MXPA00009866A - Closing system for refrigerating chambers - Google Patents

Abstract

Said system comprises an insulated access door (6) which closes the chamber (4) by interacting against a frame (1) mounted above the entrance (2) of said chamber (4), and a fast-opening door consisting of a displaceable plate (8) and corresponding actuation means (9, 10). Said actuation means are mounted outside the chamber (4), The frame (1) has a longitudinal groove (7) allowing passage of the plate (8), said plate (8) closing the insulated door (6) in the front or in the back. The system also includes a shutting device (7) which closes the groove (7) to minimize temperature loss through said groove and means (71 and 161) for heating the groove (7), in addition to guides (16) on which theplate (8) is displaced to open or closed position.

Description

n CLOSING SYSTEM FOR REFRIGERATING CHAMBERS.

D E S C R I P C I O N OBJECT OF THE INVENTION The present invention relates to a closing system for cold rooms; that, being of the type of those that include an insulating access door that establishes a closure when acting against a perimeter frame mounted in the entrance of the chamber, and a door of rapid opening destined to minimize the changes of temperature while the door remains open insulator access to the camera; It has some constructive features that allow the quick opening door can be integrated into the frame of the insulating door by closing the camera together with ?? - "the former, being, however, its means of actuation on the outside of the chamber.

BACKGROUND OF THE INVENTION The cold rooms have a perimeter frame in the entrance spaces on which an insulating access door closes.

One of the problems to be solved in this type of refrigeration chambers is that when the insulating access door is opened, temperature variations occur inside the chamber; being able to cause different damages, like the deterioration of the products to conserve, temperature oscillations that can get to be serious for the merchandise that stores and the increase of the consumption of energy on the part of the refrigeration equipment. "3 Some of the most used solutions to solve this problem are based on the use of slat curtains formed by a plurality of sheets of plastic material, in the automation of the insulating door, which does not have a high speed of opening or closing, or in the use of quick opening doors, which facilitate access to the camera and at the same time reduce the exposure time of the camera to the external temperature due to its high opening-closing speed.

The sheet curtains are placed in the entrance opening of the chamber forming a barrier by deflfás of the insulating access door; these curtains when pushed by people, wheelbarrows or any other element, allow their entry or exit from the camera.

The main problems of these curtains are the ease of tearing when hooked on the transport trolleys and that, when they are transferred, they offer a rubbing resistance that can cause the fall of products, especially when they are stacked, for example on a wheelbarrow.

The doors of fast opening are composed of a flexible or rigid sheet, which when displaced by a means of actuation produces the opening or closing of the access hole.

These quick opening doors can be mounted indistinctly so that the sheet moves vertically or laterally and using different detection and automation systems.

The installation of these quick opening doors is carried out either inside the chamber, behind the insulating access door, or on the outside of the chamber. In the first case, the components and mechanisms for detecting and activating the rapid door will be inside the chamber, making the final cost of the system considerably more expensive, especially in the case of low temperature chambers.

In case the quick opening door is placed on the outside of the chamber, in front of the insulating door, it is necessary to mount a kind of pre-chamber that contains the insulating door inside, as well as the system for closing the same, which considerably complicates its assembly » DESCRIPTION OF THE INVENTION The patent FR-A-2.747.182 concerns a cold room locker in which the use of a fast door constituted by a laminar element with reinforcing bars, as explained, placed in front of or behind the door is contemplated. insulating door of access to the lock or cold chamber, operated by a maneuvering system and recogible on a drum, said system and drum being installed on the outside of the lock and of the cold room to which it gives access.

To solve these problems, the closing system for cameras has been devised which, taking advantage of the automatic doors with a quick opening, allows to assemble the means for actuating the same. On the outside of the camera, the film is closing between the insulating access door and the camera or vice versa and being able to take advantage of the insulating door frame for the guidance of the fast door.

According to the invention, this closing system is of the type comprising: a perimeter frame mounted on the entrance of the chamber, an insulating access door acting on the outer side of the frame forming the closure of the chamber and a a sheet that, when conveniently actuated, opens or closes the access opening to the chamber, the whole of the sheet and its motorization forming a rapid opening door intended to minimize the variation of temperature inside the chamber while it remains open. insulating door access to it. "t The system of the invention has the particularity that the perimctral frame of the entrance opening to the chamber has a front and a rear portion protruding from the wall of the chamber, sliding the sheet of the door of rapid opening by one or more slots located at any point on the threshold of the frame.

The system for collecting the sheet is conveniently mounted by means of a supporting structure on the outside of the cold room, and arranged f 'parallel to that lot! of the frame provided with the slot for the passage of the sheet The assembly of the system for collecting the film, as well as its motorization on the outside of the camera, prevents these elements from having to withstand the aggressions they would suffer inside the camera.

In order to minimize the variation of temperature through the slot through which the sheet passes, it has been foreseen that the system includes a shutter device for closing the latter.

Said sealing device can be composed of profiles integral with the sheet, by a device operable by the access insulating door or by the sheet itself, by an automatic device driven by external elements by flexible profiles mounted on the slot itself and which act permanently on the sides of the laser without impeding its movement.

It is envisaged that the system may include heating means intended to prevent the formation of ice both in the groove mentioned and in the guides of the sheet, since this could prevent the correct operation of the door of rapid opening.

DESCRIPTION OF THE FIGURES To complement the description that is being made and in order to help *: i to a better understanding of the features of the invention is attached to the present specification, as an integral part of it, a set of drawings, where with illustrative and non-limiting character has been represented Jo following: - Figure I shows a front view of a cold room provided with the closing system object of the invention and in which the sliding guide of the access insulating door has been partially represented. In this figure, two sections have been made on the frame to allow observation of the heating means of the groove and of the lateral guides.

- Figure 2 shows a profile view of the closure system sectioned by a vertical plane that passes through the middle area of the entrance to the chamber - Figure 3 ^ shows a schematic view of the bars of the sealing device arranged one on each side of the flexible sheet and slightly spaced vertically from the frame, - Figure 4 shows a detail of a variant embodiment of the sealing device of the slot for the passage of the sheet.

- Figure 5 shows a detail of another variant embodiment of the sealing device of the groove for the passage of the sheet.

PREFERRED EMBODIMENT OF THE INVENTION As it can be seen in the attached figures, the closing system object of the invention has a frame (X) mounted on the entrance hole (2) defined in the wall (3) of a refrigerating chamber, the interior of which is indicated by the reference (4).

An anterior portion of the frame (1) protrudes, towards the outside of the chamber (4), from the plane defined by the wall (3), a guide (5) on which an insulating access door is moved is fixed to said frame. (6), responsible for establishing the closure of the camera (4) when facing the frame (1).

The frame (1) presents superiorly, in the portion projecting from the wall (3), a longitudinal slot (7) for the passage of a flexible sheet (8) that is associated with. a rotary drum (9) on which it is rolled or unrolled depending on the direction of rotation of a motor (10) acting on it. The sheet (8), the drum (9) and the motor (10) form a rapid opening door whose purpose is to minimize the variation of temperature inside the chamber (4) during the time the door remains open access insulation (5).

When the sheet (8) is unwound, it closes the entrance (2), being inserted in relation to the front surface of the frame and therefore behind the position occupied by the door (6) in the closed position.

The motor (10), responsible for winding the sheet (8) in the drum (9), may be operated by different systems, which have not been represented by not considering their description of interest.

As can be seen in the figures, and especially in Figure 2, the drum (9) is arranged outside the chamber (4) and its mechanical support elements (11) are conveniently isolated from the guides by which the sheet (8) inside the chamber (4) to avoid conduction losses, producing a breakage of the thermal bridge between said elements, Since the slot (7) for the passage of the sheet (8) communicates ej interior of the | chamber (4) with the exterior, on the frame (1) is mounted a shutter device that closes said slot (7) when the insulating access door (or) is closed, minimizing the temperature variation. This slot (7) is i; capable of containing in its interior heating elements (71) that prevent the formation of ice by the difference in temperature between the interior and exterior of the chamber.

In the exemplary embodiment shown in FIGS. 2 and 3, the sealing device of the groove (7) is represented schematically by two parallel bars (14) which are arranged on the upper side of the frame (1), one on each side of the frame (1). the groove (7) and, therefore, one on each side of the sheet (8). At least one of these bars (14) can be moved by the action of a drive mechanism (15) that causes the approach of both bars (14) and the closing of the groove (7).

In the variant embodiment shown in figure 4, the sealing device of the groove (7) is represented by two profiles (12) fixed on the sides of the sheet (8). In the embodiment shown in Figure 5, the sealing device is formed by flexible profiles (13) fixed to the sides of the groove and acting permanently on the sheet (8) without preventing its movement.

On the vertical sides of the frame (1) there are defined guides (16) for guiding the sheet (8) in its movement towards the opening or closing position. These guides can have heating means (161) to prevent, if necessary, the formation of ice on them.

It is not considered necessary to make this description more extensive so that any expert in the field understands the scope of the invention and the advantages derived therefrom.

The terms eí? that this report has been written should always be taken in a broad and non-restrictive sense.

The materials, shape, size and arrangement of the elements will be susceptible to variation as long as this does not entail an alteration of the essential characteristics of the invention, which are claimed below. saw

Claims (9)

V "R E I V I N D I C A C I O N E S

1. - Closing system for cold rooms; of the type that comprise a perimeter frame (1) mounted in the entrance hole (2) of the cold room (4), an insulating access door (6) that establishes e | closure of the chamber (4) when acting on the frame (1), and a sheet (8) that when operated in extension or picked up by a driving element (10) is arranged in an open or closed position of the chamber (4), said sheet (8) and its means of actuation and collection support, external to the chamber (4), forming a rapid opening door intended to minimize temperature losses while the access door is still open (6) ); characterized in that the perimeter frame (1) integrates a portion projecting from the wall (3) of the chamber and having, on at least one of its sides, a longitudinal slit (7) for the passage of the flexible sheet (8) which, in the closed position, is arranged in a plane? the middle of the frame (1), and behind or in front of the access door (6), whose sheet (8) is guided by at least one groove (16) made in an inner side of the frame (1).

2. - Closing system, according to claim 1, characterized in that said perimeter frame located in the recess (2) entering the chamber (4) integrates a front and a rear portion projecting from the wall (3) of the chamber, - sliding the flexible sheet (8), guided, by one or several grooves (16) located at any point of the interior side of the frame, which access through a slit (7).

3. - Closing system, according to claim 1, characterized in that the protruding portion of the frame is a front portion and because it integrates vertical grooves (16), directly opposite prolongation of the slit (7), for guidance of the side edges of the sheet (8)

4. - Cycle system%, according to one of claims 1 to 3, characterized in that the collection support is constituted by a drum (9) associated with a motor (10), which are mounted on a support structure (11), above the frame (1) and conveniently isolated from the guide groove (16), which is at least one, through which the sheet (8) slides.

5. - Closing system according to one of claims 1 to 4, characterized in that it includes a sealing device in charge of closing the slit (7), minimizing the variation of temperature through it, when the chamber (4) is closed by the insulating access door.

6. - Closing system, according to claim 5, characterized in that the sealing device is composed of profiles (12) integral with the sheet (8).

7. - Closing system, according to claim 5, characterized in that the sealing device is formed by flexible profiles (13) fixed to the sides of the slit (7) and acting permanently on the sheet (8) without preventing displacement .

8. - Closing system, according to claim 5, characterized in that the sealing device of the groove (7) comprises two parallel bars (14), at least one of which is mobile, driven by an actuator mechanism governed by external elements, by the access door (6) or by the sheet (8) itself, and which separates or approaches said bars (14) determining respectively the opening or closing of the slit (7).

9. - Closing system according to one of claims 1 to 3, characterized in that the guide groove (16), which is at least one, for the guided movement of the sheet (8) has heating means (161) intended for to prevent the formation of ice on them. 10, - System, according to claim 1, characterized in that the slit (7) has heating means (71) intended to prevent the formation of ice in it. ¥?