FR2561797A1 - DEVICE FOR SAFETY AGAINST OVERFLOWING AND LEVEL REGULATION FOR HOUSEHOLD APPLIANCES WITH WATER CIRCULATION - Google Patents

Abstract

A SAFETY DEVICE AGAINST OVERFLOWING AND LEVEL REGULATION FOR HOUSEHOLD APPLIANCES WITH WATER CIRCULATION, DISHWASHER AND WASHING MACHINES, IN PARTICULAR, INCLUDES, IN SERIES WITH THE PROGRAM-CONTROLLED ELECTROMAGNETIC INLET VALVE, A VALVE OF ' STOP THAT A PERMANENT MAGNET KEEP IN THE OPEN REST POSITION AND WHICH CAN BE CLOSED BY A MANOMETRIC CAPSULE CONNECTED TO AN AIR TRAP CHAMBER WHICH MONITORS THE LEVEL OF LIQUID IN THE TANK OF THE APPLIANCE AND CAN BE FILLED BY A TANK -WATER SPILL AVAILABLE UP TO THE LEVEL OF LIQUID, AND DRAINED BY A SIPHON. THE SHUT-OFF VALVE 28, WITH ITS MANOMETRIC CAPSULE 29 AND THE AIR TRAP CHAMBER SET TO THE NORMAL FILLING LEVEL 19 OF TANK 1, SERVES FOR LEVEL REGULATION, AND IS MONITORED BY THE ELECTROMAGNETIC INTAKE VALVE 7 CONTROLLED BY A TIMER OF THE PROGRAM CONTROL DEVICE.

Description

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  Company called: BOSCH-SIEMENS HAUSGERATE GMBH Invention of Ernst STICKEL and Helmut JERG Priority of a patent application filed in Germany on March 23, 984 under the number P 34 10 826.2 Device for overflow safety and level regulation for The present invention relates to a safety device against overflow and level control for household appliances with water circulation, especially for dishwashing machines and washing machines, comprising , in series with the valve

  program-controlled electromagnetic intake valve, a

  that a permanent magnet holds in the open rest position and which can be closed by a manometric capsule connected to a chamber

  air trap which monitors the level of liquid in the tank of the appli-

  the same and can be filled by a spillway arranged at

  level of liquid, and drained by a siphon.

  The dishwashing machines available on the market are equipped with a safety device according to patent DE 31 14 664. According to this safety device, when the household appliance operates without

  problem, the stop valve is in the open rest position. THE SUPPLY TERMINAL

  water from the tank of the apparatus is effected by opening the

  electromagnetic intake valve controlled by the control device

  the device. When the normal filling level is reached, a service level controller closes the valve

electromagnetic intake.

  For this purpose, a device is installed on a side wall of the vessel.

  level control device having a plastic housing which surrounds a first air trap chamber for the normal level, a second air trap chamber for a safety level and a peripheral chamber where drop lines serve as siphons to drain the two chambers air trap. A connecting pipe connects the peripheral chamber to the tank or to a tank drain tank located at the bottom of the device, or to the system for emptying the tank. We have planned between the peripheral chamber and the trap rooms

  separating walls with sidewalls at the height of

  normal filling level or tank safety level. At the first

  The air trap chamber, which responds to the normal fill level, is connected to the aforementioned service level controller (pressure controller), which causes the electromagnetic inlet valve to close. At the second air trap chamber, which responds to the (higher) safety level, is connected the pressure capsule of

the shut-off valve.

  In the event of a failure of the service level controller or if the electromagnetic intake valve does not close, the water level in the tank reaches the safety level, where the second air chamber

  is fed, and a membrane (which is indirectly under

  liquid) of the pressure cap of the shut-off valve sufficiently removes the permanent magnet therefrom from its armature in

  the valve housing for the shut-off valve to block the water supply.

  By emptying the tank, the membrane is no longer pressed into

  sion, so that the permanent magnet returns to its initial position, then urging the armature into the stop valve and causing this

  last to its open position. To also detect the defects of

  the machine is sealed, the bottom of the machine is equipped with a

  for the leaking water in which a diver who is

  coupled indirectly to the membrane of the manometric capsule of the

  stopping pape so that, during the production of leaking water, the lifted float acts via the membrane on the magnet

  permanent, and close the shut-off valve.

  The present invention aims to simplify the configuration of a safety device against overflow and regulation.

level of this type.

  This object is achieved according to the invention by the fact that

  stop valve, with its manometric capsule and the air trap chamber set at the normal filling level of the tank, is used for level control, and this stop valve is monitored by the valve

  electromagnetic intake controlled by a timer of the

tif of program control.

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  - 3 - As the invention provides to use for level regulation

  the mechanically actuated stop valve by means of a permanent magnet

  while the safety against overflow is ensured by the program-controlled electromagnetic inlet valve, whose switching can be superimposed in time over that of the shut-off valve, without compromising the accuracy of the control. level

  and safety against tank overflow greatly simplify-

  the entire device, by removing the second air chamber reacting to the safety level, with its tank and siphon, as well as

  that the service level controller with its contacts and connections (se-

  the invention is the manometric capsule of the shut-off valve which

ensures its function).

  According to an additional characteristic of the invention, a float

  placed in a collecting tray for the water of leakage which is provided

  the same is coupled at least indirectly to a diaphragm of the pressure capsule, and the appearance of leakage water causes the shut-off valve to be closed via the float, the diaphragm and the

manometric capsule.

  Another advantageous embodiment of the object of the invention is

  see that the edge-weir of the air trap chamber ac-

  coupled to the manometric capsule of the shut-off valve is arranged to

  height of the normal filling level of the tank, that the

  kept in the open position by the permanent magnet can

  through the air trap chamber, be closed by the

  water at the normal filling level in the tank and the

  of the resulting manometric capsule, that in the temporisa-

  of the program control device is memorized a restart time of

  the opening of the electromagnetic intake valve which corresponds to

  at least the water flow required to fill the tank to its

  cal, and that following the start of a drain and / or circulation pump, the lowering of the water level

  the stop valve in the open position, by the action of the magnet

  nent. Finally, a further feature of the subject of the invention is that the siphon elbow provided for draining the chamber -4 - air trap is disposed at the level of the normal filling level of the tank, and serves simultaneous edge-weir to fill the room to

air trap.

  The following description explains the invention using examples

  embodiment shown in the accompanying drawing. This drawing shows: - in Figure 1 a block diagram of a dishwasher equipped

  a safety device against overflow and regulation of nil-

calf according to the invention; and

  in FIG. 2 the detailed representation of the control tank

  level between the tank and the shut-off valve, with the chamber

  air trap, spillway and siphon.

  On the partially illustrated dishwashing machine is disposed in the bottom of the tank I a drain pan 2 to which are connected

  a drain pump and a circulation pump (not reproduced). Au-

  above the softener consisting of a salt container 3 and a sample of

  ion generator 4 is a storage tank 5 placed on a wall

  side of the tank and the bottom of which communicates with an evacuation pipe.

  6 with the salt container. The dishwasher is connected through

  an electromagnetic inlet valve 7 to an inlet pipe

  8. From the electromagnetic inlet valve 7, a fresh water pipe 9 leads via a free flow section which is in the storage tank 5 and a water valve

  18 to the ion exchanger 4, where a line 11 ensures a

  to the drain pan 2. A pipe connection 13, 11

  an overflow 12 of the storage tank 5 to the tank.

  In the embodiment shown, the salt container 3 pos-

  a lockable filler neck 14 and an air hose are provided.

  15, and a regeneration valve 17 is placed in the line 16.

  connecting this container to the ion exchanger 4.

  In order to monitor a normal filling level 19, a level regulating tank 21 is connected via a tubing 20

  to the tank I or to the evacuation tank 2 of the latter; this reservoir

  takes an air trap chamber 22, a peripheral chamber 23, a separating wall 24 provided with a spill-over edge 25 situated at the level of the normal filling level, and a siphon 26 capable of emptying the trap chamber

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  -5- air. The air trap chamber 22 is connected via a control line 27 to a stop valve 28 which is placed in the inlet pipe 8 downstream of the electromagnetic inlet valve 7,

  and which is described in more detail in DE 31 14 664.

  The overflow and level control safety device works as follows:

  When the appliance is working properly, the

  end 28 is opened by the action of its permanent magnet. The water supply to tank I is made by opening the inlet valve

  electromagnetic actuator 7 controlled by the program controller.

  When the normal filling level 19 is reached in the tank, it is

  produced in the level 21 control tank which is in communi-

  with the latter the overflow of a small quantity of water

  by the spill-over edge 25, to go into the air trap chamber 22.

  A small amount of water is enough to create in the air trap chamber

  22 a pressing pressure through the conduct of com

  Means 27 a pressure capsule 29 of the stop valve 28 so that the stop valve is moved to its closed position,

  and the continuation of the arrival of prevented water.

  At the end of its predetermined opening time, the valve

  electromagnetic inlet 7, controlled by a timer of the dis-

  positive control of the device, is also closed.

  Following the emptying of the tank and / or the start-up of the circulation pump, the water level is lowered and the siphon 26 can come into action to empty the air trap chamber 22. which removes the pressure to which the pressure capsule 29 is subjected and causes

  the return of the stop valve 28 to its open position. This mode of

  shut-off, mechanical and magnet valve

  handle, reduces the risk of blockage of the valve. Moreover, according to the predetermined characteristics for the regulating tank of

  level and opening time of the electromagnetic intake valve

  7, it is possible, following the start of the circulation pump,

  tion and when the stop valve 28 is opened again, perform

  a dynamic filling of the tank.

  If, as a result of a disturbance, waterlogging of the control tank

  For example, the water level in the tank is not interrupted when the tank is reached.

  normal filling level 19, water continues to enter the

  until the opening time of the electromagnetic intake valve 7 has elapsed. This opening time can be predefined

  completed so that the excess filling of the tank

  normal level is insignificant.

  In order for the overflow safety device to be

  level regulation also makes it possible to control

  the integrity of the tank or other household appliances in the

  which circulates water, leakage water can be collected in a tray

  collector located at the bottom of the device. In this tray is

  placed a float that can be coupled to the pressure cap 29 of the stop valve 28 so that it causes the closing of the stop valve in the presence of a small amount of leakage water

in the collecting tray.

  Instead of the spill-over edge 25 of the separating wall 24, the separating wall can be raised and the elbow 30 of the siphon 26 to be arranged.

  height of the normal filling level 19, this siphon then serving

  at the same time from the edge-weir when water enters the tank 1.

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Claims (4)

claims   1. Safety device against overflow and regulation of ni-   for water-cooled household appliances, in particular for dishwashing machines and washing machines, comprising, in series with the electromagnetic valve controlled by a program, a shut-off valve permanent magnet.   open rest position, which can be closed by a manoeuver   metric connected to an air trap chamber that monitors the level of   liquid in the tank of the device and can be filled by an edge-   spillway arranged at the level of the liquid level, and emptied by a siphon, characterized in that the shut-off valve (28), with its manometric capsule (29) and the air trap chamber (22) set at the level of normal filling (19) of the tank (1) is used for level control,   and that the shut-off valve (28) is monitored by the intake valve   electromagnetic engagement (7) controlled by a timer of the device from program control.   2. Device according to claim 1, characterized in that a flow-   placed in a collecting pan for the leakage water provided   the apparatus is coupled at least indirectly to a membrane of the cap-   pressure gauge (29), and the appearance of leakage water   setting of the shut-off valve (28) via the float,   the membrane and the manometric capsule.   3. Device according to claim 1, characterized in that the edge   weir (25) of the air trap chamber (22) coupled to the pressure capsule (29) of the shut-off valve (28) is arranged at   the normal filling level (19) of the tank (1), that the   end kept in the open position by the permanent magnet can, by means of the air trap chamber, be closed by the   rise of water at the normal filling level in the tank and soil   of the resulting manometric capsule, that in the   the controller of the program controller is stored a delay time of opening of the electromagnetic intake valve (7) which corresponds at least to the flow rate of water required to fill the tank to its   normal level, and that following the start of a vacuum pump,   - 8 - and / or circulation, the lowering of the water level causes the   return of the shut-off valve to the open position, by the action of the permanent mantle.   4. Device according to any one of claims 1, 2, 3, characterized   characterized in that the bend (30) of the siphon (26) provided for draining the chamber   air trap (22) is arranged at the level of the normal filling level.   (19) of the tank (1), and serves simultaneously as an edge-weir to replace fold the air trap chamber.