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 the first air outlet and the second air outlet, the first air outlet and the second air outlet are formed in the two adjacent side walls of the shell correspondingly, and the first air outlet is formed in the side wall, opposite to the leeward side of the indoor heat exchanger, of the shell. One end of the first air guide pipe communicates with the second air outlet, and the other end of the first air guide pipe bends and extends to face the lower portion of the shell and is used for guiding the second air outlet to output heating air flow to the lower portion of the shell; the multiple different air outlets are formed to output refrigeration airflow or heating airflow, the air outlet directions of part of the air outlets are guided through the first air guide pipe, and therefore the output direction of the heating airflow faces the lower portion of the shell, the two kinds of airflow evenly cover the whole room, and the comfort of a human body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner indoor unit. BACKGROUND

[0002] Air conditioner refers to the device for adjusting and controlling the parameters of air in the environment of buildings or structures, such as temperature, humidity, and flow rate. Air conditioner usually includes indoor unit and outdoor unit.

[0003] At present, the air conditioner indoor unit usually includes one return air inlet and one 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. On the contrary, if the air outlet is set to downward air outlet, the effect of uniformly covering the room by 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 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 part of the air outlets through a first 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 by the two air flows and improving the comfort of human body.

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

[0008] A shell is provided, and a return air inlet and an air outlet are arranged on the shell, 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, and the fan is arranged close to the return air inlet;

[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 includes a first air outlet and a second air outlet, and 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 is arranged on the side wall of the shell opposite to the leeward side of the indoor heat exchanger;

[0012] A first air valve is arranged on the first air outlet and used to open or close the first air outlet.

[0013] A second air valve is arranged on the second air outlet and used to open or close the second air outlet.

[0014] A first air guide pipe is arranged on the second air outlet and extends to the lower side of the shell through bending, and is used to guide the second air outlet to output the heating airflow to the lower side of the shell.

[0015] When the heating airflow is output, the second air outlet outputs the heating airflow to the lower side of the shell through the first air guide pipe by closing the first air valve and opening the second air valve; when the cooling airflow is output, the cooling airflow is output to the horizontal direction away from the shell through the first air outlet by closing the second air valve and opening the first air valve.

[0016] In the air conditioner indoor unit, the first air outlet arranged on the front end of the shell is used to output the cooling airflow to the horizontal direction, and the second air outlet arranged on the side end surface of the shell and the first air guide pipe are used to output the heating airflow to the lower side of the shell, so that the two airflows output by the same air conditioner indoor unit can cover the entire room, thereby improving the comfort of the human body.

[0017] In some embodiments, the air conditioner indoor unit further comprises:

[0018] A third air outlet is arranged on the bottom end surface of the shell and used to output the heating airflow to the lower side of the shell.

[0019] Based on the above technical solution, the third air outlet is used to output the heating airflow to the lower side of the shell, thereby improving the heating efficiency.

[0020] In some embodiments, the air conditioner indoor unit further comprises:

[0021] A third air valve is arranged on the third air outlet and used to open or close the third air outlet.

[0022] Based on the above technical solution, the third air valve is used to control the opening or closing of the third air outlet, so as to control the air outlet in cooperation with the first air valve and the second air valve.

[0023] 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.

[0024] Based on the above technical solution, the return air inlet is arranged on the rear end surface of the shell opposite to the first air outlet, thereby forming a good air circulation path and ensuring that the cooling or heating airflow can flow rapidly in the indoor space, thereby improving the working efficiency of the air conditioner.

[0025] In some embodiments, the return air inlet is arranged at a bottom end surface of the shell, and a preset interval is arranged between the return air inlet and the third air outlet.

[0026] 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 third 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.

[0027] In some embodiments, the air conditioner indoor unit further comprises: a plurality of first grid bars arranged at the return air inlet for guiding the air flow to return into the shell based on a first direction; a plurality of second grid bars arranged at the third air outlet for guiding the air flow to flow out of the shell based on a second direction; and an included angle between the first direction and the second direction is an acute angle.

[0028] According to the above technical solution, the first grid bar and the second grid bar are arranged to guide the air inlet direction and the air outlet direction respectively, and the included angle of 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.

[0029] In some embodiments, an included angle α between the first direction and the second direction satisfies: α≥30°, α≤45°.

[0030] According to the above technical solution, the included angle between the first direction and the second direction is arranged to make the included angle take a value to ensure sufficient ventilation volume and avoid the immediate return flow of the output air flow to reduce the working efficiency of the air conditioner.

[0031] In some embodiments, a ratio X1 of an air outlet area of the first air outlet, the second air outlet and the third air outlet to a working area of the indoor heat exchanger satisfies: X1≥0.3, X1≤0.8.

[0032] And / or, a ratio Y1 of a size area of an air inlet of the first air valve, the second air valve and the third air valve to the working area of the indoor heat exchanger satisfies: Y1≥0.3, Y1≤0.8.

[0033] According to the above technical solution, the ratio of the air outlet area of the air outlet or the air valve air inlet to the working area of the indoor heat exchanger is limited to optimize the air flow and heat exchange efficiency.

[0034] In some embodiments, a ratio X2 of an air outlet area of the first air outlet, the second air outlet and the third air outlet to a working area of the indoor heat exchanger satisfies: X2≥0.4, X2≤0.6.

[0035] And / or, the ratio Y2 of the size area of ​​the air outlet of the first air valve, the second air valve and the third air valve to the working area of ​​the indoor heat exchanger, wherein the ratio Y2 satisfies: Y2≥0.4, Y2≤0.6.

[0036] Based on the above technical solution, the airflow and heat exchange efficiency are optimized by limiting the ratio of the air outlet or air valve outlet area to the working area of ​​the indoor heat exchanger.

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

[0038] The outer casing has a return air inlet and an air outlet, which are distributed circumferentially along the outer casing.

[0039] At least one of the fans is disposed inside the housing, and the fans are positioned near the return air vent.

[0040] 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.

[0041] The air outlet includes a first air outlet and a second air outlet. The first air outlet and the second air outlet are respectively located on the adjacent side walls of the outer shell. The first air outlet is located on the side wall of the outer shell opposite to the leeward side of the indoor heat exchanger.

[0042] The first air valve is located on the first air outlet and is used to open or close the first air outlet.

[0043] The second air valve is located on the second air outlet and is used to open or close the second air outlet.

[0044] The air guide module is used to direct the heating airflow downwards and outwards from the outer casing;

[0045] When outputting heating airflow, by closing the first air valve and opening the second air valve, the second air outlet outputs heating airflow to the lower part of the outer casing through the air guide module; when outputting cooling airflow, by closing the second air valve and opening the first air valve, cooling airflow is output to the horizontal direction away from the outer casing through the first air outlet.

[0046] Based on the above technical solution, the air guide module guides the heating airflow to the bottom of the shell, which is more inclusive of the specific setting position of the second air outlet, and the heating airflow output by the second air outlet with different opening positions can cover the entire room, improving human comfort. Attached Figure Description

[0047] Figure 1 A first perspective view of an indoor air conditioning unit according to some embodiments is shown;

[0048] Figure 2 An air conditioner indoor unit according to some embodiments is shown. Figure 1 The front view;

[0049] Figure 3 An air conditioner indoor unit according to some embodiments is shown. Figure 1 Rear view;

[0050] Figure 4 An air conditioner indoor unit according to some embodiments is shown. Figure 1 A bottom view;

[0051] Figure 5 A second perspective view of an indoor air conditioning unit according to some embodiments is shown;

[0052] Figure 6 A third perspective view of an indoor air conditioning unit according to some embodiments is shown;

[0053] Figure 7 A fourth perspective view of an indoor air conditioning unit according to some embodiments is shown;

[0054] Figure 8 An air conditioner indoor unit according to some embodiments is shown. Figure 7 The front view;

[0055] Figure 9 An air conditioner indoor unit according to some embodiments is shown. Figure 7 Top view;

[0056] Figure 10 An air conditioner indoor unit according to some embodiments is shown. Figure 7 A bottom view.

[0057] In the above figures, 100 is the outer casing; 101 is the first air outlet; 102 is the second air outlet; 103 is the third air outlet; 104 is the return air outlet; 200 is the fan; 300 is the indoor heat exchanger; 400 is the first air valve; 500 is the second air valve; 600 is the third air valve; 700 is the first air duct; and 800 is the second air duct. Detailed Implementation

[0058] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0059] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] In this application, the air conditioner performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0063] The compressor compresses refrigerant gas at a low temperature and low pressure 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.

[0064] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0065] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0066] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0067] This utility model discloses an indoor unit for an air conditioner, relating to the field of air conditioning technology. See the attached document for details. Figures 1-10 The indoor unit of the air conditioner is described.

[0068] Reference Appendix Figures 1 to 10 An air conditioner indoor unit includes a housing 100. The housing 100 is hollow inside and serves as the main structure of the air conditioner indoor unit. It not only plays a protective role, but also achieves reasonable airflow guidance by opening a return air vent 104 and an air outlet. The return air vent 104 and the air outlet are distributed along the circumference of the housing.

[0069] A return air vent 104 is provided on the outer casing 100. The return air vent 104 is used to receive indoor air as the starting point of air circulation.

[0070] A single 104-type return air vent can avoid the need for multiple openings in the ceiling, resulting in a more aesthetically pleasing finish.

[0071] Reference Appendix Figure 5 At least one fan 200 is provided inside the housing 100. The fan 200 is located near the return air vent 104 to guide airflow into the housing 100.

[0072] Reference Appendix Figure 5 , Figure 6 , Figure 8 , Figure 9 The outer casing 100 also contains an indoor heat exchanger 300, which is located on the air outlet side of the fan 200.

[0073] The side of the indoor heat exchanger 300 facing the fan 200 is the windward side, and the side away from the fan 200 is the leeward side.

[0074] The indoor heat exchanger 300 is a temperature control component that regulates the airflow temperature. It transfers the cooling or heating effect to the air through heat exchange, thereby exchanging heat with the airflow passing through it.

[0075] The airflow entering the housing 100 from the return air vent 104 is boosted by the fan 200 and blown from the air outlet side of the fan 200 to the indoor heat exchanger 300. The indoor heat exchanger 300 absorbs heat to reduce the airflow temperature and form a cooling airflow.

[0076] Alternatively, the airflow entering the housing 100 from the return air vent 104 is boosted by the fan 200, and then blown from the air outlet side of the fan 200 to the indoor heat exchanger 300. The indoor heat exchanger 300 releases heat to increase the airflow temperature and form a heating airflow.

[0077] The air outlets on the outer casing 100 include a first air outlet 101 and a second air outlet 102.

[0078] Reference Appendix Figure 6 and Figure 7 The first air outlet 101 is located on the side wall of the outer casing 100 opposite to the leeward side of the indoor heat exchanger. That is, the first air outlet 101 is provided on the front surface of the outer casing 100. The first air outlet 101 is used to output cooling airflow in the horizontal direction in front of the outer casing 100.

[0079] The first air outlet 101 typically faces away from the wall of the room or towards the center of the room. The cooling airflow output through the first air outlet 101 sinks in or near the center of the room. This ensures that the cooling effect of the cooling airflow output from the first air outlet 101 is evenly distributed throughout the room.

[0080] Reference Appendix Figure 6 and Figure 7 At least one second air outlet 102 is provided on the two side walls of the outer casing 100 adjacent to the first air outlet 101.

[0081] The outer casing 100 is positioned such that one end face is close to the room wall.

[0082] At this time, the outer casing 100 may have a second air outlet 102 on only one end face along its length, with the second air outlet 102 facing away from the room wall. This is to prevent the heating airflow output from the second air outlet 102 from being blocked by the room wall, so as to ensure uniform heating effect in the room.

[0083] When the outer casing 100 is positioned in the center of the room, two second air outlets 102 can be opened on the two side end faces along the length of the outer casing 100. This is to ensure that the heating airflow output from the second air outlets 102 is evenly distributed in the room.

[0084] Reference Appendix Figure 4 , Figure 6 , Figure 7 , Figure 10 The bottom of the outer casing 100 is also provided with a third air outlet 103, which is used to output heating airflow to the lower part of the outer casing 100.

[0085] The third air outlet 103 faces the bottom of the room. The heating airflow output from the third air outlet 103 first heats the air at the bottom of the room, and then rises in or near the middle of the room. This ensures that the heating airflow output from the third air outlet 103 is evenly distributed throughout the room.

[0086] The return air vent 104 on the outer casing 100 is located at the other end of the outer casing 100 relative to the first air outlet 101, that is, the return air vent 104 is located on the side wall of the outer casing 100 opposite to the windward side of the indoor heat exchanger 300.

[0087] The relative arrangement of the return air inlet 104 and the first air outlet 101 can form an effective airflow circulation path.

[0088] The return air vent 104 is responsible for drawing in stale indoor air, while the air outlet is responsible for sending treated fresh air back into the room. This layout helps to ensure effective air circulation and improve the cooling or heating effect of the indoor air conditioner.

[0089] A filter screen is installed at the return air vent 104 on the outer casing 100.

[0090] Because of the fixed setting of the return air vent 104 and its cooperation with the first air outlet 101, the second air outlet 102, and the third air outlet 103, the airflow direction of the return air vent 104 is fixed, and there is no reverse airflow. This avoids the problem of hair and dust accumulated on the filter screen at the return air vent 104 being blown out.

[0091] The outer casing 100 is also provided with a second air duct 800, which is located at the position of the first air outlet 101 on the outer casing 100. The second air duct 800 is hollow inside and open at both ends.

[0092] Reference Appendix Figure 1 , Figure 2 , Figure 4 One end of the second air duct 800 is connected to the first air outlet 101, and the other end extends horizontally away from the outer casing 100 to a preset position.

[0093] The second air duct 800 is used to guide the first air outlet 101 to output cooling airflow at a preset position.

[0094] It should be noted that the installation environment of the indoor unit of the air conditioner does not always place the first air outlet 101 in the most suitable output position. In installation environments with relatively large rooms, the indoor unit of the air conditioner is always located close to the wall in order to match the installation of the outdoor unit.

[0095] At this time, the cold air output from the first air outlet 101 is closer to one end of the room and farther away from the other end. The cooling effect on the end of the room that is far away from the first air outlet 101 is not good, and the technical effect of uniform cooling cannot be achieved.

[0096] Therefore, by extending the output of the cold air from the first air outlet 101 to a preset position via the second air duct 800, the aforementioned problem of uneven cooling can be solved. The preset position can be set to the center of the room, depending on the actual situation.

[0097] The second air duct 800 extends the output position of the first air outlet 101 to the middle of the room, so that the distance between the air outlet and the two ends of the room is equal, thereby allowing the output cold air to sink evenly for cooling.

[0098] The outer casing 100 is provided with a first air duct, which connects the first air outlet 101 and the return air outlet 104. The first air duct is used to ensure that the airflow entering the interior of the outer casing 100 through the return air outlet 104 can be smoothly delivered to the first air outlet 101 after being refrigerated, so that the refrigerated airflow is output through the first air outlet 101.

[0099] The outer casing 100 is provided with a second air duct, which connects the second air outlet 102 and the return air outlet 104. The second air duct is used to ensure that the airflow entering the interior of the outer casing 100 through the return air outlet 104 can be smoothly delivered to the second air outlet 102 after being heated, so that the heated airflow is output through the second air outlet 102.

[0100] The outer casing 100 is provided with a third air duct, which connects the third air outlet 103 and the return air outlet 104. The third air duct is used to ensure that the airflow entering the interior of the outer casing 100 through the return air outlet 104 can be smoothly delivered to the third air outlet 103 after being heated, so that the heated airflow is output through the third air outlet 103.

[0101] The housing 100 is equipped with at least one fan 200, which is used to deliver air to the first air duct, the second air duct and the third air duct. This causes the airflow entering the housing 100 through the return air vent 104 to flow to the first air outlet 101, the second air outlet 102 and the third air outlet 103.

[0102] It should be noted that, considering the coordinated setup of one return air vent 104 and multiple air outlets, if there are high requirements for the air volume of the air outlets, one fan 200 is insufficient to meet the air supply needs. Therefore, the number of fans 200 should be set according to the actual situation.

[0103] Reference Appendix Figure 3 , Figure 5 , Figure 6In some embodiments of this application, the number of fans 200 can be set to three to increase the air volume delivered to each air outlet, thereby improving the air delivery efficiency.

[0104] In some embodiments of this application, fan 200 is a cross-flow fan 200 or a centrifugal fan 200.

[0105] The cross-flow fan 200 has the advantages of low noise and high air volume. The cross-flow fan 200 is generally suitable for occasions that require quiet operation and high air volume.

[0106] The cross-flow fan 200 can generate a more uniform airflow, making the temperature in different areas of the room more even and improving comfort.

[0107] The design of the Crossflow Fan 200 prioritizes noise reduction. Even when multiple Crossflow Fans 200 are operating simultaneously, they maintain a low noise level, providing users with a quiet environment.

[0108] Centrifugal fan 200 has strong airflow driving capability and stability. Centrifugal fan 200 is usually suitable for occasions that require fast and efficient air delivery.

[0109] The centrifugal fan 200 can quickly deliver the treated air to every corner of the room, ensuring rapid regulation of indoor temperature and humidity.

[0110] The centrifugal fan 200 can maintain airflow stability during operation, avoiding the impact of airflow fluctuations on the air conditioning effect.

[0111] It should be noted that, based on the configuration of multiple fans 200, cross-flow fans 200 and centrifugal fans 200 can be mixed and arranged inside the housing 100, so as to flexibly adjust the working status of cross-flow fans 200 and centrifugal fans 200 according to the indoor environment and user needs, and achieve customized air supply.

[0112] When rapid cooling or heating is required, the power of the centrifugal fan 200 can be increased; when maintaining a quiet indoor environment, the cross-flow fan 200 can be relied upon more.

[0113] Reference Appendix Figure 5 The outer casing 100 also includes a first air valve 400, which is located on the first air outlet 101. The first air valve 400 is used to control the opening and closing of the first air outlet 101, thereby adjusting the airflow direction in accordance with the working mode of the indoor heat exchanger 300.

[0114] It should be noted that the first air outlet 101 faces the front of the outer casing 100, and the first air outlet 101 is fixed to output cooling airflow in a horizontal direction away from the outer casing 100. Therefore, the first air valve 400 is set to open in the cooling mode of the indoor heat exchanger 300 by an independent first air valve 400 controller, so as to output cooling airflow through the first air outlet 101.

[0115] Conversely, when the indoor heat exchanger 300 is in heating mode, the first air valve 400 is closed at this time. This is to prevent the output of heating airflow through the first air outlet 101, thereby avoiding excessive heating airflow accumulating at the top of the room, which could lead to excessively high local temperatures and a poor user experience.

[0116] Reference Appendix Figure 5 The outer casing 100 also includes a second air valve 500, which is located on the second air outlet 102. The second air valve 500 is used to control the opening and closing of the second air outlet 102, thereby adjusting the airflow direction in accordance with the working mode of the indoor heat exchanger 300.

[0117] The first air duct 700 is located at the position of the second air outlet 102 on the outer casing 100. The first air duct 700 is hollow inside and open at both ends.

[0118] One end of the first air duct 700 is connected to the second air outlet 102, and the other end extends away from the outer casing 100 and then bends downwards from the outer casing 100 so that the actual air outlet direction is downwards from the outer casing 100.

[0119] The first air duct 700 is used to guide the second air outlet 102 to output heating airflow downwards from the outer casing 100.

[0120] It should be noted that the second air outlet 102 faces the side of the outer casing 100, and the second air outlet 102 is fixed in conjunction with the first air duct 700 to output heating airflow downwards to the outer casing 100. Therefore, the second air valve 500 is set to open in the heating mode of the indoor heat exchanger 300 through an independent second air valve 500 controller, so as to output heating airflow through the second air outlet 102.

[0121] Conversely, when the indoor heat exchanger 300 is in cooling mode, the second air valve 500 is closed. This is to prevent the output of cooling airflow through the second air outlet 102, thereby avoiding excessive cooling airflow accumulating at the bottom of the room, which could lead to excessively low local temperatures and a poor user experience.

[0122] Reference Appendix Figure 4 The third air valve 600 is located on the third air outlet 103. The third air valve 600 is used to control the opening and closing of the third air outlet 103, thereby adjusting the airflow direction in accordance with the working mode of the indoor heat exchanger 300.

[0123] It should be noted that the third air outlet 103 faces downwards from the outer casing 100, and is fixed to output heating airflow downwards from the outer casing 100. Therefore, the third air valve 600 is set to open in the heating mode of the indoor heat exchanger 300 via an independent third air valve 600 controller, so as to output heating airflow through the third air outlet 103.

[0124] Conversely, when the indoor heat exchanger 300 is in cooling mode, the third air valve 600 is closed. This is to prevent the output of cooling airflow through the third air outlet 103, thereby avoiding excessive cooling airflow accumulating at the bottom of the room, which could lead to excessively low local temperatures and a poor user experience.

[0125] In some embodiments of this application, the first air outlet 101, the second air outlet 102, and the third air outlet 103 are integrated with the first air valve 400, the second air valve 500, and the third air valve 600, respectively, for ease of installation.

[0126] Depending on the actual situation, the first air valve 400, the second air valve 500, and the third air valve 600 can be circular, rectangular, or other shapes.

[0127] In some embodiments of this application, the size and area of ​​any air outlet or any air valve are designed according to the air volume so that the average wind speed Z1 of the airflow satisfies: Z1≥1.0m / s, Z1≤4.0m / s.

[0128] By limiting the average airflow velocity at any air outlet or damper, the airflow can be distributed more evenly throughout the room, preventing areas from experiencing excessively strong or weak airflow. This improves indoor comfort and reduces discomfort caused by uneven airflow distribution.

[0129] In some embodiments of this application, the size and area of ​​any air outlet or any air valve are designed according to the air volume so that the average wind speed Z2 of the airflow satisfies: Z2≥1.5m / s, Z2≤2.5m / s.

[0130] By limiting the average airflow velocity at any air outlet or any air valve, the noise generated by the air conditioning system during operation is effectively reduced, providing a quieter and more comfortable environment for indoor occupants.

[0131] Too low a wind speed may lead to insufficient heat exchange, while too high a wind speed may increase energy loss and noise. Limiting the wind speed can optimize the performance of the heat exchanger and improve energy efficiency.

[0132] When the indoor unit of the air conditioner is used for cooling, airflow enters the outer casing 100 through the return air vent 104. The airflow entering the outer casing 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange. The airflow cooled by the indoor heat exchanger 300 then enters the first air duct, the second air duct, and the third air duct.

[0133] At this time, the first air valve 400, the second air valve 500, and the third air valve 600 cooperate with the indoor heat exchanger 300 to perform cooling operations via switches. Specifically, the first air valve 400 is open, while the second air valve 500 and the third air valve 600 are closed.

[0134] The cooled airflow enters the first, second, and third air ducts, but can only be output through the first air duct from the first air outlet 101 in a horizontal direction away from the outer casing 100. The cooled airflow gradually descends and cools down in the room from top to bottom, achieving a uniform cooling effect.

[0135] When the indoor unit of the air conditioner is used for heating, airflow enters the outer casing 100 through the return air vent 104. The airflow entering the outer casing 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange. The airflow that has been heated by the indoor heat exchanger 300 enters the first air duct, the second air duct, and the third air duct.

[0136] At this time, the first air valve 400, the second air valve 500, and the third air valve 600 cooperate with the indoor heat exchanger 300 to operate in heating mode. Specifically, the first air valve 400 is closed, while the second air valve 500 and the third air valve 600 are open.

[0137] The heated airflow enters the first, second, and third air ducts, and through the second and third air ducts, it outputs heating airflow downwards from the second air outlet 102 and the third air outlet 103 to the lower part of the outer casing 100. The heating airflow gradually rises from bottom to top in the room to heat the air, achieving a uniform heating effect.

[0138] In some embodiments of this application, the ratio X1 of the air outlet area of ​​the first air outlet 101, the second air outlet 102 and the third air outlet 103 to the working area of ​​the indoor heat exchanger 300 satisfies: X1≥0.3, X1≤0.8.

[0139] The air outlet area of ​​the first air outlet 101, the second air outlet 102, and the third air outlet 103 is essentially the product of the length and width of each air outlet.

[0140] The working area of ​​the indoor heat exchanger 300 is essentially the surface area where heat is transferred between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0141] By limiting the ratio of the two values ​​mentioned above, the size of the air outlet is ensured to match 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, reaching the ideal temperature before being sent out, thereby improving heat exchange efficiency.

[0142] And / or, the ratio Y1 of the size area of ​​the air outlet of the first air valve 400, the second air valve 500 and the third air valve 600 to the working area of ​​the heat exchanger, the ratio Y1 satisfies: Y1≥0.3, Y1≤0.8.

[0143] The dimensions and areas of the air outlets of the first air valve 400, the second air valve 500, and the third air valve 600 are essentially the product of the length and width of the air outlet controlled by each air valve.

[0144] The working area of ​​the indoor heat exchanger 300 is essentially the surface area where heat is transferred between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0145] By limiting the ratio of the two factors mentioned above, the failure rate caused by poor airflow or insufficient heat exchange is reduced. Any damper can flexibly adjust the airflow and temperature according to actual needs, improving response speed and adaptability.

[0146] In other embodiments of this application,

[0147] Reference Appendix Figure 4 , Figure 7 , Figure 10 The return air vent 104 is located on the bottom surface of the outer casing 100, and a preset distance is provided between the return air vent 104 and the third air outlet 103.

[0148] The return air vent 104 is located at the bottom of the casing 100, providing more options for the installation of the indoor air conditioner. This avoids the need for a return air vent 104 on the rear end of the casing 100 for return air when the casing 100 is used for installation, which would result in insufficient return air volume.

[0149] The return air vent 104 and the third air outlet 103 are both located at the bottom of the outer casing 100. This can lead to a short circuit between the return air vent 104 and the air outlet 103. In other words, the heating airflow from the third air outlet 103 is immediately sent back into the outer casing 100 by the return air vent 104 for reprocessing before it is used to output the heating air to the preset indoor location, thus reducing the heating efficiency.

[0150] By setting a preset distance between the return air inlet 104 and the third air outlet 103, the return air path of the return air inlet 104 and the outlet air path of the third air outlet 103 are separated by a certain distance to avoid mutual interference, thereby solving the problem of low heating efficiency.

[0151] By positioning the return air vent 104 at the bottom of the outer casing 100 and setting a preset distance between the return air vent 104 and the third air outlet 103, the installation flexibility of the indoor unit of the air conditioner is improved, and the technical effect of heating efficiency is also guaranteed.

[0152] In some embodiments of this application, a plurality of first grilles are arranged at the return air inlet 104 to guide airflow back into the housing 100 based on a first direction.

[0153] Multiple first grilles are arranged at the return air inlet 104 to form a first air guide grille. The first air guide grille is used to guide the airflow entering the housing 100 from the return air inlet 104 backflow in a first direction. That is, the direction of the backflow airflow is controlled and guided.

[0154] Multiple second grilles are arranged at the third air outlet 103 to guide airflow out of the outer casing 100 in a second direction.

[0155] Multiple second grilles are arranged at the return air inlet 104 to form a second air guide grille, which is used to guide the airflow from the third air outlet 103 out of the housing 100 in a second direction. That is, the direction of the output airflow is controlled and guided.

[0156] The angle between the first direction and the second direction is an acute angle.

[0157] By staggering the direction of the return airflow from that of the output airflow, a short circuit between the outlet and return airflow is avoided.

[0158] Furthermore, the larger the angle between the first and second directions, the smaller the airflow volume and return airflow volume. By limiting the angle between the two airflow directions to an acute angle, it is ensured that the return airflow volume and airflow volume can meet the requirements.

[0159] In some embodiments of this application, the angle α between the first direction and the second direction satisfies: α ≥ 30°, α ≤ 45°.

[0160] The smaller the angle between the first direction and the second direction, the more easily the air supply path and the air return path will affect each other, thus causing a short circuit between the air supply and the air return.

[0161] Therefore, by limiting the angle between the first and second directions while ensuring that the air supply and return volumes meet the requirements, it is also possible to achieve the technical effect of avoiding short circuits between the air supply and return volumes.

[0162] In some embodiments of this application, the first grille at the return air inlet 104 and the second grille at the third air outlet 103 are integrated to form a third air guide grille. This facilitates the direct installation of the third air guide grille onto the bottom of the housing 100 during installation.

[0163] Because the first and second bars on the third air guide grille have different air guiding directions, short-circuiting of the air outlet and return can be avoided.

[0164] In other embodiments of this application,

[0165] The ratio X2 of the air outlet area of ​​the first air outlet 101, the second air outlet 102 and the third air outlet 103 to the working area of ​​the heat exchanger satisfies: X2≥0.4, X2≤0.6.

[0166] The working area of ​​the indoor heat exchanger 300 is essentially the surface area where heat is transferred between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0167] By limiting the ratio of the two values ​​mentioned above, the size of the air outlet is ensured to match 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, reaching the ideal temperature before being sent out, thereby improving heat exchange efficiency.

[0168] And / or, the ratio Y2 of the size area of ​​the air outlet of the first air valve 400, the second air valve 500 and the third air valve 600 to the working area of ​​the heat exchanger, the ratio Y2 satisfies: Y2≥0.4, Y2≤0.6.

[0169] The air outlet area of ​​the air vents of the first air valve 400, the second air valve 500, and the third air valve 600 is essentially the product of the length and width of the air vent controlled by each air valve.

[0170] The working area of ​​the indoor heat exchanger 300 is essentially the surface area where heat is transferred between the indoor heat exchanger 300 and the airflow when the airflow passes through the indoor heat exchanger 300.

[0171] By limiting the ratio of the two factors mentioned above, the failure rate caused by poor airflow or insufficient heat exchange is reduced. Any damper can flexibly adjust the airflow and temperature according to actual needs, improving response speed and adaptability.

[0172] In other embodiments of this application,

[0173] The indoor unit of the air conditioner includes an air guide module, which is used to guide the output heating airflow downwards from the outer casing 100.

[0174] Since the second air outlet 102 is located on the side end face of the outer casing 100, the air guiding module is connected to the second air outlet 102 to guide the heating airflow output from the second air outlet 102 to be output downwards from the outer casing 100. This allows the heating airflow to gradually rise from bottom to top for uniform heating.

[0175] Since the third air outlet 103 is located on the bottom surface of the outer casing 100, the air guide module connects to the third air outlet 103 to guide the third air outlet 103 to extend a preset length downwards from the outer casing 100. This allows the output heating airflow to be released at a preset position below the outer casing 100, precisely controlling the output position of the heating airflow to meet different user heating needs.

[0176] The air guide module directs the heating airflow downwards from the outer casing 100, providing greater flexibility in the specific placement of the second air outlet 102 and / or the third air outlet 103. This ensures that the heating airflow from the air outlets at different locations can cover the entire room, improving human comfort.

[0177] When the indoor unit of the air conditioner is used for cooling, airflow enters the outer casing 100 through the return air vent 104. The airflow entering the outer casing 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange. The airflow cooled by the indoor heat exchanger 300 then enters the first air duct, the second air duct, and the third air duct.

[0178] At this time, the first air valve 400, the second air valve 500, and the third air valve 600 cooperate with the indoor heat exchanger 300 to perform cooling operations via switches. Specifically, the first air valve 400 is open, while the second air valve 500 and the third air valve 600 are closed.

[0179] The cooled airflow enters the first, second, and third air ducts, but can only be output through the first air duct from the first air outlet 101 in a horizontal direction away from the outer casing 100. The cooled airflow gradually descends and cools down in the room from top to bottom, achieving a uniform cooling effect.

[0180] When the indoor unit of the air conditioner is used for heating, airflow enters the outer casing 100 through the return air vent 104. The airflow entering the outer casing 100 is guided by the fan 200 to pass through the indoor heat exchanger 300 for heat exchange. The airflow that has been heated by the indoor heat exchanger 300 enters the first air duct, the second air duct, and the third air duct.

[0181] At this time, the first air valve 400, the second air valve 500, and the third air valve 600 cooperate with the indoor heat exchanger 300 to operate in heating mode. Specifically, the first air valve 400 is closed, while the second air valve 500 and the third air valve 600 are open.

[0182] The heated airflow enters the first, second, and third air ducts, but can only pass through the second and third air ducts to output heating airflow downwards from the second air outlet 102 and the third air outlet 103, based on the air guide module. The heating airflow gradually rises from bottom to top in the room to heat the air, achieving a uniform heating effect.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0184] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An air conditioner indoor unit characterized by comprising: The air conditioner comprises: a housing, a return air inlet and an air outlet being arranged on the housing, the return air inlet and the air outlet being distributed along the circumference of the housing; a fan, at least one of the fans being arranged in the housing, the fan being arranged close to the return air inlet; an indoor heat exchanger, being arranged on the air outlet side of the fan, for exchanging heat with the airflow passing through it; the air outlet comprises a first air outlet and a second air outlet, the first air outlet and the second air outlet being arranged on the two adjacent side walls of the housing respectively, the first air outlet being arranged on the side wall of the housing opposite to the leeward side of the indoor heat exchanger; a first air valve, being arranged on the first air outlet, for opening or closing the first air outlet; a second air valve, being arranged on the second air outlet, for opening or closing the second air outlet; a first air guide pipe, one end of the first air guide pipe being communicated with the second air outlet, the other end of the first air guide pipe being extended by bending to direct the second air outlet to output the heating airflow below the housing; when the heating airflow is output, the second air outlet outputs the heating airflow below the housing through the first air guide pipe by closing the first air valve and opening the second air valve; when the cooling airflow is output, the cooling airflow is output through the first air outlet by closing the second air valve and opening the first air valve. 2.The indoor unit of the air conditioner according to claim 1, characterized by, Further comprising: a third air outlet being arranged on the bottom end surface of the housing, the third air outlet being used for outputting the heating airflow below the housing. 3.The indoor unit of the air conditioner according to claim 2, characterized by, Further comprising: a third air valve, being arranged on the third air outlet, for opening or closing the third air outlet. 4.The indoor unit of the air conditioner according to claim 1, characterized by, The return air inlet is arranged on the side wall of the housing opposite to the windward side of the indoor heat exchanger. 5.The indoor unit of the air conditioner according to claim 2, characterized in that, The return air inlet is arranged on the bottom end surface of the housing, and a preset distance is arranged between the return air inlet and the third air outlet. 6.The indoor unit of the air conditioner according to claim 5, characterized by, Further comprising: a plurality of first grid bars, the first grid bars being arranged at the return air inlet, for guiding the airflow to flow back into the housing based on a first direction; a plurality of second grid bars, the second grid bars being arranged at the third air outlet, for guiding the airflow to flow out of the housing based on a second direction; The included angle between the first direction and the second direction is an acute angle. 7.The indoor unit of the air conditioner according to claim 6, characterized by, The included angle α between the first direction and the second direction satisfies: α≥30°, α≤45°. 8.The air conditioning indoor unit according to any one of claims 2 to 7, characterized by, The ratio X1 of the air outlet area of the first air outlet, the second air outlet and the third air outlet to the working area of the indoor heat exchanger satisfies: X1≥0.3, X1≤0.8; and / or, the ratio Y1 of the size area of the air inlets of the first air valve, the second air valve and the third air valve to the working area of the indoor heat exchanger satisfies: Y1≥0.3, Y1≤0.

8. 9.The indoor unit of the air conditioner according to any one of claims 2 to 7, characterized by, The ratio X2 of the air outlet area of the first air outlet, the second air outlet and the third air outlet to the working area of the indoor heat exchanger satisfies: X2≥0.4, X2≤0.6; And / or, the ratio Y2 of the size area of the air inlets of the first air valve, the second air valve and the third air valve to the working area of the indoor heat exchanger, the ratio Y2 satisfies: Y2≥0.4, Y2≤0.

6.

10. An air conditioner indoor unit characterized by comprising: Comprise: A shell, a return air inlet and an air outlet are arranged on the shell, and the return air inlet and the air outlet are distributed along the circumference of the shell; At least one fan is arranged in the shell, and the fan is arranged close to the return air inlet; An indoor heat exchanger is arranged on the air outlet side of the fan for exchanging heat with the airflow passing through it; 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 the two adjacent side walls of the shell, and the first air outlet is arranged on the side wall of the shell opposite to the leeward side of the indoor heat exchanger; A first air valve is arranged on the first air outlet for opening or closing the first air outlet; A second air valve is arranged on the second air outlet for opening or closing the second air outlet; An air guide module is used to guide the output of the heating airflow to the lower side of the shell; When the heating airflow is output, the second air outlet outputs the heating airflow to the lower side of the shell through the air guide module by closing the first air valve and opening the second air valve; when the cooling airflow is output, the cooling airflow is output to the horizontal direction away from the shell through the first air outlet by closing the second air valve and opening the first air valve.

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