68580A (da) * 1980-02-15 1981-08-16 Niro Atomizer Ag Apparat til behandling af et pulver eller partikelformet produkt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104287083A (zh) * 2014-10-28 2015-01-21 重庆大学 具有均匀送风的节能型气流上升式密集烤房
CN104287083B (zh) * 2014-10-28 2015-10-28 重庆大学 具有均匀送风的节能型气流上升式密集烤房

Also Published As

Publication number Publication date
WO1983001560A1 (en) 1983-05-11
IT8223925A0 (it) 1982-10-26
DE3270467D1 (en) 1986-05-15
IT1153591B (it) 1987-01-14
ATE18975T1 (de) 1986-04-15
GB2119495A (en) 1983-11-16
JPS58501805A (ja) 1983-10-27
GB2119495B (en) 1985-09-18
EP0091929A1 (de) 1983-10-26
GB8313368D0 (en) 1983-06-22

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