EP0311802A2 - Installation de séchage pour des caisses, notamment pour sécher les compresseurs d'installations frigorifiques - Google Patents

Installation de séchage pour des caisses, notamment pour sécher les compresseurs d'installations frigorifiques Download PDF

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Publication number
EP0311802A2
EP0311802A2 EP88115005A EP88115005A EP0311802A2 EP 0311802 A2 EP0311802 A2 EP 0311802A2 EP 88115005 A EP88115005 A EP 88115005A EP 88115005 A EP88115005 A EP 88115005A EP 0311802 A2 EP0311802 A2 EP 0311802A2
Authority
EP
European Patent Office
Prior art keywords
station
drying system
drying
conveyor
vacuum
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.)
Withdrawn
Application number
EP88115005A
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German (de)
English (en)
Other versions
EP0311802A3 (fr
Inventor
Wolfgang Fuhrmann
Klaus Buchholz
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.)
JW Froehlich Maschinenfabrik GmbH
Original Assignee
JW Froehlich Maschinenfabrik GmbH
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 JW Froehlich Maschinenfabrik GmbH filed Critical JW Froehlich Maschinenfabrik GmbH
Publication of EP0311802A2 publication Critical patent/EP0311802A2/fr
Publication of EP0311802A3 publication Critical patent/EP0311802A3/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • 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
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/066—Movable chambers, e.g. collapsible, demountable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/042—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying articles or discrete batches of material in a continuous or semi-continuous operation, e.g. with locks or other air tight arrangements for charging/discharging

Definitions

  • the invention relates to a drying system according to the preamble of claim 1.
  • Compressor housings that are to be used for refrigeration systems consist of a pressure-resistant housing in which an AC motor for the compressor is generally installed. After the manufacture of such compressors, the housing, including the installed parts, must be brought to a residual moisture content which is very low. Water components would interfere with the functioning of the refrigeration systems.
  • the invention has for its object to design a drying system so that largely automated faster and more effective drying is possible.
  • the characterizing features of claim 1 are provided in a drying system of the type mentioned.
  • the preheating of the housing and the subsequent suction of the air still in the housing can, especially if this process is repeated leads to a very fast and intensive drying.
  • the winding of the motor which is present anyway, is used for heating and is supplied with direct current instead of alternating current.
  • the resultant heating of the motor winding is sufficient to bring the housing and motor and the air inside them to temperatures at which residual water is absorbed. This proportion of water is extracted with the air.
  • This type of heating can be dimensioned by controlling the voltage and / or by controlling the length of time during which the DC voltage is present so that no overheating occurs.
  • a vacuum device is advantageously provided according to claim 3, which acts in a suitable manner on the housing.
  • claims 10 to 13 have the advantage that the necessary electrical connection can also be disconnected in cycles and in a simple manner or can be applied together with the vacuum. Since this can be done several times in succession on the conveyor path, very intensive and effective drying can take place, for which the time required to extract the air is considerably less than for drying in a drying tunnel.
  • claims 14 to 17 open up the advantageous possibility of excluding improperly dried compressors from further processing without the compressors must be removed from their conveyor or from their pallets sealed by hoods.
  • the residual moisture content can also be determined with special measuring devices in the closed vacuum chamber. Refrigeration compressors that are not completely dry can therefore be subjected to a reject station and from there a renewed drying process without the need to put the compressors on pallets again.
  • An endless conveyor (1) is provided here, which is made up of two debris (1a and 1b) running parallel to one another but in opposite directions, each of which ends at the ends of the adjacent strand.
  • This conveyor can be designed, for example, as a roller conveyor on which the drying units to be explained are moved step by step by chains or by driven rollers.
  • This endless conveyor is arranged on a machine bed (35). It is assigned a vacuum device in the form of a vacuum pump (10) and a power supply unit (36).
  • a power supply device (37) which on the one hand provides for the drive of the conveyor and all moving parts, and on the other hand also includes a DC voltage source (7) with which the electrical heating of the motor windings is carried out in a manner to be explained.
  • the compressors (4) are fed to the conveyor (1) at a loading station (22). As will be explained with reference to FIG. 2, they are placed there on pallets (2) which arrive in front of the loading station (22) from an unloading station (23) arranged directly next to them. The unloaded compressors are brought back onto the conveyor belt (40) and conveyed away in the direction of the arrow (41).
  • the pallets (2) can be guided on rollers (21) of a roller conveyor, wherein they are received at the individual stations by further rollers (20 '), which are not driven.
  • the pallets (2) are provided with vertically upward-pointing support arms (3), three of which, in the exemplary embodiment, are arranged uniformly distributed around a recess (42) in the pallet (2).
  • These support arms (3) engage under a flange (430) of the refrigeration compressors (4) and thus hold the refrigeration compressor in a certain aligned position, which is also determined by the fact that a swivel arm (12) provided on the side next to the support arms (3) which is pivotally attached to the pallet (2), engages between tabs (43) which are arranged on the compressor (4).
  • Electrical contacts (8) are arranged on the swivel arm (12), which are brought into connection with the connection contacts (9) of the motor winding when the swivel arm (12) is brought from its original position into the position shown in solid lines in FIG. 2.
  • the contacts (8) are each connected via a connecting line (44) to electrical contacts (11) which are arranged in the recess (42) on the pallet base (2a).
  • These contacts (11) can be contacted by electrical contacts (19) of a lifting device (20), which are designed and arranged so that they come into contact with the mating contacts (11) when the lifting device (20) is raised. When this is done, direct current is applied to the Given motor winding, which heats up and - after a certain time provides for the desired heating of the compressor (4).
  • the pallets reach the station (5), in which the hoods (13) shown in FIG. 2 are placed tightly on the pallet (2). From this point on, the compressors therefore continue to run in the pressure chambers formed by the pallets (2) and the hoods (13) in the form of the units (46) until they reach the station (1) on the conveyor (1b) of the conveyor (1). 28) reach where the hoods (13) are removed and brought to the station (27), which coincides with the station (5) at which the hoods (13) are replaced and at the same time electrical energy is again applied to the contacts (9) becomes. At the following station (6) there is a further brief heating and at the same time the first evacuation process.
  • each hood is provided in its cover (4a) with an opening (15) which is designed for tight connection to a connecting line (17) which is connected to the vacuum device (10) way not shown is connected.
  • This tight fitting is achieved by lifting the unit (46) from the lifting device (20), which is also present at the station (6), in the direction of the arrow (47).
  • the opening (15) abuts with its sealing edge (48) on the counter sealing surface and the seal (49) of the connecting line (17).
  • pin (18) pressed against the poppet valve (16)
  • This evacuation process is repeated at the stations (6 ', 6 ⁇ , 6 ′′′, 6 ⁇ ⁇ ), electrical energy also being emitted to the motor winding via the contacts (11 and 9), so that a brief heating takes place.
  • a test station (24) is coupled to the last station (6 ⁇ ⁇ ), by means of which the residual moisture content in the still closed unit (46) is measured. Since the interior of the unit (46) is connected to the interior of the compressor (4) via the open connecting pieces (50) of the compressor (4), the residual moisture content inside the compressor can also be measured in this way. In the exemplary embodiment, this can be carried out very precisely with a mass spectrometer test system.
  • the unit (46) passes the test station (24) and is freed from the hood (13) at the station (28), so that from here on only the compressor (1b) on the run (4) on the then open pallet (2). It is moved on the switch (30) to the other side of the conveyor and removed from the pallet at the unloading station (23).
  • a swivel lever (25) is brought from its original position into a second position.
  • This swivel lever therefore serves as a coding device which, when conveying on at the station (28), ensures that the hood (13) is not removed, but that the unit (46) is conveyed on to the switch (30) and then into one Committee area (26) is released, from which it can be subjected to a renewed drying on the run (1a).
  • the unit in the reject area (26) can only be removed if the residual moisture content is not reached even after repeated drying and there is therefore another fault.
  • Fig. 6 shows the aligned position of the compressor (4) on the pallet (2).
  • FIG. 7 shows a representation that largely corresponds to FIG. 1.
  • the drying system shown there also has a station (31) behind the station (28) for filling the compressor housing (4) with dry nitrogen and then removing the hoods (13), at which the oil for engine lubrication can be filled , and another station (32) at which a final function test can be carried out.
  • the compressors processed in this way with the new system are ready for operation when they have reached the conveyor (40) again.
  • a drying system is shown, in the pallets (2 '), which may otherwise be formed in a similar manner as in the embodiment of Fig. 1 or 7, at a loading station (22') with the compressor housings (4).
  • the pallets (2 ') are guided in this system at the loading station on a turntable (53) which the end of the conveyor for the pallet and for the compressor housing with both the loading station (22') and the unloading station (23 ' ) and again with the beginning of the conveyor (1 ′) connects.
  • the loaded pallets (2 ') are conveyed on the conveyor (1') in the direction of the arrow (56) and in the course of the conveyor (1 '), similar to the embodiment of FIGS. 1 and 7, at heating stations (6' ) each heated, which can happen by contacting the contacts provided on the pallets with stationary contacts and by loading the motor winding in the compressor housing.
  • the housing is also warmed up from the outside to such an extent that it has a temperature which is above room temperature. In this respect, loading and heating do not differ from the devices in FIGS. 1 and 7.
  • station (5) is omitted in the exemplary embodiment in FIG. 8.
  • the housing located on the pallets (2 ') are not closed by a hood, but remain open on the pallet and are heated in this state.
  • the pallets with the compressor housings then reach the end of the conveyor (1 ') and are pushed for example by a pusher (62) in the direction of the arrow (57) until they are in front of the inlet openings (58 and 59) of two parallel vacuum tunnels (61 and 62) arrive, the front and rear ends of which can be sealed off by doors (55 and 54).
  • These two parallel vacuum tunnels alternately receive pallets with preheated compressor housings, each as many pallets as can be inserted into the tunnel (61 or 62) by the assigned insertion device (62).
  • the other vacuum tunnel in this case the tunnel (61) is tightly sealed and is evacuated.
  • the still closed Vacuum tunnels (61 and 62) are filled with dry nitrogen before opening, so that the compressor housings in the respective vacuum tunnel are also filled with nitrogen.
  • the compressors are successively guided in the direction of arrow (63) to a vacuum test station (24 '), one after the other in this test station for residual moisture, which is also done in this case with a mass spectrometer test system.
  • Each individual compressor is then transported in the direction of arrow (64).
  • the associated palette can, as already described in the other exemplary embodiments, be encoded accordingly.
  • the turntable (52) of the unloading station (23 ') is conveyed to the start of the conveyor (1'), whereas those which are not in order are returned.
  • the test station (24 ′) it is also possible, as in the other exemplary embodiments, to connect the test station (24 ′) to further stations in which the compressors are filled, for example, with lubricating oil or subjected to a functional test. In the exemplary embodiment shown, however, this is also possible at the station (65), which is located in the region of the turntable (52) and can be approached by the turntable.
  • the compressors are brought to a temperature of about 80 ° C. before reaching the vacuum chamber.
  • the degree of dryness can be of the order of magnitude of approx. 60 mg absolute moisture, whereby the maximum water vapor content of the compressor before drying can be approx. 1000 mg. 8 can be designed so that it can dry about 400 parts per hour. This enables very economical drying.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Compressor (AREA)
EP88115005A 1987-10-10 1988-09-14 Installation de séchage pour des caisses, notamment pour sécher les compresseurs d'installations frigorifiques Withdrawn EP0311802A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873734364 DE3734364A1 (de) 1987-10-10 1987-10-10 Trocknungsanlage fuer gehaeuse, insbesondere zum trocknen der kompressoren fuer kaelteanlagen
DE3734364 1987-10-10

Publications (2)

Publication Number Publication Date
EP0311802A2 true EP0311802A2 (fr) 1989-04-19
EP0311802A3 EP0311802A3 (fr) 1990-07-11

Family

ID=6338084

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EP88115005A Withdrawn EP0311802A3 (fr) 1987-10-10 1988-09-14 Installation de séchage pour des caisses, notamment pour sécher les compresseurs d'installations frigorifiques

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EP (1) EP0311802A3 (fr)
DE (1) DE3734364A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548746A1 (fr) * 1991-12-26 1993-06-30 Nikku Industry Co., Ltd. Dispositif de séchage sous vide
CN112665360A (zh) * 2020-12-08 2021-04-16 苏州良浦住宅工业有限公司 一种装配式建筑墙板类构件工业流水线
CN115111894A (zh) * 2022-06-20 2022-09-27 陈钰桂 一种具有抑菌功能的肠衣干燥设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049711A (en) * 1934-01-12 1936-08-04 Robert R Lundy Drying oven
US2858795A (en) * 1954-05-24 1958-11-04 British Insulated Callenders Apparatus for drying and impregnating small articles
US3006077A (en) * 1958-03-03 1961-10-31 Production Control Units Inc Apparatus for dehydration of refrigeration hermetic compressors
BE647200A (fr) * 1963-04-29 1964-08-17
US3321842A (en) * 1962-11-06 1967-05-30 Bocciardo Paolo Process and means for the stepwise drying under vacuum and successive conditioning, in a continuous operation, of tanned skins and the like
DE1912371A1 (de) * 1969-03-12 1970-10-01 Ernst Huebers Vorrichtung zur Bearbeitung von Gegenstaenden unter Druck
EP0177298A1 (fr) * 1984-09-28 1986-04-09 Ngk Insulators, Ltd. Système de convoyeur avec un dispositif pour évacuer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212307B (de) * 1964-12-18 1966-03-10 Niehoff Kommandit Ges Maschf Vorrichtung zum Waermebehandeln von metallischem Stranggut, insbesondere von duennen Kupferdraehten, durch elektrisches Widerstandserhitzen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049711A (en) * 1934-01-12 1936-08-04 Robert R Lundy Drying oven
US2858795A (en) * 1954-05-24 1958-11-04 British Insulated Callenders Apparatus for drying and impregnating small articles
US3006077A (en) * 1958-03-03 1961-10-31 Production Control Units Inc Apparatus for dehydration of refrigeration hermetic compressors
US3321842A (en) * 1962-11-06 1967-05-30 Bocciardo Paolo Process and means for the stepwise drying under vacuum and successive conditioning, in a continuous operation, of tanned skins and the like
BE647200A (fr) * 1963-04-29 1964-08-17
DE1912371A1 (de) * 1969-03-12 1970-10-01 Ernst Huebers Vorrichtung zur Bearbeitung von Gegenstaenden unter Druck
EP0177298A1 (fr) * 1984-09-28 1986-04-09 Ngk Insulators, Ltd. Système de convoyeur avec un dispositif pour évacuer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548746A1 (fr) * 1991-12-26 1993-06-30 Nikku Industry Co., Ltd. Dispositif de séchage sous vide
CN112665360A (zh) * 2020-12-08 2021-04-16 苏州良浦住宅工业有限公司 一种装配式建筑墙板类构件工业流水线
CN115111894A (zh) * 2022-06-20 2022-09-27 陈钰桂 一种具有抑菌功能的肠衣干燥设备
CN115111894B (zh) * 2022-06-20 2023-09-19 重庆市友谊畜产品有限公司 一种具有抑菌功能的肠衣干燥设备

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Publication number Publication date
DE3734364C2 (fr) 1990-02-08
DE3734364A1 (de) 1989-04-20
EP0311802A3 (fr) 1990-07-11

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