WO2010052318A1

WO2010052318A1 - Carriage for cleaning the inside of housings, in particular cooling housings, equipment, and method for implementing said carriage

Info

Publication number: WO2010052318A1
Application number: PCT/EP2009/064817
Authority: WO
Inventors: Frédéric MICHAUD-GROSBENOIT; Lydie Michaud-Grosbenoit; Joseph Moreira
Original assignee: Michaud-Grosbenoit Frederic; Lydie Michaud-Grosbenoit; Joseph Moreira
Priority date: 2008-11-07
Filing date: 2009-11-09
Publication date: 2010-05-14
Also published as: FR2938222A1; FR2938222B1

Abstract

The invention relates to a carriage having a front cleaning block (10) in the upper portion (9) thereof, a rear cleaning block (11), a rotary nozzle (12a) on one side thereof and a rotary nozzle (12b) on the other side and vertical side ramps (12’a, 12’b) in addition to or in lieu of the rotary nozzles (12a, 12b). The carriage further includes four reduction motors for rotary front and rear rinsing heads (400) and the rotary side nozzles (12a, 12b), a connection (17) to an external liquid source, means (14a, 14b) for pressurising said liquid, a washing product tank (15.1, 15.2), a motor (4a, 4b) for driving the driving wheels (3a, 3b, 3c, 3d), guiding members (18a, 18b) for the carriage (1), end-of-travel sensors for the carriage (1), an automated driving unit (16), an electric power source and/or a connection (17) to an external power supply.

Description

CLEANING CART FOR INTERIOR OF SPEAKERS, ESPECIALLY REFRIGERATED; INSTALLATION AND METHOD IMPLEMENTING THIS

CHARIOT Field of the invention

The field of the invention relates to the cleaning of the interior of enclosures, including containers of the type that are mounted on trucks and which are intended for the storage and transport of goods. Containers particularly targeted are refrigerated containers for the transport and storage of goods and perishable goods such as pharmaceuticals and food respectively.

Beyond these refrigerated containers, the invention also extends to any enclosure requiring regular cleaning: washing, rinsing and / or disinfection. Examples of enclosures include, but are not limited to: containers, trailers, semi-trailers, cold rooms, wagons, tunnels, etc.

Prior art

The hygiene standards in force require the users of refrigerated containers, a systematic cleaning of any container after each unloading of perishable products (drugs or food).

Most often, this cleaning is performed by an operator using a device for spraying water under high pressure, this water optionally being supplemented with a detergent and / or a disinfectant. Such an operation is painful, very long and difficult to perform. For large fleets of road transport, this cleaning of refrigerated containers represents a huge cost for road hauliers.

To put an end to this situation, it has been proposed in the international patent application PCT WO2008 / 125659, a self-propelled carriage which is, on the one hand, movable in translation inside a chamber to be cleaned and which, d On the other hand, there is a cleaning block provided with: "a static washing nozzle for diffusing a pressurized and mist-washing liquid throughout the enclosure;" a rinsing head rotatable about a horizontal axis located in one of the longitudinal planes of the carriage, said head having three jet nozzles of a pressurized rinsing liquid, these nozzles being arranged and designed so that the jets they produce intersect at least partially; and a solenoid valve controlling the admission of the washing or rinsing liquid under pressure, either into the washing nozzle for the washing phase, or into the rotating rinsing nozzle for the rinsing phase.

The progress induced by this type of trolley is significant. Nevertheless, such a truck has not given rise to industrial and commercial exploitation and remains perfectible in terms of cleaning quality and speed of execution.

Technical problems to be solved and objectives of the invention

In this context, the present invention aims to satisfy at least one of the objectives listed below.

An essential objective of the invention is to improve one-piece, self-propelled and (semi) automatic trolleys for cleaning indoor enclosures, especially refrigerated containers, particularly in terms of cleaning quality and speed of execution. Another essential objective of the invention is to provide an improved internal speaker cleaning trolley, of the monobloc, self-propelled and robotized type, which is capable of reproducing the gestures of a manual operator in what he has of more efficient, while avoiding the drawbacks of such a manual method, namely slowness, lack of uniformity, high cost of water and energy and exposure to heavy and risky work, in particular.

Another essential objective of the invention is to provide a robotic trolley, monoblock self-propelled indoor cleaning of enclosures, including refrigerated containers, which allows a precise, secure, uniform and effective integral cleaning of such speakers, and without waste of time, manpower and water. Another essential object of the invention is to provide a trolley

(semi) automatic, monoblock self-propelled indoor cleaning of enclosures, including refrigerated containers, which allow, at a lower cost, to meet the regulatory requirements of hygiene to which are subject road carriers.

Another essential objective of the invention is to provide a robotic trolley, monobloc, self-propelled interior cleaning of enclosures, including refrigerated containers, allowing a uniform and systematic cleaning of different types of speakers, shape and shape. variable volume.

Another essential objective of the invention is to provide an indoor cleaning installation of enclosures, in particular refrigerated containers which satisfies the requirements referred to in the objectives mentioned above and which are applicable in various configurations adapted to the users' needs. , and in particular road hauliers. Another object of the present invention is to provide a method of cleaning indoor enclosures, including refrigerated containers, which is simple to implement, fast, economical, automated, robotic, which avoids laborious and dangerous manual work. , and that allows a uniform and systematic precision integral washing, with a lower consumption of water and energy.

Brief description of the invention

All or some of the above-mentioned objectives, among others, are achieved by the present invention which concerns, in the first place, a carriage for interior cleaning of enclosures, especially refrigerated containers, in particular those mounted on trucks. , this carriage preferably being of parallelepipedal general shape and of the type of those:

- »which are monobloc, self-propelled and automatic, and -> which include a cleaning block comprising: - a static washing nozzle for the diffusion of a washing liquid under pressure and in the form of fog throughout the enclosure ,

a rotating rinsing head about a horizontal axis (X, X) situated in one of the longitudinal planes of the carriage, this head having at least two, preferably at least three, nozzles for spraying a rinsing liquid under pressure, these nozzles being arranged and designed so that the jets they produce, intersect at least in part, - a solenoid valve controlling the admission of the washing liquid or pressurized rinse or in the washing nozzle for the washing phase, ie in the rotary rinsing head for the rinsing phase; characterized in that it is equipped

4 in its upper part, a front cleaning block, a rear cleaning block, a rotating lance on one side and a rotating lance on the other (opposite) side ,. the cleaning block or blocks may optionally be provided with a screen disposed above the rotary rinsing head (s) so as to prevent the projection of liquid on all or part of the ceiling of the enclosure; these lateral lances being each rotatable about an axis (Y, Y) perpendicular to the longitudinal plane (preferably the median longitudinal plane) containing the axis (X ₅ X);

4 and, replacing or complementing each of these lateral rotary lances, on each side of the carriage, at least one vertical side ramp extending from the lower part of the carriage at least to its upper part, preferably above ;

And in that it includes means for rotating the rotating heads of the blocks of front and rear cleaning and any rotating lateral lances, possibly means for pivoting vertical side ramps in the event that they are present, a connection to an external source of liquid, possibly a liquid buffer tank fed by said source external liquid, means for pressurizing said liquid to feed including rotary heads and any rotary side lances and / or any vertical ramps, a reserve of a washing product to be incorporated in the liquid to the using a metering pump to form the washing liquid, a motor for driving the driving wheels, members for guiding the movement of the carriage intended to come into contact with the chamber, front and rear end-of-stroke sensors of the carriage in the enclosure, an automated control unit of the operation of the carriage (preferably triggered by a remote control), an autonomous power source and / or a connection to an external power supply and a body. Preferably, this carriage also comprises at least one horizontal ramp, advantageously anterior, and disposed in the lower part of the carriage, close to the ground.

Preferably, this carriage (1) also comprises at least one horizontal ramp, preferably anterior, and disposed in the lower part of the carriage (1), close to the ground. This horizontal ramp can be fed by means of pressurizing liquid (or steam).

The improved trolley according to the invention is a fully automatic autonomous monobloc washing robot capable of controlling the travel of the trolley in the enclosure to be cleaned, the operation of the cleaning blocks, rotary lances and / or vertical lateral ramps and / or of the horizontal ramp (s), as well as washing, rinsing and disinfection cycles, and very efficient in terms of cleaning efficiency, production time and water consumption.

Secondly, the present invention relates to an indoor cleaning installation for enclosures, especially refrigerated containers, in particular those mounted on trucks, characterized in that it comprises a trolley according to the invention and: - »a nacelle truck transfer device for use on a truck container loading / unloading platform, this mobile platform (preferably on rails) on the platform between a storage location of the truck and the rear of the container to be cleaned, comprising:

• a platform surrounded by a parapet on its 3 sides except the one intended to be facing the back of the containers to be cleaned:

• a ramp for the entry and exit of the carriage disposed on the side of the platform to be facing the back of the container to be cleaned;

Possibly a locking means of the nacelle in an aligned position with the back of the container to be cleaned;

• possibly stops for the truck;

• alignment means (preferably a sliding rod) of the nacelle with the container to be cleaned; • possibly a retractor system for the line 17.1 'of liquid inlet and the electric cable 17.2' may be connected to the carriage; - »and / or a pivoting bracket, possibly elevating, for the transfer of the carriage, usable in washing station mode, and comprising a loading bridge / loading truck in and out of the container to be cleaned; → and / or a truck transport vehicle, usable in mobile service mode, and comprising a liftgate / unloading of the truck in and out of the container to be cleaned.

Thirdly, the invention relates to a method for cleaning the interior of enclosures, in particular refrigerated containers, in particular those mounted on trucks, characterized in that it consists essentially: o to implement the trolley according to the invention; o to bring the carriage into the enclosure being careful to place the front of the carriage facing the bottom of the enclosure and putting the rear of the carriage in abutment against the starting stop; o to connect the carriage to a source of liquid by means of a liquid supply line and possibly to an external source of electrical energy by means of an electric cable 17.2 '; o adjust the spacing of the guide members of the movement of the carriage to bring its free wheels in contact with the side walls of the enclosure; and to ensure that the algorithm according to the invention as defined below is executed, preferably using the installation according to the invention.

The installation and the method according to the invention have the same advantages as those mentioned above for the interior cleaning trolley of enclosures as defined above.

Definitions For the purposes of this presentation and without limitation:

The articles "one", "one", "the", "the", "of" concern both one and several units of the substantive with which they are associated; The horizontal corresponds to any plane parallel to the flat base of the enclosure (the floor or the floor) to be cleaned in which the carriage is intended to evolve as well as to the plane (s) containing the axes of the wheels supporting carriage.

The qualifiers "front" and "rear" used for the carriage and the enclosure refer in particular to the direction of movement of the carriage in the enclosure. The entry of the enclosure which is the starting point of the movement of the carriage and the place where can be located the opening possibly equipped with door (s), is at the rear. By definition, the front is the opposite of the enclosure, at the end of the carriage stroke in one direction. In the case where the enclosure is a closed enclosure, it is the bottom of the enclosure (front wall thereof).

The length of the carriage is for example determined by the forward / backward direction

The term "washing" refers to the implementation of a liquid that contains at least one detergent and / or disinfectant.

The liquid used is preferably water. This liquid can be replaced or associated with water vapor.

Detailed description of the invention

The cleaning trolley according to the invention is an autonomous mobile unit, which can be controlled from outside the enclosure to be cleaned, for example by means of a remote control in manual or automatic mode. It advantageously replaces an operator formerly responsible for manually cleaning the interior of such enclosures in difficult, unhealthy and extremely time-consuming and water-consuming working conditions, which is in perfect opposition to the imperatives of preserving the environment. environment. This carriage is preferably of parallelepipedal general shape.

Advantageously, the carriage comprises a frame supported by drive wheels, which can be driven by one or two gear motors servo-controlled to the automated control unit. This chassis is designed to support all the onboard equipment defined above and a body protecting all these elements from contact with water. It has been found desirable that the weight of the carriage be sufficient to ensure stability and good adhesion taking into account the constraints associated with the implementation of high pressures. Advantageously, this weight can be at least 200 kg, for example between 300 and 600 kg depending on the power of the selected high pressure, for example of the order of 500 kg The carriage comprises a front cleaning block and a block rear cleaning, of the type described in WO2008 / 125659. This type of cleaning block has the advantage of having both a static washing member and a rotary member. rinsing fed by the same source of liquid under pressure, which is added during the washing phase of a suitable detergent product.

The static washing nozzle advantageously has a cone-shaped opening, allowing the projection of a wash liquid mist (misting throughout the enclosure to be cleaned). The opening of each static washing nozzle, for example, consists of an interchangeable cone. Misting or diffusion of the washing product makes it possible to completely cover the surface of the enclosure to be cleaned. The washing product is constituted for example by an alkaline detergent foaming uniformly to this surface and acts for a time sufficient to obtain a great washing performance.

The rotary rinsing heads preferably comprise three terminal nozzles advantageously arranged on a dome so as to define at least three projection zones whose axes converge towards a point situated inside and on the axis of the dome. Advantageously, the projection nozzles can be adjustable so that the jets they produce and which intersect, have impacts on the walls of the enclosure (container) adapted thereto.

Remarkably, the sum of the angles αl2, α23, α31 (preferably equal) separating the two or three projection zones is equal to 360 °.

In addition, according to an advantageous characteristic of the invention, the angle formed between, on the one hand, the axis of each of the two or three projection zones and, on the other hand, a plane orthogonal to the axis of the dome is between 10 and 50 °, preferably between 15 and 30 °, and more preferably is of the order of 20 ° (for example plus or minus 3 °). The projection zones make it possible to define jets or conical projection beams. The particular arrangement of these zones makes it possible to interleave the jets or beams (advantageously conical) of projection of the rinsing liquid. The combination of such an interweaving of the projected jets with the rotation of the heads guarantees an optimal efficiency, thanks to the very large coverage thus obtained.

Preferably, the front and rear cleaning blocks are aligned. According to a first possibility, the carriage according to the invention is also provided with two lateral rotary lances which preferably comprise at each of their ends, a nozzle, preferably two nozzles together forming a substantially "Y" shaped end.

According to a second possibility, it is provided in addition to or instead of the lateral rotating lances, vertical side ramps provided with several nozzles directed towards the side walls of the enclosure. It is possible that these ramps are pivotally mounted about their vertical axis, so as to orient the nozzles not only to the side walls of the enclosure when the carriage moves in the enclosure, but also to the front wall of the enclosure. enclosure when the carriage is in abutment against the front wall of the enclosure. The pivoting of the ramps from the lateral orientation to the forward orientation can be controlled mechanically (or by a dedicated motorization) when the carriage reaches a stop against the front wall of the enclosure, and in the opposite direction when the carriage go backwards. According to a third possibility, at least one horizontal ramp, preferably one, is disposed at the front of the carriage close to the ground. This horizontal ramp is equipped with nozzles oriented towards the ground. Advantageously, the spray nozzles can be adjustable so that the jets (water or steam) they produce and which intersect, have impacts on the floor of the enclosure (container) adapted thereto. These lateral lances and / or the vertical lateral ramps and the horizontal ramp substantially improve the washing of the front / rear walls which are vertical and the floor when the enclosure is a parallelepiped, which is the case most of the time. The same applies to all the angles between the front and rear vertical walls, the vertical side walls, the floor and the ceiling of the enclosure. To optimize their operation, the front and rear rotary rinsing heads and the rotary side lances are provided with rotation means comprising an electric motor (preferably a geared motor for each rotary head and for each lateral lance).

According to an advantageous arrangement according to the invention, the axis (X, X) is the axis of rotation of the front rotary rinsing head and the rear rotating rinsing head; just as the axis (Y, Y) is the common axis of rotation of the rotating lateral lances.

Soils are firstly peeled off by the action of the washing product, then they are then easily discharged by the liquid (eg water) sprayed under high pressure by this multiplicity of nozzles on all four sides of the truck, or in the direction of the ground and some of which are crossed. At least the efficiency of a manual operator is achieved, but by significantly reducing the cleaning time and the liquid consumption, to achieve the same result.

In addition to the front / rear cleaning blocks, the lateral rotary lances and / or the ramps, the means for rotating the blocks and any lances and any means of pivoting the vertical lateral ramps -when these are present-, are also embedded on this carriage, a connection to a source of external liquid and all the piping necessary to convey the liquid between the various elements, possibly a liquid buffer tank, means for pressurizing the liquid, a reserve of detergent associated with a metering pump, a motor, preferably a motor on each side to drive the front and rear drive wheels, guide members and centering of the carriage in the enclosure, sensors or stops before and back end of race, an automated control unit, preferably remotely controllable and finally an autonomous source of electrical energy and / or a connection to an external power source, all contained in a bodywork perfectly protecting all these elements from contact with the washing / rinsing liquid.

According to one variant, the washing liquid may be replaced by steam under pressure. The ramps are particularly suitable for this variant. Compactness is one of the advantages of the cleaning trolley according to the invention. Its preferred general shape parallelepiped approaching the cube is part of this search for compactness.

The means for pressurizing the liquid comprise, for example, one or two, preferably two pump units, one of them being intended to feed front-rear cleaning blocks and the other the rotating lateral lances.

To ensure a front-rear movement and vice versa of the carriage, it is advantageously equipped with guide members, which allow to center in the enclosure. Preferably, the members for guiding the movement of the carriage comprise lateral free wheels whose axes are vertical during operation of the carriage, these wheels being mounted on a support whose spacing is adjustable in the direction (Y ₅ Y) in order to be able to bringing the free wheels in contact with the side walls of the enclosure, this support being preferably foldable and / or retractable against the sides of the carriage and / or removable and storable on the carriage when it does not work. The guide members make it possible to ensure a rectilinear progression of the carriage inside the enclosure, which is the guarantee of a good efficiency of the liquid spray nozzles. In addition, these guide members prevent the carriage from damaging the side walls of the enclosure. To this end, the freewheels are advantageously provided with tires of soft and soft material intended for contact with the side walls without any degradation. In a substantially parallelepiped shaped enclosure, it is preferable that the carriage is arranged so that its median longitudinal plane coincides with that of the enclosure.

Beyond the lateral guidance, there are provided on the carriage, front and rear sensors end of travel of the carriage in the enclosure which comprises one, preferably two push rods on the front face and on the rear face of said carriage.

These sensors can be of any suitable nature and known in itself. It may be for example sensors operating on the principle of the electrical contact, the photoelectric principle or the principle of wave reflection of any kind.

The buffer tank is optional but nevertheless preferred because it makes it possible to compensate for any variations in the flow rate of the liquid supply network. In addition, it allows a return of the overflows equipping the pumps pump units constituting the means for pressurizing the liquid. Naturally, the preferred engines are electric motors capable of equipping the carriage according to the invention. Alternatively, it could be for example air motors or water engines.

According to a remarkable feature of the invention, the carriage comprises a booster member 17.1 'of the liquid supply pipe and the electric cable 17.2' may be connected to the connections provided for this purpose, so as to avoid that said conduit and said cable drag on the ground at the rear of the carriage during its operation.

According to a preferred mode of implementation of the cleaning using the carriage according to the invention, the automated control unit of the operation of the carriage is designed and programmed to be able to execute: - either the algorithm (I): a . read the event corresponding to the contact of the rear end sensor (s) of the carriage, with the starting stop of the carriage; b. check that the truck has been connected to an external source of liquid using a liquid supply line; vs. possibly verifying that the reserve in washing product contains a predetermined sufficient level; d. controlling the admission of liquid into the carriage and optionally the filling of the buffer tank by means of a solenoid valve arranged, preferably downstream of the possible buffer tank; e. Controlling the metering pump to take the ad hoc dose from the detergent reservoir and introducing it into the liquid downstream of the pressurizing means to form the washing liquid; f. control the start of the means for pressurizing the liquid; boy Wut. controlling the admission of the pressurized washing liquid into each static washing nozzle by means of the solenoid valve provided for this purpose, so that the static washing nozzles diffuse the pressurized and fog wash liquid the entire enclosure; h. after a time tl of misting according to step g, control the start of the motor driving the drive wheels to drive the carriage forward translation, translation during which the misting according to step g continues; i. read the event corresponding to the contact of the sensor (s) before end of travel of the carriage, with the front wall (the bottom) of the enclosure to be cleaned; j. stop the cart; k. prolonging the misting according to step g, for a time t2 and then stopping the metering pump of step e, the pressurizing means of step f and the supply of washing liquid under pressure of each washing nozzle static using the solenoid valve provided for this purpose according to step g;

1. command the start of the engine driving the drive wheels to drive the carriage backward translation; m. read the event corresponding to the contact of the rear end sensor (s) of the carriage, with the starting stop of the carriage; not. stop the cart; o. ordering the start of the means for pressurizing the liquid and, by means of the solenoid valve provided for this purpose, the admission of the pressurized rinsing liquid into each rotary rinsing head and into each rotary lateral lance, if any , in the eventual vertical lateral ramps and in the possible horizontal ramp, so that they are supplied with rinsing liquid under a pressure of preferably between 30 and 160 bar, and more preferably still of the order of 140 bar; p. controlling the start-up of the rotating means (motors) of the rotating rinsing heads and any rotating lateral lances; q. after a time t3 of rinsing under pressure according to the steps o and p, to control the starting of the motor actuating the drive wheels to drive the carriage in translation towards the front, translation during which the rinsing under pressure according to the steps o and p continues; r. read the event corresponding to the contact of the sensor (s) before end of travel of the carriage, with the front wall (the bottom) of the enclosure to be cleaned; s. stop the cart; t. prolong the pressure rinsing according to the steps o and p for a time t4; u. commanding the start of the motor actuating the drive wheels to drive the carriage in translation backwards, translation during which the pressure rinsing according to the steps o and p continues; v. read the event corresponding to the contact of the rear end sensor (s) of the carriage, with the starting stop of the carriage; w. stop the cart; x. prolong the pressure rinsing according to the steps o and p for a time t5; there. controlling stopping means for rotating (motors) rotating rinsing heads and rotary side lances, and means for pressurizing the liquid; this algorithm of the automated control unit optionally comprising a complementary disinfection cycle, preferably by taking steps a to y and replacing the washing liquid with a disinfection liquid;

the algorithm (H): aa. read the event corresponding to the contact of the rear end of travel sensor (s) of the trolley, with the starting stop of the trolley; bb. check that the truck has been connected to an external source of liquid using a liquid supply line; this. possibly verifying that the reserve in washing product contains a predetermined sufficient level; dd. controlling the admission of liquid into the carriage and optionally filling the buffer tank by means of a solenoid valve preferably disposed downstream of the possible buffer tank; ee. Controlling the metering pump to take the ad hoc dose from the detergent reservoir and introducing it into the liquid downstream of the pressurizing means to form the washing liquid; ff. control the start of the means for pressurizing the liquid; gg. controlling the admission of the pressurized washing liquid into each static washing nozzle by means of the solenoid valve provided for this purpose, so that the static washing nozzles diffuse the pressurized and fog wash liquid the entire enclosure; hh. after a fogging time according to step gg., command the start of the motor driving the drive wheels to cause the carriage in translation forward, translation during which the misting according to step gg. continues; ii. read the event corresponding to the contact of the sensor or sensors before the end of travel of the carriage, with the front wall of the enclosure to be cleaned; not a word. stop the cart; hh. prolong the misting according to step gg. for a while then stop the metering pump of step ee., the pressurizing means of step f. and feeding the pressurized washing liquid of each static wash nozzle with the solenoid valve provided for this purpose according to step g; kk.1. possibly observe a delay to let the washing liquid act; kk.2 possibly ordering the start of the means for pressurizing the rinsing liquid and, using the solenoid valve provided for this purpose, the admission of the pressurized rinsing liquid into each rotary rinsing head, in each possible lateral rotary lance, and / or in each possible vertical lateral ramp and in the (if any) horizontal ramp (s), so that they are supplied with rinsing liquid under a pressure preferably between 30 and 160 bar, and more preferably still of the order of

140 bars; or steam kk3. optionally, controlling the start-up of the means for rotating the rotating rinsing heads and any rotating lateral lances, and / or possible pivoting means of the pivoting lateral ramps if they are present; 11. control the start of the engine driving the drive wheels to drive the carriage in translation backwards; mm. read the event corresponding to the contact of the rear end of travel sensor (s) of the trolley, with the starting stop of the trolley; nn. stop the cart; oo implement steps kk2 and kk3 if they have not been implemented before; pp control the start of the engine driving the drive wheels to drive the carriage forward translation; qq. read the event corresponding to the contact (s) before the end of travel of the carriage, with the front wall of the enclosure to be cleaned; rr. stop the cart; ss If this has not already been done in the previous step kk2, order the start of the means for pressurizing the liquid and, using the solenoid valve provided for this purpose, the admission of the liquid rinsing under pressure in the horizontal ramp (s) so that it (they) is (are) fed (s) in rinsing liquid under a pressure preferably between 30 and 160 bar, and more preferably still of the order of 140 bars; tt. control the start of the motor actuating the drive wheels to drive the carriage in translation backwards; uu. read the event corresponding to the contact of the rear end of travel sensor (s) of the trolley, with the starting stop of the trolley; w. stop the cart; ww. controlling the stopping of the means for rotating the rotating rinsing heads and any rotating lateral lances, and means for pressurizing the liquid; this algorithm of the automated control unit (16) possibly comprising a complementary disinfection cycle, preferably by taking steps kk2 to ww and replacing the washing liquid with a disinfecting liquid.

In this algorithm (II), it is possible to extend the pressurized rinsing by the ramp on the ground until the extraction of the washing robot from the enclosure is complete and placed on a transfer pod of the carriage; Regarding steps a., V., Yy., Mm. uu., it should be noted that the starting stop of the carriage can be either the rear door or the rear wall of the enclosure, or even a stop provided in front of the opening of the enclosure, for example on a transfer basket of the truck, on a pivoting bracket for the transfer of the truck or on a transport vehicle of the truck.

It goes without saying that this automated control unit can only work if and only if it is powered up (autonomous source: on-board battery (ies) and / or external source: connection).

Preferably, the times t1, t2, t3, t4 and t5 of the algorithm (I) are identical or different and are between 10 and 360 seconds, preferably between 15 and 180 seconds and even more preferably between 20 and 60 seconds. for example of the order of 30 seconds. Advantageously, the speed of progression of the carriage in the chamber can be between 0.1 cm per second to 100 cm per second, preferably between 1 cm per second and 20 cm per second, better still between 2 cm per second and 10 cm per second. cm per second, for example of the order of 6 cm per second.

To further optimize the cleaning of the interior of enclosures, the present invention also aims at a cleaning installation as defined above and which takes into account different configurations of use of the cleaning carriage. Indeed, the enclosure which may be a container or a refrigerated semi-trailer towed by a truck may be subject to cleaning in an environment comprising a loading dock, in an environment comprising an outdoor car wash (tracks and gantries rotating rollers and / or high pressure jets) or in an environment without special equipment.

Thus, the installation according to the invention proposes in particular a nacelle adapted to the first environment, an optionally lifting pivoting bracket adapted to the second environment, and a carriage transport vehicle for a mode of use in the mobile service adapted to the third environment.

In doing so, it is a question of offering users a simple, efficient and secure implementation, in a very limited total cleaning time of the order of 15 to 20 minutes per chamber of the container or refrigerated semi-trailer type.

In another of its aspects, the invention is directed to a method of cleaning the interior of enclosures as defined above and implementing the aforementioned carriage, or the installation mentioned above.

The following description sets out in detail the characteristics and advantages of the invention, in relation to the appended figures. This detailed description, while indicating preferred variants of the invention, is only provided for non-limiting illustrative purposes. Description of figures

Figure 1 shows a perspective view of three quarters left rear of a preferred embodiment of the carriage according to the invention.

Figure 2 is a perspective view from above and three quarters rear right of the carriage of Figure 1.

Figure 3 is a perspective view from above and left rear three quarters of the carriage according to Figure 1 deprived of a portion of its body elements. Fig. 4A is a perspective view of the front or rear cleaning block of the carriage of Fig. 1.

Figure 4B is a front view of Figure 4A.

Figure 4C is a longitudinal sectional view along the sectional plane B-B shown in Figure 4B. Figure 4D is a longitudinal sectional view along the sectional plane A-A shown in Figure 5B.

FIG. 5 is a perspective view of the installation according to the invention in three configurations: the unloading platform mode with transport basket, the optionally lifting and pivoting stem mode of the transfer of the trolley (washing station) and the vehicle mode trolley transportable in mobile service mode.

Figure 6 is a perspective view from above and three quarters forward right of the nacelle according to the first mode or the first configuration of the installation according to the invention.

FIG. 7 is a front view of the nacelle of FIG. 6.

The indoor speaker cleaning trolley conforming to the interior of enclosures according to a preferred embodiment of the invention is shown in FIGS. 1 to 3 in particular.

This carriage designated by the general reference 1 has a generally parallelepipedal shape, close to the cubic shape, which gives it compactness. This carriage 1 is monobloc, self-propelled and automatic.

It comprises a frame 2, preferably of metal, for example of stainless steel, supported by four pairs of drive wheels 3a, 3b, 3c, 3d, rotatable by two lateral electric geared motors 4a, 4b, via a set pulleys and transmission belts not referenced in the drawing.

The frame 2 is covered by a body 5, made for example of stainless steel sheet metal, and designed to prevent the washing and rinsing liquids from penetrating inside, and so as to promote the flow and evacuation of said liquids. The drive wheels 3a, 3b, 3c, 3d are arranged in two lateral shoulders 6a, 6b at the base of the carriage 1. These lateral shoulders 6a, 6b extend upwards by a parallelepiped block 7 comprising a central body 8 and a part superior 9.

This upper part 9 is equipped with a front cleaning block 10, a rear cleaning block 1 1, a rotating lateral lance 12a on one of its sides and a rotating lateral lance 12b on the other of its sides and / or two ramps 12'a, 12'b lateral vertical (Figure 1), able to pivot mechanically at the front end of the race in the chamber and having nozzles for spraying liquid or steam.

Each of these lances 12a, 12b has two ends in the form of "Y" whose branches are liquid spray nozzles.

These vertical lateral ramps (12'a, 12'b) are connected to the chassis 2 by bars (12'bl) and to the means for pressurizing the liquid (motor pumps 14a, 14b) by a flexible conduit 12 ".

The means for rotating the rotating rinsing heads of the front and rear cleaning blocks 11 and the rotating lateral lances 12a and 12b are geared motors 21.1, 21.2, 22a and 22b arranged on the chassis of the truck 1 in its part. 9. A gearmotor 21.1, 21.2, 22a, 22b is therefore provided for each rotary rinsing head and for each lateral lance 12a, 12b. These motors 21.1, 21.2 22a, 22b are slaved to the automated control unit 16. Inside the central body 8, the metal frame 2 supports:

• a buffer tank 13 of liquid fed by an external source of liquid;

• means for pressurizing the liquid consisting of two pump units 14a, 14b (high pressure pumps 1 to 150 bar for example), respectively disposed on the left side and on the right side of the central body 8 just above the shoulders lateral 6a, 6b;

• reserves 15.1 and 15.2 of detergent intended to be incorporated in the liquid using a metering pump not shown in the drawing;

and an automated control unit 16 for the operation of the carriage 1, preferably triggerable by means of a remote control The lower part of the carriage 1 which notably comprises on the sides, the shoulders 6a, 6b also comprise on its rear face , connection terminals 17 to an external source of liquid (terminal 17.1) and to an external power supply (terminal 17.2), respectively via a liquid supply line 17.1 'and through an electric cable 17.2 'The lateral faces of the lateral shoulders 6a and 6b are provided with guide members 18a and 18b for the movement of the carriage 1 intended to come into contact with the lateral vertical walls of the enclosure. 1 to 3, the guide members 18a and 18b each comprise two free wheels 23a and 23b mounted on a support 24 in the shape of "U", whose two branches are adjustable in length, so as to adapt the spacing of the freewheels 23a, 23b in the direction "YY", to be able to bring said free wheels in contact with the side walls vertical walls of the enclosure. The freewheels 23a, 23b are mounted on the transverse bar of the "U" support on vertical axes during the operation of the carriage 1 as shown in FIGS. 1 to 3. The freewheels 23a and 23b are equipped with tires made of flexible materials. and tender to bear on the side walls without damaging it. As shown in Figure 1 in phantom on the lateral shoulder 6b, the "U" supports 24 each carrying two freewheels 23a or 23b, can be disassembled to be stored in tubular housings 25 provided on the upper face of the shoulders 6a and 6b side, so as to arrange the support in the form of a "U" in a vertical plane, the axes of the freewheels 23a, 23b being horizontal (perpendicular to the median longitudinal plane of the carriage 1 comprising XX) in this storage position . These tubular housings 25 provided to receive the end of the lateral branches of the support "U" 24 have openings allowing the evacuation to accumulate inside said tubular housing.

In the same way, the rotary lateral lances 12a, 12b rotatable by geared motors 22a and 22b can be removed from the shaft of each of these geared motors 22a and 22b, so as to be arranged above the lateral shoulders 6a and 6b by depression in tubular housings of the same type as the tubular housing 25 provided for this purpose.

In this way, the guide members 18a and 18b, as well as the rotary side lances 12a, 12b are arranged so that the size of the carriage is limited, and therefore more suitable for storage. The lateral shoulders 6a and 6b also each have on their front face, two front sensors 19a, 19b and two rear sensors 19a, 19b, of end-of-travel detection of the carriage 1 in the enclosure. These sensors 19a, 19b are for example push rods with electrical contact.

As shown in Figure 3, a horizontal ramp 10 'equipped with liquid spray nozzles or steam directed towards the ground can be mounted on these forward end sensors 19a, 19b, at the front of the enclosure. A flexible conduit 10 "supplying liquid (vapor) of the ramp 10 'connects the latter to the means for pressurizing the liquid (motor pumps 14a, 14b).

In the vicinity of the terminals 17.1, 17.2 of connection 17, the lower part of the carriage 1 comprises a booster member 20 of the liquid supply pipe 17.1 'and the electric cable 17.2' which can be connected to the terminals 17.1, 17.2 of FIG. connection 17, so as to prevent said pipe and said cable drag on the floor of the enclosure at the rear of the carriage 1 during its operation. This booster organ 20 is an inverted "U" -shaped stem, whose free ends of the branches are pivoted on both sides of the connecting terminals 17. The inverted U-shaped booster member 20, which forms an angle of about 45 ° relative to the rear face of the carriage 1. The upper transverse bar of this booster member 20 is slightly bent inwards so as to form a chute on which the liquid pipe and the electric cable 17.2 'are intended to rest. .

FIGS. 4A to 4B show in detail the front or rear cleaning block 11 fitted to the carriage 1 according to the invention. These cleaning blocks 10 and 11 are also described in detail on page 7, line 26 to page 8 line 35 (see Figures 10 to 13 of PCT application WO2008 / 125659).

In FIGS. 4A to 4D, the general reference 101 denotes the front or rear cleaning block 11 of FIGS. 1 to 3. Each cleaning block 101 comprises a static washing nozzle 300 for diffusing a pressurized washing liquid. and in the form of a fog of the enclosure and a rotating rinsing head 400 about a horizontal axis (X, X) located in one of the longitudinal planes, preferably the median longitudinal plane of the carriage 1. This head flushing 400 is constituted by a cylindrical trunk 41 surmounted by a dome 42 equipped with three spray nozzles or nozzles 43.1, 43.2 and 43.3.

The static washing nozzle 300 and the rotating rinsing head 400 are disposed on the outer face of a cover 104 closing the smallest open end of a frustoconical casing 101, whose base of larger diameter is provided with a collar 102 in which are provided bores 103 for fixing the housing 101, with the aid of screws, on the front or rear face of the upper part of the carriage 1. The cover 104 is also secured with screws 105 on the body 107 of the frustoconical housing 101.

The static wash nozzle 300 is connected to a pressurized liquid supply via a line 90 shown in FIG. 5C, and has a projection opening 160 disposed at its free end 150. As shown in FIG. 5C , this projection aperture 160 is defined by the existing space (clearance) between a male end-piece 151 engaged in a complementary frustoconical crown 152 of the female type provided at the free end 150 of the static nozzle 300. This frustoconical tip 151 comprises a threaded internal extension 153 screwed inside the free end 150 of the static nozzle 300 in which is formed a plurality of channels 154 which communicate the opening 160 with the supply of liquid from the pipe 90 of the static nozzle 300. The screwing of the extension 153 in the free end 150 of the static nozzle 300, allows the adjustment of the projection of the washing liquid / detergent, preferably in the form of fog (misting) which diffuses throughout the enclosure and which is deposited uniformly on all of the interior surfaces of this enclosure.

The rinsing head 400 is rotatably mounted relative to a pipe 100 for supplying water to the rotating rinsing head. This line 100 is coaxial with the axis of rotation (X, X) of the rotary head 400. To ensure the sealing of this rotary rinsing head 400, are provided on the one hand, an annular seal 106 between the cover 104 of the frustoconical housing 101 and the cylindrical trunk 41 of the rotary rinsing head 400, and, secondly, an annular ball stop 107 disposed between the head of the pipe 100 formed by an annular rim 100.1 and a shoulder 41.1 of the cylindrical trunk 41 of the rotary rinsing head 400 (see Figures 4C and 4D). This cylindrical trunk 41 has at its base opposite the dome 42, a toothed pinion 80 which meshes with a driving gear 110 of the front gear 21.1 or rear 21.2, shown in Figure 3, the shaft 70 appears on the Figure 4D. The screws 81 make it possible to fix the toothed pinion 80 on the cylindrical trunk 41 (see FIG. The rotational speed of rotation of the rotary rinsing head 400 may, for example, be between

I and 20 rpm, preferably between 5 and 10 rpm.

This rotary rinsing head 400 has three effective zones 140.1, 140.2 and 140.3 of the rinsing, washing or disinfecting liquid. These three projection zones 140.1, 140.2 and 140.3 respectively have axes X1, X2 and X3 which converge at a point situated on the axis XX and inside the dome 42. This axis XX is the axis of rotation of the rotary rinsing head 400 and the axis of the pipe 100. The nozzles or nozzles 43.1, 43.2, 43.3 and therefore the projection openings 140.1, 140.2 and 140.3 respectively form angles α1.2, α2.3 and α3.1 (see Figure 5B). The sum of the angles α1.2, α2.3 and α3.1 is advantageously equal to 360 °. In addition, and preferably as shown in the example of FIG. 4B, these angles α1.2, α2.3 and α3.1 are all equal to about 120 °.

Moreover, it is apparent from FIG. 4D that the axis X3 of the nozzle 43.3 of the projection aperture 140.3 forms an angle of 20 °, for example, with the plane P orthogonal to the X-X axis. The same applies to the X.l and X.2 axes corresponding to the nozzles 43.1 and 43.2 (projection openings 140.1 and 140.2).

It should be noted that according to a variant of the angles X.3 / P and X.l / P and X.2 / P could be different from each other.

This particular arrangement in space and relative to each other nozzles or nozzles 43.1, 43.2 and 43.3 and their projection openings 140.1, 140.2 and 140.3 allows the jets produced to intersect, that is to say to merge at least in part. The jets are preferably conical beams. This results in optimized sprinkling of the floor, ceiling and walls of the enclosure.

As shown in FIG. 4D, the projection zone 140.3 of the nozzle or nozzle 43.3 is in the form of a cylindrical bore comprising an outer portion of larger diameter and shorter than the inner portion whose end communicates with the nozzle. interior of the dome 42 and with the pipe 100 for supplying the liquid. So is even for the projection openings 140.1 and 140.2 of the nozzles or nozzles 43.1 and 43.2 of the dome 42.

The nozzles or nozzles 43.1, 43.2, 43.3 each consist of a part comprising a larger-diameter outer head extended inwards by a threaded rod of smaller diameter screwed inside the dome 42. Each nozzle or nozzle 43.1 43.2, 43.3 is traversed by a projection channel 141.1, 141.2 and 141.3 which communicates the pipe 100 for supplying liquid under pressure with the outside and which makes it possible to produce bundles of liquid under pressure (projection) preferably conical. The pipes 90 and 100 for supplying water to the static washing nozzles 300 and to the rotating rinsing heads 400 respectively are connected to the outlet of the pumps belonging to the pump units 14a and 14b. The opening or closing of the pipes 90 and 100 is provided by at least one electro valve, not shown in the drawing. It may be for example a solenoid valve mounted on the outlet pipe of the high pressure pumps and of the type comprising a ball capable of moving under the effect of an electromagnet between two positions in each of which the ball obstructs the passage of the liquid to the supply line 90 or 100 of the static washing nozzle 300 or the rotary rinsing head 400.

FIG. 5 shows the three variants of the indoor speaker cleaning installation comprising the carriage 1 according to the invention, and corresponding to three configurations or modes of use, respectively: loading / unloading platform, washing station and mobile service.

In the right part of FIG. 5, corresponding to the "loading / unloading platform" configuration, there appears a loading / unloading platform 26 on which a nacelle 27 for transferring the carriage 1 according to the invention can circulate, preferably on rails 28, so as to be brought facing the rear of a semitrailer 29. The unloading dock 26 may also include a transfer nacelle storage warehouse 27 supporting the trolley 1. Such a warehouse n ' is not shown in Figure 5. In the middle part of this Figure 5, corresponding to the configuration "car wash", is shown a pivoting bracket 30, elevating and equipped with a bridge 31 supporting the carriage 1. This bridge 31 allows the transfer of said carriage 1 inside an enclosure consisting of a semi-trailer 32 whose interior is to be cleaned in a configuration or washing station mode. The bracket 30 may be associated with a roller washing station or high pressure from the outside of trucks.

This bracket 3 may be equipped with radar detectors and / or signal lights to properly position the rear of the truck of the container 32 or the refrigerated semi-trailer, in front of the bridge 31 of the bracket 30. In the left-hand part of FIG. 5, corresponding to the "mobile service" configuration, there is shown a vehicle 33 for transporting the trolley 1 equipped with a hatch 34 for loading / unloading the trolley 1 in and out of the container to be cleaned. , which could be the semitrailer 35 shown in FIG. 5. FIGS. 6 and 7 detail the structure of the trolley transfer pod 1 from a loading / unloading dock 29 of trucks up to the inside. said containers 29 discharged and cleaned. This nacelle 27 movable on rails 28 comprises a platform 36 encircled on its three sides, with the exception of that intended to be opposite the rear of the containers 29 to be cleaned, of a parapet 37, this platform shape 36 is supported by wheels 38 appearing in Figures 6 and 7. These wheels are intended to cooperate with the rails 28. The platform is also equipped with grating 39 on which the carriage 1 can be placed. There is also a ramp 40 for the entry and exit of the carriage 1 on and off the nacelle 27. This ramp is disposed on the side of the platform 36 intended to be opposite the rear of the container 29 to clean. This platform 36 is also equipped with a locking means of the nacelle in a position aligned with the rear of the container 29 to be cleaned. It may be for example a latch comprising a sliding bolt capable of being engaged in a bore provided on the platform 26 or on the rails 28. The platform 36 constituting the platform 27 is also equipped with a means alignment, preferably a sliding rod 41 disposed on the upper portion of the parapet 27 at the edge of the open side of the nacelle 27 intended to be opposite the rear of the container 29 to be cleaned. Once extended towards the container 29, this sliding rod 41 makes it possible to wedge the nacelle 27 in alignment with the opening of the container 29 to be cleaned. This nacelle 27 also comprises a reel system 42 disposed on the side of the bottom of the parapet 37 opposite the open side facing the opening of the container 29 to be cleaned. This retractor system 42 is intended for the electrical cable and the water supply pipe 17.1 'which are connected to the carriage 1 for cleaning. This retractor system 42 is designed to allow the elastic return of the electric cable 17.2 'and the water supply pipe 17.1' so as to prevent the carriage 1 from being obstructed in its travel by the cable or the pipe 17.1. water supply trailing on the floor of the enclosure (container 29), when the carriage 1 returns from the bottom of the enclosure (container 29) to its opening, which is the starting point.

Advantageously, the platform 36 of the nacelle 27 may also comprise stop blocks for the wheels 3a, 3b, 3c, 3d of the carriage 1, as well as the starting stop of the carriage 1, which stop is intended to come into operation. contact with the rear sensor (s) 19a, 19b of the carriage 1. In addition to the platform 26, this nacelle 27 can also constitute on the hatch 34 of loading / unloading of the carriage 1 equipping the transport vehicle 33 of the carriage 1.

The retractor system 42 of the nacelle 27 can also equip the bridge or the jib 30 or the tailgate 34 of the transport vehicle 33.

For interior cleaning of enclosures, especially containers 29,

32, 35, especially those mounted on trucks, it is therefore necessary to implement the carriage 1 by taking it into the enclosure to be cleaned, while making sure to place the front of the truck facing the bottom of the enclosure and placing the rear of the carriage 1 in abutment against the starting stop which can be either the door equipping the opening of the enclosure, or the nacelle 27 of the bridge 31 of the bracket 30 or tailgates 34 of the transport vehicle

33. The carriage 1 is then connected to a liquid supply pipe, for example water from the distribution network and to a source of electrical energy using an electric cable 17.2 ', the pipe and the cable being preferably arranged on a winder 42 with elastic return. It is then necessary to adjust the spacing of the guide members 22, so that the freewheels 23a, 23b bear against the vertical side walls of the enclosure, and finally, to start the execution of steps a. to there. by the automated steering unit 16.

The washing product used in the stores 15.1 and 15.2 on the carriage 1 is preferably a foaming and highly complexing alkaline detergent product. This product is advantageously compatible with food contact.

Rapid cleaning is carried out, economical and satisfying the hygiene standards in force, automatically, without human intervention, except for the establishment of the carriage and the launch of the cleaning process using a remote control.

Claims

-1- trolley (1) for cleaning indoor enclosures, especially refrigerated containers, in particular those mounted on trucks, this carriage (1) preferably being of generally parallelepipedal shape and of the type of those:

→ which are monobloc, self-propelled and automatic,

- »which comprise a cleaning block (10, 11) comprising:

a static washing nozzle (300) for diffusing a pressurized and mist-washing liquid throughout the enclosure, a rotatable rinsing head (400) around a horizontal axis (X); , X) located in one of the longitudinal planes of the carriage (1), this head having at least two preferably at least three spray nozzles (43.1, 43.2, 43.3) of a pressurized rinsing liquid, these nozzles ( 43.1, 43.2, 43.3) being arranged and designed in such a way that the jets which they produce intersect at least in part, - a solenoid valve controlling the admission of the washing or pressurizing liquid to the nozzle of washing (300) for the washing phase, either in the rotary rinsing head (400) for the rinsing phase; characterized

• in that it is equipped * in its upper part (9) a front cleaning block (10), a rear cleaning block (11), a rotating lance (12a) on one sides and a rotating lance (12b) on the other side ,. the cleaning block (s) (10, 11) may optionally be provided with a screen disposed above the rotary rinse head (s) (400) so as to avoid the projection of liquid on all or part of the ceiling of the enclosure; these lateral lances (12a, 12b) being each rotatable about an axis (Y, Y) perpendicular to the longitudinal plane (preferably the median longitudinal plane) containing the axis (X ₅ X);

4 and, instead of or in addition to each of these lateral rotary lances (12a, 12b), on each side of the carriage (1), at least one lateral vertical ramp (12a ¹ , 12b ') extending from the lower part the carriage (1) at least up to its upper part, preferably above;

And in that it includes means for rotating (21.1, 21.2, 22a, 22b) rotating heads (400) of the front (10) and rear (11) cleaning blocks and any rotating lateral lances (12a). , 12b), possibly means for pivoting the vertical lateral ramps in the event that they are present, a connection (17) to an external source of liquid, possibly a buffer tank (13) of liquid supplied by said external source of liquid, means of putting pressurized (14a, 14b) of said liquid for supplying the rotating rinsing heads (400), any rotary lateral lances (12a, 12b) and / or any vertical ramps (12'a, 12'b), a reserve ( 15.1, 15.2) of a washing product to be incorporated in the liquid by means of a metering pump to form the washing liquid, a motor (4a, 4b) for driving the drive wheels (3a, 3b, 3c, 3d), guide members (18a, 18b) for moving the carriage (1) intended to come into contact with the enclosure, front sensors (19a, 19b) and rear end-of-travel of the carriage ( 1) in the enclosure, an automated control unit (16) of the operation of the carriage (1), an autonomous power source and / or a connection (17) to an external power supply and a body (5).

-2- trolley (1) according to claim 1, characterized in that it also comprises at least one horizontal ramp (10 '), advantageously anterior, and disposed in the lower part of the carriage, close to the ground.

-3- Trolley according to claim 1, characterized in that the means for rotating the rotating rinsing heads (400) and any rotating lateral lances (12a, 12b) comprise an electric motor (21.1, 21.2, 22a, 22b ) for each rotary head (400) and for each lateral lance (12a, 12b);

-4- trolley (1) according to claim 1, characterized in that each rotary lateral lance (12a, 12b) comprises at each of its ends, a nozzle, preferably two together forming an end substantially shaped "Y".

-5- trolley (1) according to claim 1, characterized in that the guide members (18a, 18b) of the displacement of the carriage (1) comprise lateral freewheels (23a, 23b) whose axes are vertical during operation of the carriage (1), these wheels (23a, 23b) being mounted on a support (24) whose spacing is adjustable in the direction (Y, Y) so as to bring the freewheels (23a, 23b) into contact with the side walls of the enclosure, this support (24) being preferably foldable and / or retractable against the sides of the carriage (1) and / or removable and storable on the carriage (1) when it does not work.

-6- trolley (1) according to claim 1, characterized in that the front and rear sensors (19a, 19b) end of travel of the carriage (1) in the chamber comprise one, preferably two push rods on the front face and on the rear face of the carriage (1).

-7- trolley (1) according to claim 1, characterized in that it comprises a member (20) booster of the pipe (17.1 ') of liquid inlet and the electric cable (17.2') may be connected to the connections (17.1, 17.2) provided for this purpose, so as to prevent said pipe (17.1 ') and said cable (17.2') lying on the ground at the rear of the carriage (1) when of its operation.

-8- Trolley (1) according to claim 1, characterized in that the control unit (16) automated operation of the carriage (1) is designed to be able to execute the algorithm (I) or (II) as defined above.

-9- Interior cleaning installation for enclosures, especially refrigerated containers (29, 32, 35), in particular those mounted on trucks, characterized in that it comprises a carriage (1) according to any one of the Claims 1 to 8:

-> a basket (27) for transferring the carriage (1) used on a loading / unloading platform (26) of containers (29) of trucks, this mobile platform (27) (preferably on rails (28)) on the dock (26) between a storage location of the carriage (1) and the rear of the container (29) to be cleaned, comprising:

• a platform (36) surrounded by a parapet (37) on its three sides with the exception of that intended to be facing the rear of the containers (29) to be cleaned,

• a ramp (40) for the entry and exit of the carriage (1) disposed on the side of the platform (36) intended to be facing the rear of the container (29) to be cleaned; Possibly a locking means of the nacelle (27) in a position aligned with the rear of the container (29) to be cleaned;

• possibly stoppers for the carriage (1);

• means for aligning the nacelle (27) with the container (29) to be cleaned;

• optionally a winding system (42) for the line (17.1 ') of liquid inlet and the electric cable (17.2') connectable to the carriage (1);

→ and / or a bracket (30) pivoting, possibly elevating, for the transfer of the carriage (1), usable in washing station mode, and comprising a bridge (31) for loading / unloading the carriage (1) in and out the container (32) to be cleaned; → and / or a vehicle (33) for transporting the carriage (1), usable in mobile service mode, and comprising a hatch (34) for loading / unloading the carriage (1) in and out of the container to be cleaned.

-10- A method of cleaning indoor enclosures, including refrigerated containers (29, 32, 35), in particular those mounted on trucks, characterized in that it consists essentially: o to implement the carriage (1 ) according to any one of claims 1 to 8; o to bring the carriage (1) into the enclosure, making sure to place the front of the carriage (1) facing the bottom of the enclosure and putting the rear of the carriage (1) against the starting stop ; o to connect the carriage (1) to a liquid source by means of a liquid supply line (17. T) and possibly to an external electrical power source by means of an electric cable

(17.2 '); o adjusting the spacing of the guide members (18a, 18b) of the displacement of the carriage (1) to bring its freewheels (23a, 23b) 10 in contact with the side walls of the enclosure; and to ensure that the algorithm as defined in claim 8 is executed, preferably by means of the installation according to claim 9.

15