Patent Application
20110031232
The invention concerns a device for heating an object by means of a water bath, especially for strips of pathologic or histologic sections, especially paraffin sections, before microscopic examination, with a housing and a trough inserted in the housing, the water bath being temperature-controllable by means of electric heating.
Generic devices are known from practice in a variety of versions. They are used to heat or temperature-control a water bath, this again being used for strips of paraffin sections in the histologic laboratory.
The devices known from practice of the generic type are problematical to the extent that the desired temperature can only be approximately stipulated via multistage switches. Not rarely, the temperature is measured via an external thermometer or no temperature display at all is provided. The known devices are therefore problematical in use and have only limited operating convenience.
The underlying task of the present invention is therefore to configure and modify a device for heating of an object with a water bath, especially the strips of pathologic and histologic sections, especially paraffin sections, before microscopic examination, so that the highest degree of operational reliability with sufficiently good operating convenience is achieved in the simplest design.
The aforementioned task is solved by the features of Claim 1. The generic device is characterized by the fact that electric heating includes at least one heating plate allocated to the bottom of the trough, and that a stipulated water temperature is controllable.
According to the invention, electric heating includes at least one heating plate assigned to the bottom of the trough. The trough bottom is therefore directly heated over its surface. A stipulated water temperature can be controlled according to the heating plate. This means that, throughout operation, the water temperature is determined by means of a temperature sensor and heating regulated accordingly. It is therefore guaranteed that the water bath always has the desired temperature, regardless of the ambient temperature, the through-put and the operating time.
The electric heating advantageously includes at least two or more heating plates, in which case the bottom area of the trough can be sectioned accordingly. The heating plates can then be activated together or individually. It is also conceivable that the heating plates include a circular configuration and circular ring segments around it in the center of the bottom area. Here again, joint or individual activation is possible according to the energy demand.
In principle, it is conceivable that the heating plates, regardless of their specific configuration, can be integral components of the bottom of the trough. It is advantageous, with respect to simple design, if the heating plates are connected, preferably glued, from the bottom to the bottom of the trough. It is then a particularly advantageous, if the heating plates are glued with an adhesive with high heat conductivity, in order to favor heat conduction into the water being heated.
It is also conceivable that the side walls of the trough are provided with heat elements, in which these heat elements can also be heating plates, but also heating tubes, heating cables, etc.
Heating of the water bath is favored by the fact that the wall of the trough in the bottom area is made as thin as possible, preferably has a thickness of about 1 mm. In other words, the bottom area should be made thin enough, that it is still sufficiently stable, but guarantees excellent heat transfer from the heating device or heating element into the water.
With reference to configuration or manufacture of the housing, it is conceivable that it is made as a monolithic block. The housing can then be made from an aluminum block. The surface of the housing is preferably brightly anodized.
The trough arranged in the housing and fastened there can be made from aluminum. The surface of the trough can also be anodized, in which case the thing to do is to darkly anodize the surface of the trough, especially make it black, in order to avoid reflections within the trough.
With particular advantage, the trough has a support surface for positioning of samples, slides, etc. at least partially covering the trough. It is then conceivable that the support surface covers the entire trough. The support surface can have significant width, namely a width in the range from 30 mm to 70 mm, preferably about 50 mm. The precaution of the support surface offers the operating person significant safety and facilitation during work.
To further advantage, the support surface is bounded by a continuous outer edge raised relative to the support surface, so that no liquid can reach the base or table.
It is also conceivable that the support or edge has a marking for the position of a discharge/drain, namely as an orientation for the operating person.
The support surface can also be heated. Heating of the support surface can be activated and controlled independently of heating in the bottom area. In each case, it is essential that the support surface can also serve for temperature control or drying of objects situated on it.
The housing and/or the trough can be equipped with additional functional devices or units. For example, it is conceivable that the trough is equipped with an optical and/or electrical or electronic water level display. An optical water level display could be implemented via a window in the trough, visible from outside of the housing. An electrical or electronic water level display could be implemented via a display on the housing.
A further advantage is, if the trough is equipped with illumination that could be activated in alternation, preferably with underwater illumination. Illumination includes at least one diode as illuminator. The illumination advantageously includes two diodes, switchable independently of each other, preferably for emission of white and blue light. In principle, it is conceivable that the illumination is designed as RGB illumination with adjustable colors or adjustable wavelength. The illumination is preferably made in the sides of the trough, so that dazzling of the operating person is effectively avoided.
It has already been mentioned that the housing can be equipped with a display. The housing could have a front viewing surface with a display and with separate or integrated operating elements. If the operating elements are integrated in the display, the display with the operating elements could be designed with a touch panel.
Electronics for temperature control and control of additional parameters or quantities can also be provided in the housing. It goes without saying that the electronics receive signals from sensor devices or a transmitter arranged in the wall of the trough or provided there. In each case, the temperature is regulated to a stipulated or adjustable value, regardless of external influences.
Also advantageously, the electronics include an emergency off function, so that heating is deactivated on falling below a preferably stipulated lower water level in the trough. It is also conceivable that during falling short of a lower water level, an optical and/or acoustic signal occurs, according to which refilling with water is necessary. It is also conceivable that the device is provided with a water connection, which automatically controls the water level. In this case, the filling amount is detected and can be continuously replenished.
With reference to assembly of the devices, it is advantageous, if the trough is inserted into the housing and fastened there. The thing to do is to insert the trough from above into the housing, in which case the housing includes an inner edge that serves for support. For reliable assembly, the trough is preferably screwed to the housing from below. No fastening devices are recognizable from above the device in the context of this configuration.
Finally, a bottom cover for closure of the housing on the bottom is provided, in which the bottom cover is screwed to the housing. Support pads for secure setup of the device are preferably provided on the screws.
There are different possibilities for configuring and modifying the instructions of the present invention advantageously. For this purpose, the claims subordinate to Claim 1, on the one hand, and the following explanation of the practical example of the invention with reference to the drawing, on the other hand, are referred to. In conjunction with explanation of the preferred practical example of the invention with reference to the drawing, generally preferred embodiments and modifications of the instructions are also explained. In the drawing
Electric heating according to the invention includes at least one heating plate 4 assigned to the bottom 3 of trough 2, the heating plate only being indicated in
According to the depiction in
It should be noted here that the wall of trough 2 in the bottom area is made as thin as possible, preferably with a thickness in the range from 1 mm or even less.
The housing 1 is made as a monolithic block from an aluminum block. The surface of the housing 1 is brightly anodized.
The trough 2 is also made of aluminum and anodized darkly or black.
In additional, an edge 6 surrounding the support surface 5 is also provided, which secures parts against falling down, on the one hand, and, on the other hand, prevents liquid from running down laterally along the housing wall. Soiling is thus avoided and a high degree of operational reliability is achieved.
The support surface 5 also has a marking 7 for the position of a discharge/drain. The drain can be arranged in trough 2 or in housing 1, discharge can occur into trough 2 or into a discharge vessel, not shown in the figures, arranged in housing 1.
In the interest of simple depiction, showing of the electronics is dispensed with. It is only indicated in
A recess 12 is provided in trough 2, which is closed via a glass insert 13, a seal 14 and a glass cover 15. This precaution permits visual control of the water level, this occurring via a view window 16 in display 9 or on display 9. The display 9 is fastened in a recess 18 in the housing via a frame 17, the display 9 being covered by a special film 19.
Finally, it is noted that the practical example just explained serves merely to explain the device according to the invention, but does not restrict it to the practical example.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2008 020 002.6 | Apr 2008 | DE | national |
| 10 2008 023 660.8 | May 2008 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/DE2009/000504 | 4/20/2009 | WO | 00 | 10/29/2010 |
