Mobile air conditioner

Abstract

The utility model discloses a mobile air conditioner which comprises a whole machine shell, a refrigerating system and an air duct system. The refrigerating system comprises a first multi-face heat exchanger, a second multi-face heat exchanger and a compressor, and the compressor is connected with the first multi-face heat exchanger and the second multi-face heat exchanger through refrigerant pipelines. The air duct system comprises a first air duct assembly and a second air duct assembly; a second multi-surface heat exchanger and a compressor are mounted in an inner cavity of the lower part of the complete machine shell, and the compressor is arranged on the inner side of the second multi-surface heat exchanger; a second air duct assembly is installed in an inner cavity of the upper portion of the whole machine shell. A first multi-face heat exchanger and a first air duct assembly are installed on the top face of the second air duct assembly, and the first air duct assembly is arranged on the inner side of the first multi-face heat exchanger. According to the mobile air conditioner, the structural stability of the whole machine and the performance of the machine can be improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioners, and more specifically to a mobile air conditioner. Background Art

[0002] Mobile air conditioners have become a common choice for consumers to cool off in summer due to their small size, no need for installation, and can be placed at will. However, the existing mobile air conditioner air ducts and heat exchangers are generally stacked structures, which occupy more structural stacking space of the whole machine, increasing the development cost and reducing the structural stability of the whole machine. For example, Chinese patent number CN209639145U discloses a mobile air conditioner, including: a casing assembly, the interior of the casing assembly is longitudinally constructed with a lower accommodating chamber and an upper accommodating chamber that are isolated from each other; a first fan, and an adjacent first heat exchanger and a compressor are arranged in the lower accommodating chamber, a second fan and a second heat exchanger are arranged in the upper accommodating chamber, and a refrigerant circuit is constructed between the compressor and the first heat exchanger and the second heat exchanger, wherein the projection of the compressor on the horizontal plane is between the projection of the first heat exchanger on the horizontal plane and the projection of the second heat exchanger on the horizontal plane. In this prior art, the air duct and the heat exchange chamber are stacked up and down. This stacking method not only occupies a large space, but also makes the structural fixation of the machine more complicated, and its structural stability is limited. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a mobile air conditioner, which can improve the overall structural stability and machine performance.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A mobile air conditioner, comprising a whole housing, a refrigeration system and an air duct system;

[0006] The refrigeration system includes a first polyhedral heat exchanger, a second polyhedral heat exchanger and a compressor, wherein the compressor is connected to the first polyhedral heat exchanger and the second polyhedral heat exchanger respectively through a refrigerant pipeline;

[0007] The air duct system includes a first air duct component and a second air duct component;

[0008] A second polyhedral heat exchanger and a compressor are installed in the lower inner cavity of the whole machine housing, and the compressor is arranged inside the second polyhedral heat exchanger; a second air duct assembly is installed in the upper inner cavity of the whole machine housing;

[0009] The first polyhedral heat exchanger and the first polyhedral heat exchanger are installed on the top surface of the second polyhedral heat exchanger. The first polyhedral heat exchanger is arranged inside the first polyhedral heat exchanger.

[0010] The mobile air conditioner provided by this technical solution integrates the heat exchanger and the air duct system by stacking, so that the air duct components and the heat exchanger are stacked in a spatially overlapping manner, making the overall structure more compact and improving the structural stability of the overall machine; at the same time, the use of a multi-faceted heat exchanger allows the heat exchanger to have multiple air intakes and heat exchange, resulting in a larger heat exchange area and higher heat exchange efficiency, effectively improving the performance of the air conditioner. In addition, the mobile air conditioner adopts a dual-duct independent structure, which enables the air conditioner to control the operation of each duct separately, providing users with more functional options.

[0011] In a preferred technical solution, it also includes a circulating water system, which includes a water pumping component, a water sprinkling component and a water storage base; the compressor, the second polyhedral heat exchanger and the entire machine casing are installed on the water storage base in sequence from the inside to the outside; the water pumping component is arranged on the water storage base, and is used to pump the water in the water storage base into the gap of the second polyhedral heat exchanger; the water sprinkling component is arranged at the upper end of the second polyhedral heat exchanger, and is used to collect and divert the water pumped up by the water pumping component, so that the water flows back to the water storage base from the upper end of the second polyhedral heat exchanger.

[0012] In this technical solution, a circulating water system for heat exchange is added to the mobile air conditioner, which can perform water heat exchange on the second multi-faceted heat exchanger, greatly reducing the heat exhaust temperature of the air conditioner. Compared with traditional mobile air conditioners, it does not require an external air duct and can be applied to more scenarios.

[0013] In a preferred technical solution, the water storage base is provided with a water storage cavity with an open upper end along the circumference, for storing water for water cooling;

[0014] The water pumping assembly includes a motor and a water pumping wheel, and the water pumping wheel is connected to the shaft of the motor; the motor is arranged on the water storage base, the upper end of the water pumping wheel is arranged between the two heat exchange layers of the second polyhedral heat exchanger, and the lower end is located in the water storage cavity, and is used to pump water in the water storage cavity onto the second polyhedral heat exchanger;

[0015] The water sprinkling assembly includes a water distributor and an annular water sprinkling plate. The water distributor is arranged at the upper end of the second polyhedral heat exchanger corresponding to the water wheel. The water outlet of the water distributor is arranged above the annular water sprinkling plate. The annular water sprinkling plate is provided with a plurality of water sprinkling holes. Among them, the part that flies to the second polyhedral heat exchanger flows through the annular water sprinkling plate through the water distributor, flows down from the upper end of the second polyhedral heat exchanger through the water sprinkling holes, cools the part of the second polyhedral heat exchanger that is not located at the upper end of the water wheel, and finally flows back to the water storage base to realize water recycling.

[0016] In a preferred technical solution, the circulating water system also includes a water supply tank; the water supply tank is arranged on the water storage base and is located at the end facing the opening of the second polyhedral heat exchanger, and a water outlet connected to the water storage cavity is provided at the bottom of the water supply tank. The water supply tank is used to supply water to the water storage base, which is convenient for users to add water.

[0017] In a preferred technical solution, the centers of gravity of the compressor, the first air duct assembly and the second air duct assembly are all located on the central axis of the whole machine housing. Such an arrangement places the center of gravity of the air conditioner at the center of the whole machine, which can further optimize the balance of the whole machine.

[0018] In a preferred technical solution, the first air duct assembly includes a first housing, a first motor and a first wind wheel, wherein the first motor is coaxially connected to the first wind wheel; the first motor and the first wind wheel are arranged in the first housing in a horizontal direction, and a first air outlet is arranged on the top of the first housing. The inner wall of the first housing, the first motor and the first wind wheel together can form a larger air duct suction space, which is conducive to improving heat exchange efficiency.

[0019] In a preferred technical solution, the second air duct assembly includes a second housing, a second motor and a second wind wheel, the second motor is coaxially connected to the second wind wheel; the second motor and the second wind wheel are arranged in the second housing from top to bottom along the vertical direction, and a second air outlet is arranged on the circumferential side of the second housing. The inner wall of the second housing, the second motor and the second wind wheel together can form a larger air duct suction space, which is conducive to improving heat exchange efficiency.

[0020] In a preferred technical solution, the first polyhedral heat exchanger is a single-layer structure, which is easy to install and disassemble; the second polyhedral heat exchanger is a double-layer structure, which is more suitable for water cooling in a circulating water system to better reduce heat exhaust.

[0021] In a preferred technical solution, the horizontal cross-sections of the first polyhedral heat exchanger and the second polyhedral heat exchanger are both U-shaped, with a larger heat exchange area and a larger wind cavity, which helps to improve the energy efficiency of the air conditioner.

[0022] In a preferred technical solution, an air outlet grille is provided at a position corresponding to the second air outlet on the upper part of the whole housing; an air inlet grille is provided at a position corresponding to the second multi-faceted heat exchanger on the lower part of the whole housing. While ensuring normal air intake and air outlet of the air conditioner, it prevents larger foreign objects from entering the whole housing and damaging internal components.

[0023] Through the above technical solution, it can be seen that compared with the prior art, the beneficial effects of the present invention are as follows: the mobile air conditioner provided by the present invention stacks and integrates the heat exchanger and the air duct system, so that the air duct assembly and the heat exchanger are stacked in overlapping space, making the overall structure more compact and able to improve the structural stability of the overall machine; at the same time, a multi-faceted heat exchanger is used as the heat exchanger, so that the heat exchanger can take in air from multiple sides for heat exchange, with a larger heat exchange area and higher heat exchange efficiency, effectively improving the performance of the air conditioner; in addition, the use of a dual-duct independent structure allows the air conditioner to control the operation of each air duct separately, providing users with more functional options.

[0024] In addition, other advantages of the present invention will be given in the following description, and some will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the component structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the utility model;

[0028] Figure 3 It is a schematic diagram of the vertical cross-section structure of the utility model;

[0029] Figure 4 It is a schematic diagram of the overall structure of the utility model;

[0030] Explanation of the reference numerals: 1. machine casing; 11. air outlet grille; 12. air inlet grille; 21. first polyhedral heat exchanger; 22. second polyhedral heat exchanger; 23. compressor; 31. first air duct assembly; 311. first motor; 312. first wind wheel; 313. first air outlet; 32. second air duct assembly; 321. second motor; 322. second wind wheel; 41. water pumping assembly; 42. water replenishing tank; 43. water storage base; 100. first air cavity; 200. second air cavity. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] Reference Figure 1-4 A mobile air conditioner according to an embodiment of the utility model is described.

[0034] In one embodiment, Figure 1-4 As shown, a mobile air conditioner includes a whole machine housing 1, a refrigeration system and an air duct system. The refrigeration system includes a first polyhedral heat exchanger 21, a second polyhedral heat exchanger 22 and a compressor 23. The compressor 23 is connected to the first polyhedral heat exchanger 21 and the second polyhedral heat exchanger 22 through a refrigerant pipeline. When the air conditioner is working, the refrigerant runs through the first polyhedral heat exchanger 21 and the second polyhedral heat exchanger 22 through the pipeline under the action of the compressor 23, thereby achieving refrigeration and heat dissipation.

[0035] The air duct system includes a first air duct component 31 and a second air duct component 32. The first air duct component 31 and the second air duct component 32 are both composed of a housing, a motor and a wind wheel.

[0036] A second polyhedral heat exchanger 22 and a compressor 23 are installed in the lower inner cavity of the whole machine housing 1, and the compressor 23 is arranged on the inner side of the second polyhedral heat exchanger 22; a second air duct assembly 32 is installed in the upper inner cavity of the whole machine housing 1; the first polyhedral heat exchanger 21 and the first air duct assembly 31 are installed on the top surface of the second air duct assembly 32, and the first air duct assembly 31 is arranged on the inner side of the first polyhedral heat exchanger 21.

[0037] like Figure 2 As shown, Figure 2 The middle arrow indicates the air inlet direction of the air duct. The shell of the first air duct assembly 31 and the first polyhedral heat exchanger 21 together form a closed first air cavity 100, and the inner wall of the shell of the first air duct assembly 31 together with the motor and the wind wheel form a first air duct, so that the first polyhedral heat exchanger 21 can pass through the air to achieve heat exchange; the shell of the second air duct assembly 32 and the second polyhedral heat exchanger 22 together form a closed second air cavity 200, and the inner wall of the shell of the second air duct assembly 32 together with the motor and the wind wheel form a second air duct, so that the second polyhedral heat exchanger 22 can pass through the air to achieve heat exchange.

[0038] In specific implementation, since the first air duct is arranged inside the first polyhedral heat exchanger 21 and is installed overlapping with the first polyhedral heat exchanger 21 at the same horizontal position, the first air cavity 100 can have a higher structural stability; in addition, the first polyhedral heat exchanger 21 can pass air in multiple directions and angles, and the first air duct can absorb air from multiple sides, which not only increases the air passing area of ​​the heat exchanger, but also has a larger air duct suction space, thereby making the heat exchange efficiency of the first polyhedral heat exchanger 21 higher. At the same time, the second air duct is on the non-passing side above the second polyhedral heat exchanger 22, and the second polyhedral heat exchanger 22 can also pass air in multiple directions and angles. The second air duct can have a larger passing air cavity on its non-passing side, thereby improving the passing efficiency of the heat exchanger and achieving a better heat exchange effect.

[0039] The above embodiment stacks and integrates the heat exchanger and the air duct system, so that the air duct assembly and the heat exchanger are stacked in a spatially overlapping manner, making the structure of the whole machine more compact and improving the structural stability of the whole machine; at the same time, a multi-faceted heat exchanger is used, so that the heat exchanger can take in air from multiple sides for heat exchange, with a larger heat exchange area and higher heat exchange efficiency, effectively improving the performance of the air conditioner. In addition, several main components of the mobile air conditioner in this embodiment are integrable modular structures, making the whole machine easier to install and disassemble, and the fixing structure of the whole machine housing 1 can also be more stable and firm, thereby achieving better structural stability.

[0040] In the prior art, most mobile air conditioners on the market are of the external duct type, and the temperature of the hot air discharged by them is relatively high. Users often need to direct the hot air to the outside when using them. The external duct of the mobile air conditioner greatly limits the user's usage methods and scenarios, affecting the user experience.

[0041] In one embodiment, a circulating water system is also included, and the circulating water system includes a water pumping component 41, a water spraying component, a water replenishing tank 42 and a water storage base 43; the water storage base 43 is provided with a water storage cavity with an open upper end along the circumference;

[0042] The compressor 23, the second multi-faceted heat exchanger 22 and the whole machine housing 1 are installed on the water storage base 43 from the inside to the outside in sequence; Figure 3 As shown, Figure 3The middle arrow indicates the movement path of water. The water pumping assembly 41 is arranged on the water storage base 43, and is used to pump the water in the water storage base 43 into the gap of the second polyhedral heat exchanger 22; the water pumping assembly 41 includes a motor and a water pumping wheel, and the water pumping wheel is connected to the shaft of the motor; the motor is arranged on the water storage base 43, and the upper end of the water pumping wheel is arranged between the two heat exchange layers of the second polyhedral heat exchanger 22, and the lower end is located in the water storage cavity; the water sprinkling assembly is arranged on the upper end of the second polyhedral heat exchanger 22, and is used to collect and divert the water pumped by the water pumping assembly 41, so that the water flows back to the water storage base 43 from the upper end of the second polyhedral heat exchanger 22. The water sprinkling assembly includes a water distributor and an annular water sprinkling plate, and the water distributor is arranged at a position corresponding to the water pumping wheel at the upper end of the second polyhedral heat exchanger 22, and the water outlet of the water distributor is arranged above the annular water sprinkling plate, and a plurality of water sprinkling holes are arranged on the annular water sprinkling plate.

[0043] The water supply tank 42 is disposed on the water storage base 43 and is located at one end of the second polyhedral heat exchanger 22 . A water outlet connected to the water storage cavity is disposed at the bottom of the water supply tank 42 . The water supply tank 42 is used to supply water to the water storage base 43 .

[0044] In specific implementation, the water pumping component 41 is arranged in the second polyhedral heat exchanger 22. When the water pumping component 41 is working, the motor drives the water pumping wheel to splash water in the gap of the second polyhedral heat exchanger 22. Part of the water is diverted by the water divider to the annular water sprinkling plate. The water flows down from the upper end of the second polyhedral heat exchanger 22 through the water sprinkling holes, and finally flows back to the water storage base 43, realizing water recycling.

[0045] The mobile air conditioner in this embodiment has added a circulating water system for heat exchange, which can perform water heat exchange on the second multi-faceted heat exchanger 22, greatly reducing the heat exhaust temperature of the air conditioner. Compared with traditional mobile air conditioners, it does not require an external air duct and can be applied to more scenarios.

[0046] In the above embodiment, by adding a circulating water system and a multi-faceted heat exchanger, the mobile air conditioner has a larger air suction area and a larger air suction cavity, which can not only achieve a better cooling effect, but also significantly reduce the heat exhaust temperature.

[0047] In the above embodiment, the centers of gravity of the compressor 23, the first air duct assembly 31 and the second air duct assembly 32 are all located on the central axis of the whole machine housing 1. Such an arrangement makes the center of gravity of the air conditioner located at the center of the whole machine, which can further optimize the balance of the air conditioner.

[0048] In the above embodiment, the first air duct assembly 31 includes a first housing, a first motor 311 and a first wind wheel 312, wherein the first motor 311 is coaxially connected to the first wind wheel 312; the first motor 311 and the first wind wheel 312 are arranged in the first housing in a horizontal direction, and a first air outlet 313 is arranged on the top of the first housing. The first housing, the first motor 311 and the first wind wheel 312 together constitute the first air duct, which has a larger air duct suction space, and the first multi-faceted heat exchanger 21 can pass air in multiple directions and angles, and the first air duct can absorb air from multiple sides, which not only increases the air passing area of ​​the heat exchanger, but also makes the heat exchange efficiency of the first multi-faceted heat exchanger 21 higher, which is conducive to improving the heat exchange efficiency.

[0049] The second air duct assembly 32 includes a second housing, a second motor 321 and a second wind wheel 322. The second motor 321 is coaxially connected to the second wind wheel 322. The second motor 321 and the second wind wheel 322 are arranged in the second housing from top to bottom along the vertical direction, and a second air outlet is arranged on the circumferential side of the second housing. The inner wall of the second housing, the motor and the wind wheel form a second air duct. The second air duct is on the non-wind side above the second multi-faceted heat exchanger 22. The second multi-faceted heat exchanger 22 can also achieve multi-directional and multi-angle wind. The second air duct can have a larger wind cavity on its non-wind side, thereby improving the wind efficiency of the heat exchanger and achieving a better heat exchange effect.

[0050] In the above embodiment, the first polyhedral heat exchanger 21 is a single-layer structure, and the second polyhedral heat exchanger 22 is a double-layer structure. Furthermore, the horizontal cross-sections of the first polyhedral heat exchanger 21 and the second polyhedral heat exchanger 22 are both U-shaped, and the heat exchange area is larger.

[0051] In the above embodiment, an air outlet grille 11 is provided at the upper portion of the whole housing 1 corresponding to the second air outlet; an air inlet grille 12 is provided at the lower portion of the whole housing 1 corresponding to the second multi-faceted heat exchanger 22 .

[0052] The above embodiment can prevent larger foreign objects from entering the whole machine housing 1 and damaging internal components while ensuring normal air intake and air exhaust of the air conditioner by providing the air outlet grille 11 and the air inlet grille 12 .

[0053] Other structures and operations of the mobile air conditioner according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of this specification, the reference terms "embodiment", "specific embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0056] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined with each other in any one or more embodiments or examples in a suitable manner without interference or contradiction.

Claims

1. A mobile air conditioner, characterized in that: Including the whole machine housing, refrigeration system and air duct system; The refrigeration system comprises a first polyhedral heat exchanger, a second polyhedral heat exchanger and a compressor, wherein the compressor is connected to the first polyhedral heat exchanger and the second polyhedral heat exchanger respectively through a refrigerant pipeline; The air duct system includes a first air duct component and a second air duct component; The second polyhedral heat exchanger and the compressor are installed in the lower inner cavity of the whole machine housing, and the compressor is arranged inside the second polyhedral heat exchanger; the second air duct assembly is installed in the upper inner cavity of the whole machine housing; The first polyhedral heat exchanger and the first polyhedral heat exchanger are installed on the top surface of the second polyhedral heat exchanger, and the first polyhedral heat exchanger is arranged inside the first polyhedral heat exchanger.

2. A mobile air conditioner according to claim 1, characterized in that: It also includes a circulating water system, which includes a water pumping component, a water sprinkling component and a water storage base; The compressor, the second multi-faceted heat exchanger and the whole machine housing are sequentially installed on the water storage base from inside to outside; The water pumping assembly is arranged on the water storage base, and is used to pump the water in the water storage base into the gap of the second multi-faceted heat exchanger; The water sprinkling assembly is disposed at the upper end of the second polyhedral heat exchanger, and is used to collect and divert the water pumped up by the water pumping assembly, so that the water flows back from the upper end of the second polyhedral heat exchanger to the water storage base.

3. A mobile air conditioner according to claim 2, characterized in that: The water storage base is provided with a water storage cavity with an open upper end along the circumference; The water pumping assembly includes a motor and a water pumping wheel, wherein the water pumping wheel is connected to the shaft of the motor; the motor is arranged on the water storage base, the upper end of the water pumping wheel is arranged between the two heat exchange layers of the second polyhedral heat exchanger, and the lower end is located in the water storage cavity; The water sprinkling assembly includes a water distributor and an annular water sprinkling plate. The water distributor is arranged at a position corresponding to the water wheel at the upper end of the second multi-faceted heat exchanger. The water outlet of the water distributor is arranged above the annular water sprinkling plate. The annular water sprinkling plate is provided with a plurality of water sprinkling holes.

4. A mobile air conditioner according to claim 3, characterized in that: The circulating water system also includes a water supply tank; the water supply tank is arranged on the water storage base and is located at one end of the second polyhedral heat exchanger opening, and a water outlet connected to the water storage cavity is arranged at the bottom of the water supply tank.

5. A mobile air conditioner according to claim 1, characterized in that: The centers of gravity of the compressor, the first air duct assembly, and the second air duct assembly are all located on the central axis of the entire machine housing.

6. A mobile air conditioner according to claim 1, characterized in that: The first air duct assembly includes a first shell, a first motor and a first wind wheel, wherein the first motor is coaxially driven and connected to the first wind wheel; the first motor and the first wind wheel are arranged in the first shell in a horizontal direction, and a first air outlet is provided on the top of the first shell.

7. A mobile air conditioner according to claim 6, characterized in that: The second air duct assembly includes a second shell, a second motor and a second wind wheel, wherein the second motor is coaxially driven and connected to the second wind wheel; the second motor and the second wind wheel are arranged in the second shell from top to bottom along the vertical direction, and a second air outlet is provided on the circumferential side of the second shell.

8. The mobile air conditioner according to claim 1, characterized in that: The first polyhedral heat exchanger is a single-layer structure, and the second polyhedral heat exchanger is a double-layer structure.

9. The mobile air conditioner according to claim 1, characterized in that: The horizontal cross-sections of the first polyhedral heat exchanger and the second polyhedral heat exchanger are both U-shaped.

10. A mobile air conditioner according to claim 7, characterized in that: An air outlet grille is provided at a position on the upper portion of the whole machine housing corresponding to the second air outlet; an air inlet grille is provided at a position on the lower portion of the whole machine housing corresponding to the second multi-faceted heat exchanger.

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