FR2628310A1 - PRESSURE CHAMBER FOR DISHWASHER - Google Patents

Abstract

Pressure chamber for dishwashing machine, to control the water level in the main tank, made up of a compartment to which the water has access and to which is attached a second compartment separated by a wall which defines the water level to be checked and in which is located a reservoir for the accumulation of water which overflows from the partition wall of the two compartments, so that the lower part of the water inlet compartment communicates with a cylindrical cavity provided with ribs longitudinal to guide a float which closes, when the cavity is filled with water, an upper orifice which communicates with the compartment provided with the reservoir, while the upper wall of the water inlet compartment is provided with an orifice of overpressure control.

Description

-1- 1 The present invention relates to a pressure chamber for a machine

  wash the dishes which allow to obtain significant advantages compared to the bedrooms

traditional pressure.

  Some models of dishwashing machines have a pressure chamber for regulating the volume of water that will be contained in the filter bowl of the appliance so that the entry of water is interrupted by electromechanical means when the desired level of

the water is exceeded.

  In this way, as the filter bowl fills, the pressure chamber also fills until it exceeds a determined height, limited by an internal pipe of the chamber, and the water which overflows from the on the other side of the pipe floods a tank by exerting on the latter a determined pressure which is communicated to a pressure switch to ensure the interruption of the entry of water. This pressure chamber thus produced does not allow exact regulation of the water level and, moreover, at the time of emptying of the filter bowl, the latter also empties by siphon effect, but because of the permanence time in the latter of semi-solid residues, the latter can accumulate to the point of

shut it off.

  The pressure chamber also has a membrane to control overpressures that may occur. Thanks to the use of the pressure chamber * 30 according to the invention, the control of the water level is done by a fixed physical means, which prohibits any variation of the water level in the filter bowl. This gives greater security with regard to the quantity of water which comes into play for each washing, since it must be taken into account that if there is a greater quantity of water, the latter will have to be heated and we will use -2- a higher dose of soap, which will increase the cost

of the operation.

  The pressure chamber made of thermoplastic material has a total seal and it has a series of compartments. In this way the water enters a compartment, the lower part of which communicates with a cylindrical cavity inside which is located a float guided by a series of longitudinal ribs, so that the inlet of the water moves towards the high the float which then closes an orifice which communicates with the compartment provided with the tank in which the water collects and exerts a pressure which causes

  interruption of water entry.

  The two compartments in question are separated from each other by a wall which serves to control the level of the water, and consequently when the water which enters this compartment overflows above this wall, it enters

  in the reservoir which is closed by the float.

  When the filter bowl empties, the reduction in the water level lowers the float and allows the water to exit from the compartment which was closed by the latter, and therefore the fact that the outlet of the at the lowest point, the accumulation of semi-solid residues is more unlikely than when the evacuation of

water is made by siphon effect.

  To control overpressures, the upper wall of the compartment into which water enters directly has been provided with an orifice allowing the passage of water, which means that the installation of a membrane ceases to be necessary. the pressure chamber is provided with a connection intended for a safety solenoid valve. Other characteristics and advantages of the invention will be better understood on reading the description which follows of an exemplary embodiment and with reference to the drawing. annexed, in which: -3- 1 The single figure represents a view in longitudinal section of the pressure chamber in which one can see the compartments which are formed there, the cavity intended to receive the float, as well as the latter located in the cavity In this figure, and in accordance with the numbering adopted, we can see that in the pressure chamber is formed a series of compartments which constitute a kind of labyrinth. This pressure chamber is constituted by two bodies, one of which serves as a cover and the connection of which makes it possible to obtain a perfect seal. The pressure chamber 1 is formed by the compartment 2 which communicates with the water inlet orifice and the wall 4 of which is intended to mark the level 5 of the water which must be checked. The compartment 2 communicates with the cavity 6 through the opening 7, the cavity 6 being provided with ribs 8 which guide the float 9 and

being closed by the plug 10.

  The cavity 6 communicates with the compartment 11 by

  the orifice 12, which can be closed by the float 9.

  In compartment 11 is located the reservoir 13, the

  width is greater than that of chamber 1.

  The lateral pipe 14 is provided on its bottom with the connection 15 with the pressure switch, while the other lateral pipe 16 has on its bottom the connection with

a safety solenoid valve.

  On the upper wall of compartment 2 is

  formed the overpressure control orifice 19.

  Consequently, the chamber will be located so that the wall which determines the level of the water which has to be controlled is level with the level of the water which it is desired to obtain in the main tank of the washing machine. dishes. The water will penetrate through the orifice 3 in the compartment 2 by flooding the cavity 6 and forcing the float to move upwards to close the orifice -4- 12. When the water overflows from the compartment 2, it follows the pipe 18 to arrive at the reservoir 13 defined by the compartment 11, the orifice 12 being closed by the float 8, which means that it accumulates in this reservoir 13 until the pressure that it exercises acts on the

  pressure switch and closes the water inlet.

  When the water has to be removed, its level drops in compartment 2 until it starts to come out of the cavity 6, and the downward movement of the float 9 allows the water contained in the compartment to exit. 11 through the orifice 12, towards the cavity 6, and, from the latter the water, through the opening 7, the water arrives

at the outlet 3.

  The water comes out of compartment 13 under the effect of gravity, and not by siphon effect, carrying with it the semi-solid particles, which prevents their accumulation and the possibility of obstruction of the pipes.

from bedroom 1.

  The plug 10 and the. compartment 2 bottom wall can be slightly tilted

  towards the outlet to facilitate the exit of the water.

  To check the overpressures that may occur, the chamber 1 is provided with the orifice 19 located at the upper part of the compartment 2. Also, the pressure chamber is provided with the connection 17 of

the safety solenoid valve.

  Float 9 could be replaced by a

  non-return device or a solenoid valve.

  Of course, various modifications can be made by those skilled in the art to the devices or methods which have just been described solely by way of non-illustrative example.

  limiting without departing from the scope of the invention.

-5-

Claims (1)

1 CLAIM   1.- PRESSURE CHAMBER FOR WASHING MACHINE   TABLEWARE, intended to control the level of water in the main tank of various. models of dishwashing machines, which has a compartment into which the water penetrates and which communicates with a second compartment attached to it, which is provided with a reservoir intended to receive the water, which by the pressure exerted on a pressure switch produces the interruption of the entry of water, the level of water which must be controlled being defined by the wall which separates the two compartments, characterized essentially in that the compartment to which the water communicates directly at its lower part with a cylindrical cavity, which is closed at its lower part by a plug and communicates at its upper part with the compartment provided with the reservoir, so that water accumulates there which overflows from the compartment to which accesses water, while in the cylindrical cavity is located a float guided by longitudinal ribs, which closes the upper opening when water floods this cavity, being provided on the upper wall of the compartment t to which the water directly accesses, an overpressure control orifice, the pressure chamber being provided, in addition, a safety solenoid valve.