VALVE

The invention relates to an executive set of head of remotely controlled central heating radiator valve, designed for use on single central heating radiators.

An important element of the remotely controlled - by radio or wire - head is its executive set which applies pressure and moves the needle of the radiator valve. The needle of the valve is pushed away from the valve with considerable force by its internal spring. Depending on the size of the control signal, the executive set changes the amount of the heating medium flowing through the radiator, by moving the needle valve.

A thermostatic cap of central heating radiator valve is known from the patent description 195661 PL. The cap includes an electric drive motor powered by two batteries. The engine through a system of gears causes the first pusher screw to move in relation to the second pusher screw through which it reduces or increases the active length of the regulator mandrel which moves the cone controlling the flow of the heating medium.

The aim of the present invention was to develop a design of an executive set of head of remotely controlled central heating radiator valve of simple construction, an electric micro-engine motor, and a reducer gear of which will transmit only the torque and which will not be subjected to axial pressure. The executive set of head of remotely controlled central heating radiator valve, of the present invention, has a body mounted on the valve, whereas the body contains inside an electric micro-motor with a gear of high reduction ratio.

The essence of the solution of the executive set of the present invention is characterized in that the inside of the body contains shaped guides between which directly or indirectly an electric micro-motor is mounted in a manner allowing it to slide, together with the integrated reduction gear, whereby its output shaft is finished with a shift screw screwed freely into the front wall of the body, and this shift screw contacts directly or indirectly the radiator valve control needle. The guides are in the form of two columns on which a shaped slider is mounted in a manner allowing it to slide, on which an electric micro-motor with the reduction gear is mounted. The guides have longitudinal blades, which slide into the longitudinal grooves of the slider. The electric micro-motor with the reduction gear is immobilised in the slide by its elastic pawls. On the end of the shift screw there is an intermediate element. The advantage of the solution of the executive set is its simple design with a relatively small number of components. Free sliding of the micro-motor with the gear results in them not being subjected to axial forces, which increases the durability of the power unit.

The object of the invention is illustrated in the drawing in which fig. 1 - shows, in an axonometric projection, a view of the executive set with removed cover, fig. 2 - shows a longitudinal cross-section of the executive set and fig. 3 - shows a view of the valve head.

The executive set of the head of remotely controlled central heating radiator valve in the exemplary embodiment of the present invention has a body 1_ in a shape similar to a cuboid, made of plastic, mounted on the valve 2 of the central heating radiator. The body 1_ inside includes an electric micro-motor 3 with integrated reduction gear 4 with a high ratio whereby the electric micro-motor itself is powered by two long life batteries. Inside the body 1 there are two parallel, shaped guides 5 in the shape of columns, between which indirectly, through the slider 6 the electric micro-motor 3 with reduction gear 4 is embedded and the slider 6 is mounted on the guides 5 in a manner allowing it to slide. The guides 5 have longitudinal blades 7 which enter in a sliding manner in the longitudinal grooves 8 of the slider 6. The electric micro-motor 3 with reduction gear 4 is immobilised on the slide 6 with its elastic pawls 9. The output shaft 10 of the reduction gear 4 is finished with a shift screw H screwed freely into the front wall

12 of the body 1 and this shift screw H is in indirect contact with a control needle

13 of the valve 2 of the radiator through an intermediate element 14 which is made of plastic with a low friction coefficient, preferably of Teflon. The control needle 13 is pushed away from the valve 2 with its internal spring and is constantly pressed against the shift screw 11. by an intermediate element 14 which eliminates the direct friction between the rotating shift screw Λ Λ_ and fixed control needle 13 of the valve 2. Depending on the direction of the electric micro-motor 3 rotation, the shift screw 11_ is screwed in or out what forces a change in the position of the control needle 13 of the valve 2 thereby regulating the flow of the heating medium through the radiator. During screwing the shift screw H in or out, a move of the slider 6 takes place, together with the micro-motor 3 and reduction gear 4. The use of freely sliding power unit eliminates harmful axial pressure on the micro-motor 3 bearing and the reduction gear 4 because the micro-motor 3 and the reduction gear 4 transmit only the torque, effect of what is an increased service life and reliability of the valve head 2.