DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
AUTOMATIC SWITCHOVER SYSTEM FROM AIR CONDITIONER TO FAN AND METHOD OF ITS OPERATION

Applicant:
Mazagon Dock Shipbuilders Limited
A company Incorporated in India under the Companies Act, 1956
Under Ministry of Defence,
(A Govt. of India Undertaking)
Having address:
Dockyard Road, Mazagon,
Mumbai - 400010, Maharashtra, India

The following specification particularly describes the invention and the manner in which is to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present application claims priority from Indian provisional application no. 201921020712 filed on 24th May 2019.
TECHNICAL FIELD
[002] The present disclosure in general relates to an automatic switching over system from an air conditioning (AC) unit to a fan unit and more specifically, to a method for automatically switching ON the fan unit when the AC unit gets switched OFF.
BACKGROUND
[003] Generally, running an air conditioning (AC) unit throughout a night is a costly affair. In Indian society, a middle-class family still focuses on reducing their expenses. Whereas, another important factor is comfort. During nighttime, an atmospheric temperature is low and after certain time, we may not require the AC as it overcools a room and cause a discomfort. In such condition, one need to switch off the AC and switch on a fan. Some people set the AC on timer mode so that the AC unit gets automatically switched off after predefined time but in this case also, one need to switch on the fan manually when the AC becomes switched off. This causes interruption in the sleep. Also, it raises an electricity bill expenses. Hence, there is a need of a method that automatically turn ON the fan unit when the AC unit gets turn OFF.
[004] The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art already known to a person skilled in the art.
SUMMARY
[005] Before the present system and method are described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to an automatic switchover from air conditioner unit to fan unit, and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[006] The present subject matter discloses an automatic switching over from an air conditioner (AC) to a fan. The automatic switchover phenomenon may be achieved with a help of a relay circuit that integrates an AC circuit and a fan circuit. Further, the relay circuit comprises a relay coil and the relay coil may be configured to make a common contact with an AC indoor unit and an outdoor unit of the AC so that the current to the relay coil is supplied either from the AC indoor unit or the outdoor unit. The fan circuit may be configured to be connected to the relay circuit a normally open (NO) and a normally closed (NC) contacts. Further, the relay coil may be configured to get de-energized when the AC unit is OFF, and the relay circuit may configured to be in a normally closed (NC) position resulting in automatic switching ON of the fan unit and vice versa. Further, the fan unit comprises an ON/OFF switch and may be configured to kept in ON position in order to allow the automatic switching of AC unit to the fan unit when the AC unit is OFF.
[007] The objective of the present invention is to provide an automatic switching over of an AC to a fan in case when the AC is configured to be switched OFF.
BRIEF DESCRIPTION OF DRAWINGS
[008] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present subject matter, an example of construction of the present subject matter is provided as figures; however, the present subject matter is not limited to a specific system or a device disclosed in the document and the figures.
[009] The present subject matter is described in detail with reference to the accompanying figures. The same numbers are used throughout the drawings to refer various features of the present subject matter.
[0010] Figure 1 illustrates an automatic switchover circuit from an air conditioner to a fan, in accordance with an embodiment of the present subject matter.
[0011] Figure 2 illustrates a flowchart of a method of operation of the automatic switchover from the air conditioner to a fan, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[0012] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any devices similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary devices are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0013] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments described but is to be accorded the widest scope consist in this regard, in a generic sense.
[0014] An automatic switching over of an air conditioner to a fan unit may comprise the integration of an AC circuit and a fan circuit. The integration of two circuits may be achieved by providing a relay circuit between the two aforesaid circuits. The relay circuit mainly works based on an energization/de-energization of a relay coil. Further, the relay coil may control the fan circuit to be in closed/open circuit form. Accordingly, the fan unit may get switched ON/OFF.
[0015] In an embodiment, the automatic switching over phenomenon is basically configured to be work when the fan unit switch may be in ON condition. So, the fan circuit may configured to be controlled by the relay circuit.
[0016] Referring to figure 1, an air conditioning (AC) unit circuit along with a relay circuit (106) and a fan circuit (108) is illustrated. The AC unit circuit further comprises an AC indoor unit (114) and an outdoor unit (116). In the present disclosure, the AC circuit may be integrated with the fan circuit (108) with the help of relay circuit (110). The relay circuit (110) comprises a relay coil (112) in connection with an AC indoor unit (114) and an outdoor unit (116) wherein the relay coil (112) further comprises a normally open (NO) (118) and a normally closed (NC) (120) position. The fan circuit (108) may be configured to be integrated to the relay circuit (106) by NO/NC (118/120) position. Further, the fan circuit (108) comprises an ON/OFF (124/126) switch (122). In an embodiment, in order to make an automatic switchover from the AC to fan (108), the switch (122) may configured to be kept always in ON (124) position. Furthermore, the relay coil (112) may be configured to be of rating 5 ampere and 230 volts alternating current. A current to the relay coil (112) may configured to be supplied either from a printed circuit board (PCB) of the AC indoor unit (114) or the outdoor unit (116). In an embodiment, when the AC unit is ON, the relay coil (112) may energize and may makes contact with NO (118) point of the fan circuit (108). Thereby, no current flows through the fan circuit (108). Similarly, when the AC unit is OFF, the relay coil (112) gets de-energized and makes contact with the NC (120) point of the fan circuit (108), thereby closing the fan circuit (108) and the current flows through the fan circuit (108).
[0017] Referring now to figure 2, a flowchart and a method of operation for an automatic switchover from AC to fan is illustrated. In an embodiment, when the AC unit is ON, the relay coil (112) of the relay circuit (110) may get energized resulting in the fan OFF (126) condition. Due to the relay coil (112) energization, the NO (118) connection is established with the fan circuit (108). Hence, current may not flow through the fan circuit (108) as the circuit (108) is open. In one embodiment, after a preset timer is activated, the AC may get automatically switched OFF after preset time. Further, the relay coil (112) may get de-energized as the AC is OFF and NC (120) connection is established with the fan circuit (108). Hence, the circuit switches ON the fan unit (104). So, when the AC unit is OFF, the fan unit (104) gets automatically turn ON without any manual intervention. In an embodiment, the automatic switchover circuit is more preferably useful in an inverter type AC wherein the compressor may not cut off and the compressor runs on a variable speed depending upon a heat load.
[0018] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include the following:
[0019] The proposed subject matter prevents running of an air conditioning unit throughout night.
[0020] The proposed subject matter enables an automatic switching ON of a fan unit.
[0021] The proposed subject matter enables saving of an electricity expense.
[0022] The proposed subject matter may be used in every household.
[0023] The proposed subject matter enables an automatic switching over from an air conditioning unit to a fan without manual intervention.
[0024] The proposed subject matter may need modification in an existing AC circuit and fan circuit to enable automatic switching over phenomenon.

,CLAIMS:
1. An automatic switchover system from an air conditioning (AC) unit to a fan unit (104) comprising:
at least one fan with fan circuit (108) along with switch (122);
at least one AC along with AC circuit (106);
a relay circuit (110) with a relay coil (112) to integrate an AC circuit (106) and a fan circuit (108) for automatic switching over between either of the AC unit or Fan unit (104) for its operation.

2. The automatic switchover system from an air conditioning (AC) unit to a fan unit (104) as claimed in claim 1, wherein the relay coil (112) is configured to be de-energized when the AC unit is OFF and the relay circuit (110) is configured to be in a normally closed (NC) (120) position resulting in automatic switching ON of the fan unit (104) and vice versa.

3. The automatic switchover system from an air conditioning (AC) unit to a fan unit (104) as claimed in claim 1, wherein the current to the relay coil (112) is configured to be supplied from the AC indoor unit (114) or the outdoor unit (116).

4. The automatic switchover system from an air conditioning (AC) unit to a fan unit (104) as claimed in claim 1, wherein the fan unit (104) is configured with an ON/OFF (124/126) switch (122).

5. The automatic switchover system from an air conditioning (AC) unit to a fan unit (104) as claimed in claim 1, wherein the fan switch (122) is configured to be kept in ON (124) position in order to allow the automatic switching of AC unit to the fan unit (104) when the AC unit is OFF.
6. A method for automatic switchover from an air conditioning (AC) unit to a fan unit (104) comprising:
starting the fan with fan circuit switch (122);
switching on the air conditioner (AC) which will energise the relay coil (112) of the relay to open the NC circuit of fan to NO stage thereby switching off the fan circuit (108) by automatic switching over from fan (104) to AC;
switching off the air conditioner (AC) which will de-energise the relay coil (112) of the relay to close the NC circuit of fan to NC stage thereby switching on the fan circuit (108) by automatic switching over from AC to fan (104).