JP5033830B2 - Rotary evaporator - Google Patents

Description

  The present invention relates to a rotary evaporator used in a laboratory or a laboratory.

  The outline of a rotary evaporator generally used in a laboratory or laboratory is, for example, a sample container 105 for distilling a sample at one end of a rotary joint 103 rotatably supported by a drive unit 101 such as a motor as shown in FIG. Are connected and rotate together with the rotary joint 103. The other end faces the condenser 107.

  The sample container 105 rotates while being heated by a water bath 109 serving as a heating means, so that the vaporized sample vapor is fed into the condenser 107 through which cooling water flows through the rotary joint 103 and then condensed. Condensed in the vessel 107 and collected by the receiving flask 111.

JP 2007-098246 A

  The sample container 105 of the rotary evaporator serves as a means for taking out the sample vapor by rotating while being heated by the water bath 109, but the water bath 109 for heating the sample container 105 is generally placed up to a certain liquid level. Water or oil is used and heated to a certain temperature.

  For this reason, in the means using the water bath 109, a replenishment work is required when the liquid level drops, and thus a maintenance work for keeping the liquid level constant is required. In particular, since the temperature temporarily drops during replenishment, there remains a problem in terms of stable temperature management.

  In addition, there is a problem that handling is troublesome, such as water or oil may spill out from the water bath 109.

  Therefore, an object of the present invention is to provide a rotary evaporator that can perform stable heating management of a sample container without using a water bath that uses water or oil.

In order to achieve the above object, the present invention has a sample container rotatably supported by a drive unit and a heater equipped with induction heating means for induction heating the sample container at the time of rotation,
The induction heating means includes an induction electrode having a U-shaped cross section that is provided in the heater and formed upward so that an alternating current flows.
It is comprised with the electromagnetic derivative provided along the surrounding wall surface of the said sample container arrange | positioned and set in the said induction electrode.

  In carrying out the present invention, first, the container body of the sample container is formed into a cylindrical body, thereby providing a wide facing area with respect to the U-shaped induction electrode so that efficient induction heating can be performed. It is desirable to be able to obtain the desired rotation.

  Second, it is desirable to obtain an electromagnetic derivative having a large area by embedding the electromagnetic derivative in the outer periphery or inside of the peripheral wall surface of the sample container.

  According to the present invention, it is possible to easily arrange and set the sample container by the U-shaped induction electrode and to surround a part of the peripheral wall region in a U-shape, which leads to securing a large induction heating surface, and efficiency. A good sample container heating state can be obtained.

  In addition, since water or oil that serves as a heating means for the sample container is not used, troublesome maintenance of water or oil is unnecessary, and the experiment can be performed cleanly without polluting the surroundings.

BRIEF DESCRIPTION OF THE DRAWINGS Outline | summary explanatory drawing of the whole rotary evaporator concerning this invention. Outline explanatory drawing showing the relationship between the condenser, rotary joint, and drive unit. FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. 1. Outline explanatory drawing of a sample container. Outline | summary explanatory drawing of a U-shaped induction electrode. Explanatory drawing which provided the heat retention cover which rotates a hinge on a U-shaped induction electrode as a fulcrum. Outline explanatory drawing of a heater. The schematic explanatory drawing of the rotary evaporator which showed the prior art example.

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 7.

  FIG. 1 is a schematic explanatory diagram of the entire rotary evaporator. The drive unit 3 of the rotary evaporator 1 is supported by a movable member (not shown) of an elevating device 7 that is configured by a motor or the like and is erected on a base 5 so as to be movable up and down. The movable member of the elevating device 7 moves up and down by the switch operation of the operation switch 9, and the drive unit 3 can be moved up and down within the range of the guide hole 11 that is vertically long.

  As shown in FIG. 2, a pipe-like rotary joint 15 whose inside is a communication path 13 is rotatably supported by the drive unit 3 in a state where the pipe 3 is inclined and raised. The sample container 17 is detachably connected to one joint opening end 15a on the lower end side of the rotary joint 15 through a connection means 18 such as a clip, and the rotation of the sample container 17 is performed through the rotary joint 15. It is possible.

  The other of the rotary joint 15 on the rising end side faces the condenser 19. The sample container 17 is made of glass and is formed in a cylindrical body having a circular cross section as shown in FIGS. A strip-shaped electromagnetic derivative 21 made of metal is provided in a ring shape on the peripheral wall surface formed in the cylindrical body.

  The electromagnetic derivative 21 is made of a material such as iron or stainless steel having a large electric resistance, and an induction heating means 26 is constituted by the induction electrode 25 of the heater 23.

  In this case, the electromagnetic derivative 21 may be an integral shape embedded in the peripheral wall of the sample container 17.

  The heater 23 has a unit structure provided with a support leg portion so that it can be installed and used in a predetermined place, and an induction electrode 25 for inductively heating the sample container 17 is provided on the upper portion.

  The induction electrode 25 is formed by bending a spiral conductive wire into a U-shaped cross section formed in a U-shaped cross-section upward as shown in FIG. The outer periphery is entirely surrounded by an insulating material 27 such as glass, and the insulating material 27 and the induction electrode 25 constitute an upward U-shaped heating portion 29. The insulating material 27 eliminates direct metal contact with the induction electrode 25 to prevent a short circuit accident.

  As shown in FIG. 7, the U-shaped induction electrode 25 is operated via a control unit 35 provided in the heater by operating each operation switch 33 of the control panel 31 provided in front of the heater 23. Control is performed so that a predetermined alternating current that has been set flows.

  As shown in FIG. 3, the U-shape of the induction electrode 25 is a depth that covers a partial region of the peripheral wall of the sample container 17 formed in a cylindrical body, and covers the lower half with a predetermined gap set in this embodiment. Is made. The U-shaped depth is a means for enlarging the opposing area and induction heating area surrounding the electromagnetic derivative 21 of the sample container 17 to be arranged and set.

  Further, the upward U-shaped heating part 29 has a function of rotatably supporting the bottom side of the sample container 17 that is inclined downward, in addition to the function of arranging and setting the sample container 17 so as to be freely rotatable from above. have. The support means 36 is a contactless support type that utilizes the repulsive force of the magnet 36 a provided in the heating unit 29 and the magnet 36 b provided along the outer periphery of the bottom of the sample container 17.

  In addition, it is desirable that the upward U-shaped heating unit 29 is provided with a heat retaining cover 39 that rotates about a hinge 37 that covers the upper half of the sample container 17 during rotation as shown in FIG. In this case, the induction electrode 25 may be formed as a cylinder including a heat insulating cover.

  On the other hand, the condenser 19 facing the other end of the rotary joint 15 is made in a glass cylindrical shape and can be moved up and down together with the drive unit 3. Inside the condenser 19, a condensing spiral 41 through which cooling water flows is provided.

  In addition, the cock connection portion 43, the flask connection portion 45, and the joint connection portion 47 are each a single piece made into an integral shape. As a result, it is possible to secure high internal airtightness by eliminating the connection area by using one component.

  The condensing spiral 41 has an outer end, for example, an inlet 41a connected to a water supply or the like, and an inner end serving as an outlet 41b for drainage. The sample vapor sent in is condensed. In this case, if there is a condensing action, it does not necessarily have to be a spiral type, and may be of a double tank structure type comprising an inner tank provided with a coolant inside and an outer tank outside thereof.

  On the other hand, the flask connection part 45 is detachably mounted with a receiving flask 51 via a connection means 53 such as a clip.

  The cock connecting portion 43 and the joint connecting portion 47 are arranged along an inclined axis X inclined at a predetermined angle, and the rotary joint 15 described above is freely rotatable on the joint connecting portion 47 via a seal member (not shown). Insertion is supported.

  As shown in FIG. 1, a manual cock 55 is rotatably attached to the cock connection portion 43 in a state of being in close contact with each other. A sample tube 57 is connected to the manual cock 55, and the sample tube 59 has a shape extending through the communication path 13 serving as the internal space of the rotary joint 15 and extending into the sample container 17.

  The cock port 55a of the manual cock 55 and the cock port 43a of the cock connection portion 43 are configured such that when the manual cock 55 is rotated and the boards 55a and 43a are opposed to each other, the cock port 43a and the sample container 17 are connected via the sample tube 59. For example, the sample can be replenished.

  In this case, the sample tube 59 is for sample replenishment as described above, and may be removed depending on the experiment.

  In FIG. 1, reference numeral 61 denotes a connection port connected to a vacuum pump (not shown), which can keep the inside of the condenser 19 at a predetermined degree of vacuum.

  According to the rotary evaporator 1 configured as described above, the sample vapor converted into the vapor by rotating the sample container 17 arranged and set in the U-shaped induction electrode 25 is converted into a condenser via the rotary joint 15. After being fed into 19, it is condensed in the condenser 19 and collected by the receiving flask 51.

  At this time, the arrangement and setting of the sample container 17 can be performed without hindrance, and the induction electrode 25 surrounds the lower half of the sample container 17 in a U-shape, so that a large induction heating surface is secured and accurate induction heating with high efficiency is achieved. Is obtained.

  In addition, since no water or oil is used, the experiment can be performed cleanly without polluting the surroundings.

DESCRIPTION OF SYMBOLS 1 Rotary evaporator 3 Drive part 17 Sample container 21 Electromagnetic derivative 23 Heater 25 Induction electrode 27 Insulation material 29 Heating part

Claims (3)

A sample container rotatably supported by the drive unit, and a heater equipped with induction heating means for induction heating the sample container during rotation;
The induction heating means includes an induction electrode having a U-shaped cross section that is provided in the heater and formed upward so that an alternating current flows.
A rotary evaporator comprising: an electromagnetic derivative provided along a peripheral wall surface of the sample container disposed and set in the induction electrode.   The rotary evaporator according to claim 1, wherein the container body of the sample container is formed in a cylindrical body.   The rotary evaporator according to claim 1 or 2, wherein the electromagnetic derivative has a shape embedded in an outer periphery or inside of a peripheral wall surface of a sample container.

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