AIR CONDITIONING UNIT

Abstract

An AC unit with a lifting mechanism to lift or lower the AC unit relative to an insulated duct installed at a windowsill next to an insulated and relatively thick grill is disclosed. The AC unit includes multiple air conditioning components, a thermal shield integrated inside a housing, a skirt, and the lifting mechanism. A base portion of the housing is coupled to the top frame of the lifting mechanism. The lifting mechanism includes a pair of scissors pivoted to the bottom frame and the top frame. A telescopic skirt is arranged inside the bottom of the housing. The lifting mechanism ensures inlet and exhaust ports of the AC unit are aligned in a colinear fashion with respect to the duct so that the AC unit cools the condenser faster without wastage of effective air coming out of the air conditioning that would otherwise be used for cooling the room.

Description

TECHNICAL FIELD OF INVENTION

The present invention relates to the field of air conditioning units, and more specifically, the present invention relates to a portable air conditioning unit with a novel lifting mechanism that can lift the air conditioning unit relative to an insulated duct installed at the windowsill such that intake and exhaust ports of the air conditioning unit are perfectly aligned to the channels of the duct in the same line without requiring any hoses/pipes, reducing the pressure drop on the air conditioning unit and increasing the overall efficiency of the portable air conditioning unit.

BACKGROUND

Typical portable air conditioning units 10 with a single hose or two hoses are known in the art. A portable air conditioning unit with a single hose uses a single hose for hot air discharge. Such a portable air conditioning unit with a single hose sucks the air from the room where they are installed and pushes the air inside the air conditioning unit to cool off the condenser and exhausts the hot air through the hose installed to discharge air out of the window. In such air conditioning units, about 50% of the air that comes out of the air conditioning unit is not used for cooling the room but rather used for cooling off the condenser portion and compressor portion.

In order to improvise the efficiency of existing portable air conditioning units with a single hose, portable air conditioning units with two hoses are made available as shown in FIG. 1. As seen in FIG. 1, the air conditioning unit 10 includes a hose 12 for hot air discharge and a hose 14 for bringing in cool air from outside to cool the condenser. The portable air conditioning units with two hoses also do not provide a satisfactory outcome in terms of efficiency and some of the air (say 30%) that comes out of the air conditioning unit is used for cooling the condenser portion of the air conditioning unit. This inefficiency is due to the pipes/hoses being smaller in size, producing friction (pressure drop) due to being curved to connect the air conditioning unit to the window panel 16. These conventional portable units typically include a provision (one or more side grills) 18 through which the air from the room is directed to the condenser portion of the unit for cooling the condenser. If the portable air conditioning unit is used to heat the room, the process is vice versa.

Further as seen in FIG. 1, in a typical portable air conditioning unit, the condenser portion of the unit is open to the room and creates a lot of noise. Thus, broadly speaking existing air conditioning units are inefficient on the one hand and noisy on the other hand. Additionally, the hoses 12,14 and window panel 16 used in the existing portable air conditioning unit are not insulated, which leads to the creation of a thermal bridge within the room which increases heat or cold in the room.

In the light of the foregoing, what is required is a portable air conditioning unit with a novel lifting mechanism that can lift the air conditioning unit relative to an insulated duct installed at the windowsill such that the intake and exhaust ports of the air conditioning unit are perfectly aligned to the channels of the duct reducing the pressure drop on the air conditioning unit and increasing the overall efficiency of the air conditioning unit. Also, the proposed air conditioning unit is designed to embody a thermal shield component separating the indoor portion from the outdoor portion of the air conditioning unit to reduce the noise produced within the air conditioning unit. Furthermore, the components such as a grill that fits in the window frame, the duct portion, and the ports of the air conditioning unit are all insulated to prevent any thermal bridge creation.

SUMMARY

The present invention relates to a portable air conditioning unit with a lifting mechanism that essentially lifts the air conditioning unit relative to an insulated duct installed at the windowsill such that intake and exhaust ports of the air conditioning unit are perfectly aligned to the channels of the duct in the same line without requiring any hoses/pipes, reducing the pressure drop on the air conditioning unit and increasing the overall efficiency of the portable air conditioning unit.

The portable air conditioning unit of the present invention comprises a housing/enclosure with various air conditioning components integrated there inside, an insulated grill or backplate mountable to a portion of a window and an insulated rectangular duct installed at the windowsill, and a lifting mechanism for lifting the housing/enclosure relative to the duct to properly align the ports of the air conditioning unit with the channels of the duct, and a telescopic skirt to conceal the lifting mechanism.

In another embodiment, the portable air conditioning unit of the present invention additionally comprises a prime mover with an operating device.

In a further embodiment, the portable air conditioning unit is capable of evaporating the meltwater accumulated from the condenser portion when in heating mode.

In a further embodiment of the present invention, the air conditioning unit additionally comprises a remote-control device for controlling the power supply to the prime mover in order to selectively adjust the height of the air conditioning unit through the lifting mechanism.

The present portable air conditioning unit provides the below-mentioned benefits over existing portable air conditioning units:

• • Proposed air conditioning unit is provided with a lifting mechanism, which can lift or move the housing or enclosure of the air conditioning unit relative to the window height to align the inlet and the exhaust ports of the air conditioning unit in a colinear fashion with respect to the insulated duct installed at the windowsill. With the proposed air conditioning unit, when the air conditioning unit needs to be installed, the user simply needs to install an insulated grill/backplate on the window portion, then install an insulated duct with the two channels related to the grill and then finally, move the air conditioning unit and operate the lifting mechanism integrated with the air conditioning unit to lift the housing/enclosure to the height of the duct installed at the windowsill to perfectly align the inlet and exhaust ports of the air conditioning unit with the channels of the duct. This aligned arrangement that do not require any hoses decreases the pressure drop that usually occurs in the prior art air conditioning unit.
  • The lifting mechanism can be manually controlled or controlled wirelessly by the remote-control device.
  • The proposed air conditioning unit is provided with a thermal shield in order to provide insulation for the sound/noise generated by the air conditioning components (particularly components belonging to the outdoor portion of the unit) such as fan, compressor, etc located within the housing/enclosure.
  • Further, since the inlet and the exhaust ports of the portable AC unit are aligned in a colinear fashion with respect to the insulated duct installed at the windowsill, the air conditioner does not require any other provision or grill on the sides to draw in air from the room to cool the condenser as in conventional portable air conditioning units.

These and other objects and advantages of the present invention will become more apparent as the description proceeds, reference being made to the following detailed description along with the accompanying drawings in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS

The accompanying drawings are included to provide a further understanding of the present disclosure of the window air conditioning unit and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the figures of the window air conditioning unit, similar components and/or features may have the same reference label. Further various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any of the similar components having the same reference label irrespective of the second reference label.

FIG. 1 shows a typical portable air conditioning unit with two hoses.

FIG. 2A shows a portable air conditioning unit or heat pump mounted adjacent to a window having an air duct, according to an embodiment of the present invention.

FIG. 2B shows a view of FIG. 2A without a skirt.

FIG. 3 illustrates a perspective view of the air conditioning unit of FIG. 2A with a lifting mechanism, according to an embodiment of the present invention.

FIG. 4 illustrates a rear perspective view of the air conditioning unit or heat pump with the lifting mechanism.

FIG. 5 illustrates a sectional view of the air conditioning unit of FIG. 2A without the lifting mechanism and skirt.

FIG. 6 illustrates a view of the skirt portion of the air conditioning unit in an extended position.

DETAILED DESCRIPTION

As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise. If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.

Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).

Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing. In some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements. For the purpose of this disclosure, the term “air conditioner”, or “air conditioning unit” essentially means a heat pump adapted for heating or cooling a designated space.

The present invention relates to an improved portable air conditioning unit 100. The air conditioning unit or heat pump 100 is capable of being mounted relative to a window 200 of the office, home, workplace, etc. as seen in FIGS. 2A and 2B to fulfil air conditioning needs. The air conditioning unit 100 is a single unit with all required air conditioning components contained inside a housing/enclosure 110. The air conditioning unit 100 can be plugged into a traditional electrical outlet for it to get operational. It should be understood that the proposed portable air conditioning unit 100 has been designed with the aim to increase the efficiency of the air conditioning unit by eradicating the requirements for hoses/pipes used in the traditional portable units that create pressure drops in the units and also to provide a thermal shield for noise reduction during the operation of the air conditioning unit. Additionally, the air conditioning unit 100 and various parts thereof are insulated to reduce or eliminate any kind of thermal bridge creation that usually occurs due to window panels, back grill, and hose pipes used in the case of traditional air conditioning units as discussed in the background section of the invention with respect to FIG. 1.

Referring now to FIGS. 3, 4, and 5, the air conditioning unit 100 essentially includes a housing/enclosure 110, an insulated duct portion 120, a relatively thick and insulated grill/backplate 130, a skirt 140, and a lifting mechanism 150.

The housing 110 is configured to include all the required air conditioning components such as but not limited to a heat exchange component 160, and an air blower 161, a compressor (not seen), one or more filters (not seen), all strategically placed inside the housing 110. The functioning of these components is not described herein to keep the description more concise to the novel aspect of the invention. One skilled in the art can relatively understand the functioning of the proposed air conditioning unit's components are essentially the same as existing air conditioning units. As a differential component, the housing 110 includes a thermal shield 110a (FIG. 5) in order to provide insulation against the sound/noise generated by the air conditioning components such as fan, compressor, etc located within the housing/enclosure 110 when the air conditioning unit 100 is operated. Particularly, the thermal shield 110a is a box-like structure that seals an outdoor portion of the air conditioning unit 100 with an indoor portion, reducing the noise generated by the outdoor components of the air conditioning unit 100. The housing 110 is also preferably a box-like enclosure having a base portion 111 and at least two back openings 112, 113 for allowing the air to enter and exit air conditioning unit 100. In the preferred embodiment, the openings 112, 113 are located at the rear top of the housing 110. The openings 112, 113 are preferably disposed of opposite the vents 111a on a rear wall 110b of the housing 110. The first opening 112 lets the fresh cold air from outside enter the housing 110 to cool the condenser portion. Similarly, the second opening 113 acts as an exiting port for the hot air to leave the housing 110. Both openings 112, 113 are provided with extending outward protrusions 112a, and 113a respectively (extending from the rear wall 110b of the housing 110). In the preferred embodiment, the openings 112, and 113 are rectangular in shape. In another embodiment, the openings 112, and 113 may be triangular, square, circular, semicircular, quadrilateral, or polygonal such as pentagon, hexagon, etc. in shape.

The duct 120 is an insulated duct that provides an isolated passage for airflow and also serves to prevent air leakage (due to being insulated). The duct 120 is rectangular in shape and has two air channels 122, 123. The duct 120 is installed on a windowsill 202 with the channels 122, 123 aligned with the grill 130 mounted on the window 200. In the preferred embodiment, the air channels 122, 123 are parallel to each other. In another embodiment, the air channels 122, 123 may not be parallel. The outward protrusion 112a at the back of the housing 110 fits into a first opening 122a of the first channel 122 and fits leaving no gaps to allow any thermal bridge creation. The outward protrusion 113a at the back of the housing 110 fits into the first opening 123a of the second channel 123 and fits leaving no gaps to allow any thermal bridge creation. The protrusions 112a, and 113a fit inside the first opening 122a, 123a respectively by means of press-fitting, intermediate fitting, or using a latching member or any other suitable means. This aligned configuration of ports 112, 113 of the portable AC unit 100 with the duct's channels 122,123 is advantageous over the existing portable AC unit shown in FIG. 1 where the inlet and exhaust ports of the AC units are not aligned with the window rather the inlet and exhaust ports of the AC unit are connected to the window panel using hose pipes of short length that leads to pressure drop in the AC unit and creates thermal bridge creation. Also, prior existing portable ACs such as the AC unit 10 shown in FIG. 1 use one or more side grills 18 located on the sides of the unit to draw in some room air to cool the condenser thereby lowering the overall efficiency of the portable AC unit. In contrast to this, in the proposed portable AC unit 100, the ports 112,113 are aligned to the duct 120 lifting the AC unit 100 relative to the height of the window helps in the more efficient working of the AC unit 100 because it leads to drawing of more air from the outside environment to cool the condenser portion by reducing pressure drop on the air conditioning unit.

A rectangular grill 130 is mounted onto a selected area of the window 200 by means of suitable fasteners. The grill is made relatively thick (Eg. 1.5″ for example) and insulated to prevent any thermal bridge creation when the grill 130 is installed in the window panel. The grill 130 is provided with a plurality of vents 131. The vents 131 guide the air flow entering the air channel 122 and leaving the air channel 123. The vents 131 also partially prevent the dust particles in the air and water droplets from entering the channels 122, 123. These vents 131 provided on the grill or backplate 130 installed on the window panel can cover a larger surface area compared to the conventional hose which would allow the air conditioning unit 100 to draw in and/or exhaust out more amount of air. The grill 130 has two openings 132, 133. Both openings 132, 133 are provided with outward protrusions 132a, 133a with a predefined length. The first outward protrusion 132a gets fitted inside the second opening 122b of the first channel 122 of the insulated duct 120. The second outward protrusion 133a gets fitted inside the second opening 123b of the second channel 123 of the insulated duct 120.

The air conditioning unit 100 (i.e opening 112) pulls in the cool air from outside that travels through the first protrusion 132a of the grill 130, the first channel 122, and the first opening 112. The air conditioning unit 100 exhaust out the hot air from inside through the opening 113, the second channel 123, and the second protrusion 133a of the grill 130. As essence of this invention, the openings 112, and 113 get aligned with the channels 122,123 of the duct 120 collinearly relieving pressure drop on the air conditioning unit 100 and increases efficiency compared to the existing air conditioners wherein the openings/ports 112, 113 of the air conditioning unit 100 are not aligned to the window panel and are usually connected using pipes/hoses as discussed with respect to FIG. 1.

The base portion 111 of the housing 110 is integrated into a top frame 151 of the lifting mechanism 150. In the preferred embodiment, the base portion 111 is press-fitted onto the top frame 151 or bolted, screwed, or just placed on the top surface 152 of the top frame 151. In an alternative embodiment, the top frame 151 is adjustable which allows the operator to customize the top surface 152 as per base portion 111 of the housing 110.

The lifting mechanism 150 includes at least a pair of scissors 154, 155 dynamically connecting the bottom frame 153 to the top frame 151. In an alternative embodiment, the lifting mechanism 150 may include more than one pair of scissors movably connected together for establishing a dynamic connection between the bottom frame 153 and the top frame 151. The top frame 151 and the bottom frame 153 each include at least a pair of top beams 151a, 151b, and a pair of bottom beams 153a, 153b. The first scissor 154 includes a first link 156 and a second link 157. The first link 156 is pivoted to the first beam 153a of the bottom frame 153 at a first end E1 thereof and to the first beam 151a of the top frame 151 at the second end E2 thereof. The second link 157 is pivoted to the first beam 153a of the bottom frame 153 at a second end E2 thereof and to the first beam 151a of the top frame 151 at the first end E1 thereof. The scissor 155 includes a third link 158 and a fourth link 159. The third link 158 is pivoted to the second beam 153b of the bottom frame 153 at the first end E1 thereof and to the second beam 151b of the top frame 151 at the second end E2 thereof. The fourth link 159 is pivoted to the second beam 153b of the bottom frame 153 at the second end E2 thereof and to the second beam 151b of the top frame 151 at the first end E1 thereof.

The first link 156 and the third link 158 are pivoted using a first pivot pin 170 and a fourth pivot pin 174 (not seen). Similarly, the second link 157 and the fourth link 159 are pivoted using a second pivot pin 171 and a fifth pivot pin 173. The first link 156, the second link 157, the third link 158, and the fourth link 159 are pivoted together using a third pivot pin 172. The first pivot pin 170, the second pivot pin 171, the third pivot pin 172, the fourth pivot pin 174, and the fifth pivot pin 173 are parallel to each other. The first beam 153a and the second beam 153b are provided with notches 153n, 153m for resting the third pivot pin 172, when the lifting mechanism 150 is at a retracted position. At the retracted position, the first link 156, the second link 157, and the first beams 151a, 153a of the top and bottom frames 151, 153 respectively come closure to each other. Similarly, at the retracted position, the third link 158, the fourth link 159, and the second beams 151b, 153b of the top and bottom frames 151, 153 respectively come closure to each other.

At an extended position as seen in FIGS. 2B and 3, all links 156, 157, 158, and 159 rotate about the pivot pins 170, 171, 172, and 173 from their initial positions to a final position to achieve the required height of the top surface 152 of the top frame 151. In an embodiment, the lifting mechanism 150 may be manually operated. In another embodiment, the lifting mechanism 150 may be auto-controlled using switches, remote device, etc.

The housing 110 of the air conditioning unit 100 is designed to embody a telescopic skirt 140 arranged inside an extended side frame 115 of the housing 110. The skirt 140 has a plurality of sliding members 141, 142, 143 as seen in FIG. 6. Each sliding member 141, 142, 143 has at least three surfaces viz. front surface 141a, 142a, 143a, left surface 141b, 142b, 143b and right surface 141c, 142c, 143c respectively. The left surface 142 is perpendicularly extended from the front surface 141 at the left end. The right surface 143 is perpendicularly extended from the front surface 141 at the right end. The sliding members 141, 142, and 143 are slidably connected to each other using a known sliding mechanism 190. The sliding members 141, 142, 143 slide down to the ground surface under the effect of gravity when the air conditioning unit 100 is lifted up using the mechanism 150. The sliding members 141, 142, 143 slide down to a distance that is equal to the height raised by the lifting mechanism 150. The well-known sliding mechanisms 190 are the sliding arm mechanism, pivot arm mechanism, notch-arm mechanism, etc. The skirt 140 covers the lifting mechanism 150 and improves the aesthetic of the unit 100 when installed in the room as seen in FIG. 2A.

The bottom frame 153 is optionally provided with pair of wheels 191, 192. The pair of wheels 191, 192 allow the lifting mechanism 150 to move the air conditioning unit 100 without much human effort.

Further, the air conditioning unit 100 is enabled to heat and evaporate the melt water from the condenser portion. In an example embodiment, the housing 101 may embody a try (not seen), equipped with a heating element to heat the accumulated water into the tray.

In one more embodiment, the air conditioning unit 100 is provided with the prime mover. The prime mover (not seen) may be a mechanical prime mover such as a motor, lead screw, a hydraulic prime mover, a pneumatic prime mover, a hydro-pneumatic prime mover, a magnetic prime mover, or an electromagnetic prime mover. The prime mover supplies power to the third pivot pin 172 to rise or lower the housing 110 relative to the required height of the duct 120 configured at the window sill 202. The prime mover is provided with an operating device. The operating device may be a lever, a switch, a knob, a button, a spring-loaded push button, etc. The operating device is used for switching ON and OFF the prime mover.

In one more embodiment, the prime mover is connected to the controller using a wireless communication module or a wired communication module. The controller is further connected to the remote-control device. The controller receives the command from the user via a remote-control device to raise or lower the height of the air conditioning unit 100. Upon receiving the command, the controller regulates the required power supply to the prime mover for adjusting the position of the third pivot pin 172 and subsequently the height of the air conditioning unit 100. The well-known remote-control devices are mobile, tablet, laptop, computer or wireless communication enabled controlling devices, etc.

It should be understood according to the preceding description of the present invention that the same is susceptible to changes, modifications and adaptations, and that the said changes, modifications and adaptations fall within scope of the appended claims

Claims

1. An air conditioning unit (100), comprising: a housing (110) comprising a base (111) and at least two back openings (112, 113) acting as inlet and exhaust air ports for drawing in cool air from outside and exhausting hot air out of the air conditioning unit (100) respectively, wherein the housing (110) embodies a thermal shield (110a) configured there inside to insulate the sound generated by one or more air conditioning components located within the housing (110);an insulated grill (130) mounted onto a desired portion of a window (200) and is provided with at least two protruded openings (132, 133);an insulated duct (120) with at least two air channels (122, 123) configured on a windowsill (202) of the window (200) in lined with the protruded openings (132, 133) of the insulated grill (130), wherein the at least two air channels (122, 123) of the insulated duct (120) are in line with the at least two back openings (112, 113) of the housing (110) to form a continuous and collinearly arranged air pull-in passage and air pull-out passage respectively;a lifting mechanism (150) that mechanically rises or lower the housing (110) relative to the insulated duct (120) mounted on the window sill (202) to form said continuous and collinearly arranged air pull-in passage and air pull-out passage; anda thermal shield strategically positioned within the housing (110) to isolate the outdoor components and provide sound insulation by lowering the noise produced by the outdoor components configured within the housing (110).

2. The air conditioning unit (100) of claim 1, wherein the one or more air conditioning components are at least a fan, a compressor, a heat exchange component (160), and an air blower (161), a compressor, one or more filters.

3. The air conditioning unit (100) of claim 1, wherein the thermal shield (110a) is a box-like structure adapted to seal an outdoor portion of the air conditioning unit 100 with the indoor portion, reducing the noise generated by the one or more air conditioning components located in the outdoor portion.

4. The air conditioning unit (100) of claim 1, wherein the at least two back openings (112, 113) are disposed of opposite one or more vents (111a) on a rear wall (110b) of the housing (110).

5. The air conditioning unit (100) of claim 4, wherein the at least two back openings (112, 113) are provided with extending outward protrusions (112a, 113a) respectively extending from the rear wall 110b of the housing 110.

6. The air conditioning unit (100) of claim 4, wherein the at least two back openings (112, 113) are at least rectangularly shaped, square-shaped or circularly shaped.

7. The air conditioning unit (100) of claim 1, wherein the insulated duct (120) is rectangularly shaped.

8. The air conditioning unit (100) of claim 5, wherein the extending outward protrusions (112a, 113a) of the backside openings (112, 113) of the housing (110) are in lined with the at least two air channels (122, 123) of the insulated duct (120).

9. The air conditioning unit (100) of claim 5, wherein each of the extending outward protrusions (112a, 113a) of the backside openings (112, 113) fit inside a first opening (122a) and a first opening (123a) of the at least two air channels (122, 123) respectively by means of at least press-fitting, intermediate fitting, or using a latching member to prevent a thermal bridge creation.

10. The air conditioning unit (100) of claim 1, wherein the insulated grill (130) is made relatively thick about 1.5″ to prevent any thermal bridge creation, and wherein the insulated grill (130) is provided with a plurality of vents (131).

11. The air conditioning unit (100) of claim 10, wherein the insulated grill (130) covers a larger surface area compared to the conventional hose allowing the air conditioning unit (100) to draw in and/or exhaust out more amount of air.

12. The air conditioning unit (100) of claim 1, wherein the at least two protruded openings (132, 133) of the insulated grill (130) are provided with outward protrusions (132a, 133a) wherein a first outward protrusion (132a) is adapted to fit inside the second opening (122b) of the first channel (122) of the insulated duct (120) and a second outward protrusion (133a) is adapted to fit inside the second opening (123b) of the second channel (123) of the insulated duct (120).

13. The air conditioning unit (100) of claim 1, wherein the lifting mechanism comprising: a top frame (151) integrated with the base portion (111) of the housing (110);a bottom frame (153) configured to withstands the weight of the air conditioning unit (100), wherein the bottom frame (153) is optionally provided with pair of wheels (191, 192); andat least a pair of scissors (154, 155) dynamically connecting the top frame (151) to the bottom frame (153) and having a plurality of links (156, 157, 158, 159) pivoted together using a plurality of pivot pins (170, 171, 172, 173, 174).

14. The air conditioning unit (100) of claim 13, wherein each of the top frame (151) and the bottom frame (153) comprises at least a pair of top beams (151a, 151b), and a pair of bottom beams (153a, 153b) respectively.

15. The air conditioning unit (100) of claim 13, wherein the plurality of pivot pins (170a, 171, 172, 173, 174) are parallel to each other.

16. The air conditioning unit (100) of claim 13, wherein the pair of bottom beams (153a, 153b) are provided with a pair of notches (153n, 153m) for resting the third pivot pin (172) when the lifting mechanism (150) is at a retracted position.

17. The air conditioning unit (100) of claim 16, wherein at the retracted position a first link (156), and a second link (157) of the plurality of links (156, 157, 158, 159), and the first beams (151a, 153a) of the top and bottom frames (151, 153) respectively come closure to each other; anda third link (158), and a fourth link (159) of the plurality of links (156, 157, 158, 159), and the second beams (151b, 153b) of the top and bottom frames (151, 153) respectively come closure to each other.

18. The air conditioning unit (100) of claim 13, wherein the plurality of links (156, 157, 158, 159) rotate about the plurality of pivot pins (170, 171, 172, 173) from their initial positions to a final position to achieve the required height of a top surface (152) of the top frame (151).

19. The air conditioning unit (100) of claim 1, wherein the lifting mechanism 150 is at least manually operated or auto-controlled using switches, and remote devices.

20. The air conditioning unit (100) of claim 1, wherein the housing (110) is configured to embody a telescopic skirt (140) arranged inside an extended side frame (115) of the housing (110).

21. The air conditioning unit (100) of claim 20, wherein the telescopic skirt 140 comprises plurality of sliding members (141, 142, 143), wherein each of the sliding members (141, 142, 143) comprises at least three surfaces viz. front surface (141a, 142a, 143a), left surface (141b, 142b, 143b) and right surface (141c, 142c, 143c) respectively.

22. The air conditioning unit (100) of claim 21, wherein the left surface (142) is perpendicularly extended from the front surface (141) at a left end, and the right surface (143) is perpendicularly extended from the front surface (141) at a right end.

23. The air conditioning unit (100) of claim 22, wherein the sliding members (141, 142, 143) are slidably connected to each other using a known conventional sliding mechanism (190) and configured to slide down to the ground surface under the effect of gravity when the air conditioning unit (100) is lifted up using the lifting mechanism (150).

24. The air conditioning unit (100) of claim 23, wherein the sliding members (141, 142, 143) slide down to a distance that is equal to the height raised by the lifting mechanism (150).