] Embodiments of the present invention generally relate to dual purpose fans and particularly to a system and method for controlling weather-based fans especially wall fans.
Description of Related Art
[002] Wall fans have become very popular in recent years. However, problems have developed in relation to operations of the fans. For example, traditional fans are often left on when occupants leave large spaces with the wall fans. Thus, the fans can consume unnecessary power in unoccupied large spaces. Another problem occurs when new occupants arrive to the large spaces and they have to search for switches and/or over-hanging chains to turn on the fans. Manual switching of the fans in crowded areas or the large spaces such as seminar halls and conference rooms is a nuisance and disruptive to overall atmosphere. Therefore, people are looking forward for automation in their day-to-day to overcome the aforementioned issues.
[003] Conventionally available systems are connected with internet facilities for automation. However, such systems are not feasible in remote areas as in an absence of internet connectivity, the existing systems can cause a problem. Moreover, the existing systems work with air condition systems, but none of the systems are working with dual-purpose wall fan systems.
[004] There is thus a need for an advanced and more effective system and method for controlling weather-based fans that can administer the drawbacks faced by the conventional systems.

SUMMARY
[005] Embodiments in accordance with the present invention provide a system for controlling weather-based fans. The system comprising: an occupancy sensor installed at various places in large spaces. The occupancy sensor is configured to sense a level of infrared radiations. The system further comprising: fan coil units installed at the various places in the large spaces. The fan coil units comprise: humidity sensors configured to sense a humidity of a surrounding area in the large spaces. The fan coil units further comprise temperature sensors configured to sense a temperature of the surrounding area in the large spaces. The system further comprising: a control unit configured to: receive the sensed level of infrared radiations, the sensed humidity and the sensed temperature from the occupancy sensor, the humidity sensors and the temperature sensors respectively; compare the sensed level of infrared radiations with a first pre-defined level of infrared radiations and a second pre-defined level of infrared radiations; compare the sensed humidity obtained from the humidity sensors with a first pre-defined level of humidity, a second pre¬defined level of humidity and a third pre-defined level of humidity, when the sensed level of infrared radiations deviates from the first pre-defined level of infrared radiations, and equal to the second pre-defined level of infrared radiations; activate fans of the fan coil units having the sensed humidity lies within a range of the first pre-defined level of humidity at a medium speed; activate the fans of the fan coil units having the sensed humidity lies within the range of the second pre-defined level of humidity at the medium speed; activate the fans of the fan coil units having the sensed humidity lies within the range of the third pre-defined level of humidity at a low speed; compare the sensed humidity obtained from the humidity sensors with a fourth pre-defined level of humidity, a fifth pre¬defined level of humidity and a sixth pre-defined level of humidity, when the sensed level of infrared radiations deviates from the first pre-defined

level of infrared radiations and the second pre-defined level of infrared radiations; activate the fans of all the fan coil units at a full speed, when the sensed humidity is greater than the fourth pre-defined level of humidity; activate the fans of the fan coil units having the sensed humidity lies within the range of the fifth pre-defined level of humidity at the full speed; and activate the fans of the fan coil units having the sensed humidity lies within the range of the sixth pre-defined level of humidity at the medium speed.
[006] Embodiments of the present invention may provide a number of advantages depending on its particular configuration. First, embodiments of the present application may provide a system for controlling weather-based fans.
[007] Next, embodiments of the present invention may provide a system that controls weather-based fans on different modes, wherein a selection of the mode is either on a basis of temperature or humidity of a particular space.
[008] Next, embodiments of the present invention may provide a system that is provided with a dual-purpose fan for summers and winters with sensors and a heating coil.
[009] Next, embodiments of the present invention may provide a cost-effective system as it contains a humidity sensor, a temperature sensor, and a heating coil in an existing wall fan in halls or seminar halls.
[0010] These and other advantages will be apparent from the present application of the embodiments described herein.
[0011] The preceding is a simplified summary to provide an understanding of some embodiments of the present invention. This summary is neither an extensive nor exhaustive overview of the present invention and its various

embodiments. The summary presents selected concepts of the embodiments of the present invention in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other embodiments of the present invention are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and still further features and advantages of embodiments of the present invention will become apparent upon consideration of the following detailed description of embodiments thereof, especially when taken in conjunction with the accompanying drawings, and wherein:
[0013] FIG. 1 illustrates a block diagram depicting a system for controlling weather-based fans, according to an embodiment of the present invention;
[0014] FIG. 2 illustrates components of a control unit of the system, according to an embodiment of the present invention;
[0015] FIG. 3 depicts a flowchart of a method for controlling fans based on a sensed humidity by using the system, according to an embodiment of the present invention; and
[0016] FIG. 4 depicts a flowchart of a method for controlling the fans based on a sensed temperature by using the system, according to an embodiment of the present invention.
[0017] The headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description or the claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words "include",

"including", and "includes" mean including but not limited to. To facilitate understanding, like reference numerals have been used, where possible, to designate like elements common to the figures. Optional portions of the figures may be illustrated using dashed or dotted lines, unless the context of usage indicates otherwise.
DETAILED DESCRIPTION
[0018] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.
[0019] In any embodiment described herein, the open-ended terms "comprising", "comprises", and the like (which are synonymous with "including", "having", and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of, "consists essentially of, and the like or the respective closed phrases "consisting of", "consists of", the like.
[0020] As used herein, the singular forms "a", "an", and "the" designate both the singular and the plural, unless expressly stated to designate the singular only.
[0021] FIG. 1 illustrates a block diagram depicting a system 100 for controlling weather-based fans (116a-116n), according to an embodiment

of the present invention. According to embodiments of the present invention, the system 100 may be configured to automatically control a speed of the fans (116a-116n) based on weather-based parameters such as, but not limited to, a temperature, a humidity, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the weather-based parameters. In an embodiment of the present invention, the system 100 may comprise an occupancy sensor 102, fan coil units 104a-104n (hereinafter collectively referred to as the fan coil units 104 and individually referred to as the fan coil unit 104), a control unit 106, and a memory 108. The occupancy sensor 102, the fan coil units 104, the control unit 106, and the memory 108 may be connected to each other through a network 110.
[0022] According to an embodiment of the present invention, the network 110 may include a data network such as, but not limited to, the Internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Metropolitan Area Network (MAN), and so forth. In some embodiments of the present invention, the network 110 may include a wireless network, such as, but not limited to, a cellular network and may employ various technologies including an Enhanced Data Rates for Global Evolution (EDGE), a General Packet Radio Service (GPRS), and so forth. According to an embodiment of the present invention, the occupancy sensor 102, the fan coil units 104, the control unit 106, and the memory 108 may be configured to communicate with each other by one or more communication mediums connected to the network 110. The communication mediums may include, but not limited to, a coaxial cable, a copper wire, a fiber optic, a wire that comprise a system bus coupled to a processor of a computing device, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the communication mediums, including known, related art, and/or later developed technologies.
[0023] The occupancy sensor 102 may be installed at various places in

large spaces such as, a marriage hall, a seminar hall, a conference hall, and so forth, to sense a level of infrared radiations, in an embodiment of the present invention. The occupancy sensor 102 may be connected to control unit 106 to transmit the sensed level of infrared radiations to the control unit 106. The occupancy sensor 102 may be, but not limited to, an ultrasonic sensor, a microwave sensor, a Passive Infrared (PIR) sensor, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the occupancy sensor 102 including known, related art, and/or later developed technologies.
[0024] The fan coil units 104 may be installed at the various places, in an embodiment of the present invention. Further, each of the fan coil units 104 may comprise humidity sensors 112a-112n (hereinafter collectively referred to as the humidity sensors 112 and individually referred to as the humidity sensor 112), temperature sensors 114a-114n (hereinafter collectively referred to as the temperature sensors 114 and individually referred to as the temperature sensor 114), the fans 116a-116n (hereinafter collectively referred to as the fans 116 and individually referred to as the fan 116), heating coils 118a-118n (hereinafter collectively referred to as the heating coils 118 and individually referred to as the heating coil 118).
[0025] The humidity sensor 112 may be configured to sense a humidity of a surrounding area in the large spaces, in an embodiment of the present invention. The humidity sensor 112 may be configured to transmit the sensed humidity to the control unit 106, in an embodiment of the present invention. The humidity sensor 112 may be, but not limited to, a hygrometer, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the humidity sensor 112, including known, related art, and/or later developed technologies.
[0026] The temperature sensor 114 may be configured to sense a

temperature of the surrounding area in the large spaces, in an embodiment of the present invention. The temperature sensor 114 may be configured to transmit the sensed temperature to the control unit 106, in an embodiment of the present invention. In an embodiment of the present invention, the temperature sensor 114 may be, but not limited to, a thermocouple, a resistance temperature detector (RTD), a thermistor, a semiconductor-based integrated circuit (IC) based sensor, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the temperature sensor 114, including known, related art, and/or later developed technologies.
[0027] The fan 116 may be installed within the fan coil unit 104, to provide a cool air and/or hot air to the surrounding area, in an embodiment of the present invention. In an embodiment of the present invention, the fan 116 may be operated at a pre-defined speed based on an output generated by the control unit 106. The fan 116 may be, but not limited to, a centrifugal fan, a propeller fan, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the fan 116, including known, related art, and/or later developed technologies.
[0028] The heating coil 118 may be installed within the fan coil unit 104, to convert electrical energy into heat that may be supplied by the fan 116 to the surrounding area of the corresponding large places, in an embodiment of the present invention. The heating coil 118 may be, but not limited to, a metal heating coil, a ceramic and semiconductor heating coil, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the heating coil 118, including known, related art, and/or later developed technologies.
[0029] The control unit 106 may include suitable logic, instructions, circuitry, interfaces, and/or codes for executing various operations, such as receiving sensed data, and control the fan coil units 104 accordingly.

The control unit 106 may be configured to perform operations associated with the system 100 by communicating commands and/or instructions. The control unit 106 may be, but not limited to, a microprocessor, a development board, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the control unit 106 including known, related art, and/or later developed technologies. Further, components of the control unit 106 may be explained in conjunction with FIG.2.
[0030] Further, the memory 108 may be configured to store the suitable logic, the instructions, the circuitry, the interfaces, and/or the codes of the control unit 106. The memory 108 may be, but not limited to, a non-volatile memory, a volatile memory, an optical disk, a magnetic disk, a Random-Access Memory (RAM), a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a FLASH-EEPROM, and so forth. Embodiments of the present disclosure are intended to include or otherwise cover any type of the memory 108 including known, related art, and/or later developed technologies that may be capable of data storage and retrieval.
[0031] FIG. 2 illustrates the components of the control unit 106 of the system 100, according to an embodiment of the present invention. The components may be, a data receiving module 200, a comparison module 202, a fan control module 204, and a heat control module 206.
[0032] The data receiving module 200 may be configured to receive the sensed level of infrared radiations from the occupancy sensor 102, in an embodiment of the present invention. The data receiving module 200 may also be configured to receive the sensed humidity and the sensed temperature from the humidity sensors 112 and the temperature sensors 114 respectively, in an embodiment of the present invention. The data

receiving module 200 may be configured to transmit the sensed level of infrared radiations, the sensed humidity and the sensed temperature to the comparison module 202.
[0033] The comparison module 202 may be configured to compare the sensed level of infrared radiations with a first pre-defined level of infrared radiations and a second pre-defined level of infrared radiations. The comparison module 202 may be configured to operate in a first mode, when the sensed level of infrared radiations deviates from the first pre-defined level of infrared radiations, but equal to the second pre-defined level of infrared radiations. The first mode may represent a partial occupancy mode, in an embodiment of the present invention.
[0034] In such embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a first pre-defined level of humidity. In a preferred embodiment of the present invention, the first pre-defined level of humidity may be having a range of 20 to 30. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the first pre-defined level of humidity, then the comparison module 202 may be configured to generate a first condition execution signal. The comparison module 202 may be configured to transmit the generated first condition execution signal to the fan control module 204.
[0035] In another embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a second pre-defined level of humidity, when the sensed humidity obtained from the humidity sensors 112 may not lie within the range of the first pre-defined level of humidity. In a preferred embodiment of the present invention, the second pre-defined

level of humidity may be having a range of 15 to 20. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the second pre-defined level of humidity, then the comparison module 202 may be configured to generate a second condition execution signal. The comparison module 202 may be configured to transmit the generated second condition execution signal to the fan control module 204.
[0036] In yet another embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a third pre-defined level of humidity, when the sensed humidity obtained from the humidity sensors 112 may not lie within the range of the second pre-defined level of humidity. In a preferred embodiment of the present invention, the third pre-defined level of humidity may be having a range of 10 to 15. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the third pre-defined level of humidity, then the comparison module 202 may be configured to generate a third condition execution signal. The comparison module 202 may be configured to transmit the generated third condition execution signal to the fan control module 204.
[0037] In another embodiment of the present invention, the comparison module 202 may be configured to enable the data receiving module 200 to continue receiving the sensed humidity from the humidity sensors 112, when the sensed humidity obtained from the humidity sensors 112 may not lie within the range of the third pre-defined level of humidity.
[0038] In another embodiment of the present invention, the comparison module 202 may be configured to operate in a second mode, when the

sensed level of infrared radiations deviates from the first pre-defined level of infrared radiations as well as the second pre-defined level of infrared radiations. The second mode may represent a fully occupancy mode, in an embodiment of the present invention.
[0039] In such embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a fourth pre-defined level of humidity. In a preferred embodiment of the present invention, the fourth pre-defined level of humidity may be 50. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 is greater than the fourth pre-defined level of humidity, then the comparison module 202 may be configured to generate a fourth condition execution signal. The comparison module 202 may be configured to transmit the generated fourth condition execution signal to the fan control module 204.
[0040] In another embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a fifth pre-defined level of humidity, when the sensed humidity obtained from the humidity sensors 112 is less than or equal to the fourth pre-defined level of humidity. In a preferred embodiment of the present invention, the fifth pre-defined level of humidity may be having a range of 40 to 50. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the fifth pre-defined level of humidity, then the comparison module 202 may be configured to generate a fifth condition execution signal. The comparison module 202 may be configured to transmit the generated fifth condition execution signal to the fan control module 204.

[0041] In yet another embodiment of the present invention, the comparison module 202 may be configured to compare the sensed humidity obtained from the humidity sensors 112 with a sixth pre-defined level of humidity, when the sensed humidity obtained from the humidity sensors 112 may not lie within the range of the fifth pre-defined level of humidity. In a preferred embodiment of the present invention, the sixth pre-defined level of humidity may be having a range of 30 to 40. In an embodiment of the present invention, if the comparison module 202 determines that at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the sixth pre-defined level of humidity, then the comparison module 202 may be configured to generate a sixth condition execution signal. The comparison module 202 may be configured to transmit the generated sixth condition execution signal to the fan control module 204.
[0042] In another embodiment of the present invention, the comparison module 202 may be configured to enable the data receiving module 200 to continue receiving the sensed humidity from the humidity sensors 112, when the sensed humidity obtained from the humidity sensors 112 may not lie within the range of the sixth pre-defined level of humidity.
[0043] In yet another embodiment of the present invention, the comparison module 202 may be configured to generate a fan deactivation signal when the sensed level of infrared radiations is equal to the first pre-defined level of infrared radiations and the second pre-defined level of infrared radiations. The comparison module 202 may be configured to transmit the generated fan deactivation signal to the fan control module 204.
[0044] In an embodiment of the present invention, the comparison module 202 may be configured to compare the sensed temperature with a pre¬defined temperature. In a preferred embodiment of the present invention, the pre-defined temperature may be 16. In an embodiment of the present

invention, the comparison module 202 may be configured to generate a heat activation signal, when the sensed temperature exceeds the pre-defined temperature. The comparison module 202 may be configured to transmit the generated heat activation signal to the heat control module 206. In another embodiment of the present invention, the comparison module 202 may be configured to generate a heat deactivation signal, when the sensed temperature is less than or equal to the pre-defined temperature. The comparison module 202 may be configured to transmit the generated heat deactivation signal to the heat control module 206.
[0045] In an embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the first pre-defined level of humidity. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 at a medium speed to provide cool air based on the received first condition execution signal.
[0046] In another embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the second pre¬defined level of humidity. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 at the medium speed to provide the cool air based on the received second condition execution signal.
[0047] In yet another embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the third pre¬defined level of humidity. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 at a low speed to provide the cool air based on the

received third condition execution signal.
[0048] In another embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of all the fan coil units 104 installed at the corresponding large places. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of all the fan coil units 104 to provide the cool air based on the received fourth condition execution signal.
[0049] In yet another embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the fifth pre-defined level of humidity. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 at a full speed to provide the cool air based on the received fifth condition execution signal.
[0050] In yet another embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the sixth pre¬defined level of humidity. In such embodiment of the present invention, the fan control module 204 may be configured to activate the fans 116 of the fan coil units 104 at the full speed to provide the cool air based on the received sixth condition execution signal.
[0051] In another embodiment of the present invention, the fan control module 204 may be configured to deactivate the fans 116 of all the fan coil units 104 based on the received fan deactivation signal.
[0052] In an embodiment of the present invention, the heat control module 206 may be configured to activate the heating coils 118 of the corresponding fan coil units 104 to convert the electrical energy into the heat and transfer the heat through the corresponding fans 116 to the

surrounding area. The heat control module 206 may be configured to activate the heating coils 118 based on the received heat activation signal.
[0053] In another embodiment of the present invention, the heat control module 206 may be configured to deactivate the heating coils 118 of the corresponding fan coil units 104 to stop transferring the hot air to the surrounding area based on the received heat deactivation signal.
[0054] FIG. 3 depicts a flowchart of a method 300 for controlling the fans 116 based on the sensed humidity by using the system 100, according to an embodiment of the present invention.
[0055] At step 302, the system 100 may receive the sensed level of infrared radiations from the occupancy sensor 102.
[0056] At step 304, the system 100 may determine that the place is fully occupied based on the sensed level of infrared radiations.
[0057] At step 306, the system 100 may determine that the place is partially occupied based on the sensed level of infrared radiations.
[0058] At step 308, the system 100 may determine that the place is empty based on the sensed level of infrared radiations.
[0059] At step 310, the system 100 may compare the sensed humidity obtained from the humidity sensors 112 with the first pre-defined level of humidity. In a preferred embodiment of the present invention, the first pre-defined level of humidity may be having the range of 20 to 30. The method 300 may proceed to a step 316, when the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the first pre-defined level of humidity. Otherwise, the method 300 may proceed to a step 312.
[0060] At the step 312, the system 100 may compare the sensed humidity

obtained from the humidity sensors 112 with the second pre-defined level of humidity. In a preferred embodiment of the present invention, the second pre-defined level of humidity may be having a range of 15 to 20. The method 300 may proceed to a step 318, when the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the second pre-defined level of humidity. Otherwise, the method 300 may proceed to a step 314.
[0061] At the step 314, the system 100 may compare the sensed humidity obtained from the humidity sensors 112 with the third pre-defined level of humidity. In a preferred embodiment of the present invention, the third pre¬defined level of humidity may be having the range of 10 to 15. The method 300 may proceed to a step 320, when the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the third pre-defined level of humidity. Otherwise, the method 300 may continue comparing the sensed humidity with the first pre-defined level of humidity.
[0062] At the step 316, the system 100 may activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the first pre-defined level of humidity at the medium speed.
[0063] At the step 318, the system 100 may activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the second pre-defined level of humidity at the medium speed.
[0064] At the step 320, the system 100 may activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the third pre-defined level of humidity at the low speed.
[0065] At step 322, the system 100 may compare the sensed humidity obtained from the humidity sensors 112 with the fourth pre-defined level of humidity. In a preferred embodiment of the present invention, the fourth pre-defined level of humidity may be 50. The method 300 may proceed to

a step 328, when the at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 is greater than the fourth pre-defined level of humidity. Otherwise, the method 300 may proceed to a step 324.
[0066] At the step 324, the system 100 may compare the sensed humidity obtained from the humidity sensors 112 with the fifth pre-defined level of humidity. In a preferred embodiment of the present invention, the fifth pre-defined level of humidity may be having the range of 40 to 50. The method 300 may proceed to a step 330, when at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the fifth pre-defined level of humidity. Otherwise, the method 300 may proceed to a step 326.
[0067] At the step 326, the system 100 may compare the sensed humidity obtained from the humidity sensors 112 with the sixth pre-defined level of humidity. In a preferred embodiment of the present invention, the sixth pre¬defined level of humidity may be having the range of 30 to 40. The method 300 may proceed to a step 332, when at least one of, the sensed humidity obtained from the corresponding humidity sensors 112 lies within the range of the sixth pre-defined level of humidity. Otherwise, the method 300 may return to the step 322.
[0068] At the step 328, the system 100 may activate the fans 116 of all the fan coil units 104 at the full speed.
[0069] At the step 330, the system 100 may activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the fifth pre-defined level of humidity at the full speed.
[0070] At the step 332, the system 100 may activate the fans 116 of the fan coil units 104 having the sensed humidity lies within the range of the sixth pre-defined level of humidity at the medium speed.

[0071] At step 334, the system 100 may deactivate the fans 116 of all the fan coil units 104.
[0072] FIG. 4 depicts a flowchart of a method 400 for controlling the fans 116 based on the sensed temperature by using the system 100, according to an embodiment of the present invention.
[0073] At step 402, the system 100 may receive the sensed temperature from the temperature sensors 114.
[0074] At step 404, the system 100 may compare the sensed temperature with the pre-defined temperature. The method 400 may proceed to a step 406, when the sensed temperature is greater than the pre-defined temperature. Otherwise, the method 400 may proceed to a step 408, when the sensed temperature is less than or equal to the pre-defined temperature.
[0075] At the step 406, the system 100 may activate the fans 116 and the heating coils 118 of the corresponding fan coil units 104 to throw the hot air to the surrounding area.
[0076] At the step 408, the system 100 may deactivate the fans 116 and the heating coils 118 of the corresponding fan coil units 104 to stop transferring the hot air to the surrounding area.
[0077] Embodiments of the invention are described above with reference to block diagrams and schematic illustrations of methods and systems according to embodiments of the invention. While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

[0078] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope the invention is defined in the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements within substantial differences from the literal languages of the claims.

CLAIMS
I/We Claim:

1. A system (100) for controlling weather-based fans (116a-116n), the system (100) comprising:
an occupancy sensor (102) installed at various places in large spaces, wherein the occupancy sensor (102) is configured to sense a level of infrared radiations;
fan coil units (104a-104n) installed at the various places in the large spaces, wherein the fan coil units (104a-104n) comprise:
humidity sensors (112a-112n) configured to sense a humidity of a surrounding area in the large spaces; and
temperature sensors (114a-114n) configured to sense a temperature of the surrounding area in the large spaces; and
a control unit (106) configured to:
receive the sensed level of infrared radiations, the sensed humidity and the sensed temperature from the occupancy sensor (102), the humidity sensors (112a-112n) and the temperature sensors (1 Ha¬ll 4n) respectively;
compare the sensed level of infrared radiations with a first pre-defined level of infrared radiations and a second pre-defined level of infrared radiations;
compare the sensed humidity obtained from the humidity sensors (112a-112n) with a first pre-defined level of humidity, a second pre-defined level of humidity and a third pre-defined level of humidity, when the sensed level of infrared radiations deviates from the first

pre-defined level of infrared radiations, and equal to the second pre-defined level of infrared radiations;
activate the fans (116a-116n) of the fan coil units (104a-104n) having the sensed humidity lies within a range of the first pre-defined level of humidity at a medium speed;
activate the fans (116a-116n) of the fan coil units (104a-104n) having the sensed humidity lies within a range of the second pre-defined level of humidity at the medium speed;
activate the fans (116a-116n) of the fan coil units (104a-104n) having the sensed humidity lies within a range of the third pre-defined level of humidity at a low speed;
compare the sensed humidity obtained from the humidity sensors (112a-112n) with a fourth pre-defined level of humidity, a fifth pre-defined level of humidity and a sixth pre-defined level of humidity, when the sensed level of infrared radiations deviates from the first pre-defined level of infrared radiations and the second pre-defined level of infrared radiations;
activate the fans (116a-116n) of all the fan coil units (104a-104n) at a full speed, when the sensed humidity is greater than the fourth pre¬defined level of humidity;
activate the fans (116a-116n) of the fan coil units (104a-104n) having the sensed humidity lies within a range of the fifth pre-defined level of humidity at the full speed; and
activate the fans (116a-116n) of the fan coil units (104a-104n) having the sensed humidity lies within a range of the sixth pre-defined level of humidity at the medium speed.

2. The system (100) as claimed in claim 1, wherein the first pre-defined level of humidity is having the range of 20 to 30.
3. The system (100) as claimed in claim 1, wherein the second pre¬defined level of humidity is having the range of 15 to 20.
4. The system (100) as claimed in claim 1, wherein the third pre-defined level of humidity is having the range of 10 to 15.
5. The system (100) as claimed in claim 1, wherein the fourth pre-defined level of humidity is 50.
6. The system (100) as claimed in claim 1, wherein the fifth pre-defined level of humidity is having the range of 40 to 50.
7. The system (100) as claimed in claim 1, wherein the sixth pre-defined level of humidity is having the range of 30 to 40.
8. The system (100) as claimed in claim 1, wherein the control unit (106) is configured to deactivate the fans (116a-116n) of the fan coil units (104a-104n) when the sensed level of infrared radiations is equal to the first pre-defined level of infrared radiations and the second pre-defined level of infrared radiations.
9. The system (100) as claimed in claim 1, wherein the control unit (106) is configured to compare the sensed temperature with a pre-defined temperature.
10.The system (100) as claimed in claim 9, wherein the control unit (106) is configured to activate the fans (116a-116n) and heating coils (118a-118n) of the corresponding fan coil units (104a-104n) to throw hot air to the surrounding area, when the sensed temperature exceeds the pre¬defined temperature.