Indoor unit and air conditioner

Abstract

The utility model provides an indoor unit and an air conditioner. The indoor unit comprises a shell, the shell is provided with a first air outlet, a second air outlet and an air return opening, and the first air outlet is located above the second air outlet; a heat exchanger; the cross-flow fan is arranged between the heat exchanger and the first air outlet and the second air outlet and comprises an impeller, a first air duct piece and a second air duct piece, a first air duct and a second air duct are arranged in the first air duct piece and the second air duct piece respectively, the first air duct is communicated with the first air outlet, and the second air duct is communicated with the second air outlet; the air duct switching component is arranged in the shell and can rotate between a first position and a second position, when the air duct switching component is located at the first position, the air duct switching component blocks the second air duct and opens the first air duct to discharge air through the first air duct and the first air outlet, and when the air duct switching component is located at the second position, the air duct switching component blocks the first air duct and opens the second air duct to discharge air through the second air outlet. And air is discharged through the second air duct and the second air outlet. In this way, the air outlet comfort can be improved.

Description

Indoor units and air conditioners Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor unit and an air conditioner. Background Technology

[0002] The indoor unit is an important component of an air conditioner. It uses a fan to drive gas through a heat exchanger, where it exchanges heat with the refrigerant to become cool or hot air, which then flows out from the air outlet to achieve the cooling or heating function.

[0003] Traditional indoor units typically only blow cold air downwards and hot air upwards, affecting airflow comfort. Summary of the Invention

[0004] One of the technical problems this application aims to solve is: improving the airflow comfort of the indoor unit.

[0005] To solve the above-mentioned technical problems, this application provides an indoor unit, which includes:

[0006] The outer casing has a first air outlet, a second air outlet, and a return air outlet, with the first air outlet located above the second air outlet;

[0007] The heat exchanger is housed within the outer casing;

[0008] A cross-flow fan is positioned between a heat exchanger and a first and a second air outlet, along the gas flow direction. It includes an impeller and a duct assembly arranged sequentially along the gas flow direction. The duct assembly includes a first duct component and a second duct component, each containing a first and a second duct. The first duct is connected to the first air outlet, and the second duct is connected to the second air outlet.

[0009] The air duct switching component is located inside the housing and can rotate between a first position and a second position. When in the first position, the air duct switching component blocks the second air duct and opens the first air duct, so that the gas of the impeller drive mechanism flows from the return air port through the heat exchanger and then flows out through the first air duct and the first air outlet. When in the second position, the air duct switching component blocks the first air duct and opens the second air duct, so that the gas of the impeller drive mechanism flows from the return air port through the heat exchanger and then flows out through the second air duct and the second air outlet.

[0010] In some embodiments, the duct switching component includes a first baffle and a second baffle, which are arranged at intervals on both radial sides of the impeller and rotate synchronously to allow the duct switching component to rotate between a first position and a second position.

[0011] In some embodiments, a first opening and a second opening are provided between the first baffle and the second baffle, located on both radial sides of the impeller. When in the first position, the first baffle blocks the second air duct, the first opening communicates with the first air duct, and communicates with the heat exchanger through the second opening, so that the air duct switching component blocks the second air duct and opens the first air duct. When in the second position, the second baffle blocks the first air duct, the first opening communicates with the second air duct, and communicates with the heat exchanger through the second opening, so that the air duct switching component blocks the first air duct and opens the second air duct.

[0012] In some embodiments, the ends of the first baffle and / or the second baffle are provided with bent portions, which are sealed to the air duct assembly.

[0013] In some embodiments, the bent portion is in a sealing fit with the first air duct component and / or the second air duct component.

[0014] In some embodiments, the bent portion at the end of the first baffle is in a sealing engagement with the second duct wall of the first air duct component at a first position, and / or in a sealing engagement with the second duct wall of the second air duct component at a second position; and / or, the bent portion at the end of the second baffle is in a sealing engagement with the first duct wall of the first air duct component at a first position, and / or in a sealing engagement with the first duct wall of the second air duct component at a second position.

[0015] In some embodiments, the bending angle α of the bent portion is 55 to 62°; and / or, when in the second position, the included angle γ between the bent portion at the end of the second baffle and the first air duct wall of the first air duct component is 27 to 32°.

[0016] In some embodiments, the bending angle α of the bend is 56 to 58°; and / or, when in the second position, the included angle γ between the bend at the end of the second baffle and the first air duct wall of the first air duct member is 28 to 30°.

[0017] In some embodiments, the first baffle and / or the second baffle includes a first plate segment and a second plate segment, the first plate segment being connected to the bending portion via the second plate segment, and the second plate segment being recessed relative to the first plate segment toward the side closer to the impeller.

[0018] In some embodiments, the first plate segment is arc-shaped; and / or, the second plate segment is zigzag-shaped.

[0019] In some embodiments, the included angle β between the first air duct wall of the second air duct component and the second air duct wall of the first air duct component is 32 to 40°; and / or, the first air duct wall of the second air duct component and the second air duct wall of the first air duct component are interconnected.

[0020] In some embodiments, the included angle β between the first air duct wall of the second air duct component and the second air duct wall of the first air duct component is 34 to 36°.

[0021] In some embodiments, the indoor unit is configured to be at least one of the following:

[0022] The indoor unit also includes a rotary drive mechanism, which is connected to the air duct switching component to drive the air duct switching component to rotate.

[0023] The outer casing has at least two return air vents;

[0024] The first and second air outlets are located on the front panel of the casing;

[0025] A first air guide plate is provided at the first air outlet. The first air guide plate controls the opening and closing of the first air outlet and guides the airflow from the first air outlet to flow horizontally or diagonally upward when the first air outlet is opened.

[0026] A second air guide plate is installed at the second air outlet, and the second air guide plate controls the opening and closing of the second air outlet.

[0027] In some embodiments, the rotary drive mechanism includes a rack, a gear, and a power mechanism. The rack is connected to the air duct switching component, the gear meshes with the rack, and is driven by the power mechanism so that the power mechanism drives the air duct switching component to rotate through the gear and rack; and / or, at least two return air inlets include two return air inlets that are vertically opposite each other.

[0028] In addition, this application also provides an air conditioner, which includes an indoor unit according to any embodiment.

[0029] By setting a return air vent and a first air outlet and a second air outlet arranged sequentially from top to bottom on the casing of the cross-flow indoor unit, and setting a rotatable air duct switching component inside the casing, the first air duct connected to the first air outlet and the second air outlet connected to the second air outlet can be switched on and off by rotating the air duct switching component. This controls the cold air and hot air to be blown out from the first air outlet and the second air outlet respectively, making it easy to realize the upward or horizontal blowing of cold air and the downward blowing of hot air. This ensures that the cold air does not blow into people when cooling and the hot air can fall to the ground when heating. Therefore, it helps to improve the air supply comfort of the indoor unit.

[0030] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 is a three-dimensional schematic diagram of the indoor unit in an embodiment of this application.

[0033] Figure 2 is a three-dimensional schematic diagram of the indoor unit after longitudinal sectioning at the rotary drive mechanism in an embodiment of this application.

[0034] Figure 3 is a perspective view of the combined structure of the air duct switching component, the rotary drive mechanism and the impeller in the embodiment of this application.

[0035] Figure 4 is a three-dimensional schematic diagram of the combined structure of the air duct switching component and the rack in the embodiment of this application.

[0036] Figure 5 is a schematic diagram of the indoor unit in the embodiment of this application when the air duct switching component is in the first position.

[0037] Figure 6 is a schematic diagram of the gas flow direction of the indoor unit in the embodiment of this application when the air duct switching component is in the first position.

[0038] Figure 7 is a magnified view of part I in Figure 6.

[0039] Figure 8 is a schematic diagram of the indoor unit in the embodiment of this application when the air duct switching component is in the second position.

[0040] Figure 9 is a schematic diagram of the gas flow direction of the indoor unit in the embodiment of this application when the air duct switching component is in the second position.

[0041] Figure 10 is a magnified view of part II in Figure 9.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10. Indoor unit;

[0044] 1. Outer shell; 11. First air outlet; 12. Second air outlet; 13. Return air outlet; 14. First cavity; 15. Second cavity; 16. Top plate; 17. Bottom plate; 18. Front plate; 19. Rear plate;

[0045] 2. Heat exchanger; 21. First heat exchange section; 22. Second heat exchange section;

[0046] 3. Impeller; 31. Impeller drive mechanism; 32. Motor;

[0047] 4. Air duct assembly; 41. First air duct component; 42. Second air duct component; 43. First air duct; 44. Second air duct; 45. First volute; 46. First volute tongue; 47. Second volute; 48. Second volute tongue;

[0048] 51. First air guide plate; 52. Second air guide plate;

[0049] 6. Water drip tray;

[0050] 7. Air duct switching component; 71. First baffle; 72. Second baffle; 73. Bending section; 75. First opening; 76. Second opening; 77. First plate segment; 78. Second plate segment;

[0051] 8. Rotary drive mechanism; 81. Rack; 82. Gear; 83. Power mechanism;

[0052] 9. Cross-flow fan. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0054] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0055] In the description of this application, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0056] In this application, unless otherwise stated, “multiple” means at least two, that is, including cases of two and at least three.

[0057] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0058] Cold air is denser and tends to sink. If cold air blows downwards, it can cause cold feet and a hot head, resulting in an uncomfortable experience. At the same time, cold air blowing directly on a person can also cause discomfort. On the other hand, hot air is less dense and tends to rise. When hot air blows upwards, the hot air gradually rises and accumulates, which can cause the ceiling to feel hot while the human body feels cold, also resulting in an uncomfortable experience.

[0059] Therefore, cold air blowing downwards and hot air blowing upwards will affect the comfort of airflow.

[0060] To improve airflow comfort, this application provides an indoor unit and an air conditioner.

[0061] Figures 1-10 exemplarily illustrate the structure of the indoor unit in this application.

[0062] Referring to Figures 1-10, in this application, the indoor unit 10 includes a casing 1, a heat exchanger 2, a cross-flow fan 9, and a duct switching component 7. The casing 1 has a first air outlet 11, a second air outlet 12, and a return air outlet 13, with the first air outlet 11 located above the second air outlet 12. The heat exchanger 2 is disposed inside the casing 1. The cross-flow fan 9 is disposed between the heat exchanger 2 and the first air outlet 11 and the second air outlet 12 along the gas flow direction, and includes an impeller 3 and a duct assembly 4 arranged sequentially along the gas flow direction. The duct assembly 4 includes a first duct component 41 and a second duct component 42, with a first duct 43 and a second duct 44 respectively disposed within the first duct component 41 and the second duct component 42. The first duct 43 communicates with the first air outlet 11, and the second duct 44 communicates with the second air outlet 12. The air duct switching component 7 is disposed inside the housing 1 and can rotate between a first position and a second position. When in the first position, the air duct switching component 7 blocks the second air duct 44 and opens the first air duct 43, so that the impeller 3 drives the gas from the return air port 13 through the heat exchanger 2 and then flows out through the first air duct 43 and the first air outlet 11. When in the second position, the air duct switching component 7 blocks the first air duct 43 and opens the second air duct 44, so that the impeller 3 drives the gas from the return air port 13 through the heat exchanger 2 and then flows out through the second air duct 44 and the second air outlet 12.

[0063] In the above scheme, the indoor unit 10 uses a cross-flow fan 9 to drive the air flow, making it a cross-flow indoor unit. A cross-flow indoor unit is distinct from a centrifugal indoor unit. It uses a cross-flow fan 9 to drive the air flow, with the fan intake and exhaust radially. During operation, the impeller 3 of the cross-flow fan 9 rotates, driving indoor return air into the indoor unit 10 through the return air inlet 13. The air then flows through the heat exchanger 2, exchanging heat with the refrigerant to become either cool or hot air. Afterward, the air enters the impeller 3 radially, passes through it, and exits radially, entering the air duct assembly 4 of the cross-flow fan 9. It then flows along the air duct assembly 4 to the air outlet and exits from the outlet. In contrast, a centrifugal indoor unit uses a centrifugal fan to drive the air flow, with the fan intake axially and exhaust radially.

[0064] Traditional cross-flow indoor units typically have only one air outlet located at the bottom of the casing. Whether cooling or heating, air is emitted from this single outlet, and the direction of airflow is adjusted solely by changing the angle of the air guide plate. In this case, cold air usually blows downwards and hot air blows upwards, affecting the comfort of the airflow.

[0065] In the above-described scheme of this application, the indoor unit 10, which is a cross-flow indoor unit, does not include only one air outlet, but includes two air outlets arranged sequentially from top to bottom, namely the first air outlet 11 and the second air outlet 12. The indoor unit 10 also includes a duct switching component 7. The duct switching component 7, by rotating, switches between opening the first duct 43 connected to the first air outlet 11 and the second duct 44 connected to the second air outlet 12, allowing the cross-flow indoor unit to cool by passing through the first air outlet 11... Air outlet 11 delivers cold air, while hot air is delivered through the second air outlet 12 during heating. Since the first air outlet 11 and the second air outlet 12 are arranged vertically, the cold air is blown out at a higher position, and the hot air is blown out at a lower position. This facilitates the upward or horizontal blowing of cold air during cooling and the downward blowing of hot air during heating. This prevents the cold air from blowing directly on people during cooling and ensures that the hot air can reach the ground during heating. It also prevents the phenomenon of cold feet and hot head during cooling, as well as the phenomenon of cold air blowing directly on the body, and the ceiling being hot while the human body feels very cold during heating. Therefore, it can improve the comfort of airflow.

[0066] Furthermore, in the above-mentioned scheme, the casing 1 of the indoor unit 10 is not only provided with a first air outlet 11 and a second air outlet 12, but also with a return air outlet 13. Moreover, the indoor unit 10 controls the direction of cold and hot air flow by rotating the duct switching component 7 to alternately block one of the second duct 44 and the first duct 43, rather than by interchangeably switching the return air outlet 13 and the air outlet. In this case, the first air outlet 11 and the second air outlet 12 can always be used as air outlets without needing to be interchanged with the return air outlet 13; that is, the first air outlet 11 and the second air outlet 12 do not need to become return air outlets. The air vent 13 is transformed into an air outlet, so that the indoor unit 10 always returns air through the return air vent 13, instead of returning air through the first air outlet 11 and the second air outlet 12. Since the air outlets are generally smaller, that is, the first air outlet 11 and the second air outlet 12 are generally smaller than the return air vent 13, the air always returns through the return air vent 13, instead of returning air through the first air outlet 11 and the second air outlet 12 for part of the time. This helps to ensure sufficient return air volume. Sufficient return air volume can more effectively meet the indoor air circulation needs, making the indoor air fresher and more comfortable. Therefore, it is beneficial to further improve the comfort of the indoor unit 10.

[0067] As can be seen, by setting a return air vent 13 and a first air outlet 11 and a second air outlet 12 arranged sequentially from top to bottom on the outer casing 1 of the cross-flow indoor unit 10, and setting a rotatable air duct switching component 7 inside the outer casing 1, the first air duct 43 connected to the first air outlet 11 and the second air duct 44 connected to the second air outlet 12 can be switched on and off by rotating the air duct switching component 7. This controls the cold air and hot air to be blown out from the first air outlet 11 and the second air outlet 12 respectively. Under the condition of ensuring sufficient return air volume, it is convenient to realize the upward or horizontal blowing of cold air and the downward blowing of hot air, so that the cold air does not blow into people when cooling and the hot air can fall to the ground when heating. Therefore, the air supply comfort of the indoor unit 10 can be effectively improved.

[0068] The air duct switching component 7 can adopt various structural forms.

[0069] For example, in some embodiments, the air duct switching component 7 includes only a baffle, and the second air duct 44 and the first air duct 43 are switched by rotating this baffle. In this case, the structure of the air duct switching component 7 is relatively simple.

[0070] Alternatively, referring to Figures 1-8, in some embodiments, the duct switching component 7 includes a first baffle 71 and a second baffle 72. The first baffle 71 and the second baffle 72 are arranged at intervals on both radial sides of the impeller 3 and rotate synchronously, so that the duct switching component 7 rotates between a first position and a second position. In this case, the duct switching component 7 does not include only one plate, but two plates. These two plates are respectively the first baffle 71 and the second baffle 72, which are arranged at intervals on both radial sides of the impeller 3 and can rotate synchronously. In this case, when the duct switching component 7 uses one of the first baffle 71 and the second baffle 72 to block one of the second duct 44 and the first duct 43, it can also use the other of the first baffle 71 and the second baffle 72 to form a shield on the opposite side of the blocked duct (see Figures 5-7 and Figures 8-10), guiding the gas to the open one of the second duct 44 and the first duct 43, so as to achieve more concentrated air intake of the impeller 3. The ventilation process allows the gas flowing out of heat exchanger 2 to flow more smoothly radially into impeller 3, and the gas flowing radially out of impeller 3 to flow more fully into the open duct. As a result, the airflow is less scattered during its flow from heat exchanger 2 to impeller 3, and there is less backflow during its discharge from impeller 3 to the open duct. Therefore, airflow loss and energy waste can be effectively reduced, and more heat-exchanged gas can flow out from the open duct. That is, more cold air can be blown upward or horizontally from the first air outlet 11, and more hot air can be blown downward from the second air outlet 12. This is beneficial to further improve the comfort of the airflow.

[0071] As can be seen, by setting a return air vent 13 and a first air outlet 11 and a second air outlet 12 arranged sequentially from top to bottom on the outer casing 1 of the cross-flow indoor unit 10, and setting an air duct switching component 7 inside the outer casing 1, including a first baffle 71 and a second baffle 72 arranged at intervals on both radial sides of the impeller 3 and capable of rotating synchronously, the rotation of the first baffle 71 and the second baffle 72 is used to switchly open the first air duct 43 connected to the first air outlet 11 and the second air duct 44 connected to the second air outlet 12, controlling the cold air and hot air to be blown out from the first air outlet 11 and the second air outlet 12 respectively, it is possible to conveniently achieve more cold air upward or horizontal air outlet and more hot air downward air outlet while ensuring sufficient return air volume. In this way, the cold air will not blow into people when cooling and the hot air can fall to the ground when heating. Therefore, the air outlet comfort of the indoor unit 10 can be effectively improved.

[0072] As an example of how the first baffle 71 and the second baffle 72 rotate to switch between opening the first air duct 43 and the second air duct 44, see Figures 1-10. A first opening 75 and a second opening 76 are provided between the first baffle 71 and the second baffle 72 on both radial sides of the impeller 3. In the first position, the first baffle 71 blocks the second air duct 44, the first opening 75 communicates with the first air duct 43, and the second opening 76 communicates with the heat exchanger 2, so that the air duct switching component 7 blocks the second air duct 44 and opens the first air duct 43 (see Figures 5 and 6). In the second position, the second baffle 72 blocks the first air duct 43, the first opening 75 communicates with the second air duct 44, and the second opening 76 communicates with the heat exchanger 2, so that the air duct switching component 7 blocks the first air duct 43 and opens the second air duct 44 (see Figures 8 and 9).

[0073] Based on the above configuration, during rotation, the first baffle 71 and the second baffle 72 alternately block the second air duct 44 and the first air duct 43. The first opening 75 between the first baffle 71 and the second baffle 72 is always connected to the open one of the second air duct 44 and the first air duct 43, and the second opening 76 between the first baffle 71 and the second baffle 72 is always connected to the heat exchanger 2. In this way, by simply rotating the air duct switching component 7 in one direction to reach the first position shown in Figures 5-7 and the second position shown in Figures 8-10, the first air duct 43 and the second air duct 44 can be opened sequentially to achieve upward or horizontal blowing of cold air and downward blowing of hot air, which is simple and convenient.

[0074] As shown in Figures 5 and 6, when the air duct switching component 7 rotates to the first position, the first baffle 71 blocks the second air duct 44, while the second baffle 72 blocks and guides the airflow on the opposite side of the first baffle 71. This not only guides the airflow from the heat exchanger 2 to flow fully towards the impeller 3, but also guides the airflow from the impeller 3 to flow fully towards the opened first air duct 43, preventing the airflow from being re-entrained by the impeller 3 and flowing into the first air duct 43. This allows more cold air to be blown upwards or horizontally from the first air outlet 11, thus effectively improving the comfort of the airflow in the cooling state and reducing energy waste.

[0075] In addition, as shown in Figures 8 and 9, when the air duct switching component 7 is rotated to the second position, the second baffle 72 blocks the first air duct 43, and the first baffle 71 blocks and guides the airflow on the opposite side of the second baffle 72. This not only guides the airflow from the heat exchanger 2 to flow fully towards the impeller 3, but also guides the airflow from the impeller 3 to flow fully towards the open second air duct 44, preventing the airflow from being re-entrained by the impeller 3 and flowing into the second air duct 44. This helps to allow more hot air to be blown downward from the first air outlet 11, thus effectively improving the comfort of the airflow in the cooling state and reducing energy waste.

[0076] As can be seen, by having the first baffle 71 and the second baffle 72 alternately block the second air duct 44 and the first air duct 43 during rotation, and by ensuring that the first opening 75 between the first baffle 71 and the second baffle 72 is always connected to the open one of the second air duct 44 and the first air duct 43, and that the second opening 76 between the first baffle 71 and the second baffle 72 is always connected to the heat exchanger 2, it is possible to conveniently control the switching of the opening of the first air duct 43 and the second air duct 44, thereby achieving upward or horizontal blowing of cold air and downward blowing of hot air. This effectively improves the comfort of airflow in cooling mode while reducing energy waste.

[0077] To further improve the airflow performance, referring to Figures 4-10, in some embodiments, the ends of the first baffle 71 and / or the second baffle 72 are provided with bent portions 73, which are sealed to the air duct assembly 4. This allows the air duct switching component 7 to better cooperate with the air duct assembly 4, reducing airflow leakage and improving the airflow performance.

[0078] Specifically, referring to Figures 5-10, in some embodiments, the sealing fit between the bent portion 73 and the air duct assembly 4 includes a sealing fit between the bent portion 73 and the first air duct component 41 and / or between the bent portion 73 and the second air duct component 42. This reduces air leakage at the first air duct 43 and / or the second air duct 44, improving the airflow effect. In particular, when the bent portion 73 is sealed to both the first air duct component 41 and the second air duct component 42, air leakage at both the first air duct 43 and the second air duct 44 can be reduced simultaneously, thus further improving the airflow effect.

[0079] The bending portion 73 can be provided on only one of the first baffle 71 and the second baffle 72, or it can be provided on both the first baffle 71 and the second baffle 72. Since the latter can use the bending portion 73 at the end of the first baffle 71 and the bending portion 73 on the second baffle 72 to seal with different positions of the air duct assembly 4, it is more conducive to reducing airflow leakage and improving the air outlet effect.

[0080] When the end of the first baffle 71 is provided with a bent portion 73, referring to Figures 5-10, in some embodiments, the bent portion 73 at the end of the first baffle 71 is in a first position sealed with the second air duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure), and / or in a second position sealed with the second air duct wall of the second air duct component 42 (i.e., the second volute 47 in the figure). Wherein, when the bent portion 73 at the end of the first baffle 71 is in a first position sealed with the second air duct wall of the first air duct component 41, leakage of airflow near the second air outlet 12 in the first position can be reduced, improving the cold air output effect; when the bent portion 73 at the end of the first baffle 71 is in a second position sealed with the second air duct wall of the second air duct component 42, leakage of airflow near the heat exchanger 2 in the second position can be reduced, improving the hot air output effect.

[0081] Additionally, when the end of the second baffle 72 is provided with a bent portion 73, referring to Figures 5-10, in some embodiments, the bent portion 73 at the end of the second baffle 72 is in a first position sealed with the first air duct wall of the first air duct component 41 (i.e., the first volute tongue 46 in the figure), and / or in a second position sealed with the first air duct wall of the second air duct component 42 (i.e., the second volute tongue 48 in the figure). Wherein, when the bent portion 73 at the end of the second baffle 72 is in a first position sealed with the first air duct wall of the first air duct component 41, leakage of airflow on the side of the first air duct 43 away from the second air outlet 12 can be reduced in the first position, improving the cold air output effect; when the bent portion 73 at the end of the second baffle 72 is in a second position sealed with the air duct wall of the second air duct component 42 away from the heat exchanger 2, leakage of airflow on the side of the second air duct 44 away from the heat exchanger 2 can be reduced in the second position, improving the hot air output effect.

[0082] Additionally, when the second baffle 72 has a bent portion 73 at its end, referring to Figure 10, in some embodiments, when in the second position, the included angle γ between the bent portion 73 at the end of the second baffle 72 and the first air duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) is 27-32°. At this time, the included angle γ between the bent portion 73 at the end of the second baffle 72 and the first air duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) is more suitable, which facilitates the two to cooperate in the heating mode to achieve a better sealing effect, reduce gas leakage, guide hot air to flow fully into the second air duct 44, and flow out from the second air outlet 12, thereby improving the hot air outlet effect.

[0083] Specifically, referring to Figure 10, in some embodiments, when in the second position, the included angle γ between the bent portion 73 at the end of the second baffle 72 and the second duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) is 28-30°. At this time, the included angle γ between the bent portion 73 at the end of the second baffle 72 and the lower duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) is more suitable, which can achieve more effective sealing, further reduce gas leakage, and improve the hot air outlet effect.

[0084] In the foregoing embodiments, the bending angle of the bending portion 73 can be set according to actual conditions. As an example, referring to Figure 7, the bending angle α of the bending portion 73 is 55-62°. In this case, the bending angle α of the bending portion 73 is appropriate, which can form a sealed fit with the air duct assembly 4, effectively reducing airflow leakage, and also prevent the sealing fit between the bending portion 73 and the air duct assembly 4 from being too tight, which would increase noise. Therefore, airflow leakage can be effectively reduced while minimizing noise.

[0085] Specifically, in some embodiments, the bending angle α of the bending portion 73 is 56 to 58°. In this case, the bending angle α of the bending portion 73 is more suitable, which is conducive to achieving a more suitable sealing fit between the bending portion 73 and the air duct assembly 4. Therefore, it is more conducive to effectively reducing airflow leakage while reducing noise.

[0086] In the foregoing embodiments, the first baffle 71 and the second baffle 72 can adopt various structural forms. Referring to Figures 4-10, in some embodiments, the first baffle 71 and / or the second baffle 72 include a first plate segment 77 and a second plate segment 78. The first plate segment 77 is connected to the bending portion 73 through the second plate segment 78, and the second plate segment 78 is recessed relative to the first plate segment 77 towards the side closer to the impeller 3. In this case, the second plate segment 78 forms a transition section between the first plate segment 77 and the bending portion 73. Its recess relative to the first plate segment 77 towards the side closer to the impeller 3 facilitates a smooth transition from the first plate segment 77 to the bending portion 73, which not only improves structural strength but also facilitates the provision of a bending portion 73 that can effectively seal and cooperate with the air duct assembly 4. Moreover, referring to Figures 5-10, the second plate segment 78 connected between the first plate segment 77 and the bending portion 73 is recessed relative to the first plate segment 77 towards the side closer to the impeller 3, so that along the airflow direction... The radial distance between the air duct switching component 7 and the impeller 3 is initially large and then gradually decreases. This allows the air duct switching component 7 to play a better role in guiding airflow. It provides more space for airflow inflow upstream, increases the air intake area, and facilitates the radial flow of airflow from the heat exchanger 2 into the impeller 3. It also gradually narrows downstream, which helps to converge and guide the airflow discharged from the impeller 3, making it easier for the airflow discharged from the impeller 3 to flow fully into the opened first air duct 43 or second air duct 44. Therefore, it is more conducive to improving the aerodynamic performance of the indoor unit 10 and improving the air outlet effect.

[0087] The shapes of the first plate segment 77 and the second plate segment 78 are not limited. As one example, referring to Figure 4, the first plate segment 77 is arc-shaped. In this case, the shape of the first plate segment 77 matches the shape of the impeller 3 more closely, facilitating a relatively stable gap with the impeller 3 during rotation. This results in a more stable air intake area for the cross-flow fan 9 during rotation, achieving a more balanced air intake effect. Alternatively, referring to Figure 4, in some embodiments, the second plate segment 78 is zigzag-shaped. In this case, the second plate segment 78 is composed of multiple non-collinear line segments. This facilitates the second plate segment 78 being recessed towards the impeller 3 relative to the first plate segment 77, and also improves the strength of the second plate segment 78, thereby increasing the strength of the duct switching component 7 and enhancing structural reliability.

[0088] In the foregoing embodiments, the first air duct wall of the second air duct component 42 (i.e., the second volute tongue 48 in the figure) and the second air duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) can be separated from each other or connected to each other. Referring to Figure 7, when the first air duct wall of the second air duct component 42 (i.e., the second volute tongue 48 in the figure) and the second air duct wall of the first air duct component 41 (i.e., the first volute 45 in the figure) are connected to each other, there is no gap between them. This makes it easier for the air duct switching component 7 to seal the other while blocking one of the first air duct 43 and the second air duct 44. In this case, referring to Figures 7 and 10, the air duct switching component 7 only needs to abut against the second volute tongue 48 and the first volute 45 at the first position via the first baffle 71. The connection point can achieve the sealing of the side of the inlet of the second air duct 44 away from the heat exchanger 2 in the first position, as well as the sealing of the side of the inlet of the first air duct 43 near the second air outlet 12. Furthermore, in the second position, the second baffle 72 can be used to abut against the connection point of the second volute tongue 48 and the first volute 45 to achieve the sealing of the side of the inlet of the first air duct 43 near the second air outlet 12 and the sealing of the side of the inlet of the second air duct 44 away from the heat exchanger 2. The structure is simple and has a good air leakage prevention effect.

[0089] In the aforementioned embodiments, referring to Figure 7, the included angle β between the first air duct wall of the second air duct component 42 (i.e., the second volute tongue 48 in the figure) and the second air duct wall of the first air duct component 41 (i.e., the first volute shell 45 in the figure) is 32-40°. At this time, the included angle β between the second volute tongue 48 and the first volute shell 45 is suitable, facilitating effective sealing and cooperation with the air duct switching component 7. In particular, it facilitates effective sealing and cooperation between the second volute tongue 48 and the first volute shell 45, which are connected to each other, and the air duct switching component 7, thereby achieving a low-risk air leakage air direction switching process.

[0090] Specifically, in some embodiments, the included angle between the first duct wall of the second duct component 42 (i.e., the second volute tongue 48 in the figure) and the second duct wall of the first duct component 41 (i.e., the first volute housing 45 in the figure) is 34-36°. In this case, the included angle between the second volute tongue 48 and the first volute housing 45 is more suitable, facilitating effective sealing and cooperation with the duct switching component 7. In particular, the second volute tongue 48 and the first volute housing 45, which are more easily connected to each other, effectively seal and cooperate with the duct switching component 7, achieving a lower risk of air leakage during the air outlet direction switching process.

[0091] As a further improvement to the aforementioned embodiments, referring to FIG2, the indoor unit 10 further includes a rotary drive mechanism 8, which is drivenly connected to the air duct switching component 7 to drive the air duct switching component 7 to rotate. Thus, under the action of the rotary drive mechanism 8, the air duct switching component 7 can automatically rotate between a first position and a second position, achieving high efficiency and accuracy. This facilitates more efficient and accurate control of the air duct switching component 7 switching between the first and second positions, better meeting the airflow requirements for both cold and hot air, and more effectively improving airflow comfort.

[0092] The rotary drive mechanism 8 can adopt various structural forms, as long as it can drive the air duct switching component 7 to rotate. As one example, referring to Figures 2-4, the rotary drive mechanism 8 includes a rack 81, a gear 82, and a power mechanism 83. The rack 81 is connected to the air duct switching component 7, the gear 82 meshes with the rack 81, and is driven by the power mechanism 83, so that the power mechanism 83 drives the air duct switching component 7 to rotate via the gear 82 and rack 81. In this case, the structure of the rotary drive mechanism 8 is relatively simple, and through the cooperation of the gear 82 and rack 81, the rotation of the air duct switching component 7 between the first and second positions can be precisely and efficiently controlled, effectively controlling the airflow direction and improving airflow comfort. In particular, when the air duct switching component 7 includes a first baffle 71 and a second baffle 72, the rack 81 can be easily connected to the first baffle 71 and the second baffle 72, allowing the rotary drive mechanism 8 to easily drive the first baffle 71 and the second baffle 72 to rotate synchronously based on a relatively simple structure.

[0093] In the foregoing embodiments, the number of return air vents 13 is not limited and can be one, two, or more. In particular, when the outer casing 1 is provided with at least two return air vents 13, it is more conducive to increasing the return air volume, so as to better maintain the freshness of indoor air, more effectively regulate indoor temperature, and improve indoor comfort.

[0094] When the outer casing 1 is provided with at least two return air vents 13, the specific location of each return air vent 13 is not limited. As an example, referring to Figure 1, the at least two return air vents 13 include two return air vents 13 that are vertically opposite each other. The two vertically opposite return air vents 13 are respectively arranged on the top plate 16 and the bottom plate 17 of the outer casing 1, so that indoor air can flow into the indoor unit 10 from the top and bottom sides. This not only helps to increase the return air volume, but also helps to achieve full contact between the return air and the heat exchanger 2, improve the heat exchange effect, increase the heat exchange efficiency, and achieve better cooling and heating effects.

[0095] Furthermore, in the aforementioned embodiments, the locations of the first air outlet 11 and the second air outlet 12 can vary. For example, in some embodiments, the first air outlet 11 is located on the top plate 16 of the outer casing 1, and / or the second air outlet 12 is located on the bottom plate 17 of the outer casing 1. As another example, referring to Figure 1, in some embodiments, the first air outlet 11 and the second air outlet 12 are located on the front plate 18 (also commonly referred to as the panel) of the outer casing 1. When the first air outlet 11 and the second air outlet 12 are located on the front plate 18 of the outer casing 1, air can be discharged forward (i.e., away from the wall where the indoor unit 10 is located), and the distance between the first air outlet 11 and the second air outlet 12 and the return air vent 13 is relatively large. The possibility of the air flowing from the first air outlet 11 and the second air outlet 12 being directly drawn back into the return air vent 13 is small. This reduces airflow waste, improves cooling and heating efficiency, and enhances the cooling and heating effect. Furthermore, the first air outlet 11 is located on the front panel 18 of the outer casing 1, rather than on the top panel 16 of the outer casing 1. This distances the first air outlet 11 from the roof, preventing excessive cold air from blowing onto the roof and thus avoiding wasted airflow, yellowing of the roof, or condensation on the roof, leading to damp floors above or damp and dripping water on the roof of this floor, affecting the living experience. Moreover, the location of the first air outlet 11 on the front panel 18 of the outer casing 1 facilitates horizontal cold air distribution, more effectively preventing cold air from blowing onto the roof. Therefore, it further reduces airflow waste, improves the living experience, and also increases the distance the cold air is delivered, improving cooling efficiency and overall cooling effect.

[0096] To better control the airflow direction of the first air outlet 11, referring to Figures 1 and 5-6, in some embodiments, a first air guide plate 51 is provided at the first air outlet 11. The first air guide plate 51 controls the opening and closing of the first air outlet 11, and when the first air outlet 11 is opened, it guides the airflow flowing out of the first air outlet 11 to flow horizontally or obliquely upward. In this way, the opening and closing of the first air outlet 11 can be controlled by the first air guide plate 51, thereby controlling whether air is discharged through the first air outlet 11. Furthermore, the first air guide plate 51 can guide the cold air flowing out of the first air outlet 11, realizing upward or horizontal cold air, preventing cold feet and hot head or direct cold air, and improving the airflow comfort in cooling mode. Figure 6 shows the case of horizontal cold air, in which the upper end of the first air guide plate 51 is rotatably connected to the outer shell 1, and the lower end rotates around the upper end, opening upward to guide the airflow horizontally, realizing horizontal cold air. However, it is understandable that the first air guide plate 51 becomes a rotating connection between the lower end and the outer shell 1, and the upper end rotates around the lower end and opens downwards, which can guide the airflow to flow obliquely upwards and realize the upward blowing of cold air.

[0097] Additionally, referring to Figures 1 and 8-9, in some embodiments, a second air guide plate 52 is provided at the second air outlet 12, and the second air guide plate 52 controls the opening and closing of the second air outlet 12. Thus, the opening and closing of the second air outlet 12 can be controlled by the second air guide plate 52, thereby controlling whether air is discharged through the second air outlet 12. Furthermore, the second air guide plate 52 can also be used to guide the airflow direction from the second air outlet 12, causing the hot air to exit obliquely downwards, achieving grounding of the hot air and improving the comfort of airflow in heating mode.

[0098] Based on the indoor units of the foregoing embodiments, this application also provides an air conditioner, which includes an indoor unit 10 of any of the embodiments.

[0099] The present application will now be further described with reference to the embodiments shown in Figures 1-10.

[0100] As shown in Figures 1-10, in this embodiment, the indoor unit 10 is a wall-mounted unit, which includes a casing 1, a heat exchanger 2, a cross-flow fan 9, a first air guide plate 51, a second air guide plate 52, a water collection tray 6, an air duct switching component 7, and a rotary drive mechanism 8.

[0101] The outer casing 1 houses the heat exchanger 2, the cross-flow fan 9, the first air guide plate 51, the second air guide plate 52, the water receiving tray 6, the air duct switching component 7, and the rotary drive mechanism 8. As shown in Figure 1, in this embodiment, the outer casing 1 is approximately cubical, comprising a top plate 16, a bottom plate 17, a front plate 18, and a rear plate 19. The top plate 16 and the bottom plate 17 are vertically opposite each other. The front plate 18 and the rear plate 19 are front-to-back opposite each other and are both connected between the top plate 16 and the bottom plate 17.

[0102] It is understandable that "up / down" and "back / forward" are defined based on the normal placement posture of the indoor unit 10 in its working state. The up / down direction is parallel to the direction of gravity, "up" is opposite to the direction of gravity, and "down" is the same as the direction of gravity. The back / forward direction is perpendicular to the wall surface on which the indoor unit 10 is mounted, with "front" away from the wall on which the indoor unit 10 is mounted and "back" close to the wall on which the indoor unit 10 is mounted. Furthermore, although not illustrated, it is easy to understand that the outer casing 1 also includes a left (left when facing the front panel) wall and a right (right when facing the front panel) wall. The left and right walls are opposite each other and are both connected to the top panel 16, bottom panel 17, front panel 18, and rear panel 19, sealing the left and right ends of the outer casing 1.

[0103] As shown in Figure 1, in this embodiment, the outer casing 1 has two return air vents 13, which are respectively located on the top plate 16 and the bottom plate 17, facing each other vertically and close to the rear plate 19 in the front-back direction. This allows for air return from the rear of the indoor unit 10 in both vertical and vertical directions, increasing the air return volume. Both return air vents 13 are always open. Furthermore, the outer casing 1 has two air outlets, namely a first air outlet 11 and a second air outlet 12, both located on the front plate 18, at the upper and lower parts of the front plate 18 respectively. Thus, the first air outlet 11 is located above the second air outlet 12, facilitating the fulfillment of different airflow requirements for both cold and hot air. Additionally, the first and second air outlets 11 are relatively far from the two return air vents 13 in the front-back direction, preventing the air from being directly drawn into the return air vents 13 and thus avoiding airflow waste.

[0104] Furthermore, as shown in Figure 1, in this embodiment, a first air guide plate 51 and a second air guide plate 52 are respectively provided at the first air outlet 11 and the second air outlet 12. The upper end of the first air guide plate 51 is rotatably connected to the upper wall of the first air outlet 11, so that the first air guide plate 51 can be rotated to open and close the first air outlet 11, controlling whether air is discharged from the first air outlet 11. When the first air outlet 11 is opened, the first air guide plate 51 extends outward from the first air outlet 11 and is in a roughly horizontal position, so that, as shown in Figure 6, under the guiding action of the first air guide plate 51, the airflow flowing out of the first air outlet 11 can flow horizontally without directly impacting the roof. In this way, the damage to the roof is smaller, the air volume loss is less, and the air delivery distance is longer. The upper end of the second air guide plate 52 is rotatably connected to the upper wall of the second air outlet 12, so that the second air guide plate 52 can be rotated to open and close the second air outlet 12 and control whether air is discharged from the second air outlet 12.

[0105] Heat exchanger 2 is disposed in the outer casing 1 and is used to exchange heat between the refrigerant and the indoor return air entering the outer casing 1 from the return air inlet 13, so as to cool or heat the return air, turning it into cold or hot air. As shown in Figure 1, in this embodiment, heat exchanger 2 divides the internal space of the outer casing 1 into a first chamber 14 and a second chamber 15. The first chamber 14 is located between heat exchanger 2 and rear plate 19, and communicates with return air inlet 13 to form an air inlet duct, so that the gas entering the outer casing 1 from return air inlet 13 can enter the first chamber 14 and flow toward heat exchanger 2. The second chamber 15 is located between heat exchanger 2 and front plate 18, and communicates with first air outlet 11 and second air outlet 12, and is used to accommodate cross-flow fan 9 and duct switching component 7, so that the airflow flowing through heat exchanger 2 can flow into the second chamber 15 under the action of cross-flow fan 9 and duct switching component 7, and exit through first air outlet 11 or second air outlet 12. Specifically, as shown in Figure 1, in this embodiment, the heat exchanger 2 includes a first heat exchange section 21 and a second heat exchange section 22. The first heat exchange section 21 and the second heat exchange section 22 are arranged sequentially from top to bottom, and the two are connected at an incline to form a V-shape protruding towards the rear plate 19. In this way, the heat exchanger 2 can fully contact and exchange heat with the return air flowing in from the upper and lower return air inlets 13, resulting in high heat exchange efficiency and good heat exchange effect.

[0106] The water receiving tray 6 is disposed in the outer casing 1 and located below the heat exchanger 2, and is used to receive water falling from the heat exchanger 2.

[0107] A cross-flow fan 9 is disposed in the second chamber 15 and is used to drive the airflow, providing power for the indoor return air flow to pass sequentially through the return air inlet 13, the heat exchanger 2, the first air outlet 11, and the second air outlet 12. As shown in Figures 1 and 2, in this embodiment, the cross-flow fan 9 includes an impeller 3 and an air duct assembly 4.

[0108] Impeller 3 is used to drive gas flow. As shown in Figures 1 and 2, in this embodiment, impeller 3 is generally cylindrical with its central axis extending in the left-right direction. It is driven by impeller drive mechanism 31 (e.g., motor 32) to rotate horizontally around its own central axis under the drive of impeller drive mechanism 31, thereby driving the airflow by radially entraining and radially discharging airflow.

[0109] The air duct assembly 4 is used to guide the airflow discharged from the impeller 3 to the first air outlet 11 and the second air outlet 12. As shown in FIG1, in this embodiment, the air duct assembly 4 includes a first air duct component 41 and a second air duct component 42.

[0110] The first air duct component 41 extends obliquely downward from the first air outlet 11 toward the impeller 3 and includes two air duct walls arranged vertically at intervals. The upper air duct wall of the first air duct component 41, which is away from the second air outlet 12, is called the first volute tongue 46, and the lower air duct wall, which is close to the second air outlet 12, is called the first volute 45. The first volute 45 and the first volute tongue 46 are located radially outward and radially inward, respectively, in the rotation direction of the impeller 3, forming a first air duct 43 between them. Thus, the first air duct component 41 is provided with a first air duct 43, which extends obliquely upward. Its upper end is connected to the first air outlet 11, and its lower end faces the impeller 3, guiding the airflow discharged from the impeller 3 obliquely upward to the first air outlet 11, from which the air is discharged.

[0111] The second air duct component 42 extends obliquely upward from the second air outlet 12 toward the impeller 3 and includes two air duct walls arranged at intervals. The upper air duct wall of the second air duct component 42, which is close to the first air outlet 11 and away from the heat exchanger 2, is called the second volute tongue 48. The lower air duct wall, which is away from the first air outlet 11 and close to the heat exchanger 2, is called the second volute 47. The second volute 47 and the second volute tongue 48 are located radially outward and radially inward, respectively, in the rotation direction of the impeller 3, forming a second air duct 44 between them. Thus, the second air duct component 42 is provided with a second air duct 44, which extends obliquely downward. Its lower end communicates with the second air outlet 12, and its upper end faces the impeller 3. It can guide the airflow discharged from the impeller 3 to flow obliquely downward to the second air outlet 12 and exit from the open second air outlet 12.

[0112] As shown in Figures 5-10, in this embodiment, the ends of the first volute 45 (i.e., the second duct wall of the first air duct component 41) and the second volute tongue 48 (i.e., the first duct wall of the second air duct component 42) near the impeller 3 are connected to each other, making the first volute 45 and the second volute tongue 48 an integral unit. This facilitates cooperation with the air duct switching component 7 to switch the outlet air duct. As shown in Figure 7, in this embodiment, both the first volute 45 and the second volute tongue 48 are inclined, with an included angle β between them, which is 36°. This allows for better cooperation with the air duct switching component 7 to block and seal the second air duct 44 and the first air duct 43, reducing the risk of air leakage.

[0113] The air duct switching component 7 is used to alternately block the second air duct 44 and the first air duct 43 to control the cold air and hot air to exit from the first air outlet 11 and the second air outlet 12, respectively. As shown in Figures 1-10, in this embodiment, the air duct switching component 7 is rotatably disposed in the second cavity 15 and includes a first baffle 71 and a second baffle 72. The first baffle 71 and the second baffle 72 are both arranged on the radially outer side of the impeller 3. At this time, the air duct switching component 7 forms a shell covering the outside of the impeller 3. Furthermore, the first baffle 71 and the second baffle 72 are opposite to each other and spaced apart from each other. The gap between them forms a first opening 75 and a second opening 76 located on the radial sides of the impeller 3. The second opening 76 and the first opening 75 allow airflow to flow in and out, respectively, forming an air intake and an air exhaust.

[0114] As shown in Figures 4-10, in this embodiment, both the first baffle 71 and the second baffle 72 include a first plate segment 77, a second plate segment 78, and a bent portion 73. The first plate segment 77, the second plate segment 78, and the bent portion 73 are connected sequentially along the direction from the second opening 76 to the first opening 75 (which is also the gas flow direction), such that the first plate segment 77 is connected to the bent portion 73 through the second plate segment 78. The bent portion 73 is located at the end of the first baffle 71 and the second baffle 72. The first plate segment 77 and the second plate segment 78 are respectively arc-shaped and zigzag-shaped, and the second plate segment 78 is concave relative to the first plate segment 77 towards the impeller 3. The bent portion 73 is located at the end of the second plate segment 78 away from the first plate segment 77 and is bent relative to the second plate segment 78, forming a U-shaped inverted structure. In this embodiment, the bent portion 73 of the first baffle 71 is bent towards the impeller 3. The bent portion 73 of the second baffle 72 is bent away from the impeller 3. The bending angle α of the bent portions 73 of the first baffle 71 and the second baffle 72 is 58°. In this way, the bent portions 73 of the first baffle 71 and the second baffle 72 can better cooperate with the air duct assembly 4, reducing air leakage.

[0115] The rotary drive mechanism 8 is driven to the air duct switching component 7 to drive the air duct switching component 7 to rotate between a first position and a second position. As shown in Figures 2-9, in this embodiment, the rotary drive mechanism 8 includes a power mechanism 83, a gear 82, and a rack 81. The power mechanism 83 (e.g., a motor 32) is driven to the gear 82, and the gear 82 meshes with the rack 81. The rack 81 is arc-shaped and connects to the first baffle 71 and the second baffle 72. Thus, the power mechanism 83 is driven to the first baffle 71 and the second baffle 72 through the gear 82 and the rack 81, which can drive the first baffle 71 and the second baffle 72 to rotate synchronously, thereby realizing the rotation of the air duct switching component 7 between the first position and the second position.

[0116] When the air duct switching component 7 is rotated to the first position and the second position respectively, the first opening 75 faces the inlets of the first air duct 43 and the second air duct 44 respectively, and is connected to the inlets of the first air duct 43 and the second air duct 44 respectively. The first baffle 71 and the second baffle 72 respectively block the inlets of the second air duct 44 and the first air duct 43. In the first position, the inlet of the second air duct 44 is blocked, preventing airflow, while the inlet of the first air duct 43 is open, allowing airflow. In the second position, the inlet of the first air duct 43 is blocked, preventing airflow, while the inlet of the second air duct 44 is open, allowing airflow. Thus, by controlling the air duct switching component 7 to rotate to the first position and the second position respectively in cooling and heating modes, cold air and hot air can be controlled to blow horizontally and downwards through the first air outlet 11 and the second air outlet 12 respectively, improving airflow comfort.

[0117] Figures 5-7 and 8-10 respectively show schematic diagrams of the indoor unit 10 in cooling and heating modes of this embodiment.

[0118] As shown in Figures 5-7, when the indoor unit 10 is in cooling mode, the air duct switching component 7 rotates to the first position. The first baffle 71 blocks the inlet of the second air duct 44, and the second baffle 72 is on the opposite side of the first baffle 71, connecting with the first air duct wall (i.e., the first volute tongue 46) of the first air duct component 41 to block and guide the airflow, so that the second opening 76 faces the heat exchanger 2, and the first opening 75 is connected to the inlet of the first air duct 43. Thus, as shown by the arrow in Figure 6, the impeller 3 rotates, which drives the return air to enter the interior of the outer casing 1 from the upper and lower return air ports 13, flows through the heat exchanger 2 for heat exchange, becomes cold air, then flows through the impeller 3, and flows through the opened first air duct 43 to the first air outlet 11, where it is horizontally discharged under the guidance of the first air guide plate 51. As shown in Figures 5-7, in this state, i.e., the first position, the bent portion 73 of the first baffle 71 abuts against the connection between the first volute 45 and the second volute tongue 48, forming a sealing fit. This not only improves the sealing tightness of the first baffle 71 at the second volute tongue 48 to the inlet of the second air duct 44, but also achieves the sealing of the inlet of the first air duct 43 at the first volute 45. At the same time, the bent portion 73 of the second baffle 72 abuts against the lower end of the first volute tongue 46, achieving the sealing of the inlet of the first air duct 43 at the first volute tongue 46. In this way, cold air is less likely to leak from the upper and lower sides of the second air duct 44 and the inlet of the first air duct 43. Therefore, it can effectively reduce air volume loss, allowing more cold air to be horizontally discharged through the first air duct 43 and the first air outlet 11, thus more effectively improving the comfort of cold air discharge.

[0119] As shown in Figures 8-10, when the indoor unit 10 is in heating mode, the air duct switching component 7 rotates to the second position, the second baffle 72 blocks the inlet of the first air duct 43, and the first baffle 71 is on the opposite side of the second baffle 72, connecting with the second air duct wall (i.e. the second volute 47) of the second air duct component 42, blocking and guiding the airflow, so that the second opening 76 faces upward and connects with the heat exchanger 2, and the first opening 75 connects with the inlet of the second air duct 44. Thus, as shown by the arrow in Figure 9, the impeller 3 rotates, which drives the return air to enter the interior of the outer casing 1 from the upper and lower return air inlets 13, flows through the heat exchanger 2 for heat exchange, becomes hot air, then flows through the impeller 3, and flows through the opened second air duct 44 to the second air outlet 12, and under the guidance of the second air guide plate 52, it is discharged obliquely downward. As shown in Figures 8-10, in this state, i.e., the second position, the bent portion 73 of the second baffle 72 abuts against the connection between the first volute 45 and the second volute tongue 48, forming a sealing fit. The included angle γ between the bent portion 73 of the second baffle 72 and the first volute 45 is 30°. This not only improves the sealing tightness of the second baffle 72 at the first volute 45 to the inlet of the first air duct 43, but also seals the inlet of the second air duct 44 at the second volute tongue 48. At the same time, the bent portion 73 of the first baffle 71 abuts against the upper end of the second volute 47, which seals the inlet of the second air duct 44 at the second volute 47. In this way, cold air is less likely to leak from the front and rear sides of the first air duct 43 and the inlet of the second air duct 44. Therefore, it can effectively reduce air volume loss and allow more hot air to be discharged obliquely downward through the second air duct 44 and the second air outlet 12. This can more effectively improve the comfort of hot air discharge.

[0120] As can be seen, the indoor unit 10 of this embodiment can easily switch air ducts by rotating the air duct switching component 7 to meet different air outlet requirements during cooling and heating. This allows the first air duct 43 to be used and the second air duct 44 to be closed during cooling, and the second air duct 44 to be used and the first air duct 43 to be closed during heating. This achieves the effect of hot air blowing downwards and cold air blowing horizontally, effectively improving air outlet comfort. Moreover, the structure is simple, the reliability is high, and it is not easy to malfunction.

[0121] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An indoor unit (10), characterized in that, include: A housing (1) is provided with a first air outlet (11), a second air outlet (12), and a return air outlet (13), the first air outlet (11) being located above the second air outlet (12); a heat exchanger (2) is disposed inside the housing (1); a cross-flow fan (9) is disposed between the heat exchanger (2) and the first air outlet (11) and the second air outlet (12) along the gas flow direction, and includes an impeller (3) and a duct assembly (4) arranged sequentially along the gas flow direction, the duct assembly (4) including a first duct component (41) and a second duct component (42), the first duct component (41) and the second duct component (42) respectively having a first duct (43) and a second duct (44), the first duct (43) communicating with the first air outlet (11), the second duct (44) communicating with the first air outlet (11), the second duct (44) communicating with the first air outlet (12), the second duct (43) communicating with the first air outlet (12 ... The duct (44) is connected to the second air outlet (12); and the duct switching component (7) is disposed inside the housing (1) and can rotate between a first position and a second position. When in the first position, the duct switching component (7) blocks the second duct (44) and opens the first duct (43) so that the impeller (3) drives the gas to flow from the return air port (13) through the heat exchanger (2) and then flows out through the first duct (43) and the first air outlet (11). When in the second position, the duct switching component (7) blocks the first duct (43) and opens the second duct (44) so ​​that the impeller (3) drives the gas to flow from the return air port (13) through the heat exchanger (2) and then flows out through the second duct (44) and the second air outlet (12).

2. The indoor unit (10) according to claim 1, characterized in that, The air duct switching component (7) includes a first baffle (71) and a second baffle (72). The first baffle (71) and the second baffle (72) are arranged at intervals on both radial sides of the impeller (3) and rotate synchronously so that the air duct switching component (7) rotates between the first position and the second position.

3. The indoor unit (10) according to claim 2, characterized in that, A first opening (75) and a second opening (76) are provided between the first baffle (71) and the second baffle (72) on both radial sides of the impeller (3). When in the first position, the first baffle (71) blocks the second air duct (44), the first opening (75) communicates with the first air duct (43), and communicates with the heat exchanger (2) through the second opening (76), so that the air duct switching component (7) blocks the second air duct (44) and opens the first air duct (43). When in the second position, the second baffle (72) blocks the first air duct (43), the first opening (75) communicates with the second air duct (44), and communicates with the heat exchanger (2) through the second opening (76), so that the air duct switching component (7) blocks the first air duct (43) and opens the second air duct (44).

4. The indoor unit (10) according to claim 2, characterized in that, The ends of the first baffle (71) and / or the second baffle (72) are provided with bent portions (73), which are sealed to the air duct assembly (4).

5. The indoor unit (10) according to claim 4, characterized in that, The bent portion (73) is in a sealed fit with the first air duct component (41) and / or the second air duct component (42).

6. The indoor unit (10) according to claim 5, characterized in that, The bent portion (73) at the end of the first baffle (71) is in a sealing fit with the second air duct wall of the first air duct component (41) at the first position, and / or in a sealing fit with the second air duct wall of the second air duct component (42) at the second position; and / or, the bent portion (73) at the end of the second baffle (72) is in a sealing fit with the first air duct wall of the first air duct component (41) at the first position, and / or in a sealing fit with the first air duct wall of the second air duct component (42) at the second position.

7. The indoor unit (10) according to claim 4, characterized in that, The bending angle α of the bending portion (73) is 55 to 62°; and / or, when in the second position, the included angle γ between the bending portion (73) at the end of the second baffle (72) and the first air duct wall of the first air duct component (41) is 27 to 32°.

8. The indoor unit (10) according to claim 7, characterized in that, The bending angle α of the bending portion (73) is 56 to 58°; and / or, when in the second position, the included angle γ between the bending portion (73) at the end of the second baffle (72) and the first air duct wall of the first air duct component (41) is 28 to 30°.

9. The indoor unit (10) according to claim 4, characterized in that, The first baffle (71) and / or the second baffle (72) include a first plate segment (77) and a second plate segment (78), the first plate segment (77) being connected to the bent portion (73) via the second plate segment (78), and the second plate segment (78) being recessed relative to the first plate segment (71) toward the side closer to the impeller (3).

10. The indoor unit (10) according to claim 9, characterized in that, The first plate segment (77) is arc-shaped; and / or the second plate segment (78) is zigzag-shaped.

11. The indoor unit (10) according to any one of claims 1-10, characterized in that, The included angle β between the first air duct wall of the second air duct component (42) and the second air duct wall of the first air duct component (41) is 32 to 40°; and / or, the first air duct wall of the second air duct component (42) and the second air duct wall of the first air duct component (41) are interconnected.

12. The indoor unit (10) according to claim 11, characterized in that, The included angle β between the first air duct wall of the second air duct component (42) and the second air duct wall of the first air duct component (41) is 34 to 36°.

13. The indoor unit (10) according to any one of claims 1-10, characterized in that, The indoor unit (10) is configured as follows: the indoor unit (10) further includes a rotary drive mechanism (8), which is drivenly connected to the air duct switching component (7) to drive the air duct switching component (7) to rotate; the outer casing (1) is provided with at least two return air vents (13); the first air outlet (11) and the second air outlet (12) are disposed on the front panel (18) of the outer casing (1); the first air outlet (11) is provided with a first air guide plate (51), which controls the opening and closing of the first air outlet (11) and guides the airflow flowing from the first air outlet (11) to flow horizontally or obliquely upward when the first air outlet (11) is opened; the second air outlet (12) is provided with a second air guide plate (52), which controls the opening and closing of the second air outlet (12).

14. The indoor unit (10) according to claim 13, characterized in that, The rotary drive mechanism (8) includes a rack (81), a gear (82), and a power mechanism (83). The rack (81) is connected to the air duct switching component (7). The gear (82) meshes with the rack (81) and is driven by the power mechanism (83), so that the power mechanism (83) drives the air duct switching component (7) to rotate through the gear (82) and the rack (81); and / or, the at least two return air inlets (13) include two return air inlets (13) that are opposite each other vertically.

15. An air conditioner, characterized in that, Including the indoor unit (10) as described in any one of claims 1-14.

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