DK162794B - SANITATE BATTERY BATTERY - Google Patents

Description

in

DK 162794 B

The invention relates to a sanitary mixing battery according to the preamble of claim 1.

A mixer battery of this kind is disclosed in DE Publication 3,430,176.

The temperature control in this mixing battery is effected by a sensor measuring the temperature of the mixing water, after which an electronic control device from the comparison with a set desired temperature provides a setting size for the valve operation.

10 This type of temperature control is known technique in connection with air fittings outside the sanitary area.

In the known mixing battery, the valve device and the associated valve drive are substantially provided, as explained below.

15 The cold water inlet and the hot water inlet are each provided with an inlet valve. The operation of the inlet valves is provided by a setting motor which, depending on the setting signal from the control device, simultaneously operates both valves in opposite directions 20. This means that during the mixing mode in a final position there will be one valve which is closed while the other valve is opened. A simultaneous complete opening or complete closure of both inlet valves is excluded.

25 The inlet valves and drive are suitable for temperature control only. Thus, a flow rate adjustment is not possible. Between each of the inlet valves and the mixing chamber, a check valve is provided for each feed to prevent alternate entry of hot water into the cold water feed and vice versa.

These non-return valves are extremely important for the reliability of known mixing batteries. Since the shut-off valve for closing the drain is located behind the mixing chamber, when mixing position 35 of the inlet valves, when the mixing battery is not used, a short circuit between hot water and cold will be provided.

DK 162794 B

water feeder. Such an unacceptable short circuit must be prevented by the non-return valves. This solution has the disadvantage that the reliability is affected by liming and soiling of the non-return valves.

In the prior art, in the prior art, a valve is provided for controlling the flow rate and an associated stepper motor. The stepper motor is controlled by a control unit so that the control valve is opened according to the desired flow rate.

10 After the flow rate control valve, the mixing water channel is divided into two waterways which can be closed by solenoid valves. In this way, the mixing water can be distributed to two different consumers as desired.

In relation to the prior art, the object of the present invention is to provide an electronically controllable sanitary mixing battery which provides in a simple manner an accurate and rapid temperature and flow rate control, and which is only slightly susceptible to interference and also from a safety technical point of view is completely reliable if, for example, the electric power supply fails.

The stated object is achieved with a mixer battery of the kind initially referred to, which according to the invention is characterized by the design according to the characteristic part of claim 1.

In the invention, both the mixing water temperature as well as the flow rate of the mixing water can be controlled by hot water and cold water inlet valves, and both the inlet valves are provided with an electromechanical, electromagnetic or hydraulically driven adjusting valve, through which the inlet valves can be opened by the inlet valves. of the inactive setting steps.

In this embodiment, the number of valves to be adjusted relative to the prior art is limited to including only two inlet valves such that the number of valves

DK 162794 B

of moving parts is diminished. Since the shut-off of both inlet channels in the structure provided by the invention occurs before the mixing chamber, it is not necessary to incorporate non-return valves whose operation is easily disrupted.

Due to the restriction to two inlet valves, the opening ratio of the valves has a direct influence on the mixing temperature and at the same time also on the flow rate.

In known valve geometry, in addition to an adjusting means through regulating technically simple subtraction, and derived proportional adjustment size, in addition to the possibility of keeping the temperature constant, there is also an opportunity to keep the flow rate constant at a predetermined value without measuring the instantaneous flow rate. . In providing energy storage devices, the valves, e.g. in the event of a power failure, quickly close. This prevents, for example, that a wash basin overflows or that the person using the sanitary mixing battery is flushed by the hot water. Incidentally, the cold and hot water valves are opened and closed electromechanically by a simple temperature measurement in the mixing water by circumventing a determination of the flow rate. The flow rate of the mixing water is thereby kept constant. As the flow rate of cold and hot water, as is well known, depends not only on the opening angle of the valves, but also on the pressure difference between the inlet pressure and the dynamic pressure at the valve outlet, it is a prerequisite for the mixing battery provided by the invention that the inlet pressure is time-wise. kept constant.

Advantageous further embodiments of the invention are disclosed in the subclaims.

The temperature measurement is provided by a sensor located in the mixing chamber. The temperature is preferably measured at the exit of the mixing chamber to exclude inaccuracies produced by insufficient mixing 4

DK 162794 B

of the streams of water.

The electromechanical adjusting means at the two valves may be electric motors, such as electric motors. step motors, direct or alternating current motors, or solenoid valves may be provided, thereby allowing an analog adjustment of the opening cross sections of the valves. Solenoid valves may also be provided which are operated through an adjustable pulse-pause ratio, thereby providing a quasi-analog mode of operation, or hydraulic actuators may be provided. Preferably, for closing the valves, energy storage means, e.g. torsion springs, or also electromechanical energy stores, such as accumulators, capacitors or electromagnets, thereby resetting the inactivated setting means. In the event of failure or breakdown of the drive means of the adjusting means, both valves are forcibly reset through the associated energy stores.

To prevent scalding, the hot water valve closes more quickly, for example, because the reset energy in the hot water valve's energy storage is higher than the reset energy in the cold water valve's energy storage.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawing, in which: FIG. 1 is a sectional view of a sanitary mixing battery and an adjusting member; FIG. 2 is a wiring diagram showing the discharge of set sizes for operating the valves.

In the embodiment shown in FIG. 1 illustrates an embodiment of a sanitary mixing battery provided by the invention, a valve 1 and 2 for cold water and hot water supply 3 and 4. Valves 1 and 2 are provided with two adjacent ceramic disks 1,1 'and 2,2'. which can be rotated in known manner. For example, the ceramic disks 35 are driven by each of their electric motors 5 and 6.

5

DK 162794 B

In this case, the closing of the valves 1 and 2 is provided by each of the torsion springs 7 and 8, which resets the inactivated electric motors 5 or 6.

In connection with the valve outlets, a mixing chamber 9 is provided, in which outlet area at least one temperature sensor 10 is provided.

For each valve 1 and 2 there is provided a motor 5 and 6, in connection with which the setting temperature is controlled by controlling the ratios of the opening angle of the two valves for constant flow of mixed water.

For example, if the temperature measured at the outlet of mixing chamber 9 is too high, then the hot water valve is closed, the cold water valve being simultaneously opened. The adjustable setting sizes for opening at any time, respectively. closure of the two valves is derived from an electronic circuit.

In the embodiment of FIG. 2, the temperature measured in the mixing chamber 9 is compared with the temperature preset through 11 in the subtraction circuit 12.

Through a PID control circuit (proportional-integral-differential control circuit) 13, a set size (* 1 for operating the valve 1) is set from the control deviations. The set size a2 is provided based on the set size and one proportional to the total flow rate Q flow through subtraction (flow_0: l) At the output of the subtraction circuit 14.

Claims (7)

A sanitary mixing battery for controlling one predetermined mixing temperature and flow rate of mixing water with a hot water and a cold water supply valve (1,2) and a mixing water outlet, the valves (1.2) being electronically controlled over setting means (5,6), characterized in that both the mixing water temperature and the flow rate of the mixing water can be adjusted by the hot water and cold water supply valves 10 (1,2), that each of the supply valves (1,2) is provided with an electromechanical, electromagnetic or hydraulically driven adjusting means (5,6), which operates by opening the supply valves (1,2) and the supply valves (1.2) can be closed by energy storage means (7,8) during resetting of the inactivated setting means (5,6). Sanitary mixing battery according to claim 1, characterized in that the energy storage means are (7,8) are spring elements, preferably torsion springs. A sanitary mixing battery according to claim 1, characterized in that the energy storage means (7, 8) are electrical storage means, such as accumulators, capacitors or inductive elements. Sanitary mixing battery according to claims 1-3, characterized in that at least one temperature sensor (10) is provided in the mixing chamber (9), preferably in the region at the outlet opening of the mixing chamber (9). Sanitary mixing battery according to claims 1-4, 30, characterized in that a control circuit (12, 13, 14) is provided for controlling the ratio of the opening angles in the two valves (1, 2), from which, after comparing the current temperature in the mixing water with the preset temperature, through a control algorithm (13), the setting values of the two setting means (5, 6) are derived. DK 162794 B Sanitary mixing battery according to claim 5, characterized in that, in order to maintain the flow rate, one of the set sizes of a subtraction circuit (14) can be deduced from a size 5 proportional to the preset flow rate. Sanitary mixer battery according to claim 5 or 6, characterized in that a PID control circuit (proportional-integral-10 differential control circuit) (13) is provided as control algorithm.