DESC:FIELD OF THE INVENTION
The present invention generally relates to a system for an air-conditioner cross-flow fan and particularly to the design of the blade profile of a cross-flow fan for maximum airflow and noise reduction.
BACKGROUND
Global warming causes an increase in the temperature of the earth. Therefore, summer is getting hotter, and winters are getting less cold. Because of the hotter summer, the demand for air conditioners has increased. Producing and using electricity more efficiently reduces both the amount of fuel needed to generate electricity and the amount of greenhouse gases and other air pollution emitted as a result. Air-conditioners consume a large amount of electricity, which will directly impact on the environment & electricity bills are also very high. To tackle this situation, we require more energy-efficient products. Thus, there is a need for the present invention to solve the problem of more energy-efficient products. The current air conditioner usually focuses on reducing the power consumption and noise of compressors to make Air-conditioners energy-efficient. However, there is a limited possibility of change in the technology of the compressor to reduce power consumption. Also, the current air conditioner changes the design of condenser power reduction and noise reduction. Noise is also created due to the evaporator blower fan. There is very little innovation in the design of the evaporator blower fan and cross-flow fan.
US9771947B2 discloses a cross-flow fan includes a plurality of fan blades provided to be circumferentially spaced apart from each other. The fan blade has an inner edge portion arranged on the radially inner side to/from which air flows in/out, and an outer edge portion arranged on the radially outer side to/from which air flows in/out. Fan blade has a blade surface extending between the inner edge portion and the outer edge portion. The blade surface includes a pressure surface arranged on the rotation direction side of the cross-flow fan and a suction surface arranged on the back side of the pressure surface. When cut along a plane orthogonal to the rotation axis of the cross-flow fan, the fan blade has a blade cross-sectional shape in which a concave portion concave from the pressure surface is formed.
The existing invention does not provide maximum airflow. The operating noise of the existing invention is high. Therefore, there is a need for an improved design of cross-flow fans.

OBJECTIVE OF THE INVENTION
The main objective of the present invention is to design & develop a cross-flow fan of the air conditioner evaporator that provides comfort to a human being with maximum airflow.
Another objective of the present invention is to design & develop a cross-flow fan of the air conditioner evaporator that provides comfort to human beings with less operating noise of Air conditioner.
Yet another objective of the present invention is to design & develop a cross-flow fan of the air conditioner evaporator that provides comfort to human beings with more energy-efficient products.
Yet another objective of the present invention is to provide more cooling with less consumption of electricity.
Yet another objective of the present invention is to provide a system that cuts down the cost of operation of cooling by reducing energy consumption.
Further objectives, advantages, and features of the present invention will become apparent from the detailed description provided herein below, in which various embodiments of the disclosed invention are illustrated by way of example.
SUMMARY OF THE INVENTION
The present invention relates to a cross-flow fan (CFF) system for maximum airflow and noise reduction. The present invention includes a crossflow fan and a chassis scroll. The crossflow fan includes a center of axis, and a fan rotor. The fan rotor rotates about the center of the axis. The fan rotor includes a plurality of blades. The plurality of blades includes a blade chord line. The chord length of the blade chord line and radius of the blade chord line of the plurality of blades represents the blade profile. Herein, the blade profile consists of various factors, the horizontal length of the plurality of blades, the thickness of the plurality of blades, the angle between the plurality of blades inlet angle of the plurality of blades, the exit angle of the plurality of blades, the chord length of the blade chord line and radius of the blade chord line. Each factor affects the blade profile that determines the airflow performance like static pressure generated, and airflow velocity for a given power input. Thus, by optimizing the blade profile the air flow rate is increased helps in increasing the efficiency of the air conditioner. In the preferred embodiment, to optimize the blade profile for high airflow, the horizontal length of the plurality of blades is kept between 65 to 70 mm to maintain the structural rigidity as well as to maintain the reliability of the fan rotor. In the preferred embodiment, to optimize the blade profile for high airflow, the maximum thickness of the plurality of blades on the center is 1.1 mm and on the tip of the plurality of blades, the thickness is 0.65-0.7mm. In the preferred embodiment, the angle between the plurality of blades is represented by s, to optimize the blade profile for high airflow, the plurality of blades are equally spaced hence the angle between the plurality of blades s is 10.3°(10.3 Degree). In the preferred embodiment, Ø represents the exit angle of the plurality of blades that affects the exit velocity of the blade and hence airflow speed, thus the exit angle of the plurality of blades is 71.2°(71.2 Degree). In the preferred embodiment, to optimize the blade profile for high airflow, the chord length of the blade chord line is 14.8 mm, and the radius of the blade chord line is 12.2 mm. Characterized in that, the plurality of blades are fixed on the periphery of the circumference of the fan rotor along the center of axis in a slanted manner thus the plurality of blades are not parallel to the center of axis of the fan rotor. Thus, creating a skew angle(?) between the center of axis and the plurality of blades. Characterized in that, the crossflow fan has a modular design, so one module delivers the air which the next module sucks. Between the modules, there is a variation in the airflow pattern, and hence the airflow is not continuous. So skew angle(?) is provided to the plurality of blades to get continuously varying the fan rotor pattern instead of interrupted airflow, this helps in generating a uniform airflow through the crossflow fan. Since the airflow becomes uniform and does not cause turbulence, the airflow noise is also reduced. Characterized in that, the blade profile along with the skew angle(?) is optimized to get high airflow in the system less power consumption, and low noise. The chassis scroll is a housing for the fan rotor. The chassis scroll includes a suction port, and a blowout port. The suction port is used for sucking air with the help of the crossflow fan. The blowout port is used for blowing the air out and housing the fan rotor.
The main advantage of the present invention is that the present invention provides comfort to a human being with maximum airflow.
Another advantage of the present invention is that the present provides comfort to a human being with less operating noise air conditioner.
Yet another advantage of the present invention is that the present invention provides comfort to human beings with more energy-efficient products.
Yet another advantage of the present invention is that the present invention provides more cooling with less consumption of electricity.
Yet another advantage of the present invention is that the present invention cuts down the cost of operation of cooling by reducing energy consumption.
Further objectives, advantages, and features of the present invention will become apparent from the detailed description provided herein below, in which various embodiments of the disclosed invention are illustrated by way of example.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings are incorporated in and constitute a part of this specification to provide a further understanding of the invention. The drawings illustrate one embodiment of the invention and together with the description, serve to explain the principles of the invention.
Fig.1. illustrates the cross-sectional view of air-conditioner scroll design system.
Fig.2. illustrates an exploded front view of air-conditioner scroll design system.
Fig.3. illustrates the isometric view of chassis scroll.
DETAILED DESCRIPTION OF THE INVENTION
Definition
The terms “a” or “an”, as used herein, are defined as one or as more than one. The term “plurality”, as used herein, is defined as two as or more than two. The term “another”, as used herein, is defined as at least a second or more. The terms “including” and/or “having”, as used herein, are defined as comprising (i.e., open language). The term “coupled”, as used herein, is defined as connected, although not necessarily directly, and not necessarily mechanically.
The term “comprising” is not intended to limit inventions to only claiming the present invention with such comprising language. Any invention using the term comprising could be separated into one or more claims using “consisting” or “consisting of” claim language and is so intended. The term “comprising” is used interchangeably used by the terms “having” or “containing”.
Reference throughout this document to “one embodiment”, “certain embodiments”, “an embodiment”, “another embodiment”, and “yet another embodiment” or similar terms means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of such phrases or in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics are combined in any suitable manner in one or more embodiments without limitation.
The term “or” as used herein is to be interpreted as an inclusive or meaning any one or any combination. Therefore, “A, B or C” means any of the following: “A; B; C; A and B; A and C; B and C; A, B and C”. An exception to this definition will occur only when a combination of elements, functions, steps, or acts are in some way inherently mutually exclusive.
As used herein, the term "one or more" generally refers to, but not limited to, singular as well as the plural form of the term.
The drawings featured in the figures are to illustrate certain convenient embodiments of the present invention and are not to be considered as a limitation to that. Term "means" preceding a present participle of operation indicates the desired function for which there are one or more embodiments, i.e., one or more methods, devices, or apparatuses for achieving the desired function and that one skilled in the art could select from these or their equivalent in view of the disclosure herein and use of the term "means" is not intended to be limiting.
disclosure herein and use of the term "means" is not intended to be limiting.
Fig.1 illustrates a crossflow fan(114). The crossflow fan(114) includes a center of axis(106), and a fan rotor(102). The fan rotor(102) rotates about the center of the axis(106). The fan rotor(102) includes a plurality of blades(104) and disc-shaped partition plates(118), the plurality of blades(104). The disc-shaped partition plates(118), are spaced apart from one another, plurality of blades(104) are provided on outer peripheral portions of each pair of the disc-shaped partition plates(118) facing each other to extend between the pair of the partition plates. The plurality of blades(104) are circumferentially spaced apart from one another.
Fig.2 illustrates a crossflow fan(114) skew angle(?). The fan rotor(102) includes a plurality of blades(104). The plurality of blades(104) are fixed on the periphery of the circumference of the fan rotor(102) along the center of axis(106) in a slanted manner thus the plurality of blades(104) are not parallel to the center of axis(106) of the fan rotor(102). Thus creating a skew angle(?) between the center of axis(106) and the plurality of blades(104).
Fig.3 illustrates a plurality of blades(104) blad profile. The plurality of blades(104) includes a blade chord line(116). The chord length of the blade chord line(116) and radius of the blade chord line(116) of the plurality of blades(104) represents the blade profile.
Fig.4 illustrates the angles in a plurality of blades(104). In the preferred embodiment, the angle between the plurality of blades(104) is represented by s. In the preferred embodiment, Ø represents the exit angle of the plurality of blades(104) that affects the exit velocity of the blade and hence airflow speed.
Fig.5 illustrates the section view of a crossflow fan(114) in the AC indoor unit. The chassis scroll(108) is a housing for the fan rotor(102). The chassis scroll(108) includes a suction port(110), a blowout port(112). The suction port(110) is used for sucking air with help of the crossflow fan(114). The blowout port(112) is used for blowing the air out, and housing the fan rotor(102). The fan rotor(102) includes the plurality of blades(104). The plurality of blades(104) are circumferentially spaced apart from one another.
The present invention relates to a cross-flow fan (CFF) system for maximum airflow and noise reduction. The present invention includes a crossflow fan and a chassis scroll. The crossflow fan includes a center of axis, and a fan rotor. The fan rotor rotates about the center of the axis. The fan rotor includes a plurality of blades. The plurality of blades includes a blade chord line. The chord length of the blade chord line and radius of the blade chord line of the plurality of blades represents the blade profile. Herein, the blade profile consists of various factors, the horizontal length of the plurality of blades, the thickness of the plurality of blades, the angle between the plurality of blades inlet angle of the plurality of blades, the exit angle of the plurality of blades, the chord length of the blade chord line and radius of the blade chord line. Each factor affects the blade profile that determines the airflow performance like static pressure generated, and airflow velocity for a given power input. Thus by optimizing the blade profile the air flow rate is increased helps in increasing the efficiency of the air conditioner. In the preferred embodiment, to optimize the blade profile for high airflow, the horizontal length of the plurality of blades is kept between 65 to 70 mm to maintain the structural rigidity as well as to maintain the reliability of the fan rotor. In the preferred embodiment, to optimize the blade profile for high airflow, the maximum thickness of the plurality of blades on the center is 1.1 mm and on the tip of the plurality of blades, the thickness is 0.65-0.7mm. In the preferred embodiment, the angle between the plurality of blades is represented by s, to optimize the blade profile for high airflow, the plurality of blades are equally spaced hence the angle between the plurality of blades s is 10.3°(10.3 Degree). In the preferred embodiment, Ø represents the exit angle of the plurality of blades that affects the exit velocity of the blade and hence airflow speed, thus the exit angle of the plurality of blades is 71.2°(71.2 Degree). In the preferred embodiment, to optimize the blade profile for high airflow, the chord length of the blade chord line is 14.8 mm, and the radius of the blade chord line is 12.2 mm. Characterized in that, the plurality of blades are fixed on the periphery of the circumference of the fan rotor along the center of axis in a slanted manner thus the plurality of blades are not parallel to the center of axis of the fan rotor. Thus creating a skew angle(?) between the center of axis and the plurality of blades. Characterized in that, the crossflow fan has a modular design, so one module delivers the air which the next module sucks. Between the modules, there is a variation in the airflow pattern, and hence the airflow is not continuous. So skew angle(?) is provided to the plurality of blades to get continuously varying the fan rotor pattern instead of interrupted airflow, this helps in generating a uniform airflow through the crossflow fan. Since the airflow becomes uniform and does not cause turbulence, the airflow noise is also reduced. Characterized in that, the blade profile along with the skew angle(?) is optimized to get high airflow in the system less power consumption, and low noise. The chassis scroll is a housing for the fan rotor. The chassis scroll includes a suction port, a blowout port. The suction port is used for sucking air with help of the crossflow fan. The blowout port is used for blowing the air out, and housing the fan rotor.
In an embodiment, the fan rotor includes disc-shaped partition plates, the plurality of blades, and the disc-shaped partition plates, are spaced apart from one another, plurality of blades are provided on outer peripheral portions of each pair of the disc-shaped partition plates facing each other to extend between the pair of the partition plates, the plurality of blades are circumferentially spaced apart from one another.
In an embodiment, the present invention relates to a method for an Air-conditioner scroll design system, the method comprising:
an airflow directed from the suction port to the blowout port when the fan rotor rotates;
this causes the air in the indoor space to flow into the chassis scroll through the suction area;
the heat is exchanged with the refrigerant when passing through the heat exchanger and air temperature changes accordingly;
after temperature change, air is sucked through the rotor fan, flows through an air flow path formed in the chassis scroll, and is blown out of the blowout port;
the air blown out of the rotor fan is supplied into the indoor space through the blowout port, this air adjusts the temperature of the air in the indoor space.
Characterized in that, the plurality of blades are fixed on the periphery of the circumference of the fan rotor along the center of axis in a slanted manner thus the plurality of blades are not parallel to the center of axis of the fan rotor. Thus creating a skew angle(?) between the center of axis and the plurality of blades. Characterized in that, the crossflow fan has a modular design, so one module delivers the air which the next module sucks. Between the modules, there is a variation in the airflow pattern, and hence the airflow is not continuous. So skew angle(?) is provided to the plurality of blades to get continuously varying the fan rotor pattern instead of interrupted airflow, this helps in generating a uniform airflow through the crossflow fan. Since the airflow becomes uniform and does not cause turbulence, the airflow noise is also reduced. Characterized in that, the blade profile along with the skew angle(?) is optimized to get high airflow in the system less power consumption, and low noise.
Further objectives, advantages, and features of the present invention will become apparent from the detailed description provided hereinbelow, in which various embodiments of the disclosed present invention are illustrated by way of example and appropriate reference to accompanying drawings. Those skilled in the art to which the present invention pertains may make modifications resulting in other embodiments employing principles of the present invention without departing from its spirit or characteristics, particularly upon considering the foregoing teachings. Accordingly, the described embodiments are to be considered in all respects only as illustrative, and not restrictive, and the scope of the present invention is, therefore, indicated by the appended claims rather than by the foregoing description or drawings. Consequently, while the present invention has been described with reference to particular embodiments, modifications of structure, sequence, materials and the like apparent to those skilled in the art still fall within the scope of the invention as claimed by the applicant. ,CLAIMS:1. An a Cross Flow Fan (CFF) system(100) for maximum airflow and noise reduction, the system(100) comprising:
A crossflow fan(114), the crossflow fan(114) having
a center of axis(106)
a fan rotor(102), the fan rotor(102) rotates about a centre of axis(106), the fan rotor(102) having
a plurality of blades(104), the plurality of blades(104) having
a blade chord line(116), the chord length of the blade chord line(116) and radius of the blade chord line(116)of the plurality of blades(104) represents the blade profile;
wherein, the blade profile consists of various factors, the horizontal length of the plurality of blades(104), the thickness of the plurality of blades(104), the angle between the plurality of blades(104) inlet angle of the plurality of blades(104), the exit angle of the plurality of blades(104), the chord length of the blade chord line(116) and radius of the blade chord line(116), and each factor affects the blade profile that determines the airflow performance like static pressure generated, air flow velocity for a given power input, thus by optimizing the blade profile the air flow rate is increased that helps in increasing efficiency of air conditioner,
characterized in that, the plurality of blades(104) are fixed on the periphery of the circumference of the fan rotor(102) along the center of axis(106) in a slanted manner that is the plurality of blades(104) are not parallel to the center of axis(106) of the fan rotor(102) thus creating a skew angle(?) between the center of axis(106) and the plurality of blades(104),
characterized in that, the crossflow fan(114) has a modular design, so one module delivers the air which the next module sucks, between the module, there is a variation in the airflow pattern, and hence the airflow is not continuous, so skew angle(?) is provided to the plurality of blades(104) to get continuous varying the fan rotor(102) pattern instead of interrupted airflow, this helps in generating a uniform airflow through the crossflow fan(114), since the air flow becomes uniform and does not cause turbulence, the airflow noise is also reduced,
characterized in that, the blade profile along with the skew angle(?) is optimized to get high airflow in the system less power consumption, and low noise,
a chassis scroll(108), the chassis scroll(108) is a housing for the fan rotor(102), the chassis scroll(108) having
a suction port(110), the suction port(110) is used for sucking air with help of the crossflow fan(114);
a blowout port(112), the blowout port(112) is used for blowing the air out, and housing the fan rotor(102).
2. The system(100), as claimed in claim 1, wherein the fan rotor(102) includes disc-shaped partition plates(118), plurality of blades(104), and, the disc-shaped partition plates(118), are spaced apart from one another, plurality of blades(104) are provided on outer peripheral portions of each pair of the disc-shaped partition plates(118) facing each other to extend between the pair of the partition plates, the plurality of blades(104) are circumferentially spaced apart from one another.
3. The system(100) as claimed in claim 1, wherein, to optimize the blade profile for high airflow, the horizontal length of the plurality of blades(104) is kept between 65 to 70 mm to maintain the structural rigidity as well as to maintain the reliability of the fan rotor(102).
4. The system(100) as claimed in claim 1, wherein, to optimize the blade profile for high air flow, the maximum thickness of the plurality of blades(104) on the centre is 1.1 mm and on the tip of the plurality of blades(104), the thickness is 0.65-0.7mm.
5. The system(100) as claimed in claim 1, wherein, the angle between the plurality of blades(104) is represented by s, to optimize the blade profile for high airflow, the plurality of blades(104) are equally spaced hence the angle between the plurality of blades(104) s is 10.3°(10.3 Degree).
6. The system(100) as claimed in claim 1, wherein, Ø represents the exit angle of the plurality of blades(104) that affects the exit velocity of the blade and hence airflow speed, thus the exit angle of the plurality of blades(104) is 71.2°(71.2 Degree).
7. The system(100) as claimed in claim 1, wherein, to optimize the blade profile for high airflow, the chord length of the blade chord line(116) is 14.8 mm, and the radius of the blade chord line(116) is 12.2 mm.
8. The system as claimed 1 and 2, wherein, a method for an Air-conditioner scroll design system(100), the method comprising:
an air flow directed from the suction port(110) to the blowout port(112) when the fan rotor(102) rotates;
this causes the air in the indoor space to flow into the chassis scroll(108) through the suction area;
the heat is exchanged with the refrigerant when passing through the heat exchanger and air temperature changes accordingly;
after temperature change, air is sucked through the rotor fan(102), flows through an air flow path formed in the chassis scroll(108), and is blown out of the blowout port(112);
the air blown out of the rotor fan(102) is supplied into the indoor space through the blowout port(112), this air adjusts the temperature of the air in the indoor space;
characterized in that, the plurality of blades(104) are fixed on the periphery of the circumference of the fan rotor(102) along the center of axis(106) but the plurality of blades(104) are not parallel to the center of axis(106) of the fan rotor(102) thus creating a skew angle(?) between the center of axis(106) and the plurality of blades(104),
characterized in that, the crossflow fan(114) has a modular design, So one module delivers the air which the next module sucks, between the module, there is a variation in the flow pattern, and hence the flow is not continuous, so skew angle(?) is provided to the plurality of blades(104) to get continuous varying the fan rotor(102) pattern instead of interrupted airflow, this helps in generating a uniform flow through the crossflow fan(114), since the airflow becomes uniform and does not cause turbulence, the airflow noise is also reduced,
characterized in that, the blade profile along with the skew angle(?) is optimized to get high airflow in the system, less power consumption, and low noise.