Window air conditioner

Abstract

The present invention discloses a window air conditioner, comprising a chassis and a fresh air device. The fresh air device is mounted on the chassis and is used to deliver fresh air to the room. The fresh air device includes a fresh air housing extending from the outside to the inside. The fresh air housing is provided with a fresh air inlet connected to the outside, a fresh air outlet connected to the room, and a fresh air duct connecting the fresh air inlet and the fresh air outlet. The fresh air housing has an air inlet section adjacent to the fresh air inlet, an air outlet section adjacent to the fresh air outlet, and a transition section between the air inlet section and the air outlet section. The maximum ventilation area of ​​the transition section is greater than the maximum ventilation area of ​​the air inlet section and the air outlet section, so that the minimum flow velocity of the air flow in the transition section is less than the flow velocity at both ends of the transition section. In the window air conditioner provided by the present invention, after the outdoor air enters the air inlet section, it flows through the transition section with a larger ventilation area, thereby reducing the overall wind speed in the fresh air duct, reducing the wind resistance within the entire fresh air duct, reducing air volume loss, and reducing noise.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, in particular to a window type air conditioner. Background Art

[0002] In today's life, people have more and more requirements for fresh air. PTAC (Packaged Terminal Air Conditioner) window units are the most commonly used cooling systems in mid- to high-end hotels in the US market and are also in strong demand. To this end, a fresh air duct connecting indoor and outdoor can be set up in the window air conditioner to meet people's ventilation needs when using the window air conditioner. However, the window air conditioner itself is relatively small in size, and corresponding heat exchange ducts and air inlets and outlets need to be set up on both the indoor and outdoor sides of the air conditioner, which limits the space available for fresh air inlets and outlets on the front and rear sides of the air conditioner. As a result, the fresh air inlet and fresh air outlet areas of the fresh air duct are usually small. On this basis, in order to meet the air volume demand for fresh air ventilation, it may be necessary to provide a higher wind speed, which will result in greater wind resistance in the fresh air duct, large air volume loss, and easy noise generation.

[0003] The above content is only used to assist in understanding the technical solution of the invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to provide a window air conditioner, aiming to solve one or more of the above-mentioned technical problems.

[0005] To achieve the above object, the window air conditioner proposed by the present invention includes:

[0006] chassis;

[0007] A fresh air device is installed on the chassis and is used to deliver fresh air into the room. The fresh air device includes a fresh air shell extending from the outdoors to the indoors. The fresh air shell is provided with a fresh air inlet connected to the outdoors, a fresh air outlet connected to the indoors, and a fresh air duct connecting the fresh air inlet and the fresh air outlet. The fresh air shell has an air inlet section adjacent to the fresh air inlet, an air outlet section adjacent to the fresh air outlet, and a transition section provided between the air inlet section and the air outlet section. The maximum ventilation area of ​​the transition section is greater than the maximum ventilation area of ​​the air inlet section and the air outlet section, so that the minimum flow velocity of the airflow in the transition section is less than the flow velocity at both ends of the transition section.

[0008] In one embodiment, the ratio of the maximum ventilation area S of the transition section to the maximum ventilation area S1 of the air inlet section is greater than 1.4 and less than 1.6; and / or,

[0009] The ratio of the maximum ventilation area S of the transition section to the maximum ventilation area S2 of the air outlet section is greater than 3.5 and less than 4.

[0010] In one embodiment, the transition section includes a connected expansion area and a boost area, the expansion area is connected to the air inlet section, and the boost area is connected to the air outlet section. The expansion area is gradually expanded from the air inlet section to the boost area, and the boost area is gradually contracted from the expansion area to the air outlet section.

[0011] In one embodiment, the chassis has a first edge and a second edge extending in the front-to-back direction, the distance that the cross-section of the fresh air duct extends along the first edge toward the second edge is the cross-sectional width, the cross-sectional height of the air inlet section is greater than that of the air outlet section, the cross-sectional width of the air outlet section is greater than that of the air inlet section, the cross-sectional height of the transition section is at least partially gradually reduced from the air inlet section to the air outlet section, and the cross-sectional width of the transition section is at least partially gradually increased from the air inlet section to the air outlet section.

[0012] In one embodiment, the cross-sectional height of the air inlet section is H1, the cross-sectional height of the air outlet section is H2, and the ratio of H1 to H2 is greater than 4.1 and less than 5.1; and / or,

[0013] The cross-sectional width of the air inlet section is L1, the cross-sectional width of the air outlet section is L2, and the ratio of L1 to L2 is greater than 0.48 and less than 0.58.

[0014] In one embodiment, the top wall of the transition section is at least partially configured as an outwardly convex arc surface.

[0015] In one embodiment, the bending radius R of the top wall in the transition section is greater than 160 mm and less than 200 mm.

[0016] In one embodiment, a ratio of an extension length D2 of the transition section in the air supply direction of the fresh air duct to an extension length D1 of the air inlet section in the air supply direction is greater than 1.4 and less than 1.6.

[0017] In one embodiment, the fresh air shell includes multiple pieces, and the multiple fresh air shells are spliced ​​together to form the fresh air duct. The splicing surface between two adjacent fresh air shells forms a splicing line on the outer wall surface of the fresh air shell, and the splicing line extends along the air supply direction of the fresh air duct.

[0018] In one embodiment, the splicing line is bent along the air supply direction.

[0019] In one embodiment, two adjacent fresh air shells have a first splicing surface and a second splicing surface that are spliced ​​together, the first splicing surface is provided with a boss, and the second splicing surface is provided with a groove that is adapted to the boss, the boss and the groove both extend along the air supply direction, and the boss is correspondingly embedded in the groove.

[0020] In one embodiment, a sealing device is provided between the joint surfaces of two adjacent fresh air casings.

[0021] In one embodiment, the plurality of fresh air shells include an upper fresh air shell and a lower fresh air shell, and the upper fresh air shell and the lower fresh air shell are stacked in an upper and lower direction.

[0022] In one embodiment, a connecting structure is respectively provided on the side walls of the upper fresh air shell and the lower fresh air shell protruding outward, so that the upper fresh air shell and the lower fresh air shell are connected and fixed by the connecting structure.

[0023] In one embodiment, the connecting structure includes a screw-on mounting portion and a snap-on mounting portion, and the screw-on mounting portion and the snap-on mounting portion are arranged on both sides of the fresh air shell in the air supply direction. The screw-on mounting portion includes an upper mounting plate and a lower mounting plate respectively arranged on the upper fresh air shell and the lower fresh air shell, and the upper mounting plate is screwed to the lower mounting plate. The snap-on mounting portion includes a clamping block and a buckle respectively arranged on the upper fresh air shell and the lower fresh air shell, and the clamping block and the buckle are snap-connected.

[0024] In one embodiment, the fresh air device further includes a fresh air blower, and the fresh air blower is disposed at the fresh air inlet.

[0025] In one embodiment, the window air conditioner further includes an indoor air duct shell and an indoor heat exchanger, wherein the indoor air duct shell is mounted on the front side of the chassis, an indoor air duct is formed in the indoor air duct shell, the indoor heat exchanger is mounted on the chassis and is arranged corresponding to the air inlet end of the indoor air duct, the end of the air outlet section forms the fresh air outlet, and the fresh air outlet is arranged adjacent to the windward surface of the indoor heat exchanger.

[0026] In one embodiment, the air outlet section of the fresh air housing is at least partially located between the lower end of the indoor air duct housing and the bottom plate.

[0027] In one embodiment, the window air conditioner further comprises a shell mounted on the chassis, the indoor air duct shell and the indoor heat exchanger are located in the shell, and the front wall of the shell is provided with an indoor air inlet;

[0028] The end of the air outlet section is located outside the front wall of the shell, and the fresh air outlet is arranged adjacent to the indoor air inlet; or,

[0029] The indoor heat exchanger is spaced apart from the front wall of the shell, the end of the air outlet section is located between the indoor heat exchanger and the front wall of the shell, and the fresh air outlet is connected to the indoor air duct.

[0030] In one embodiment, the opening of the fresh air outlet is arranged upward; or,

[0031] The opening of the fresh air outlet is arranged to face forward.

[0032] In one embodiment, the window air conditioner also includes a shell installed on the chassis, the indoor air duct shell and the indoor heat exchanger are located in the shell, the front wall of the shell is provided with an indoor air inlet, and the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger arranged corresponding to the indoor air inlet. The window air conditioner has a constant temperature dehumidification mode. In the constant temperature dehumidification mode, one of the first indoor heat exchanger and the second indoor heat exchanger is in heating mode, and the other is in cooling mode.

[0033] In one embodiment, the first indoor heat exchanger and the second indoor heat exchanger are stacked along the air inlet direction of the indoor air duct; or

[0034] The first indoor heat exchanger and the second indoor heat exchanger are arranged side by side in a direction perpendicular to the air inlet direction of the indoor air duct, so that part of the airflow entering from the indoor air inlet blows toward the first indoor heat exchanger and the other part blows toward the second indoor heat exchanger.

[0035] In one embodiment, the window air conditioner further includes an outdoor heat exchanger, a refrigerant circulation pipeline, a first valve, and a second valve;

[0036] The refrigerant outlet of the compressor of the window air conditioner is provided with a discharge pipe, and the refrigerant inlet is provided with a suction pipe;

[0037] The discharge pipe, the outdoor heat exchanger, the first indoor heat exchanger, the second indoor heat exchanger, and the suction pipe are connected in sequence through the refrigerant circulation pipeline;

[0038] The first valve is connected in series to the refrigerant circulation pipeline between the outdoor heat exchanger and the first indoor heat exchanger, and the second valve is connected in series to the refrigerant circulation pipeline between the first indoor heat exchanger and the second indoor heat exchanger.

[0039] In one embodiment, the refrigerant circulation pipeline includes a first pipe connecting the discharge pipe and the outdoor heat exchanger, and a second pipe connecting the suction pipe and the second indoor heat exchanger; the window air conditioner further includes a switching device;

[0040] The switching device is connected in series to the first pipe and the second pipe, and the switching device has a first switching state and a second switching state;

[0041] In the first switching state, the first pipe connected to both ends of the switching device is conductive, and the second pipe connected to both ends of the switching device is conductive;

[0042] In the second switching state, the first pipe between the discharge pipe and the switching device is connected to the second pipe between the switching device and the second indoor heat exchanger, and the first pipe between the outdoor heat exchanger and the switching device is connected to the second pipe between the suction pipe and the switching device.

[0043] In one embodiment, the window air conditioner further comprises a controller, wherein the controller is electrically connected to the switching device, the first valve, and the second valve;

[0044] When the window air conditioner is in a constant temperature dehumidification mode, the controller is used to control the switching device to be in a first switching state, and to control the first valve to be fully opened and the second valve to be partially opened; and / or,

[0045] The window air conditioner further has a full cooling mode. When the window air conditioner is in the full cooling mode, the controller is used to control the switching device to be in a first switching state, and to control the first valve to be partially opened and the second valve to be fully opened; and / or,

[0046] The window air conditioner also has a full heating mode. When the window air conditioner is in the full heating mode, the controller is used to control the switching device to be in a second switching state, and to control the second valve to be fully opened and the first valve to be partially opened.

[0047] The window air conditioner provided by the present invention includes a chassis and a fresh air device. The fresh air device includes a fresh air housing extending from the outdoors to the indoors. The fresh air housing is provided with a fresh air inlet connected to the outdoors, a fresh air outlet connected to the indoors, and a fresh air duct connecting the fresh air inlet and the fresh air outlet. The fresh air housing includes an air inlet section adjacent to the fresh air inlet, an air outlet section adjacent to the fresh air outlet, and a transition section disposed between the air inlet and the air outlet sections. The maximum ventilation area of ​​the transition section is greater than the maximum ventilation areas of the air inlet and the air outlet sections, so that the minimum flow velocity of the airflow in the transition section is less than the flow velocity at both ends of the transition section. In the window air conditioner provided by the present invention, after outdoor air enters the air inlet section, it flows through the transition section with a larger ventilation area, thereby reducing the overall wind speed in the fresh air duct and the wind resistance within the entire fresh air duct, thereby reducing air volume loss and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0049] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a window air conditioner of the present invention;

[0050] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of a window-type air conditioner, wherein the housing is removed;

[0051] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure of a window-type air conditioner from another angle;

[0052] Figure 4 for Figure 2 Schematic diagram of the top view of the middle window air conditioner after it is straightened;

[0053] Figure 5 for Figure 2 Schematic diagram of the structure of a window air conditioner from the left;

[0054] Figure 6 for Figure 2 Schematic diagram of the assembly structure of the chassis, fresh air device and part of the indoor air duct shell of the window air conditioner;

[0055] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure of a window-type air conditioner from another angle;

[0056] Figure 8 for Figure 2 Schematic diagram of the three-dimensional structure of the fresh air device of the window air conditioner;

[0057] Figure 9 for Figure 8 Schematic diagram of the three-dimensional structure of the fresh air device from another angle;

[0058] Figure 10 for Figure 8 Left view of the fresh air device;

[0059] Figure 11 for Figure 8 Top view of the fresh air device;

[0060] Figure 12 for Figure 10 Cross-sectional view of the fresh air device;

[0061] Figure 13 for Figure 8 A cross-sectional view of the fresh air device;

[0062] Figure 14 for Figure 13 A magnified schematic diagram of point A in the middle;

[0063] Figure 15 for Figure 8 Schematic diagram of the three-dimensional structure of the fresh air device;

[0064] Figure 16 for Figure 8 Schematic diagram of the exploded three-dimensional structure of the central fresh air device from another angle;

[0065] Figure 17 for Figure 16 A magnified schematic diagram of point B in the middle;

[0066] Figure 18 Schematic diagram of the structure of another embodiment of the window air conditioner of the present invention;

[0067] Figure 19 This is a structural diagram of another embodiment of a window air conditioner of the present invention.

[0068] Description of Figure Numbers:

[0069]

[0070]

[0071] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0072] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0073] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0074] The present invention provides a window type air conditioner.

[0075] In the embodiment of the present invention, Figures 1 to 7 As shown, the window air conditioner includes a chassis 100 and a fresh air device 400. The fresh air device 400 is installed on the chassis 100 and is used to transport fresh air into the room. The fresh air device 400 includes a fresh air shell 410 extending from the outdoors to the indoors. The fresh air shell 410 is provided with a fresh air inlet 411 connected to the outdoors, a fresh air outlet 412 connected to the indoors, and a fresh air duct 413 connecting the fresh air inlet 411 and the fresh air outlet 412. The fresh air shell 410 has an air inlet section 415 adjacent to the fresh air inlet 411, an air outlet section 414 adjacent to the fresh air outlet 412, and a transition section 416 provided between the air inlet section 415 and the air outlet section 414. The maximum ventilation area of ​​the transition section 416 is greater than the maximum ventilation area of ​​the air inlet section 415 and the air outlet section 414, so that the minimum flow rate of the air flow in the transition section 416 is less than the flow rate at both ends of the transition section 416.

[0076] The chassis 100 provides mounting and support for the window air conditioner's internal structure. The window air conditioner also includes a housing 500, which is mounted to the chassis 100, forming the outer frame of the entire window air conditioner's indoor unit. All components of the window air conditioner are housed within the space formed by the housing 500 and chassis 100. The shape of the housing 500 can be square, cylindrical, or similar, depending on specific usage requirements and is not specifically limited here. Typically, for ease of manufacturing and molding, the housing 500 is generally square. The housing 500 houses an indoor air duct housing 200 and an outdoor air duct housing. The indoor air duct housing 200 is mounted to the front of the chassis 100, and an indoor air duct 210 is formed within the indoor air duct housing 200. The indoor heat exchanger 300 is mounted to the chassis 100 and positioned corresponding to the air inlet end of the indoor air duct 210. The indoor heat exchanger 300 can be installed inside the indoor air duct housing 200 or outside the indoor air duct housing 200 at the air inlet end of the indoor air duct 210. The airflow exiting the indoor air duct 210 must be heat-exchanged by the indoor heat exchanger 300. The outdoor air duct housing is located on the rear side of the chassis 100. It contains an outdoor air duct. The outdoor air duct is equipped with an outdoor fan and an outdoor heat exchanger 700, which drive outdoor air into the outdoor air duct to dissipate heat for the outdoor heat exchanger 700. The rear wall of the housing 500 is provided with an outdoor air inlet and a fresh air outlet, which are connected to the fresh air inlet 411.

[0077] The housing 500 is provided with an indoor air inlet 510 and an indoor air outlet. The air inlet end of the indoor air duct 210 is connected to the indoor air inlet 510, and the air outlet end of the indoor air duct 210 is connected to the indoor air outlet. The indoor air inlet 510 and the indoor air outlet can both be provided on the front side wall of the housing 500. Alternatively, the indoor air inlet 510 can be located on the front side wall of the housing 500, and the indoor air outlet can be located on the top surface of the housing 500. The indoor air outlet can also be located at the junction of the front side wall and the top surface of the housing 500. An indoor fan can also be provided in the indoor air duct 210. The indoor fan can be a centrifugal fan or a cross-flow fan. The indoor fan introduces fresh air and indoor airflow from the indoor air inlet 510, exchanges heat in the indoor heat exchanger 300, flows through the indoor air duct 210, and is blown out from the indoor air outlet.

[0078] In this embodiment, the fresh air inlet 411 and the fresh air outlet 412 can be rectangular, circular, elongated, or elliptical, or can be formed with multiple micropores, without specific limitation. The fresh air device 400 can also include a fresh air blower for directing airflow from the fresh air inlet 411 to the fresh air outlet 412. In one embodiment, the fresh air blower is located at the fresh air inlet 411. The fresh air blower can be an axial flow impeller, a crossflow impeller, or a centrifugal impeller, as long as it can promote airflow from the fresh air inlet 411 to the fresh air outlet 412, thereby ensuring the air supply volume of the fresh air device 400. In other embodiments, the fresh air inlet 411 can be connected to the outdoor air duct, and the outdoor blower can be used to blow the outdoor air into the fresh air duct 413 and out of the fresh air outlet 412. It is understood that the fresh air housing 410 extends from the outside to the inside, that is, the fresh air housing 410 extends from one side of the outdoor air duct housing to the side of the indoor air duct housing 200. In this way, the fresh air inlet 411 of the fresh air housing 410 located on the side of the outdoor air duct housing is connected to the outside, and the fresh air outlet 412 located on the side of the indoor air duct housing 200 is connected to the indoor room, and the outdoor air flow is directly introduced into the indoor room through the independent fresh air duct 413. It should be noted that the fresh air outlet 412 is connected to the indoor room, which means that the air flow blown out from the fresh air outlet is blown directly into the indoor room, rather than blowing into the indoor side air duct 210 and then blowing into the indoor room indirectly through the indoor side air duct 210.

[0079] Those skilled in the art are well aware that window-type air conditioners are relatively small, with limited space within the housing 500. Furthermore, the indoor and outdoor sides of the air conditioner require corresponding indoor structures such as the indoor air duct 210, indoor heat exchanger, and indoor impeller, as well as outdoor structures such as the outdoor air duct, outdoor heat exchanger, and outdoor impeller. Consequently, the space available for the fresh air inlet 411 and fresh air outlet 412 on the front and rear sides of the air conditioner is limited, resulting in a generally small area for the fresh air inlet 411 and fresh air outlet 412 of the fresh air duct 413. Furthermore, to meet the air volume requirements for fresh air ventilation and ensure a high air volume, a high air velocity is generally required. However, excessively high air velocity results in high frictional resistance within the fresh air duct 413, resulting in significant air volume loss and the generation of noise.

[0080] Therefore, to ensure the ventilation volume of the fresh air device 400, the fresh air housing 410 in this embodiment has a transition section 416. The maximum ventilation area of ​​the transition section 416 is larger than the maximum ventilation areas of the air inlet section 415 and the air outlet section 414. This ensures that the minimum air velocity in the transition section 416 is lower than the velocity at both ends of the transition section 416. Thus, outdoor air enters the air inlet section 415 through the fresh air inlet 411 at a higher velocity. It then flows into the transition section 416. Due to the larger ventilation area of ​​the transition section 416, the air velocity decreases in the transition section 416. The air then enters the air outlet section 414 and finally flows out of the fresh air outlet 412. In this embodiment, the provision of the transition section 416 in the fresh air housing 410 utilizes the space between the indoor air duct 210 and the outdoor air duct of the window air conditioner, partially increasing the airflow area of ​​the fresh air duct 413 and reducing the overall air velocity in the fresh air duct 413. Those skilled in the art understand that the frictional wind resistance in the air duct is proportional to the wind speed. By reducing the overall wind speed in the air duct, the wind resistance in the entire fresh air duct 413 can be reduced, thereby reducing air volume loss and reducing noise.

[0081] On the basis of the previous embodiment, there is a certain ratio between the maximum ventilation area of ​​the transition section 416 and the maximum ventilation areas of the air inlet section 415 and the air outlet section 414. When the maximum ventilation area of ​​the transition section 416 is too large, the wind speed may be too low, and the ventilation volume of the fresh air duct 413 cannot be guaranteed. If the maximum ventilation area of ​​the transition section 416 is too small, it cannot play the role of reducing wind speed, wind resistance and noise. When the ratio of the maximum ventilation area S of the transition section 416 of the ventilation volume to the maximum ventilation area S1 of the air inlet section 415 is greater than 1.4 and less than 1.6, and / or the ratio of the maximum ventilation area S of the transition section 416 to the maximum ventilation area S2 of the air outlet section 414 is greater than 3.5 and less than 4, the ventilation volume is large, the noise is small, and the ventilation effect is good.

[0082] In one embodiment, see Figures 8 to 11The transition section 416 includes a flared area 416a and a pressurized area 416b. The flared area 416a is connected to the air inlet section 415, and the pressurized area 416b is connected to the air outlet section 414. The flared area 416a gradually expands from the air inlet section 415 to the pressurized area 416b, while the pressurized area 416b gradually contracts from the flared area 416a to the air outlet section 414. In this embodiment, the flared area 416a of the transition section 416 gradually expands from the air inlet section 415 to the pressurized area 416b. Therefore, when air flows from the air inlet section 415 into the transition section 416, it can expand through the flared area 416a, thereby effectively reducing noise. The pressurized area 416b connects the expansion area 416a and the air outlet section 414. Therefore, by setting the pressurized area 416b, the airflow flowing from the expansion area 416a into the air outlet section 414 can be buffered in the pressurized area 416b, and after being guided by the pressurized area 416b, the airflow is driven to flow toward the fresh air outlet 412, making the airflow flow smoother, reducing wind resistance and wind loss, and avoiding noise caused by the sudden drop in size.

[0083] Those skilled in the art will understand that the air inlet section 415 and the air outlet section 414 of the fresh air duct 413 are preferably arranged relative to each other in the front-to-back direction, and the closer the shape and size are, the better. This can reduce the cross-sectional variation of the fresh air duct 413 and reduce wind loss. However, due to the arrangement of the indoor and outdoor structures of the window air conditioner housing 500, the positions where the air inlet section 415 and the air outlet section 414 can be arranged are limited, and it is usually impossible to ensure that the shapes and sizes of the two are consistent. The air inlet section 415 is arranged on the outdoor side where the space is relatively ample, while the air outlet section 414 is arranged on the indoor side where the space is relatively narrow. Generally speaking, the air flow area of ​​the air inlet section 415 is larger than that of the air outlet section 414. In order to avoid the indoor and outdoor structures of the window air conditioner, in this embodiment, please refer to Figures 8 to 11 The cross-sectional height of the air inlet section 415 is greater than the cross-sectional height of the air outlet section 414, and the cross-sectional width of the air outlet section 414 is greater than the cross-sectional width of the air inlet section 415. In this embodiment, the cross-sectional area of ​​the fresh air duct 413 refers to the cross-sectional area of ​​the fresh air duct 413 perpendicular to the air supply direction, and the cross-sectional height refers to the net dimension of the inner wall of the fresh air duct 413 perpendicular to the chassis 100. Furthermore, the chassis 100 has a first edge 101 and a second edge 102 extending in the front-to-back direction. The cross-sectional width refers to the distance along the cross-sectional area of ​​the fresh air duct 413 extending from the first edge 101 to the second edge 102, and is also the net dimension between the inner wall surfaces of the fresh air duct 413.

[0084] In one embodiment, please refer to Figures 8 to 12The cross-sectional height of the transition section 416 is at least partially gradually reduced from the air inlet section 415 to the air outlet section 414, and the cross-sectional width of the transition section 416 is at least partially gradually increased from the air inlet section 415 to the air outlet section 414. In this way, the transition section 416 not only plays the role of locally increasing the wind flow area, reducing the wind speed, and increasing the air volume. It can also connect the air inlet section 415 and the air outlet section 414 with different shapes and sizes in a gradual manner, so that the cross-sectional area of ​​the entire fresh air duct 413 gradually changes along the air supply direction, avoiding local wind resistance caused by sudden changes in size, making the air flow smoother, and reducing wind loss and noise.

[0085] Those skilled in the art will appreciate that the cross-sectional dimensions of the fresh air housing 410 within the air inlet section 415 and the air outlet section 414 are generally substantially constant along the air supply direction, but may also vary locally as needed. In this embodiment, the cross-sectional height and cross-sectional width of the air inlet section 415 and the air outlet section 414 refer to the cross-sectional dimensions of the end of the air inlet section 415 and the air outlet section 414 adjacent to the transition section 416. When the cross-sectional dimensions are rectangular, the cross-sectional height and cross-sectional width are the corresponding dimensions of each side of the rectangle. When the cross-sectional dimensions are irregular, the cross-sectional height and cross-sectional width refer to the maximum clear dimension of the air duct cross-sectional dimensions in the direction perpendicular to the chassis 100, and the cross-sectional width refers to the maximum clear dimension of the air duct cross-sectional dimensions in the direction from the first edge 101 to the second edge 102 of the chassis 100.

[0086] On the basis of the previous embodiment, the larger the difference in cross-sectional dimensions between the air inlet section 415 and the air outlet section 414, the more detrimental the air supply effect is, while if the difference in cross-sectional dimensions is too small, it is impossible to avoid the indoor and outdoor structures inside the window air conditioner. Figure 12 The cross-sectional height of the air inlet section 415 is H1, the cross-sectional height of the air outlet section 414 is H2, and the ratio between H1 and H2 is greater than 4.1 and less than 5.1; and / or the cross-sectional width of the air inlet section 415 is L1, the cross-sectional width of the air outlet section 414 is L2, and the ratio between L1 and L2 is greater than 0.48 and less than 0.58. This effectively avoids the internal structure of the window air conditioner and simultaneously makes the areas of the fresh air inlet 411 and the fresh air outlet 412 relatively close, thereby ensuring the ventilation volume of the fresh air duct 413.

[0087] Specifically, the top wall 421 of the transition section 416 is at least partially configured as an outwardly convex curved surface. Preferably, the curvature radius R of the top wall 421 within the transition section 416 is greater than 160 mm and less than 200 mm. This guides airflow along the curved surface, resulting in smoother flow, less wind resistance and loss, and reduced noise. Furthermore, the curved top surface can fully conform to the indoor air duct housing 200 outside the fresh air duct 413, effectively utilizing the air conditioner's internal space and providing a more secure fit.

[0088] Those skilled in the art understand that when air enters the fresh air duct 413 from the fresh air inlet 411, it needs to be guided by the air inlet section 415 with a smaller cross-sectional change. On the one hand, it can avoid the outdoor structure, and on the other hand, it can also play a role in rectification. The transition section 416 connected to the air inlet section 415 also needs a certain extension length to achieve the reduction of wind speed and stably connect the air inlet section 415 and the air outlet section 414. When the extension length of the transition section 416 is too long, the length of the air inlet section 415 cannot be guaranteed, the airflow entering the fresh air duct 413 cannot be fully rectified, the airflow direction is disordered, and the wind speed drops too quickly, which is not conducive to the airflow flowing to the fresh air outlet 412. When the extension length of the transition section 416 is too short, the wind speed cannot be fully reduced, and the cross-sectional change of the fresh air duct 413 is too fast, which increases wind resistance. To this end, in this embodiment, the ratio between the extension length D2 of the transition section 416 in the air supply direction of the fresh air duct 413 and the extension length D1 of the air inlet section 415 in the air supply direction is greater than 1.4 and less than 1.6. In this way, the airflow entering the fresh air inlet 411 can be fully rectified, and the cross-section of the air duct can be prevented from changing too quickly. At the same time, the wind speed is reduced to an appropriate range, the air volume is increased, the wind loss is reduced, and a better ventilation effect is achieved. Those skilled in the art will understand that the extension length of the air inlet section 415 is the distance from the starting end of the fresh air inlet 411 to the point where the cross-section of the air duct begins to widen, and the extension length of the transition section 416 is the distance from the end of the air inlet section 415 of the fresh air duct 413 to the point where the height of the air duct cross-section no longer continues to decrease.

[0089] Those skilled in the art will appreciate that the fresh air housing 410 is generally cylindrical, and the cross-section of the fresh air duct 413 varies greatly along the air supply direction. The fresh air housing 410 is usually an injection molded part. If the fresh air housing 410 is integrally molded, it can have better sealing performance, but it is difficult to demold during manufacturing. Therefore, in this embodiment, for ease of manufacturing, please refer to Figures 15 to 17 The fresh air housing 410 is divided into multiple pieces, which are spliced ​​together to form the fresh air duct 413. The splicing surface between two adjacent fresh air housings 410 forms a splicing line 430 on the outer wall surface of the fresh air housing 410. The splicing line 430 extends along the air supply direction of the fresh air duct 413. In this way, the cylindrical fresh air housing 410 can be divided into multiple pieces in the radial direction. The multiple fresh air housings 410 are injection molded separately and then spliced ​​together to facilitate manufacturing.

[0090] Based on the previous embodiment, the fresh air housing 410 is easily affected by the airflow and vibrates during the air supply process. Furthermore, because the air inlet end of the fresh air housing 410 is located on the side closest to the outside, while the air outlet section 414 of the fresh air housing 410 is located on the side closest to the indoor air duct 210, a temperature difference occurs in the air supply direction of the fresh air housing 410, making the fresh air housing 410 susceptible to axial deformation. Furthermore, the air in the fresh air duct 413 is introduced from the outside, and the end of the fresh air duct 413 closest to the indoor air duct 210 is located close to the indoor air duct 210. This is affected by the temperature inside the indoor air duct 210, resulting in a large temperature difference between the inside and outside of the fresh air duct 413, making it susceptible to radial deformation. If the splicing line 430 is set in a smooth straight line, on the one hand, the two adjacent fresh air shells 410 are likely to slide against each other due to vibration and deformation, causing air leakage in the fresh air duct 413. On the other hand, there is a lack of axial and circumferential limit between the two fresh air shells 410 in the fresh air duct 413, and they are likely to be misaligned due to vibration and deformation, causing air leakage. For this reason, please refer to Figure 9 、 Figure 10 and Figure 15 and Figure 16 The splicing line 430 is bent along the air supply direction, so that the splicing surfaces between the adjacent fresh air shells 410 can support each other in the axial and circumferential directions of the fresh air duct 413, thereby reducing the impact of vibration and deformation on the splicing between the fresh air shells 410 and improving the sealing performance of the fresh air duct 413.

[0091] In one embodiment, the bent splicing line 430 has multiple straight segments extending along the air supply direction, and inclined segments connecting the multiple straight segments. Preferably, the angle between the inclined segment and the air supply direction is not less than 30 degrees and not more than 80 degrees, so as to better adapt to the deformation of the fresh air shell 410 and reduce the occurrence of air leakage.

[0092] In one embodiment, see Figure 14 and Figure 17 Two adjacent fresh air shells 410 are provided with a first splicing surface 431 and a second splicing surface 432 that are joined together. The first splicing surface 431 is provided with a boss 4310, and the second splicing surface 432 is provided with a groove that matches the boss 4310. The boss 4310 and the groove both extend in the air supply direction, and the boss 4310 is correspondingly engaged with the groove. In this embodiment, the first splicing surface 431 and the second splicing surface 432 are arranged relative to each other. By making the first splicing surface 431 and the second splicing surface 432 fit together, the two adjacent fresh air shells 410 are assembled together. By providing the boss 4310 and the groove 4320 on the first splicing surface 431 and the second splicing surface 432, the two adjacent fresh air shells 410 are staggered and fit together in the radial direction of the fresh air duct 413. This reduces the possibility of a through seam when the fresh air shell 410 as a whole deforms in the radial direction, thereby enhancing the sealing of the fresh air duct 413.

[0093] Optionally, a sealing device is provided between the joint surfaces of two adjacent fresh air casings 410. The sealing device can be a sealing material, such as rubber, that serves to isolate air from flowing inside and outside the fresh air duct 413. Specifically, the sealing device can be a sealant, such as glass glue, polyurethane, or other adhesive with a certain degree of adhesion and good deformability. This can ensure a tighter bond between the fresh air casings 410 and seal the gaps between the fresh air casings 410, thereby improving the sealing of the fresh air duct 413.

[0094] Multiple fresh air casings 410 can be spliced ​​together in various ways, such as by splitting them into two pieces, one on the left and one on the right, in the direction from the first edge 101 of the bottom plate toward the second edge 102, with the splicing line located at the top wall 421 and bottom of the air duct. In this embodiment, the multiple fresh air casings 410 include an upper fresh air casing 401 and a lower fresh air casing 402, which are stacked vertically. This allows the upper fresh air casing 401 and the lower fresh air casing 402 to fit more tightly under the action of gravity, improving sealing performance and facilitating assembly.

[0095] Based on the previous example, please refer to Figure 15 and Figure 16 The upper and lower fresh air housings 401 and 402 each have a connecting structure protruding outward from their side walls 422, allowing them to be securely connected. This allows the connection between adjacent fresh air housings 410 to be located on the side walls 422 of the fresh air housings 410, compared to the fresh air housings 410 that are spliced ​​together. This provides ample space on the sides of the fresh air housings 410, effectively avoiding the air conditioner's indoor and outdoor structures. Furthermore, this also facilitates assembly of the fresh air housings 410.

[0096] Preferably, the connection structure includes a screw-type mounting portion and a snap-type mounting portion, which are provided on both sides of the fresh air housing 410 in the air supply direction. The screw-type mounting portion includes an upper mounting plate 11 and a lower mounting plate 12, which are respectively provided on the upper fresh air housing 401 and the lower fresh air housing 402, and the upper mounting plate 11 is screwed to the lower mounting plate 12. The snap-type mounting portion includes a clamping block 21 and a buckle 22, which are respectively provided on the upper fresh air housing 401 and the lower fresh air housing 402, and the clamping block 21 and the buckle 22 are snap-connected. In this way, during assembly, the clamping block 21 and the buckle 22 between the upper and lower fresh air housings 402 can be first clamped and limited, and then connected by bolts. This can not only ensure the connection strength between the upper and lower fresh air housings 402, but also facilitate assembly, and can improve the air conditioner's power generation efficiency.

[0097] In one embodiment, see Figures 2 to 5The end of the air outlet section 415 forms a fresh air outlet 412, which is located adjacent to the windward surface of the indoor heat exchanger 300. By arranging the fresh air outlet 412 adjacent to the windward surface of the indoor heat exchanger 300, the indoor heat exchanger 300 can be used for dehumidification during fresh air dehumidification, eliminating the need for a separate fresh air evaporator. This significantly reduces manufacturing costs and improves energy efficiency. Furthermore, the airflow from the fresh air outlet 412 can immediately flow through the indoor heat exchanger 300 and be drawn into the indoor air duct 210 before being blown out through the indoor air outlet. As a result, most of the undehumidified fresh air can first be dehumidified by the indoor heat exchanger 300 before being fully mixed with the indoor air flow and then blown into the room. This significantly reduces the fresh air's circulation path and the mixing ratio of undehumidified fresh air with indoor air, minimizing the impact of the fresh air on indoor temperature and humidity, thereby improving user comfort. To determine whether the window air conditioner needs to turn on the dehumidification mode, the indoor temperature sensor and humidity sensor can be used together to determine.

[0098] Further, see Figure 2 and Figure 7 Because the indoor air duct housing 200 requires sufficient space, the indoor air duct housing 200 and the indoor side structure are typically adapted to the length of the chassis 100, making the overall structure more compact. The fresh air housing 410 is mounted on the chassis 100 and extends from the outdoor side to the indoor side. The fresh air housing 410 can be directly inserted through the indoor air duct housing 200, and a sealing structure or the like is provided at the connection between the fresh air housing 410 and the indoor air duct housing 200 to achieve a seal. In another embodiment, the air outlet section 414 of the fresh air housing 410 is at least partially located between the lower end of the indoor air duct housing 200 and the chassis 100. This allows a portion of the fresh air housing 410 to be located below the indoor air duct housing 200, effectively allowing the fresh air housing 410 to be introduced into the room from below the indoor air duct housing 200. This prevents the fresh air housing 410 from interfering with the indoor air duct 210, and eliminates the need for perforations or sealing structures in the indoor air duct housing 200, simplifying the manufacturing process and installation. At the same time, the space occupied by the fresh air shell 410 is reduced, making the structure of the whole machine more compact, and the volume of the whole machine will not be increased while meeting the independent outlet of fresh air.

[0099] Building on the previous embodiment, the fresh air housing 410, located below the indoor air duct housing 200, is further spaced apart from the lower end of the indoor air duct housing 200. It should be noted that the gap between the fresh air housing 410 and the lower end of the indoor air duct housing 200 should be minimized while preventing the weight of the indoor air duct housing 200 from being transmitted to the fresh air housing 410. This prevents air leakage. Typically, the gap between the fresh air housing 410 and the lower end of the indoor air duct housing 200 is less than or equal to 5 mm. By spacing the fresh air housing 410 from the lower end of the indoor air duct housing 200, the fresh air housing 410 is not subjected to loads, thereby reducing damage. In other embodiments, the fresh air housing 410 can be in contact with or connected to the indoor air duct housing 200. To do this, reinforcing ribs can be provided on the fresh air housing 410 or its structural strength can be increased to allow it to withstand some of the weight of the indoor air duct housing 200.

[0100] In one embodiment, if Figures 1 to 5 As shown, the window air conditioner further includes a housing 500 mounted on the chassis 100. The indoor air duct housing 200 and the indoor heat exchanger 300 are located within the housing 500. The front wall of the housing 500 is provided with an indoor air inlet 510. The end of the air outlet section 414 is located outside the front wall of the housing 500, and the fresh air outlet 412 is provided adjacent to the indoor air inlet 510.

[0101] In this embodiment, the housing 500 is also provided with an indoor air outlet. The indoor air outlet can be specifically arranged at the junction of the front wall and the top surface of the housing 500, so that the indoor air outlet supplies air diagonally upward. On the one hand, this can prevent the wind from blowing directly on the user and the ceiling, and on the other hand, it can allow the airflow to blow further, thereby achieving a better mixed flow effect and thus a more uniform indoor temperature distribution. By arranging the air outlet section 414 of the fresh air shell 410 on the outside of the housing 500, the indoor heat exchanger 300 can be directly attached to the front wall of the housing 500, and the airflow entering from the indoor air inlet 510 can directly enter the indoor heat exchanger 300, thereby improving the heat exchange efficiency. In addition, the air outlet section 414 is arranged outside the housing 500, which can increase the fresh air circulation rate, thereby ensuring a sufficient amount of fresh air. The fresh air outlet 412 is arranged adjacent to the indoor air inlet 510, so that the fresh air near the indoor air inlet 510 can be quickly sucked into the shell 500 for dehumidification and then blown out from the indoor air outlet. The undehumidified fresh air will not be blown to a place far away from the window air conditioner, and thus it is not easy to mix with the indoor air far away from the window air conditioner indoor unit, and thus will not significantly or almost not affect the indoor air flow.

[0102] In another embodiment, the indoor heat exchanger 300 is spaced apart from the front wall of the housing 500, with the air outlet section 414 located between them. The fresh air outlet 412 is connected to the indoor air duct 210. By locating the air outlet section 414 between the indoor heat exchanger 300 and the front wall of the housing 500, the gap between the indoor heat exchanger 300 and the front wall of the housing 500 can be utilized to allow the fresh air from the air outlet section 414 to quickly flow toward the indoor heat exchanger 300 for heat exchange. In other words, the indoor impeller can draw both the indoor air and the fresh air from the fresh air outlet 412 into the indoor air duct 210, where they are dehumidified. This dehumidifies the fresh air, minimizing its impact on the indoor air, while also ensuring that the airflow throughout the house is solely dehumidified, thereby increasing dehumidification efficiency. Preferably, the fresh air outlet 412 is arranged toward the windward side of the indoor heat exchanger 300. In this way, all the undehumidified air flow blown out from the fresh air outlet 412 can be blown directly to the indoor heat exchanger 300 without blowing into the room, thereby not affecting the indoor temperature and humidity.

[0103] The opening direction of the fresh air outlet 412 can be various. If the fresh air outlet 412 is set toward the windward side of the indoor heat exchanger 300 or the indoor air inlet 510, it is necessary to make a larger gap between the indoor heat exchanger 300 and the front wall of the shell 500, or make the structure of the air outlet section 414 more complicated, which will increase the volume of the whole machine to a certain extent. Moreover, the fresh air outlet 412 is set directly toward the front wall of the indoor heat exchanger 300 or the shell 500, which has a large wind resistance and reduces the flow rate of the fresh air circulation. In one embodiment, please refer to 1 to Figure 5 , the opening of the fresh air outlet 412 is set upward. By setting the fresh air outlet 412 upward, the gap between the indoor heat exchanger 300 and the front wall of the shell 500 is fully utilized to increase the circulation rate of the fresh air, and the fresh air blown out from the fresh air outlet 412 can quickly enter the indoor heat exchanger 300 for dehumidification. Thereby, the impact of the fresh air on the indoor air flow is reduced while meeting the fresh air intake volume. In another embodiment, the opening of the fresh air outlet 412 is set forward, so that the fresh air flows in the direction of the room, wherein most of the fresh air is sucked into the indoor air duct 210 under the action of the indoor wind wheel, and is dehumidified through the indoor air duct 210. The remaining fresh air enters the room forward, triggering indoor air circulation, making the user feel the air is fresher more obviously, thereby improving the user experience.

[0104] In one embodiment, please refer to Figures 2 to 4The window air conditioner also includes a compressor 600 mounted on the chassis 100. The fresh air device 400 and the compressor 600 are located on either side of the chassis 100 in the longitudinal direction. Since the compressor 600 occupies a large space and is relatively heavy, placing the fresh air device 400 and the compressor 600 on either side of the chassis 100 in the longitudinal direction not only improves the layout and makes the overall arrangement more compact, fully utilizing the installation space on the chassis 100, but also makes the weight distribution on the chassis 100 more even, preventing deformation of the chassis 100 due to uneven gravity distribution and facilitating installation of the entire unit.

[0105] In one embodiment, if Figure 3 and Figure 5 As shown, the window air conditioner also includes a shell 500 installed on the chassis 100, the indoor air duct shell 200 and the indoor heat exchanger 300 are located in the shell 500, and the front wall of the shell 500 is provided with an indoor air inlet 510. The indoor heat exchanger 300 includes a corresponding first indoor heat exchanger 310 and a second indoor heat exchanger 320. The window air conditioner has a constant temperature dehumidification mode. In the constant temperature dehumidification mode, one of the first indoor heat exchanger 310 and the second indoor heat exchanger 320 is in heating mode, and the other is in cooling mode.

[0106] In this embodiment, the indoor heat exchanger 300 includes a first indoor heat exchanger 310 and a second indoor heat exchanger 320. In constant temperature dehumidification mode, one of the first indoor heat exchanger 310 and the second indoor heat exchanger 320 is in heating mode, while the other is in cooling mode. This allows the airflow passing through the indoor heat exchanger 300 to be simultaneously heated and dehumidified. The resulting mixed air is at a suitable temperature, eliminating the sense of coolness. This reciprocating cycle not only rehumidifies all indoor air and fresh air, but also ensures that the overall indoor temperature does not drop in the window air conditioner's dehumidification mode, achieving constant temperature and dehumidification throughout the entire house. Furthermore, the indoor heat exchanger 300 is fully utilized during dehumidification, eliminating the need for a separate fresh air condenser and evaporator, significantly reducing manufacturing costs.

[0107] In one embodiment, please refer to Figure 5The first indoor heat exchanger 310 and the second indoor heat exchanger 320 are stacked along the air inlet direction of the indoor side air duct 210. When the first indoor heat exchanger 310 and the second indoor heat exchanger 320 are stacked along the air inlet direction of the indoor side air duct 210, the indoor air or fresh air entering from the indoor air inlet 510 is first dehumidified / heated by the first indoor heat exchanger 310, and then heated / dehumidified by the second indoor heat exchanger 320. The indoor fan delivers the heated and dehumidified airflow into the room from the indoor air outlet, achieving constant temperature and dehumidification throughout the house. By stacking the first indoor heat exchanger 310 and the second indoor heat exchanger 320 along the air inlet direction, all airflows blowing out from the indoor air inlet 510 can be heated and then dehumidified simultaneously, eliminating the need to separate heating and dehumidification into two different airflows. This reduces the mixing step and makes the temperature and humidity of the airflow blowing out from the indoor air outlet more uniform and comfortable.

[0108] In another implementation, see Figure 3 The first indoor heat exchanger 310 and the second indoor heat exchanger 320 are arranged side by side in the air inlet direction perpendicular to the indoor side air duct 210, so that part of the airflow entering from the indoor air inlet 510 blows toward the first indoor heat exchanger 310, and the other part blows toward the second indoor heat exchanger 320.

[0109] In this embodiment, the air inlet direction of the indoor air duct 210 is typically front-to-back. Directions perpendicular to the air inlet direction can be left-to-right or up-to-down. In this manner, the first indoor heat exchanger 310 and the second indoor heat exchanger 320 can be arranged vertically or horizontally. The fresh air or indoor air entering through the indoor air inlet 510 is partially heated / dehumidified by the first indoor heat exchanger 310, while the remaining portion is dehumidified / heated by the second indoor heat exchanger 320. The air then mixes within the indoor air duct 210 to form a dry airflow at an appropriate temperature. The indoor fan then delivers the constant-temperature dry airflow into the room from the indoor air outlet, achieving constant-temperature dehumidification throughout the house. When the first indoor heat exchanger 310 and the second indoor heat exchanger 320 are arranged vertically, a single indoor heat exchanger can be provided, with its upper portion divided into the first indoor heat exchanger 310 and its lower portion divided into the second indoor heat exchanger 320. A control valve can be used to control either the upper or lower heat exchanger to operate in heating mode or cooling mode. This significantly reduces the space occupied by the indoor heat exchanger 300, resulting in a more compact overall structure and a smaller unit. By arranging the first indoor heat exchanger 310 and the second indoor heat exchanger 320 vertically or horizontally, the thickness of the indoor heat exchanger 300 can be significantly reduced, fully utilizing the height space of the housing 500. This reduces the space occupied by the indoor heat exchanger 300 and reduces the overall unit size and weight.

[0110] In one embodiment, if Figure 18As shown, the window air conditioner also includes an outdoor heat exchanger 700, a refrigerant circulation pipeline, a first valve 810 and a second valve 820. The refrigerant outlet of the compressor 600 of the window air conditioner is provided with a discharge pipe 610, and the refrigerant inlet is provided with a suction pipe 620. The discharge pipe 610, the outdoor heat exchanger 700, the first indoor heat exchanger 310, the second indoor heat exchanger 320, and the suction pipe 620 are connected in sequence through the refrigerant circulation pipeline. The first valve 810 is connected in series to the refrigerant circulation pipeline between the outdoor heat exchanger 700 and the first indoor heat exchanger 310, and the second valve 820 is connected in series to the refrigerant circulation pipeline between the first indoor heat exchanger 310 and the second indoor heat exchanger 320.

[0111] In this embodiment, the compressor 600 can be a variable frequency compressor 600 or a fixed frequency compressor 600. By making the compressor 600 a variable frequency compressor 600, it is possible to better realize the dual system of refrigeration and constant temperature dehumidification, saving one compressor 600, thereby making the overall structure simpler, reducing costs and power, and greatly improving energy efficiency. The first valve 810 and the second valve 820 can be solenoid valves, electronic expansion valves or throttle valves, which can control the on-off or flow rate of the pipes in which they are located. By providing the first valve 810 and the second valve 820, it is possible to control whether the refrigerant flows into the first indoor heat exchanger 310 and the second indoor heat exchanger 320, thereby controlling whether the first indoor heat exchanger 310 and the second indoor heat exchanger 320 participate in cooling or heating.

[0112] When the dehumidification mode needs to be turned on, the high-temperature refrigerant flowing out of the compressor 600 enters the outdoor heat exchanger 700 (condenser), and the high-temperature refrigerant coming out of the outdoor heat exchanger 700 reaches the first valve 810. At this time, the first valve 810 can be fully or mostly opened, so that the temperature of the outdoor heat exchanger 700 is equal to or slightly lower than the temperature of the first indoor heat exchanger 310. At this time, the first indoor heat exchanger 310 is a condenser, which plays the role of heating the air flow. Then the sub-high-temperature refrigerant flowing out of the first indoor heat exchanger 310 reaches the second valve 820. The second valve 820 is partially opened, which plays the role of capillary throttling. After throttling, the refrigerant becomes a low-temperature refrigerant and flows through the second indoor heat exchanger 320. At this time, the second indoor heat exchanger 320 is an evaporator, which plays the role of cooling, that is, dehumidification. The refrigerant flowing out of the second indoor heat exchanger 320 returns to the compressor 600. In this way, the fresh air and indoor air are mixed, partially heated by the first indoor heat exchanger 310, and partially cooled and dehumidified by the second indoor heat exchanger 320. The mixed air then enters the indoor air duct 210 to form a dry airflow at a suitable temperature, which is then blown out through the indoor air outlet. This achieves the purpose of dehumidifying the room without blowing cold air, and the dehumidification effect is better. Of course, the first indoor heat exchanger 310 can also serve as an evaporator, and the second indoor heat exchanger 320 as a condenser, which can also achieve the purpose of constant temperature dehumidification.

[0113] When dehumidification is not required and only the full cooling mode needs to be turned on, the high-temperature refrigerant flowing out of the compressor 600 enters the outdoor heat exchanger 700 (condenser), and the high-temperature refrigerant coming out of the outdoor heat exchanger 700 reaches the first valve 810. At this time, a small part of the first valve 810 is opened to play the role of capillary flow, so that the temperature of the first indoor heat exchanger 310 is much lower than the temperature of the outdoor heat exchanger 700. At this time, the first indoor heat exchanger 310 is an evaporator, which plays a role of cooling. Then the low-temperature refrigerant flowing out of the first indoor heat exchanger 310 reaches the second valve 820. The second valve 820 is fully or mostly open, which plays a role of full passage or re-throttling. The refrigerant passing through the second valve 820 flows through the second indoor heat exchanger 320. At this time, the second indoor heat exchanger 320 is an evaporator, which plays a role of secondary cooling. The refrigerant flowing out of the second indoor heat exchanger 320 returns to the compressor 600. In this way, the fresh air and indoor air are mixed and cooled through the first indoor heat exchanger 310, and then cooled again through the second indoor heat exchanger 320. After entering the indoor side air duct 210, it is blown out from the indoor air outlet, thereby achieving the purpose of rapid indoor cooling.

[0114] In one embodiment, if Figure 19 As shown, the refrigerant circulation circuit includes a first pipe 830 connecting the discharge pipe 610 and the outdoor heat exchanger 700, and a second pipe 840 connecting the suction pipe 620 and the second indoor heat exchanger 320. The window air conditioner also includes a switching device 900, which is serially connected to the first pipe 830 and the second pipe 840. The switching device 900 has a first switching state and a second switching state. In the first switching state, the first pipe 830 connected to both ends of the switching device 900 is in communication, and the second pipe 840 connected to both ends of the switching device 900 is in communication. In the second switching state, the first pipe 830 between the discharge pipe 610 and the switching device 900 is in communication with the second pipe 840 between the switching device 900 and the second indoor heat exchanger 320, and the first pipe 830 between the outdoor heat exchanger 700 and the switching device 900 is in communication with the second pipe 840 between the suction pipe 620 and the switching device 900.

[0115] In this embodiment, it is understood that the window air conditioner further includes a controller, which is electrically connected to the first valve 810, the second valve 820, and the switching device 900, thereby controlling the switching state of the switching device 900 and the opening and closing of each valve. The switching device 900 can be a four-way valve or other switching device 900 that prevents refrigerant from entering the outdoor heat exchanger 700 and the second indoor heat exchanger 320 at the same time. The switching device 900 can increase the functionality of the air conditioner. It is understood that the switching device 900 is connected in series to the first pipe 830 and the second pipe 840, that is, the two ends of the switching device 900 are connected to the first pipe 830, and the two ends are connected to the second pipe 840.

[0116] When the switching device 900 is in the first switching state, the high-temperature refrigerant flowing out of the discharge pipe 610 of the compressor 600 flows through the first pipe 830 to the outdoor heat exchanger 700, then flows into the first indoor heat exchanger 310 and the second indoor heat exchanger 320 in sequence, and finally flows back to the compressor 600 through the second pipe 840 and the suction pipe 620. By controlling the opening of the first valve 810 and the second valve 820, the first indoor heat exchanger 310 can be controlled to be in a cooling state or a heating state, thereby controlling the entire system to be in a constant temperature dehumidification mode or a full cooling system. The first valve 810 and the second valve 820 control whether the first indoor heat exchanger 310 is in a cooling state or a heating state, which is similar to the above-mentioned embodiment without switching states and will not be described in detail here.

[0117] When the switching device 900 is in the second switching state, the high-temperature refrigerant flowing out of the discharge pipe 610 of the compressor 600 flows into the second indoor heat exchanger 320 through the first pipe 830 and the second pipe 840, then flows to the first indoor heat exchanger 310 and the outdoor heat exchanger 700, and finally flows back to the compressor 600 through the first pipe 830, the second pipe 840, and the suction pipe 620. By controlling the opening degree of the first valve 810 and the second valve 820, the first indoor heat exchanger 310 can be controlled to be in the cooling state or the heating state, thereby controlling whether the entire system is in the constant temperature dehumidification mode or the full heating state.

[0118] When the full heating mode is on, the switching device 900 is in the second switching state. The high-temperature refrigerant flowing out of the discharge pipe 610 of the compressor 600 flows into the second indoor heat exchanger 320 through the first pipe 830 and the second pipe 840. At this time, the second indoor heat exchanger 320 acts as a condenser heating device, so that the high-temperature refrigerant from the second indoor heat exchanger 320 reaches the second valve 820. At this time, the second valve 820 is fully opened, and the high-temperature refrigerant continues to flow out to the first indoor heat exchanger 310, which acts as a reheating device. After the second high-temperature refrigerant reaches the first valve 810, the first valve 810 acts as a capillary throttling device. After throttling, the refrigerant becomes low-temperature refrigerant, flows through the outdoor heat exchanger 220, and returns to the compressor 600. In this way, the purpose of rapid indoor heating can be achieved.

[0119] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A window air conditioner, characterized in that: include: chassis; a fresh air device, mounted on the chassis and used to deliver fresh air into the room, the fresh air device comprising a fresh air shell extending from the outdoors to the indoors, the fresh air shell being provided with a fresh air inlet communicating with the outdoors, a fresh air outlet communicating with the indoors, and a fresh air duct communicating with the fresh air inlet and the fresh air outlet, the fresh air shell having an air inlet section adjacent to the fresh air inlet, an air outlet section adjacent to the fresh air outlet, and a transition section provided between the air inlet section and the air outlet section, the maximum ventilation area of ​​the transition section being greater than the maximum ventilation areas of the air inlet section and the air outlet section, so that the minimum flow velocity of the airflow in the transition section is less than the flow velocity at both ends of the transition section; The fresh air device further includes a fresh air blower for directing air flow from the fresh air inlet to the fresh air outlet; The transition section includes a connected expansion area and a pressurization area, the expansion area is connected to the air inlet section, and the pressurization area is connected to the air outlet section. The expansion area is gradually expanded from the air inlet section to the pressurization area, and the pressurization area is gradually contracted from the expansion area to the air outlet section.

2. The window air conditioner according to claim 1, wherein: The ratio of the maximum ventilation area S of the transition section to the maximum ventilation area S1 of the air inlet section is greater than 1.4 and less than 1.6; and / or, The ratio of the maximum ventilation area S of the transition section to the maximum ventilation area S2 of the air outlet section is greater than 3.5 and less than 4.

3. The window air conditioner according to claim 1, wherein: The chassis has a first edge and a second edge extending in the front-to-back direction. The distance that the cross-section of the fresh air duct extends along the first edge toward the second edge is the cross-sectional width. The cross-sectional height of the air inlet section is greater than that of the air outlet section. The cross-sectional width of the air outlet section is greater than that of the air inlet section. The cross-sectional height of the transition section is at least partially gradually reduced from the air inlet section to the air outlet section, and the cross-sectional width of the transition section is at least partially gradually increased from the air inlet section to the air outlet section.

4. The window type air conditioner according to claim 3, wherein: The cross-sectional height of the air inlet section is H1, the cross-sectional height of the air outlet section is H2, and the ratio of H1 to H2 is greater than 4.1 and less than 5.1; and / or, The cross-sectional width of the air inlet section is L1, the cross-sectional width of the air outlet section is L2, and the ratio of L1 to L2 is greater than 0.48 and less than 0.

58.

5. The window type air conditioner according to claim 3, wherein: The top wall of the transition section is at least partially configured as an outwardly convex arc surface.

6. The window type air conditioner according to claim 5, wherein: The bending radius R of the top wall in the transition section is greater than 160 mm and less than 200 mm.

7. The window type air conditioner according to claim 1, wherein: A ratio of an extension length D2 of the transition section in the air supply direction of the fresh air duct to an extension length D1 of the air inlet section in the air supply direction is greater than 1.4 and less than 1.

6.

8. The window air conditioner according to claim 1, wherein: The fresh air shell includes multiple pieces, and the multiple fresh air shells are spliced ​​together to form the fresh air duct. The splicing surface between two adjacent fresh air shells forms a splicing line on the outer wall surface of the fresh air shell, and the splicing line extends along the air supply direction of the fresh air duct.

9. The window air conditioner according to claim 8, wherein: The splicing line is bent along the air supply direction.

10. The window type air conditioner according to claim 8, wherein There is a first splicing surface and a second splicing surface between the two adjacent fresh air shells, the first splicing surface is provided with a boss, and the second splicing surface is provided with a groove adapted to the boss, the boss and the groove both extend along the air supply direction, and the boss is correspondingly embedded in the groove.

11. The window air conditioner according to claim 8, wherein A sealing device is provided between the joint surfaces of two adjacent fresh air shells.

12. The window type air conditioner according to claim 8, wherein The multiple fresh air shells include an upper fresh air shell and a lower fresh air shell, and the upper fresh air shell and the lower fresh air shell are stacked in the upper and lower directions.

13. The window type air conditioner according to claim 12, wherein: The side walls of the upper fresh air shell and the lower fresh air shell are respectively provided with connecting structures protruding outwards, so that the upper fresh air shell and the lower fresh air shell are connected and fixed by the connecting structures.

14. The window type air conditioner according to claim 13, wherein: The connecting structure includes a screw-on mounting part and a clip-on mounting part, and the screw-on mounting part and the clip-on mounting part are arranged on both sides of the fresh air shell in the air supply direction. The screw-on mounting part includes an upper mounting plate and a lower mounting plate respectively arranged on the upper fresh air shell and the lower fresh air shell, and the upper mounting plate is screwed to the lower mounting plate. The clip-on mounting part includes a clamping block and a clip respectively arranged on the upper fresh air shell and the lower fresh air shell, and the clamping block and the clip are clipped.

15. The window air conditioner according to any one of claims 1 to 14, wherein: The window air conditioner also includes an indoor air duct shell and an indoor heat exchanger. The indoor air duct shell is installed on the front side of the chassis. An indoor air duct is formed in the indoor air duct shell. The indoor heat exchanger is installed on the chassis and is arranged corresponding to the air inlet end of the indoor air duct. The end of the air outlet section forms the fresh air outlet, and the fresh air outlet is arranged adjacent to the windward surface of the indoor heat exchanger.

16. The window type air conditioner according to claim 15, wherein: The air outlet section of the fresh air housing is at least partially located between the lower end of the indoor air duct housing and the chassis.

17. The window type air conditioner according to claim 15, wherein: The window air conditioner further comprises a shell mounted on the chassis, the indoor air duct shell and the indoor heat exchanger are located in the shell, and the front side wall of the shell is provided with an indoor air inlet; The end of the air outlet section is located outside the front wall of the shell, and the fresh air outlet is arranged adjacent to the indoor air inlet; or, The indoor heat exchanger is spaced apart from the front wall of the shell, the end of the air outlet section is located between the indoor heat exchanger and the front wall of the shell, and the fresh air outlet is connected to the indoor air duct.

18. The window type air conditioner according to claim 17, wherein: The opening of the fresh air outlet is arranged upward; or, The opening of the fresh air outlet is arranged to face forward.

19. The window type air conditioner according to claim 15, wherein: The window air conditioner also includes a shell installed on the chassis, the indoor air duct shell and the indoor heat exchanger are located in the shell, the front wall of the shell is provided with an indoor air inlet, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger arranged corresponding to the indoor air inlet, and the window air conditioner has a constant temperature dehumidification mode. In the constant temperature dehumidification mode, one of the first indoor heat exchanger and the second indoor heat exchanger is in heating mode, and the other is in cooling mode.

20. The window type air conditioner according to claim 19, wherein: The first indoor heat exchanger and the second indoor heat exchanger are stacked along the air inlet direction of the indoor air duct; or, The first indoor heat exchanger and the second indoor heat exchanger are arranged side by side in a direction perpendicular to the air inlet direction of the indoor air duct, so that part of the airflow entering from the indoor air inlet blows toward the first indoor heat exchanger and the other part blows toward the second indoor heat exchanger.

21. The window type air conditioner according to claim 20, wherein: The window air conditioner further includes an outdoor heat exchanger, a refrigerant circulation pipeline, a first valve and a second valve; The refrigerant outlet of the compressor of the window air conditioner is provided with a discharge pipe, and the refrigerant inlet is provided with a suction pipe; The discharge pipe, the outdoor heat exchanger, the first indoor heat exchanger, the second indoor heat exchanger, and the suction pipe are connected in sequence through the refrigerant circulation pipeline; The first valve is connected in series to the refrigerant circulation pipeline between the outdoor heat exchanger and the first indoor heat exchanger, and the second valve is connected in series to the refrigerant circulation pipeline between the first indoor heat exchanger and the second indoor heat exchanger.

22. The window type air conditioner according to claim 21, wherein: The refrigerant circulation pipeline includes a first pipe connecting the discharge pipe and the outdoor heat exchanger, and a second pipe connecting the suction pipe and the second indoor heat exchanger; the window air conditioner also includes a switching device; The switching device is connected in series to the first pipe and the second pipe, and the switching device has a first switching state and a second switching state; In the first switching state, the first pipe connected to both ends of the switching device is conductive, and the second pipe connected to both ends of the switching device is conductive; In the second switching state, the first pipe between the discharge pipe and the switching device is connected to the second pipe between the switching device and the second indoor heat exchanger, and the first pipe between the outdoor heat exchanger and the switching device is connected to the second pipe between the suction pipe and the switching device.

23. The window type air conditioner according to claim 22, wherein: The window air conditioner further comprises a controller, wherein the controller is electrically connected to the switching device, the first valve and the second valve; When the window air conditioner is in a constant temperature dehumidification mode, the controller is used to control the switching device to be in a first switching state, and to control the first valve to be fully opened and the second valve to be partially opened; and / or, The window air conditioner also has a full cooling mode. When the window air conditioner is in the full cooling mode, the controller is used to control the switching device to be in a first switching state, and to control the first valve to be partially opened and the second valve to be fully opened; and / or, The window air conditioner also has a full heating mode. When the window air conditioner is in the full heating mode, the controller is used to control the switching device to be in a second switching state, and to control the second valve to be fully opened and the first valve to be partially opened.

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