FORM 2
The Patents Act,1970
(39 of 1970) Complete Specification ( see Section 10 ) Girish Vinayak Vaze 103 Jai Gopal Industrial Estate 3 Parulekar Marg, Mumbai- 400,028 Maharashtra, India
5 OCT 2001
The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed :


This invention relates to " fan regulator system. "
Definitions:
For brevity sake the expression 'Fan regulator system' wherever used throughout this specification means and in¬cludes a regulator for controlling exact fan motor speed forming user friendly means for maintaining environmental balance and effecting saving of upto 40% electrical energy without generating any heat compared to prior art resistor type art fan regulators.
More particularly this invention relates to electronic fan regulator system which includes a rotary switch along with fixed value resistors and a capacitor are used only in switching circuit and NOT as load current carrying compon¬ents used in prior art fan regulators and the thyrister connected in power control device controls the full wave phase thereby giving necessary current out put to drive fan motor thereby confirms the position of exact fan motor speed and eliminates the problems usually caused due to humming noise of fan motor and generating heat otherwise caused by sparking of switch contacts and consequent burnouts and at the same time also saves upto 40% of electrical power other¬wise consumed by prior art capacitor type fan regulator. This is an ideal fan regulator for use in energy starved countries such as India and other countries of the World
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with ever increasing energy tariff where a watt of energy saved is a watt generated for use in other agricultural and other industries.
PRIOR ART
In prior art there are three types of fan motor regula¬tors which are known in bazaar language as 'fan regulators' namely:
1. ' Electrical resistor type ' fan motor regulator using a rotary switch and a wire wound resistors of differ¬ent ratings connected to each pole of switch connected in series combination with fan motor. The drawback in this type of regulator resides in the high energy consumption upto 40 watts electrical energy depending on the value of selected resistor in addition to the upto 60 watts electri¬cal energy consumed for driving the fan motor rotor. In this type of fan regulator large casing with proper venti¬lating windows require to be provided to dissipate the heat generated by the regulator components. Besides this the efficiency of the regulator decreases as resistance gets burnt due to sparking and requires frequent cleaning and servicing of the fan regulator.
2. 'Slip type' electronic fan regulator using a potentiometer and an electronic circuit consisting of a thyrister used in phase control by changing firing voltage determined by the position of the potentiometer. This
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firing voltage determines the RPM of fan motor. The drawback in this type of regulator is 'wear and tear' in the poten¬tiometer tracks thus leading to an unreliable product and thus the user is unable to determine the exact RPM of fan motor. The other limitations are humming sound of the fan motor and variation in fan motor speeds. When this happens the fan speed cannot be controlled and resultant variations increases the load on electrical wattage used to drive the fan motor.
3. 'Electrical Step Type' fan regulator in which the switch uses a combination of a rotary switch and capacitors of different values which due to differences in the capaci¬tor values the fan speed is regulated. However, during each step of the rotary switch when a new capacitor or bank of capacitors come into action a capacitance discharge through the moving and pole contacts of the switch causes a sparking on the contact areas which shortens the service life of switch and thus of the fan regulator.
The principal object of this invention is to offer electronic fan regulator system which includes a fan regula¬tor of the type hereinafter described in which the drawbacks ever present in prior art fan regulators are sought to be completely eliminated thereby ensuring a saving of upto 40 watts electricity otherwise consumed by prior art electrical resistor type fan regulator thus giving a reliable, compact,
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step type, noise free hum free regulator with a lone service life at affordable cost.
Statement of invention
According to this invention the fan regulator system for regulating / controlling exact fan motor speed comprises a regulator having a combination of filter block, a thyr-ister controlled switching circuit, a resistor array having plurality of different fixed values connected through a capacitor to a stepper type rotary switch having 'ON/OFF' switch being used only in switching circuit wherein one pole of said A/C electric supply source being connected to corre¬sponding fan motor pole and the other pole being connected to corresponding other fan motor pole only through said switching circuit and NOT as power load carrying components thereby supplying electrical energy to said fan motor with¬out generating any heat between switch contact points.
In the accompanying drawings:
Fig. 1 - shows a schematic block and flow
diagram of the electronic fan regulator.
The invention will now be described with reference to accompanying block and flow diagram of electronic fan regu¬lator system shown in Fig. 1 comprises a combination of a filter block 'A', a power control block 'B' carrying a thyrister controlled switching circuit for controlling the full wave phase and gives necessary current output to the
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fan motor, a resistor array 'C having plurality of differ¬ent fixed values and a capacitor and a selector rotary switch 'D' such that said combination of rotary switch along with said fixed value resistors and capacitor used in switching circuit only and not as load carrying component thereby giving to the user a confirmed position of fan speed and effecting considerable saving in electrical energy used for driving the fan motor.
The electrical system flow diagram as shown in Fig. 1 the one pole of electric power supply is connected to corre¬sponding pole of fan motor 'M' and the other pole of elec¬tric power supply passing through a filter 'A', thyrister controlled switch in box 'B', resistor array and capacitor in block 'C' , and selector rotary switch in box 'D' having steps and 'OFF' switch connected to the other pole of fan motor 'M' substantially as shown by arrows such that on switching 'ON' the fan motor 'M' the fan rotates at fixed RPM controlled by said resistor array and capacitor in block 'C and the RPM of fan is controlled by said selector rotary switch in block 'D' thereby giving to the user a visual indication of exact fan motor speed.
The advantage offered by the use of this fan regulator forming the electronic fan regulator system resides in the supply of electric current to the fan motor does not get heated and also does not cause any 'wear and tear' of the
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switch contacts and which ensure life long service for the fan regulator. According to this invention the values of the components used in the electronic fan regulator may change according to the capacity of the fan regulator.
While I have described and illustrated a particu¬lar embodiment of my present invented fan motor regulator for use in the electronic fan regulator system I do not wish to limit myself to the exact form shown in the flow of electric energy through box diagram of fig. 1 is intended to illustrate the typical method of making and carrying out the regulator and is susceptible of such changes and modifica¬tions which may be made by any person skilled in the art and any such changes or modifications so made therein to suit individual job requirements shall define no material depar¬ture from the salient features of the electronic fan regula¬tor herein described and illustrated in the accompanying drawing.
I CLAIM:
1. Fan regulator system for regulating / controlling exact fan motor speed characterised in that it comprises a regulator having a combination of filter block, a thyrister controlled switching circuit, a resistor array having plu¬rality of different fixed values connected through a capaci¬tor to a stepper type rotary switch having 'ON/OFF' switch being used only in switching circuit wherein one pole of
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said A/C electric supply source being connected to corre¬sponding fan motor pole and the other pole being connected to corresponding other fan motor pole only through said switching circuit and NOT as power load carrying components. 2 Fan regulator system as claimed in Claim 1 wherein a is provided in the regulator.
3. Fan regulator system as claimed in Claims 1 and 2
wherein thyrister controlled switch is introduced between
said filter and said resistor array.
4. Fan regulator system as claimed in Claims 1 to 3 wherein said resistor array through a capacitor is intro¬duced in the regulator circuit between said thyrister con¬trolled switching circuit and rotary switch.
5. Fan regulator system as claimed in Claims 1 to 4 wherein a rotary selector stepper switch having an 'ON/OFF' switch being introduced between said resistor array and fan motor.
6. Fan regulator system having a regulator substantially
as herein described and illustrated in the accompanying
block drawing.
Dated this 5th October 2001
R.S. Amladi of Purshottamdas Gokuldas Attorney for the applicant
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