US20240280274A1

US20240280274A1 - Air conditioner and method for installing the same

Info

Publication number: US20240280274A1
Application number: US18/632,354
Authority: US
Inventors: Xiyu Long
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2024-08-22

Abstract

An air conditioner includes: an indoor unit; an outdoor unit; and a rigid connecting part which integrating the indoor unit and the outdoor unit; wherein the rigid connecting part has an indoor portion and an outdoor portion; the indoor unit is placed and mounted on the indoor portion of the rigid connecting part; and the outdoor unit is mounted to the outdoor portion of the rigid connecting part. A method for installing the air conditioner includes steps of: 1) opening a slot on a wall; and 2) inserting and mounting the air conditioner into the slot. With the foregoing structure and installation method, the air conditioner has the advantages of conventional window-type air conditioners such as being simple to install, cost-saving, and easy to maintain, as well as has the advantages of conventional split-type air conditioners such as long service life, sleek-looking, and being quiet.

Description

BACKGROUND OF THE PRESENT INVENTION

Field of Invention

The present invention relates to a technical field of air conditioning, and more particularly to an air conditioner and a method for installing the same.

Description of Related Arts

An air conditioner (AC) is a system or a machine that treats air in a defined, usually enclosed area via a refrigeration cycle in which warm air is removed and replaced with cooler air. Some air conditioners can reverse the refrigeration cycle and act as an air source heat pump. Thus, it heats instead of cooling the indoor environment. Most air conditioners provide both the cooling and heating functions.
Cooling in conventional air conditioner is accomplished using the vapor-compression cycle, which uses a refrigerant's forced circulation between indoor and outdoor units of the air conditioner, as well as phase change between gas and liquid to transfer heat. The vapor-compression cycle can occur within an evaporator coil in the indoor unit and a condenser coil in the outdoor unit. Under heating mode, the evaporator coil in the indoor unit switches roles and becomes a condenser, producing heat. The condenser coil in the outdoor unit also switches roles to serve as an evaporator and discharges cold air (colder than the ambient outdoor air).
Most modern air conditioners feature a dehumidification cycle during which the compressor runs. At the same time, the fan is slowed to reduce the evaporator temperature and condense more water. The air first passes over the evaporator coil in the indoor unit, where it is cooled and dehumidified. Water condensed during dehumidification will be sent to the outdoor unit through a water copper pipe, where it is discharged.
To perform the above cycles, conventional home air conditioning systems (12000 BTU or lower) can be generally divided into two types: window-type air conditioner and split-type air conditioner.
The window-type air conditioner is a self-contained unit, which sits on a windowsill of your home. The condenser sits outside, while the indoor unit sits within the home, usually flush with the window it is popping out. This allows for the unit to have a semi-permanent nature about it and is perfect for rental homes should the tenants want air conditioning they can essentially ‘take with them’. Working on a similar concept as the window-type air conditioner, the split-type air conditioner has two separate sections, connected via pipes. An outdoor unit is outside on an external wall of your home and an indoor unit place in one or more rooms inside your home. The indoor unit is usually placed high on an internal wall, allowing for the cool air to be circulated the room with little to no distribution to your floor space.
As the window-type air conditioner is an ‘all in one’ system, the noise comes from the indoor unit/outdoor unit straight into the room in which the cool air is being pushed into. Due to the lack of effective sound insulation, electric fans of the indoor and outdoor units, the fan motor and the compressor will all generate noise during operation, and even outdoor sound will be transmitted into the room. This can make the units very noisy for a sitting or sleeping room. In contrast, with the split-type air conditioner, the outdoor unit is placed outside on an external wall of the home or office making them a lot quieter to operate. Furthermore, the indoor unit fan of the split-type air conditioner usually has a good mute effect, and fan speed of the indoor and outdoor units can be adjusted and controlled individually according to the needs, so as to achieve the effect of power saving.
Since the window-type air conditioner comes as a single unit, it is easier to set up than the split-type. You need to attach the brackets, lift the unit into the pre-drilled hole in the wall, and plug it in. The installation procedure for the split-type is more difficult because there is an indoor unit and an outdoor unit, which will need a licensed professional technician to install its multiple parts and systems. However, a split-type air conditioner does not block sunlight and does not take up space in the window. It also sits high on your wall, out of sight most of the time.
The split-type air conditioners are generally more efficiency than the window-type ones due to the difference in insulation. Window air conditioning units typically allow some heat from outside to enter through the unit and gaps in the window frame in which the unit is installed.
Window-type air conditioners are easier to maintain than split-type air conditioners due to their compact design. In fact, you can even perform the majority of the maintenance tasks yourself. Due to the complexity of split type models, hiring a certified technician to maintain your unit for you is highly suggested. This will come at an additional cost, though.
The window-type air conditioner is the more affordable of the two. The split-type air conditioner will require a more substantial initial investment. However, the split-type air conditioner eventually ends up providing better cost savings on electricity than the window-type air conditioner with generally more efficient and widespread room cooling. However, because the periodic maintenance will need the expertise of a technician, that is one more thing to consider when calculating the costs over time.
Both the window-type and split-type air conditioners have their own advantages and shortcomings. It is very difficult for consumers to decide which one to pick up. However, neither of the two has a fresh air system, due to climate, dust, flotsam, air pollution and other reasons, people have to close the daily “vent”—doors and windows, which inevitably lead to more serious indoor air problems such as germs, lack of oxygen, formaldehyde, fumes and so on. These problems make the indoor air a new “disaster area”, especially for bedroom and living room where fresh air is required. Theses health-related factors are the defects of conventional home air conditioners.
Therefore, it would be nice if a novel air conditioner could be developed to have the advantages of both the window-type air conditioners and the split-type air conditioners, as well as a fresh air system.

SUMMARY OF THE PRESENT INVENTION

An object of the present invention is to provide an air conditioner and a method for installing the same, which combine advantages of conventional window-type and split-type air conditioners, and is suitable for the site where conventional window-type air conditioner is used, easy to install, quieter and more energy-saving than the conventional window-type air conditioner, and equipped with a fresh air system, so that people can get fresh air in a closed room, favorable to human health.
Accordingly, in order to accomplish the above object, the present invention provides an air conditioner, comprising:

- an indoor unit;
- an outdoor unit; and
- a rigid connecting part which integrating the indoor unit and the outdoor unit;
- wherein the rigid connecting part has an indoor portion and an outdoor portion; the indoor unit is placed and mounted on the indoor portion of the rigid connecting part; and the outdoor unit is mounted to the outdoor portion of the rigid connecting part; the rigid connecting part comprises a fresh air vent for introducing fresh air, and a movable vent cover to control an opening size of the fresh air vent.

The integrated structure of the present invention provides the air conditioner advantages of conventional window-type air conditioners such as being simple to install, cost-saving, and easy to maintain. At the same time, the indoor unit and the outdoor unit are connected by the rigid connecting part, which makes them work individually to some extent, just like the conventional split-type air conditioners, which have long service life, sleek-looking, and being quiet.
Preferably, the rigid connecting part has a tunnel, and a copper pipe is placed in the tunnel, so as to contain pipes and cables connected between the indoor unit and the outdoor unit.
Preferably, a limiting bar is mounted on the indoor unit; the limiting bar is configured to contact a wall for positioning the indoor unit during installation. The limiting bar is configured to contact the wall and prevent the indoor unit from be further inserted when the indoor unit is inserted into the slot by a certain distance.
Preferably, the outdoor unit is hung on the outdoor portion of the rigid connecting part. By adopting such structure, the noise from the outdoor unit can be greatly reduced since the indoor and outdoor units are “split”. On the contrary, outdoor unit of the window-type air conditioner is literally outside the room hanging from a window and the vibrations will resound in the unit. This makes using it noisier than a split-type model.
Preferably, a rubber pad is placed on a back of the outdoor unit, which can further inhibit vibration of the outdoor unit.
Preferably, the outdoor unit is placed and mounted on the outdoor portion of the rigid connecting part, and top portions of the indoor unit and the outdoor unit are connected by an additional connecting piece. With such structure, the air conditioner of the present invention looks more like a conventional window-type device, but with the advantages of split-type ones. Furthermore, the installation and maintenance of the air conditioner are also as convenient as copper pipe of the conventional window-type device.
Preferably, a gap is left on a back of the outdoor unit for air intaking, and the gap is 2 inches.
Preferably, a soundproofing panel is arranged on a back of the indoor unit; the soundproofing panel comprises an acoustic layer and a steel layer; the steel layer is larger than the acoustic layer, so as to fix the soundproofing panel by bolting the steel layer without drilling holes on the acoustic layer; a thickness of the acoustic layer is 2 inches. The soundproofing panel can reduce noise of the device as well as block the slot on the wall from outside, which is recommended for cosmetic, noise-proofing and energy-efficiency reasons.
Preferably, the indoor unit is surrounded by a decoration frame, and the decoration frame covers the rigid connecting part.
The present invention also provides a method for installing an air conditioner, comprising steps of:

- 1) opening a slot on a wall; and
- 2) inserting and mounting the air conditioner into the slot;
- wherein the air conditioner comprises:
- an indoor unit;
- an outdoor unit; and
- a rigid connecting part which integrating the indoor unit and the outdoor unit;
- wherein the rigid connecting part has an indoor portion and an outdoor portion; the indoor unit is placed and mounted on the indoor portion of the rigid connecting part; and the outdoor unit is mounted to the outdoor portion of the rigid connecting part; the rigid connecting part comprises a fresh air vent for introducing fresh air, and a movable vent cover to control an opening size of the fresh air vent.

Preferably, the slot is configured to contain the indoor unit, so as to embed the indoor unit into the wall.
Preferably, the method further comprises a step of: mounting a limiting bar on the indoor unit; wherein the limiting bar is configured to contact the wall and prevent the indoor unit from be further inserted when the indoor unit is inserted into the slot by a certain distance.
Preferably, the outdoor unit is hung on the outdoor portion of the rigid connecting part.
Preferably, the method further comprises a step of: placing a rubber pad between the outdoor unit and the wall.
Preferably, the method further comprises a step of: mounting a rack on the wall for supporting the outdoor unit.
Preferably, the outdoor unit is placed on outdoor portion of the rigid connecting part, and is mounted to the rigid connecting part, and top portions of the indoor unit and the outdoor unit are connected by an additional connecting piece.
Preferably, the method further comprises a step of: mounting a rack on the wall for supporting the outdoor portion of the rigid connecting part.
Preferably, the method further comprises a step of: leaving a gap on a back of the outdoor unit for air intaking, wherein the gap is 2 inches.
Preferably, the method further comprises a step of: arranging a soundproofing panel on a back of the indoor unit; wherein the soundproofing panel comprises an acoustic layer and a steel layer; the steel layer is larger than the acoustic layer, and the soundproofing panel is mounted by bolting the steel layer on the wall without drilling holes on the acoustic layer; a thickness of the acoustic layer is 2 inches.
Preferably, the method further comprises a step of: surrounding the indoor unit by a decoration frame, wherein the decoration frame covers the slot and the rigid connecting part
With the foregoing structure and installation method, the air conditioner of the present invention has the advantages of conventional window-type air conditioners such as being simple to install, cost-saving, and easy to maintain, as well as has the advantages of conventional split-type air conditioners such as long service life, sleek-looking, and being quiet. As a result, the overall performance of the air conditioner will be improved. The present invention adopts the working principle of a split-type air conditioner, but can be used as a window-type air conditioner with sufficient energy-saving effect. Reasonable layout of the whole system and the additional sound insulation component make the air conditioner quieter. As long as the installation site allows, a user can select from the two structures to obtain better acoustic properties. The compact structure design allows the indoor unit and outdoor unit to be rigidly connected, and the air conditioner is still integrated, which is easy to replace and use. Installation thereof does not require specialized equipment and technicians, which saves a lot of time and installation costs for the user. The installation is convenient, and the maintenance is easy. The fresh air system can make up for the split-type and window-type air conditioners, which supply fresh air to closed environment in which the air conditioner is used, so as to enhance residential comfort and quality of life. Furthermore, compared with conventional installation method, the present invention keeps both the internal and external walls in a simplicity style, thus providing a cosmetic installing effect. In summary, the method of the present invention installs the indoor and outdoor units more properly and reasonably. When installed at a window, the air conditioner of the present can provide better visual effect than conventional window-type air conditioner.
These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart of a method for installing an air conditioner according to an embodiment 1 the present invention;

FIG. 2 is a sketch view of the air conditioner after applying the method for installing the air conditioner according to the embodiment 1 of the present invention;

FIG. 3 is a front view of a wall installed with the air conditioner according to the embodiment 1 of the present invention;

FIG. 4 is a back view of the wall installed with the air conditioner according to the embodiment 1 of the present invention;

FIG. 5 is a sketch view of the air conditioner after applying the method for installing the air conditioner according to an embodiment 2 of the present invention;

FIG. 6 is a sketch view of the air conditioner after applying the method for installing the air conditioner according to an embodiment 3 of the present invention;

FIG. 7 is a sketch view of the air conditioner after applying the method for installing the air conditioner according to an embodiment 4 of the present invention;

FIG. 8 is a sketch view of a soundproofing panel according to the present invention;

FIG. 9 is a front view of a wall installed with the air conditioner and a decoration frame according to the present invention; and

FIG. 10 is a perspective view of a rigid connecting part according to the present invention.

Element reference: 1—slot; 2—wall; 3—copper pipe; 4—rigid connecting part; 41—tunnel; 42—fresh air vent; 43—movable vent cover; 5—indoor unit; 51—limiting bar; 52—soundproofing panel; 521—acoustic layer; 522—steel layer; 53—decoration frame; 6—outdoor unit; 61—rubber pad; 62—rack; 63—gap; 64—additional connecting piece.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the accompanying drawings, an air conditioner of the present invention, as well as an installation method thereof, will be further illustrated.

Embodiment 1

Referring to FIGS. 1-4 , the embodiment 1 illustrates an air conditioner and a method for installing the same.
The air conditioner comprises:

- an indoor unit 5;
- an outdoor unit 6; and
- a rigid connecting part 4 which integrating the indoor unit 5 and the outdoor unit 6;
- wherein the rigid connecting part 4 has an indoor portion and an outdoor portion; the indoor unit 5 is placed and mounted on the indoor portion of the rigid connecting part 4; and the outdoor unit 6 is mounted to the outdoor portion of the rigid connecting part 4; referring to FIG. 10 , the rigid connecting part 4 comprises a fresh air vent 42 for introducing fresh air, and a movable vent cover 43 to control an opening size of the fresh air vent.

A limiting bar 51 is mounted on the indoor unit 5; the limiting bar 51 is configured to contact a wall 2 for positioning the indoor unit 5 during installation.
The outdoor unit 6 is hung on the outdoor portion of the rigid connecting part 4.
A rubber pad 61 is placed on a back of the outdoor unit 6.
A gap 63 is left on a back of the outdoor unit 6 for air intaking, and the gap 63 is 2 inches.
Referring to FIGS. 4 and 8 , soundproofing panel 52 is arranged on a back of the indoor unit 5; the soundproofing panel 52 comprises an acoustic layer 521 and a steel layer 522; the steel layer 522 is larger than the acoustic layer 521, so as to fix the soundproofing panel 52 by bolting the steel layer 22 without drilling holes on the acoustic layer 521; a thickness of the acoustic layer 521 is 2 inches.
Referring to the FIG. 1 , the method for installing the air conditioner comprises steps of:

- 1. opening a slot 1 on a wall 2;
- 2. inserting and mounting the air conditioner into the slot 1;
- 3. mounting a limiting bar 51 on the indoor unit 5;
- 4. placing a rubber pad 61 between the outdoor unit 6 and the wall 2;
- 5. leaving a gap 63 on a back of the outdoor unit 6 for air intaking; and
- 6. arranging a soundproofing panel 52 on a back of the indoor unit 5.

Embodiment 2

Referring to FIG. 5 , the embodiment 2 illustrates an air conditioner and a method for installing the same on a wall. Compared with the embodiment 1, the embodiment 2 adopts an additional supporting structure for the outdoor unit 6.
The air conditioner comprises:

A limiting bar 51 is mounted on the indoor unit 5; the limiting bar 51 is configured to contact a wall 2 for positioning the indoor unit 5 during installation.
The outdoor unit 6 is hung on the outdoor portion of the rigid connecting part 4.
Referring to FIGS. 5 and 8 , soundproofing panel 52 is arranged on a back of the indoor unit 5; the soundproofing panel 52 comprises an acoustic layer 521 and a steel layer 522; the steel layer 522 is larger than the acoustic layer 521, so as to fix the soundproofing panel 52 by bolting the steel layer 22 without drilling holes on the acoustic layer 521; a thickness of the acoustic layer 521 is 2 inches.
According to the embodiment 2, the method for installing the air conditioner comprises steps of:

- 1. opening a slot 1 on a wall 2;
- 2. inserting and mounting the air conditioner into the slot 1;
- 3. mounting a limiting bar 51 on the indoor unit 5;
- 4. mounting a rack 62 on the wall 2 for supporting the outdoor unit 6; and
- 5. arranging a soundproofing panel 52 on a back of the indoor unit 5.

The embodiment 2 is suitable for heavy outdoor units since the rack 62 can provide additional support for the outdoor unit 6.

Embodiment 3

Referring to FIG. 6 , the embodiment 3 illustrates an air conditioner and a method for installing the same on a wall, but the installing position of the outdoor unit is different.
The air conditioner comprises:

A limiting bar 51 is mounted on the indoor unit 5; the limiting bar 51 is configured to contact a wall 2 for positioning the indoor unit 5 during installation.
The outdoor unit 6 is placed and mounted on the outdoor portion of the rigid connecting part 4, and top portions of the indoor unit 5 and the outdoor unit 6 are connected by an additional connecting piece 64.
A gap 63 is left on a back of the outdoor unit 6 for air intaking, and the gap 63 is 2 inches.
Referring to FIGS. 6 and 8 , soundproofing panel 52 is arranged on a back of the indoor unit 5; the soundproofing panel 52 comprises an acoustic layer 521 and a steel layer 522; the steel layer 522 is larger than the acoustic layer 521, so as to fix the soundproofing panel 52 by bolting the steel layer 22 without drilling holes on the acoustic layer 521; a thickness of the acoustic layer 521 is 2 inches.
According to the embodiment 3, the method for installing the air conditioner comprises steps of:

- 1. opening a slot 1 on a wall 2;
- 2. inserting and mounting the air conditioner into the slot 1;
- 3. mounting a limiting bar 51 on the indoor unit 5;
- 4. mounting a rack 62 on the wall 2 for supporting the outdoor portion of the rigid connecting part 4;
- 5. leaving a gap 63 on a back of the outdoor unit 6 for air intaking; and
- 6. arranging a soundproofing panel 52 on a back of the indoor unit 5.

The air conditioner described in the embodiment 3 is more like a conventional window-type device, but with the advantages of split-type ones. If a light outdoor unit is used, the rack 62 can be omitted to enable a simplicity look.

Embodiment 4

Referring to FIG. 7 , the embodiment 4 illustrates an air conditioner and a method for installing the same in front of a window.
The air conditioner comprises:

The outdoor unit 6 is hung on the outdoor portion of the rigid connecting part 4.
A rubber pad 61 is placed on a back of the outdoor unit 6.
A gap 63 is left on a back of the outdoor unit 6 for air intaking, and the gap 63 is 2 inches.
According to the embodiment 4, the method for installing the air conditioner comprises steps of:

- 1. opening a slot 1 by opening a window;
- 2. inserting and mounting the air conditioner into the slot 1;
- 3. placing a rubber pad 61 between the outdoor unit 6 and the wall 2; and
- 4. leaving a gap 63 on a back of the outdoor unit 6 for air intaking.

Referring to FIG. 9 , when the split-type air conditioner is installed on a wall as described in embodiments 1-3, the indoor unit 5 may be surrounded by a decoration frame 53, and the decoration frame 53 is used to cover the slot 1 and the rigid connecting part 4.
In the above embodiments 1-4, a tunnel 41 may be drilled on the rigid connecting part 4. As shown in FIG. 10 , the copper pipe 3 is placed in the tunnel 41, so as to contain pipes and cables connected between the indoor unit 5 and the outdoor unit 6.
With the foregoing structure and installation method, the air conditioner of the present invention has the advantages of conventional window-type air conditioners such as being simple to install, cost-saving, and easy to maintain, as well as has the advantages of conventional split-type air conditioners such as long service life, sleek-looking, and being quiet. As a result, the overall performance of the air conditioner will be improved. Furthermore, compared with conventional installation method, the present invention keeps both the internal and external walls in a simplicity style, thus providing a cosmetic installing effect. In summary, the method of the present invention installs the indoor and outdoor units more properly and reasonably.
One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.
It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

Claims

What is claimed is:

1. An air conditioner, comprising:

an indoor unit (5);

an outdoor unit (6); and

a rigid connecting part (4) which integrating the indoor unit (5) and the outdoor unit (6);

wherein the rigid connecting part (4) has an indoor portion and an outdoor portion; the indoor unit (5) is placed and mounted on the indoor portion of the rigid connecting part (4); and the outdoor unit (6) is mounted to the outdoor portion of the rigid connecting part (4); the rigid connecting part (4) comprises a fresh air vent (42) for introducing fresh air, and a movable vent cover (43) to control an opening size of the fresh air vent.

2. The air conditioner, as recited in claim 1, wherein the rigid connecting part (4) has a tunnel (41), and a copper pipe (3) is placed in the tunnel (41), so as to contain pipes and cables connected between the indoor unit (5) and the outdoor unit (6).

3. The air conditioner, as recited in claim 1, wherein a limiting bar (51) is mounted on the indoor unit (5); the limiting bar (51) is configured to contact a wall (2) for positioning the indoor unit (5) during installation.

4. The air conditioner, as recited in claim 1, wherein the outdoor unit (6) is hung on the outdoor portion of the rigid connecting part (4).

5. The air conditioner, as recited in claim 4, wherein a rubber pad (61) is placed on a back of the outdoor unit (6).

6. The method, as recited in claim 1, wherein the outdoor unit (6) is placed and mounted on the outdoor portion of the rigid connecting part (4), and top portions of the indoor unit (5) and the outdoor unit (6) are connected by an additional connecting piece (64).

7. The method, as recited in claim 1, wherein a gap (63) is left on a back of the outdoor unit (6) for air intaking, and the gap (63) is 2 inches.

8. The method, as recited in claim 1, wherein a soundproofing panel (52) is arranged on a back of the indoor unit (5); the soundproofing panel (52) comprises an acoustic layer (521) and a steel layer (522); the steel layer (522) is larger than the acoustic layer (521), so as to fix the soundproofing panel (52) by bolting the steel layer (22) without drilling holes on the acoustic layer (521); a thickness of the acoustic layer (521) is 2 inches.

9. The method, as recited in claim 1, wherein the indoor unit (5) is surrounded by a decoration frame (53), and the decoration frame (53) covers the rigid connecting part (4).

10. A method for installing an air conditioner, comprising steps of:

1) opening a slot (1) on a wall (2); and

2) inserting and mounting the air conditioner into the slot (1);

wherein the air conditioner comprises:

an indoor unit (5);

an outdoor unit (6); and

11. The method, as recited in claim 10, wherein the slot (1) is configured to contain the indoor unit (5), so as to embed the indoor unit (5) into the wall (2).

12. The method, as recited in claim 11, further comprising a step of: mounting a limiting bar (51) on the indoor unit (5); wherein the limiting bar (51) is configured to contact the wall (2) and prevent the indoor unit (5) from be further inserted when the indoor unit (5) is inserted into the slot by a certain distance.

13. The method, as recited in claim 10, wherein the outdoor unit (6) is hung on the outdoor portion of the rigid connecting part (4).

14. The method, as recited in claim 13, further comprising a step of: placing a rubber pad (61) between the outdoor unit (6) and the wall (2).

15. The method, as recited in claim 13, further comprising a step of: mounting a rack (62) on the wall (2) for supporting the outdoor unit (6).

16. The method, as recited in claim 10, wherein the outdoor unit (6) is placed on outdoor portion of the rigid connecting part (4), and is mounted to the rigid connecting part (4), and top portions of the indoor unit (5) and the outdoor unit (6) are connected by an additional connecting piece (64).

17. The method, as recited in claim 16, further comprising a step of: mounting a rack (62) on the wall (2) for supporting the outdoor portion of the rigid connecting part (4).

18. The method, as recited in claim 10, further comprising a step of: leaving a gap (63) on a back of the outdoor unit (6) for air intaking, wherein the gap (63) is 2 inches.

19. The method, as recited in claim 10, further comprising a step of: arranging a soundproofing panel (52) on a back of the indoor unit (5); wherein the soundproofing panel (52) comprises an acoustic layer (521) and a steel layer (522); the steel layer (522) is larger than the acoustic layer (521), and the soundproofing panel (52) is mounted by bolting the steel layer (22) on the wall (2) without drilling holes on the acoustic layer (521); a thickness of the acoustic layer (521) is 2 inches.

20. The method, as recited in claim 10, further comprising a step of: surrounding the indoor unit (5) by a decoration frame (53), wherein the decoration frame (53) covers the slot (1) and the rigid connecting part (4).