Air conditioner indoor unit and air conditioner system

Abstract

The invention relates to an air conditioner indoor unit and an air conditioner system.The air conditioner indoor unit comprises a shell, the shell comprises a bottom wall and a side wall, a first air outlet is formed in the side wall, and a second air outlet is formed in the side, close to the first air outlet, of the bottom wall; the main heat exchanger is arranged in the shell; the auxiliary heat exchanger is arranged in the shell and located on the downstream of the main heat exchanger, and the auxiliary heat exchanger is close to at least one of the first air outlet and the second air outlet; the connecting pipe set comprises a gas pipe, a liquid pipe and a switching pipe, the liquid pipe comprises a main pipe section, a first branch pipe section and a second branch pipe section, the first branch pipe section and the second branch pipe section are communicated with the main pipe section, a first on-off valve is arranged on the first branch pipe section, a second on-off valve is arranged on the second branch pipe section, and the switching pipe is configured to introduce gas from the outdoor unit; the two ends of the heat exchange pipe of the main heat exchanger communicate with the air pipe and the first branch pipe section correspondingly, and the two ends of the heat exchange pipe of the auxiliary heat exchanger communicate with the switching pipe and the second branch pipe section correspondingly.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioning indoor unit and an air conditioning system. Background Art

[0002] At present, ducted air conditioners are the mainstream indoor terminal units of central air conditioners. They are popular among young consumers because of their beautiful installation and space-saving function.

[0003] Existing ducted air conditioner systems generally have temperature fluctuation problems during dehumidification operation, and the indoor temperature is low during humidification. At the same time, during cooling and heating operation, it is easy to produce a feeling of wind blowing directly on the human body. These problems will affect the comfort of the air conditioner indoor unit during use. Summary of the Invention

[0004] Embodiments of the present disclosure provide an air-conditioning indoor unit and an air-conditioning system, which can improve the comfort of the air-conditioning indoor unit during use.

[0005] According to one aspect of the present disclosure, an air conditioner indoor unit is provided, comprising:

[0006] The housing comprises a bottom wall and a side wall, wherein the side wall is provided with a first air outlet, and the bottom wall is provided with a second air outlet on a side close to the first air outlet;

[0007] A main heat exchanger is arranged in the shell;

[0008] an auxiliary heat exchanger disposed in the shell and downstream of the main heat exchanger, the auxiliary heat exchanger being close to at least one of the first air outlet and the second air outlet; and

[0009] The connecting pipe group includes: an air pipe, a liquid pipe, and a switching pipe. The liquid pipe includes a main pipe section and a first branch pipe section and a second branch pipe section connected to the main pipe section. The first branch pipe section is provided with a first on-off valve, and the second branch pipe section is provided with a second on-off valve. The switching pipe is configured to achieve pressure conversion.

[0010] The two ends of the heat exchange pipe of the main heat exchanger are respectively connected to the air pipe and the first branch pipe section, and the two ends of the heat exchange pipe of the auxiliary heat exchanger are respectively connected to the switching pipe and the second branch pipe section.

[0011] In some embodiments, the air conditioner indoor unit has cooling mode, heating mode and dehumidification mode.

[0012] In cooling mode, the first on-off valve is turned on, the main heat exchanger works for cooling, and the second on-off valve is turned off, the auxiliary heat exchanger does not work;

[0013] In the heating mode, the first on-off valve is turned on, the main heat exchanger works for heating, and / or the second on-off valve is turned on, the auxiliary heat exchanger works for heating;

[0014] In the dehumidification mode, the first on-off valve is turned on, the main heat exchanger works in cooling mode, and the second on-off valve is turned on, the auxiliary heat exchanger works in heating mode.

[0015] In some embodiments, the air conditioner indoor unit has a dehumidification mode. In the dehumidification mode, the main heat exchanger works in cooling mode, the auxiliary heat exchanger works in heating mode, and the heating amount is configured not to reduce the indoor temperature.

[0016] In some embodiments, the secondary heat exchanger covers the second air outlet.

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

[0018] a first air deflector, a first end of which is hinged to an edge of the first air outlet in a height direction, the first air deflector being configured to cover the first air outlet in a closed state and to rotate into the housing in an open state; and / or

[0019] The second air guide plate is hinged at the middle position of the second air outlet and can rotate in two directions.

[0020] In some embodiments, the auxiliary heat exchanger covers the second air outlet, and the first end of the first air guide plate is hinged to the bottom edge of the first air outlet and is higher than the top surface of the auxiliary heat exchanger;

[0021] Among them, when the first air guide plate rotates to form an angle with the top surface of the auxiliary heat exchanger and the second air guide plate is opened, the first air outlet and the second air outlet discharge air at the same time; when the first air guide plate rotates to completely cover the auxiliary heat exchanger, the first air outlet discharges air alone.

[0022] In some embodiments, the air conditioner indoor unit further includes:

[0023] A water receiving tray is provided in the shell and is located at the bottom of the main heat exchanger;

[0024] When the first air guide plate rotates to completely cover the auxiliary heat exchanger, the second end of the first air guide plate abuts against the edge of the water receiving tray close to the second air outlet, and the first end of the first air guide plate is not lower than the second end.

[0025] In some embodiments, the auxiliary heat exchanger covers the second air outlet, and a partition is provided on the bottom wall between the water receiving tray and the auxiliary heat exchanger. When the first air guide plate is rotated to the lower limit position, it overlaps the top of the partition so as to abut against the edge of the water receiving tray close to the second air outlet.

[0026] In some embodiments, the housing includes: a first sub-shell and a second sub-shell arranged side by side along a first direction, the first sub-shell is provided with a frame on one side along the first direction, and the second sub-shell is mounted on the frame;

[0027] The main heat exchanger and the water receiving pan are arranged in the first sub-shell, the auxiliary heat exchanger is arranged in the second sub-shell, and the first air outlet and the second air outlet are arranged in the second sub-shell.

[0028] In some embodiments, the air conditioner indoor unit has three air outlet states in cooling mode or heating mode, including:

[0029] The first air guide plate rotates to form a preset angle with the top surface of the auxiliary heat exchanger, and the second air guide plate is opened;

[0030] The first air guide is at its maximum opening angle, and the second air guide is closed; and

[0031] The first air guide plate is closed, and the second air guide plate is opened;

[0032] The auxiliary heat exchanger covers the second air outlet, the air conditioner indoor unit is in dehumidification mode, the first air guide plate is closed, and the second air guide plate is opened.

[0033] In some embodiments, the secondary heat exchanger surface has a hydrophilic coating.

[0034] In some embodiments, the air conditioner indoor unit further includes:

[0035] The fan is arranged on a side of the main heat exchanger away from the first air outlet along the first direction. The fan is located outside the shell and has an air outlet, and the air outlet extends into the shell.

[0036] In some embodiments, the air outlet is located in the upper area of ​​the shell, the main heat exchanger is plate-shaped, and the main heat exchanger is inclined from the top to the bottom toward the direction close to the first air outlet.

[0037] According to another aspect of the present disclosure, an air conditioning system is provided, including the air conditioning indoor unit of the above embodiment.

[0038] Based on the above technical solution, the air-conditioning indoor unit of the embodiment of the present invention adopts a three-pipe structure, including independent refrigeration cycle circuit, heating cycle circuit and dehumidification cycle circuit. In the dehumidification mode, the air flow is cooled and dehumidified by the main heat exchanger, and then heated by the auxiliary heat exchanger located downstream of the main heat exchanger for temperature compensation. Finally, the dehumidified air flow is heated and flows out from the air outlet close to the auxiliary heat exchanger, which can achieve a balance between dehumidification and temperature maintenance, reduce temperature fluctuations, and do not lower the indoor temperature during dehumidification, preventing the user from feeling a low temperature.

[0039] Moreover, the auxiliary heat exchanger is arranged near at least one of the first air outlet and the second air outlet. The air flow has resistance when passing through the auxiliary heat exchanger and discharging from the air outlet close to it. Fins are provided on the heat exchange tubes of the auxiliary heat exchanger, and there are channels for air flow between the fins of adjacent heat exchange tubes. The auxiliary heat exchanger is equivalent to a microporous plate, which can reduce the air outlet speed and disperse the air flow into multiple tiny streams, while realizing the dual functions of heat exchange and microporous air outlet, so as to prevent direct blowing on the human body when operating in cooling mode and heating mode, and realize windless air supply.

[0040] Therefore, this air-conditioning indoor unit can improve the user's comfort in various modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0042] Figure 1 Schematic diagram of the system principle of some embodiments of the air-conditioning indoor unit disclosed herein.

[0043] Figure 2 Schematic diagram of the structure of some embodiments of the air-conditioning indoor unit disclosed in the present invention.

[0044] Figure 3 This is a schematic diagram of some embodiments of the air-conditioning indoor unit disclosed herein in which both the first air outlet and the second air outlet are open.

[0045] Figure 4 This is a schematic diagram of some embodiments of the air-conditioning indoor unit disclosed herein, in which the first air outlet is open and the second air outlet is closed.

[0046] Figure 5 This is a schematic diagram of some embodiments of the air-conditioning indoor unit disclosed herein, in which the first air outlet is closed and the second air outlet is opened.

[0047] Description of Reference Numerals

[0048] 1', suspended ceiling; 11, first air outlet; 12, second air outlet; 13, return air outlet;

[0049] 1. Housing; 14. First sub-housing; 141. Partition; 15. Second sub-housing; 16. First air outlet; 17. Second air outlet;

[0050] 2. Fan; 21. Air inlet; 22. Air outlet;

[0051] 3. Main heat exchanger;

[0052] 4. Auxiliary heat exchanger;

[0053] 5. First on-off valve;

[0054] 6. Second on-off valve;

[0055] 7. Water tray;

[0056] 8. First air guide plate;

[0057] 9. Second air guide plate;

[0058] 10. Trachea;

[0059] 20, liquid pipe; 201, main pipe section; 202, first branch pipe section; 203, second branch pipe section;

[0060] 30. Switching tube;

[0061] x, first direction; y, second direction; z, third direction. DETAILED DESCRIPTION

[0062] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0063] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0064] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0065] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0066] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0067] Based on the above-mentioned embodiments of the present disclosure, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0068] Based on the above problems, the present disclosure proposes an air conditioner indoor unit, for example, the air conditioner indoor unit can be a duct unit. Figures 1 to 5 As shown, in some embodiments, the air conditioner indoor unit includes:

[0069] The housing 1 includes a bottom wall and a side wall. The side wall is provided with a first air outlet 16. The bottom wall is provided with a second air outlet 17 on a side close to the first air outlet 16.

[0070] The main heat exchanger 3 is arranged in the shell 1;

[0071] A secondary heat exchanger 4 is provided in the housing 1 and is located downstream of the main heat exchanger 3, and the secondary heat exchanger 4 is close to at least one of the first air outlet 16 and the second air outlet 17; and

[0072] The connecting pipe assembly includes: an air pipe 10, a liquid pipe 20, and a switching pipe 30. The liquid pipe 20 includes a main pipe section 201 and a first branch pipe section 202 and a second branch pipe section 203 connected to the main pipe section 201. The first branch pipe section 202 is provided with a first on-off valve 5, and the second branch pipe section 203 is provided with a second on-off valve 6. The switching pipe 30 is configured to achieve pressure conversion.

[0073] The two ends of the heat exchange pipe of the main heat exchanger 3 are respectively connected to the gas pipe 10 and the first branch pipe section 202 , and the two ends of the heat exchange pipe of the auxiliary heat exchanger 4 are respectively connected to the switching pipe 30 and the second branch pipe section 203 .

[0074] Specifically, the housing 1 includes a bottom wall, a top wall, and at least one side wall. The bottom wall and the top wall are spaced apart along the third direction z (height direction). The side wall is connected between the bottom wall and the top wall and is located on one side of the first direction x (width direction). A first air outlet 16 is provided on the side wall for sideways airflow. A second air outlet 17 is provided on the bottom wall near the first air outlet 16 for bottom airflow.

[0075] A heat exchange chamber is provided in the shell 1, and a main heat exchanger 3 is provided in the shell 1 for realizing the main heat exchange function. For example, the main heat exchanger can be flat, or V-shaped with an opening facing away from the first air outlet 16, or can also be other shapes.

[0076] Auxiliary heat exchanger 4 is disposed within housing 1, downstream of primary heat exchanger 3, to provide auxiliary heat exchange. Auxiliary heat exchanger 4 is located near at least one of first and second air outlets 16 and 17. As a result, after passing through primary heat exchanger 3, at least a portion of the airflow passes through auxiliary heat exchanger 4 before exiting through the outlet. Housing 1 includes first and second air outlets 16 and 17.

[0077] For example, the auxiliary heat exchanger 4 is disposed near the first air outlet 16. After the airflow passes through the main heat exchanger 3 and flows out through the first air outlet 16, at least a portion of the airflow passes through the auxiliary heat exchanger 4. The auxiliary heat exchanger 4 is disposed near the second air outlet 17. After the airflow passes through the main heat exchanger 3 and flows out through the second air outlet 17, at least a portion of the airflow passes through the auxiliary heat exchanger 4. The auxiliary heat exchanger 4 is disposed near the first air outlet 16 and the second air outlet 17. After the airflow passes through the main heat exchanger 3 and flows out through the first air outlet 16 and the second air outlet 17, at least a portion of the airflow passes through the auxiliary heat exchanger 4.

[0078] The functional priority of the main heat exchanger 3 is higher than that of the auxiliary heat exchanger 4; or the heat exchange amount achieved by the main heat exchanger 3 is higher than that of the auxiliary heat exchanger 4, for example, the heat exchange area of ​​the main heat exchanger 3 is larger than that of the auxiliary heat exchanger.

[0079] like Figure 1 As shown, the connecting pipe group includes: an air pipe 10, a liquid pipe 20, and a switching pipe 30. Among them, the air pipe 10 is used for return air, sending the refrigerant after absorbing heat back to the compressor in the outdoor unit of the air conditioning system. The first end of the air pipe 10 is connected to one end of the heat exchange pipe of the main heat exchanger 3, and the second end of the air pipe 10 is connected to the suction port of the compressor. The first end of the liquid pipe 20 is provided with two branch pipe sections, and the second end of the liquid pipe 20 is used to receive the cooled refrigerant provided by the outdoor unit. The switching pipe 30, also known as the high-low pressure pipe, can achieve high-pressure and low-pressure state conversion through valve switching to achieve compatibility between cooling mode and heating mode.

[0080] The air conditioner indoor unit of this embodiment adopts a three-pipe structure. Compared with the traditional single-pipe or double-pipe structure, it includes independent refrigeration cycle circuits, heating cycle circuits and dehumidification cycle circuits. In the dehumidification mode, the air flow is cooled and dehumidified by the main heat exchanger 3, and the temperature drops. Then, it is heated by the auxiliary heat exchanger 4 located downstream of the main heat exchanger 3 for temperature compensation. Finally, the dehumidified air flow is heated and flows out from the air outlet close to the auxiliary heat exchanger 4. This can achieve a balance between dehumidification and temperature maintenance, reduce temperature fluctuations, stabilize the indoor temperature, and not lower the indoor temperature during dehumidification, preventing the user from feeling a low temperature.

[0081] Moreover, the auxiliary heat exchanger 4 is arranged near at least one of the first air outlet 16 and the second air outlet 17. The air flow has resistance when passing through the auxiliary heat exchanger 4 and discharging from the air outlet close to it. Fins are provided on the heat exchange tubes of the auxiliary heat exchanger 4, and there are channels for air flow between the fins of adjacent heat exchange tubes. The auxiliary heat exchanger 4 is equivalent to a microporous plate, which can reduce the air outlet speed and disperse the air flow into multiple tiny streams, while realizing the dual functions of heat exchange and microporous air outlet, so as to prevent direct blowing on the human body when operating in cooling mode and heating mode, and realize windless air supply.

[0082] Therefore, this air-conditioning indoor unit can improve the user's comfort in various modes.

[0083] In some embodiments, as Figure 1 As shown, the air conditioner indoor unit has cooling mode, heating mode and dehumidification mode, wherein,

[0084] In cooling mode, the first on-off valve 5 is turned on, the main heat exchanger 3 works for cooling, and the second on-off valve 6 is turned off, the auxiliary heat exchanger 4 does not work;

[0085] In the heating mode, the first on-off valve 5 is turned on, the main heat exchanger 3 works for heating, and / or the second on-off valve 6 is turned on, the auxiliary heat exchanger 4 works for heating;

[0086] In the dehumidification mode, the first on-off valve 5 is turned on, the main heat exchanger 3 works in cooling mode, and the second on-off valve 6 is turned on, the auxiliary heat exchanger 4 works in heating mode.

[0087] For example, the first on-off valve 5 and the second on-off valve 6 may be solenoid valves, etc. The auxiliary heat exchanger 4 can only work for heating or not work.

[0088] In the cooling mode of the air-conditioning indoor unit of this embodiment, the liquid refrigerant is provided to the main heat exchanger 3 through the main pipe section 201 and the first branch pipe section 202. After evaporation and heat exchange, the gaseous refrigerant is formed and returns to the compressor through the gas pipe 10, forming a refrigeration cycle. At this time, since the switching pipe 30 draws gas from the outdoor unit, the auxiliary heat exchanger 4 does not work due to flow conflict.

[0089] In heating mode, if the main heat exchanger 3 is operating in heating mode, gaseous refrigerant is supplied to the main heat exchanger 3 via gas pipe 10. After condensation and heat exchange, it becomes liquid refrigerant and returns to the outdoor unit through the first branch pipe section 202 and the main pipe section 201, thus forming a heating cycle. If the auxiliary heat exchanger 4 is operating in heating mode, gaseous refrigerant is supplied to the auxiliary heat exchanger 4 via switching pipe 30. After condensation and heat exchange, it becomes liquid refrigerant and returns to the outdoor unit through the second branch pipe section 203 and the main pipe section 201, thus forming a heating cycle. If the main heat exchanger 3 and auxiliary heat exchanger 4 are operating in heating mode simultaneously, gaseous refrigerant is supplied to the main heat exchanger 3 and auxiliary heat exchanger 4, respectively, via gas pipe 10 and switching pipe 30. After condensation and heat exchange, it becomes liquid refrigerant and returns to the outdoor unit through liquid pipe 20. The main heat exchanger 3 and auxiliary heat exchanger 4 can independently heat the room. Their operating state depends on the user's selection based on the actual indoor heating demand, determining whether the main heat exchanger 3 and auxiliary heat exchanger 4 are operating in heating mode independently or simultaneously.

[0090] In dehumidification mode, the main heat exchanger 3 operates in cooling mode, while the auxiliary heat exchanger 4 operates in heating mode. Liquid refrigerant is supplied to the main heat exchanger 3 through the main pipe section 201 and the first branch pipe section 202. After evaporation and heat exchange, it forms a gaseous refrigerant and returns to the compressor through the gas pipe 10. Simultaneously, the gaseous refrigerant is supplied to the auxiliary heat exchanger 4 through the switching pipe 30. After condensation and heat exchange, it forms a liquid refrigerant and flows through the second branch pipe section 203 to merge with the first branch pipe section 202.

[0091] The three-pipe air-conditioning indoor unit can realize independent refrigeration cycle circuit, heating cycle circuit and dehumidification cycle circuit through the control of the first on-off valve 5 and the second on-off valve 6. Moreover, in the dehumidification mode, after the airflow passes through the main heat exchanger 3 for cooling and dehumidification, it passes through the auxiliary heat exchanger 4 located downstream of the main heat exchanger 3 for heating to perform temperature compensation. Finally, the dehumidified airflow is heated and flows out from the air outlet close to the auxiliary heat exchanger 4, which can achieve a balance between dehumidification and temperature maintenance, reduce temperature fluctuations, stabilize the indoor temperature, and do not lower the indoor temperature during dehumidification, thereby preventing users from feeling a low temperature and improving usage comfort.

[0092] In some embodiments, the air conditioner has a dehumidification mode. In this mode, the primary heat exchanger 3 operates in cooling mode, while the secondary heat exchanger 4 operates in heating mode, and the heating capacity is configured to not lower the indoor temperature. More preferably, the heating capacity of the secondary heat exchanger 4 is configured to maintain the indoor temperature within a preset range.

[0093] In this embodiment, in dehumidification mode, the airflow cools and dehumidifies after passing through the main heat exchanger 3, causing the temperature to drop. Temperature compensation can then be achieved by adjusting the downstream auxiliary heat exchanger 4, heating the dehumidified airflow. This balance between dehumidification and temperature maintenance is achieved, minimizing temperature fluctuations and stabilizing the indoor temperature. Dehumidification does not lower the indoor temperature, preventing users from experiencing a low temperature. This improves the comfort of the air conditioner indoor unit in dehumidification mode.

[0094] In some embodiments, as Figure 2 As shown, the secondary heat exchanger 4 covers the second air outlet 17 .

[0095] The auxiliary heat exchanger 4 may be a plate-shaped structure, and its width along the first direction x is consistent with the second air outlet 17 or larger than the second air outlet 17 .

[0096] In this embodiment, the auxiliary heat exchanger 4 covers the second air outlet 17. In the cooling mode, heating mode or dehumidification mode, if the air is discharged through the second air outlet 17, the heat exchange tubes of the auxiliary heat exchanger 4 are provided with fins, and there are channels for air flow between the fins of adjacent heat exchange tubes. The auxiliary heat exchanger 4 is equivalent to a microporous plate. When the airflow flows out from the second air outlet 17, the airflow can be dispersed into multiple tiny streams to achieve microporous air outlet and improve the uniformity of the air outlet; moreover, the auxiliary heat exchanger 4 can reduce the air outlet speed at the second air outlet 17, making the air outlet softer, preventing the air from blowing directly on the human body, achieving windless air supply, and improving the comfort of air supply.

[0097] For example, in cooling mode and heating mode, when the difference between the indoor temperature and the set temperature is greater than a preset threshold, the first air outlet 16 and the second air outlet 17 can be used to discharge air together to improve the heat exchange efficiency and make the indoor temperature quickly approach the set temperature; when the difference between the indoor temperature and the set temperature is less than or equal to the preset threshold, the first air outlet 16 can be closed and air can be discharged only through the second air outlet 17, which can reduce the air supply volume and make the indoor temperature reach the set temperature at a slower speed. At this time, imperceptible air discharge can be achieved, thereby improving user comfort.

[0098] Moreover, the auxiliary heat exchanger 4 covers the second air outlet 17. When the auxiliary heat exchanger 4 is not working, imperceptible air outlet can be achieved. When the auxiliary heat exchanger 4 is working for heating, heating and imperceptible air outlet can be achieved at the same time. The air flow after heating is directly discharged from the second air outlet 17, which can reduce heat loss, save energy consumption, and can more accurately control the heating amount of the auxiliary heat exchanger 4 according to the indoor temperature.

[0099] In some embodiments, as Figure 2 As shown, the air conditioner indoor unit also includes:

[0100] The first air guide plate 8 has a first end hinged to an edge of the first air outlet 16 along the height direction. The first air guide plate 8 is configured to cover the first air outlet 16 in a closed state and rotate into the housing 1 in an open state.

[0101] For example, the first air guide plate 8 can rotate around the first axis O1, and the first axis O1 extends along the second direction y.

[0102] This embodiment hinges a first air guide plate 8 at the first air outlet 16, which is relatively simple to control. When the first air guide plate 8 closes the first air outlet 16, it can improve the sealing performance, reduce air leakage, and prevent the cold air inside the shell 1 from communicating with the ambient air to produce condensation. Moreover, the first air guide plate 8 rotates toward the inside of the shell 1 and does not occupy space outside the shell 1. After being installed in the ceiling 1', it can save space and prevent collisions with other structures in the ceiling 1', thereby improving the safety of the rotation of the first air guide plate 8. In addition, by presetting the first air guide plate 8 in a position between the closed position and the extreme rotation angle, the first air guide plate 8 can play a drainage role and adjust the air output of the first air outlet 16.

[0103] In some embodiments, as Figure 2 As shown, the air conditioner indoor unit also includes:

[0104] The second air guide plate 9 is hinged to the middle position of the second air outlet 17 and can rotate in both directions.

[0105] The first air guide plate 8 and the second air guide plate 9 can be flat or curved. When the first air guide plate 8 is a flat plate, when it is rotated to the lower limit position, the airflow passing through the main heat exchanger 3 can be more smoothly delivered through the first air outlet 16, thereby maintaining the width of the air outlet channel and reducing airflow resistance.

[0106] The first air guide plate 8 and the second air guide plate 9 can extend along the second direction y (length direction). The first air outlet 16 can serve as a main air outlet, and the second air outlet 17 can serve as an auxiliary air outlet. The height of the first air outlet 16 can be greater than the width of the second air outlet 17.

[0107] The second air guide plate 9 can rotate around the second axis O2.

[0108] In this embodiment, the second air guide plate 9 is hinged to the middle position of the second air outlet 17 along the first direction x, so that the second air guide plate 9 can rotate in both directions. By adjusting the rotation angle, air supply at a larger angle can be achieved. When downward air outlet is required, the inclination angle of the second air guide plate 9 can be increased. When inclined air outlet is required, the inclination angle of the second air guide plate 9 can be reduced.

[0109] like Figure 3 As shown, the first end of the second air guide plate 9, near the first air outlet 16, is tilted downward relative to the second end. After passing through the main heat exchanger 3, the airflow can flow directly along the inner wall of the second air guide plate 9, eliminating the need for airflow reversal. This reduces airflow losses and improves indoor cooling or heating efficiency. Furthermore, the second air outlet 17 at the bottom can discharge air forward and downward, increasing the airflow range of the bottom air outlet. In cooling mode, this prevents airflow from blowing directly downward, improving airflow comfort.

[0110] like Figure 5As shown, the second end of the second air guide plate 9, away from the first air outlet 16, is tilted downward relative to the first end. After passing through the main heat exchanger 3, the airflow changes direction and flows out along the inner wall of the second air guide plate 9. This outlet angle allows the second air outlet 17 at the bottom to discharge air backward and downward, reducing the heat exchange dead zone below the air conditioner indoor unit and making the indoor temperature more uniform. Moreover, in cooling mode, after the cold air is blown out from the second air outlet 17, it can flow downward along the wall, reducing energy loss during the diffusion process, allowing the cold air to flow downward efficiently, quickly lowering the indoor temperature, and avoiding the cold air directly blowing when it freely sinks from a high altitude, so that the cold air flow can be more evenly distributed throughout the indoor space.

[0111] In some embodiments, as Figures 2 to 4 , the auxiliary heat exchanger 4 covers the second air outlet 17, and the first end of the first air guide plate 8 is hinged to the bottom edge of the first air outlet 16 and is higher than the top surface of the auxiliary heat exchanger 4;

[0112] Among them, when the first air guide plate 8 rotates to form an angle with the top surface of the auxiliary heat exchanger 4 and the second air guide plate 9 is opened, the first air outlet 16 and the second air outlet 17 discharge air at the same time; when the first air guide plate 8 rotates to completely cover the auxiliary heat exchanger 4, the first air outlet 16 discharges air alone.

[0113] For example, the first air guide plate 8 can rotate around the first axis O1, and after rotating to a horizontal position, there is a gap between it and the top surface of the auxiliary heat exchanger 4 to prevent the impact force when the first air guide plate 8 swings to the lower limit position from damaging the fins on the auxiliary heat exchanger 4.

[0114] Optionally, the first air guide plate 8 is hinged to the top of the first air outlet 16 , and when air is discharged through the first air outlet 16 , the first air guide plate 8 rotates upward until it abuts against the top wall of the housing 1 .

[0115] In this embodiment, when the auxiliary heat exchanger 4 covers the second air outlet 17, the first air guide plate 8 is hinged to the bottom of the first air outlet 16. Figure 3 As shown. In cooling mode or heating mode, if the second air guide plate 9 is open and the first air guide plate 8 is rotated to a preset angle with the top surface of the auxiliary heat exchanger 4, such as the area between the closed position and the lower limit position, the airflow passing through the main heat exchanger 3 can be discharged from the first air outlet 16 through the channel between the first air guide plate 8 and the top wall. It can also flow into the channel between the first air guide plate 8 and the auxiliary heat exchanger 4 and out of the second air outlet 17 after passing through the auxiliary heat exchanger 4, achieving simultaneous air discharge from the first air outlet 16 and the second air outlet 17. At this time, the first air guide plate 8 plays a role in guiding the airflow, guiding the airflow to flow smoothly through the two air outlets.

[0116] like Figure 4As shown, when the first air guide plate 8 is rotated to completely cover the auxiliary heat exchanger 4, that is, the second end of the first air guide plate 8 reaches position c, the first air guide plate 8 is equivalent to covering the second air outlet 17, allowing air to flow out of the first air outlet 16 alone. At this time, there is no requirement for the second air guide plate 9 to be closed, which simplifies the difficulty of air guide plate control. If the second air guide plate 9 is also closed, it prevents airflow passing through the main heat exchanger 3 from entering the gap of the auxiliary heat exchanger 4, thereby reducing airflow loss. In cooling mode, the double-layer air guide plate provides excellent thermal insulation and prevents condensation.

[0117] like Figure 5 As shown, when the second end of the first air guide plate 8 rotates to the position d, the first air outlet 16 is closed.

[0118] In some embodiments, as Figure 4 As shown, the air conditioner indoor unit also includes:

[0119] A water receiving tray 7 is provided in the housing 1 and is located at the bottom of the main heat exchanger 3;

[0120] When the first air guide plate 8 rotates to completely cover the auxiliary heat exchanger 4, the second end of the first air guide plate 8 abuts against the edge of the water receiving tray 7 near the second air outlet 17, and the first end of the first air guide plate 8 is not lower than the second end.

[0121] For example, the second end of the first air guide plate 8 can be overlapped on the upper part of the water receiving tray 7 near the second air outlet 17 without affecting the flexible rotation of the first air guide plate 8.

[0122] This embodiment is based on a structure in which the first end of the first air guide plate 8 is hinged to the bottom edge of the first air outlet 16. When the first air guide plate 8 is rotated to the lower limit position to completely cover the auxiliary heat exchanger 4, it not only closes the second air outlet 17 and prevents airflow from passing through the auxiliary heat exchanger 4, but also overlaps with the water receiving pan 7. When condensed water is generated at the first air outlet 16, it can fall onto the back of the first air guide plate 8. If the condensed water is large, it can flow into the water receiving pan 7, preventing the condensed water from dripping outward. Furthermore, a guide groove can be provided on the back of the first air guide plate 8 to guide the condensed water into the water receiving pan 7.

[0123] In some embodiments, as Figure 2 and Figure 4 As shown, the auxiliary heat exchanger 4 covers the second air outlet 17, and a partition 141 is provided on the bottom wall between the water receiving tray 7 and the auxiliary heat exchanger 4. When the first air guide plate 8 is rotated to the lower limit position, it overlaps the top of the partition 141 so as to abut against the edge of the water receiving tray 7 close to the second air outlet 17.

[0124] For example, the top of the partition 141 can be lower than the edge of the water receiving tray 7, so that when the second end of the first air guide plate 8 is overlapped on the partition 141, it can be flush with the edge of the water receiving tray 7, allowing condensed water to flow in smoothly.

[0125] This embodiment provides a partition 141 between the water receiving pan 7 and the auxiliary heat exchanger 4. In the cooling mode, the temperature of the condensed water in the water receiving pan 7 is low. The partition 141 is equivalent to a cold insulation structure, which can reduce the heat transfer between the water receiving pan 7 and the second air outlet 17, and cut off the cold bridge between the water receiving pan 7 and the second air outlet 17, thereby reducing the impact of the low temperature of the water receiving pan 7 on the bottom air outlet and reducing condensation dripping when the bottom air outlet is discharged, thereby improving user experience.

[0126] In some embodiments, as Figure 2 As shown, the housing 1 includes: a first sub-shell 14 and a second sub-shell 15 arranged side by side along a first direction x, the first sub-shell 14 is provided with a frame on one side along the first direction x, and the second sub-shell 15 is mounted on the frame. For example, the frame can be provided along the entire circumference of the first sub-shell 14;

[0127] The main heat exchanger 3 and the water receiving pan 7 are disposed in the first sub-shell 14 , the auxiliary heat exchanger 4 is disposed in the second sub-shell 15 , and the first air outlet 16 and the second air outlet 17 are provided in the second sub-shell 15 .

[0128] In this embodiment, the housing 1 is configured as a split structure. During assembly, the main heat exchanger 3 and the water receiving tray 7 can be installed in the first sub-shell 14, and the auxiliary heat exchanger 4 can be installed in the second sub-shell 15. The two parts are then docked, which can improve assembly efficiency. At the same time, the partition 141 is directly formed through the frame.

[0129] In some embodiments, the air conditioner indoor unit has three air outlet states in cooling mode or heating mode, including:

[0130] The first air guide plate 8 rotates to a preset angle with the top surface of the auxiliary heat exchanger 4, and the second air guide plate 9 is opened. Figure 3 ;

[0131] The first air guide plate 8 is at the maximum limit opening angle, and the second air guide plate 9 is closed. Figure 4 ;and

[0132] The first air guide plate 8 is closed, and the second air guide plate 9 is opened, refer to Figure 5 .

[0133] The auxiliary heat exchanger 4 covers the second air outlet 17 , the air conditioner indoor unit is in the dehumidification mode, the first air guide plate 8 is closed, and the second air guide plate 9 is opened.

[0134] In this embodiment, in cooling mode and heating mode, one or both of the first air guide plate 8 and the second air guide plate 9 can be flexibly opened. For example, when the heat exchange demand is large, both air guide plates can be opened at the same time. When the heat exchange demand is small, only one of the air guide plates can be opened. In addition, which air guide plate to open can be determined according to the air outlet direction desired by the user, such as to achieve side air outlet or bottom air outlet.

[0135] In heating mode, by opening the second air guide plate 9, downward air flow can be achieved, allowing hot air to flow downward quickly, achieving rapid heating. Alternatively, both the first air guide plate 8 and the second air guide plate 9 can be opened to achieve long-distance air supply and downward air supply at the same time.

[0136] In cooling mode, opening the first air deflector 8 allows air to be discharged from the cooling side, allowing the cool air to travel a greater distance and achieve rapid indoor cooling. Alternatively, opening both the first and second air deflectors 8 and 9 allows for both long-range and downward air delivery. If direct airflow is undesirable, the second air deflector 9 can be closed.

[0137] In the dehumidification mode, the airflow after cooling and dehumidification is preferably passed through the auxiliary heat exchanger 4. Since the auxiliary heat exchanger 4 covers the second air outlet 17, the second air guide plate 9 is opened and the first air guide plate 8 is closed in the dehumidification mode. Figure 5 ,Independent loop design avoids functional conflicts and improves system efficiency.

[0138] In some embodiments, the surface of the secondary heat exchanger 4 has a hydrophilic coating.

[0139] This embodiment provides a hydrophilic coating on the surface of the auxiliary heat exchanger 4, which can promote the condensation of water molecules on the surface and enhance the dehumidification efficiency.

[0140] In some embodiments, as Figure 2 As shown, the air conditioner indoor unit also includes:

[0141] The fan 2 is provided on a side of the main heat exchanger 3 away from the first air outlet 16 along the first direction x. The fan 2 is located outside the housing 1 and has an air outlet 22 , which extends into the housing 1 .

[0142] The fan 2 has an air inlet 21 and an air outlet 22. For example, the fan 2 is a centrifugal fan, and the air inlet 21 is at the end of the centrifugal fan along the axis. The center line of the fan 2 extends along the second direction y. The centrifugal fan includes a volute and blades.

[0143] In this embodiment, the fan 2 is arranged outside the shell 1, and only the air outlet 22 is connected to the side wall of the shell 1 opposite to the first air outlet 16. Compared with the traditional air-conditioning indoor unit, the fan blade size of the fan 2 can be increased when the external dimensions of the air-conditioning indoor unit are constant. There is no need to arrange the fan 2 as a whole inside the shell 1, and a larger air output can be obtained.

[0144] In some embodiments, the air outlet 22 is located in the upper area of ​​the housing 1 , the main heat exchanger 3 is plate-shaped, and the main heat exchanger 3 is inclined from the top to the bottom toward the direction close to the first air outlet 16 .

[0145] The main heat exchanger 3 of this embodiment is configured to be plate-shaped, and the bottom end is inclined toward the first air outlet 16, which can increase the heat exchange area. After the air flow flows out from the air outlet 22 at the top, it flows directly along the surface of the main heat exchanger 3 and gradually passes through the main heat exchanger 3, which is conducive to more sufficient heat exchange and enables the air flow out of the fan 2 to better cover the bottom area of ​​the main heat exchanger 3, making the heat exchange in various parts of the main heat exchanger 3 more uniform.

[0146] The indoor unit of the air conditioner disclosed herein may be a duct unit, such as Figure 2 As shown, the duct unit is installed in the suspended ceiling 1', and a return air outlet 13, a first air outlet 11, and a second air outlet 12 can be provided on the suspended ceiling 1'. The first air outlet 11 is provided on a side panel of the suspended ceiling 1', and the first air outlet 11 is provided opposite the first air outlet 16; the second air outlet 12 is provided on the bottom plate of the suspended ceiling 1', and the second air outlet 12 is provided opposite the second air outlet 17. For example, grilles can be provided for the first air outlet 11 and the second air outlet 12. The return air outlet 13 can be provided on the side panel of the suspended ceiling 1', and the return air outlet 13 can be provided on the same side panel as the first air outlet 11. The decoration style of the entire air outlet is more simple and elegant, which not only reduces the installation cost, but also makes the installation effect more simple and beautiful. Optionally, the return air outlet 13 can also be provided on the side panel of the suspended ceiling 1' opposite to the first air outlet 11, or on the bottom plate near the fan 2.

[0147] Secondly, the present disclosure provides an air-conditioning system, including the air-conditioning indoor unit of the above embodiment.

[0148] The air conditioning system of this embodiment adopts a three-pipe structure, including independent refrigeration cycle circuits, heating cycle circuits and dehumidification cycle circuits. In the dehumidification mode, the temperature of the airflow drops after passing through the main heat exchanger 3 for cooling and dehumidification. Then, it passes through the auxiliary heat exchanger 4 located downstream of the main heat exchanger 3 for heating to compensate for the temperature. Finally, the dehumidified airflow is heated and flows out from the air outlet close to the auxiliary heat exchanger 4, which can achieve a balance between dehumidification and temperature maintenance, reduce temperature fluctuations, stabilize the indoor temperature, and do not lower the indoor temperature during dehumidification to prevent users from feeling a low temperature.

[0149] Moreover, the auxiliary heat exchanger 4 is arranged near at least one of the first air outlet 16 and the second air outlet 17. The air flow has resistance when passing through the auxiliary heat exchanger 4 and discharging from the air outlet close to it. The auxiliary heat exchanger 4 is equivalent to a microporous plate, which can reduce the air outlet speed and disperse the air flow into multiple tiny streams, while realizing the dual functions of heat exchange and microporous air outlet, so as to prevent direct blowing on the human body when operating in cooling mode and heating mode, and realize windless air supply.

[0150] Therefore, this air-conditioning system can improve the comfort of users in various modes.

[0151] The above is a detailed introduction to an air-conditioning indoor unit and air-conditioning system provided by the present disclosure. Specific embodiments are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present disclosure. It should be noted that, for those skilled in the art, various improvements and modifications may be made to the present disclosure without departing from the principles of the present disclosure, and such improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing (1) comprises a bottom wall and a side wall, wherein the side wall is provided with a first air outlet (16), and the bottom wall is provided with a second air outlet (17) on a side close to the first air outlet (16); A main heat exchanger (3) is arranged in the shell (1); an auxiliary heat exchanger (4) disposed in the housing (1) and downstream of the main heat exchanger (3), the auxiliary heat exchanger (4) being close to at least one of the first air outlet (16) and the second air outlet (17); and A connecting pipe group comprises: an air pipe (10), a liquid pipe (20) and a switching pipe (30); the liquid pipe (20) comprises a main pipe section (201) and a first branch pipe section (202) and a second branch pipe section (203) in communication with the main pipe section (201); the first branch pipe section (202) is provided with a first on-off valve (5); the second branch pipe section (203) is provided with a second on-off valve (6); and the switching pipe (30) is configured to achieve pressure conversion; The two ends of the heat exchange tube of the main heat exchanger (3) are respectively connected to the air pipe (10) and the first branch pipe section (202), and the two ends of the heat exchange tube of the auxiliary heat exchanger (4) are respectively connected to the switching pipe (30) and the second branch pipe section (203).

2. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit has a cooling mode, a heating mode and a dehumidification mode, wherein: In the cooling mode, the first on-off valve (5) is turned on, the main heat exchanger (3) operates in cooling mode, and the second on-off valve (6) is turned off, the auxiliary heat exchanger (4) does not operate; In the heating mode, the first on-off valve (5) is turned on, the main heat exchanger (3) operates for heating, and / or the second on-off valve (6) is turned on, the auxiliary heat exchanger (4) operates for heating; In the dehumidification mode, the first on-off valve (5) is turned on, the main heat exchanger (3) operates in cooling mode, and the second on-off valve (6) is turned on, the auxiliary heat exchanger (4) operates in heating mode.

3. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit has a dehumidification mode. In the dehumidification mode, the main heat exchanger (3) works in cooling mode, and the auxiliary heat exchanger (4) works in heating mode, and the heating amount is configured not to reduce the indoor temperature.

4. The air conditioner indoor unit according to claim 1, characterized in that: The auxiliary heat exchanger (4) covers the second air outlet (17).

5. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that: Also includes: a first air guide plate (8), a first end of which is hinged to an edge of the first air outlet (16) in a height direction, the first air guide plate (8) being configured to cover the first air outlet (16) in a closed state and to rotate into the housing (1) in an open state; and / or The second air guide plate (9) is hinged to the middle position of the second air outlet (17) and can rotate in both directions.

6. The air conditioner indoor unit according to claim 5, characterized in that: The auxiliary heat exchanger (4) covers the second air outlet (17), and the first end of the first air guide plate (8) is hinged to the bottom edge of the first air outlet (16) and is higher than the top surface of the auxiliary heat exchanger (4); Wherein, when the first air guide plate (8) is rotated to form an angle with the top surface of the auxiliary heat exchanger (4) and the second air guide plate (9) is opened, the first air outlet (16) and the second air outlet (17) discharge air simultaneously; when the first air guide plate (8) is rotated to completely cover the auxiliary heat exchanger (4), the first air outlet (16) discharges air alone.

7. The air conditioner indoor unit according to claim 5, characterized in that: Also includes: a water receiving tray (7) disposed in the housing (1) and located at the bottom of the main heat exchanger (3); Wherein, when the first air guide plate (8) is rotated to completely cover the auxiliary heat exchanger (4), the second end of the first air guide plate (8) abuts against the edge of the water receiving tray (7) close to the second air outlet (17), and the first end of the first air guide plate (8) is not lower than the second end.

8. The air conditioner indoor unit according to claim 7, characterized in that: The auxiliary heat exchanger (4) covers the second air outlet (17), and the bottom wall is provided with a partition (141) between the water receiving tray (7) and the auxiliary heat exchanger (4). When the first air guide plate (8) is rotated to the lower limit position, it overlaps the top end of the partition (141) so as to abut against the edge of the water receiving tray (7) close to the second air outlet (17).

9. The air conditioner indoor unit according to claim 8, characterized in that: The housing (1) comprises: a first sub-shell (14) and a second sub-shell (15) arranged side by side along a first direction (x); the first sub-shell (14) is provided with a frame on one side along the first direction (x); and the second sub-shell (15) is mounted on the frame; The main heat exchanger (3) and the water receiving tray (7) are arranged in the first sub-shell (14), the auxiliary heat exchanger (4) is arranged in the second sub-shell (15), and the first air outlet (16) and the second air outlet (17) are arranged in the second sub-shell (15).

10. The air conditioner indoor unit according to claim 5, characterized in that: The air conditioner indoor unit has three air outlet states in cooling mode or heating mode, including: The first air guide plate (8) is rotated to form a preset angle with the top surface of the auxiliary heat exchanger (4), and the second air guide plate (9) is opened; The first air guide plate (8) is at a maximum limit opening angle, and the second air guide plate (9) is closed; and The first air guide plate (8) is closed, and the second air guide plate (9) is opened; The auxiliary heat exchanger (4) covers the second air outlet (17), the air conditioner indoor unit is in dehumidification mode, the first air guide plate (8) is closed, and the second air guide plate (9) is opened.

11. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that: The surface of the auxiliary heat exchanger (4) is provided with a hydrophilic coating.

12. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that: Also includes: A fan (2) is arranged on a side of the main heat exchanger (3) away from the first air outlet (16) along a first direction (x), the fan (2) is located outside the shell (1), the fan (2) has an air outlet (22), and the air outlet (22) extends into the shell (1).

13. The air conditioner indoor unit according to claim 12, characterized in that: The air outlet (22) is located in the upper area of ​​the shell (1), the main heat exchanger (3) is plate-shaped, and the main heat exchanger (3) is inclined from the top to the bottom toward the direction close to the first air outlet (16).

14. An air conditioning system, characterized in that: The invention comprises the air-conditioning indoor unit according to any one of claims 1 to 13.

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