Claims:1. A system (100) for dehumidifying a light casing (3) of a vehicle, the system (100) comprising:
a dehumidification unit (2), fluidly coupled upstream of the light casing (3), wherein the dehumidification unit (2) is configured to receive air through an inlet (1) and cool the air; and
a first flow creation device (6) fluidly coupled downstream of the light casing (3), wherein the first flow creation device (6) is configured to channelize the cooled air from the dehumidification unit (2) to a surrounding through the light casing (3),
wherein the cooled air dehumidifies the light casing (3).

2. The system (100) as claimed in claim 1, wherein the dehumidification unit (2) comprises:
a chamber (11), fluidly connected to the inlet (1);
a heat exchanging device (10) thermally coupled to at least a portion of the chamber (11), wherein the heat exchanging device (10) is configured to cool the air flowing through the chamber (11); and
a second flow creation device (18) fluidly connected downstream of the chamber (11), the second flow creation device (18) is configured to draw the air into the chamber (11) through the inlet (1) and deliver the cooled air to the light casing (3).

3. The system (100) as claimed in claim 2, wherein the heat exchanging device (10) is a Peltier device.

4. The system (100) as claimed in claim 1, wherein the dehumidification unit (2) comprises a plurality of fins (14b) and/or a plurality of baffles (14a) disposed in the chamber (11), wherein the plurality of fins (14b) and/or the plurality of baffles (14a) are structured to be in heat exchange communication with the air flowing through the chamber (11).

5. The system (100) as claimed in claim 4, wherein the plurality of fins (14b) and/or the plurality of baffles (14a) define a path for flow of the air inside the chamber (11).

6. The system (100) as claimed in claim 1, wherein the light casing (3) is at least one of a headlight casing and a taillamp casing.

7. The system (100) as claimed in claim 1 comprises at least one valve (5, 17a) fluidly disposed upstream of the first flow creation device (6) and a second flow creation device (18).

8. The system (100) as claimed in claim 7, wherein each of the first flow creation device (6) and the second flow creation device (18) is a suction device.

9. The system (100) as claimed in claim 1 comprises a control unit (9) communicatively coupled with the dehumidification unit (2), and one or more sensors (8) associated with the light casing (3).

10. The system (100) as claimed in claim 9, wherein the control unit (9) is configured to:
receive, a signal corresponding to deposition of vapours in the light casing (3), from the one or more sensors (8); and
regulate, the dehumidification unit (2), to dehumidify the light casing (3).

11. A vehicle comprising a system (100) for dehumidifying a light casing (3) as claimed in claim 1.
, Description:[001] TECHNICAL FIELD

[002] Present disclosure generally relates to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to dehumidification of a light casing in a vehicle. Further, embodiments of the present disclosure disclose a system for dehumidifying a light casing in a vehicle using a heat exchanging device.

[003] BACKGROUND OF THE DISCLOSURE

[004] Automotive industries are outrightly reliant on electrical systems for certain applications in a vehicular anatomy, owing to various intrinsic advantages of the electrical systems. Vehicles of present day have interfaced electrical components with communication capabilities to render them “smart” in all possible ways. The interfacing has eased the automotive manufacturers in terms of immediate identification and rectification of faulty components and malfunctioning of underlying circuitry through an active feedback communicated wirelessly. Nonetheless, the electrical systems need maintenance, replacement and constant upgrading to ensure durability of associated components, as well as the tasks performed by these components. Electrical systems behave peculiarly with changing physical conditions, such as changes in temperature, pressure, humidity, magnetic fields and so on.

[005] One such component which is prone to damage, malfunction and related technical difficulties is the automotive light system such as headlight system, day running light system, fog lamp systems, tail light system and the like. A headlight forms one of the crucial parts of safety systems which enables passengers to have a clear view of the path during driving, in conditions like darkness, misty/foggy conditions, alerting the vehicles ahead, and the like. A headlight, due to exposure to external environment, faces problems with respect to moisture accumulation or humidification under fluctuating temperature and pressure conditions. When the external temperature falls below the temperature of air within the headlight compartment, the vapor concentration in the air condenses on the inner surface of irradiating portion (lens) of the casing. This condensation not only disrupts normal irradiation of light beam through the lens, but also cause a refraction disturbance to passengers in vehicles approaching from the opposite direction. Another drawback is the breakdown of electrical elements like lamps inside the headlamp compartment due to prolonged accumulation of condensed droplets which may cause shorting of electrodes. The lamps inside headlight compartment, which are exothermic in nature, accelerate heating up of the air present within the casing, thereby increasing the rate of humidification or fogging of the vapours. Repeated fogging and defogging under fluctuating temperatures may leave a residue on the inner surface of the lens, obstructing the lens to greater extent. Associated metallic components in the compartment may also get corroded, rising the need for frequent replacement.

[006] Numerous solutions have been proposed in the past to address this issue. A conventional approach is to place one or more moisture absorbing units, such as desiccant packets (silica gel packets) or desiccant dehumidifiers. This approach requires replacement of the desiccant packets or desiccant dehumidifiers from time to time when they lose moisture absorbing capabilities. One other solution is to provide a fan to circulate fresh air inside the headlamp, or make the internal space vacuum sealed. Both these arrangements are “power hungry” which consume power constantly to keep inside of the headlight compartment cooler. Moreover, they may not completely be fool proof in mitigating the effects of corrosion or electrical shorting. Korean patent application No. 10 2016 0170845 discloses an apparatus which electrolyzes moisture accumulated in the casing by an electric discharge between two electrodes. The apparatus makes the headlight system expensive, power consuming, less compact and vulnerable to electric shorting despite its efforts to dehumidify the air.

[007] The present disclosure is directed to overcome one or more limitations stated above or other such limitations associated with the prior arts.

[008] SUMMARY OF THE DISCLOSURE

[009] One or more shortcomings of conventional systems are overcome, and additional advantages are provided through the system as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered as a part of the claimed disclosure.

In one non-limiting embodiment of the disclosure, a system for dehumidifying a light casing of a vehicle is disclosed. The system includes a dehumidification unit fluidly coupled upstream of the light casing. The dehumidification unit is configured to receive air through an inlet and cool the air. Further, a first flow creation device is fluidly coupled downstream of the light casing, where the first flow creation device is configured to channelize the cooled air from the dehumidification unit to a surrounding through the light casing. The cooled air dehumidifies the light casing.

In an embodiment of the disclosure, the dehumidification unit includes a chamber fluidly connected to the inlet, and a heat exchanging device thermally coupled to at least a portion of the chamber. The heat exchanging device is configured to cool the air flowing through the chamber. Further, a second flow creation device is fluidly connected downstream of the chamber, with the second flow creation device configured to draw the air into the chamber through the inlet and deliver the cooled air to the light casing. The heat exchanging device is a Peltier device.

[010] In an embodiment of the disclosure, the dehumidification unit comprises a plurality of fins and/or a plurality of baffles disposed in the chamber. The plurality of fins and/or the plurality of baffles are structured to be in heat exchange communication with the air flowing through the chamber. Also, the plurality of fins and/or the plurality of baffles define a path for flow of the air inside the chamber

[011] In an embodiment of the disclosure, the light casing is at least one of a headlight casing and a taillamp casing.

[012] In an embodiment of the disclosure, the system comprises at least one valve fluidly disposed upstream of the first flow creation device and a second flow creation device. Further, each of the first flow creation device and the second flow creation device is a suction device.

[013] In an embodiment of the disclosure, the system comprises a comprises a control unit communicatively coupled with the dehumidification unit, and one or more sensors associated with the light casing. The control unit is configured to receive a signal corresponding to deposition of vapours in the light casing from the one or more sensors, and regulate the dehumidification unit to dehumidify the light casing

[014] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.

[015] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

[016] BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

[017] The novel features and characteristics of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a mode of use, further objectives and advantages thereof, will be best understood by reference to the following detailed description of an embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:

[018] FIG. 1 illustrates a schematic view of a system for dehumidifying a light casing of a vehicle, in accordance with an embodiment of the present disclosure;

[019] FIG. 2 illustrates a schematic view of a dehumidifying unit of the system of FIG. 1, in accordance with an embodiment of the present disclosure;

[020] FIG. 3 illustrates a Peltier device of the dehumidifying unit of FIG. 2, in accordance with an embodiment of the present disclosure,

[021] FIG. 4 illustrates a sectional view of a chamber enclosed in the dehumidifying unit of FIG. 2, in accordance with an embodiment of the present disclosure,

[022] FIG. 5a illustrates a front view of a second variant of the chamber enclosed in the dehumidifying unit, in accordance with an embodiment of the present disclosure,

[023] FIG. 5b illustrates a sectional perspective view of the chamber of FIG. 5a, with an enlarged sectional view of the chamber exit line, in accordance with an embodiment of the present disclosure, and

[024] FIG. 6 is a graphical illustration of variation of Inlet mass fraction and Exit mass fraction of vapours in the air as a function of time attained by the system of FIG. 1, in accordance with an embodiment of the present disclosure.

[025] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the systems illustrated herein may be employed without departing from the principles of the disclosure described herein.

[026] DETAILED DESCRIPTION

[027] While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[028] It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various features of the system, without departing from the scope of the disclosure. Therefore, such modifications are considered to be part of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skilled in the art having benefit of the description herein. Also, the system of the present disclosure may be employed in variety of vehicles such as passenger vehicles, commercial vehicles having different specifications. However, the other components associated with the light casing are not illustrated explicitly in the drawings of the disclosure for the purpose of simplicity.

[029] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a system, a method, an assembly, or a device that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such a system, a method, an assembly, or a device. In other words, one or more elements in the system or the method or the assembly or the device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or the method or the assembly or the device.

[030] Embodiments of the present disclosure disclose a system for dehumidifying air inside a light casing, like a headlight casing, of a vehicle. The system encompasses a dehumidification unit capable of receiving air through an inlet and cool the incoming air. The flow of air into the dehumidification unit is brought about by a first flow creation device, such as a suction device, which is located downstream of the dehumidification unit. The first flow creation device creates a suction to draw the air into the dehumidification unit where it undergoes a cooling effect, and thereafter, channelizes the air to surroundings i.e., outside. The dehumidification unit includes an arrangement to cool or remove moisture from the air, whose features are discussed in the forthcoming paragraphs in detail. The air so cooled or dried inside the dehumidification unit passes through the light casing, where it brings down the temperature of air trapped in the light casing, thereby dehumidifying the light casing.

[031] The dehumidification unit in the system intended to dehumidify the light casing includes a heat exchanging device, like a Peltier device, which works on the principle of Peltier effect or Thermoelectric heat pump effect. Cooling side of the heat exchanging device is in thermal contact with a chamber, into which the air is pulled by the second flow creation device. Heat is removed from the air so pulled into the chamber, by the cooling side of the exchanging device. The chamber may also include a plurality of baffles or a plurality of fins or both to enhance heat removal, and consequently, for moisture removal from the air. The plurality of baffles and/or fins which may extend at one or more angles with respect to orientation of the chamber may guide the air to define a flow path inside the chamber.

[032] The system further includes a control unit which is communicatively interfaced with the dehumidification unit and one or more sensors provided in the light casing. The one or more sensors detect a humid condition i.e., condensation or precipitation of vapors in the light casing, and give a signal corresponding to deposition of vapors, to the control unit. The control unit, based on the inputs received from the one or more sensors, regulates the dehumidification unit, and optionally, the first and second flow creation devices. This is intended to adjust the output of the dehumidification unit and the first flow creation device to perform the dehumidification procedure with minimum possible power consumption, and to attain other associated advantages.

[033] The following paragraphs describe the present disclosure with reference to FIGS.1 to 6. In the figures, the same element or elements which have similar functions are indicated by the same reference signs.

[034] FIG. 1 portrays a schematic of the system (100) for dehumidifying a light casing (3) of a vehicle incorporating a dehumidification unit (2). Humidity, defined as overall concentration extent of water vapours in the atmospheric air, may be accompanied with reversible phase transformation under varying temperature and pressure conditions. When the temperature drops, vapour condenses or precipitates back to liquid droplets (known as fogging or misting), and reversibly, may change back to vapour state when temperature increases again. Humidity is exemplified by Relative humidity (RH), which may be defined as the amount of water vapour in the air at a temperature relative to maximum amount of water vapour that the air can hold at the same temperature. Thus, it is apparent that warm air contains more vapour concentration than cold air. Dehumidification, therefore, involves reducing temperature of the air to gradually dry the air by removing the vapour content. Dehumidification is also interchangeably recognized by the terms “defogging” or “demisting”, and may be considered as one of the crucial features incorporated in the automotive systems for safety reasons.

[035] A light casing (3), like a headlight casing or a tail lamp casing, requires continuous dehumidification due to fluctuating temperature conditions of the environment. To accomplish this, the system (100) includes a dehumidification unit (2) disposed upstream and in fluid communication with the light casing (3). A light casing (3) may include a transparent or substantially transparent cover called lens. The lens having optical properties is intended to direct a beam of light emitted by a light source positioned in the light casing (3). The light source (not shown) may include an electric lamp which may be a bulb (filament) based, Light emitting diode (LED), Compact-Florescent based (CFL), halogen based or incandescent. The lens aids in directing the emitted light through refraction, scattering and other optical phenomena. The lens exposes to external environment on one side (outer surface), and conceals an opening at the front of the light casing (3) to form a closed space on the other side. The light casing (3) together with lens, light source, reflectors, turn indicators, projector lens and associated components form a light assembly. The interior surfaces (not shown) of the light casing (3), particularly lens, is susceptible to condensation or precipitation of vapours present in the air, due to rise in temperature of the air inside the light casing (3) more than the ambient temperature. It is to be understood that throughout the specification, the term light casing (3) has been consistently used, and dehumidification of light casing (3) indicates dehumidification of one or more associated components like lens, reflectors, light source, projector lens etc., which constitute the light assembly and exposed to humidity conditions. The rise in temperature inside light casing (3) may be attributed to heat generated by the light source, fall in temperature outside the vehicle during cold weather conditions, lack of air circulation inside the light casing (3) and so on.

[036] Further, as shown in FIG. 1, the light casing (3) is in fluid communication with a downstream located first flow creation device (6), like a suction device, for example. In an embodiment, the first flow creation device (6) creates suction to draw the air into the dehumidification unit (2) via inlet (1), and then channelize the drawn air through the light casing (3). The inlet (1) may be exposed to atmosphere directly or connected to a different line which is exposed to atmosphere to draw the air. The light casing (3) may also include one or more sensors (8) communicatively interfaced with it, to detect conditions inside the light casing (3) such as temperature, pressure, condensation/precipitation of vapours and so on. The one or more sensors (8) may transmit signals corresponding to a detected condition like temperature, pressure, or deposition of vapours/droplets (humidification) of inside the light casing (3), to a control unit (9) associated with the lighting system.

[037] Reference is now made to FIG. 2 which illustrates the dehumidification unit (2) which brings about dehumidification of the light casing (3). The dehumidification unit (2) includes a chamber (11) in fluid communication with the inlet (1) and adapted to receive air through the inlet (1). The chamber (11) has an arrangement to cool down the air entering it, and to guide the air to towards the light casing (3) for dehumidification purposes. The chamber (11) may also include a vent (15) for removal of water or venting out undelivered air. Further, at least a portion, including but not limited to a wall of the chamber (11), may be in thermal communication with a heat exchanging device (10), as shown in FIG. 2. The heat exchanging device (10), as the name suggests, is designed to remove heat from the air flowing through the chamber (11). In an embodiment, the heat exchanging device (10) is a Peltier device (12) which works on a thermoelectric principle known as “Peltier effect”. Although Peltier device (12) is a preferred type of heat exchanging device which may be deployed for the dehumidification system of the present disclosure, other heat exchanging arrangements like a refrigeration loop and conventional heat exchangers may be employed.

[038] The air whose heat content is removed (and consequently cooled or dried) by the heat exchanging device (10), flows towards a downstream disposed second flow creation device (18). The second flow creation device (18) may be a suction device which pulls the cooled air from the chamber (11) and delivers it to the light casing (3) via delivery line (2a). In an embodiment, the first flow creation device (6) and the second flow creation device (18) include, but not limited to a first suction fan (6a) and a second suction fan (18a), powered by respective motor units (6b) and (18b). In an alternate embodiment, the first and second flow creation devices (6, 18) may be pumps having impellers (6a, 18a) and motor units (6b, 18b). Further, the combined effect of both the first and second flow creation devices (6, 18) may result in suction and delivery of air between the inlet (1) and delivery line (7). Additionally, the downstream line (17) of the chamber (11) may be provisioned with one or more valves like direction, pressure and flow control valves (17a) to control directional, pressure and flow characteristics respectively of the cooled air. In an embodiment, the valve (17a) is a non-return valve which prevents backflow of air into the chamber (11). The cooled air delivered by the second flow creation device (18) into the light casing (3) combined with suction effect of the first flow creation device (6) causes the cooled air to circulate inside the light casing (3). The circulation of cooled air inside the light casing (3) inhibits or suppresses the deposition of vapours (precipitation or condensation of vapours) on the surfaces of components inside the light casing (3), including the lens. The first flow creation device (6) also expels the air present in light casing (3) via light casing outlet (4) and delivery line (7) to make way for new cooled air coming from the dehumidification unit (2) intended towards dehumidification of the light casing (3).

[039] FIG. 3 illustrates an exemplary Peltier device (12) in accordance with an embodiment. The Peltier device (10) in thermal communication with the chamber (11), as shown in FIG. 2, includes a cold side (12b) and a hot side (12a). The cold side (12b) forms a thermal contact with the chamber (11), so that heat and moisture is incessantly removed from the air flowing inside the chamber (11), whose flow direction is indicated by FP. In other words, the air flowing in flow direction FP inside the chamber (11) loses heat to the cold side (12b) of the Peltier device (12) as its flows in the chamber (11). A Peltier device (12), designed to accomplish thermoelectric cooling using Peltier effect, works as a thermoelectric heat pump which transfers heat from a low temperature region to a higher temperature region. The hot side (12a) and the cold side (12b) serve as electrodes to which a voltage is applied. In an exemplary embodiment, alternating p and n-type semiconductors (12c) may be sandwiched between the hot side (12a) and cold side (12b), so that the p and n-type semiconductors are electrically in series and thermally in parallel between the sides (12a, 12b).

[040] When voltage is applied at hot side (12a) and cold side (12b) serving as electrodes, due to different electron densities of p and n-type semiconductors, current flows across the junction of semiconductors (12c). The flow of current causes temperature difference, and the heat generated (as well as absorbed) by the cold side (12b) is transported to the hot side (12a) to constitute a thermoelectric heat pump effect. Continuous heat removal from the cold side (12b) renders the cold side (12b) to be implemented as a cooling device/unit for practical applications. In the present case, the cold side (12b), due to its continuous cooling characteristics, removes heat from the air flowing through the chamber (11) in the direction FP. In an embodiment, the hot and cold sides (12a and 12b) of the Peltier device (12) may be thermally conducting plates having high thermal conductivity. In another embodiment, the p and n-type semiconductors (12c) are selected from a class of thermoelectric materials having high electrical conductivity and low thermal conductivity (to prevent heat transfer from hot side (12a) to cold side (12b)), including, but not limited to silicon-germanium, lead telluride, bismuth telluride and bismuth antimony alloys. Furthermore, the cross-section and length of each of the semiconductors (12c) may influence heat transfer rate between the cold and the hot sides (12b and 12a). Also, the hot side (12a) may be attached to a heat sink via elements (13), so that the hot side (12a) may remain at ambient temperature conditions. In an embodiment, a number of Peltier devices (12) may be cascaded together for enhanced cooling.

[041] FIG. 4 illustrates a first exemplary design of the chamber (11) of the dehumidification system (100), according to an embodiment of the present disclosure. The chamber (11) receives air from the inlet (1), and then, the air passes through a plurality of baffles (14). The baffles (14) define a flow path (FP) (shown in FIG. 2) for air movement besides enhancing heat transfer rate between the air and the heat exchanging device (10). In an embodiment, the plurality of baffles (14) provide fin effect or extended surface effect to increase convective heat transfer from the air to the chamber (11), and implicitly to the heat exchanging device (10). With an increase in surface area of the baffles (14), convective heat transfer coefficient may be increased. In an embodiment, the baffles (14) may extend transversely or at an angle with respect to the direction of air flow. The air cooled by combined cooling effect of heat exchanging device (10) and convective heat transfer of the baffles (14) flows into the light casing (3) via downstream line (17) of the chamber (11).

[042] FIGS. 5A and 5B illustrate an exemplary design of the chamber (11) of the dehumidification system (100). The sectional view of chamber (11), as shown in FIG. 5B, illustrates a plurality of baffles (14a) and a plurality of fins (14b) extending from one of the walls of the chamber (11) in the air flow path. The combination of baffles (14a) and fins (14b) result in a further enhancement of the convective heat transfer from the air to the chamber (11). The baffles (14a) and fins (14b) compel the air to traverse a path along the surface contour of each of the baffles and fins, during which the transient, convective heat transfer rate is improved. The air so cooled by the collective effect of fins, baffles (14b, 14a) and the heat exchanging device (10), is let into the light casing (3) via downstream line (17). A permeable member (11a) like a sponge may be provisioned at the bottom of the chamber (11) to vent out water or undelivered air out of the chamber (11). Further, the enlarged sectional view (17C) of the downstream line (17) of FIG. 5B illustrates a descent chamber (17b). The descent chamber (17b) is intended to absorb residual water droplets or moisture coming out of the chamber (11) during start of the system (100), or at any time instant during system (100) operation. The presence of descent chamber (17b) ensures that no residual moisture (like moisture present in the air which is not dehumidified) goes into the light casing (3).

[043] Now reference is again made to FIG. 1 to illustrate an operational embodiment of the system (100) with respect to the dehumidification unit (2), control unit (9) and one or more sensors (8). The one or more sensors (8) may include but not limited to temperature sensors, pressure sensors, humidity sensors or hygrometers, or an integrated sensor which performs one or more of the above-mentioned detecting operations. The one or more sensors (8) detect a characteristic, for example, humidity inside the light casing (3) and transmits a signal corresponding to the detected value of humidity to the control unit (9). The control unit (9) picks up the signal and accordingly regulates the operation and output of the dehumidification unit (2), heat exchanging device (10) in particular. For instance, if a humidity sensor is interfaced with the light casing (3), it detects humidity level inside the light casing (3) and inputs the humidity value (for example, RH) to the control unit (9). The control unit (9), based on the received input, may regulate the voltage value given to the heat exchanging device (10) (in case it is a Peltier device) to adjust the cooling rate of the cooling side (12b) to meet the cooling requirement of the air. For a high level of humidity in the casing (3), the voltage value of the Peltier device (12) is adjusted so as to attain maximum cooling rate of the cooling side (12b), so that optimum quantity of heat is removed from the air flowing in the chamber (11) by the cooling side (12b). After removal of heat, the cooled air is delivered to the light casing (3) to dehumidify the inner surfaces of light casing (3). In alternate embodiment, the one or more sensors (8) may detect a condition like temperature or pressure of the air inside the light casing (8), and transmit a signal corresponding to detected temperature and pressure. Based on the signal input by the sensors (8) i.e., temperature or pressure values, the control unit (9) may assess the extent of humidity in the casing (3), and accordingly alter the cooling rate of the cooling side (12b) through voltage regulation. In an embodiment, the control unit (9) may also be interfaced with the first flow creation device (6) and the second flow creation device (18) to regulate flow characteristics like flow pressure and flow rate of the air in the system (100).

[044] FIG. 6 is a graphical illustration of variation of the inlet and exit mass fraction variation with time. Mass fraction is the ratio of mass of a constituent to the total mass of a mixture in which the constituent is present. As apparent from FIG. 6, the inlet mass fraction curve is constant with time which indicates that the air which is drawn from atmosphere into the system (100) has more or less same water vapour (humidity level) concentration in it. This air, being warm air, has more water vapour concentration than cooler air. Thus, it can be said that the inlet mass fraction of water vapour relative to the air is time independent. On the other hand, the exit mass fraction values are gradually decreasing with slope having a downward trend from start time to end time. This shows that the overall water vapour concentration (or mass) in the light casing (3) may be subsided transiently or a in a time dependent manner by implementing the dehumidification system (100) disclosed in the present disclosure. The transient response of the exit mass fraction of water vapour may further be optimized through management of operational features of various components in the system (100), regulated by the control unit (9).

[045] In an embodiment of the disclosure, the control unit (9) (like an ECU) may be a centralized control unit, or a dedicated control unit associated with the lighting system of the vehicle. The control unit may be implemented by any computing systems that is utilized to implement the features of the present disclosure. The control unit may be comprised of a processing unit. The processing unit may comprise at least one data processor for executing program components for executing user- or system-generated requests. The processing unit may be a specialized processing unit such as integrated system (bus) controllers, memory management control units, floating point units, graphics processing units, digital signal processing units, etc. The processing unit may include a microprocessor, such as AMD Athlon, Duron or Opteron, ARM’s application, embedded or secure processors, IBM PowerPC, Intel’s Core, Itanium, Xeon, Celeron or other line of processors, etc. The processing unit may be implemented using a mainframe, distributed processor, multi-core, parallel, grid, or other architectures. Some embodiments may utilize embedded technologies like application-specific integrated circuits (ASICs), digital signal processors (DSPs), Field Programmable Gate Arrays (FPGAs), etc.

[046] In some embodiments, the ECU may be disposed in communication with one or more memory devices (e.g., RAM, ROM etc.) via a storage interface. The storage interface may connect to memory devices including, without limitation, memory drives, removable disc drives, etc., employing connection protocols such as serial advanced technology attachment (SATA), integrated drive electronics (IDE), IEEE-1394, universal serial bus (USB), fiber channel, small computing system interface (SCSI), etc. The memory drives may further include a drum, magnetic disc drive, magneto-optical drive, optical drive, redundant array of independent discs (RAID), solid-state memory devices, solid-state drives, etc.

[047] It is to be understood that a person of ordinary skill in the art may develop a system or a device of similar configuration without deviating from the scope of the present disclosure. Such modifications and variations may be made without departing from the scope of the present invention. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents.

[048] Equivalents:

[049] With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.

[050] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system (108) having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system (108) having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.” While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

[051] Reference Numerals:

System 100
Inlet 1
Dehumidification unit 2
Delivery line of dehumidification unit 2a
Light casing 3
Light casing outlet 4
Valves 5, 17a
First flow creation device 6
Fan and motor of first flow creation device 6a, 6b
Delivery line 7
One or more sensors 8
Control Unit 9
Heat exchanging device 10
Chamber 11
Permeable member 11a
Peltier device 12
First and second side of Peltier device 12a and 12b
Elements of Peltier device 13
Baffles 14
Baffles, Fins 14a, 14b
Vent 15
Downstream line 17
Enlarged view of downstream line 17C
Descent chamber 17b
Second flow creation device 18
Fan and motor of second flow creation device 18a, 18b
p-type semiconductor P
n-type semiconductor N
Flow path FP