Input system for liquid chemicals

Abstract

An input system configured to input one or more liquid chemical products into one or more washing devices (60A to 60D) includes at least one inlet hydraulic duct (1500, 2500) and at least one outlet hydraulic duct (1600, 2600) connectable to a water supply network (1200), and one or more mixed hydraulic ducts connected between at least one inlet hydraulic duct (1500, 2500) and at least one outlet hydraulic duct (1600, 2600), each having its own solenoid valve (1230A to 1230F, 2230G to 2230J), with each of the input devices (1240A to 1240F, 2240G to 2240J) for the one or more liquid chemical products located downstream thereof. At least one outlet hydraulic conduit (1600, 2600) is similarly connected to the inlet hydraulic duct (3500) of the distribution unit (3000). The distribution unit (3000) includes one or more distribution solenoid valves (3230A to 3230D), each located in its respective hydraulic distribution duct connected to the corresponding cleaning device. The feeding system further includes an electronic processing unit (1130) configured to be operably connected to one or more cleaning devices (60A to 60D), an inlet flow meter (1220) located in at least one hydraulic duct (1500, 2500), and an outlet flow meter (2260) located in at least one outlet hydraulic duct (1600, 2600). The electronic processing unit (1130) is operably connected to an inlet flow meter (1220), one or more solenoid valves (1230A~1230F, 2230G~2230J) of one or more hydraulic mixing ducts, an outlet flow meter (2260), and one or more distribution solenoid valves (3230A~3230D). The electronic processing unit (1130) is configured to receive flow rate values ​​measured by the outlet flow meter (2260) and the inlet flow meter (1220), and to measure and control the amount of one or more liquid chemical products to be introduced into one or more washing devices (60A~60D) based on the measured flow rate values.

Description

Technical Field

[0001] The present invention relates to a dosing system configured to dose one or more liquid chemical products in one or more washing devices, wherein the one or more liquid chemical products are mixed with a diluent, for example water, and supplied together with the diluent in each of the one or more washing devices, that is, the present invention makes it possible to control the amount of each of the dosed one or more liquid chemical products in an accurate, simple, reliable, highly efficient and economical manner.

Background Art

[0002] In the following description, reference is mainly made to application examples of the dosing system according to the present invention in the field of industrial or domestic washing devices, particularly for clothes and / or linen (for example, industrial or domestic washing machines) and for tableware and / or cooking utensils (for example, industrial or domestic dishwashers). However, it should be noted that the dosing system according to the present invention is applicable in any other technical context where the amount of one or more liquid chemical products to be mixed with a diluent, for example water, is always within the scope of the present invention defined by the appended claims, such as in the field of water treatment.

[0003] Furthermore, in the remainder of the present description, reference is mainly made to application examples of the dosing system according to the present invention which comprises a dosing or mixing device based on the Venturi effect and wherein the diluent consists of water. However, it should be noted that the dosing system according to the present invention may comprise different dosing or mixing devices, for example a dosing pump, and / or the diluent may also be different from water, while always remaining within the scope of the present invention defined by the appended claims.

[0004] In the field of cleaning equipment, it is known that liquid chemical products stored in containers such as bags or cans need to be mixed with a diluent, generally water, in precise amounts, and that this mixture of water and liquid chemical products needs to be supplied to the cleaning equipment. In this regard, cleaning equipment such as washing machines or dishwashers typically operate according to one or more cleaning programs or formulations that include a series of steps, in which different liquid chemical products may be introduced into the cleaning equipment in mutual and / or different amounts at various stages in which they are mixed with water.

[0005] In particular, fluctuations in water pressure can have unpredictable effects on the properties of mixtures of liquid chemicals and water, making precise control of the amount of liquid chemicals added complex and difficult. This complexity and difficulty increases in systems with multiple cleaning devices.

[0006] In the prior art, several solutions have been developed to control the amount of liquid chemicals added. For example, Patent Document 1 describes an add-on system in which the add-on period of a chemical product is adjusted based on the pressure of the diluent before mixing, while Patent Document 2 describes an add-on system in which the add-on amount is adjusted based on frequent recalibration, the use of a peristaltic pump, the use of a capacitive device to confirm the presence of the chemical in the flow leading to the washing machine, and the use of a single flow meter placed upstream of the chemical mixing device.

[0007] However, conventional solutions have several drawbacks.

[0008] Firstly, because their control is affected by pressure drops within the water pressure pipe and the viscosity of the chemical products, they do not allow for precise control of the amount of liquid chemical products introduced into the cleaning device.

[0009] Furthermore, conventional solutions are often complex, unreliable overall, and require frequent calibration, resulting in significant manufacturing, installation, and / or maintenance costs. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] European Patent Application Publication No. 3462271 [Patent Document 2] European Patent No. 0403296 [Overview of the Initiative]

[0011] Therefore, an object of the present invention is to enable accurate, simple, reliable, highly efficient, and economical control of the amount of each of one or more liquid chemical products mixed with a diluent, for example, water, and introduced into one or more washing devices.

[0012] A specific object of the present invention is an input system configured to input one or more liquid chemical products into one or more washing devices, the input system comprising at least one inlet hydraulic duct and at least one outlet hydraulic duct configured to be connected to a water supply network, and one or more mixed hydraulic ducts connected between the at least one inlet hydraulic duct and the at least one outlet hydraulic duct, each having its own solenoid valve. Downstream of each solenoid valve are respective input devices configured to input each of the one or more liquid chemical products as a diluent flows into the hydraulic mixed duct, and at least one outlet hydraulic duct is similarly connected to the inlet hydraulic duct of a distribution unit. The distribution unit comprises one or more distribution solenoid valves, each of which is located downstream of the distribution solenoid valve in its respective hydraulic distribution duct connected to the corresponding washing device of one or more washing devices. The feeding system further includes an electronic processing unit configured to be operably connected to one or more cleaning devices, an inlet flow meter located in at least one inlet hydraulic duct upstream of one or more hydraulic mixing ducts, and an outlet flow meter located in at least one outlet hydraulic duct downstream of one or more hydraulic mixing ducts. The electronic processing unit is operably connected to the inlet flow meter, one or more solenoid valves of one or more hydraulic mixing ducts, the outlet flow meter, and one or more distribution solenoid valves. The electronic processing unit is configured to receive flow rate values ​​measured by the outlet flow meter and the inlet flow meter, and to measure and control the amount of one or more liquid chemicals fed into one or more cleaning devices based on the measured flow rate values.

[0013] In particular, the electronic processing unit is configured to control one or more solenoid valves and one or more distribution solenoid valves of one or more hydraulic mixing ducts to dispense a predetermined amount of one or more liquid chemical products into one or more cleaning devices based on the measured flow rate values.

[0014] According to one aspect of the present invention, the electronic processing unit may be configured to receive flow rate values ​​measured by an outlet flow meter and an inlet flow meter in real time.

[0015] According to another aspect of the present invention, the electronic processing unit may be configured to measure the amount of one or more liquid chemical products introduced into one or more washing devices by taking the difference between the flow rate measured by the outlet flow meter and the flow rate measured by the inlet flow meter.

[0016] According to yet another aspect of the present invention, the electronic processing unit may be configured to control one or more solenoid valves and one or more distribution solenoid valves of one or more mixed hydraulic ducts to dispense a predetermined amount of one or more liquid chemical products into one or more washing devices based on the difference in measured flow rates.

[0017] According to another aspect of the present invention, the feeding system may further include an inlet pressure sensor located in at least one hydraulic duct upstream of one or more mixed hydraulic ducts, the inlet pressure sensor being configured to detect the pressure of the diluent flowing into at least one inlet hydraulic duct, and an electronic processing unit being operably connected to the inlet pressure sensor to receive a pressure value therefrom and to compensate for fluctuations in the measurement sensitivity of the inlet flow meter and the measurement sensitivity of the outlet flow meter based on the received pressure value.

[0018] According to yet another aspect of the present invention, one or more input devices arranged in one or more hydraulic mixing ducts may be venturi effect mixers, each having a suction line configured to be connected to a respective container containing one or more corresponding liquid chemical products.

[0019] According to another aspect of the present invention, each suction line of one or more venturi-effect mixers may be provided with a check valve configured to allow the flow of a liquid chemical product from the suction line to each of the one or more hydraulic mixing ducts.

[0020] According to another aspect of the present invention, the electronic processing unit may be configured to be operatively connected to each of one or more washing apparatuses via a respective actuation or trigger interface operatively connected to the corresponding washing apparatus of one or more washing devices.

[0021] According to a further aspect of the present invention, the dosing system may comprise a main unit operatively connected to an additional expansion module, wherein the at least one inlet hydraulic duct comprises or consists of a main inlet hydraulic duct of the interconnected main unit and an inlet hydraulic duct of the additional expansion module, and the at least one outlet hydraulic duct comprises or consists of a main outlet hydraulic duct of the interconnected main unit and an outlet hydraulic duct of the additional expansion module, the electronic processing unit is disposed within the main unit, at least one of the one or more mixing hydraulic ducts is disposed within the main unit, and at least one of the one or more mixing hydraulic ducts is disposed within the additional expansion module, whereby an inlet flow meter is disposed on the main inlet hydraulic duct of the main unit and an outlet flow meter is disposed on the outlet hydraulic duct of the additional expansion module.

[0022] The advantageous effects provided by the dosing system according to the present invention are apparent in view of the solution to all of the above-mentioned problems of the prior art.

[0023] First, the dosing system according to the present invention enables accurate control of the amount of liquid chemical product dosed in one or more washing devices, particularly in each washing step.

[0024] Still further, the dosing system according to the present invention is simple, reliable and efficient, and does not particularly require frequent recalibration.

[0025] Still further, the dosing system according to the present invention is extremely low-cost and economical with respect to its manufacture, installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] [Figure 1]A diagram of the electrical system and hydraulic system of a preferred embodiment of the dosing system according to the present invention is shown. DETAILED DESCRIPTION OF EMBODIMENTS

[0027] The present invention will now be described, by way of example and not by way of limitation, in accordance with a preferred embodiment thereof, with particular reference to Figure 1 of the accompanying drawings. Figure 1 shows a diagram of the electrical system and hydraulic system of a preferred embodiment of the dosing system according to the present invention.

[0028] Referring to Figure 1, it can be seen that a preferred embodiment of the dosing system according to the present invention is configured to dose one of ten liquid chemical products respectively contained in respective containers 50A to 50J of four washing machines 60A to 60D.

[0029] Dosing of liquid chemical products is carried out using ten respective Venturi effect mixers, indicated by reference numerals 1240A to 1240F and 2240G to 2240J, in respective dedicated flow paths for each liquid chemical product to be mixed with water.

[0030] The dispensing system in Figure 1 includes a main unit 1000 operably connected to an additional expansion module 2000 that extends the electrical and hydraulic circuits of the main unit 1000, and a plurality of dispensing (distribution) units 3000 operably connected to the additional expansion module 2000 and four washing machines 60A to 60D. In particular, the plurality of dispensing units 3000 are electrically and hydraulically connected to the additional expansion module 2000 and hydraulically connected to the four washing machines 60A to 60D via four respective flow paths. Furthermore, the plurality of dispensing units 3000 are electrically connected to four actuation or trigger interfaces 80A to 80D, each of which is connected to each of the four washing machines 60A to 60D, and similarly, each of the four trigger interfaces 80A to 80D is electrically connected to one of the four wash program selectors 70A to 70D. The electrical connections between the main unit 1000, the additional expansion module 2000, the multiple dispensing units 3000, the trigger interfaces 80A-80D, and the wash program selectors 70A-70D are advantageously made via the CAN bus.

[0031] Other embodiments of the dispensing system according to the present invention can be configured to dispense one or more liquid chemical products into a single washing machine or a single washing device other than a washing machine, in which case the dispensing system does not have multiple dispensing units 3000, and it should be noted that this is always within the scope of protection of the present invention as defined in the appended claims.

[0032] Furthermore, other embodiments of the input system according to the present invention can be configured to input one or more liquid chemicals only through the main unit 1000, in which case there is no additional expansion module 2000 to the input system, but it should be noted that this is always within the scope of protection of the present invention as defined in the appended claims.

[0033] The main unit 1000 includes, as before, a main switch 1110 connected between the electrical network 1100 and the power stage 1120. The power stage 1120 supplies power to the entire power-on system via multiple driver units 1140 or drivers simultaneously connected to an electronic processing unit 1130 such as a CPU or microprocessor. The electronic processing unit 1130 receives power from the multiple driver units 1140 and exchanges signals bidirectionally regarding commands and detected values ​​transmitted to and / or received from the components of the power-on system.

[0034] Multiple driver units 1140 are also connected to multiple solenoid valve drive interfaces 1150, each connected to seven solenoid valves indicated by reference numerals 1230A to 1230F and 1230L, each located in the hydraulic mixing duct of the seven ducts, and each of the hydraulic mixing valves is located downstream of the solenoid valves, with each of the seven Venturi effect mixers indicated by reference numerals 1240A to 1240F and 1240L. Each of the containers 50A to 50F contains the corresponding liquid chemical product, and check valves are configured to allow the flow of the liquid chemical product from each of the containers 50A to 50F to the respective mixing hydraulic duct (conduit), i.e., from the suction line to the respective mixing hydraulic duct, so that the corresponding liquid chemical product is mixed with water when it flows into the respective duct mixing piping section. The suction line of the seventh Venturi-effect mixer 1240L is not connected to any of the containers, but only to the check valve 1250L, so no mixing occurs in each of the hydraulic pipes.

[0035] In hydraulic pipes where mixing of liquid chemical products and water does not occur, the seventh Venturi-effect mixer 1240L and associated check valve 1250L may not be present in other embodiments of the feeding system according to the present invention, and it should be noted that this is always within the scope of protection of the present invention as defined in the appended claims.

[0036] Seven hydraulic mixing ducts are connected to a main inlet hydraulic duct 1500 upstream of each of the seven solenoid valves 1230A-1230F and 1230L, which is similarly connected to a water supply network 1200. Furthermore, the seven hydraulic mixing ducts are connected to an outlet hydraulic duct (pipe) 1600 upstream of each of the seven venturi-effect mixers 1240A-1240F and 1240L. In the main inlet hydraulic duct (pipe) 1500, an inlet pressure sensor 1210 configured to detect the pressure of water entering from the water supply network 1200, and an inlet flow meter 1220 configured to detect the flow rate of water in the main inlet hydraulic duct 1500 are positioned upstream of the seven hydraulic mixing conduits.

[0037] As described above, the expansion module 2000 expands the electrical and hydraulic circuits of the main unit 1000. For this purpose, the expansion module 2000 includes a plurality of driver units 2140 electrically connected to a plurality of driver units 1140 of the main unit 1000, and the main unit 1000 receives power from there and bidirectionally exchanges signals relating to commands and detected values ​​that are transmitted to and / or received from the components of the power supply system. The plurality of driver units 2140 of the additional expansion module 2000 are also connected to a plurality of solenoid valve pilot interfaces 2150 connected to four solenoid valves indicated by reference numerals 2230G to 2230J, each of which is located in each of the four additional hydraulic mixing ducts, and downstream of the solenoid valves, each of the four venturi effect mixers indicated by reference numerals 2240G to 2240J is located therein. Each of the four venturi-effect mixers 2240G to 2240J has a suction line connected to each of the four check valves 2250G to 2250J, each containing a corresponding liquid chemical product, which is then mixed with water as it flows into the respective hydraulic pipe. The four hydraulic mixing ducts of the additional expansion module 2000 are connected to the inlet hydraulic duct (pipe) 2500 upstream of each of the four solenoid valves 2230G to 2230J, which in turn are connected to the main inlet hydraulic duct 1500 of the main unit 1000. Furthermore, these four hydraulic mixing ducts are connected to the main unit 1000 downstream of each of the four venturi-effect mixers 2240G to 2240J. The outlet flow meter 2260 is positioned in the outlet hydraulic duct 2600 downstream of the four hydraulic mixing ducts and is configured to detect the flow rate of water in the outlet hydraulic duct (pipe) 2600 of the additional expansion module 2000.

[0038] The multiple distribution units 3000 include multiple driver units 3140 electrically connected to multiple driver units 2140 of the additional expansion module 2000, which receive power from there and bidirectionally exchange signals relating to commands and detected values ​​transmitted to and / or received from the components of the power supply system. In particular, the multiple driver units 3140 of the multiple distribution units 3000 are advantageously connected to four trigger interfaces 80A-80D via a CAN bus, as described above. The multiple driver units 3140 of the multiple distribution units 3000 are also connected to multiple solenoid valve drive interfaces 3150 connected to four distribution solenoid valves indicated by reference numerals 3230A-3230D, each of which is located in the respective duct hydraulic systems of four hydraulic distribution ducts connected to the corresponding four washing machines 60A-60D. The four hydraulic distribution ducts are connected to the inlet hydraulic duct 3500 upstream of each of the four distribution solenoid valves 3230A to 3230D, which in turn are connected to the outlet hydraulic duct 2600 of the additional expansion module 2000.

[0039] In the cleaning system according to the present invention, eleven solenoid valves 1230A-1230F, 1230L, and 2230G-2230J are powered simultaneously under the control of an electronic processing unit 1130 so that the entire flow rate flows into their respective mixing ducts through the corresponding Venturi effect mixers downstream of the open valves. If the Venturi effect mixers have suction lines connected to containers containing liquid chemical products, the flow of water in each hydraulic mixing pipe activates the Venturi effect mixers, which in turn draw in the liquid chemical products.

[0040] By simultaneously powering the 11 solenoid valves 1230A-1230F, 1230L, and 2230G-2230J, one liquid chemical product is dispensed at a time, preventing mixing and contamination between liquid chemical products contained in different containers 50A-50J. As mentioned above, when solenoid valve 1230L is powered, no mixing occurs within the respective hydraulic pipes. In other words, the set of solenoid valves acts as a chemical product selector.

[0041] The check valves 1250A-1250F and 2250G-2250J in the suction lines of the Venturi effect mixers 1240A-1240F and 2240G-2240J for each chemical product prevent backflow of fluid, i.e., by not mixing water with the liquid chemical products inside the respective containers 50A-50G, dangerous mixing of different liquid chemicals is prevented, and the purity of the liquid chemicals contained inside the containers 50A-50G is preserved. The check valve 1250L on the suction line of the Venturi effect mixer 1240L prevents the reflux of fluid toward the outside.

[0042] The liquid chemical product, diluted with water and introduced by each of the 10 Venturi-effect mixers 1240A-1240F and 2240G-2240J, flows into the outlet flow meter 2260 of the hydraulic duct 2600 at the outlet of the additional expansion module 2000, then into the hydraulic duct 3500 which enters a plurality of distribution units 3000, and into the hydraulic distribution duct via four distribution solenoid valves 3230A-3230D controlled by the electronic processing unit 1130, and downstream therein, into the corresponding four washing machines 60A-60D. Advantageously, in a preferred embodiment of the washing system according to the present invention, the distribution solenoid valves 3230A-3230D are powered simultaneously to manage one washing machine at a time among the four washing machines 60A-60D.

[0043] The feeding system according to the present invention is configured to measure the flow rate of water in the main inlet hydraulic duct 1500 via an inlet flow meter 1220, and to measure the flow rate of fluid in the outlet hydraulic duct 2600 of the additional expansion module 2000, i.e., water that may be mixed with a liquid chemical product, which consequently reaches one of four washing machines 60A to 60D by a plurality of dispensing units 3000. In the case of a solenoid valve corresponding to one of the 10 venturi effect mixers 1240A to 1240F and 2240G to 2240J, the fluid flowing into the outlet hydraulic duct 2600 of the additional expansion module 2000 is a mixture of water and a liquid chemical product drawn in by the associated venturi effect mixer. The electronic processing unit 1130 is configured to receive flow rate values ​​measured by the outlet flow meter 2260 and the inlet flow meter 1220, and based on these, to measure the flow rate of the inhaled liquid chemical product and, consequently, the volume, i.e., the amount, of the liquid chemical product inhaled over the entire operating period of the associated Venturi effect mixer, and consequently to control the amount of liquid chemical product to be inhaled into the four washing machines 60A to 60D. In other words, the electronic processing unit 1130 is configured to control one or more solenoid valves (1230A to 1230F, 2230G to 2230J) of one or more hydraulic mixing ducts and one or more solenoid valves (3230A to 3230D) of a distribution to inject a predetermined amount of one or more liquid chemical products into one or more washing machines (60A to 60D) based on the measured flow rate values.

[0044] In particular, the electronic processing unit 1130 may be configured to take the difference between the flow rate measured by the outlet flow meter 2260 and the flow rate measured by the inlet flow meter 1220. In other words, the electronic processing unit 1130 is configured to control one or more solenoid valves (1230A to 1230F, 2230G to 2230J) of one or more hydraulic mixing ducts and one or more solenoid valves (3230A to 3230D) of a distribution system in order to introduce a predetermined amount of one or more liquid chemical products into one or more washing devices (60A to 60D) based on the value of this difference.

[0045] Consequently, given that real-time measurement of flow rate is independent of pressure drops in the hydraulic circuit of the downstream input system in the water supply network and the viscosity of the liquid chemical product, the input system according to the present invention is configured to accurately control the input of liquid chemical products in a washing machine where the fluid is introduced without the need for calibration.

[0046] To improve measurement accuracy, the electronic processing unit 1130 is configured to compensate for fluctuations in the sensitivity of the flowmeter measurement in response to the water pressure in the main inlet hydraulic duct 1500. In particular, in a preferred embodiment of the feeding system, the flowmeter is a turbine flowmeter, and its coefficient k (pulses / liter) is generally not constant, and is variable, especially for water flowing into the flowmeter at low pressure. To compensate for this variability, the electronic processing unit 1130 is configured to receive the water pressure value in the main inlet hydraulic duct 1500 from the inlet pressure sensor 1210 and compensate for the flow rate values ​​measured by the outlet flowmeter 2260 and the inlet flowmeter 1220 based on electronic corrections that take experimental data into consideration.

[0047] Thus, the feeding system according to the present invention is also adaptable to fluctuations in flow rate and consequently in pressure due to different operating conditions depending on the installation of the feeding system, which are influenced, for example, by the length of pipes and ducts and the height of various components from the ground. This suggests a further advantage in terms of accuracy of the feeding system according to the present invention, making it possible to compensate for physiological fluctuations in flow rate detected by the flow meter in the presence of hydrostatic pressure conditions in the main hydraulic inlet duct.

[0048] Other embodiments of the feeding system according to the present invention may have a processing unit that is not configured to compensate for fluctuations in the sensitivity of the flow meter measurement in response to the water pressure in the main inlet hydraulic duct, and it should be noted that this is always within the scope of protection of the present invention as defined in the appended claims.

[0049] While preferred embodiments and modifications of the present invention have been described above, those skilled in the art will understand that such modifications and changes can be made without departing from the relevant scope of protection as defined in the appended claims.

Claims

1. An input system configured to input one or more liquid chemicals into one or more washing devices (60A to 60D), A water supply network (1200) comprising at least one inlet hydraulic duct (1500, 2500) and at least one outlet hydraulic duct (1600, 2600), and one or more mixed hydraulic ducts connected between the at least one inlet hydraulic duct (1500, 2500) and the at least one outlet hydraulic duct (1600, 2600), each of which is equipped with a solenoid valve (1230A to 1230F, 2230G to 2230J), Includes, Downstream of each of the aforementioned solenoid valves (1230A to 1230F, 2230G to 2230J), there are respective input devices (1240A to 1240F, 2240G to 2240J) configured to introduce each of the one or more liquid chemical products into the mixed hydraulic duct when the diluent flows in. The at least one outlet hydraulic duct (1600, 2600) is similarly connected to the inlet hydraulic duct (3500) of the distribution unit (3000). The distribution unit (3000) comprises one or more distribution solenoid valves (3230A to 3230D), each of which is located downstream of the distribution solenoid valve in the respective hydraulic distribution duct connected to the corresponding cleaning device of the one or more cleaning devices (60A to 60D). The input system further includes an electronic processing unit (1130) configured to be operably connected to one or more washing devices (60A to 60D), an inlet flow meter (1220) located in at least one inlet hydraulic duct (1500, 2500) upstream of the one or more mixed hydraulic ducts, and an outlet flow meter (2260) located in at least one outlet hydraulic duct (1600, 2600) downstream of the one or more mixed hydraulic ducts. The electronic processing unit (1130) is operably connected to the inlet flow meter (1220), the one or more solenoid valves (1230A to 1230F, 2230G to 2230J) of the one or more mixed hydraulic ducts, the outlet flow meter (2260), and the one or more distribution solenoid valves (3230A to 3230D). The electronic processing unit (1130) is configured to receive flow rate values ​​measured by the outlet flow meter (2260) and the inlet flow meter (1220), measure the amount of the one or more liquid chemicals introduced into the one or more cleaning devices (60A to 60D) based on the measured flow rate values, and control the one or more solenoid valves (1230A to 1230F, 2230G to 2230J) and the one or more distribution solenoid valves (3230A to 3230D) of the one or more mixed hydraulic ducts to introduce a predetermined amount of the one or more liquid chemicals into the one or more cleaning devices (60A to 60D) based on the measured flow rate values, in this introduction system.

2. The feeding system according to claim 1, wherein the electronic processing unit (1130) is configured to receive the flow rate values ​​measured by the outlet flow meter (2260) and the inlet flow meter (1220) in real time.

3. The input system according to claim 1 or 2, wherein the electronic processing unit (1130) is configured to measure the amount of the one or more liquid chemicals to be introduced into the one or more washing devices (60A to 60D) by taking the difference between the flow rate value measured by the outlet flow meter (2260) and the flow rate value measured by the inlet flow meter (1220).

4. The injection system according to claim 3, wherein the electronic processing unit (1130) is configured to control the one or more solenoid valves (1230A to 1230F, 2230G to 2230J) and the one or more distribution solenoid valves (3230A to 3230D) of the one or more mixed hydraulic ducts, and to inject a predetermined amount of the one or more liquid chemicals into the one or more washing devices (60A to 60D) based on the difference in the measured flow rates.

5. The system further includes an inlet pressure sensor (1210) located in at least one of the inlet hydraulic ducts (1500, 2500) upstream of the one or more mixed hydraulic ducts, The inlet pressure sensor (1210) is configured to detect the pressure of the diluent flowing into the at least one inlet hydraulic duct (1500, 2500). The feeding system according to claim 1, wherein the electronic processing unit (1130) is further operably connected to the inlet pressure sensor (1210), receives a pressure value from there, and is configured to compensate for fluctuations in the measurement sensitivity of the inlet flow meter (1220) and the measurement sensitivity of the outlet flow meter (2260) based on the received pressure value.

6. The feeding system according to claim 1 or 5, wherein the one or more feeding devices (1240A to 1240F, 2240G to 2240J) arranged in the one or more mixed hydraulic ducts are venturi mixers, each having one suction line configured to be connected to each container (50G to 50J) containing the corresponding liquid chemical products of the one or more liquid chemicals.

7. The feeding system according to claim 6, wherein a check valve configured to allow the flow of a liquid chemical product from the suction line to each of the one or more mixed hydraulic ducts is located in the suction line of each of the one or more venturi mixers (1240A to 1240F, 2240G to 2240J).

8. The feeding system according to any one of claims 1 to 7, wherein the electronic processing unit (1130) is configured to be operably connected to each of the one or more cleaning devices (60A to 60D) through respective trigger interfaces (80A to 80D) which are operably connected to the corresponding cleaning device of the one or more cleaning devices (60A to 60D).

9. It comprises a main unit (1000) operably connected to an additional expansion module (2000), The at least one inlet hydraulic duct (1500, 2500) comprises or consists of the main inlet hydraulic duct (1500) of the main unit (1000) and the inlet hydraulic duct (2500) of the additional expansion module (2000), which are interconnected. The at least one outlet hydraulic duct (1600, 2600) comprises or consists of an outlet hydraulic duct (1600) of the main unit (1000) and an outlet hydraulic duct (2600) of the additional expansion module (2000), which are interconnected. The electronic processing unit (1130) is located within the main unit (1000). The feeding system according to any one of claims 1 to 8, wherein at least one of the one or more mixed hydraulic ducts is located within the main unit (1000), and at least one of the one or more mixed hydraulic ducts is located within the additional expansion module (2000), so that the inlet flow meter (1220) is located in the main inlet hydraulic duct (1500) of the main unit (1000), and the outlet flow meter (2260) is located in the outlet hydraulic duct (2600) of the additional expansion module (2000).

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