Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit, and belongs to the technical field of air conditioners. According to the air conditioner indoor unit, an air return opening and an air outlet are formed in a shell; the at least one fan is arranged in the shell and is close to the air return port; the indoor heat exchanger is arranged on the air outlet side of the fan; the air outlets comprise a first air outlet and a second air outlet; one end of the first air guide pipe communicates with the first air outlet, and the other end extends to the direction away from the shell; one end of the second air guide pipe communicates with the second air outlet, and the other end bends and extends to face the lower portion of the shell. The multiple different air outlets are formed to output refrigerating airflow or heating airflow, the air outlet directions of the air outlets are guided through the first air guide pipe and the second air guide pipe, and therefore the output direction of the heating airflow faces the lower portion of the shell, and the refrigerating airflow is output in the horizontal direction; therefore, the two airflows uniformly cover the whole room, and the comfort of a human body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to an air conditioner indoor unit. BACKGROUND

[0002] Air conditioner refers to air conditioner, which is a device for adjusting and controlling the temperature, humidity, flow rate and other parameters of the air in the environment of a building or structure by artificial means. Air conditioner usually includes indoor unit and outdoor unit.

[0003] At present, the air conditioner indoor unit usually includes a return air inlet and an air outlet, and the air duct structure is fixed. When the air conditioner indoor unit is used for cooling or heating, the cooling air flow is easy to sink compared with indoor air, and the heating air flow is easy to float compared with indoor air.

[0004] However, if the air outlet is set to horizontal air outlet, it is beneficial to the cooling air flow to blow from top to bottom in the room, so that the cooling air flow uniformly covers the room, while the heating air flow will float at the top of the room, which cannot achieve the effect of uniformly covering the room with the heating air flow. On the contrary, if the air outlet is set to downward air outlet, the effect of uniformly covering the room with the cooling air flow cannot be achieved.

[0005] Therefore, based on the above technical solution, there is inevitably a situation that the cooling air flow or the heating air flow is not easy to uniformly cover the entire room when cooling or heating, thereby reducing the comfort of the human body. CONTENT OF THE INVENTION

[0006] The present application provides an air conditioner indoor unit, which outputs cooling air flow or heating air flow through multiple different air outlets, and guides the air outlet direction of the first air outlet and the second air outlet through the first air guide pipe and the second air guide pipe, so that the output direction of the heating air flow is directed to the lower part of the shell, and the cooling air flow is output in the horizontal direction, thereby uniformly covering the entire room with the two air flows and improving the comfort of the human body.

[0007] In one aspect, an air conditioner indoor unit is provided, comprising:

[0008] A shell is provided with a return air inlet and an air outlet, and the return air inlet and the air outlet are distributed along the circumference of the shell;

[0009] At least one fan is arranged in the shell;

[0010] An indoor heat exchanger is arranged on the air outlet side of the fan and is used for exchanging heat with the air flow passing through it;

[0011] The air outlet comprises a first air outlet and a second air outlet, the first air outlet and the second air outlet are respectively arranged on two adjacent side walls of the shell, the first air outlet or the second air outlet is arranged on the side wall opposite to the leeward side of the indoor heat exchanger; or, the second air outlet and the first air outlet are arranged on the same side wall of the shell, and the same side wall is the side wall opposite to the leeward side of the indoor heat exchanger;

[0012] A first air valve is arranged between the indoor heat exchanger and the first air outlet, and is used for communicating or closing the first air outlet and the leeward side of the indoor heat exchanger;

[0013] A second air valve is arranged between the indoor heat exchanger and the second air outlet, and is used for communicating or closing the second air outlet and the leeward side of the indoor heat exchanger;

[0014] A first air guide pipe is communicated with the first air outlet at one end, and is extended to a direction away from the shell at the other end;

[0015] A second air guide pipe is communicated with the second air outlet at one end, and is curvedly extended to a direction below the shell at the other end;

[0016] When outputting a heating airflow, the first air valve is closed and the second air valve is opened, and the second air outlet outputs the heating airflow to the direction below the shell through the second air guide pipe; when outputting a cooling airflow, the second air valve is closed and the first air valve is opened, and the first air outlet outputs the cooling airflow to a horizontal direction away from the shell through the first air guide pipe.

[0017] In the air conditioner indoor unit of the present application, the first air outlet arranged on the front end face or the side end face of the shell cooperates with the first air guide pipe to output a cooling airflow to a horizontal direction, and the second air outlet arranged on the front end face or the side end face of the shell cooperates with the second air guide pipe to output a heating airflow to a direction below the shell, and the two airflows output by the same air conditioner indoor unit can cover the entire room, thereby improving the comfort of human body.

[0018] In some embodiments, the air outlet further comprises a third air outlet, the third air outlet is oppositely arranged on two adjacent side walls of the shell with the second air outlet, and the third air outlet and the second air outlet are close to each other and communicated to simultaneously output a heating airflow.

[0019] Based on the above technical solution, the third air outlet is used to strengthen the output amount of the heating airflow in the same time period, thereby increasing the heating efficiency.

[0020] In some embodiments, the air outlet further comprises a fourth air outlet, which is arranged on the bottom end surface of the shell, and the fourth air outlet is close to and communicates with the second air outlet to output the heating airflow at the same time.

[0021] Based on the above technical scheme, the fourth air outlet is used to strengthen the output of the heating airflow in the same time period, and the fourth air outlet directly outputs the heating airflow below the shell to increase the heating efficiency.

[0022] In some embodiments, the air outlet further comprises a fifth air outlet, which is arranged on the two side walls adjacent to the shell opposite to the first air outlet, and the fifth air outlet is close to and communicates with the first air outlet to output the cooling airflow at the same time.

[0023] Based on the above technical scheme, the fifth air outlet is used to strengthen the output of the cooling airflow in the same time period to increase the cooling efficiency.

[0024] In some embodiments, the first air valve is located between the indoor heat exchanger and the first air outlet and the fifth air outlet to simultaneously communicate or close the first air outlet, the fifth air outlet and the leeward side of the indoor heat exchanger.

[0025] Based on the above technical scheme, the first air valve is used to simultaneously control the air outlet or stop the air outlet of the first air outlet and the fifth air outlet, and no additional air valve is needed for each air outlet, thereby saving the manufacturing cost.

[0026] In some embodiments, the second air valve is located between the indoor heat exchanger and the second air outlet, the third air outlet and the fourth air outlet to simultaneously communicate or close the second air outlet, the third air outlet and the fourth air outlet and the leeward side of the indoor heat exchanger.

[0027] Based on the above technical scheme, the second air valve is used to simultaneously control the air outlet or stop the air outlet of the second air outlet, the third air outlet and the fourth air outlet, and no additional air valve is needed for each air outlet, thereby saving the manufacturing cost.

[0028] In some embodiments, the return air inlet is arranged on the side wall of the shell opposite to the windward side of the indoor heat exchanger.

[0029] Based on the above technical scheme, the return air inlet is arranged on the side wall of the shell opposite to the windward side of the indoor heat exchanger, which forms a good air circulation path relative to the first air outlet or the second air outlet at the other end of the shell, thereby ensuring that the cooling or heating airflow can flow rapidly in the indoor space to improve the working efficiency of the air conditioner.

[0030] In some embodiments, the return air inlet is arranged at a bottom end of the shell, and a preset interval is arranged between the return air inlet and the fourth air outlet.

[0031] According to the above technical solution, the preset interval is arranged to make the air inlet operation of the return air inlet and the air outlet operation of the fourth air outlet not interfere with each other, so as to avoid the immediate return flow of the output air flow to reduce the working efficiency of the air conditioner.

[0032] In some embodiments, the air conditioner indoor unit further comprises:

[0033] A first grid is arranged at the return air inlet, and a plurality of first grids are arranged parallel to each other, for guiding the air flow to return into the shell based on a first direction;

[0034] A second grid is arranged at the fourth air outlet, and a plurality of second grids are arranged parallel to each other, for guiding the air flow to flow out of the shell based on a second direction;

[0035] An included angle α between the first direction and the second direction satisfies: α≥30°, and α≤45°.

[0036] According to the above technical solution, the first grid and the second grid are arranged to guide the air inlet and the air outlet directions respectively, and the included angle between the two air directions is an acute angle, so as to ensure the ventilation volume and avoid the immediate return flow of the output air flow to reduce the working efficiency of the air conditioner.

[0037] On the other hand, an air conditioner indoor unit is also provided, comprising:

[0038] A shell is provided with a return air inlet and an air outlet, and the return air inlet and the air outlet are distributed along the circumference of the shell;

[0039] At least one fan is arranged in the shell;

[0040] An indoor heat exchanger is arranged on the air outlet side of the fan, for exchanging heat with the air flow passing through it;

[0041] The air outlet comprises a first air outlet and a second air outlet, the first air outlet and the second air outlet are arranged on two adjacent side walls of the shell respectively, and the first air outlet or the second air outlet is arranged on the side wall opposite to the leeward side of the indoor heat exchanger; or, the second air outlet and the first air outlet are arranged on the same side wall of the shell, and the same side wall is the side wall opposite to the leeward side of the indoor heat exchanger;

[0042] A first air valve is arranged between the indoor heat exchanger and the first air outlet, for communicating or closing the first air outlet and the leeward side of the indoor heat exchanger;

[0043] A second air valve is arranged between the indoor heat exchanger and the second air outlet, and is configured to communicate or close the second air outlet with the leeward side of the indoor heat exchanger.

[0044] A first air guide module is configured to guide the first air outlet to output the refrigeration airflow in a horizontal direction away from the shell.

[0045] A second air guide module is configured to guide the second air outlet to output the heating airflow below the shell.

[0046] When the heating airflow is output, the second air outlet outputs the heating airflow below the shell through the second air guide module by closing the first air valve and opening the second air valve; when the refrigeration airflow is output, the first air outlet outputs the refrigeration airflow in a horizontal direction away from the shell through the first air guide module by closing the second air valve and opening the first air valve.

[0047] According to the above technical solution, the first air guide module is configured to guide the refrigeration airflow to be output in a horizontal direction, and the second air guide module is configured to guide the heating airflow to be output below the shell, so that the refrigeration or heating airflow output by the air outlets at different positions can cover the entire room, thereby improving the comfort of the human body. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A first perspective view of an air conditioner indoor unit according to some embodiments is shown;

[0049] Figure 2 A front view of the air conditioner indoor unit according to some embodiments is shown; Figure 1

[0050] A rear view of the air conditioner indoor unit according to some embodiments is shown; Figure 3 Figure 1 A bottom view of the air conditioner indoor unit according to some embodiments is shown;

[0051] Figure 4 Figure 1 A second perspective view of the air conditioner indoor unit according to some embodiments is shown;

[0052] Figure 5 A front view of the air conditioner indoor unit according to some embodiments is shown;

[0053] Figure 6 A top view of the air conditioner indoor unit according to some embodiments is shown; Figure 5

[0054] A top view of the air conditioner indoor unit according to some embodiments is shown; Figure 7 Figure 5

[0055] Figure 8 ​​​​A third perspective view of the air conditioner indoor unit according to some embodiments is shown.

[0056] Figure 9 A front view of the air conditioner indoor unit according to some embodiments is shown. Figure 8

[0057] Figure 10 A top view of the air conditioner indoor unit according to some embodiments is shown. Figure 8

[0058] Figure 11 A fourth perspective view of the air conditioner indoor unit according to some embodiments is shown.

[0059] Figure 12 A fifth perspective view of the air conditioner indoor unit according to some embodiments is shown.

[0060] In the above figures, 100, housing; 101, first air outlet; 102, second air outlet; 103, third air outlet; 104, fourth air outlet; 105, fifth air outlet; 106, air return; 200, fan; 300, indoor heat exchanger; 400, first air valve; 500, second air valve; 600, first air duct; 700, second air duct. DETAILED DESCRIPTION

[0061] For the purpose of making the objects and embodiments of the present application more clear, the present application will be described in detail below with reference to the accompanying drawings of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0062] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0063] The terms "first", "second", "third", etc. are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0064] ​​In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements, the specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0065] In the present application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been adjusted and heat-exchanged.

[0066] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0067] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by heat-exchanging with a material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0068] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0069] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0070] The utility model provides a kind of air conditioner indoor unit, it is related to air conditioning technical field, below referring to attached Figures 1-12 Air conditioner indoor unit is described.

[0071] Reference is made to attached Figures 1 to 12 An air conditioner indoor unit includes a shell 100, the shell 100 is hollow inside and serves as the main structure of the air conditioner indoor unit, not only plays a protective role, but also realizes the reasonable guidance of air flow by opening a return air inlet 106 and an air outlet. The return air inlet 106 and the air outlet are distributed along the circumference of the shell 100.

[0072] Reference is made to attachedFigure 3 A return air inlet 106 is formed on the housing 100, and is used to receive indoor air as a starting point of air circulation.

[0073] The return air inlet 106 can avoid multiple holes in the ceiling and improve the appearance of decoration.

[0074] Referring to the accompanying drawings Figure 5 , Figure 7 , Figure 8 , Figure 10 An air conditioner indoor unit includes a fan 200. At least one fan 200 is arranged in the housing 100, and the fan 200 is arranged close to the return air inlet 106 to guide the airflow into the housing 100.

[0075] Referring to the accompanying drawings Figure 5 , Figure 7 , Figure 8 , Figure 10 An air conditioner indoor unit includes an indoor heat exchanger 300. The housing 100 also has an indoor heat exchanger 300, and the indoor heat exchanger 300 is located on the air outlet side of the fan 200.

[0076] The side of the indoor heat exchanger 300 facing the fan 200 is the windward side, and the side facing away from the fan 200 is the leeward side.

[0077] The indoor heat exchanger 300 is a temperature control component that adjusts the temperature of the airflow, and transfers the refrigeration or heating effect to the air through heat exchange, thereby exchanging heat with the airflow passing through it.

[0078] After the airflow entering the housing 100 from the return air inlet 106 is boosted by the fan 200, the airflow is blown from the air outlet side of the fan 200 to the indoor heat exchanger 300, and the indoor heat exchanger 300 reduces the temperature of the airflow by absorbing heat to form a cooling airflow.

[0079] Alternatively, after the airflow entering the housing 100 from the return air inlet 106 is boosted by the fan 200, the airflow is blown from the air outlet side of the fan 200 to the indoor heat exchanger 300, and the indoor heat exchanger 300 increases the temperature of the airflow by releasing heat to form a heating airflow.

[0080] Referring to the accompanying drawings Figure 5 , Figure 6 , Figure 8 , Figure 9 The air outlet formed on the housing 100 includes a first air outlet 101 and a second air outlet 102.

[0081] Referring to the accompanying drawings Figure 8 , Figure 9In some embodiments of the present application, the second air outlet 102 and the first air outlet 101 are arranged on the same side wall of the shell 100, and the same side wall is the side wall opposite to the leeward side of the indoor heat exchanger.

[0082] The air flow processed by the indoor heat exchanger is directly output through the first air outlet 101 and the second air outlet 102, which reduces the loss of air volume and is beneficial to air circulation.

[0083] In some embodiments of the present application, the first air outlet 101 and the second air outlet 102 are arranged on two adjacent side walls of the shell 100, and the first air outlet 101 or the second air outlet 102 is arranged on the side wall opposite to the leeward side of the indoor heat exchanger.

[0084] If the first air outlet 101 is arranged on the side wall opposite to the leeward side of the indoor heat exchanger, that is, the first air outlet 101 is arranged on the front end surface of the shell 100, then the second air outlet 102 is arranged on any one of the side walls on the left and right sides of the front end surface.

[0085] If the second air outlet 102 is arranged on the side wall opposite to the leeward side of the indoor heat exchanger, that is, the second air outlet 102 is arranged on the front end surface of the shell 100, then the first air outlet 101 is arranged on any one of the side walls on the left and right sides of the front end surface.

[0086] The first air outlet 101 is generally directed to the side away from the wall of the room or to the center of the room, and the refrigeration air flow output through the first air outlet 101 sinks at the middle or near the middle of the room. The first air outlet 101 is used to ensure that the refrigeration air flow output is uniformly distributed in the room.

[0087] The second air outlet 102 is generally directed to the side away from the wall of the room or to the center of the room, and the heating air flow output through the second air outlet 102 rises at the middle or near the middle of the room. The second air outlet 102 is used to ensure that the heating air flow output is uniformly distributed in the room.

[0088] Referring to the accompanying drawings Figure 8 In some embodiments of the present application, the air outlet further comprises a third air outlet 103, and the third air outlet 103 is arranged on the two adjacent side walls of the shell 100 opposite to the second air outlet 102.

[0089] The third air outlet 103 and the second air outlet 102 are close to each other and communicate with each other to output the heating air flow at the same time.

[0090] If the second air outlet 102 is arranged on the side wall opposite to the leeward side of the indoor heat exchanger, that is, the second air outlet 102 is arranged on the front end surface of the shell 100.

[0091] The third air outlet 103 is arranged on any one of the side walls on the left and right sides of the front end face, far from the first air outlet 101 and close to the second air outlet 102.

[0092] The third air outlet 103 is in communication with the second air outlet 102, and is used for simultaneously outputting the heating airflow, so as to increase the air volume of the heating airflow and increase the heating efficiency.

[0093] Reference is made to the accompanying drawings Figure 4 , Figure 8 , Figure 10 In some embodiments of the present application, the air outlet further comprises a fourth air outlet 104, which is arranged on the bottom end face of the shell 100.

[0094] The fourth air outlet 104 is close to and in communication with the second air outlet 102, and is used for simultaneously outputting the heating airflow.

[0095] The fourth air outlet 104 is in communication with the second air outlet 102, and is used for simultaneously outputting the heating airflow, so as to increase the air volume of the heating airflow and increase the heating efficiency.

[0096] In addition, based on the fourth air outlet 104 being arranged on the bottom end face of the shell 100, the heating airflow can be directly output to the lower side of the shell 100, so that the heating airflow rises from bottom to top to uniformly heat.

[0097] Reference is made to the accompanying drawings Figure 8 In some embodiments of the present application, the air outlet further comprises a fifth air outlet 105, which is arranged on the two side walls adjacent to the shell 100 and opposite to the first air outlet 101.

[0098] The fifth air outlet 105 is close to and in communication with the first air outlet 101, and is used for simultaneously outputting the cooling airflow.

[0099] If the first air outlet 101 is arranged on the side wall of the shell 100 opposite to the leeward side of the indoor heat exchanger, that is, the first air outlet 101 is arranged on the front end face of the shell 100.

[0100] The fifth air outlet 105 is arranged on any one of the side walls on the left and right sides of the front end face, far from the second air outlet 102 and close to the first air outlet 101.

[0101] The fifth air outlet 105 is in communication with the first air outlet 101, and is used for simultaneously outputting the cooling airflow, so as to increase the air volume of the cooling airflow and increase the cooling efficiency.

[0102] Reference is made to the accompanying drawings Figures 1 to 7 The air conditioner indoor unit comprises two first air guide pipes 600, which are arranged on the shell 100 at the positions of the first air outlet 101 and the fifth air outlet 105.

[0103] Two first air guide pipes 600 respectively communicate with the first air outlet 101 and the fifth air outlet 105, and extend horizontally away from the shell 100.

[0104] The first air guide pipes 600 are used to guide the first air outlet 101 and the fifth air outlet 105 to output the cold air horizontally.

[0105] Based on the different orientations of the first air outlet 101 and the fifth air outlet 105, the two first air guide pipes 600 extend in different directions.

[0106] If the first air outlet 101 is arranged on the side wall opposite to the back side of the indoor heat exchanger, i.e. on the front end surface of the shell 100.

[0107] The first air guide pipe 600 communicating with the first air outlet 101 extends horizontally away from the front surface of the shell 100 to the first preset position, so that the first air outlet 101 outputs air at the first preset position.

[0108] The fifth air outlet 105 is arranged on any one of the side walls on the left and right sides of the front end surface, which is away from the second air outlet 102 and close to the first air outlet 101.

[0109] The fifth air outlet 105 is oriented to the side surface of the shell 100 relative to the first air outlet 101, the first air guide pipe 600 communicating with the fifth air outlet 105 extends horizontally away from the side surface of the shell 100, and then bends to extend horizontally away from the front end surface of the shell 100 to the second preset position, so that the fifth air outlet 105 outputs air at the second preset position.

[0110] It should be noted that the installation environment of the air conditioner indoor unit does not always make the first air outlet 101 and the fifth air outlet 105 in the most suitable output position. In the installation environment of a larger room, the air conditioner indoor unit is always located close to the wall to match the installation of the air conditioner outdoor unit.

[0111] At this time, the output position of the first air outlet 101 is close to one end of the room and away from the other end, and the cooling effect is not good for the room far from the one end of the first air outlet 101, and the technical effect of uniform cooling cannot be achieved.

[0112] Therefore, by extending the output positions of the first air outlet 101 and the fifth air outlet 105 to the first preset position and the second preset position respectively through the first air guide pipe 600, the above technical problem of uneven cooling can be solved. The first preset position and the second preset position can be set to the middle position of the room according to the actual situation.

[0113] The first air duct 600 extends the output position of the first air outlet 101 and the fifth air outlet 105 to the middle of the room, so that the distance between the air outlet position and the two ends of the room is equal, thereby allowing the output cold air to sink evenly for cooling.

[0114] Reference Appendix Figures 1 to 7 An indoor unit of an air conditioner includes two second air ducts 700, which are respectively located at the second air outlet 102 and the third air outlet 103 on the outer casing 100.

[0115] One end of each of the two second air ducts 700 is connected to the second air outlet 102 and the third air outlet 103, and the other end is extended by bending toward the underside of the housing 100.

[0116] The second air duct 700 is used to guide the second air outlet 102 and the third air outlet 103 to output heating airflow downwards to the outer casing 100.

[0117] Because the second air outlet 102 and the third air outlet 103 have different orientations, the two second air ducts 700 extend in different directions.

[0118] Wherein, if the second air outlet 102 is located on the side wall of the outer shell 100 opposite to the leeward side of the indoor heat exchanger, that is, the second air outlet 102 is located on the front end face of the outer shell 100.

[0119] The second air duct 700, which connects to the second air outlet 102, extends horizontally away from the front end face of the outer casing 100, and then extends downward to the third preset position, so that the second air outlet 102 discharges air downward to the outer casing 100 at the third preset position.

[0120] The third air outlet 103 is located on either side wall of the front face, which is far from the first air outlet 101 and close to the second air outlet 102.

[0121] The third air outlet 103 is opposite to the side of the second air outlet 102 facing the outer casing 100. The second air guide pipe 700 connected to the third air outlet 103 extends horizontally away from the side of the outer casing 100, and then extends downward to the fourth preset position, so that the third air outlet 103 discharges air downward to the outer casing 100 at the fourth preset position.

[0122] In addition, since the fourth air outlet 104 faces downwards from the outer casing 100, the fourth air outlet 104 can be used to directly output heating airflow downwards from the outer casing 100.

[0123] The heating airflow is directly output to the bottom of the outer casing 100 through the fourth air outlet 104, eliminating the need for an additional second air duct 700 and saving manufacturing costs.

[0124] Based on the second air outlet 102, the third air outlet 103 and the fourth air outlet 104 together output the heating airflow downwardly to the shell 100, which increases the heating efficiency.

[0125] In some embodiments of the present application, the return air inlet 106 is arranged on the side wall of the shell 100 opposite to the windward side of the indoor heat exchanger 300.

[0126] Based on the first air outlet 101 and the second air outlet 102 arranged on the side wall of the shell 100 opposite to the leeward side of the indoor heat exchanger 300, the return air inlet 106 is oppositely arranged with the first air outlet 101 and the second air outlet 102, which can form an effective air circulation path.

[0127] The return air inlet 106 is responsible for absorbing the dirty air in the room, and the air outlet is responsible for sending the treated fresh air back to the room. Such a layout helps to ensure the effective circulation and circulation of indoor air, and improves the cooling or heating effect of the indoor air conditioner.

[0128] In some embodiments of the present application, a filter screen is arranged at the return air inlet 106.

[0129] Based on the fixed arrangement of the return air inlet 106 and the cooperation with the first air outlet 101, the second air outlet 102, the third air outlet 103 and the fourth air outlet 103, the air flow direction of the return air inlet 106 is fixed, and there is no reverse air flow, which can avoid the problem that the hair and dust accumulated on the filter screen at the return air inlet 106 are blown out.

[0130] In some embodiments of the present application, the first air duct communicates the return air inlet 106, the first air outlet 101 and the fifth air outlet 105.

[0131] The first air duct is used to ensure that the air flow entering the inside of the shell 100 through the return air inlet 106 can be smoothly transported to the first air outlet 101 and the fifth air outlet 105 after being cooled, so as to output the cooling airflow through the first air outlet 101 and the fifth air outlet 105.

[0132] The second air duct communicates the return air inlet 106, the second air outlet 102, the third air outlet 103 and the fourth air outlet 104.

[0133] The second air duct is used to ensure that the air flow entering the inside of the shell 100 through the return air inlet 106 can be smoothly transported to the second air outlet 102, the third air outlet 103 and the fourth air outlet 104 after being heated, so as to output the heating airflow through the second air outlet 102, the third air outlet 103 and the fourth air outlet 104.

[0134] Reference is made to the accompanying drawings Figure 5 , Figure 7 , Figure 8 , Figure 10The air conditioner indoor unit comprises a fan 200, at least one fan 200 is arranged in the shell 100, and the fan 200 is used for sending air to the first air duct, the second air duct. The airflow entering the inside of the shell 100 through the return air inlet 106 flows to the first air outlet 101, the second air outlet 102, the third air outlet 103, the fourth air outlet 104 and the fifth air outlet 105.

[0135] It should be noted that, considering the cooperation of one return air inlet 106 and multiple air outlets, in the case of high requirements for the air volume of the air outlet, one fan 200 is difficult to meet the air supply demand, therefore, the number of fans 200 should be set according to the actual situation.

[0136] Referring to the accompanying drawings Figure 5 、 Figure 7 、 Figure 8 、 Figure 10 In some embodiments of the present application, the number of fans 200 can be set to three, so as to increase the air supply volume of each air outlet and improve the air supply efficiency.

[0137] In some embodiments of the present application, the fan 200 is a cross-flow fan 200 or a centrifugal fan 200.

[0138] The cross-flow fan 200 has the advantages of low noise and high air volume, and is usually suitable for occasions requiring quietness and high air volume requirements.

[0139] The cross-flow fan 200 can generate relatively uniform airflow, so that the temperature of each area in the room is more balanced, and the comfort is improved.

[0140] The cross-flow fan 200 is designed to reduce noise, and multiple cross-flow fans 200 can also maintain a low noise level when working simultaneously, providing a quiet environment for users.

[0141] The centrifugal fan 200 has strong airflow driving capacity and stability, and is usually suitable for occasions requiring rapid and efficient air delivery.

[0142] The centrifugal fan 200 can rapidly deliver processed air to each corner of the room, ensuring rapid adjustment of indoor temperature and humidity.

[0143] The centrifugal fan 200 can maintain the stability of the airflow during operation, avoiding the influence of airflow fluctuation on the air conditioning effect.

[0144] It should be noted that, based on the setting of multiple numbers of fans 200, the cross-flow fan 200 and the centrifugal fan 200 can be mixed and arranged in the shell 100, so as to flexibly adjust the working state of the cross-flow fan 200 and the centrifugal fan 200 according to the indoor environment and user demand, and realize customized air supply.

[0145] When rapid cooling or heating is required, the power of the centrifugal fan 200 can be increased; when it is required to keep the room quiet, the cross-flow fan 200 can be relied on more.

[0146] Referring to the accompanying drawings Figures 5 to 10 The air conditioner indoor unit includes a first air valve 400, which is arranged in the first air duct and located between the indoor heat exchanger 300 and the first air outlet 101 and the fifth air outlet 105.

[0147] The first air valve 400 is used to simultaneously communicate or close the first air outlet 101, the fifth air outlet 105, and the leeward side of the indoor heat exchanger 300, so as to adjust the air flow direction in cooperation with the working mode of the indoor heat exchanger 300.

[0148] It should be noted that if the first air outlet 101 is arranged on the side wall opposite to the leeward side of the indoor heat exchanger of the shell 100, i.e., the first air outlet 101 is arranged on the front end face of the shell 100.

[0149] The first air outlet 101 faces the front end face of the shell 100, and the first air outlet 101 is fixed for horizontally outputting the refrigeration air flow away from the front direction of the shell 100.

[0150] The fifth air outlet 105 faces the side face of the shell 100, and the fifth air outlet 105 is fixed for horizontally outputting the refrigeration air flow away from the side direction of the shell 100.

[0151] Therefore, the first air valve 400 is set to be opened in the refrigeration mode of the indoor heat exchanger 300 by the independent first air valve 400 controller, so as to output the refrigeration air flow through the first air outlet 101 and the fifth air outlet 105.

[0152] On the contrary, when the indoor heat exchanger 300 is in the heating mode, the first air valve 400 is closed at this time. To avoid outputting the heating air flow through the first air outlet 101 and the fifth air outlet 105, so as to avoid the excessive heating air flow gathered at the top of the room, which causes the local air temperature to be too high, resulting in poor user experience.

[0153] Referring to the accompanying drawings Figure 5 、 Figure 7 、 Figure 8 、 Figure 10 The air conditioner indoor unit includes a second air valve 500, which is arranged in the second air duct and located between the indoor heat exchanger 300 and the second air outlet 102, the third air outlet 103, and the fourth air outlet 104.

[0154] The second air valve 500 is used to simultaneously communicate or close the second air outlet 102, the third air outlet 103 and the fourth air outlet 104 with the leeward side of the indoor heat exchanger 300, so as to adjust the air flow direction in cooperation with the working mode of the indoor heat exchanger 300.

[0155] It should be noted that if the second air outlet 102 is arranged on the side wall of the shell 100 opposite to the leeward side of the indoor heat exchanger, that is, the second air outlet 102 is arranged on the front end face of the shell 100.

[0156] The second air outlet 102 faces the front end face of the shell 100, and the second air outlet 102 is fixed for outputting the heating air flow to the lower part of the shell 100 in cooperation with the second air guide pipe 700.

[0157] The third air outlet 103 faces the side face of the shell 100, and the third air outlet 103 is fixed for outputting the heating air flow to the lower part of the shell 100 in cooperation with the second air guide pipe 700.

[0158] The fourth air outlet 104 faces the lower face of the shell 100, and the fourth air outlet 104 is fixed for outputting the heating air flow to the lower part of the shell 100.

[0159] Therefore, the second air valve 500 is set to be opened in the heating mode of the indoor heat exchanger 300 by the independent second air valve 500 controller, so as to output the heating air flow through the second air outlet 102, the third air outlet 103 and the fourth air outlet 104.

[0160] On the contrary, when the indoor heat exchanger 300 is in the cooling mode, the second air valve 500 is closed at this time. In order to avoid outputting the cooling air flow through the second air outlet 102, the third air outlet 103 and the fourth air outlet 104, so as to avoid the excessive cooling air flow gathered at the bottom of the room, resulting in the local air temperature being too low, which makes the user experience poor.

[0161] In some embodiments of the present application, the first air outlet 101, the fifth air outlet 105 and the first air valve 400 are integrally arranged, so as to facilitate installation.

[0162] The second air outlet 102, the third air outlet 103 and the fourth air outlet 104 are integrally arranged with the second air valve 500, so as to facilitate installation.

[0163] Referring to the accompanying drawings Figures 10 to 12 The first air valve 400 and the second air valve 500 can adopt circular, rectangular and other shapes based on different actual conditions.

[0164] In some embodiments of the present application, the air outlet size area of any air outlet or any air valve is designed according to the air volume, so that the average air speed Z1 of the airflow satisfies: Z1≥1.0m / s, Z1≤4.0m / s.

[0165] By limiting the average air speed of the airflow at any air outlet or any air valve, the airflow can be more evenly distributed to various areas in the room, avoiding the situation that the airflow is too strong or too weak in local areas. To improve the comfort of the indoor environment and reduce the discomfort caused by uneven airflow distribution.

[0166] In some embodiments of the present application, the air outlet size area of any air outlet or any air valve is designed according to the air volume, so that the average air speed Z2 of the airflow satisfies: Z2≥1.5m / s, Z2≤2.5m / s.

[0167] By limiting the average air speed of the airflow at any air outlet or any air valve, the noise generated by the air conditioning system during operation is effectively reduced, providing a more quiet and comfortable environment for indoor personnel.

[0168] Low wind speed may result in insufficient heat exchange, while high wind speed may increase energy loss and noise. By limiting the wind speed, the performance of the heat exchanger can be optimized, and the energy utilization efficiency can be improved.

[0169] When the air conditioner indoor unit is used for refrigeration work, the airflow enters the shell 100 through the return air inlet 106. The airflow entering the shell 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange, and the airflow cooled by the indoor heat exchanger 300 enters the first air duct and the second air duct.

[0170] At this time, the first air valve 400 and the second air valve 500 cooperate with the refrigeration work of the indoor heat exchanger 300 by switching. Among them, the first air valve 400 is opened, and the second air valve 500 is closed.

[0171] The cooled airflow enters the first air duct and the second air duct, but can only pass through the first air duct to output refrigeration airflow from the first air outlet 101 and the fifth air outlet 105 to the horizontal direction away from the shell 100. The refrigeration airflow gradually subsides from top to bottom in the room to achieve the technical effect of uniform refrigeration.

[0172] When the air conditioner indoor unit is used for heating work, the airflow enters the shell 100 through the return air inlet 106. The airflow entering the shell 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange, and the airflow heated by the indoor heat exchanger 300 enters the first air duct and the second air duct.

[0173] At this time, the first air valve 400 and the second air valve 500 cooperate to open the indoor heat exchanger 300 for heating. Among them, the first air valve 400 is closed, and the second air valve 500 is opened.

[0174] The airflow after being heated enters the first air duct and the second air duct, but can only pass through the second air duct to output the heating airflow to the lower part of the shell 100 from the second air outlet 102, the third air outlet 103 and the fourth air outlet 104. The heating airflow heats the air in the room from bottom to top, achieving the technical effect of uniform heating.

[0175] In some embodiments of the present application, the ratio X1 of the air outlet area of the first air outlet 101, the second air outlet 102, the third air outlet 103, the fourth air outlet 104 and the fifth air outlet 105 to the working area of the indoor heat exchanger 300 satisfies: X1≥0.3, X1≤0.8.

[0176] The air outlet area of the first air outlet 101, the second air outlet 102, the third air outlet 103, the fourth air outlet 104 and the fifth air outlet 105 is essentially the product of the length dimension and the width dimension of each air outlet.

[0177] The working area of the indoor heat exchanger 300 is essentially the surface area of heat transfer between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0178] By limiting the ratio of the above two, it is ensured that the size of the air outlet matches the heat exchange capacity of the indoor heat exchanger 300. The air passing through the indoor heat exchanger 300 can fully absorb or release heat, and then be sent out after reaching the ideal temperature, thereby improving the heat exchange efficiency.

[0179] And / or, the ratio Y1 of the size area of the air outlet of the first air valve 400 and the second air valve 500 to the working area of the heat exchanger satisfies: Y1≥0.3, Y1≤0.8.

[0180] The size area of the air outlet of the first air valve 400 and the second air valve 500 is essentially the product of the length dimension and the width dimension of the air outlet controlled by each air valve.

[0181] The working area of the indoor heat exchanger 300 is essentially the surface area of heat transfer between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0182] By limiting the ratio of the above two, the failure rate caused by poor airflow or insufficient heat exchange is reduced. Any air valve can flexibly adjust the air supply and temperature according to actual needs, improving the response speed and adaptability.

[0183] In some embodiments of the present application,

[0184] The position of the return air inlet 106 is arranged at the bottom end surface of the shell 100, and a preset interval is arranged between the return air inlet 106 and the fourth air outlet 104.

[0185] The return air inlet 106 is arranged at the bottom end of the shell 100, which provides more options for the installation of the indoor air conditioner. When the rear end surface of the outdoor shell 100 is used for installation, the return air inlet 106 arranged at the rear end surface of the shell 100 is also needed for return air, which results in too small air volume of the return air.

[0186] The return air inlet 106 and the fourth air outlet 104 are both arranged at the bottom end of the shell 100, and the return air of the return air inlet 106 and the air outlet of the fourth air outlet 104 cause short circuit. That is, the heating airflow of the fourth air outlet 104 is not used for output to the indoor preset position for heating, but is immediately sent back to the shell 100 by the return air inlet 106 for reprocessing, which reduces the heating efficiency.

[0187] By arranging a preset interval between the return air inlet 106 and the fourth air outlet 104, the return air path of the return air inlet 106 and the air outlet path of the fourth air outlet 104 are separated by a certain interval, which avoids mutual influence, thereby solving the problem of low heating efficiency.

[0188] By arranging the position of the return air inlet 106 at the bottom end of the shell 100 and arranging a preset interval between the return air inlet 106 and the fourth air outlet 104, the installation flexibility of the indoor air conditioner is improved, and the technical effect of ensuring the heating efficiency is also ensured.

[0189] In some embodiments of the present application, a plurality of first grid bars are arranged at the return air inlet 106 for guiding the airflow to flow back into the shell 100 based on a first direction.

[0190] A plurality of first grid bars are arranged at the return air inlet 106 to form a first air guide grid, and the first air guide grid is used to guide the airflow entering the shell 100 from the return air inlet 106 to flow back based on a first direction. That is, the flow direction of the backflowing airflow is controlled and guided.

[0191] A plurality of second grid bars are arranged at the fourth air outlet 104 for guiding the airflow to flow out of the shell 100 based on a second direction.

[0192] A plurality of second grid bars are arranged at the return air inlet 106 to form a second air guide grid, and the second air guide grid is used to guide the airflow output from the shell 100 from the fourth air outlet 104 to flow out based on a second direction. That is, the flow direction of the output airflow is controlled and guided.

[0193] The included angle between the first direction and the second direction is an acute angle.

[0194] By staggering the flow direction of the return air flow and the output air flow, the output air and the return air are prevented from short-circuiting.

[0195] In addition, the greater the angle between the first direction and the second direction, the smaller the output air volume and the return air volume. By limiting the angle between the flow directions of the two to an acute angle, it is ensured that the return air volume and the output air volume can meet the demand.

[0196] In some embodiments of the present application, the angle α between the first direction and the second direction satisfies: α≥30°, α≤45°.

[0197] The smaller the angle between the first direction and the second direction, the more likely the output air path and the return air path will affect each other, causing the output air and the return air to short-circuit.

[0198] Therefore, on the basis of ensuring that the output air volume and the return air volume can meet the demand, limiting the angle between the first direction and the second direction to a range of 30° to 45° can also achieve the technical effect of preventing the output air and the return air from short-circuiting.

[0199] In some embodiments of the present application, the first grid bars provided at the return air outlet 106 and the second grid bars provided at the fourth air outlet 104 are integrally arranged to form a third air guide grid. When installed, the third air guide grid can be directly installed at the bottom of the shell 100.

[0200] Based on the different air guide directions of the first grid bars and the second grid bars on the third air guide grid, the output air and the return air can be prevented from short-circuiting.

[0201] In other embodiments of the present application,

[0202] The ratio X2 of the air outlet area of the first air outlet 101, the second air outlet 102, the third air outlet 103, the fourth air outlet 104 and the fifth air outlet 105 to the working area of the heat exchanger satisfies: X2≥0.4, X2≤0.6.

[0203] The working area of the indoor heat exchanger 300 is essentially the surface area of heat transfer between the indoor heat exchanger 300 and the air flow when the air flow passes through the indoor heat exchanger 300.

[0204] By limiting the ratio of the above two, it is ensured that the size of the air outlet is matched with the heat exchange capacity of the indoor heat exchanger 300. The air passing through the indoor heat exchanger 300 can fully absorb or release heat, and then be sent out after reaching the ideal temperature, thereby improving the heat exchange efficiency.

[0205] And / or, the ratio Y2 of the size area of the air outlet of the first air valve 400 and the second air valve 500 to the effective working area of the heat exchanger satisfies: Y2≥0.4, Y2≤0.6.

[0206] The size area of the air inlets of the first air valve 400 and the second air valve 500 is substantially the product of the length dimension and the width dimension of the air inlets controlled by the respective air valves.

[0207] The working area of the indoor heat exchanger 300 is substantially the surface area of heat transfer between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0208] By limiting the ratio of the two, the failure rate caused by poor airflow or insufficient heat exchange is reduced. Any air valve can flexibly adjust the air supply and temperature according to actual needs, improving response speed and adaptability.

[0209] In some other embodiments of the present application,

[0210] An air conditioner indoor unit includes a first air guide module and a second air guide module.

[0211] The first air guide module is used to guide the first air outlet 101 and the fifth air outlet 105 to output cooling airflow in the horizontal direction.

[0212] Based on the fact that the first air outlet 101 is opened on the front end surface of the shell 100, the first air guide module communicates with the first air outlet 101 to guide the cooling airflow output by the first air outlet 101 to output horizontally away from the front of the shell 100. This makes the cooling airflow gradually sink from top to bottom to uniformly cool.

[0213] Based on the fact that the fifth air outlet 105 is opened on the side end surface of the shell 100, the first air guide module communicates with the fifth air outlet 105 to guide the fifth air outlet 105 to extend away from the side of the shell 100 and then extend away from the front of the shell 100. This makes the output cooling airflow gradually sink from top to bottom to uniformly cool.

[0214] The second air guide module is used to guide the second air outlet 102 and the third air outlet 103 to output heating airflow below the shell 100.

[0215] Based on the fact that the second air outlet 102 is opened on the front end surface of the shell 100, the second air guide module communicates with the second air outlet 102 to guide the second air outlet 102 to extend away from the front of the shell 100 and then bend and extend away from the bottom of the shell 100. This makes the heating airflow gradually rise from bottom to top to uniformly heat.

[0216] Based on the fact that the third air outlet 103 is opened on the side end surface of the shell 100, the second air guide module communicates with the third air outlet 103 to guide the third air outlet 103 to extend away from the side of the shell 100 and then bend and extend away from the bottom of the shell 100. This makes the output heating airflow gradually sink from top to bottom to uniformly heat.

[0217] When the air conditioner indoor unit is used for refrigeration, the air flow enters the shell 100 through the return air inlet 106. The air flow entering the shell 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange, and the air flow cooled by the indoor heat exchanger 300 enters the first air duct and the second air duct.

[0218] At this time, the first air valve 400 and the second air valve 500 are switched to cooperate with the refrigeration work of the indoor heat exchanger 300. Among them, the first air valve 400 is opened, and the second air valve 500 is closed.

[0219] The cooled air flow enters the first air duct and the second air duct, but can only pass through the first air duct and be guided based on the first air guide module, and output the refrigeration air flow to the horizontal direction away from the shell 100 from the first air outlet 101 and the fifth air outlet 105. The refrigeration air flow gradually sinks in the room from top to bottom to achieve the technical effect of uniform refrigeration.

[0220] When the air conditioner indoor unit is used for heating, the air flow enters the shell 100 through the return air inlet 106. The air flow entering the shell 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange, and the air flow heated by the indoor heat exchanger 300 enters the first air duct and the second air duct.

[0221] At this time, the first air valve 400 and the second air valve 500 are switched to cooperate with the heating work of the indoor heat exchanger 300. Among them, the first air valve 400 is closed, and the second air valve 500 is opened.

[0222] The heated air flow enters the first air duct and the second air duct, but can only pass through the second air duct and be guided based on the second air guide module, and output the heating air flow to the lower part of the shell 100 from the second air outlet 102, the third air outlet 103 and the fourth air outlet 104. The heating air flow gradually rises in the room from bottom to top to heat the air, achieving the technical effect of uniform heating.

[0223] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0224] For the sake of explanation, the foregoing descriptions have been presented in terms of specific embodiments. However, it is to be appreciated that specific embodiments described herein are not intended to limit the scope of the present application, which is defined with reference to the following claims. Various modifications and changes can be made thereto by those skilled in the art which fall within the scope of the present application as defined by the following claims. The embodiments were chosen and described in order to explain the principles of the application and the practical application and to enable others skilled in the art to understand for implementing various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The outer casing has a return air inlet and an air outlet, which are distributed circumferentially along the outer casing. A fan, at least one of the fans is disposed within the housing; An indoor heat exchanger is located on the air outlet side of the fan and is used to exchange heat with the airflow passing through it. The air outlet includes a first air outlet and a second air outlet. The first air outlet and the second air outlet are respectively disposed on two adjacent side walls of the outer shell. Either the first air outlet or the second air outlet is disposed on the side wall of the outer shell opposite to the leeward side of the indoor heat exchanger; or, the second air outlet and the first air outlet are disposed on the same side wall of the outer shell, and the same side wall is the side wall of the outer shell opposite to the leeward side of the indoor heat exchanger. A first air valve is located between the indoor heat exchanger and the first air outlet, and is used to connect or close the first air outlet to the leeward side of the indoor heat exchanger. The second air valve is located between the indoor heat exchanger and the second air outlet, and is used to connect or close the second air outlet to the leeward side of the indoor heat exchanger. A first air duct, one end of which is connected to the first air outlet, and the other end of which extends toward a direction away from the outer casing; The second air duct has one end connected to the second air outlet, and the other end extends in a bent manner toward the lower part of the outer casing; When outputting heating airflow, by closing the first air valve and opening the second air valve, the second air outlet outputs heating airflow downwards from the outer casing through the second air duct; when outputting cooling airflow, by closing the second air valve and opening the first air valve, the first air outlet outputs cooling airflow in a horizontal direction away from the outer casing through the first air duct.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The air outlet also includes a third air outlet, which is located opposite to the second air outlet on two adjacent side walls of the outer casing. The third air outlet and the second air outlet are close to each other and connected to each other so as to output heating airflow simultaneously.

3. The indoor unit of the air conditioner according to any one of claims 1 or 2, characterized in that, The air outlet also includes a fourth air outlet, which is located on the bottom surface of the housing. The fourth air outlet is close to and connected to the second air outlet to simultaneously output heating airflow.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The air outlet also includes a fifth air outlet, which is located on the adjacent side walls of the outer casing opposite to the first air outlet. The fifth air outlet and the first air outlet are close to each other and connected to each other so as to output cooling airflow simultaneously.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The first air valve is located between the indoor heat exchanger and the first air outlet and the fifth air outlet, and is used to simultaneously connect or close the first air outlet, the fifth air outlet and the leeward side of the indoor heat exchanger.

6. The indoor unit of the air conditioner according to claim 3, characterized in that, The second air valve is located between the indoor heat exchanger and the second, third, and fourth air outlets, and is used to simultaneously connect or close the second, third, and fourth air outlets to the leeward side of the indoor heat exchanger.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The return air vent is located on the side wall of the outer casing opposite to the windward side of the indoor heat exchanger.

8. The indoor unit of the air conditioner according to claim 3, characterized in that, The return air vent is located on the bottom surface of the outer casing, and a preset distance is provided between the return air vent and the fourth air outlet.

9. The indoor unit of the air conditioner according to claim 5, characterized in that, Also includes: The first grid bar, and a plurality of the first grid bars are arranged at the return air inlet, for guiding airflow back into the outer casing in a first direction; The second grille, and a plurality of the second grilles are arranged at the fourth air outlet, for guiding airflow out of the outer casing in a second direction; The angle α between the first direction and the second direction satisfies: α ≥ 30°, α ≤ 45°.

10. An indoor unit for an air conditioner, characterized in that, include: The outer casing has a return air inlet and an air outlet, which are distributed circumferentially along the outer casing. A fan, at least one of the fans is disposed within the housing; An indoor heat exchanger is located on the air outlet side of the fan and is used to exchange heat with the airflow passing through it. The air outlet includes a first air outlet and a second air outlet. The first air outlet and the second air outlet are respectively disposed on two adjacent side walls of the outer shell. Either the first air outlet or the second air outlet is disposed on the side wall of the outer shell opposite to the leeward side of the indoor heat exchanger; or, the second air outlet and the first air outlet are disposed on the same side wall of the outer shell, and the same side wall is the side wall of the outer shell opposite to the leeward side of the indoor heat exchanger. A first air valve is located between the indoor heat exchanger and the first air outlet, and is used to connect or close the first air outlet to the leeward side of the indoor heat exchanger. The second air valve is located between the indoor heat exchanger and the second air outlet, and is used to connect or close the second air outlet to the leeward side of the indoor heat exchanger. The first air guide module is used to guide the first air outlet to output cooling airflow in a horizontal direction away from the outer casing; The second air guide module is used to guide the second air outlet to output heating airflow downwards from the outer casing; When outputting heating airflow, by closing the first air valve and opening the second air valve, the second air outlet outputs heating airflow downwards from the outer casing through the second air guide module; when outputting cooling airflow, by closing the second air valve and opening the first air valve, the first air outlet outputs cooling airflow in a horizontal direction away from the outer casing through the first air guide module.

Images