air conditioner

Abstract

The present invention provides an air conditioner, which includes a shell, a heat exchange duct, a fresh air duct, a bypass duct and an air damper. The heat exchange duct is arranged in the shell, and has an air supply port for blowing the heat exchange air flow produced by the air conditioner to the indoor environment. The fresh air duct is arranged in the shell, and is used to introduce outdoor fresh air. The bypass duct is arranged in the shell and is connected to the heat exchange duct, and is used to guide the air flow in the heat exchange duct to the fresh air duct and / or the outdoor environment. The damper is configured to controllably adjust the airflow distribution ratio of the bypass duct to the fresh air duct and the outdoor environment. The air conditioner of the present invention can prevent the fresh air flow with too high or too low temperature from directly entering the indoor environment, and can speed up the speed of indoor fresh air exchange.

Description

Technical Field

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

[0002] Today's air conditioners offer more than just basic cooling and heating functions. To meet users' more advanced air processing needs, some air conditioners offer additional processing capabilities to further condition indoor air. For example, some air conditioners have a fresh air function that draws in fresh air from the outside to maintain a fresh indoor environment.

[0003] However, current fresh air air conditioners have some drawbacks. For example, in winter, when the fresh air function is on, the indoor temperature is high and the outdoor temperature is low, and the introduction of cooler fresh air can easily undermine the heating effect. In summer, when the fresh air function is on, the indoor temperature is low and the outdoor temperature is high, and the introduction of hotter fresh air can easily undermine the cooling effect. Summary of the Invention

[0004] The object of the present invention is to overcome at least one defect in the prior art and to provide an air conditioner that can prevent fresh air flow from damaging the cooling / heating effect.

[0005] A further object of the present invention is to optimize the structure of the fresh air duct for introducing the heat exchange airflow.

[0006] A further object of the present invention is to speed up the speed of indoor fresh air exchange.

[0007] In particular, the present invention provides an air conditioner comprising:

[0008] case;

[0009] A heat exchange air duct is provided in the housing and has an air outlet for blowing the heat exchange airflow produced by the air conditioner into the indoor environment;

[0010] A fresh air duct is provided in the housing for introducing fresh air from outside;

[0011] a bypass air duct, disposed in the housing and connected to the heat exchange air duct, for directing the airflow in the heat exchange air duct to the fresh air duct and / or the outdoor environment; and

[0012] The damper is configured to controllably adjust the airflow distribution ratio of the bypass air duct to the fresh air duct and the outdoor environment.

[0013] Optionally, the bypass air duct is a three-way pipe type, having an air inlet channel, a first air outlet channel and a second air outlet channel;

[0014] The air inlet channel is connected to the heat exchange air duct, the first air outlet channel is connected to the fresh air duct, the second air outlet channel is connected to the exhaust pipe, and the exhaust pipe is connected to the outdoor environment.

[0015] Optionally, one end of the damper is rotatably connected to the junction of the inlet end of the first air outlet channel and the inlet end of the second air outlet channel, so as to be rotated to a first angle for closing the first air outlet channel, or to a second angle for closing the second air outlet channel, or to multiple adjustment angles between the first angle and the second angle.

[0016] Optionally, the air conditioner further comprises:

[0017] a heat exchanger, disposed in the housing, for exchanging heat with the airflow passing therethrough to form the heat exchange airflow; and

[0018] The first fan is arranged in the heat exchange air duct to promote the heat exchange air flow to flow toward the air supply port.

[0019] Optionally, the air conditioner further includes: a third fan, which is arranged in the bypass air duct, and whose rotating shaft is connected to the first fan to rotate with the first fan to promote the air flow in the bypass air duct.

[0020] Optionally, the first fan is a cross-flow fan;

[0021] The heat exchange air duct is a cross-flow air duct, and an exhaust port connected to the bypass air duct is opened at one axial end thereof to inject air flow into the bypass air duct; and

[0022] At least one blade is fixedly provided at an axial end of the first fan, for blowing the airflow in a direction axially away from the first fan when the first fan is running, so that the airflow flows into the bypass air duct.

[0023] Optionally, the air conditioner is a vertical air conditioner, the shell defines a lower chamber located below the heat exchange air duct, and the fresh air duct and the bypass air duct are located in the lower chamber.

[0024] Optionally, the fresh air duct has a fresh air inlet and a fresh air outlet, the fresh air inlet is used to connect with a fresh air pipe connected to the outdoor environment, and the fresh air outlet is oriented towards the indoor environment for discharging fresh air.

[0025] Optionally, the air conditioner further comprises: a second fan, disposed in the lower chamber, for promoting the flow of fresh air in the fresh air duct; and

[0026] The fresh air duct includes an upstream section and a downstream section, the inlet of the upstream section constitutes the fresh air inlet, and the outlet is connected to the inlet of the second fan; the inlet of the downstream section is connected to the outlet of the second fan, and the outlet constitutes the fresh air outlet;

[0027] The bypass air duct is connected to the downstream section, and the airflow directions of the two sections form an acute angle.

[0028] Optionally, the second fan is a centrifugal fan with a vertically extending axis; and the upstream section is located below the second fan, and the downstream section is located in front of the second fan.

[0029] The air conditioner of the present invention is provided with a fresh air duct for introducing fresh air flow, so that the indoor environment remains fresh and healthy. In addition, the present invention improves the fresh air supply effect of the air conditioner by connecting the fresh air duct with the outdoor environment through a bypass duct. For example, when the air conditioner is in cooling / heating operation, the heat exchange airflow in the heat exchange duct can be directed to the fresh air duct so that it mixes with the fresh air flow. During heating, the temperature of the low-temperature fresh air flow is increased, and during cooling, the temperature of the high-temperature fresh air flow is reduced, so that the fresh air flow is blown to the indoor environment at a more comfortable temperature. When the air conditioner stops cooling / heating, the airflow in the heat exchange duct (from the indoor environment) can be directed to the outdoor environment, and the fresh air duct can be used to introduce outdoor fresh air, thereby accelerating the exchange of indoor and outdoor air and the speed of indoor fresh air exchange. In addition, the bypass duct can also be used to simultaneously direct the airflow of the heat exchange duct to the fresh air duct and the outdoor environment, and the air volume ratio between the two can be adjusted to both adjust the fresh air temperature and speed up the fresh air exchange.

[0030] Furthermore, in the air conditioner of the present invention, a third fan is provided in the bypass air duct. When the first fan rotates, the third fan is also driven to rotate, which can promote the flow of air in the bypass air duct. Moreover, the third fan is connected to the first fan, and no motor is required, which reduces the cost.

[0031] Furthermore, in the air conditioner of the present invention, the heat exchange duct is a crossflow duct, and the first fan is a crossflow fan. An exhaust port is provided at the axial end of the heat exchange duct to inject air into the bypass duct, resulting in a highly novel structure. Furthermore, blades (e.g., axial flow blades) can be fixed to the end of the first fan. During operation, the blades rotate accordingly, forming a compact fan, allowing the heat exchange airflow within the first fan's cavity to be directed into the bypass duct, resulting in a highly ingenious structure.

[0032] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0034] Figure 1 is a schematic front view of an air conditioner according to one embodiment of the present invention;

[0035] Figure 2 yes Figure 1 a schematic right side view of the air conditioner shown;

[0036] Figure 3 yes Figure 1 A schematic diagram of the structure of the lower half of the interior of the air conditioner is shown;

[0037] Figure 4 yes Figure 3 The schematic diagram of the air conditioner shown is when the air door is at a first angle;

[0038] Figure 5 yes Figure 3 A schematic diagram of the physical structure of the heat exchange air duct in the air conditioner shown;

[0039] Figure 6 yes Figure 3 The schematic diagram of the physical structure of the first fan in the air conditioner is shown. DETAILED DESCRIPTION

[0040] Refer to the following Figures 1 to 6 The air conditioner according to the embodiment of the present invention is described below. The directions or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "top," "bottom," "inner," "outer," and "lateral" are based on the directions or positional relationships illustrated in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention.

[0041] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the definition of "first", "second", etc. can explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0042] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," "coupled," and the like should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] An embodiment of the present invention provides an air conditioner. The air conditioner is used to condition indoor air, including adjusting air temperature, humidity, and air quality, humidifying and dehumidifying the indoor air, and introducing fresh air. The air conditioner can comprise a vapor compression refrigeration cycle system consisting of an evaporator, a condenser, a compressor, a throttling device, and other necessary components. The air conditioner outputs cold / hot air through a fan, achieving cooling and heating of the indoor environment.

[0044] The air conditioner of the embodiment of the present invention can be a household air conditioner or a central air conditioner. Specifically, the air conditioner can be in various forms, such as a split wall-mounted type, a split vertical type, an integrated type, a patio type, etc. The embodiment of the present invention does not impose any limitation on the specific form of the air conditioner. Figures 1 to 6 Only the embodiment of the vertical air conditioner is illustrated.

[0045] Figure 1 is a schematic front view of an air conditioner according to one embodiment of the present invention; Figure 2 yes Figure 1 a schematic right side view of the air conditioner shown; Figure 3 yes Figure 1 A schematic diagram of the structure of the lower half of the interior of the air conditioner is shown; Figure 4 yes Figure 3 Schematic diagram of the air conditioner shown when the air door is at a first angle.

[0046] like Figures 1 to 4 As shown, the air conditioner according to the embodiment of the present invention may generally include a housing 10 , a heat exchange air duct 11 , a fresh air duct 30 , a bypass air duct 20 and a damper 25 .

[0047] The housing 10 defines the main body of the air conditioner, which defines a receiving space to accommodate the main components of the air conditioner, such as a heat exchanger, a fan, a controller and other components. Figure 1 and Figure 2 The indoor unit housing of a split vertical air conditioner is shown.

[0048] The heat exchange duct 11 is disposed within the housing 10 and has an air outlet 112 for delivering the heat exchange airflow produced by the air conditioner to the indoor environment. Furthermore, the heat exchange duct 11 may also have an air inlet 111 to allow indoor air to enter the heat exchange duct 11 through the air inlet 111. Both the air outlet 112 and the air inlet 111 penetrate the housing 10 and face the indoor environment. An air guide 50 may be provided at the air outlet 112 to direct the airflow from the air outlet 112.

[0049] The fresh air duct 30 is disposed in the housing 10 and is configured to introduce outdoor fresh air.

[0050] The bypass duct 20 is provided in the housing 10 and is connected to the heat exchange duct 11, and is used to guide the airflow in the heat exchange duct 11 to the fresh air duct 30 and / or the outdoor environment. That is, in the first working mode, the bypass duct 20 only guides the airflow to the fresh air duct 30, such as Figure 3 In the second working mode, the bypass duct 20 only guides the airflow to the outdoor environment, such as Figure 4 In the third working mode, the bypass air duct 20 guides the air flow to the fresh air duct 30 and the outdoor environment.

[0051] The damper 25 is configured to controllably adjust the airflow distribution ratio from the bypass air duct 20 to the fresh air duct 30 and the outdoor environment, including adjusting the airflow volume directed to the fresh air duct 30 or the outdoor environment to zero.

[0052] The air conditioner of the embodiment of the present invention is provided with a fresh air duct 30 for introducing fresh air flow, thereby maintaining a fresh and healthy indoor environment. In addition, the present invention provides the air conditioner with more fresh air modes by connecting the fresh air duct 30 with the outdoor environment through a bypass air duct 20, thereby achieving a better fresh air supply effect.

[0053] For example Figure 3 As shown, during cooling / heating operation, the heat exchange airflow in the heat exchange duct 11 can be directed to the fresh air duct 30 to mix with the fresh air. This increases the temperature of the low-temperature fresh airflow during heating and decreases the temperature of the high-temperature fresh airflow during cooling, allowing the fresh airflow to flow into the indoor environment at a more comfortable temperature. Otherwise, if the colder outdoor fresh airflow is blown directly into the indoor environment during winter heating, it will impair the indoor heating effect and cause discomfort. If the hotter outdoor fresh airflow is blown directly into the indoor environment during summer cooling, it will impair the indoor cooling effect and the hot air will also affect the cooling experience.

[0054] For example Figure 4 As shown, when the air conditioner stops cooling / heating, the airflow in the heat exchange duct 11 (from the indoor environment) can be directed to the outdoor environment. At the same time, the fresh air duct 30 can be used to introduce outdoor fresh air to accelerate the exchange of indoor and outdoor air and the speed of indoor fresh air exchange.

[0055] Furthermore, the bypass duct 20 can be used to simultaneously direct the airflow from the heat exchange duct 11 to the fresh air duct 30 and the outdoor environment, thereby regulating the fresh air temperature and accelerating the fresh air exchange rate. In this operating mode, the air conditioner's cooling / heating functions are preferably turned off to avoid wasting cooling / heating capacity by directing the heat exchange airflow outdoors. Furthermore, the damper 25 can be used to adjust the ratio of airflow directed to the fresh air duct 30 and the outdoor environment. For example, when the difference between the outdoor and indoor temperatures is greater, more airflow will be directed to the fresh air duct 30.

[0056] In some embodiments, as Figure 3 and Figure 4 As shown, the bypass air duct 20 is a three-way pipe, having an air inlet channel 21, a first air outlet channel 22, and a second air outlet channel 23. The air inlet channel 21 is connected to the heat exchange air duct 11, the first air outlet channel 22 is connected to the fresh air duct 30, and the second air outlet channel 23 is connected to the exhaust pipe 82, which is connected to the outdoor environment. Specifically, the outlet end of the second air outlet channel 23 is connected to the exhaust port 231 of the housing 10, and the external exhaust pipe 82 is detachably connected to the exhaust port 231. The outlet end of the exhaust pipe 82 is connected to the outdoor environment.

[0057] like Figure 3 and Figure 4 As shown, one end of the damper 25 can be rotatably connected to the junction of the inlet end of the first air outlet channel 22 and the inlet end of the second air outlet channel 23 so as to be rotated to a first angle (such as Figure 4 ), or rotate to a second angle (such as Figure 3 ), or rotate to multiple adjustment angles between the first angle and the second angle ( Figure 3 and Figure 4 A motor 251 may be provided to drive the damper 25 to rotate.

[0058] In some embodiments, as Figure 3 As shown, the air conditioner further includes a heat exchanger 40 and a first fan 60. The heat exchanger 40 is disposed within the housing 10 and is configured to exchange heat with the airflow flowing therethrough, thereby forming the aforementioned heat exchange airflow. The heat exchanger 40 is the evaporator of a vapor compression refrigeration cycle system. The heat exchanger 40 can be disposed within or outside the heat exchange duct 11. The first fan 60 is disposed within the heat exchange duct 11 and is configured to blow the heat exchange airflow through the air outlet 112 into the indoor environment, thereby utilizing the heat exchange airflow to condition the indoor air.

[0059] In some embodiments, as Figure 3As shown, the air conditioner further includes a third fan 70. The third fan 70 is disposed within the bypass air duct 20, and its rotating shaft 71 is connected to the first fan 60, rotating with the first fan 60. This facilitates the flow of air within the bypass air duct 20, accelerating its flow to the fresh air duct 30 or the outdoor environment. Because the third fan 70 is connected to the first fan 60, a motor is not required, resulting in lower costs. The third fan 70 can be an axial flow fan.

[0060] Figure 5 yes Figure 3 Schematic diagram of the physical structure of the heat exchange duct 11 in the air conditioner shown. Figure 3 The heat exchange duct 11 is composed of Figure 5 The air duct wall 116 (or volute) shown is defined.

[0061] In some embodiments, as Figures 3 to 5 As shown, the first fan 60 can be a crossflow fan, and the heat exchange duct 11 can be a crossflow duct. An exhaust port 113 is provided at one axial end of the heat exchange duct 11, connected to the bypass duct 20, to inject airflow into the bypass duct 20. A support grille 1161 can be provided at the open end of the heat exchange duct 11 to mount and support the first fan 60. The rotating shaft 71 of the third fan 70 is connected to the axial end of the first fan 60 and is collinear with the rotating shaft of the first fan 60.

[0062] Because a crossflow fan draws air in and out radially, conventional crossflow ducts are closed at both axial ends and lack ventilation. This embodiment of the present invention opens the axial ends of the crossflow duct, achieving the effect of discharging air into the bypass duct 20. This is a novel and ingenious design. Furthermore, this design does not obstruct the radial air intake and outlet of the crossflow fan.

[0063] Figure 6 yes Figure 3 Schematic diagram of the physical structure of the first fan 60 in the air conditioner.

[0064] Furthermore, if Figure 6 As shown, the axial end of the first fan 60 (cross-flow fan) can be fixedly provided with at least one blade 62, which is used to blow the heat exchange airflow in the direction axially away from the first fan 60 when the first fan 60 is running, so that it flows into the bypass air duct 20. That is, when the first fan 60 rotates, the at least one blade 62 also rotates, exerting a force on the airflow. In other words, the at least one blade 62 also constitutes a small fan, so that the airflow in the inner cavity of the first fan 60 is acted on the bypass air duct 20. This design cleverly uses the normal rotation of the first fan 60 to achieve two-way air supply (radial and axial). Preferably, as Figure 6 As shown, the number of blades 62 is plural.

[0065] The first fan 60 includes a plurality of elongated crossflow blades 61 extending axially. These blades 61 are spaced apart circumferentially around the fan 60, and each axial end of the fan 60 includes an annular mounting ring 63. One end of each blade 62 is connected to the radially inner side of the mounting ring 63, while the other ends converge at the center of the mounting ring 63 and connect to a mounting shaft 64. The mounting shaft 64 is used to mount the first fan 60 to the heat exchange duct 11. It will be appreciated that a drive motor is connected to the upper end plate of the first fan 60.

[0066] like Figure 6 As shown, the blades 62 are preferably axial flow blades, so that the entire blades 62 constitute a small axial flow impeller. The air inlet and outlet of the axial flow impeller are parallel to the axial direction of the axial flow impeller, which is more conducive to sucking air out of the cylindrical chamber formed by each cross flow blade 61.

[0067] In some embodiments, reference Figure 2 and Figure 3 In a vertical air conditioner embodiment, the housing 10 may define a lower chamber 12 located below the heat exchange duct 11, with the bypass duct 20 and the fresh air duct 30 located within the lower chamber 12. In other words, the heat exchange duct 11 is positioned higher, allowing the air outlet 112 to be positioned higher, thereby delivering air farther and increasing the air delivery distance and angle.

[0068] In some embodiments, as Figure 1 and Figure 3 As shown, the fresh air duct 30 has a fresh air inlet 310 and a fresh air outlet 320. The fresh air inlet 310 is used to connect with the fresh air pipe 81 connected to the outdoor environment, and the fresh air outlet 320 is oriented towards the indoor environment to discharge fresh air.

[0069] Furthermore, the fresh air inlet 310 can be located at the rear side of the housing 10 to facilitate connection with the fresh air duct 81. The fresh air outlet 320 is located at the front side of the housing 10 to facilitate forward delivery of fresh air. In this embodiment, the fresh air duct 81 is designed as a separate component that can be detachably mounted on the housing 10, which can further facilitate the design, production, and transportation of the air conditioner.

[0070] In some embodiments, as Figure 3 As shown, the air conditioner may further include a second fan 90. The second fan 90 is disposed in the lower chamber 12 and is used to promote the flow of fresh air in the fresh air duct 30.

[0071] Further, if Figure 3As shown, the fresh air duct 30 may include an upstream section 31 and a downstream section 32. The inlet of the upstream section 31 constitutes the fresh air inlet 310, and the outlet is connected to the inlet of the second fan 90. The inlet of the downstream section 32 is connected to the outlet of the second fan 90, and the outlet constitutes the fresh air outlet 320. The bypass duct 20 is connected to the downstream section 32, and the airflow directions of the two sections form an acute angle. This prevents fresh air from flowing into the bypass duct 20, and also prevents the airflow in the bypass duct 20 from flowing into the fresh air in the reverse direction.

[0072] In this embodiment, the second fan 90 includes not only a rotor but also a housing for mounting the rotor, which has an inlet and an outlet. The second fan 90 can be a centrifugal fan with a vertically extending axis. The upstream section 31 is located below the second fan 90, and the downstream section 32 is located in front of the second fan 90. This embodiment divides the fresh air duct 30 into two sections, fully utilizing the height and depth of the lower chamber 12. Furthermore, the second fan 90 is located outside the fresh air duct 30, making it easier to install and remove, resulting in a very clever structure.

[0073] In some alternative embodiments, the fresh air duct 30 may be an integral structure, the second fan 90 may only include a wind wheel, and the second fan 90 may be disposed in the fresh air duct 30 .

[0074] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An air conditioner comprising: case; A heat exchange air duct is provided in the housing and has an air outlet for blowing the heat exchange airflow produced by the air conditioner into the indoor environment; A fresh air duct is provided in the housing for introducing fresh air from outside; a bypass air duct, disposed in the housing and connected to the heat exchange air duct, for directing the airflow in the heat exchange air duct to the fresh air duct and / or the outdoor environment; and an air damper configured to controllably adjust the airflow distribution ratio of the bypass air duct to the fresh air duct and the outdoor environment; The bypass air duct is a three-way pipe type, having an air inlet channel, a first air outlet channel, and a second air outlet channel. The air inlet channel is connected to the heat exchange air duct, the first air outlet channel is connected to the fresh air duct, and the second air outlet channel is connected to the exhaust pipe, and the exhaust pipe is connected to the outdoor environment. One end of the damper is rotatably connected to the junction of the inlet end of the first air outlet channel and the inlet end of the second air outlet channel, so as to be rotated to a first angle for closing the first air outlet channel, or to a second angle for closing the second air outlet channel, or to multiple adjustment angles between the first angle and the second angle.

2. The air conditioner according to claim 1, further comprising: a heat exchanger, disposed in the housing, for exchanging heat with the airflow flowing therethrough to form the heat exchange airflow; and The first fan is arranged in the heat exchange air duct to promote the heat exchange air flow to flow toward the air supply port.

3. The air conditioner according to claim 2, further comprising: The third fan is disposed in the bypass air duct, and its rotating shaft is connected to the first fan so as to rotate along with the first fan, so as to promote the flow of air in the bypass air duct.

4. The air conditioner according to claim 2, wherein The first fan is a cross-flow fan; The heat exchange air duct is a cross-flow air duct, and an exhaust port connected to the bypass air duct is opened at one axial end thereof to inject air flow into the bypass air duct; and At least one blade is fixedly provided at an axial end of the first fan, for blowing the airflow in a direction axially away from the first fan when the first fan is running, so that the airflow flows into the bypass air duct.

5. The air conditioner according to claim 1, wherein The air conditioner is a vertical air conditioner, the shell defines a lower chamber located below the heat exchange air duct, and the fresh air duct and the bypass air duct are located in the lower chamber.

6. The air conditioner according to claim 5, wherein The fresh air duct has a fresh air inlet and a fresh air outlet. The fresh air inlet is used to connect with the fresh air pipe connected to the outdoor environment, and the fresh air outlet is oriented towards the indoor environment to discharge fresh air.

7. The air conditioner according to claim 6, further comprising: A second fan is disposed in the lower chamber and is used to promote the flow of fresh air in the fresh air duct; and The fresh air duct includes an upstream section and a downstream section, the inlet of the upstream section constitutes the fresh air inlet, and the outlet is connected to the inlet of the second fan; the inlet of the downstream section is connected to the outlet of the second fan, and the outlet constitutes the fresh air outlet; The bypass air duct is connected to the downstream section, and the airflow directions of the two sections form an acute angle.

8. The air conditioner according to claim 7, wherein The second fan is a centrifugal fan with a vertically extending axis; and The upstream section is located below the second fan, and the downstream section is located in front of the second fan.

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