DESC:FIELD OF THE INVENTION
The present invention is related to field of Window AC with cross-flow fan for high energy savings, better cooling efficiency and increased reliability by giving better derating performance, precisely present invention is related to increased efficiency of the air flow with independent motor, involute housing design, evaporator design.
BACKGROUND OF THE INVENTION
Air conditioning systems are widely used to maintain comfortable indoor temperatures in a variety of settings. Window-mounted air conditioners are a popular choice for single-room cooling applications due to their ease of installation and cost-effectiveness. However, despite their widespread use, traditional window air conditioners have several limitations. They often suffer from uneven airflow distribution, leading to hotspots and cold spots within the conditioned space. Additionally, the noise generated by the centrifugal fan can be disruptive to occupants and nearby residents, causing discomfort and potential disturbances. Global Warming has led to design of AC systems with energy efficiency especially in the cooling space where more energy is consumed to modify or maintain the room temperature for human comfort condition. To increase the efficiency of the AC system, the heat transfer efficiency of the heat exchangers needs to be improved. This can be achieved by many ways. One such way is by increasing the air flow of the system that take away the heat energy from the heat exchanger. In the current aspect of the design window AC is focused. Window AC, in general, consists of two fans, one is the indoor blower and the other is outdoor fan. Both these, fans are run by single motor. Because of this, there is no independent speed control. So, in this invention, the blower design for the indoor side is modified to get the independent speed control as well as get best overall cooling efficiency.

WO2020155355A1 discloses a window type air conditioner (10). The window type air conditioner (10) is supported on a window opening (31) of the wall (3), and a movable window (4) is provided in the window opening (31). The window type air conditioner (10) comprises a machine case (2); a receiving groove (21) is formed in a peripheral wall of the machine case (2); the top, the left side and the right side of the receiving groove (21) are opened; the machine case (2) is separated into an indoor part and an outdoor part by the receiving groove (21); at least part of the window (4) can extend into the receiving groove (21); an indoor heat exchanger and an indoor fan are provided in the indoor part; and an outdoor heat exchanger and an outdoor fan are provided in the outdoor part.

The existing invention does not provide independent speed control of two fans of windows air conditioner (indoor blower and outdoor fan) therefore, there is a need for an improved system to provide independent speed control of two fans of windows air conditioner (indoor blower and outdoor fan) thus providing maximum air flow and increasing the overall efficiency.

OBJECTIVE OF THE INVENTION
The main objective of the present invention is to design & develop a window air conditioner with cross-flow fan that provide comfort to human being with high air flow.
Another objective of the present invention is to design & develop a window air conditioner with cross-flow fan that develops independent control for the outdoor fan which increases the reliability of the system by giving better performance in the derating of the air conditioner.
Yet another objective of the present invention is to design & develop a window air conditioner with cross-flow fan that provide comfort to human being with more energy efficiency.
Yet another objective of the present invention is to designs & develops a window air conditioner with cross-flow fan that provide high cooling performance.
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 window air conditioning system with a cross-flow fan. The system of the present invention includes a cooling cabinet and a heat rejection cabinet. The cooling cabinet is the cabinet in window air conditioning system that deals with cooling process of indoor room. The cooling cabinet includes an evaporator coil, a cross-flow fan, a cross-flow fan motor, an air duct and an suction guide. Herein, the cross-flow fan is used in the current aspect of the design, the cross-flow fan is used for creating a forced draft flow in the evaporator coil. The cross-flow fan provides a continuous air flow throughout the discharge of the window air conditioning system. The cross-flow fan motor is coupled to the cross-flow fan and the cross-flow fan motor rotates the cross-flow fan. The air duct provides a path to air to pass through the cross-flow fan. The cross-flow fan is attached to the air duct. The suction guide guides the air towards the cross-flow fan that helps in increasing the air flow performance. The suction guide provides structural support to the air duct and the cooling cabinet. The heat rejection cabinet is the cabinet in window air conditioning system that rejects the heat absorbed from the room to the outdoor environment and ambient. The heat rejection cabinet includes a heat rejection cabinet motor, a motor support column, a blower fan and a condenser coil. Herein, the heat rejection cabinet motor is attached to the motor support column, the motor support column provides structural support to heat rejection cabinet motor. The blower fan is coupled with the heat rejection cabinet motor. The condenser coil is efficiently designed for the blower fan and rotational speed is able to be changed for the heat rejection required, thus not limiting to the indoor rotational speed of the cross-flow fan motor. Herein, the cross-flow fan motor and the heat rejection cabinet motor work as independent motors for the cooling cabinet and the heat rejection cabinet respectively that helps in optimal use of space available inside window air conditioning system. Herein, since the blower fan size reduced significantly and the heat rejection cabinet size is also reduced, as the size is reduced, the overall weight of the component is reduced which helps in saving the resources. Herein, in the heat rejection cabinet, the heat rejection cabinet motor is decoupled from the cross-flow fan of the cooling cabinet that helps in controlling the blower fan speed independently. Thus, the airflow from the condenser coil is controlled based on the requirement of the condenser coil conditions. The blower fan is optimized for high airflow per unit watt of power consumed so that the overall efficiency of the system is increased. Herein, decoupling of the heat rejection cabinet motor and the cross-flow fan, and improving the air flow design on the condenser coil and the evaporator coil has led to the improvement in the overall efficiency of the window air conditioning system. Herein, the cross-flow fan is used for creating a forced draft flow in the evaporator coil. The cross-flow fan provides a continuous air flow throughout the discharge of the window air conditioning system. Due to continuous air flow, the turbulence level is reduced and much more uniform flow is generated, because of this noise level in the air flow is reduced and increases the human mental comfort. Herein, since the cross-flow fan is used in the current aspect of the design rather than the blower, the structural design of the fan becomes compact, the space required for the housing and fan is smaller compared to the bigger blowers. Thus. the fan space can be optimized and reused for other components. Herein, the cross-flow fan can rotate independently and hence can rotate in high speed, this allows the flow velocity to be increased or decreased based on the user requirement, the air velocity is increased that is directly proportional to the air throw of the fan, thus the air throw is increased because of using the cross-flow fan that automatically improves the cooling rate of the room.
The main advantage of the present invention is that the present invention designs & develops a window air conditioner with cross-flow fan that provide comfort to human being with high air flow.
Another advantage of the present invention is that the present invention designs & develops a window air conditioner with cross-flow fan that develops independent control for the outdoor fan which increases the reliability of the system by giving better performance in the derating of the air conditioner.
Yet another advantage of the present invention is that the present invention designs & develops a window air conditioner with cross-flow fan that provide comfort to human being with more energy efficiency.
Yet another advantage of the present invention is that the present invention designs & develops a window air conditioner with cross-flow fan that provide high cooling performance.
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 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 exploded view of the cooling cabinet of window air conditioner with cross-flow fan.
Fig.2. illustrates the sectional view of the heat rejection cabinet of window air conditioner with cross-flow fan.
Fig.3. illustrates the cross-sectional view of window air conditioner with cross-flow fan showing cooling process.
Fig.4. illustrates the outer structure of window air conditioner with cross-flow fan.
Fig.5. illustrates the profiles of a suction guide.

DETAILED DESCRIPTION OF THE INVENTION
Definition
The term “a” or “an”, as used herein, is defined as one. The term “plurality”, as used herein, is defined as two as or more than one. 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 “comprising” is not intended to limit the present invention with such terminology rather is used in a wider sense. Any invention using the term comprising could be separated into one or more claims using “consisting” or “consisting of”. The term “comprising” may be used interchangeably with the terms “having” or “containing”.
Reference in this document to “one embodiment”, “certain embodiments”, “an embodiment”, “another embodiment”, and “yet another embodiment” or similar terms, throughout the document means that a specific 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 in various places, this specification throughout are not necessarily all referring to the same embodiment. Furthermore, the specific 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 inclusive or meaning any one or more combinations. 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 mutually exclusive, inherently.
As used herein, the term "one or more" generally refers to, but is 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 is 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 the exploded view of the cooling cabinet(102) of window air conditioner with cross flow fan. The cooling cabinet(102) includes a evaporator coil(106), a cross flow fan(104), a cross flow fan motor(138), an air duct(114) and an suction guide(116). The cross flow fan(104) is used for creating a forced draft flow in the evaporator coil(106). The air duct(114) provides path to air to pass through the cross flow fan(104), the cross flow fan(104) is attached to the air duct(114). The cross flow fan motor(138) is coupled to the cross flow fan(104).The suction guide(116) guides the air towards the cross flow fan(104) that helps in increasing the air flow performance. The suction guide(116) provides structural support to the air duct(114) and the cooling cabinet(102). The cooling cabinet(102) having a facia(108). The facia(108) consisting of an air blow portion(110) and an air suction portion(112).
Fig.2. illustrates the sectional view of the heat rejection cabinet(118) of window air conditioner with cross flow fan. The heat rejection cabinet(118) includes a heat rejection cabinet motor(124), a motor support column(126), a blower fan(122) and a condenser coil(120). Herein, the heat rejection cabinet motor(124) is attached to the motor support column(126). The motor support column(126) provides structural support to heat rejection cabinet motor(124). The blower fan(122) is coupled with the heat rejection cabinet motor(124).
Fig.3. illustrates the cross-sectional view of window air conditioner with cross flow fan showing cooling process. A cross flow fan(104) rotates and generate suction pressure. The air duct(114) provides path to air to pass through the cross flow fan(104), the cross flow fan(104) is attached to the air duct(114). The suction guide(116) guides the air towards the cross flow fan(104) that helps in increasing the air flow performance. The suction guide(116) provides structural support to the air duct(114) and the cooling cabinet(102). Hot air inside the room is sucked through an air suction portion(112)of a window air conditioning system(100). The hot air is passed through a evaporator coil(106) of a cooling cabinet(102). The evaporator coil(106) of the cooling cabinet(102) removes humidity from the hot air and cools down the hot air into cold air. The cold air is passed through the cross flow fan(104). The cross flow fan(104) circulates the cold air and sends the cold air to an air blow portion(110). The air blow portion(110) blows the cold air inside the room.
Fig.4. illustrates the outer structure of window air conditioner with cross flow fan. The system(100) has, an outer structure consisting of a top panel(128), a front panel(130), a left panel(132), a right panel(134), a bottom panel(136). Window air conditioner has a facia(108) consisting of an air blow portion(110) and an air suction portion(112).
Fig.5. illustrates profile of a suction guide(116). The suction guide(116) helps in increasing the efficiency and maintaining the suction pressure constant. The ratio of A/W needs to be maintained at 0.85 to 0.9. Also, the length A should be in the order of A1