GB2056694A - Test chamber for simulating climatic parameters - Google Patents
Test chamber for simulating climatic parameters Download PDFInfo
- Publication number
- GB2056694A GB2056694A GB8009911A GB8009911A GB2056694A GB 2056694 A GB2056694 A GB 2056694A GB 8009911 A GB8009911 A GB 8009911A GB 8009911 A GB8009911 A GB 8009911A GB 2056694 A GB2056694 A GB 2056694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- working chamber
- temperature
- door
- shaped baffle
- container
- 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- Withdrawn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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
A test chamber for simulating climatic states of temperature and humidity and having two separate circulations for a temperature adjusting gas comprises, a substantially U-shaped baffle (5), arranged between a thermally insulated outer container (1) having a door 3, and three walls of a five-sided inner container (4), the edges of said baffle (5) being in contact with the inner wall of the outer container (1) and also with the door frame (2), said baffle being provided with a fan (7) in an opening (6) and with a perforate base (8) divided by a deflector (9). A working chamber (10) also provided with a door (12) is surrounded by said inner container (4), and both the working chamber (10) and the inner container (4) are fixed to the door frame (11). A fan (15) provides for temperature adjustment of the gas circulating internally of the U-shaped baffle, and the opposite face (17) of the working chamber (10) is perforate. A swivelling angle flap (19) connects the two separate circulations. <IMAGE>
Description
SPECIFICATION
Test chamber for simulating climatic parameters
The present invention relates to a test chamber for simulating climatic parameters and more particularly relates to a test chamber for simulating extremes of the climatic parameters temperature and humidity which has a wide working range and a high precision.
Climate, with air temperature and air humidity being the main components thereof, has a special importance in the complex Cities of possible environmental influences. Test chambers for simuiating an environment are therefore normally used to produce a climate from these two main components in the working chamber. At a constant water vapour content, the relative humidity of air is a parameter which is dependent upon the air temperature. To produce a certain desired air temperature in a test chamber, different temperature-adjusting systems have been used. The selection of which system to use is determined by the required climatic parameters, that is, temperature range, constancy of temperature, maximum obtainable air humidity, rate of change of the temperature and also by economics and engineering effort.In the systems involving directly adjusting the air temperature, a vaporiser and a heating element are located in a working chamber in a screened arrangement and, with respect to energy, are directly connected to the working chamber via a circulating air stream. The actual system of adjusting the temperature of the working chamber jacket is characterised by largearea vaporisers and also heating elements which are located on the outside of the working chamber, and the energy flux takes place through the wall of the working chamber. Indirect temperature adjustment via a liquid is another system which may be used.In this case, a liquid, the temperature of which is adjusted externally of the chamber, is conveyed through channels in the wall of the working chamber orthrough a heat exchanger which can generally be equated with the vaporiser in direct air temperature adjustment systems. In Czechoslovakian Patent No.
96,808, there is described an indirect air temperature adjustment system using two mutually separate air circulations, one circulation being for the adjustment of the temperature of the working chamber and the second circulation being for adjustment of the water vapour content of the air in the working chamber.
For the purposes of thins particular system, a working chamber is insertedin an outer container, the temperature of which is directly adjusted, and which has a vaporiser and heating element, and the air at the adjusted temperature flows around the working chamber in a single circulation of five sides - without a door side. The air having a variable water vapour content is fed to the working chamber from the outside by the aforementioned second circulation and, in a simple manner, is set in turbulent motion by a fan.A combination of direct and indirect air temperature adjustment, for example in cabinets for the testing of noxious gases and in plant frames for carrying out experiments on plants, having a circulation for indirectly adjusting the temperature of the working chamber and also a part stream, branched off from the former, for direct temperature adjustment is also known. In this case, a a working chamber which has its own door is inserted into the outer container, the temperature of which is directly adjusted. Air, the temperature of which has been adjusted and which has been humidified or dehumidified at the same time, flows round all sides of the working chamber. A part of the conditioned air of the outer circulation is passed into the working chamber and flows through the latter, and the air here is set in turbulent motion in a simple manner, and discharged to the outside.
The known temperature adjustment systems have the disadvantage that, using the particular temperature adjustment system selected, stringent demands on constancy and high humidities can only be met within a limited range of air temperature and air humidity, high rates of change cannot be obtained, and reproducible climatic parameters, selected at random in the broad temperature range of from minus 100'Cto about 180-C, with a high constancy and a high rate of change, including a humidity of about 98% at max. = 80cm, can only be realised with great difficulty and a great engineering!economic effort.Direct air temperature adjustment and direct adjustment of the temperature of the test chamber jacket are simple to achieve, but they meet only limited demands with regard to constancy of temperature, including a uniform temperature distribution in the working chamber and achievable high humidities. This is so in particular because, with a "cool" control command, constancy of temperature with time together with a local temperature distribution to a mean value of +0.5 K is not achievable.
Additionally, the temperature difference, which depends on heat transfer, between the mean air temperature and the lowest face temperature of the vaporiser, or the temperature of the test chamber jacket, which temperature difference is always > 1.0
K during the cooling command does not allow stable humidities of about 97% and more to be achieved.
This is because of the limited scope for adapting the energy of the cooling performance of the refrigerant compressor including the vaporiser to the required cooling performance at the particular test chamber temperature within the conditioned range. Good values of temperature constancy, high humidity and uniform temperature distribution are obtained with indirect temperature adjustment of a liquid. The high heat capacity of the temperature adjustment liquid however, has an adverse effect on the rate of change of the temperature, which rate is on average smaller than in the case of test chambers with directly adjusted temperature. Due to the limits of applicability of the temperature adjustment liquid, the temperature range is limited and extends from minus 30 degrees centigrade up to plus 100 degrees centigrade.
The aforementioned design having two air circulations separated from one another improves the quality of the parameters of the temperature difference and the achievement of a high humidity in the working chamber, as compared with the tempera ture adjustment systems which comprise direct air temperature adjustment and adjustment of the temperature of the working chamber jacket. Compared with indirect temperature adjustment using a liquid, this system possesses a lower heat capacity and thus makes higher rates of change possible at the same energy input.The improvement of the quality of the parameters, with regard to reducing the temperature difference and reaching a high humidity, is achieved because disturbing influences on the working chamber - in particular due to heat leaking in, to the cooling action of the vaporiser and to the temperature-controlled air stream circulating around the working chamber- are diminished in conjunction with the thermal damping behaviour of the working chamber.Since, however, the temperature- controlled air stream circulating round the working chamber, together with the walls of the working chamber, represent a series arrangement in heat exchange, the individual walls have different mean temperatures which mean tem-peratures, in the case of relatively large temperature differences between the temperature in the working chamber and the outside-temperature, can move relatively far apart.
Extreme climatic parameters within the wide tem
perature range of up to 580 degrees centigrade, coupled atthe sametimewith a small temperature difference in the working chamber of plus or minus 0.15 degree centigrade, can therefore-not be
achieved.In addition, since the rate of change of temperature in the working chamber depends upon two parameters, namely heat capacity and heat transition, butthe known test chamber designs do
not affect a change in the heat transition under
different operating states of heating or cooling and control via-the set value, an excessive temperaturegradient between the outer container and the work
ing cham-ber, in particular the inserts thereof, isestablished on heating or cooling This-results in a
long adaptation time to achieve the desired temperature value, and is thus disadvantageous with regard to economy of time and energy.
It is.the aim ofthe present invention to provide a test chamber for simulating climatic parameters which generates, and-maintains within a very short time and with economical use of energy extreme climatic parameters.in a temperature range-of from minus 1 OD degrees centigrade to plus 180 degrees centigrade--and a relative air humidity of up to 97% and-morein a temperature range of from minus 30 degrees centigrade up to plus 80 degrees centigrade, together with a temperature difference per unit time of 0.1 degree centigrade.
It is the object of the present invention to vary the flow of thetemperatu re-adjusting medium~in the test
chamber around and also in the working chamber in
such a:manner that the quality of the parameters;
mentioned under the stated aim, of the-climatic
components can be achieved economically.
In the present invention, the object is achieved
when two separate circulations for the gaseous
temperature-adjusting medium, which is preferably air,- are'provided-in-an-outerand an innercirculation, each with directional guiding means, not hitherto
used, and the two circulations can be connected to one another.
Accordingly, the present invention provides a test chamber for simulating the climatic parameters temperature and humidity having two separate circulations for a gaseous temperature-adjusting medium which comprises a substantially U-shaped baffle arranged between a thermally insulated outer container having a frame with a door and three walls of a five-sided inner container, at a distance from both the outer and the inner eontainers, the edges of said U-shaped baffle being in contact with the two side faces of the inner wall of the outer container and also with the frame for the outer container door, said
U-shaped baffle being provided with a fan for temperature adjustment medium circulation exter nal of the U-shaped baffle in an opening in one face thereof, the opposite face of the U-shaped baffle
being perfdrate and divided by a deflection baffle; a working chamber having a frame with door, and
being surrounded at a distance on five faces by said
inner container and both the working chamber and the inner container being fixed to the frame of the working chamber door, the working chamber door
and the door of the outer container corresponding to
each other but being at a- distance-from each other,
one face of the inner wall of the working chamber
being provided with a-fan for temperature adjust
ment medium cirulation-internal ofthe U-shaped
baffle in an dpening in one face thereof, the external
and internal circulation fans being mounted on a
common shaft, the opposite face of the working
chamber being perforate; and a swivelling angle flap
mounted parallel to the deflection baffle of the inner
container for enabling a desired connection of the
two separate circulations.
Between the thermally insulated outer container
and three of the walls of the inner container, there-is,
on three sides and atadistancefrom both, a
U-shaped baffle which thereby forms two chambers.
These two chambers are connected to one another
as an outer circulation, an opening with a fan being arranged in one face of the-separating baffle and the
opposite face of the baffle being perforate. This
perforate face is divided by a deflection baffle.
Refrigerant vaporisers and electrical heating ele
ments are arranged as energy carriers in the space
between the outer container and the baffle, and the
inner container surrounds the working chamber on five sides. The two chambers thus formed are
connected to one another as the~inner circulation, an
opening with a fan being arranged in one face of the
working chamber and the opposite face of the
working chamber being perforate. The fans forthe
outer and inner circulations are normally located on
a common shaft driven by a motor. As a further
innovation, a swivelling angle flap is provided in the
wall of the inner container, which separates the two
aforementioned circulations, on an edge of and as part of th s wall.
In the outer circulation, the gaseous temperature
adjusting medium, which is preferably air, is cooled
by means of refrigerant vaporisers or heated by
heating elements. The fan moves the temperature
adjusting medium, the flow of which is divided by
the deflection baffle, through the perforate baffle and a uniform split stream parallel on all sides, flows, around the walls of the inner container and the inner door. The result of the design of the outer circulation according to the present invention is that the gaseous temperature-adjusting medium flows around the inner contaner having the inner door only after the control fluctuations have been damped, whereby energy exchange on all sides takes place via the walls together with a similar gaseous temperature-adjusting medium for the inner circulation.The fan moves the temperatureadjusting medium in the inner circulation through the opening of the working chamber, and the medium flows around five sides of the working chamber and through the perforate surface thereof.
A directional flow of low velocity is formed in the working chamber. The arrangement, according to the present invention, of the outer circulation and the inner circulation guides the separated streams of the temperature-adjusting medium in countercurrent manner past each other along the walls of the inner container whilst separating them.
The design of the temperature adjustment means according to the invention makes it possible to adapt the functional effect thereof to the required mode of operation, that is to say, within a temperature range of from about minus 100 C up to about 180"C. The effects of the energy pulses of the energy carriers are filtered out by the series arrangement of several heat resistances plus heat capacitances, such as are represented by the five-sided jacket including the frame and the door of the outer chamber and the elements of the air baffle device and by the working chamber including with its own air baffle device, under the influence of air as the flowing temperature-adjusting medium, and are converted into a uniformly flowing quantity of heat to such an extent that a temperature constancy of < +0.1 K is achieved in the centre of fhe working chamber. The heat resistances are also reduced due to variation of the airflow by means of the flap control, and a high rate of temperature change thus becomes possible.
Furthermore, since temperature-control led air flows around the whole of the working chamber, the working chamber is completely screened from the disturbing influences of heat leaking in and of heat losses due to the temperature difference between the external temperature and the temperature of the working chamber, which temperature difference can assume high values if the temperature range present is extremely large. Since no energy carriers are located in the working chamber - the walls represent the heat exchange surfaces - the air flow circulates in the working chamber with a low pressure drop and thus requires only a small fan power.In this way, the quantity of heat introduced by the fan becomes small and, in conjunction with the working chamber which is screened from external disturbing influences, the temperature difference between the mean air temperature in the working chamber and the wall temperature of the working chamber becomes so small that an upper limiting humidity of 98% relative humidity is reached in a span of temperature range of 1 0 K as a part range of the total temperature range. This also includes the small quantity of heat which is introduced into the working chamber by the humid air which can be metered in for humidification.Within the said part range, the screening of the working chamber at the same time effects a slight local deviation of any desired temperature point by 4+0.2 K, relative to the temperature in the centre of the working chamber.
The full effect of the heat resistances plus heat capacitances is obtained as a result of the working chamber having more or less point contact only with the outer chamber, or else the heat resistance due to heat conduction being greater than the heat resistance due to heat transfer via the air as the temperature-adjusting medium. This is also a contribution to the total result. Although the temperature-adjusting device used in the present invention has even higher quality parameters than devices which have temperature adjustment by use of a liquid, the overall capacity of the former is at most 1/3 of the heat capacity of the latter. The energy demand is likewise reduced to 1/3 at the same rate of change of temperature.The two operating stages, that is to say heating/cooling on the one hand and control at the set value of the temperature on the other hand, require an effective thermodynamic adaptation for an optimum mode of operation - in particularwhen the rates of change are high. This is achieved by separating or connecting the outer and the inner circulations of temperature-adjusting medium, depending on the operating state, by means of a swivelling angle flap which is automatically controlled, preferably electro-magnetically.The control command is derived by the temperature controller which, at an adjustable distance from the set value, emits an initial-signal and then immediately changes the angle flap, the flap thereby being closed, and also changes the large heating/cooling power for the high rate of change over to control via the set value with a smaller heating/cooling power. When the rate of change of the temperature is high, the air stream, divided by the deflection baffle in the outer circulation is passed via the opened angle flap as a part stream into the inner container with the working chamber and, after flowing through the latter is recombined with the part stream of the outer circulation.The reduction of the heat resistance which is thus effected, similarly reduces the temperature gradient between the outer and inner containers on heating/cooling and the selected set value is reached more rapidly. In this way, the thermodynamic adaptation to the operating state is achieved.
Functionally, the following are coupled with the automatic change-over: - a high heating/cooling power with opened angle flap for a high rate of change - a lower heating/cooling power with closed angle flap for temperature control via the set value.
The present invention will now be further illustrated with reference to the accompanying drawings in which:
Figure 1 is a cross-sectional view of a preferred test chamber of the present invention looking from the front and
Figure 2 is a cross-sectioned view of the chamber shown in Figure 1 looking from the side.
Referring to Figures 1 and 2, the outer container 1 which is thermally insulated on five sides has, on the
operating side thereof, a frame 2 and a tightlyclosing, thermally insulated outer door 3. Inside this outer container 1, there is an inner container 4, separated therefrom at a distance on all sides, and in the inner container 4 there is a working chamber of the inner container. On one side the inner container 4 and the working chamber 10 are fixed to a common frame 11, and at this frame 11, the working chamber 10 is tightly closed by a door 12 which corresponds to the outer door 3.
Between the wall of the container 1 and the wall of the inner container 4, and at a distance from three faces of the inner container 4, a U-shaped baffle 5 is located, the edges of which are positively fixed to the frame 2 and also to the two side faces of the inner wall of the container 1.
In the outer chamber 20 formed between the container 1 and the baffle 5, there are located refrigerant vaporisers 23 and electrical heating elements 24. In one face ofthe baffle 5 is located an opening 6 having a fan 7 and the opposite face 8 thereof is perforate, that is to say provided with a number of openings. This perforate face 8 is divided by a deflection baffle 9. The inner container 4 encloses the working chamber 10 on five sides, and on the operating side thereof, there is the working chamber door 12. In one face of the wall ofthe working chamber 10, there is an opening 14with a fan 15, and the opposite face 17 of the working chamber 10 is provided with a number of openings.
The fans 7 and 15 are located on a common shaft 16 which is driven buy a motor. Fixing of the container 4 and the working chamber 10 is effected by means of bolts 28 which are fastened in the side walls thereof and also on the rail 27 on the outside. The bolts 28 are made from a material of low heat conductivity.
The rail 27 is supported on bearing bolts 29 fixed in the container 1. The chamber which is defined by the container 1 having the frame 2 and the door 3, and by the container 4 with the frame 11 and the working chamber door 12, and which is divided by the
U-shaped baffles, forms the outer circuit for the temperature-adjusting medium air. The temperature-adjusting medium, which is cooled or heated by the vapourisers 23 or heating element 24 respectively and which are controlled in known manner, is passed by the fan 7 around the baffle 5 and, in counter-current, around the container 4 along the inside of the baffle.The container 4 with the frame 11 and the working chamber door 12 define the inner circulation ofthetemperature-adjusting medium, dry or humid air being supplied from the outside of the test chamber ofthe present invention, in known manner through the air inlet 25 to the inner circulation. The fan 15 moves this air through the working chamber 10 and in a counter-current direction around the working chamber on five sides. The opening in the wall ofthe container 4 for the shaft 16 is a floating mounting and is greaterthan the shaft diameter thereby forming an annular gap 30. A part of the air of the inner circulation escapes through this annular gap 30 into the outer circulation and from there through the air outlet 26 to the outside.
On the edge 18, there is located a swivelling angle
flap 19 which, as part of the container, makes tight
contact with its outer surface parts on the wall of the
container. When the angle flap 19 is swivelled by
means of the swivel device 22, it frees an opening
between the outer and the inner circulations. This
state of operation makes it possible to obtain a high
rate of change of temperature in the working
chamber, as required.
In the drawings, the arrows with black heads
indicate the outer circulation, the arrows with white
heads indicate the inner circulation and the arrows with part black and part white heads indicate
humid/dry air and also waste air.
Claims (6)
1. A test chamber for simulating the climatic
parameters temperature and humidity having two separate circulations for a gaseous temperatureadjusting medium which comprises a substantially
U-shaped baffle arranged between a thermally insu
lated outer container having a frame with a door and three walls of a five-sided inner container, at a distance from both the outer and the inner containers, the edges of said U-shaped baffle being in contact with the two side faces of the inner wall of the outer container and also with the frame for the outer container door, said U-shaped baffle being provided with a fan for temperature adjustment
medium circulation external ofthe U-shaped baffle in an opening in one face thereof, the opposite face of the U-shaped baffle being perforate and divided by a deflection baffle; a working chamber having a frame with a door, and being surrounded at a distance on five faces by said inner container and both the working chamber and the inner container being fixed to the frame of the working chamber door, the working chamber door and the door of the outer container corresponding to each other but being art a distance from each other, one face of the inner wall of the working chamber being provided with a fan for temperature adjustment medium circulation internal ofthe U-shaped baffle in an opening in one face thereof, the external and internal circulation fans being mounted on a common shaft, the opposite face of the working chamber being perforate; and a swivelling angle flap mounted parallel to the deflection baffle of the inner container for enabling a desired connection of the two separate circulations.
2. A test chamber is claimed in claim 1 wherein the swivelling angle flap is automatically controlled.
3. A test chamber as claimed in claim 2 wherein the angle flap is controlled electromagnetically.
4. A test chamber as claimed in any of claims 1 to 3 wherein at least one refrigerant vaporiser is provided between the outer container and the substantially U-shaped baffle.
5. A test chamber as claimed in any of claims 1 to 4 wherein at least one heating element is provided between the outer container and the substantially
U-shaped baffle.
6. A test chamber as claimed in claim 1 substantially as herein described with reference to and as shown in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD21190079A DD141706A1 (en) | 1979-03-30 | 1979-03-30 | CHECK FOR THE SIMULATION OF CLIMATE PARAMETERS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2056694A true GB2056694A (en) | 1981-03-18 |
Family
ID=5517418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8009911A Withdrawn GB2056694A (en) | 1979-03-30 | 1980-03-24 | Test chamber for simulating climatic parameters |
Country Status (5)
| Country | Link |
|---|---|
| DD (1) | DD141706A1 (en) |
| DE (1) | DE2947829A1 (en) |
| FR (1) | FR2452677A1 (en) |
| GB (1) | GB2056694A (en) |
| SU (1) | SU1386806A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5123477A (en) * | 1989-05-02 | 1992-06-23 | Unisys Corporation | Thermal reactor for biotechnological processes |
| US5139079A (en) * | 1990-07-26 | 1992-08-18 | General Electric Company | Dynamic mechanical analyzer having improved heat transfer |
| US5211713A (en) * | 1990-11-30 | 1993-05-18 | Tabai Espec Corp. | Temperature control method with simultaneous heating and cooling near the set-point |
| US5692556A (en) * | 1994-01-14 | 1997-12-02 | Hafner; Erich | Precision temperature test chamber |
| GB2337814A (en) * | 1998-05-29 | 1999-12-01 | Roberts And Roberts Senior Lim | Variation simulator for testing air conditioning plant control systems |
| EP2381239A2 (en) | 2010-04-22 | 2011-10-26 | WEISS UMWELTTECHNIK GmbH | Corrosion inspection device |
| CN102728416A (en) * | 2012-06-18 | 2012-10-17 | 中国人民解放军第二军医大学 | Simulation system for high temperature and high humidity environment of tropics |
| CN105115863A (en) * | 2015-09-14 | 2015-12-02 | 国家电网公司 | Phytotron haze environment simulating device and haze environment simulating method thereof |
| CN112206837A (en) * | 2020-10-19 | 2021-01-12 | 江苏拓米洛环境试验设备有限公司 | Test box |
| CN113457751A (en) * | 2021-07-20 | 2021-10-01 | 山东宏葵医学检验实验室股份有限公司 | Safety management cabinet for chemical reagents in medical laboratory |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3825054A1 (en) * | 1988-07-23 | 1990-01-25 | Hans Juergen Philipp | Container for storing slides and the like |
| DE3914585C2 (en) * | 1989-05-03 | 1999-02-11 | Forsch Prof Dr Ing Habil Dr Ph | Method and device for determining the corrosive effect of process gases, in particular industrial gases, on surfaces of material samples |
| DE3928130C2 (en) * | 1989-08-25 | 1998-01-08 | Max Prof Dr Rer Nat Dr Setzer | Method and arrangement for testing the frost-thaw resistance and / or the frost-thaw salt resistance of a solid |
| DE3928360A1 (en) * | 1989-08-28 | 1991-03-14 | Bundesrep Deutschland | Testing plastics at high temperature - by placing in heated autoclave, injecting water for desired humidity, reheating, testing specimen and weighing |
| DE19817372C1 (en) * | 1998-04-18 | 1999-10-07 | Binder Peter Michael | Climate-controlled laboratory cupboard has two de-humidifier evaporators useful e.g. in environmental simulation, materials testing, stability and shelf life tests for food and especially active ingredients in pharmaceutical products |
| DE19915906C2 (en) * | 1999-04-08 | 2001-03-22 | Vlm Gmbh Innovative Korrosions | Corrosion test device |
| DE10155245B4 (en) * | 2001-11-09 | 2004-12-09 | Audi Ag | Facility for simulating weather conditions |
| DE10304011A1 (en) * | 2003-02-01 | 2004-08-05 | Kendro Laboratory Products Gmbh | Climate control system has defrosting system with gas circulation path blocking to prevent frosting in user area |
| DE102014116504A1 (en) | 2014-11-12 | 2016-05-12 | Karlsruher Institut für Technologie | Device for generating climatic input conditions for air conditioning devices |
| DE102014118787A1 (en) * | 2014-12-16 | 2016-06-16 | Binder Gmbh | simulation chamber |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD103959A1 (en) * | 1973-05-25 | 1974-02-12 | ||
| DE2721862C3 (en) * | 1977-05-14 | 1980-03-06 | Heraus Voetsch Gmbh | Climatic chamber |
-
1979
- 1979-03-30 DD DD21190079A patent/DD141706A1/en not_active IP Right Cessation
- 1979-11-28 DE DE19792947829 patent/DE2947829A1/en not_active Withdrawn
- 1979-12-28 FR FR7932021A patent/FR2452677A1/en active Pending
-
1980
- 1980-02-12 SU SU807771080A patent/SU1386806A1/en active
- 1980-03-24 GB GB8009911A patent/GB2056694A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5123477A (en) * | 1989-05-02 | 1992-06-23 | Unisys Corporation | Thermal reactor for biotechnological processes |
| US5139079A (en) * | 1990-07-26 | 1992-08-18 | General Electric Company | Dynamic mechanical analyzer having improved heat transfer |
| US5211713A (en) * | 1990-11-30 | 1993-05-18 | Tabai Espec Corp. | Temperature control method with simultaneous heating and cooling near the set-point |
| US5692556A (en) * | 1994-01-14 | 1997-12-02 | Hafner; Erich | Precision temperature test chamber |
| GB2337814A (en) * | 1998-05-29 | 1999-12-01 | Roberts And Roberts Senior Lim | Variation simulator for testing air conditioning plant control systems |
| GB2337814B (en) * | 1998-05-29 | 2001-06-20 | Roberts And Roberts Senior Ltd | Variation simulator for testing air conditioning plant control systems |
| EP2381239A2 (en) | 2010-04-22 | 2011-10-26 | WEISS UMWELTTECHNIK GmbH | Corrosion inspection device |
| EP2381239A3 (en) * | 2010-04-22 | 2011-12-28 | WEISS UMWELTTECHNIK GmbH | Corrosion inspection device |
| CN102728416A (en) * | 2012-06-18 | 2012-10-17 | 中国人民解放军第二军医大学 | Simulation system for high temperature and high humidity environment of tropics |
| CN105115863A (en) * | 2015-09-14 | 2015-12-02 | 国家电网公司 | Phytotron haze environment simulating device and haze environment simulating method thereof |
| CN112206837A (en) * | 2020-10-19 | 2021-01-12 | 江苏拓米洛环境试验设备有限公司 | Test box |
| CN113457751A (en) * | 2021-07-20 | 2021-10-01 | 山东宏葵医学检验实验室股份有限公司 | Safety management cabinet for chemical reagents in medical laboratory |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2947829A1 (en) | 1980-10-09 |
| DD141706A1 (en) | 1980-05-14 |
| SU1386806A1 (en) | 1988-04-07 |
| FR2452677A1 (en) | 1980-10-24 |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |