DK148457B - EQUIPMENT FOR ENERGY SAVING BY HEATING OR COOLING ROOMS - Google Patents

Description

148457

BACKGROUND OF THE INVENTION The present invention relates to an energy saving device for heating or cooling a room, which equipment comprises at least one room thermostat, at least one window switch that monitors a window's closing state, and a control device such as a heating resistor and / or a Peltier system. element which displaces the reaction value of the room thermostat with respect to the room temperature, and wherein the control device is connected to a low voltage source through the window switch.

Austrian patent specification 341156 discloses a device of this type in which each contact associated with a door or window in a room affects a control unit which includes a heating element as soon as a door or window is opened. The heat generated by the heating element thus activated triggers the room thermostat, whose temperature sensor perceives the heat generated as an elevated room temperature. The thermostat thus interrupts the energy supply to the premises heating system and this interruption is maintained as long as the door or window is open.

Admittedly, the energy savings achieved in this way can be of importance in some cases, for example, if a door 20 or a window is unintentionally open or is left open for a long period of time. Under normal conditions, ie. however, when windows are opened to vent a room, or when a door is opened to access or from the room, the actual energy savings achieved are quite low, as such openings of doors or windows are of a short duration.

On the other hand, an energy saving of significantly greater importance is achieved by changing the room temperature when a room is left unused for an extended period of time, for example overnight or even longer.

30 Austrian Patent Specification No. 297,869 discloses a device aimed at such energy saving and which causes an interruption of the energy supply to a heater in a room as soon as a door to the room is locked from the outside.

However, it is unfortunate that the energy supply is interrupted, thereby causing a very disparate heating of the various rooms or rooms, for example in unused and used apartments in a property. Thus, if normally heated compartments 2 U8A57 adjoin spaces that are used only at intervals, then large temperature differences occur over the partitions, and this can, in the first place, cause condensation of moisture and consequent damage, such as fungal and mold attacks. In addition, the efficiency of heating in the house or property as a whole is significantly degraded due to the large temperature differences inside the house or property.

In the first known control equipment, the same drawbacks, viz. risk of moisture damage as well as low overall efficiency, ”* 0 could also occur, since even in this known equipment a longer duration interruption occurs when a window or door is left open for a longer period of time.

The equipment according to the invention, which is characterized by the features of claim 1, alleviates these disadvantages and at the same time gives rise to significant energy savings. The equipment is thus based on a differential control, the opening of a window exerts a stronger effect on the thermostat than the locking of a door, but in none of the cases does the complete supply of energy be interrupted. This is a consequence of the special connection of the door lock switch 20 to the equipment according to the invention. In other words, openings of windows of known mite are taken into account, however, there is no complete interruption of the energy supply, and in addition, a minor change is caused when a door is locked and a room is left unused. through 25 longer periods of time.

In connection with the energy savings achieved with the equipment according to the invention, it should be remembered that the energy consumption does not depend linearly on the room temperature. Thus, in a heating system equipped with an equipment according to the invention, significant energy savings can be achieved even if locking the door to the room in question only causes a lowering of the room temperature by a few degrees, for example from 22 ° C to 18 ° C. . At the same time, such a decrease in temperature does not give rise to a significant temperature difference in relation to adjacent rooms, and the risk of moisture damage to 35 partitions is therefore negligible.

With an equipment according to the invention, the room temperature can be lowered during the entire period during which the door is locked, and therefore the room is not used 3 148ΛΒ7! a certain extent, or by cooling, a higher room temperature can be allowed, and in both cases considerable energy savings can be achieved, especially when the room is not used for a long time. The extent of the deviation from the temperature set on the thermostat 05 is suitably chosen such that the set temperature pi can be obtained again in a relatively short time, or so that, at lowered or elevated temperature, reasonable conditions exist for a person entering the room. In connection with heating, for example, a lowering 10 of approx. 6 K with externally locked doors proved to be appropriate, whereas a temperature rise by cooling of approx. 3-6 K may be appropriate depending on the room thermostat setting. In the case of cooling, in addition to this, the advantage is obtained that the temperature jump between the possibly very high outside temperature and the air-conditioned room is reduced.

If a window is opened, the switching point of the room thermostat is displaced relatively far, for example 10 K or more, whereby the energy supply to the room heating or cooling is greatly reduced.

In the following, the invention will be described in more detail with reference to the drawing, in which Figures 1 and 2 show coupling diagrams of two different embodiments of the invention.

A device 2 enables or enables energy supply for heating and / or cooling and is controlled by a room thermostat 1 or 1 *.

The device 2 may, for example, be an electrically operable valve for a hot water or steam heating, the blower motor for an electric furnace, a heat pump or a cooling unit, respectively. an air conditioner, or the device may be a relay that controls equipment of this type.

The room thermostat 1 or 1 'comprises a thermally releasable contact lock 3, which opens or closes a switch 4 corresponding to the set temperature value in the event of exceeding or below this set value. The contact lock can, of course, be replaced by a corresponding electronic coupling that responds to adjustable temperatures, in which case the switch 4 is suitably constructed as an electronic switch.

In the embodiment of Figure 1, two heating resistors 5, 5 '1 are provided with the room thermostat, and a Peltier element 6 is placed close to the contact luminaire 3, and thus it is possible to change the temperature in the immediate vicinity of the contact luminaire and thus to change the switch-on point from the actual room temperature, as soon as an auxiliary DC voltage U1 is connected.

The heating resistor 5 is connected to a switch 8 through a double-pole switch 7 or its one contact line, and the switch 8, which monitors the locked state of a door, is closed when the door is locked. A locking device suitable for this purpose is described, for example, in Austrian patent specification 297869 in which the switch is operated by a releasable part of the door lock, for example a bolt or a releasable trap. In principle, it is not necessary to arrange a switch operation by means of a releasable part of the door lock-15. Thus, locks are known which, by means of corresponding parts and possibly by fixing lock parts, and subsequent operation of the case, can only be unlocked by closing the door, and which can then only be unlocked again by a key. In such cases, for example, the change in position of the case relative to the locking parts present in the locking position can be utilized to operate a switch built into the lock.

If the switch 8 or a parallel coupled group of door monitoring switches is closed, the heating resistor 5 is coupled to the auxiliary voltage U1, thereby heating the environment of the contact lock 3, thereby displacing its switching point downward from the actual room temperature.

The second heating resistor 5 ', which has a lower resistance value than the resistor 5 and therefore gives more heat power than the resistor 5, is connected to a switch 9 or a group 30 of parallel-coupled switches 9 through the second contact line of the switch 7, and the switches 9 are closed when the associated window is not closed. Therefore, if a window is opened, the heating resistor 5 'is connected to the auxiliary voltage U', thereby heating the contact lock environment more strongly than was the case by means of the heating resistor 5. The contact point 3 of the contact lock is therefore lowered further in relation to the room temperature than was the case at the door lock.

The invention, however, is also applicable to air conditioning when cooling is performed. In that case, the switch 7 or 7 'is simply switched. Thus, in the case shown in Figure 1, the auxiliary DC voltage U1 is applied directly to the Peltier element 6, 61, 05 when one of the switches 9 is closed due to the associated window being opened. The soldering point 6 is located close to the contact latch 3, whereas the second soldering point 61 is kept at a fixed temperature or a temperature which changes only slowly, for example at room temperature, and this can be done, for example, by the soldering point 61 being placed in a block of well-heat conducting material which is exposed to room temperature. The polarity of the auxiliary voltage U 'is chosen such that the soldering point 6 and thus also the surroundings of the contact latch 3 are cooled, so that the switching point of the contact latch is displaced upwards relative to the actual room temperature.

15 On the other hand, if the switch 8 is closed, the Pettier element 6, 61 is placed below the voltage falling over the resistor 11 in the voltage divider 10, 11, and further one is inserted. diode 12 which, at closed switch 9 and correspondingly set switch 7, blocks a current over resistance 11. The cooling effect of solder 6 is therefore reduced due to the reduced voltage and the switch-on point of contact lock 3 is therefore set less strongly than at closed switch 9 or open window.

The embodiment of Figure 2 differs essentially only from the embodiment of Figure 1 in that the switch 8 or more 25 switched switches which monitor the closed state of a door are connected to a terminal of the auxiliary voltage U 'through a resistor 51 and are provided only. with a common wire leading from the thermostat 1 'to the switches 8 and 9. The heating resistor S1 can be coupled to the auxiliary voltage by each of the switches 8 30 or 9, but the different influence of the switch-on point of the contact lock 3 in relation to the room temperature is given. of the resistor 51 engaged in front of the switch 8.

When the switch 7 ', which may be designed as a single pole, is set for cooling operation, a closed circuit 8 results in a voltage divider formed by the resistor 51 together with the resistor 11, in which case the Peltier element 6, 61 is driven with the over the resistance 11 decreasing voltage. The cooling effect of solder 6 is therefore less than is the case when one of the switches 9 is closed and the full auxiliary voltage U 'is above the resistor 11.

Different changes are of course possible. For example, the Peltier elements can be omitted in the case of installations which only know heating work. Similarly, the heating resistors can be omitted in the case of installations which work exclusively with cooling. Furthermore, it will also be possible to provide the room thermostats with two Peltier elements with different cooling effect, for example due to different material combinations, 10 and to keep the circuits controlled by the switches 8 separate from the circuits controlled by the switches 9. In this case, it will also be possible to feed the heating resistors with alternating voltage, for example with mains voltage, and use only DC voltage for the Peltier elements.