CS269701B1 - Electric electrode three-phase heating system - Google Patents

Abstract

The electric electrode heating system with fixed electrodes consists of two three-phase electrode systems, the first of which consists of electrodes (1) with the basic electrode length and the length of the electrodes (2,3) of the second system is divided in the ratio 1 : 2', with the electrodes (2,3) of the second system being on a common longitudinal axis and the second system of electrodes (2,3) representing a centrally symmetrically opposite complement to the first system of electrodes (1). By combining the connection of the first system of electrodes (1) and the second system of electrodes (2,3) including combinations of phase connections in the second system, the power of the electrical system is adjusted in up to nine different stages. The solution finds application for adapting the power of electrode systems to different electrical conductivity of water or for stepwise regulation of the power of electrode systems for heating purposes.

Description

The invention relates to an electric three-phase electrode heating system with electrodes for multi-stage power regulation.

The performance of an electric electrode heating system depends on the distance between the electrodes. Until now, the required performance of the electrode system of a system with fixed electrical conductivity, water, was achieved either by an individually designed or dimensionally adapted system of electrodes for a given electrical conductivity, which precludes series production. In the series production of electrode heating systems, in order to ensure the required performance levels, it is still necessary to chemically treat the water for filling the heating system so that, in addition to the prescribed alkalinity protection, it also has the prescribed electrical conductivity, which is completely individual with different chemical compositions of untreated water, and therefore difficult to implement, especially in turbid heating electric boiler rooms.

This problem is solved by the invention of an electric electrode three-phase heating system with fixed electrodes for multi-stage power regulation, consisting of two three-phase electrode systems, in which the first is formed by electrodes of the basic electrode length, the essence of which is that the second system is formed by short and long electrodes and the ratio of their lengths is 1:2. The short and long electrodes are on a common longitudinal axis and represent a centrally symmetrically opposite complement to the electrodes of the first system.

The practical application of the invention of an electric electrode three-phase heating system with fixed electrodes for multi-stage power regulation enables the mutual combination of the connection of individual electrode systems, including combinations of phase connections, and nine-stage regulation. This allows the required power of the three-phase electrode system to be set in a wide range of electrical conductivity of water, and the thus electrically connected electrode three-phase system to be controlled by another power regulation or to use the free power regulation stages remaining in the electrode system after setting the required power by a regulation stage that corresponds to the conductivity of the water in the system, thereby eliminating the water temperature.

The negative effect of the change in the electrical conductivity of the second system is that the heating system outputs are evenly graded in the ratios y N : N : j N, where N is the maximum achievable heating system output.

In the drawing, Fig. 1 shows in longitudinal section A-A the division of the lengths of the electrodes of the second system into short electrodes £ and long electrodes χ, Fig. 2 shows in cross section B-B of the heating system the mutual position of the electrodes χ of the first system with short electrodes 2 and Fig. 3 shows in cross section C-C the mutual position of the electrodes χ of the first system with long electrodes χ. The electrodes χ of the first system, short electrodes 2 and long electrodes χ are placed on a common pitch circle, with the electrodes of each system being spaced apart by an angle of 120° on the pitch circle and the system of short electrodes 2 and long electrodes χ is rotated by an angle of 60° relative to the first system of electrodes χ. The co-located short electrodes 2 and long electrodes 3 are on a common longitudinal axis and are centrally symmetrically positioned to the electrodes χ of the first system, and the zero electrode 4 is in the axis of the heating system.

The function of the electrode heating system, which refers to the connection related to the same electrical conductivity electrically from the following partial connections. In all connections, all variations of possible applications of conductive liquids are zero, the electrode χ can be assembled electrically conductively connected

and)

b)

C)

d) with a sheath and connected to a protective conductor against dangerous touch voltage of non-live parts.

By connecting phase voltages χχ, L2, L3 only to the short electrodes 2 of the second y, we achieve the maximum achievable power. There is no connection to the other electrodes. By connecting phase voltages χχ, L2, L3 only to the long electrodes χ of the second y, we achieve the maximum achievable power.

By connecting phase voltages χχ, L2, L3 only to the long electrodes χ of the second one, we achieve the maximum achievable power.

Three-phase supplied voltage.

three-phase system three-phase system i and By connecting phase voltages LI, L2, L3 to the electrodes of the first electrode system, we also achieve the maximum achievable power.

CS 2697ΌΙ Bl

By combining the connection of phase voltages LI, L2, L3 according to a) and according to d) so that adjacent pairs of electrodes of the first and second systems are connected to incompatible voltages, we obtain y m.i- i mally achievable power.

By combining the connection of phase voltages L1, £2, L3 according to b) and according to d) so that adjacent pairs of electrodes of the first and second systems are connected to the same phase voltage, we obtain the maximum achievable power.

In this way, it is possible to create variations in the connection of short electrodes 2 and long electrodes 5 of the second three-phase system, compared to the electrodes £ of the first three-phase system, for example: /

By combining the connection of phase voltages ££, £2, L3 according to c) and according to d) so that adjacent pairs of electrodes of the first and second systems are connected to the same phase voltage, we obtain j of the maximum achievable power.

By combining the connection of phase voltages LI, L2, L3 according to c) and according to d) so that adjacent pairs of electrodes of the first and second systems are connected to discordant phase voltages, we maintain the maximum achievable power.

Electric electrode three-phase heating systems with fixed electrodes for multi-stage power regulation are used to adapt their power according to the electrical conductivity of water or for step-by-step power regulation.

Claims (1)

An electric electrode three-phase heating system with fixed electrodes for multi-stage power regulation, consisting of two three-phase electrode systems, the first of which is formed by electrodes of the basic electrode length, characterized in that the second electrode system is formed by short electrodes (2) and long electrodes (3), the ratio of their lengths being 1:2, the short electrodes (2) and long electrodes (3) are located on a common longitudinal axis and represent a centrally symmetrical opposite complement to the electrodes (1) of the first system.