EP3380799A1 - Procede et installation de sechage d'enceinte sous vide - Google Patents
Procede et installation de sechage d'enceinte sous videInfo
- Publication number
- EP3380799A1 EP3380799A1 EP16808941.5A EP16808941A EP3380799A1 EP 3380799 A1 EP3380799 A1 EP 3380799A1 EP 16808941 A EP16808941 A EP 16808941A EP 3380799 A1 EP3380799 A1 EP 3380799A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- enclosure
- chamber
- repetition
- air
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001035 drying Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- 230000000977 initiatory effect Effects 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction
Definitions
- the present invention relates to the field of enclosure drying.
- the enclosure contains objects that hinder the passage of hot air and prevent it from reaching areas of the enclosure and / or objects that will remain wet especially if these areas have a conformation favoring a water accumulation.
- the use of heat can sometimes damage elements of the enclosure (such as joints) or objects contained therein.
- An object of the invention is to improve the drying of an enclosure. More specifically, the objective is to evacuate the water from the enclosure as quickly as possible and as completely as possible and, preferably, to be able to guarantee the absence of water in the enclosure by an indirect method.
- a method of drying an enclosure comprising the steps of:
- controlling said means for extracting air from the chamber until reaching a first pressure controlling said means for initiating a repetition of pressure rise cycles to a second pressure and a descent adjacent to the first pressure, the first pressure and the second pressure being within a water evaporation range,
- the water contained in the chamber is liquid.
- the method of the invention makes it possible to vaporize all or almost all the water contained in the enclosure without going through a state of water other than steam. It is known that the energy required to pass from the liquid state to the vapor state is less important than the energy required to pass from the solid state to the vapor state for the same amount of liquid. It is recalled that the triple point of the water is obtained at the temperature of 0 ° C and the pressure of 6.01 mbar. For this pair of temperature and pressure, the water present in liquid form will solidify and then sublimate, which is not sought in the method of the invention.
- the pressure range for vaporizing the water does not require a high level of vacuum and therefore allows the use of a relatively inexpensive and therefore less expensive air extraction technology.
- the process of the invention is therefore particularly advantageous.
- FIG. 1 is a schematic view of an installation for implementing the method of the invention
- FIG. 2 is a diagram showing the curve
- FIGS. 3 to 6 are diagrams superimposing a reference pressure curve Cr (enclosure considered as dry) and the pressure curve C during the implementation of the method of the invention applied to a wet enclosure, each of these figures shows a criterion for stopping the drying process;
- FIG. 7 is a partial diagram showing a reference curve Cr (enclosure considered to be dry) and the pressure curve C during the implementation of the method of the invention applied to a humid enclosure, this figure highlighting a other criteria for stopping the drying process.
- the drying process according to the invention is applied to an enclosure 8.
- an enclosure is for example:
- an engine block comprising recesses defining enclosures retaining cutting lubricants after machining, cutting lubricants that must be removed by washing and drying before the engine block is used in the further manufacturing process of the engine ;
- a storage receptacle for radiation-emitting objects capable of radiolysing water of dihydrogen, which is an explosive compound from a certain concentration
- the drying plant of the invention comprises:
- a pump 7 connected to a control unit not shown here to constitute a means for extracting air from the enclosure 8,
- a main pipe having an end intended to be connected to the upper part of the enclosure 8 to communicate with the interior volume of the enclosure 8 and an opposite end connected to the inlet of the pump 7 by a valve 1 controlled by the control unit,
- a secondary pipe having an end intended to be connected to the lower part of the enclosure 8 to communicate with the interior volume of the enclosure 8 and an opposite end connected to the inlet of the pump 7 by a valve 3 controlled by the control unit,
- valve 2 for venting the main pipe, the valve 2 being controlled by the control unit,
- valve 4 for venting the secondary pipe, the valve 4 being controlled by the control unit
- a pressure sensor 9 intended to be mounted on the enclosure 8 and connected to the control unit.
- the control unit is a computer unit comprising a processor connected to a memory containing a computer program executable by the processor and arranged to implement the drying method according to the invention, once an operator has connected the interior volume. of the enclosure 8 to the main pipe, the secondary pipe and the sensor forming the air pressure measuring member in the enclosure 8.
- the drying process of the invention comprises the following subsequent steps (see Figure 2).
- the control unit firstly controls the pump 7 and the valves to extract the air from the chamber 8 via the main pipe and the secondary pipe until a pressure P2 is reached.
- the pump 7 draws air from the enclosure 8 via the main pipe and the secondary pipe.
- the suction via the secondary pipe also makes it possible to drive a portion of the liquid water that could accumulate in the lower part of the enclosure under the effect of gravity: it will advantageously be provided, on the secondary pipe, a water trap to prevent the water in question from being pumped to the pump 7.
- the control unit controls the pump 7 and the valves to initiate a repetition of pressure rise cycles up to a pressure P1 and a descent in the vicinity of the pressure. P2.
- This operation is carried out by regulating the pressure in the chamber by controlling the pump 7 and / or the valves.
- the pump 7 draws air from the enclosure 8 via the main pipe.
- the valve 4 is open, air is introduced into the chamber 8 via the secondary pipe.
- the introduction of air has two effects: it allows to raise the pressure in the enclosure but also to create in the chamber 8 a flow of air that will sweep the enclosure 8 and promote the evacuation of steam water through the main pipe.
- pressure P2 and the pressure P1 are within a range of evaporation of the water.
- the control unit then drives the pump 7 and the valves to interrupt the repetition and control said means for extracting air from the enclosure B until reaching a third pressure P3 adjacent to the triple point of the water.
- control unit controls the pump 7 and the valves to return the chamber 8 to the ambient pressure. An operator then disconnects the pressure sensor and the pipes from the enclosure 8.
- the control unit is arranged to interrupt the drying process when a desired humidity level is reached. This moisture content is not directly measured but evaluated according to the evolution of the pressure in the chamber 8. Several criteria for stopping the drying process are used.
- the method of the invention here comprises the step, during the air extraction, of measuring a time T2 necessary to reach the pressure P1 and of comparing the measured duration T2 with a duration of reference tsec needed to reach the first pressure for a desired moisture level in the enclosure.
- the repetition of the cycles is started if the measured duration T2 is greater than the reference duration tsec.
- the chamber 8 is directly returned to the ambient pressure if the measured duration T2 is less than or equal to the reference duration tsec: it is indeed not necessary to repeat the cycles in this case.
- control unit is arranged to interrupt the repetition of the cycles when the time eluted between two cycles is equal to a reference time Atsec corresponding to a desired humidity level in the chamber 8.
- the repetition is interrupted after the cycle 10.
- control unit is arranged to interrupt the repetition of the cycles when the times between several successive cycles are equal to each other.
- control unit is arranged to interrupt the repetition of the cycles when the slope of descent from pressure P1 to pressure P2 is identical to a reference slope corresponding to a desired humidity level in the enclosure.
- the repetition of the cycles is interrupted when the slope of descent from the pressure P1 to the pressure P2 is identical from one cycle to the other.
- the control unit is arranged to start a new repetition of the cycles when, during this rise in pressure from the third pressure P3, the pressure variation ⁇ after a determined duration is greater than the pressure variation APsec for a rate of pressure. desired humidity. If the pressure variation ⁇ after a determined duration is less than or equal to the variation of pressure ⁇ Psec, the control unit controls the pump 7 and the valves to return the chamber 8 to the ambient pressure and complete the process.
- Delivery of the enclosure at ambient pressure may be decided when several of the shutdown criteria are met.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15196344.4A EP3173720B1 (fr) | 2015-11-25 | 2015-11-25 | Procédé et installation de séchage d'enceinte sous vide |
| PCT/EP2016/078900 WO2017089588A1 (fr) | 2015-11-25 | 2016-11-25 | Procede et installation de sechage d'enceinte sous vide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3380799A1 true EP3380799A1 (fr) | 2018-10-03 |
Family
ID=54707575
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15196344.4A Active EP3173720B1 (fr) | 2015-11-25 | 2015-11-25 | Procédé et installation de séchage d'enceinte sous vide |
| EP16808941.5A Withdrawn EP3380799A1 (fr) | 2015-11-25 | 2016-11-25 | Procede et installation de sechage d'enceinte sous vide |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15196344.4A Active EP3173720B1 (fr) | 2015-11-25 | 2015-11-25 | Procédé et installation de séchage d'enceinte sous vide |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20180347902A1 (fr) |
| EP (2) | EP3173720B1 (fr) |
| JP (1) | JP2018538504A (fr) |
| RU (1) | RU2018122773A (fr) |
| WO (1) | WO2017089588A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7316323B2 (ja) * | 2021-06-30 | 2023-07-27 | 株式会社Screenホールディングス | 減圧乾燥装置および減圧乾燥方法 |
| CN113915956A (zh) * | 2021-10-13 | 2022-01-11 | 大冶市兴进铝业有限公司 | 一种型材干燥装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555191Y2 (fr) * | 1975-04-02 | 1980-12-20 | ||
| KR100512079B1 (ko) * | 2000-05-19 | 2005-09-05 | 최 선 태 | 목재 건조 방법과 그 장치 |
| JP5064119B2 (ja) * | 2007-06-07 | 2012-10-31 | 東京エレクトロン株式会社 | 真空引き方法及び記憶媒体 |
| FR2920046A1 (fr) * | 2007-08-13 | 2009-02-20 | Alcatel Lucent Sas | Procede de post-traitement d'un support de transport pour le convoyage et le stockage atmospherique de substrats semi-conducteurs, et station de post-traitement pour la mise en oeuvre d'un tel procede |
| US8230616B2 (en) * | 2009-06-11 | 2012-07-31 | Sterilucent, Inc. | Apparatus and method for drying and sterilizing objects in a load |
| JP5927066B2 (ja) * | 2012-07-05 | 2016-05-25 | 株式会社協真エンジニアリング | 乾燥装置及び乾燥方法 |
-
2015
- 2015-11-25 EP EP15196344.4A patent/EP3173720B1/fr active Active
-
2016
- 2016-11-25 US US15/778,650 patent/US20180347902A1/en not_active Abandoned
- 2016-11-25 EP EP16808941.5A patent/EP3380799A1/fr not_active Withdrawn
- 2016-11-25 JP JP2018526899A patent/JP2018538504A/ja not_active Ceased
- 2016-11-25 WO PCT/EP2016/078900 patent/WO2017089588A1/fr not_active Ceased
- 2016-11-25 RU RU2018122773A patent/RU2018122773A/ru not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018538504A (ja) | 2018-12-27 |
| EP3173720B1 (fr) | 2019-03-13 |
| US20180347902A1 (en) | 2018-12-06 |
| RU2018122773A (ru) | 2019-12-25 |
| WO2017089588A1 (fr) | 2017-06-01 |
| EP3173720A1 (fr) | 2017-05-31 |
| RU2018122773A3 (fr) | 2019-12-25 |
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