DE202005014025U1 - Method for drying walls using a controlled oscillator to power an inductive heating system for non contact drying and with a self test facility - Google Patents

Abstract

An inductive heating system for drying walls, especially in a closed room has air cored an induction coil (5) powered by a driver (4) to provide heating pulses. The driver is linked to a controller (2) with LCD display (3) and with a feedback loop (6) from the coil, for a self test facility, e.g. to determine if the coil is shorted etc. The drying system is linked to a PC via an RS-232 interface (1). The drying process is automatically adapted to the size of room.

Description

The The invention relates to a device for dehumidifying masonry in enclosed spaces

There is known a device for dehumidifying masonry ( EP 395085 A1 ), in which the masonry is exposed by means of an electromagnetic resonator (LC resonant circuit) and emitted by an emitting device electromagnetic radiation is exposed. In this case, the resonator for generating the electromagnetic radiation is excited with periodic electrical pulses having a pulse repetition frequency smaller than the natural oscillation frequency of the resonator to natural oscillations, wherein the natural oscillation frequency of the resonator in the range of 141 kHz +/- 4 kHz. After each excitation of the resonator occurs by a pulse train signal to a high-frequency, damped oscillation whose amplitude falls during the duration of half a period of the pulse train signal to a value below 10% of the maximum amplitude of the oscillation. The electromagnetic waves emitted by the coil act without contact on masonry and cause its dehumidification. The disadvantage here is that the adjustment of the resonant circuit requires a high technical effort that the resonance frequency of the resonant circuit is subject to fluctuations by metal parts in the vicinity of the air coil and is dependent on air pressure and humidity.

Out DE 29511719 U1 It is known to precede the coil with a frequency-stable oscillator, by which a high-frequency alternating voltage is generated, with which the air-core coil is acted upon. Even if the environmental influences are thus reduced, adaptation to different room sizes is not possible and continuous function monitoring of the operation is not provided for.

Finally, devices for drying and dehumidifying masonry are known in which electrodes must be introduced into the masonry ( DE 10202764 A1 . DE 2649611 A1 ), even if the drying process is controlled by the microprocessor depending on the moisture content of the masonry ( DE 19944757 A1 ).

task The invention is a device to develop the dehumidification of masonry that is easy in the technical realization is and dehumidifying accordingly Room size individually is adjustable, in which no electrodes introduced into the masonry Need to become and in which both a permanent Control of the operation takes place as well as any failure signaled immediately becomes.

According to the invention Task solved by that a RS-232 interface of a PC via a microcontroller both connected to an LCD display as well as to a driver, wherein the output of the driver is connected to an air coil, and that the air coil over an induction monitoring fed back to the microcontroller is.

Of the Advantage of the invention is that the device for dehumidification of masonry without electrodes in the masonry, right after the Switch on constantly performs a self-test, in an unconnected or short-circuited air spool detected and that a quick adaptation to the room size can be done.

The Invention will be explained in more detail with reference to an embodiment. The associated Drawing shows in:

1 : the block diagram of a device for dehumidifying masonry

In 1 is shown the block diagram of a device for dehumidifying masonry. An RS-232 interface 1 a PC is via a microcontroller 2 both with an LCD screen 3 as well as with a driver 4 connected, the output of the driver 4 with an air coil 5 connected is. The air coil 5 is via an induction monitoring 6 on the microcontroller 2 fed back.

The device for dehumidifying masonry generates a pulsed magnetic field whose pulse shape is set via a PC program. This pulse shape is permanently stored in the microcontroller. The current configuration is displayed on the LCD 3 displayed.

The Device for Dehumidification of masonry is due to dehumidifying room size by change of strength of the electromagnetic field, the supplied current is changeable, individual adjustable.

In the operation of the device is constantly the induction of the air coil 5 checked. For this purpose, one microsecond after switching off the coil current, the induction voltage at the air coil 5 measured. This voltage is at least 60% for a properly connected air coil. If the measured voltage is lower than this, an error will be displayed on the LCD 3 displayed. Through this induction monitoring of the air coil 5 is given a high reliability of the device, as a failure of the air coil 5 or the spool driver. In the microcontroller 2 the number of operating hours is counted in the LCD display 3 is shown. All parameters can be set via an infrared interface.

1

RS-232 interface

2

microcontroller

3

LCD display

4

driver

5

air coil

6

induction monitoring

Claims (1)

Apparatus for dehumidifying masonry, characterized in that an RS-232 interface ( 1 ) of a PC via a microcontroller ( 2 ) with both an LCD display ( 3 ) as well as with a driver ( 4 ), the output of the driver ( 4 ) with an air coil ( 5 ), and that the air coil ( 5 ) via an induction monitor ( 6 ) on the microcontroller ( 2 ) is fed back.