RU2760379C2 - Method for automatically detecting incorrect position of object in working area of dishwasher - Google Patents

Abstract

FIELD: household appliances.SUBSTANCE: present invention relates to a method for automatically detecting the incorrect position of object (S, 5, 7) in washing area (2) of a dishwasher having optical means (8) and user interface (9). The method includes obtaining, processing and comparing various images to check, whether object (S, 5, 7) has changed its position in order to indicate a change in operating condition (16A) using user interface (9).EFFECT: possibility of detecting the incorrect position of an object in the working area of the dishwasher.12 cl, 6 dwg

Description

The technical field to which the invention relates

The present invention relates to a method for automatically detecting the incorrect position of an object in the working area of a dishwasher, as defined in the limiting part of claim 1 of the claims.

The present invention also relates to a dishwasher capable of performing a method for automatically detecting an incorrect position of an object in a working area, as defined in the preamble of claim 10.

In addition, the present invention relates to a system consisting of a dishwasher and a portable user device, and adapted to implement a method for automatically detecting the wrong position of an object in a working area, as defined in the preamble of claim 13.

State of the art

Dishwashers are known in the art which are equipped with optical devices, such as cameras, video cameras or camcorders, located in a fixed or movable position relative to the washing chamber to check the load of the dishes or the degree of washing.

For example, such dishwashers are described in WO 2016008699 and US 2012/0138092.

During the operation of a dishwasher of the above type, conditions can arise that cause deterioration in the washing and drying performance when fully loaded and / or partially loaded into the work area, which is the washing zone.

It can also be caused by the fact that, in certain cases, the dishes loaded by the user on the rack can:

- move due to its unstable position on the stand;

- move due to the mechanical action of the washing liquid;

- move due to the influence of the mass of water;

- block the rotation of the impellers used to distribute liquid on the dishes;

- block the door of the liquid dispenser.

Disclosure of invention

An object of the present invention is to provide a method, a dishwasher and a system for evaluating whether products have changed their position in a washing area in order to avoid the above-described problems of the prior art.

This problem is solved using a method, a dishwasher and a system for automatically detecting the incorrect position of an object in the dishwasher washing area, as defined in the following paragraphs. 10 and 13 of the claims, respectively.

An embodiment of the present invention provides a method and a corresponding dishwasher and a system of a dishwasher and a portable user device that can be used to identify movement of objects within a dishwasher washing area in order to perform actions and restore conditions for proper positioning of products, thereby reducing the need to wash part of the dishes and / or repeating the wash cycle, which leads to the consumption of water, detergent and energy.

Brief Description of Drawings

The characteristics and advantages of the present invention will become apparent from the following detailed description of a possible practical embodiment, shown by way of non-limiting example with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a method according to the present invention;

fig. 2 is a front perspective view of an integrated dishwasher with trim panels removed, adapted to carry out the method of FIG. 1;

fig. 3 is a rear perspective view of the dishwasher of FIG. 2 with some parts removed and utensils removed;

fig. 4 is a detailed view of the area adjacent to the dispenser when the latter is equipped with the optical arrangement of the dishwasher of FIG. 2 according to the present invention;

fig. 5 is a sectional view along the line V-V of FIG. 4;

fig. 6 is a control diagram for the operation of the dishwasher.

Implementation of the invention

Unless specifically indicated, certain features described with reference to specific embodiments are to be construed as additional or interchangeable with other features described with reference to other illustrative embodiments.

As shown in FIG. 2-5, numeral 1 denotes a dishwasher, for example, of the built-in type, installed in a kitchen cabinet, with its facing panels removed to improve the display of internal volumes.

The dishwasher 1 comprises a washing zone 2 and a door 3 adapted to tightly close the washing zone 2.

The dishwasher 1 has a base 1A, in the usual way intended to accommodate mechanisms / devices in order to carry out the operations of the dishwasher 1.

Washing zone 2 defines the volume in which the objects S, 5 and 7 to be monitored are located.

More specifically, the washing area 2 is delimited by a number of walls, namely the base wall 2A, the side walls 2B and 2C, the upper wall 2D and the lower wall 2E, and has an upper portion 2ʺ and a lower portion 2 '.

The terms "top / bottom" should be considered as referring to the proper installation and operation of the dishwasher 1. In this application, the term "upper" refers to the area that is farther from the base 1A, and the term "bottom" refers to the area that is closer to the base 1A ...

The door 3 can be operated by the user manually and / or by means of a drive and is designed to tightly close the washing zone 2 in order to avoid leakage of washing liquids during the washing program.

The term "object S, 5 and 7" should be considered as:

- an item S of utensils, such as a plate, cutlery, glass, mug or

- a part of the dishwasher itself, namely the impeller 5 for supplying the washing liquid to the washing area, or the door 7 of the dispenser containing the detergent.

The existing impellers 5 are well known and are not further described in this application. It should only be noted that one or preferably two impellers can be disposed in the washing area. More specifically, the first impeller is located in the lower region 2 'adjacent to the base 1A, and the other is located in the upper region 2ʺ, preferably in the lower portion of the upper region.

The pan 21 is located in the lower region 2 'and / or the upper region 2ʺ and is intended to accommodate the dishes S in a manner known per se and is not described further in this application.

The dishwasher 1 contains a dispenser 6, the shape of which determines the volume intended to contain the means necessary for washing objects, in particular, dishes.

For example, these products can be detergent powders or tablets, or gel.

The dispenser 6 may contain one or more compartments, each of which is designed to accommodate a specific detergent.

According to an embodiment, the dispenser 6 comprises a door 7, which is movable between a closed position and a position providing free access to the inner volume of the dispenser 6.

For example, when the door 7 is in the closed position, the detergents cannot come out of the respective compartments, and when the door 7 is in the open position, the detergents can escape from the respective compartments.

The door 7 is moved between the closed position and the open position by means of mechanical or electrical control using the control unit 4 after closing the door 3 of the dishwasher 1.

In the embodiment shown in FIG. 4, the dispenser 6 is positioned on the door 3 and in particular on the side facing the washing zone 2 at a predetermined height. In particular, the dispenser 6 is located in the door 3 within its thickness.

The dishwasher 1 contains a control unit 4, for example, located within the thickness of door 3, which is equipped with a motherboard with common electrical and electronic devices, including a central processor, a number of input and output ports for receiving and transmitting data, and a memory unit, part of which is intended for permanent storage of at least one washing program.

The control unit 4 is a unit configured to control and monitor the operating functions of the dishwasher 1.

In an embodiment of the present invention, the memory of the control unit 4 is configured to permanently store a database in which the contours of the objects S, 5 and 7 are identified using the corresponding parameters.

Objects S, 5 and 7 are mainly identified in the database using one or more digital parameters that can characterize the contour of objects S, 5 and 7. For example, with regard to impeller 5 or door 7 of dispenser 6, the so-called mathematical relationships that characterize these devices are already known to the manufacturer of the dishwasher 1, but the identification of the dish S is provided using a specific imaging.

In order to carry out the selected washing program, the dishwasher 1 comprises a pump, for example located in the base 1A and adapted to be connected to the water supply using a method known to those skilled in the art and not described in this application.

For example, this pump is controlled by a solenoid valve and is designed to pump water from the water supply and supply it to the impellers 5 located in zone 2 of the sink.

The dishwasher 1 contains one or more optical devices 8 that can capture digital images of the washing area 2.

According to an embodiment, the optical devices 8 are arranged in such a way that their optical system faces the washing zone 2.

In other words, each wall 2A, 2B, 2C, 2D and / or 2E of the washing zone 2 may contain, within its thickness, one or more of the above optical devices 8.

For this purpose, a recess 2F is provided for each optical device 8.

The dishwasher 1 contains a user interface 9, i.e. control and monitoring interface through which the user can regulate and control the operation and functions of the dishwasher.

For this purpose, the user interface 9 is in communication with the control unit 4 through the input and output ports of the specified control unit to receive data processed by the central processor of the control unit.

In an embodiment, the user interface 9 is a screen 23 that is built into the dishwasher 1 and is visible to the user during normal use of the dishwasher and / or is additionally equipped with an audible alarm (not shown).

In the embodiment shown in FIG. 1 and 2, the user interface 9 is integrated into the door 3 and is oriented so that the screen faces away from the washing area 2.

It should be noted that the screen of the user interface 9 is configured to display light indications, text messages and / or single or continuous images. In other words, the images displayed on the screen can be images of the washing zone 2 and objects located therein, which are captured by the optical devices 8. In particular, said screen can be a touch screen (i.e., touch sensitive).

In another embodiment, the user interface 9 comprises one or more analog buttons and / or a combination of analog / digital controls and / or a combination of analog / digital controls and a screen, the latter being, for example, a touch screen.

The user interface sound alarm device 9 is designed to provide the user with acoustic warning signals about any situations or operating conditions.

According to an embodiment, the dishwasher 1 comprises a radio transmitting / radio receiving device that is configured to communicate via a wired and / or wireless network. For example, a wireless network can be an internet protocol-based network that uses a Wi-Fi connection or a Bluetooth WPAN (wireless personal area network).

The recess 2F defines a volume for accommodating the corresponding optical device, and the translucent panel 8A preferably covers the optical system of the optical device.

The translucent panel 8A is made, for example, of glass or plastic, or a material having similar technical characteristics.

The translucent panel 8A is preferably substantially flush with or slightly protrudes from the wall surface 2A, 2B, 2C, 2D or 2E.

In particular, as shown in FIG. 5, the recess 2F is formed within the thickness of the door 3 of the dishwasher 2. As shown in FIG. 5, all electrical and electronic parts necessary for the operation of the optical device 8 are located in the recess 2F.

Optical devices 8 installed in the dishwasher 1 capture still and / or sequential two-dimensional images at predetermined capture rates in the visible range of the electromagnetic spectrum, for example, a single-frame image or a batch of images or a continuous sequence of images of the washing zone 2 and, in particular, objects S, 5, 7 in the washing area.

For example, as shown in FIG. 5, it can be taken into account that the optical device 3 has a field of view 8B, allowing the capture of images of objects S, 5 and 7 that fall into such a field of view.

These optical devices 8 are in communication with the control unit 4 through the input and output ports of the specified control unit to send the collected data to the control unit 4.

Optical devices 8 are made, for example, in the form of a camera and / or video camera. These devices are known and are not described in detail in this application.

However, it should be noted that the camera and / or video camera used in the dishwasher 1 preferably meets the specifications for operation in water, i. E. the camera and / or video camera comply with the IP x standard (1-8).

Instead of, or in addition to, the specified specifications, the recess 2F in which the optical devices 8 are mounted is designed to be watertight, for example by using sealing methods.

In this case, the user interface 9 also comprises a portable device (i.e., a device that the user can carry while holding the device in his hand) 22, such as a smartphone, tablet, personal computer, or similar devices.

In other words, the user interface 9 comprises both a conventional control interface of the dishwasher 1 and a screen of the portable device 22.

In particular, the portable device 22 comprises its own radio transmitting / radio receiving device that is configured to communicate with the radio transmitting / radio receiving device of the dishwasher 1.

According to an embodiment (Fig. 6), the portable device 22 is capable of communicating not only with the control unit 4 of the dishwasher 1, but also via the Internet, for example, via the GSM infrastructure, with one or more remote servers 24 for performing storage, storage and / or processing data in relation to images captured by optical devices 8.

In other words, the portable device 22 is adapted to be connected directly to the dishwasher 1 and to the Internet via the GSM infrastructure. Thus, a system 25 is provided which comprises a dishwasher 1 and a portable device 22 that communicate with each other via a GSM network, Wi-Fi connection and / or WPAN.

It should be noted that the screen of the portable device 22 is configured to display light indications, text messages and / or images captured by the optical devices 8.

According to an embodiment of the present invention, if the user interface also includes the portable device 22, then the database in which the contours of the objects S, 5 and 7 are identified by the corresponding parameters can be stored at least partially, preferably completely, in memory the portable device 22, in the server storage and / or may be distributed in the memory devices of the dishwasher 1, the portable device 22 or the server 24.

According to an embodiment, the control unit 4 is in communication with the user interface 9 (provided either in the form of the screen of the dishwasher 1 or the screen of a portable device) for transmitting changes in the operating state of the dishwasher 1.

In the context of this document, a change in operating state means any change in the functioning of the dishwasher 1 as a result of moving one or more of the objects S, 5 or 7 to a position that cannot ensure the proper operation of the dishwasher, i.e. the machine comes to a state in which one or more problems occur.

These problems include, in particular, the following:

- a component 5 or 7 of the dishwasher that has not been moved from its original position, for example because it has been blocked by an object in the dishwasher,

- a cookware item S that has been moved from its original position, for example, to a position where it cannot be properly washed and / or dried, or to a position in which it will block the movement of components (for example, the rotation of the impellers or the movement dispenser door from the closed position to the open position) of the dishwasher.

In an embodiment, identifying one or more of the above problems does not affect the execution of the washing program, i. E. washing program that has been set and which will be executed despite the detected problem (s).

Alternatively, after detecting one or more of the above problems, it is envisaged to stop the execution of the washing program or automatically, i. E. using the control unit 4, or manually, i.e. user. The execution of the initially selected program is resumed until its complete execution after the user resolves the detected problems.

In another embodiment, after detecting one or more of the above problems, it can be provided to change the washing program or to automatically modify it by the control unit 4, taking into account the detected problem.

For example, in the case of changing the washing program, if, for example, the detected problem is a displacement of the dishware S from the initial position (which affects the washing efficiency), the washing program in progress can be changed by the control unit 4 by increasing the water supply time (i.e. duration) to correct the detected problem.

Therefore, visual indications that can be displayed on the user interface screen in addition to the usual indications known in the prior art can provide warning of possible changes in operating states of the dishwasher 1.

As shown in FIG. 1, a method for automatically detecting the wrong position of the object S, 5 and / or 7, i. E. of the dishwasher and / or component of the dishwasher 1 in the washing zone 2, includes the step of ensuring the presence of a number of objects S, 5, 7 in the washing zone 2.

It should be noted that the steps of the method described below, i. E. the steps of obtaining, processing, filtering, comparing and separating data can be performed either directly by the central processor of the control unit 4 or, more preferably, by the central processor of the user's portable device via an Internet connection with the central processor of remote servers for data analysis and processing.

The method comprises the step of obtaining a first digital image 11, characteristic of a number of objects S, 5 and / or 7.

This stage is performed using the optical device (s) 8 located in the zone 2 of the wash.

The first digital image is preferably obtained after closing the door 3, but before starting the washing program.

To this end, the control unit 4 monitors the step by controlling the specific optical device 8 or optical devices 8 after closing the door 3 before starting the washing program.

After acquiring the first image, the method comprises a step 12 of digitally processing the first acquired image 11 to obtain a first processed image 12A, said first processed image 12A defining a first outline for each object from a specified number of objects S, 5 and / or 7.

In other words, the control unit 4 and / or the portable user's device starts a process in which the first image 11 is processed to define the outline of each of the objects S, 5 and / or 7 in the washing zone 2, which can be either dishes and / or dishwasher components ...

It should be noted that the first processed image 12A is the original image, i. E. image of the original position of objects S, 5 and / or 7, the incorrect position of which is to be assessed.

The method comprises a filtering step 13, which filters the first processed image 12A on the basis of a first contour of each object to obtain a first filtered image 13A. This first filtered image 13A defines a first group of objects 13B, this first group of objects being objects 5 and / or 7 of a number of objects S, 5 and / or 7 that can move relative to the washing zone 2.

In other words, by using the filter 13, the outlines of objects in the first processed image 12A can be recognized to obtain a first filtered image 13A that contains only the outlines of those objects that can move relative to the washing area.

Consequently, the first group of objects 13B contains objects that are supposed to move relative to the washing zone 2 during the washing program, these articles being components of the dishwasher 1. These objects of the first group of articles 13B are, for example, the impeller / impellers 5 and the door 7 dispenser 6.

The impeller / impellers 5 must move relative to the washing area in order to supply a uniform flow of water and detergents to the washing area 2. Moving is a rotation around a center point, which is the center of gravity.

Similarly, for mixing detergents with water, the door 7 of the dispenser 6 must be moved from the closed position to the open position.

The filtering step 13 can be performed, for example, by comparing the identified circuits with the circuits stored in a database contained in the memory of the control unit 4 or in the memory of the user's portable device or in a server remote from both the dishwasher 1 and the user's portable device. ...

In other words, the contours of the impellers 5 and / or the door 7 of the dispenser 6 are known to the manufacturer of the dishwasher 1 and can be stored in advance and directly compared with the contours of the first processed image 12A.

Other contours in the first processed image 12A, i. E. the contours that are not part of the first group 13B belong to the second group of objects 13D, which, as described below, define objects S that are stationary relative to the washing area.

In the context of this document, it is assumed that the term "objects that are stationary relative to the washing zone 2 or can move relative to the washing zone 2" indicates that:

- in the first case, the spatial coordinates identifying one or more distinguishing features of objects (for example, the edge of the plate, the bottom of the glass, etc.) will be unchanged with respect to the reference system, which is represented by the washing zone 2 during the washing program (i.e. the coordinates are independent of the time when the cycle of the washing program is executed);

- in the latter case, the spatial coordinates identifying one or more distinguishing features of objects (for example, the end of the impeller, the edge of the dispenser door, etc.) will change with respect to the reference system, which is represented by the washing zone 2 during the washing program (i.e. .coordinates are time-variable during the cycle of the washing program).

The first group of objects 13B

The method comprises the step of obtaining a second image 14, characteristic of the first group of objects 13B, after the first predetermined time period T1 has elapsed from the start of the washing program.

Preferably, this first time period T1 should be more than a few seconds, which makes it possible to check if the objects of the first group 13B have moved or if they are moving in the washing zone 2.

In a preferred embodiment, this first time period T1 is greater than three seconds and not more than four minutes. During this interval it can be checked whether the impeller / impellers are rotating and that the dispenser door 7 was actually open.

According to an embodiment, the optical devices 8, which are preferably used for obtaining the second image 14, are optical devices located in the lower portion 2 'of the washing zone 2.

The method comprises a step 15 of digitally processing a second acquired image 14 to obtain a second processed image 15A, this second processed image 15A defining a second contour for each object from said first group of objects 13B.

The method comprises the step 16 of comparing the first filtered image 13A with the second processed image 15A to evaluate whether the first contour of each object from the specified first group of objects 13B coincides with the corresponding second contour, and if so, issuing a notification 16A of a critical change in the operating condition using user interface 9.

In other words, after a period of time T1 has elapsed after the start of the washing program, the control unit 4 operates the optical device (s) 8 to acquire the second image 15A to check whether the object outline of the first group of objects 13B has moved or is moving.

In the case of the impeller / impellers 5, the control unit 4 can check if they are moving to indicate the first critical state 16A via the user interface 9 if an obstacle is blocking their movement.

This also applies to door 7 of dispenser 6.

Therefore, the signal associated with the first critical condition 16A allows the user to set via interface 9:

- whether the rotation of the impeller / impellers 5 is blocked or impeded,

- was the dispenser door 7 open?

According to an embodiment, after the step (or possibly at the same time) of indicating the first critical state 16A, it is envisaged that the washing program will continue as expected and the program will be changed in response to said first critical condition 16A that has been detected or the execution of the program will be stopped until normal operating conditions are restored.

The second group of 13D objects

The first loop filtering step 13 of each article may filter the first processed image 12A to additionally or optionally obtain a second filtered image 13C, the second filtered image defining a second group of objects 13D.

The second group of objects 13D represents objects S from a number of objects S, 5 and 7, which are stationary relative to the washing zone 2.

As mentioned above, the objects that are required to be stationary in relation to the zone 2 of the sink are the dishes S.

The method comprises the step of obtaining a third image 18, characteristic of the second group of objects, after a second predetermined time period T2 has elapsed from the start of the washing program.

Preferably, this second time period T2 should be more than a few seconds, which makes it possible to check whether the objects of the second group are stationary, i.e. that they do not move in zone 2 of the wash.

In an embodiment, the second time period T2 is greater than one minute.

In an aspect, the optics 8 that are preferably used to acquire the third image 18 are optics that are located in the side walls 2B and 2C.

The method comprises a step 19 of digitally processing a third acquired image 18 to obtain a third processed image 19A, the third processed image 19A defining a second contour for each object of said second group of objects 13D.

The method comprises the step 20 of comparing the second filtered image 13C with the third processed image 19A to evaluate whether the first contour of each object from the second group of objects 13B coincides with the corresponding second contour, and if not, issuing a notification 20A of a critical change in the operating state using the interface 9 users.

In order to ensure that the first group of objects can be moved during the execution of the washing program, or, in particular, when the washing program requires that the impellers be able to move, the method comprises repeating steps 14, 15 and 16, namely, obtaining a second image characteristic of the first group of objects 13B, after the expiration of the first predetermined period of time T1 from the start of the washing program at constant or random intervals, in order to thus obtain a number of second images at intervals in time characteristic of the position of the first group of objects 13B relative to the washing zone 2.

By repeating steps 14, 15 and 16, a comparison can be made with the first filtered image 13A to assess whether the first contour of each object from the first group of objects 13B matches the corresponding second contour, and if so, issuing a critical change in the operating condition notification 16A with using the user interface 9.

In other words, the control unit 4 commands the optical device (s) 8 to acquire additional second images 14, said image acquisition being performed at constant or random intervals. These second images 14 are processed to define new object outlines. These new contours are compared with the corresponding contours of the first filtered image 13A to evaluate whether movement has occurred. If the contours match, a change notification is issued via the user interface 9.

The method contains the same procedure for the second group of objects 13D, mutatis mutandis, except that a change in operating state is notified if the new contours do not match the contours of the second filtered image.

In particular, the method comprises repeating steps 18, 19 and 20 to evaluate, by comparing with the second filtered image 13C, whether the first outline of each object from the second group of objects 13D matches the corresponding second outline, and if not, issuing a critical change notification 20A operating state using user interface 9.

Therefore, the signal associated with the second critical condition 20A allows the user to ascertain via the interface 9 whether the objects S have changed their position.

According to an embodiment, after the step (or possibly at the same time) of indicating the second critical state 20A, it is envisaged that the washing program will continue as expected and the program will be changed in response to said second critical state 20A that has been detected or the execution of the program will be stopped until normal operating conditions are restored.

According to an embodiment, the processing steps 12, 15 and 19 comprise a process by which the images 13A, 13C are separated using the grid placed on them to compare this grid with the corresponding grid of the later images 15A and 19A.

In particular, by comparing the spatial position of the contours of the obtained images 13A, 13C of objects S, 5 and 7 with the corresponding grids as a guide with the contours of objects S, 5 and 7 in the images 15A and 19A obtained later with the corresponding grids as a guide, it is possible to perform assessing whether the objects of the first group 13B have moved, or the objects of the second group are still stationary relative to the washing zone 2. Timely comparison of the contour of the object, which lies within the grid of the original image, with the corresponding grid of the next image, makes it possible to assess the possible movement (or impossibility of movement) of the captured object.

As indicated above, the method and the dishwasher 1 can provide notification of the operating state of the machine via the user interface 9 and take actions to restore the proper location conditions for the object. This reduces the need to wash part of the dishes and / or repeat the wash cycle, which leads to wasted water, detergent and energy.

Those skilled in the art will appreciate that a number of changes described above can be made to meet specific requirements without departing from the scope of protection as defined in the claims below.

Claims (27)

1. A method for automatically detecting the wrong position of an object (S, 5, 7) in the zone (2) of the dishwasher (1), while the above dishwasher contains a door (3) designed to connect to the specified zone (2) of the dishwasher for its closing, and is configured to implement the washing program and communicate with the user interface (9), and the specified method comprises the following steps: - ensuring the presence (10) of a certain number of objects (S, 5, 7) in the specified washing area (2); - obtaining the first digital image (11), typical for the specified number of objects (S, 5, 7); - digital processing (12) of the first obtained image (11) to obtain the first processed image (12A), and the first processed image (12A) defines the first contour for each object from the specified number of objects (S, 5, 7); - according to the first contour of each object, filtering (13) of the first processed image (12A) to obtain a first filtered image (13A), wherein said first filtered image (13A) defines the first group of objects (13B), and said first group of objects (13B) represents objects (5, 7) from a number of objects (S, 5, 7) that can move relative to the washing zone (2) during the washing program, and the first group of objects (13B) contains at least one a component of said dishwasher (1); - obtaining a second digital image (14), characteristic of the first group of objects (13B) after the first predetermined time period (T1) from the start of the washing program; - digital processing (15) of the second obtained image (14) to obtain a second processed image (15A), and the second processed image (15A) defines a second contour for each object from the specified first group of objects (13B); - comparing (16) the first filtered image (13A) with the second processed image (15A) to evaluate whether the first contour of each object from the specified first group of objects (13B) matches the corresponding second contour, and if so, issuing a notification about the first critical changing the condition (16A) of the operating state using the specified user interface (9); characterized by the presence of the following stages: - according to the first contour of each product, filtering the first obtained image (12A) to obtain a second filtered image (13C), wherein said second filtered image (13C) defines a second group of objects (13D), and said second group of objects (13D) represents objects from some the number of objects (S, 5, 7) that are stationary relative to the washing zone (2) during the washing program; - obtaining a third image (18), characteristic of the specified second group of objects, after a second predetermined period of time (T2) from the start of the washing program; - digital processing (19) of said third acquired image (18) to obtain a third processed image (19A), wherein said third processed image (19A) defines a second contour for each object from said second group of objects (13D); - comparing (20) the second filtered image (13C) with the third processed image (19A) to evaluate whether the first contour of each object from the specified second group of objects (13D) coincides with the corresponding second contour, and if not, issuing a notification about the second critical changing the operating state condition (20A) using the user interface (9). 2. A method according to claim 1, wherein the step of acquiring the first digital image (12) is carried out after the door (3) has been closed and when the washing program has not yet started. 3. The method according to claim 1, which comprises repeating at constant or random intervals after the first predetermined time period (T1) has elapsed from the start of the cleaning program of the stage of obtaining the second digital image (14), digital processing (15) of said second obtained image (14 ) to obtain a second processed image (15A) and compare (16) said first filtered image (13A) with said second processed image (15A) to obtain a number of second images with a time interval characteristic of the position of the first group of objects (13B) relative to washing zones (2). 4. The method according to claim. 1, which contains repetition at constant or random intervals after a second predetermined period of time (T2) from the start of the washing program of the stage of obtaining the third digital image (18), digital processing (19) of said third obtained image (18 ) to obtain the third processed image (19A) and compare (20) the specified second filtered image (13C) with the specified third processed image (19A) to obtain a certain number of third images with a time interval characteristic of the position of the second group of objects (13D) relative to washing zones (2). 5. A method according to claim 1, wherein said first group (13B) comprises a dishwasher component (5, 7) that is movable between first and second operating positions. 6. The method according to claim 1, wherein said second group (13D) contains a plurality of utensil items (S). 7. A method according to any one of claims. 1-6, in which said processing steps (12, 15, and 19) comprise a process by which said first and second filtered images (13A, 13C) are positioned on a reference grid to compare such a grid with the corresponding grid of the second or third processed image (15A and 19A). 8. The method according to claim 1, wherein after said step of issuing a notification of said first critical state (16A) or said second critical state (20A), said washing program changes according to said first critical state (16A) or second critical state (20A) , about which a notification has been issued, or its execution is terminated. 9. A dishwasher containing a washing zone (2) and a door (3) designed to connect to the specified washing zone (2) to close it, a control unit (4) having a memory with a washing program stored in it, a pump made with the ability to connect to the water supply network for pumping water from the water supply network, one or more impellers (5) communicating with the specified pump, a dispenser (6) having a door (7) made with the ability to move between a closed position and an open position, one or more optical devices (8) designed to obtain digital images of the specified washing zone (2), and a user interface (9), wherein said one or more optical devices (8) and a user interface (9) are connected to the control unit (4), and also with a pump, characterized in that it has a program located in another part of said memory, which is configured to perform the steps according to any one of claims. 1-8. 10. The dishwasher of claim 9, wherein said user interface is a screen (23) integrated into said dishwasher, said screen (23) being configured to display a first critical state (16A) and / or a second critical state (20A ) due to a change in the operating state by means of warning lights, texts and / or images. 11. The dishwasher according to claim 9, comprising a radio transmitting device, said user interface being a portable device (22) having its own transmitting device configured to communicate with said radio transmitting device of the dishwasher (1) to receive data characteristic of a change the operating state, and the portable device has its own screen, which is configured to display the change in the operating state by means of light signals, texts and / or images. 12. A system for automatically detecting the wrong position of an object (S, 5, 7) in the zone (2) of the dishwasher (1), containing: a dishwasher (1) containing a washing zone (2) and a door (3) designed to connect to the said washing zone (2) to close it, a control unit (4) having a memory with a washing program stored in it, a pump executed with the ability to connect to the water supply network for pumping water from the water supply network, one or more impellers (5) communicating with such a pump, a dispenser (6) having a door (7) adapted to move between a closed position and an open position, one or several optical devices (8), made with the possibility of obtaining digital images of the specified washing zone (2), and the user interface (9), and the specified one or more optical devices (8) and the user interface (9) are connected to the control unit (4) as well as with a pump, and a radio transmitting / radio receiving device; a portable device (22) designed to be held by a user, having its own radio transmitting / radio receiving device capable of establishing communication with said radio transmitting / radio receiving device of said dishwasher, a screen capable of displaying light alarms, texts and / or images, and memory, characterized in that it contains a program located in a part of the specified memory of the portable device (22) of the user, and the specified program is configured to perform the steps according to any one of claims. 1-8, for the first or second break of the operating state condition (16A, 20A) to be displayed on said interface (9) and / or said screen of said portable user device.

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