ES2827150B2 - Climatic chamber and lighting system for climatic chambers - Google Patents

Description

DESCRIPTION

Climatic chamber and lighting system for climatic chambers

Object of the invention

The present invention concerns, according to a first aspect, a lighting system for climatic chambers, its main function being to offer better lighting to climatic chambers and increase the useful life of said lighting system by integrating a ventilation system.

The invention also refers, according to a second aspect, to a climatic chamber that includes said lighting system.

Background of the invention

At present, in the automotive vehicle industry, the use of climatic chambers is common. Climatic chambers are facilities designed to simulate controlled conditions of temperature and relative humidity inside and carry out studies or climatic tests with which to verify the behavior, durability and quality of products and materials. For an example of the use of climatic chambers for the automotive sector, the climatic chambers in question allow a vehicle to be located inside, in order to carry out cycles of temperature changes that generally range between -40°C and 120°C. The lighting system is required to be able to carry out tests in situ and to observe the interior of the vehicles while the climatic tests are carried out.

Different lighting systems for said climatic chambers are known in the state of the art, in order to illuminate the motor vehicle arranged inside. In general, incandescent lamps are used since it is known that they do not experience problems with temperature ranges. Thus, the working temperature range of climatic chambers, used in automotive vehicle tests, does not affect the useful life of incandescent lamps.

On the one hand, it is known that the use of incandescent light presents certain drawbacks in this type of system, such as that this type of light makes it difficult to obtain actual measurements in the tests carried out. This is due to the fact that they emit radiation in a specific direction, so that on the one hand heat energy is introduced into the interior of the climatic chamber, reducing its energy efficiency. On the other hand, the materials or components of the vehicle on which the radiation directly affects, have a higher surface temperature than the materials or components that are not directly irradiated, therefore a homogeneous distribution of the temperature is not achieved. vehicle since the area where the light is directly irradiated has a different temperature, making it difficult to obtain reliable measurements and validation of tests.

On the other hand, it is known that LED lighting systems are especially sensitive to changes in temperature and that this implies a reduction in their useful life.

Lighting systems for climatic chambers are known, comprising the characteristics included in the preamble of claim 1. Where an oven is considered to be a type of climatic chamber.

Such is the case, for example, of the one described in patent document EP2233839, which comprises:

Furnace lighting for illuminating the interior of a muffle of a furnace, comprising at least one light source and a lens, preferably made of glass, arranged downstream of the at least one light source. A cavity closed by the body of the lens is provided, so that heat conduction from the interior of the oven towards said cavity where the at least one light source is located is reduced.

In the lighting system described in said patent document, the ovens have lighting systems to facilitate visual inspection of the interior space. Due to the comparatively high operating temperatures, the lifetime of conventional light sources is restricted. As a consequence, the light sources are frequently interchanged. In addition, many conventional oven lighting only provide comparatively dim illumination, so replacement of conventional lighting systems with LEDs is proposed. Since this type of lighting system is sensitive to changes in temperature, it is proposed to devise a hollow lens with an effective cavity to adequately protect the light source against the heat that prevails within the muffle during baking and the like. This in turn results in a long life of the light sources, facilitating maintenance and reducing the respective costs by allowing it to be evacuated or filled with a gaseous or liquid medium that promotes overall thermal resistance through the lens. . However, in this case we simply have the light source protected but it does not have its own means to dissipate the heat that is generated inside, for this the oven can include a heat sink that, in addition to eliminating the heat from the lighting of the oven coupled to it can be used to avoid thermal overload of light sources.

It is therefore necessary to offer an alternative to the state of the art that covers the gaps found therein, by providing a lighting system for climatic chambers that does not suffer from the drawbacks of heat accumulation inside the lighting. known and that can actively dissipate heat, in particular that lacks, among others, the drawbacks indicated above.

Description of the invention

The object of the present invention is to provide a lighting system for climatic chambers, suitable for lighting the interior of climatic chambers, where the lighting system is encapsulated and refrigerated, which solves the aforementioned drawbacks and presents the advantages that are described. describe below.

To this end, the present invention concerns, according to a first aspect, a lighting system for climatic chambers, comprising at least one light source, configured to illuminate the interior of the climatic chamber; at least one receptacle defining an interior cavity, where the at least one light source is arranged inside the at least one receptacle, where the at least one receptacle comprises:

• a substantially transparent surface, capable of allowing the light emitted by the at least one light source to pass into the climatic chamber,

• at least one outer wall, comprising materials with low thermal conductivity suitable for reducing the transfer of heat energy between the lighting system and the interior of the climatic chamber;

Unlike the lighting systems known in the state of the art, in that of the present invention, characteristically, there is at least one ventilation system configured to circulate air through the interior cavity of the at least one receptacle. Advantageously, the inclusion of a ventilation system specific to the lighting system allows the hot air inside the at least one receptacle to be recirculated towards an external environment, avoiding thermal changes both inside the receptacle itself and inside the climatic chamber. As previously mentioned, climatic chambers can work in a wide range of temperatures, simulating extreme cold and heat conditions. On the one hand, it is sought that there is no thermal transfer from the interior cavity of the receptacle to the climatic chamber, which can negatively affect both the precision of the tests carried out and the efficiency of the climatic chamber itself. On the other hand, it is sought that there is no thermal transfer from the climatic chamber to the interior cavity of the receptacle, which results in a prolonged useful life of the light sources, facilitating maintenance and reducing lighting costs.

In a preferred embodiment of the invention, the light source is at least one LED-type light emitter, preferably with a power greater than or equal to 90kW/h. Advantageously, by replacing halogen light emitters with LED-type light emitters, greater luminosity and an increase in light intensity are achieved. By way of example, the light intensity provided by LED light sources is approximately between 500 to 1000 Lux compared to the 27 Lux presented by halogen emitters. The aforementioned increase in light intensity makes it possible to achieve a sufficient level to carry out the necessary visual operations both outside and inside the vehicle, increasing the reliability of the tests and measurements carried out on the vehicle inside the chamber. In addition, the light radiation emitted by the LED light source does not heat, consequently heat energy is not introduced into its interior, achieving an increase in the cooling effectiveness of the climatic chamber and its energy efficiency.

According to one embodiment, the at least one receptacle comprises a front opening mechanism. For an implementation of said embodiment, the front opening mechanism preferably comprises a lower hinge and perimeter screws in stainless steel, where the perimeter screws are located on each of the edges of the receptacle. In this way, the tightness or thermal insulation of the receptacle is ensured with respect to the interior of the chamber to which while allowing easy access to the interior of the receptacle to be able to repair and/or change the light sources, as well as in case of fogging or dirt to be able to clean the substantially transparent surface. “Tightness” is understood as the quality of a system of being perfectly closed and avoiding thermal leaks, in this way it is possible to avoid the transfer of energy between the light source and the climatic chamber, increasing the performance of the chamber.

In a preferred mode of the invention, the substantially transparent surface is preferably glass. For an implementation of said exemplary embodiment, a double tempered glass pane is implemented with an air chamber arranged between both tempered glasses. Advantageously, double tempered glass is a type of glass that has high mechanical properties, such as resistance to withstand high temperatures without undergoing changes. Consequently, the interior of the receptacle is isolated from the temperature transferred by the climatic chamber, preventing the exchange of temperature and/or energy between the light source and the climatic chamber. In addition, the fact that the material is substantially transparent favors the passage of light through its surface, allowing the inclusion of light at all points inside the climatic chamber.

Thus, the receptacle is made up of a transparent front surface and external or side walls, together forming the interior cavity of the receptacle where the light source is housed. The term "outer wall" is understood as the surface that delimits and surrounds the at least one receptacle, with the exception of the transparent surface. These are preferably opaque walls. Preferably, the low thermal conductivity materials of the at least one outer wall of the receptacle comprise natural fiber materials. Natural fiber materials constitute a type of material that, due to its multidirectional fibrous structure, can house relatively immobile air inside. Consequently, said structure makes them good thermal insulators. In other words, with the use of this type of material it is possible to thermally insulate the receptacle from the at least one light source, avoiding the transfer of temperature and energy between the light source included inside the receptacle and the climatic chamber.

Preferably, the ventilation system comprises a thermostat, configured to activate and/or deactivate the circulation of air through the interior cavity of the at least one receptacle, and configured to activate the circulation of air if a temperature of work detected in the interior cavity of the at least one receptacle is greater than or equal to a predefined value.

By "predefined value" is meant a value set in advance. According to a preferred embodiment of the invention, the predefined value is a temperature value, preferably substantially 30°C, but it can be any other according to the technical requirements of the product. The functionality of the thermostat is to automatically activate the ventilation system when the receptacle temperature is not within the range set by the predefined temperature, that is, the temperature inside the receptacle cavity is higher than the predefined value. In other words, the thermostat detects if the interior of the enclosure is at the predefined temperature conditions and if not, it activates the ventilation system. The temperature increase inside the receptacle can be caused by two factors:

- by the heat generated by switching on the lighting system, or

- due to the temperature given by the climatic chamber.

As previously indicated, when the climatic chamber works in a range of high temperatures for a long period of time, for example temperatures above 80° for uninterrupted periods, there is a thermal transfer from the climatic chamber to the interior of the receptacle, producing an unavoidable increase in the internal temperature of the receptacle that can negatively affect the operation of the light sources. The forced air circulation activated by the thermostat will avoid a substantial increase in the temperature inside the receptacle, avoiding damaging the at least one light source.

For an implementation of said embodiment, the ventilation system is single flow. The operation of which consists in that by means of an extractor the hot air is extracted from the interior of the receptacle and this hot air is expelled to the outside environment. The term “outside environment” is understood to be the environment outside the climatic chambers and the receptacles of the climatic chambers themselves, that is, the space that is not subject to the working conditions of the described system. In the ventilation system described above, air drawn into the receptacle replaces air exhausted.

According to a preferred embodiment, the ventilation system comprises at least one air inlet duct and/or one air outlet duct. The air inlet duct connects the interior cavity of each receptacle with the outside environment and the air outlet duct connects the interior cavity of each receptacle with the at least one air extractor and, additionally, with the outside environment. Thanks to these ducts, an exchange of air is established between the interior of the receptacle and the external environment. Consequently, air circulation is facilitated and heating of the interior cavity of the receptacle is avoided, allowing it to work in optimal operating conditions and increasing the useful life of the at least one light source.

According to a variant of said implementation, the air inlet duct comprises a particulate filter, preferably a wadding filter, such as bamboo wadding, cotton wadding, soy wadding or fiber wadding, among others. Thanks to the use of a filter in the air inlet duct, the entry of solid particles from the outside environment and/or bacterial contamination is prevented, thus preventing the components inside the receptacle from getting dirty, such as the transparent surface. , in such a way that there would be a reduction in the light intensity that penetrates the interior of the climatic chamber.

Preferably, the air extractor arranged in the air outlet duct is configured to extract air from the interior cavity of the at least one receptacle towards the outside environment. In other words, it is intended to ensure the outlet of hot air from inside the receptacle to the outside environment.

According to the same objective, according to a second aspect, the present invention provides a climatic chamber that includes:

- a plurality of side walls and a roof, where the plurality of side walls and the roof define a closed interior space, suitable for housing a motor vehicle, and

- at least a lighting system for climatic chambers in accordance with what has been previously described.

According to a possible embodiment, the at least one receptacle that houses the at least one source light source is fixed to at least one side wall, where the at least one light source and the substantially transparent surface of each receptacle are arranged inclined in a predefined angular arrangement with respect to the side wall. With reference to the degree of inclination of the receptacles, it is intended to direct the light towards all areas of the vehicle to favor a homogeneous distribution of illumination and radiation.

According to a first embodiment, the receptacles are arranged on opposite side walls, where a single exhaust fan removes the air from the interior cavities of the two receptacles.

According to a second embodiment, the climatic chamber comprises four receptacles, each arranged close to each corner of the climatic chamber, and at least two air extractors, where each air extractor removes the air from the interior cavities of two receptacles.

In an alternative embodiment to said second distribution, each receptacle has its own air extractor to extract the air from its interior.

Surprisingly, the present invention provides a light source inside a receptacle and a ventilation system for the at least one light source, where the receptacle acts as a thermal insulator for the at least one light source, preventing exchange from occurring. of heat between the light source and the climatic chamber. On the other hand, the ventilation system allows the air inside the receptacle to be recirculated, avoiding thermal changes inside it and extending the useful life of the at least one light source. In addition, the lighting assembly described has the advantage that the ventilation system includes a thermostat that allows the activation/deactivation of air circulation inside the receptacle depending on the temperature at which it is found, preventing the al least one light source is affected by high temperatures. A possible realization of the climatic chamber also has an angular arrangement of the receptacles, which are intended to favor a homogeneous distribution of lighting.

Brief description of the figures

A preferred embodiment of the lighting system for climatic chambers claimed with reference to figures 1 to 3.

Figure 1 represents an elevation view of a climatic chamber with the interior lighting system, according to the present invention.

Figure 2 represents a schematic profile view of the lighting system for climatic chambers and, in particular, the distribution of the ventilation system of said lighting system, according to the present invention.

Figure 3 represents a schematic profile and sectional view of the air flow of the lighting system for climatic chambers, according to the present invention.

Description of the preferred embodiment

In view of the aforementioned figures and, in accordance with the numbering adopted, a preferred embodiment of the invention can be seen in them, which comprises the parts and elements indicated and described in detail below.

Figure 1 shows, schematically, a climatic chamber suitable for carrying out tests in the automotive sector. Thus, said climatic chamber is configured and dimensioned to be able to house a motor vehicle inside it. The climatic chamber allows the motor vehicle to be exposed to extreme temperatures for long periods of time, thus being able to verify the correct aging and condition of the materials that make up said motor vehicle, as well as the correct functioning of its electronic systems.

During the experimentation phases, it is necessary for operators to enter the interior of the climatic chamber (11) in order to analyze and verify the condition of the vehicle. For this, lighting systems are required to illuminate the interior of said climatic chambers. In the embodiment shown in figure 1, the lighting system is made up of four lighting modules, where each lighting module is made up of at least one light source (1) arranged in each upper corner of the climatic chamber, said climatic chamber having a rectangular or square base. Each light source (1) is arranged inside a receptacle (2), which allows the transmission of light into the climatic chamber (11). It is observed that other configurations may be equally valid, such as the arrangement of two light sources (1) and their corresponding receptacles (2) on the lateral sides of the climatic chamber.

According to the known problems of the state of the art, the light beams emitted by the light sources (1), especially when the light sources (1) are of the incandescent type, irradiate the exterior surface of the motor vehicle. Said irradiation produces a localized increase in the temperature of the vehicle components with respect to the general temperature inside the climatic chamber (11), negatively affecting the validity of the results and experiments carried out.

In addition to the problems previously exposed, there is a thermal exchange between the interior of the climatic chamber (11) and the interior cavity (3) of the receptacles (2). Thus, when the climatic chamber works at extreme temperatures for long periods of time, there is inevitably a heat transfer into said receptacles (2) that tends to equalize said temperatures. If the light sources (1) arranged in the interior cavity (3) of the receptacles (2) operate at temperatures outside their nominal range, their useful life and optimal operation are negatively affected.

For this, the present invention advantageously has a ventilation system as shown in greater detail in figures 2 and 3.

Figure 2 shows, by way of illustration, the lighting system of the climatic chamber, where a vertical section of the climatic chamber is shown. Said section shows a side wall (12) of said climatic chamber, the left side of said wall representing the interior of said climatic chamber (11) and, on its right side, the external environment (10).

The receptacle (2) comprising the lighting module is shown attached to said side wall, said receptacle (2) being inside the climatic chamber (11). In addition, the aforementioned receptacle (2) is separated from the side wall (12) and anchored to it through a horizontal support (13), where the horizontal support (13) connects the side wall (12) of the chamber. climate with the receptacle (2), keeping it suspended in a horizontal position. Consequently, localized illumination towards the orientation of the receptacle is achieved.

Alternatively, as can be seen in figure 3, the receptacle (2) can be integrated into said side walls (12) and into the roof of the climatic chamber (11). This arrangement of the receptacles (2) implies that they acquire a certain inclination with respect to the side wall (12), so that it is intended to achieve a homogeneous distribution of light inside the climatic chamber (11). Consequently, the distribution of Figure 3, since the receptacle (2) is in direct contact with the walls that define the climatic chamber itself, the energy exchange surfaces between both elements are minimized, thus achieving greater energy efficiency by the system.

The at least one receptacle (2) comprises a light source (1), where the light source is preferably LED-type light that is located in the interior cavity (3) of the at least one receptacle (2). Said at least one light source (1) may be arranged on a printed circuit board (PCB) that is operatively coupled with a controller having a control circuit including a drive circuit for the at least one light source for control the activation and deactivation of the different light emitters simultaneously or sequentially. The PCB can be any type of circuit board, including but not limited to any flexible PCB and/or rigid PCB. The controller may be arranged inside or outside of the lighting system.

As can be seen in figure 2, the receptacle (2) is made up of six walls. Said walls are defined by five outer walls, which delimit the inner cavity (3) together with an upper wall that make up the receptacle (2) and a front wall made up of the substantially transparent surface (4).

In a preferred embodiment of the invention, the substantially transparent surface (4) is a glass frame with dimensions within the 655x515x375 cm range of double glass with a 4-8-4 type air chamber, which is made up of a frame and a counterframe for easy disassembly.

As can be seen in figure 2, the substantially transparent surface (4) has a vertical orientation, so that light radiation is produced localized on the incident surface correlative to the orientation of the light source, so that radiation on the object. However, in figure 3 it can be seen how the receptacle is located with a certain inclination with respect to a vertical plane, achieving a homogeneous distribution on the incident object. Depending on the position of the receptacle (2), changes are experienced in the illumination of the climatic chamber as well as in the radiation on the object. Consequently, a homogeneous radiation of light on the object will affect to a lesser extent the results of the tests carried out on it.

In relation to the outer wall (7), it is the surface that frames the inner cavity and that is part of the fundamental structure of the receptacle (2). As an example, the natural fiber material used for the exterior wall is preferably 100mm thick rock wool panel with specific depth measurements. This type of material is a natural material, which acts as a thermal insulator at both low and high temperatures.

A preferred embodiment of the invention implies that a thermostat, not represented in the figures, is located in the interior cavity (3), so that when the thermostat detects that the temperature is greater than or equal to a predefined temperature, the ventilation system is automatically activated. Preferably, the preset temperature value is in a range greater than or equal to 30°C. In such a way that if, for example, the temperature in the interior cavity (3) of the receptacle (2), reaches a temperature greater than or equal to 30°C, the ventilation system is executed, while if the temperature is less than said preset temperature, the ventilation system is stopped. The increase in temperature in the interior cavity can be caused either by the heat generated by the light source (1) itself or by the heat given off by the climatic chamber.

In relation to the ventilation system, as can be seen in figure 2, it is made up of an air inlet duct (5) and an air outlet duct (6) that connect the interior cavity (3) of the receptacle ( 2) with the external environment (10). In a preferred embodiment of the invention, the ducts used are, for example, insulating pipes with a thickness of approximately 80-125mm made of galvanized sheet metal. In more detail, the external environment (10) is the entire surface outside the described system that is outside the walls of the climatic chamber. In addition, the air inlet duct (5) includes a particle filter (8) that prevents solid particles from entering the interior cavity (3) of the receptacle (2). In a preferred embodiment, the particle filter (8) used is a wadding filter, since thanks to its porosity it allows the absorption of solid particles from less to greater thickness and thickness.

In figure 3, the air flow of the lighting system for climatic chambers of the present invention can be observed schematically. As previously described, in the interior cavity (3) of the receptacle (2), a thermostat is located, not shown in figure 3 or in any of the figures of the present invention, which will be responsible for determining if the temperature of the interior cavity (3) of the receptacle (2) is lower, higher or equal to the predefined one. In the event that the thermostat detects that the temperature of the interior cavity (3) of the receptacle (2) is higher than the predefined temperature, then the ventilation system is automatically activated. Thus, it can be seen in figure 3 how the activation of the ventilation system takes place as follows:

1. Activation of the extractor automatically, by order of the thermostat, so that forced air circulation is generated

2. Forced air circulation takes place from the interior cavity (3) of the receptacle (2) through the air outlet conductor (6) that is connected to an air extractor (9), where it is expelled to the outside environment. (10). The main function of the air extractor (9) through the air outlet duct (6) is to redirect the flow of hot air accumulated in the interior cavity (3) of the receptacle (2) and expel it to the outside environment (10). ). The air extractor (9) works thanks to the help of a collector, thus ensuring the flow of a flow of air between the interior cavity (3) of the receptacle (2) and the external environment (10).

3. The flow of air extracted from the receptacle is occupied by a flow of air that enters from the external environment (10) into the interior of the interior cavity (3) of the receptacle (2) through the particle filter (8) through middle of the air inlet duct (5), where the light source (1) is located.

The aforementioned process is carried out as many times as until the interior cavity (3) of the receptacle (2) reaches the predefined temperature. In this way, an increase in the useful life of the light source (1) is achieved while avoiding the transfer and exchange of heat between the light source (1) and the climatic chamber.

Additionally, although it is not observed in the sections of figures 2 and 3, the surface substantially transparent (4) that forms part of the frontal opening mechanism allows frontal access to the interior cavity (3). The easy access to the interior cavity (3) of the receptacle (2) allows an operator to access the interior cavity (3) of the receptacle (2), for example, to clean the interior of the interior cavity (3) of the receptacle (2) preventing the accumulation of dirt inside it from hindering the functionality of the lighting system contained inside.

As can be seen in figure 1, and according to an example of embodiment, the climatic chamber has four receptacles (2), each arranged in the corners of the interior of the climatic chamber (11). On the one hand, the receptacles (2) located in the upper right corner and lower right corner share the same air extractor (9). Thus, the air outlet ducts (9) of both receptacles (2) lead the air from said receptacles (2) towards a first air extractor (9). Similarly, the receptacles (2) located in the upper left corner and lower left corner share the same air extractor (9), the air outlet ducts (6) lead the air from said receptacles (2) to a second air extractor (9).

Each interior cavity (3) of the receptacle (2) has its own independent air inlet duct (5), with its own particle filter (8) arranged between the air inlet duct (5) and the external environment (10). ). The aforementioned particle filter (8) prevents the entry of solid particles from the outside environment through the air inlet duct (5) into the interior cavity (3) of the receptacle (2).

At least two extractors (9) are connected and each extractor (9) through the air outlet duct (6) extracts the air from the interior cavities (3) of the receptacle (2).

Balloon List

Light source (1)

Receptacle (2)

Inner cavity (3)

Substantially transparent surface (4)

Air intake duct (5)

Air outlet duct (6)

Outer wall (7)

Particle filter (8)

exhaust fan (9

Exterior environment (10). Interior climatic chamber (11)

Side wall (12)

Horizontal support (13)

Claims (14)

1. A lighting system for climate chambers, comprising at least one light source (1), configured to illuminate the interior of the climatic chamber (11); at least one receptacle (2) defining an interior cavity (3), where the at least one light source (1) is arranged inside the at least one receptacle, where the at least one receptacle (2) comprises: - a substantially transparent surface (4), capable of allowing the light emitted by the at least one light source (1) to pass into the climatic chamber, - at least one outer wall (7), comprising materials with low thermal conductivity suitable for reducing the transfer of heat energy between the lighting system and the interior of the climatic chamber (11); where the lighting system comprises: - at least one ventilation system configured to circulate air through the interior cavity (3) of the at least one receptacle; characterized in that the at least one receptacle (2) comprises a front opening mechanism. 2. Lighting system for climate chambers according to the preceding claim, characterized in that the light source (1) is at least one LED-type light emitter. 3. Lighting system for climate chambers according to any of the preceding claims, characterized in that the substantially transparent surface (4) is preferably a tempered double-glazed glass with an air chamber arranged between both tempered glasses. 4. Lighting system for climatic chambers according to any of the preceding claims, characterized in that the low thermal conductivity materials of the at least one outer wall (7) comprise natural fiber materials 5. Lighting system for climatic chambers according to any of the preceding claims, characterized in that the ventilation system comprises a thermostat, configured to activate and/or deactivate the circulation of air through the interior cavity (3) from to least one receptacle (2). 6. Lighting system for climate chambers according to claim 5, characterized in that the thermostat is configured to activate air circulation if a working temperature detected in the interior cavity (3) of at least one receptacle (2) is greater than or equal to a predefined value. 7. Lighting system for climate chambers according to any of the preceding claims, characterized in that the ventilation system comprises at least one air inlet duct (5), such that it connects the interior cavity (3) of each receptacle ( 2) with the external environment (10). 8. Lighting system for climatic chambers according to any of claim 7, characterized in that the ventilation system comprises at least one air outlet duct (6), such that it connects the interior cavity (3) of each receptacle ( 2) with the external environment (10). 9. Lighting system for climatic chambers according to any of claims 7 or 8, characterized in that the air inlet duct (5) comprises a particle filter (8). 10. Lighting system for climatic chambers according to claim 8, characterized in that it comprises at least one air extractor (9) arranged in the air outlet duct (6), configured to extract air from the interior cavity ( 3) from at least one receptacle (2) towards the external environment (10). 11. A climate chamber, comprising: a plurality of side walls (12) and a roof, where the plurality of side walls (12) and the roof define a closed interior space, suitable for housing a motor vehicle, and at least lighting system for climate chambers according to claims 1 to 10. 12. Climatic chamber according to claim 11, characterized in that the at least one receptacle (2) that houses the at least one light source (1) is fixed to at least one side wall (12), where the at least one light source (1) and the substantially transparent surface (4) of each receptacle is inclined in a predefined angular arrangement with respect to the side wall (12). 13. Climatic chamber according to any of claims 11 or 12, characterized in that it comprises two receptacles (2) arranged on side walls (12) opposite each other, where a single air extractor (9) removes the air from the cavities. interiors (3) of the two receptacles (2). 14. Climatic chamber according to any of claims 11 or 12, characterized in that it comprises four receptacles (2), each one arranged close to each corner of the climatic chamber, and at least two air extractors (9), where each exhaust fan (9) removes air from the interior cavities (3) of two receptacles (2).