EP3439775B1 - Agitateur magnétique - Google Patents

Agitateur magnétique Download PDF

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Publication number
EP3439775B1
EP3439775B1 EP17721358.4A EP17721358A EP3439775B1 EP 3439775 B1 EP3439775 B1 EP 3439775B1 EP 17721358 A EP17721358 A EP 17721358A EP 3439775 B1 EP3439775 B1 EP 3439775B1
Authority
EP
European Patent Office
Prior art keywords
state
display
heating
magnetic stirrer
placement surface
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.)
Active
Application number
EP17721358.4A
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German (de)
English (en)
Other versions
EP3439775A1 (fr
EP3439775C0 (fr
Inventor
Roman DIL
Sergiy Rubinshteyn
Michael MOSKALENKO
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.)
Hans Heidolph GmbH and Co KG
Original Assignee
Hans Heidolph GmbH and Co KG
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Publication date
Application filed by Hans Heidolph GmbH and Co KG filed Critical Hans Heidolph GmbH and Co KG
Publication of EP3439775A1 publication Critical patent/EP3439775A1/fr
Application granted granted Critical
Publication of EP3439775B1 publication Critical patent/EP3439775B1/fr
Publication of EP3439775C0 publication Critical patent/EP3439775C0/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating

Definitions

  • the present invention relates to a magnetic stirrer with a magnetic drive and a support surface for a laboratory vessel with a substance to be stirred according to the preamble of claim 1.
  • a magnetic stirrer is from the document US 2005/0183582 A1 known.
  • a hob with a plate-shaped molded body made of brittle material is also known, which has a light-optical residual heat indicator for the cooking zone, which can be switched on after a heating element has been switched off to a flashing signal from a flasher.
  • Such a magnetic stirrer is a typical laboratory device and is used to stir substances in a wide variety of laboratory applications.
  • the substances to be stirred can on the one hand be aggressive, for example caustic or corrosive, substances which could damage components of the stirrer, or on the other hand can be substances which in turn can react sensitively to foreign substances are to be protected from contamination for some other reason, it is advantageous if there is a possibility of separating the place of stirring from the stirrer, so to speak, in particular to provide it outside of the stirrer.
  • the magnetic drive of the magnetic stirrer is designed to generate a magnetic field that changes in such a way that a magnetic stirring element, which can be placed directly into the laboratory vessel with the substance to be stirred, can be driven to a stirring movement in order to to stir the substance. Since the substance is contained in the laboratory vessel, which comprises, for example, glass or plastic as a material, direct contact of the substance with the stirrer can be avoided.
  • the magnetic stirring element which is separate from the stirrer and is designed in particular as a magnetic rod with a protective coating that is preferably particularly inert and comprises, for example, polytetrafluoroethylene, (so-called stirring rod) is directly introduced into the substance to be stirred and can then be driven to a stirring movement by the magnetic field generated by the magnetic drive across the outer wall of the laboratory vessel.
  • the magnetic drive is preferably adjustable, i.e. at least can be switched on and off. However, the magnetic drive can preferably also be adjusted beyond this. In particular, the magnetic drive can also be adjustable with regard to the speed of the changing magnetic field and thus to the speed of the resulting stirring movement of the magnetic stirring element.
  • a respective laboratory device can include a heating device.
  • a magnetic stirrer can further comprise a, in particular adjustable, heating device which is designed to heat the support surface in order to heat the substance arranged on the support surface.
  • the magnetic drive and the heating device of the magnetic stirrer are preferably adjustable separately from one another, whereby the adjustability of the heating device, similar to the adjustability of the magnetic drive, can basically be limited to the possibility of switching the heating device on and off.
  • a substance arranged on the installation surface can either be stirred, heated or stirred and heated at the same time.
  • the heating device is variably adjustable beyond simply switching it on and off.
  • a heating output of the heating device can be adjustable.
  • the adjustability of the magnetic drive and/or the heating device can be limited to a respective value range, whereby the adjustment can include continuous and/or stepped adjustment.
  • the footprint of the magnetic drive represents that section of the magnetic stirrer on which a respective substance is arranged for stirring and/or heating.
  • the installation surface is preferably aligned horizontally, so that the substance, in particular a laboratory vessel containing the substance, can easily be placed on the installation surface.
  • the magnetic driving of the respective magnetic stirring element can take place essentially through the installation surface.
  • the substance can be heated by the fact that the installation surface, which is heated by the heating device, transfers heat to the substance, in particular via the laboratory vessel.
  • the installation surface When heated, the installation surface can become warm and possibly so hot that touching the installation surface can cause pain or burns. As a rule, it is not possible to see what temperature the installation surface itself is currently at.
  • a laboratory device such as a magnetic stirrer, which is not used exclusively for heating, but is often used without a heating function only as part of its basic functionality, i.e. for stirring, for example, there is this Risk of painful burns if, for example, a user does not expect that a surface of the laboratory device could be hot.
  • the object is achieved by a magnetic stirrer with the features of claim 1 and in particular in that the magnetic stirrer comprises a display device which is designed to display a respective temperature state of the installation surface.
  • the display device can therefore be used to visually identify the temperature condition of the installation area.
  • at least two temperature states of the installation area must be distinguished.
  • the two states are in particular a hot state in which the installation surface has a temperature in a range in which touching the installation surface should be avoided, since the contact can, for example, be perceived as unpleasant or painful or even be harmful to health, and a cooling state in which the installation surface has a temperature in a range in which touching the installation surface is not critical.
  • the respective temperature ranges of the temperature states distinguished by the display device can connect seamlessly to one another and can each be separated by a predetermined or predeterminable temperature threshold value.
  • the footprint of the magnetic stirrer can be used for Each temperature can be assigned a respective temperature state, which can then be identified by the display device.
  • the respective temperature of the installation area can be indicated in different fine degrees.
  • a displayed temperature state is correlated in particular with the temperature of the installation surface, but fundamentally independent of a heating state of the heating device. This is because the display device should advantageously be able to warn of the actual risk of burning, particularly even when the heating device is already switched off. Conversely, it can be advantageous if the display device also shows how long the installation surface can still be safely touched when the heating device is already heating.
  • the display device is further designed to display a respective heating state of the heating device.
  • the magnetic stirrer could in principle comprise a further display device.
  • a respective temperature state of the installation surface and a respective heating state of the heating device are displayed by the same display device.
  • the display device can thus be designed to be particularly compact and fewer components are required for the magnetic stirrer.
  • the display device can fundamentally display respective temperature states of the installation surface and respective heating states of the heating device spatially and/or temporally separated from one another. According to the invention, however, the display of respective temperature states and respective heating states is combined, i.e. in particular at least overlapping in space and time. According to the invention, various combinations of a respective temperature state and a respective heating state is indicated by different optical signals, so that conclusions can be drawn from a single signal both about the respective temperature state of the installation surface and about the respective heating state of the heating device.
  • the currently existing temperature state and the currently existing heating state are referred to as the "respective" temperature state or the “respective” heating state.
  • Displaying a respective temperature state can basically be done in many different ways.
  • different states can be represented by different symbols, one or more of which can be displayed by the display device.
  • the display device can, for example, comprise a screen-like display panel, such as an LCD or TFT screen.
  • a hot condition can be represented, for example, by a warning symbol.
  • different temperature states are represented by incremental symbols, such as a different number of lines or bars of different lengths, according to their respective temperature range.
  • the display device comprises a lighting element that can be controlled to emit light and is designed to control the lighting element for emitting light with different lighting characteristics in order to display different temperature states of the installation surface and/or different heating states of the heating device.
  • Several different temperature states and possibly several Different heating states can be indicated by emitting a specific lighting characteristic from the same lighting element.
  • the lighting element can be, for example, a signal light, such as a lamp.
  • the lighting element can also include a lighting surface, which can in particular be backlit by a light source.
  • a luminous surface can then have a shape that can be selected with a view to good visibility and/or a pleasing design.
  • a symbol can also be represented by the shape of a luminous surface of the luminous element, for example by the luminous surface being shaped in the manner of a warning triangle and/or flickering flames to warn of a hot installation surface.
  • the lighting element can be used as the light source of the lighting element. Due to the low power requirement and the low heat radiation, at least one LED is preferably provided. However, the lighting element can in particular also include a different type of electroluminescent element as a light source.
  • several different respective temperature states of the installation surface can preferably be displayed by the same lighting element, so that the temperature states cannot be distinguished based on different lighting elements. Instead, they can be identified based on various lighting characteristics emitted by the lighting element.
  • the lighting characteristic refers to a type of light emission by the lighting element that is specific to a respective state.
  • Respective lighting characteristics for displaying different temperature states of the installation surface can differ in particular with regard to the respective duration, pulse frequency, pulse duration, pulse pause duration, pulse sequence, spatial extent, color and/or brightness of the emitted light.
  • a temperature condition corresponding to a high temperature may be indicated by brighter light than a temperature condition corresponding to a lower temperature.
  • a temperature condition can be indicated by a specific color of the emitted light, whereby, for example, a gradient from green to yellow and orange to red can correspond to increasingly higher temperatures of the installation surface and vice versa.
  • the light does not need to be emitted continuously, but can be pulsed differently depending on the status to be displayed. This makes it possible in principle to encode a large number of different states using a different pulse sequence, for example in the manner of Morse code.
  • temporal patterns with low complexity are preferable.
  • pulsating or pulsed emission of light means a regular increase and decrease in the intensity of the emitted light. In particular, the intensity drops to zero between two pulses.
  • the transition between maximum and minimum intensity can be abrupt in the manner of a step function (which can then correspond to a flashing) or continuous, for example in the manner of a triangular, sawtooth or sine function.
  • the display device is designed to display a switched-on state of the heating device to control the lighting element to emit light according to a first lighting characteristic, in particular constantly shining light; for the combined display of a switched-off state of the heating device and a hot state of the installation surface, controlling the lighting element to emit light according to a second lighting characteristic, in particular pulsating light; and/or for the combined display of a switched-off state of the heating device and a cooling state of the installation surface, controlling the lighting element to emit light according to a third lighting characteristic, in particular no light.
  • the respective temperature state of the installation area there is a combined display of the respective temperature state of the installation area and the respective heating state of the heating device. Based on the respective different lighting characteristics, a distinction can be made in particular as to whether the heating device assumes the switched-on state, in which light is emitted according to the first lighting characteristic, or the switched-off state. When the heating device assumes the switched off state, a further distinction can be made between at least a hot state and a cold state of the installation surface based on respective additional lighting characteristics.
  • the heating device can be switched on, i.e. the heating device is switched on, the respective temperature state of the installation area is not displayed. Rather, the lighting element can shine continuously and independently of the respective temperature conditions of the installation area in accordance with the first lighting characteristic.
  • the first lighting characteristic preferably includes that the lighting element lights up constantly, i.e. with a constant intensity, in a non-pulsed manner in a color, for example red. This makes it easy to see that heating is taking place and touching the installation surface should therefore be avoided.
  • the lighting element in this embodiment still emits light even when the heating device is switched off and thus assumes its switched off state. This further emission of light occurs as long as the installation surface is still in the hot state, i.e. a state in which the installation surface is still so hot that it should not be touched. However, so that it becomes clear that the installation surface only radiates its residual heat, but is no longer actively heated, the lighting element now emits light with a changed lighting characteristic, namely according to the second lighting characteristic.
  • the second lighting characteristic preferably includes pulsating light. Since the intensity of the emitted light is not constant, but rather increases and decreases regularly, this lighting characteristic can be easily distinguished from the first lighting characteristic of the switched-on heating state.
  • further lighting characteristics can be provided to identify further states.
  • more than one hot state of the installation surface can be distinguished, in that each hot state has a different one Luminous characteristics are assigned.
  • a gradual change in the temperature state of the installation surface is then preferably indicated by a similarly gradual change in the emitted lighting characteristic, so that the change can be detected particularly intuitively.
  • the display device is designed to control the lighting element to emit pulsating light of different pulse frequencies for the combined display of a switched-off state of the heating device and different hot states of the installation surface.
  • the pulse frequency of the emitted light depends on the hot state of the installation surface.
  • hot states corresponding to hotter temperatures may have a higher pulse frequency than hot states corresponding to lower temperatures. This makes it possible to intuitively record the respective temperature condition of the installation area.
  • faster pulse frequencies are generally perceived more easily and quickly, so that the higher the temperature of the installation surface and thus the risk to a user, the easier it is to perceive the display device.
  • the temperature of the installation surface can basically be made recognizable in any finely graded manner.
  • the respective lighting characteristics can be additionally differentiated, in particular in color, to further clarify the respective states of the magnetic stirrer, so that, for example, when the heating device is switched on and in the hottest of the hot states of the installation surface, the lighting element emits red light and The color changes from red to orange to yellow as the pulse frequency decreases, which signals a decrease in temperature.
  • the magnetic stirrer comprises an actuating element, in particular for switching and/or adjusting the heating device, the display device being provided on the actuating element.
  • the display device can be arranged to encompass the actuating element or be integrated into the actuating element.
  • Such an actuating element can only serve to switch the heating device, i.e. it can be functionally limited to switching the heating device on or off.
  • the actuating element can also serve to further adjust the heating device, for example to adjust a heating output of the heating device.
  • the actuating element which is generally to be operated manually, can be, for example, a toggle switch, push button, rotary knob or the like, such actuating elements also being able to be implemented or simulated by touch-sensitive, in particular capacitive, input elements, such as touch elements can. Since the actuating element is designed at least for switching the heating device on and off, preferably also for further adjustment of the heating device, the fact that the display device is provided on the actuating element allows spatially immediate visual feedback of the respective adjustment to occur.
  • the actuating element can be surrounded on several sides by the display device, in particular by a luminous surface or the said luminous element of the display device, whereby the display device does not necessarily have to completely surround the actuating element.
  • the display device can be integrated into the actuating element, for example by making the actuating element transparent at least in some areas and backlighting this area so that the area functions as a luminous surface of the display device.
  • the magnetic stirrer comprises a temperature sensor for detecting a respective temperature of the installation surface, wherein the display device is designed to determine and display the respective temperature state of the installation area depending on the respective temperature detected by the temperature sensor.
  • a simple platinum measuring resistor can be used as a temperature sensor.
  • the temperature sensor generates a signal that represents the respective temperature of the installation surface and is received by the display device or a control device of the display device.
  • the respective temperature state of the installation area can then be determined there by selecting a respective one from predefined temperature states based on the signal. This temperature state can then be displayed, for example by controlling the lighting element to emit a respective lighting characteristic assigned to this temperature state.
  • the magnetic stirrer comprises a base unit with a common power supply for the magnetic drive, for the heating device and for the display unit, wherein the heating device, in particular a heating plate, is designed separately from the base unit and is arranged on the base unit and has the installation surface.
  • the display device is then preferably provided on the base unit.
  • said actuating element can be provided on the base unit and the display device can then be provided on the actuating element, as explained further above.
  • the display device directly on the heating device, so that the temperature state of the installation area can advantageously be displayed close to or even in the installation area itself.
  • the arrangement of the display device on or in the base unit has the advantage that it can be supplied with electricity more easily and is exposed to the heat generated by the heating device to at least a smaller extent.
  • a magnetic stirrer according to the invention offers greater security against accidental burns thanks to a simple display device that can also be retrofitted.
  • This display device allows a user of the magnetic stirrer to quickly and intuitively recognize whether the installation surface still has residual heat from previous heating, so that touching the installation surface should be avoided.
  • a residual heat display according to the invention can also be provided in other typical laboratory devices which, in addition to basic functionality, also have an additional heating function, with advantages comparable to those of a magnetic stirrer.
  • FIG. 1 An example of a laboratory device with a residual heat display according to the invention is in Fig. 1
  • the magnetic stirrer 11 includes a base unit 13, which is designed as a flat cuboid with a beveled front upper edge.
  • a heating device 15, which has a flat cylindrical shape, is arranged on the top of the base unit 13.
  • the upward-facing front section of this shape is designed as a heating plate that can be heated.
  • the end face of the cylindrical shape forms a support surface 17 of the magnetic stirrer 11.
  • a laboratory vessel with a substance to be stirred and/or heated can be placed on the installation surface 17, which, in the usual arrangement of the magnetic stirrer 11, is aligned horizontally with its underside on a flat surface, such as a table top.
  • a magnetic is used to stir the substance Stirring element is introduced into the substance in the manner of a so-called stirring fish, which can be driven through the underside of the laboratory vessel to produce a stirring movement.
  • a magnetic drive that is not visible from the outside is provided inside the magnetic stirrer 11.
  • This is designed to generate a magnetic field in an area adjacent to the installation surface above the installation surface, which can then exert magnetic forces on the magnetic stirring element, in particular in such a way that the magnetic stirring element rotates at least substantially about the cylinder axis of the cylindrical shape of the heating device 15. In this way, a stirring movement of the magnetic stirring element in the middle of the substance to be stirred can be induced by the magnetic drive provided inside the magnetic stirrer 11.
  • the heating device 15, which can also extend at least partially into the interior of the magnetic stirrer 11, comprises at least one electrical heating element which is in thermal contact with the mounting surface 17.
  • the heating device 15 can heat the mounting surface 17 so that heat can then be transferred from the mounting surface 17 to the respective substance placed on the mounting surface 17 in order to heat the substance.
  • at least the end face of the cylindrical shape of the heating device 15 comprises a material with high thermal conductivity, in particular a metal.
  • a gap can be provided between a lower edge of the lateral surface of the cylindrical shape and the top of the base unit 13.
  • the magnetic drive and the heater 15 are powered by a common power supply that is integrated in the base unit and has a connection for connecting a power plug.
  • the magnetic drive and the heating device 15 are at least adjustable in that they can basically be switched on and off independently of one another in order to selectively stir and/or heat the respective substance.
  • the said bevel of the front upper edge of the cuboid shape of the base unit 13 forms an operating surface 19 of the magnetic stirrer 11, on which several actuating elements 21 for adjusting the magnetic stirrer 11 are arranged.
  • the actuating elements 21 serve in particular to switch the magnetic drive on and off and to adjust a speed of change in the magnetic field in order to thereby adjust the speed of the stirring movement, or to switch the heating device 15 on and off and to adjust a heating power of the heating device 15 in order to adjust the speed of heating.
  • a display device 23 of the magnetic stirrer 11 is provided on the push button 21, which comprises a translucent luminous surface as a luminous element 25, which is backlit by a light source in the form of multi-colored LEDs. This luminous surface surrounds the at least essentially round push button 21 in a ring.
  • the display device 23 is supplied with power via the same power supply that is also provided for the magnetic drive and the heating device 15.
  • the display device 23 is designed to shine continuously with constant brightness and color, in particular red, when the heating device 15 is switched on and for the duration of the switched-on state of the heating device 15. Furthermore, a switched-off state of the heating device 15 can basically be indicated by the display device 23 in that it does not light up.
  • the display device 23 can at least be used to distinguish whether the heating state of the heating device 15 is switched on or off.
  • the display device 23 is also designed to display a respective temperature state of the installation surface when the heating device 15 is switched off. Because if the heating device 15 has heated the installation surface 17 and is then switched off, the installation surface 17 may have residual heat that only gradually decreases. In order to avoid painful contact with the still hot mounting surface 17, if necessary, to warn of this residual heat, the display device 23 can control the lighting element 25 to emit light with a lighting characteristic that deviates from the constant lighting mentioned, at least as long as the mounting surface 17 is uncomfortably high temperature.
  • a high residual heat i.e. a respective temperature of the installation surface 17 in a high temperature range, for example above 100 ° C
  • the luminous surface of the display device 23 flashing at a high frequency, for example approximately 5 Hz.
  • a decrease in temperature over time can also be indicated by the flashing frequency decreasing continuously or in stages.
  • the flashing frequency can be 4 Hz for temperatures between 80° C and 100° C, 3 Hz for temperatures between 60° C and 80° C, 2 Hz for temperatures between 50° C and 60° C, and 2 Hz for temperatures between 40° C and 50°C 1 Hz and for temperatures between 30°C and 40°C 0.5 Hz.
  • the magnetic stirrer 11 To detect the respective temperature of the installation surface 17, the magnetic stirrer 11 has a temperature sensor in the area of the heating device 15, which is arranged directly below the installation surface 17 and is therefore not visible.
  • the display device 23 can determine the presence of one of several predefined temperature states of the installation surface 17 and then display this respective temperature state according to a lighting characteristic assigned to it.
  • the color of the light emitted by the multicolored LEDs also changes from red to orange to yellow.
  • the lighting element 25 emits green light for a defined period of time, for example 10 s, after falling below a certain temperature, for example approximately 30 ° C, before it goes out completely. As a result, the at least essentially complete cooling of the installation surface 17 can be signaled separately.
  • the magnetic stirrer 11 can be seen directly as to whether the heating device 15 is currently switched on or off at a given time and whether, in the latter case, the installation surface 17 still has a dangerously or unpleasantly high residual heat or already so has cooled down so much that a user can touch it without damage.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (6)

  1. Agitateur magnétique (11) comprenant un entraînement magnétique et une surface de pose (17) destinée à un récipient de laboratoire contenant une substance à agiter,
    dans lequel
    l'entraînement magnétique est conçu pour générer un champ magnétique qui est variable de telle sorte qu'un élément d'agitation magnétique dans le récipient de laboratoire peut être animé d'un mouvement d'agitation, afin d'agiter la substance,
    l'agitateur magnétique (11) comprend en outre un dispositif de chauffage (15) conçu pour chauffer la surface de pose (17), afin de chauffer la substance,
    l'agitateur magnétique (11) comprend un dispositif d'affichage (23) conçu pour afficher un état de température respectif de la surface de pose (17), le dispositif d'affichage (23) est en outre conçu pour afficher un état de chauffage respectif du dispositif de chauffage (15),
    caractérisé en ce que
    l'affichage d'états de température respectifs et d'états de chauffage respectifs s'effectue de façon combinée, différentes combinaisons d'un état de température respectif et d'un état de chauffage respectif étant affichées par différents signaux optiques, de sorte qu'un signal individuel respectif permet de conclure aussi bien à l'état de température respectif de la surface de pose (17) qu'à l'état de chauffage respectif du dispositif de chauffage (15), le dispositif d'affichage (23) comprenant un élément lumineux (25) apte à être piloté pour émettre de la lumière,
    le dispositif d'affichage (23) étant conçu pour, en vue de l'affichage de différents états de température de la surface de pose (17) et/ou de différents états de chauffage du dispositif de chauffage (15), piloter l'élément lumineux (25) afin qu'il émette une lumière ayant différentes caractéristiques lumineuses respectives,
    le dispositif d'affichage (23) étant conçu pour, en vue de l'affichage combiné d'un état éteint du dispositif de chauffage (15) et de différents états chauds de la surface de pose (17), piloter l'élément lumineux (25) afin qu'il émette une lumière pulsée de fréquence d'impulsions différente.
  2. Agitateur magnétique selon la revendication 1,
    caractérisé en ce que
    le dispositif d'affichage (23) est conçu pour, en vue de l'affichage d'un état allumé du dispositif de chauffage (15), piloter l'élément lumineux (25) afin qu'il émette une lumière selon une première caractéristique lumineuse, en particulier une lumière constante ; en vue de l'affichage combiné d'un état éteint du dispositif de chauffage (15) et d'un état chaud de la surface de pose (17), piloter l'élément lumineux (25) afin qu'il émette une lumière selon une deuxième caractéristique lumineuse, en particulier une lumière pulsée ; et/ou en vue de l'affichage combiné d'un état éteint du dispositif de chauffage (15) et d'un état froid de la surface de pose (17), piloter l'élément lumineux (25) afin qu'il émette une lumière selon une troisième caractéristique lumineuse, en particulier aucune lumière.
  3. Agitateur magnétique selon la revendication 1 ou 2,
    caractérisé en ce que
    les caractéristiques lumineuses respectives pour l'affichage de différents états de température de la surface de pose (17) se distinguent en ce qui concerne la fréquence d'impulsions, la couleur et/ou la luminosité de la lumière émise par l'élément lumineux (25) respectif.
  4. Agitateur magnétique selon l'une au moins des revendications précédentes, caractérisé en ce que
    l'agitateur magnétique (11) comprend un élément d'actionnement (21), en particulier pour commuter et/ou régler le dispositif de chauffage (15), le dispositif d'affichage (23) étant prévu sur l'élément d'actionnement (21), en particulier étant disposé de manière à entourer l'élément d'actionnement (21) ou étant intégré dans l'élément d'actionnement (21).
  5. Agitateur magnétique selon l'une au moins des revendications précédentes, caractérisé en ce que
    l'agitateur magnétique (11) comprend un capteur de température pour détecter une température respective de la surface de pose (17),
    le dispositif d'affichage (23) étant conçu pour constater et afficher l'état de température respectif de la surface de pose (17) en fonction de la température respective détectée par le capteur de température.
  6. Agitateur magnétique selon l'une au moins des revendications précédentes, caractérisé en ce que
    l'agitateur magnétique (11) comprend une unité de base (13) munie d'une alimentation électrique pour l'entraînement magnétique, le dispositif de chauffage (15) et l'unité d'affichage (23),
    le dispositif de chauffage (15), en particulier une plaque chauffante, étant réalisé séparément de l'unité de base (13) et étant disposé sur l'unité de base (13) et présentant la surface de pose (17),
    et le dispositif d'affichage (23) étant prévu sur l'unité de base (13).
EP17721358.4A 2016-05-11 2017-05-02 Agitateur magnétique Active EP3439775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016108749.1A DE102016108749A1 (de) 2016-05-11 2016-05-11 Magnetrührer
PCT/EP2017/060332 WO2017194342A1 (fr) 2016-05-11 2017-05-02 Agitateur magnétique

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EP3439775A1 EP3439775A1 (fr) 2019-02-13
EP3439775B1 true EP3439775B1 (fr) 2023-09-20
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DE (1) DE102016108749A1 (fr)
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DE102019112943A1 (de) 2019-05-16 2020-11-19 Ika-Werke Gmbh & Co. Kg Laborgerät, Laborgeräteanordnung sowie Verwendung eines Laborgeräts
USD926061S1 (en) * 2019-09-17 2021-07-27 Yan Jiang Electronic scale
USD1013203S1 (en) * 2019-10-25 2024-01-30 Hans Heidolph GmbH Magnetic stirrer
CN112808128A (zh) * 2021-02-04 2021-05-18 佛山市原创上品产品设计有限公司 磁力搅拌器及其用的搅拌件

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Also Published As

Publication number Publication date
EP3439775A1 (fr) 2019-02-13
WO2017194342A1 (fr) 2017-11-16
DE102016108749A1 (de) 2017-11-16
ES2962276T3 (es) 2024-03-18
US20190134582A1 (en) 2019-05-09
US10967344B2 (en) 2021-04-06
EP3439775C0 (fr) 2023-09-20

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