DE573672C - Electrically controlled valve with an electrically heated thermostat - Google Patents

Description

There are already electrical remote control devices for heating and ventilation systems known that a final ßorgan depending on a meter away, also in Control outdoor switches operated by hand or thermostat. Usually electromagnetic ones are used for this purpose Adjusting devices are used whose adjusting force can be very large, in particular for actuating large valves and the like must, so that the various resistances in the closing organ can be surely overcome. This requires large and expensive facilities whose function is not always perfect. They also have to The electrical equipment required must be specially protected as it is exposed to the elements, especially moisture are.

There are also devices for controlling radiators by means of an expansion body known, in which the expansion body is provided with an electrical heating device and automatically the circuit on or off. However, all of these devices only serve the purpose of that to open or close the controlling valve slowly and gradually. Lately is However, in many cases the condition is a closing organ from a distant one Manually or automatically, depending on a certain pressure or Temperature state suddenly to close or open completely.

In particular, this is the case with devices for actuating oil- or gas-heated central " heating boiler the case in which the ■ gas supply valve is opened suddenly must to avoid flashing back the heating flame. Also for remote control of electrical ones This sudden switch-off is indispensable for switches with large currents. In addition, this function ensures the greatest economy in the consumption of heating media.

The present invention is now a thermostatically influenced control element, which is closed by a known, electrically heated thermostat becomes, but at the same time after overcoming a sufficiently strong spring pressure that Control unit by a pawl ο. Like. Keeps closed until a second Thermostat the pawl is triggered and the valve opens suddenly will. This closing and opening of the valve can also be done by means of a special circuit diagram with corresponding contacts by one and the same thermostat.

The concept of the invention is shown in the drawings in an exemplary embodiment, namely shows

Fig. Ι a longitudinal section through the valve when closed,

Fig. 2 is a longitudinal section through the valve in the open state.

On the valve 1 with the spindle 2 is a

Claims (4)

The valve attachment 3 with the stuffing box 4 is screwed on. In the upper part of the valve attachment 3, a sleeve 5 slides, the interior of which with a return spring 6 and a Buffer spring 7 is filled. Both springs 6 and 7 are firmly supported against a Spindle 2 split-on plate washer 8. Reaches into the upper recess c / of the sleeve 5 a guide tube ίο, which is firmly connected to the lower base of the thermostat 11 is. In the upper cylindrical end cover of the thermostat 11 is a Heater 12 housed by wires 13 and 14 via a hand or by a thermostat 15 operated, changing switch 16__ conductive with a Power source is connected. There is a pawl on the side of the valve attachment 3 17, the nose 18 of which is in one direction with the lower extension of the sleeve 5. The pawl 17 actuates a spring contact 19, which the heating circuit of the Heating devices of the thermostat 11 interrupts. Another thermostat 20 with a heating device 21 and the lead wires 22 and 23 is on the side of the valve attachment 3 attached. The lower bottom of this thermostat 20 is through a pin 24 with the lever arm 25 of the pawl 17 in Link. Another spring contact 26, which is attached to the valve attachment 3, interrupts the circuit of the thermostat 20. The function of the valve is as follows: It is removed from the valve in one lying room when a certain temperature is reached by the thermostat 15 the contact 16 is closed, the current drawn from a current source flows through the lead wires 13 and 14 via the in In the open position of the valve, contact 19 in heating element 12 is still closed and heats it up. A slightly gasifying liquid in the interior of the thermostat 11 pushes the sleeve 5 down through the guide tube 10 and brings the valve in conclusion. The return spring 6 is compressed while the buffer spring 7, which is selected accordingly stronger, is only then slightly compressed, when the valve has already closed and the thermostat continues to expand. At the same time the pawl jumps into the position shown in Fig. Ι and holds the valve tightly closed. At the same moment the contact 19 is interrupted, and the radiator 12 is no longer powered, cools down, and the thermostat pulls out neither together, while the valve then remains closed. Only when removed by the temperature has fallen so far that the room thermostat closes. pulls together and closes the upper contact, the process is carried out as shown in Fig. 2 of sudden opening in the following way: The current is now from a power source to the radiator 21 of the thermostat 20 via the contact 26 which is still closed in the closed valve position. As a result, the heating element 21 is heated and expands in the same way Thermostat 20, the pin 24 of which presses on the lever 25 of the pawl 17 and this triggers. At the same time, the return spring pushes the valve spindle upwards and opens the valve. By opening the valve, i. H. when the sleeve 5 goes back, contact 26 is broken and the valve remains in the position shown in fig Position until the room thermostat 15 switches over again and the process starts again repeated. This means that electricity is only consumed during the short closing or opening period of the valve, during the rest of the time the whole system is de-energized. Instead of the valve, any other control element, such as a throttle valve, Slider, ventilation flap, electrical switch or the like, which is operated by the spindle will find use. The controller is thus for. can be used for a variety of purposes. By the perfect Completion of the control organ is, for example, to use the apparatus for heating purposes, greatest economy in the consumption of heating medium achieved. The manufacturing cost Such a control organ Hegen substantially below those of the previously known complicated, electromagnetic Adjusting devices. Any size of force can be exerted, depending on the Choice is made in the size of the two thermostats. It is therefore also possible valves or the like that are very difficult to operate. As a further advantage of the arrangement it should be emphasized that a separation of the impulse organs and control organs is possible at any distance, so that, for example, the impulse organ can be installed in a room in an apartment, but the control organ can be installed in the basement. ----- P Λ TEN TAK S VK Ü ClJ. K: ι. Electrically controlled valve with electrically heated thermostat for Control of heating and ventilation systems, characterized in that the closing and opening of the valve is carried out by a special thermostat. 2. Valve according to claim ι, characterized in that that the circuits of the two thermostats alternate through contacts after expansion opened or closed. 3. Valve according to claim 1 and 2, characterized in that the valve is held in the closed state after completion by a locking device until the second thermostat triggers this locking device. 4. Valve according to claim 1 and 3, characterized in that between Closing thermostat and valve spindle a buffer spring (7) is built in, which gives the valve the required closing pressure '. 1 sheet of drawings