Air conditioner indoor unit

Abstract

The present invention discloses an indoor unit of an air conditioner, comprising: a housing; a heat exchanger; an indoor fan; a heater for heating the heat exchange air; a flexible air deflector which can be helically deformed and is used for controlling the flow direction of the heat exchange air; a driving device; a fresh air fan; a sensing unit for detecting the temperature of the heat exchange air, the wind speed of the heat exchange air, the temperature of the fresh air, the wind speed of the fresh air and the indoor temperature; a controller respectively connected to the fresh air fan, the indoor fan, the flexible air deflector, the heater and the sensing unit; when a fresh air function opening signal is obtained in the heating mode, calculating the influence degree level of the outdoor fresh air on the indoor temperature according to the temperature of the heat exchange air, the wind speed of the heat exchange air, the temperature of the fresh air, the wind speed of the fresh air and the indoor temperature, and adjusting the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the switch of the heater and the helical deformation angle of the flexible air deflector according to the influence degree level. The indoor unit of the air conditioner according to the embodiment of the present invention can avoid the direct blowing of the fresh air cold wind on the user, avoid the generation of condensation, and has comfortable air supply.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an indoor unit of an air conditioner. Background Art

[0002] In the related art, the indoor unit of an air conditioner can usually purify the indoor air by introducing outdoor fresh air. However, when the outdoor environmental temperature is relatively low, introducing outdoor fresh air will increase the cooling load in the room, and the direct blowing of outdoor fresh air on users will cause a cold feeling, resulting in a poor user experience. In some technologies, the outdoor fresh air and the air-conditioning air after heat exchange are mixed inside the indoor unit of the air conditioner, and the mixed air is discharged into the room after the temperature of the outdoor fresh air is increased. However, this is likely to cause condensation inside the indoor unit of the air conditioner, and there is interference between the fresh air and the air-conditioning air, resulting in an increase in the resistance of the fresh air, a decrease in the fresh air output, and a lower comfort level of the air output of the air conditioner. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an indoor unit of an air conditioner, which can avoid the direct blowing of fresh air and cold air on users and avoid condensation, and has the advantage of comfortable air supply.

[0004] To achieve the above object, according to an embodiment of the present invention, an indoor unit of an air conditioner is provided, including: a housing having an indoor air inlet, an indoor air outlet, a fresh air inlet, and a fresh air outlet; a heat exchanger installed in the housing; an indoor fan installed in the housing for guiding indoor air to enter the housing from the indoor air inlet, exchanging heat with the heat exchanger to form heated air, and then discharging the heated air from the indoor air outlet; a heater installed in the housing for heating the heated air; a flexible air deflector rotatably installed at the indoor air outlet of the housing, and the flexible air deflector can be helically deformed to form a helical structure to control the flow direction of the heated air; a driving device installed in the housing and drivingly connected to one end of the flexible air deflector to drive one end of the flexible air deflector to rotate relative to the other end, so that the flexible air deflector is helically deformed; a fresh air fan installed in the housing for guiding outdoor fresh air to flow from the fresh air inlet to the fresh air outlet; a sensing unit installed in the housing for detecting the temperature of the heated air, the wind speed of the heated air, the temperature of the fresh air, the wind speed of the fresh air, and the indoor temperature; a controller installed in the housing and connected to the fresh air fan, the indoor fan, the flexible air deflector, the driving device, the heater, and the sensing unit respectively; the controller is configured to, when the air conditioner is in the heating mode and a fresh air function start signal is obtained, calculate the influence degree level of the outdoor fresh air on the indoor temperature according to the temperature of the heated air, the wind speed of the heated air, the temperature of the fresh air, the wind speed of the fresh air, and the indoor temperature, and adjust the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the switch of the heater, and the helical deformation angle of the flexible air deflector according to the influence degree level.

[0005] The indoor unit of the air conditioner according to the embodiment of the present invention can avoid the direct blowing of fresh air cold wind on users and avoid the generation of condensation, and has the advantage of comfortable air supply.

[0006] According to some embodiments of the present invention, the indoor unit of the air conditioner further includes: a support member, the support member is inserted through the flexible air deflector and rotatably installed at the indoor air outlet, and the support member can rotate with the torsion of the flexible air deflector; a mounting plate, the mounting plate is arranged in the housing, and the support member is rotatably arranged on the mounting plate; wherein, the mounting plate is provided with a circular opening, the support member is a circular disc, and the circular disc is installed in the circular opening and rotatably matched with the circular opening.

[0007] According to some embodiments of the present invention, the flexible air deflector includes: a plurality of flexible connectors linearly arranged, the support member is disposed in the middle of the plurality of flexible connectors and the plurality of flexible connectors penetrate the support member; a plurality of air guiding vanes, the plurality of air guiding vanes are movably connected in series on the plurality of flexible connectors, and the plurality of flexible connectors can drive the plurality of air guiding vanes to twist.

[0008] According to some embodiments of the present invention, the air guiding vane includes: a vane body and a rotating shaft. The rotating shaft is provided with the rotatable vane body on opposite sides in its radial direction. The rotating shaft is provided with a first through hole in its axial direction, and the vane body is provided with a second through hole along the axial direction of the rotating shaft. The plurality of flexible connectors respectively penetrate the second through hole and the first through hole.

[0009] According to some embodiments of the present invention, the driving device includes: a rotor assembly, the rotor assembly includes a fixed shell, a slider and an elastic member. A chute with a notch facing the side of the flexible connector is provided in the fixed shell. The slider is movably disposed in the chute and fixedly connected to the flexible connector. The elastic member is disposed in the chute and sleeved on the flexible connector. Two ends of the elastic member respectively abut against the slider and one end of the chute facing the flexible connector; a driving motor, the driving motor is in transmission connection with the rotor assembly.

[0010] According to some embodiments of the present invention, the flexible air deflector extends in the horizontal direction. The fresh air outlet and the indoor air outlet are provided on the front side of the housing and are spaced apart in the horizontal direction. The driving device is installed on the housing and is in transmission connection with one end of the flexible air deflector close to the fresh air outlet. The driving device drives one end of the flexible air deflector close to the fresh air outlet to rotate, so that the flexible air deflector is helically deformed; wherein, the flexible air deflector has a limit spiral angle. When the spiral deformation angle of the flexible air deflector is not greater than the limit spiral angle, the air volume flowing in the direction of the fresh air outlet of the heat exchange air is proportional to the spiral deformation angle of the flexible air deflector.

[0011] According to some embodiments of the present invention, calculating the influence degree level of the outdoor fresh air on the indoor temperature according to the heat exchange air temperature, the heat exchange air velocity, the fresh air temperature, the fresh air velocity and the indoor temperature includes: the heat exchange air temperature is T1, the heat exchange air velocity is V1, the fresh air temperature is T2, the fresh air velocity is V2, and the indoor temperature is T3;

[0012]

[0013] When the value of A is not greater than 10%, the influence degree level is the first level; when the value of A is greater than 10% and not greater than 30%, the influence degree level is the second level; when the value of A is greater than 30% and not greater than 50%, the influence degree level is the third level; when the value of A is greater than 50%, the influence degree level is the fourth level; wherein, the greater the influence degree level is, the greater the influence of the outdoor fresh air on the indoor temperature is.

[0014] According to some embodiments of the present invention, adjusting the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the power of the heater, and the spiral deformation angle of the flexible air deflector according to the influence degree level includes: if the influence degree level is the first level, the heater is turned off, the fresh air fan operates at the first fresh air rotation speed, the indoor fan operates at the first rotation speed, and the flexible air deflector is spirally deformed by the first angle; if the influence degree level is the second level, the heater is turned off, the fresh air fan operates at the second fresh air rotation speed, the indoor fan operates at the second rotation speed, and the flexible air deflector is spirally deformed by the second angle; if the influence degree level is the third level, the heater is turned on, the fresh air fan operates at the third fresh air rotation speed, the indoor fan operates at the third rotation speed, and the flexible air deflector is spirally deformed by the second angle; if the influence degree level is the fourth level, the heater is turned on, the fresh air fan operates at the fourth fresh air rotation speed, the indoor fan operates at the fourth rotation speed, and the flexible air deflector is spirally deformed by the third angle; wherein, the first rotation speed, the second rotation speed, the third rotation speed, and the fourth rotation speed increase in sequence; the first fresh air rotation speed, the second fresh air rotation speed, the third fresh air rotation speed, and the fourth fresh air rotation speed decrease in sequence; the first angle, the second angle, and the third angle increase in sequence and are not greater than the limit spiral angle.

[0015] According to some embodiments of the present invention, if the influence degree level is the third level, the heater operates at the first power; if the influence degree level is the fourth level, the heater operates at the second power; wherein, the first power is less than the second power.

[0016] According to some embodiments of the present invention, the second power is the rated power of the heater; the fourth rotation speed is the rated rotation speed of the indoor fan; the first fresh air rotation speed is the rated rotation speed of the fresh air fan; the third angle is equal to the limit spiral angle.

[0017] According to some embodiments of the present invention, the indoor unit of the air conditioner further includes: a CO2 detection unit, the CO2 detection unit is installed on the housing and is used for detecting the indoor CO2 concentration; wherein, the controller is configured to, after obtaining the fresh air function opening signal, turn on the fresh air function until the indoor CO2 concentration is not greater than the preset CO2 concentration, and then turn off the fresh air function.

[0018] According to some embodiments of the present invention, the controller is configured to: if the influence degree level is the first level, detect the indoor CO2 concentration after the fresh air function is turned on for a first preset time; if the influence degree level is the second level, detect the indoor CO2 concentration after the fresh air function is turned on for a second preset time; if the influence degree level is the third level, detect the indoor CO2 concentration after the fresh air function is turned on for a third preset time; if the influence degree level is the fourth level, detect the indoor CO2 concentration after the fresh air function is turned on for a fourth preset time; wherein, the first preset time, the second preset time, the third preset time, and the fourth preset time are shortened in sequence.

[0019] According to some embodiments of the present invention, the controller is configured to, if the influence degree level is the fourth level, the heater operates at a second power, the fresh air fan operates at a fourth fresh air speed, the indoor fan operates at a fourth speed, and after the flexible air deflector is spirally deformed by a third angle, if the difference between the outdoor fresh air temperature and the indoor temperature is not less than a preset temperature difference, increase the operating frequency of the compressor of the air conditioner.

[0020] According to some embodiments of the present invention, if the current operating frequency of the compressor of the air conditioner is not less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor of the air conditioner is adjusted to the rated frequency of the compressor of the air conditioner; if the current operating frequency of the compressor of the air conditioner is less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor of the air conditioner is increased by 20% of the rated frequency of the compressor of the air conditioner.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a flowchart of the indoor unit of the air conditioner according to an embodiment of the present invention.

[0024] Figure 2 is a flowchart of the operation of the fresh air function of the indoor unit of the air conditioner according to an embodiment of the present invention.

[0025] Figure 3 is a flowchart when the influence degree level of the indoor unit of the air conditioner according to an embodiment of the present invention is the first level.

[0026] Figure 4It is a flowchart when the influence degree level of the indoor unit of the air conditioner in the embodiment of the present invention is level two.

[0027] Figure 5 It is a flowchart when the influence degree level of the indoor unit of the air conditioner in the embodiment of the present invention is level three.

[0028] Figure 6 It is a flowchart when the influence degree level of the indoor unit of the air conditioner in the embodiment of the present invention is level four.

[0029] Figure 7 It is a flowchart when the heater of the indoor unit of the air conditioner in the embodiment of the present invention operates at the first power.

[0030] Figure 8 It is a flowchart when the heater of the indoor unit of the air conditioner in the embodiment of the present invention operates at the second power.

[0031] Figure 9 It is a flowchart for increasing the compressor frequency of the indoor unit of the air conditioner in the embodiment of the present invention.

[0032] Figure 10 It is another flowchart for increasing the compressor frequency of the indoor unit of the air conditioner in the embodiment of the present invention.

[0033] Figure 11 It is yet another flowchart for increasing the compressor frequency of the indoor unit of the air conditioner in the embodiment of the present invention.

[0034] Figure 12 It is a schematic structural diagram of the indoor unit of the air conditioner in the embodiment of the present invention.

[0035] Figure 13 It is a schematic structural diagram of the flexible air deflector and the driving device of the indoor unit of the air conditioner in the embodiment of the present invention.

[0036] Figure 14 It is a schematic structural diagram of the flexible air deflector of the indoor unit of the air conditioner in the embodiment of the present invention.

[0037] Figure 15 It is a schematic structural diagram of the air deflector blades of the indoor unit of the air conditioner in the embodiment of the present invention.

[0038] Figure 16 It is a sectional view of the air deflector blades of the indoor unit of the air conditioner in the embodiment of the present invention.

[0039] Figure 17 It is an exploded view of the flexible air deflector and the driving device of the indoor unit of the air conditioner in the embodiment of the present invention.

[0040] Figure 18 It is a schematic structural diagram of the fixed shell of the indoor unit of the air conditioner in the embodiment of the present invention.

[0041] Figure 19 It is a cross-sectional view of the flexible air deflector and the driving device of the indoor unit of the air conditioner according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] 1. Indoor unit of the air conditioner;

[0044] 100. Housing; 110. Indoor air outlet; 120. Fresh air outlet;

[0045] 200. Flexible air deflector; 210. Flexible connecting member; 220. Air deflector blade; 230. Blade body; 231. Second through hole; 232. Second clamping portion; 240. Rotating shaft; 241. First through hole; 242. First clamping portion;

[0046] 300. Support member; 400. Mounting plate;

[0047] 500. Driving device; 510. Rotor assembly; 511. Fixed housing; 512. Slide block; 513. Elastic member; 514. Slide groove; 515. First end plate; 516. Second end plate; 520. Driving motor. Detailed implementation manners

[0048] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0050] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0051] In the description of the present invention, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more.

[0052] The indoor unit 1 of the air conditioner according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0053] like Figures 1 - 19 As shown, the air conditioner indoor unit 1 according to an embodiment of the present invention includes a shell 100, a heat exchanger (not shown in the figure), an indoor fan (not shown in the figure), a heater (not shown in the figure), a flexible air guide plate 200, a driving device 500, a fresh air fan (not shown in the figure) and a controller (not shown in the figure).

[0054] The housing 100 has an indoor air inlet, an indoor air outlet 110, a fresh air inlet, and a fresh air outlet 120. The heat exchanger is installed in the housing 100. The indoor fan is installed in the housing 100 and is used to guide the indoor air into the housing 100 from the indoor air inlet, and to exchange heat with the heat exchanger to form hot air, and then to be discharged from the indoor air outlet 110. The heater is installed in the housing 100 and is used to heat the hot air. The flexible air guide plate 200 is rotatably installed in the housing 100 and is located at the indoor air outlet 110. The flexible air guide plate 200 can be spirally deformed into a spiral structure to control the flow direction of the hot air. The driving device 5 00 is installed in the shell 100 and is transmission-connected to one end of the flexible air guide plate 200 to drive one end of the flexible air guide plate 200 to rotate relative to the other end so that the flexible air guide plate 200 is spirally deformed. The fresh air fan is installed in the shell 100 and is used to guide the outdoor fresh air from the fresh air inlet to the fresh air outlet 120. The sensor unit is installed in the shell 100 and is used to detect the heat exchange air temperature, heat exchange air speed, fresh air temperature, fresh air speed and indoor temperature. The controller is installed in the shell 100 and is respectively connected to the fresh air fan, indoor fan, flexible air guide plate 200, drive device 500, heater and sensor unit.

[0055] The controller is configured to calculate the degree of influence of the outdoor fresh air on the indoor temperature based on the heating air temperature, heating air speed, fresh air temperature, fresh air speed and indoor temperature when the air conditioner is in heating mode and obtains the fresh air function start signal, and adjust the speed of the fresh air fan, the speed of the indoor fan, the switch of the heater and the angle of the spiral deformation of the flexible air guide plate 200 according to the degree of influence.

[0056] It should be noted that the air conditioner indoor unit 1 in the embodiment of the present invention may be a wall-mounted air conditioner indoor unit or a floor-standing air conditioner indoor unit.

[0057] The sensing unit may include multiple sensors, for example, one sensor for detecting the heat exchange air temperature, one sensor for detecting the heat exchange air speed, one sensor for detecting the fresh air temperature, one sensor for detecting the fresh air speed, and one sensor for detecting the indoor temperature. Alternatively, the sensing unit may be a device integrating multiple sensors, so that the sensing unit can integrate the functions of detecting the heat exchange air temperature, the heat exchange air speed, the fresh air temperature, the fresh air speed, and the indoor temperature.

[0058] According to an embodiment of the present invention, the air conditioner indoor unit 1 is provided with an indoor air inlet, an indoor air outlet 110, a fresh air inlet, and a fresh air outlet 120 in the housing 100, a heat exchanger is installed in the housing 100, and an indoor fan is installed in the housing 100, so as to guide indoor air into the housing 100 from the indoor air inlet, exchange heat with the heat exchanger to form heated air, and then be discharged from the indoor air outlet 110. In other words, the air conditioner indoor unit 1 can operate the indoor fan to guide indoor air into the housing 100 from the indoor air inlet, exchange heat with the heat exchanger to form heated air, and then be discharged into the room from the indoor air outlet 110, thereby cooling or heating the room.

[0059] Furthermore, a fresh air blower is installed within the housing 100 and is used to guide outdoor fresh air from the fresh air inlet to the fresh air outlet 120. Thus, through the operation of the fresh air blower, the outdoor fresh air can be guided from the fresh air inlet into the housing 100 and then discharged into the room through the fresh air outlet 120, thereby utilizing the outdoor fresh air to purify the indoor air. As a result, the flow paths of the indoor air and the outdoor fresh air can be different, and the indoor air and the outdoor fresh air can be mixed outside the housing 100, while the indoor air and the outdoor fresh air can not be mixed within the housing 100, thereby preventing the indoor air and the outdoor fresh air from mixing and generating condensation within the housing 100.

[0060] In addition, a heater is installed in the shell 100 for heating the hot exchange air. In this way, the temperature of the hot exchange air can be further increased by turning on the heater to heat the hot exchange air, thereby improving the heating capacity of the air conditioner indoor unit 1 in the heating mode, and the hot exchange air with higher temperature can be used to heat the outdoor fresh air to effectively increase the temperature of the outdoor fresh air and prevent the outdoor fresh air from blowing onto the user and causing the user to feel cold.

[0061] In addition, the flexible air guide plate 200 can be rotatably installed on the shell 100 and is located at the indoor air outlet 110, and the flexible air guide plate 200 can be spirally deformed to control the flow direction of the heat exchange air. The driving device 500 is transmission-connected to one end of the flexible air guide plate 200 to drive one end of the flexible air guide plate 200 to rotate relative to the other end so that the flexible air guide plate 200 is spirally deformed. The spiral deformation of the flexible air guide plate 200 means that one end of the flexible air guide plate 200 rotates relative to the other end along its central axis so that the flexible air guide plate 200 is spiral.

[0062] Specifically, the other end of the flexible air deflector 200 can be fixed, and the driving device 500 can drive one end of the flexible air deflector 200 to rotate, or both one end and the other end of the flexible air deflector 200 can rotate, but the rotation speed of one end of the flexible air deflector 200 is greater than that of the other end, so that one end of the flexible air deflector 200 can rotate relative to the other end to form a spiral structure. The flexible air deflector 200 can guide the flow direction of the heat exchange air to the fresh air outlet 120 through spiral deformation. In this way, the outdoor fresh air discharged from the fresh air outlet 120 and the heat exchange air discharged from the indoor air outlet 110 can be mixed outside the housing 100 of the indoor unit 1 of the air conditioner, thereby avoiding condensation inside the housing 100. Moreover, the outdoor fresh air and the heat exchange air can be mixed as soon as possible after being discharged from the housing 100, which is beneficial to improving the mixing effect of the outdoor fresh air and the heat exchange air, so as to more effectively heat the outdoor fresh air by the heat exchange air, complete the mixing of the outdoor fresh air and the heat exchange air before they contact the user's body, more effectively increase the temperature of the outdoor fresh air, and make the air supply comfort of the indoor unit 1 of the air conditioner better.

[0063] In addition, the sensing unit is installed on the housing 100 and is used to detect the heat exchange air temperature, heat exchange air speed, fresh air temperature, fresh air speed, and indoor temperature. The controller is installed inside the housing 100 and is respectively connected to the fresh air fan, indoor fan, flexible air deflector 200, heater, and sensing unit. The controller is configured to, when the air conditioner is in the heating mode and a fresh air function start signal is obtained, calculate the influence degree level of the outdoor fresh air on the indoor temperature according to the heat exchange air temperature, heat exchange air speed, fresh air temperature, fresh air speed, and indoor temperature, and adjust the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the switch of the heater, and the spiral deformation angle of the flexible air deflector 200 according to the influence degree level.

[0064] It can be understood that when the air conditioner is in the heating mode, the lower the fresh air temperature and the greater the fresh air speed, the greater the amount of cold introduced from the outside into the room per unit time, and the greater the influence of the outdoor fresh air on the indoor temperature. When the heat exchange air temperature is lower and the heat exchange air speed is lower, the less heat the heat exchange air uses to heat the outdoor fresh air per unit time, and at this time, the influence of the outdoor fresh air on the indoor temperature is also greater. It should be noted that if the influence degree level of the outdoor fresh air on the indoor temperature is higher, it means that the introduced outdoor fresh air will cause a greater fluctuation effect on the indoor temperature.

[0065] That is to say, when introducing outdoor fresh air in the heating mode, the controller can calculate the airflow information of the heat exchange air, such as the total heat of the heat exchange air, according to the heat exchange air temperature and the heat exchange air velocity, and calculate the airflow information of the outdoor fresh air, such as the total cold capacity of the outdoor fresh air, according to the fresh air temperature and the fresh air velocity. Thus, by combining the airflow information of the heat exchange air, the airflow information of the outdoor fresh air, and the indoor temperature, the influence degree level of the outdoor fresh air on the indoor temperature can be calculated, and the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the on / off of the heater, and the spiral deformation angle of the flexible air deflector 200 can be adjusted according to the size of the influence degree level.

[0066] Therefore, after determining the influence degree level, the rotation speed of the fresh air fan can be reduced to decrease the amount of outdoor fresh air introduced into the room, so as to reduce the cold capacity of the fresh air introduced into the room, and the rotation speed of the indoor fan can be increased to increase the amount of heat exchange air, so as to increase the heat used to heat the outdoor fresh air. Moreover, the temperature of the heat exchange air can be heated by the heater to increase the heat used to heat the outdoor fresh air. In addition, by adjusting the spiral deformation angle of the flexible air deflector 200, the heat exchange air can be blown more towards the fresh air outlet 120, so that more heat exchange air can be mixed with the outdoor fresh air, so as to quickly and effectively increase the temperature of the outdoor fresh air, make the influence of the outdoor fresh air on the indoor temperature smaller, and avoid the direct blowing of the relatively cold outdoor air on the user, which is beneficial to improving the air supply comfort of the indoor unit 1 of the air conditioner and providing a better user experience.

[0067] In this way, the indoor unit 1 of the air conditioner according to the embodiment of the present invention can avoid the direct blowing of fresh air cold wind on the user and avoid the generation of condensation, and has the advantage of comfortable air supply.

[0068] In some specific embodiments of the present invention, as Figure 12 shown, the indoor unit 1 of the air conditioner further includes a support member 300 and a mounting plate 400.

[0069] The support member 300 is passed through the flexible air deflector 200 and the support member 300 is rotatably installed at the indoor air outlet 110. The support member 300 can rotate with the torsion of the flexible air deflector 200. The mounting plate 400 is arranged inside the housing 100, and the support member 300 is rotatably arranged on the mounting plate 400. Wherein, the mounting plate 400 is provided with a circular opening, the support member 300 is a circular disc, and the circular disc is installed in the circular opening and is rotationally matched with the circular opening.

[0070] Specifically, the mounting plate 400 can be fixedly connected to the shell 100 and arranged at the indoor air outlet 110. By rotatably mounting the support member 300 on the mounting plate 400, when the flexible air guide plate 200 undergoes spiral deformation, the support member 300 can follow the spiral deformation of the flexible air guide plate 200 and rotate relative to the mounting plate 400, thereby ensuring that the flexible air guide plate 200 will not be concavely deformed due to the influence of gravity when it is in the horizontal air guiding, up and down air guiding and spiral kneading state, thereby avoiding the occurrence of the flexible air guide plate 200 getting stuck or producing friction noise, thereby effectively improving the reliability of the operation of the air guide device.

[0071] In addition, an inclined guide surface can be provided at at least one end of the inner side surface of the circular mouth along the axial direction, and a groove can be provided in the middle part of the inner side surface of the circular mouth along the axial direction. In this way, it is convenient to install the support member 300 into the circular mouth along the guide surface, and make the raised outer peripheral surface of the circular disk stuck in the groove of the circular mouth, which can ensure that the circular disk will not separate from the mounting plate 400 during rotation, which is conducive to improving the installation convenience and reliability of the support member 300.

[0072] In some specific embodiments of the present invention, Figures 13 - 17 As shown, the flexible wind guide plate 200 includes a plurality of flexible connectors 210 and a plurality of wind guide blades 220 .

[0073] Multiple flexible connectors 210 are arranged linearly, the support member 300 is set in the middle of the multiple flexible connectors 210 and the multiple flexible connectors 210 pass through the support member 300, and the multiple air guide blades 220 can be movably connected in series on the multiple flexible connectors 210, and the multiple flexible connectors 210 can drive the multiple air guide blades 220 to twist.

[0074] For example, the flexible connector 210 may be a flexible steel wire, and there may be three flexible connectors 210, which are arranged linearly. The support member 300 is provided with three perforations, which correspond one to one with the three flexible connectors 210. The support member 300 is penetrated through the middle of the flexible connector 210 through the perforations. In this way, when the flexible connector 210 is twisted, the middle flexible connector 210 can twist along its own central axis, while the two outer flexible connectors 210 twist along the central axis of the middle flexible connector 210. At this time, the shape of the middle flexible connector 210 remains unchanged, while the two outer flexible connectors 210 spiral, thereby driving the multiple air guide blades 220 to rotate and twist. At the same time, the support member 300 also rotates with the twisting of the flexible connector 210, so that the flexible air guide plate 200 as a whole is spirally deformed to form a spiral structure.

[0075] In some specific embodiments of the present invention, Figures 14 - 16As shown, the air guiding vane 220 includes a vane body 230 and a rotating shaft 240.

[0076] On opposite sides of the rotating shaft 240 in its radial direction, rotatable vane bodies 230 are respectively provided. A first through hole 241 is provided in the rotating shaft 240 in the axial direction. The vane body 230 is provided with a second through hole 231 along the axial direction of the rotating shaft 240. A plurality of flexible connectors 210 pass through the second through hole 231 and the first through hole 241 in a one-to-one correspondence, so that a plurality of air guiding vanes 220 can be connected in series.

[0077] Among them, the flexible connector 210 for connecting the rotating shafts 240 in series can be a high-strength steel wire, and only a plurality of rotating shafts 240 need to be connected in series. The flexible connector 210 for connecting the vane bodies 230 in series can be a flexible steel wire, which can deform when the vane body 230 twists. Moreover, due to the characteristics of the flexible steel wire such as tight structure, high strength and good wear resistance, it can ensure that the flexible steel wire twists repeatedly and is not easy to break.

[0078] In addition, the second through hole 231 in the vane body 230 can be in a gradually expanding shape in the axial direction from the middle to both ends, which is convenient for the flexible connector 210 to pass through a plurality of vane bodies 230, and is beneficial to simplifying the assembly steps to improve the installation efficiency.

[0079] In addition, first clamping portions 242 are provided at both ends of the rotating shaft 240 in the radial direction. A second clamping portion 232 is provided at one end of the vane body 230 facing the rotating shaft 240. For example, the first clamping portion 242 is a clamping claw, and the second clamping portion 232 is a clamping hole. The clamping claw and the clamping hole are in clamping fit. Moreover, a connecting shaft is provided on the clamping claw, and a notch is provided on the clamping hole. When the vane body 230 is installed on the rotating shaft 240, the clamping claw first contracts, expands at the notch after insertion, so that the clamping claw is clamped at the notch, so that the vane body 230 is not easy to fall off during movement. And, through the rotational fit between the connecting shaft and the clamping hole, the vane body 230 can rotate.

[0080] In some specific embodiments of the present invention, as Figures 13 - 19 shown, the driving device 500 includes a rotor assembly 510 and a driving motor 520.

[0081] The rotor assembly 510 includes a fixed shell 511, a slider 512 and an elastic member 513. A chute 514 with a notch facing the side of the flexible connector 210 is provided in the fixed shell 511. The slider 512 is movably arranged in the chute 514 and is fixedly connected to the flexible connector 210. The elastic member 513 is arranged in the chute 514 and sleeved on the flexible connector 210. Both ends of the elastic member 513 respectively abut against the slider 512 and one end of the chute 514 facing the flexible connector 210. The driving motor 520 is in transmission connection with the rotor assembly 510.

[0082] Specifically, the notch of the chute 514 faces the flexible connecting member 210. A slider 512 and an elastic member 513 are arranged in the chute 514. The slider 512 is fixedly connected to the flexible connecting member 210. Two ends of the elastic member 513 respectively abut between the slider 512 and one end of the chute 514 adjacent to the flexible connecting member 210. When the air guiding vane 220 twists, since the length of the flexible connecting member 210 will change in the twisted state, the slider 512 that fixes the two ends of the flexible connecting member 210 will compress the elastic member 513 at this time to compensate for the length of the flexible connecting member 210. In addition, the motor shaft of the driving motor 520 can be connected to the fixed housing 511 through a nut to achieve the power transmission of the driving motor 520.

[0083] In addition, the fixed housing 511 includes a first end plate 515 and a second end plate 516. The first end plate 515 and the second end plate 516 are detachably connected. Among them, the first end plate 515 and the second end plate 516 can be connected by snap connection. A chute 514 is formed inside the first end plate 515 and is used to connect with the flexible connecting member 210. The second end plate 516 is arranged at one end of the first end plate 515 away from the flexible connecting member 210 and is in transmission connection with the driving motor 520. In this way, the fixed housing 511 is a detachable structure, which is convenient for installing the slider 512 and the elastic member 513 into the chute 514 of the fixed housing 511, is beneficial to simplifying the structure of the rotor assembly 510, and is more convenient for disassembly and assembly.

[0084] In some specific embodiments of the present invention, as Figure 12 shown, the flexible air guiding plate 200 extends in the horizontal direction. The fresh air outlet 120 and the indoor air outlet 110 are arranged on the front side of the housing 100 and are spaced apart in the horizontal direction. The driving device 500 is installed on the housing 100 and is in transmission connection with one end of the flexible air guiding plate 200 close to the fresh air outlet 120. The driving device 500 rotates one end of the flexible air guiding plate 200 close to the fresh air outlet 120 to make the flexible air guiding plate 200 undergo spiral deformation.

[0085] For example, the indoor unit 1 of the air conditioner in the embodiment of the present invention can be a wall-mounted air conditioner indoor unit. The indoor air outlet can extend in the horizontal direction. The flexible air guiding plate 200 can be a transverse air guiding plate. The fresh air outlet 120 and the indoor air outlet can be spaced apart in the horizontal direction. The driving device 500 can be connected to one end of the flexible air guiding plate 200 close to the fresh air outlet 120, and drives the flexible air guiding plate 200 to undergo spiral deformation through the driving motor 520. The flexible air guiding plate 200 can guide the heat exchange air at the indoor air outlet 110 to the side close to the fresh air outlet 120, so that the heat exchange air can be mixed with the outdoor fresh air to increase the temperature of the outdoor fresh air.

[0086] It should be noted that the driving device 500 can be provided only at one end of the flexible air deflector 200 close to the fresh air outlet 120, or the driving device 500 can be provided at both ends of the flexible air deflector 200. By the synchronous operation of the driving devices 500 at both ends, the whole flexible air deflector 200 can be swung in the up and down direction. In the embodiment of the present invention, the driving device 500 on the side of the flexible air deflector 200 away from the fresh air outlet 120 can be turned off, and only the driving device 500 on the side of the flexible air deflector 200 close to the fresh air outlet 120 is operated to drive the flexible air deflector 200 to be spirally deformed, so as to realize blowing the heat exchange air towards the direction of the fresh air outlet 120.

[0087] In addition, the flexible air deflector 200 has a limit spiral angle. When the spiral deformation angle of the flexible air deflector 200 is not greater than the limit spiral angle, the air volume of the heat exchange air flowing towards the fresh air outlet 120 is proportional to the spiral deformation angle of the flexible air deflector 200.

[0088] Among them, the limit spiral angle refers to the spiral angle at which the flexible air deflector 200 has the highest air guiding efficiency for guiding the heat exchange air towards the side close to the fresh air outlet 120. When the spiral angle of the flexible air deflector 200 is not greater than the limit spiral angle, the larger the spiral deformation angle of the flexible air deflector 200, the larger the air volume of the heat exchange air flowing towards the fresh air outlet 120. In addition, it should be noted that the spiral deformation angle of the flexible air deflector 200 can also be greater than the limit spiral angle. When the spiral deformation angle of the flexible air deflector 200 is greater than the limit spiral angle, the flexible air deflector 200 will block the heat exchange air flowing towards the fresh air outlet 120, which is not conducive to guiding the heat exchange air towards the fresh air outlet 120. However, when the spiral deformation angle of the flexible air deflector 200 is greater than the limit spiral angle, the flexible air deflector 200 can guide the heat exchange air to other positions in the room. When not considering the efficiency of mixing the heat exchange air and the outdoor fresh air, the air supply uniformity of the heat exchange air can be improved, and the heat exchange air can be guided to multiple positions in the room.

[0089] In some specific embodiments of the present invention, as Figure 1 shown, the influence degree level of the outdoor fresh air on the indoor temperature is calculated according to the heat exchange air temperature, heat exchange air velocity, fresh air temperature, fresh air velocity and indoor temperature, including: the heat exchange air temperature is T1, the heat exchange air velocity is V1, the fresh air temperature is T2, the fresh air velocity is V2, and the indoor temperature is T3;

[0090] A = %;

[0091] When A is not greater than 10%, the influence degree level is the first level;

[0092] When A is greater than 10% and not greater than 30%, the influence degree level is the second level;

[0093] When A is greater than 30% and not greater than 50%, the influence degree level is level three;

[0094] When A is greater than 50%, the influence degree level is level four. Among them, the greater the influence degree level, the greater the influence of outdoor fresh air on indoor temperature.

[0095] Therefore, by combining the heat exchange air temperature, heat exchange air velocity, fresh air temperature, fresh air velocity, and indoor temperature, the influence degree level of outdoor fresh air on indoor temperature can be judged more accurately. When the air conditioner is in the heating mode, the lower the fresh air temperature and the greater the fresh air velocity, the greater the amount of cold air introduced from the outside into the room per unit time, and the higher the influence degree level of outdoor fresh air on indoor temperature. When the heat exchange air temperature is lower and the heat exchange air velocity is lower, the less heat the heat exchange air uses to heat the outdoor fresh air per unit time, and at this time, the influence degree level of outdoor fresh air on indoor temperature is also higher.

[0096] In some specific embodiments of the present invention, as Figure 1 、 Figures 2 - 6 shown, according to the influence degree level, adjust the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the power of the heater, and the spiral deformation angle of the flexible air deflector 200, including:

[0097] If the influence degree level is level one, the heater is turned off, the fresh air fan operates at the first fresh air rotation speed, the indoor fan operates at the first rotation speed, and the flexible air deflector 200 spirally deforms by the first angle;

[0098] If the influence degree level is level two, the heater is turned off, the fresh air fan operates at the second fresh air rotation speed, the indoor fan operates at the second rotation speed, and the flexible air deflector 200 spirally deforms by the second angle;

[0099] If the influence degree level is level three, the heater is turned on, the fresh air fan operates at the third fresh air rotation speed, the indoor fan operates at the third rotation speed, and the flexible air deflector 200 spirally deforms by the second angle;

[0100] If the influence degree level is level four, the heater is turned on, the fresh air fan operates at the fourth fresh air rotation speed, the indoor fan operates at the fourth rotation speed, and the flexible air deflector 200 spirally deforms by the third angle.

[0101] Among them, the first rotation speed, the second rotation speed, the third rotation speed, and the fourth rotation speed increase in sequence, the first fresh air rotation speed, the second fresh air rotation speed, the third fresh air rotation speed, and the fourth fresh air rotation speed decrease in sequence, and the first angle, the second angle, and the third angle increase in sequence and are not greater than the limit spiral angle.

[0102] For example, the first fresh air rotation speed can be the rated rotation speed of the fresh air fan, the second fresh air rotation speed can be 60% of the rated rotation speed of the fresh air fan, and the third fresh air rotation speed can be 30% of the rated rotation speed of the fresh air fan.

[0103] The first rotational speed can be a relatively low default rotational speed. The second rotational speed can increase the rated rotational speed of the indoor fan by 10% based on the first rotational speed. The third rotational speed can increase the rated rotational speed of the indoor fan by 20% based on the second rotational speed. The fourth rotational speed can be the rated rotational speed of the indoor fan. For example, if the first rotational speed is 60% of the rated rotational speed of the indoor fan, then the second rotational speed can be 70% of the rated rotational speed of the indoor fan, and the third rotational speed can be 90% of the rated rotational speed of the indoor fan.

[0104] In addition, the first angle can be that the flexible air deflector 200 spirally rotates by 20°. The second angle can be that the flexible air deflector 200 spirally rotates by 40°. The third angle can be that the flexible air deflector 200 spirally rotates by 60°.

[0105] That is to say, when the influence degree level is the lowest first level, at this time, the influence of outdoor fresh air on the indoor temperature is relatively small. Furthermore, the heater can be not turned on to heat the heat exchange air. After the indoor air exchanges heat with the heat exchanger, it can meet the heating requirement for the outdoor fresh air. Moreover, the rotational speed of the fresh air fan can be the highest first fresh air rotational speed to introduce more outdoor fresh air and improve the purification effect of the outdoor fresh air on the indoor air. In addition, the indoor fan can operate at the lowest first rotational speed and the flexible air deflector 200 can be spirally deformed by the first angle. The air volume of the heat exchange air can be relatively small and the air volume of the heat exchange air flowing towards the fresh air outlet 120 can also be relatively small. A relatively small amount of heat exchange air can meet the heating requirement for the outdoor fresh air, raising the temperature of the outdoor fresh air to be close to the indoor temperature to further reduce the influence of the outdoor fresh air on the indoor temperature.

[0106] When the influence degree level is the second level, at this time, the influence of outdoor fresh air on the indoor temperature is relatively large but not serious. At this time, the heater can also be not turned on to heat the heat exchange air. After the indoor air exchanges heat with the heat exchanger, it can meet the heating requirement for the outdoor fresh air. Moreover, the rotational speed of the fresh air fan can be reduced to the second highest second fresh air rotational speed to reduce the air volume of the introduced outdoor fresh air but the fresh air volume will not be too low, which can not only ensure the purification effect of the outdoor fresh air on the indoor air but also reduce the influence degree of the outdoor fresh air on the indoor temperature. In addition, the indoor fan can be increased to the second rotational speed and the spiral deformation of the flexible air deflector 200 can be increased to the second angle, so that the air volume of the heat exchange air can be increased and the air volume of the heat exchange air flowing towards the fresh air outlet 120 can also be increased. Furthermore, more heat exchange air can be mixed with the outdoor fresh air to more effectively increase the temperature of the outdoor fresh air, raising the temperature of the outdoor fresh air to be close to the indoor temperature to further reduce the influence of the outdoor fresh air on the indoor temperature.

[0107] When the influence degree level is level three, the influence of outdoor fresh air on the indoor temperature is greater at this time. At this time, the heater can be turned on to heat the heat exchange air to increase the temperature of the heat exchange air to meet the heating requirement for the outdoor fresh air. Moreover, the rotational speed of the fresh air fan can be reduced to a lower third fresh air rotational speed to further reduce the introduced outdoor fresh air volume and thus reduce the influence degree of the outdoor fresh air on the indoor temperature. In addition, the indoor fan can be raised to a higher third rotational speed and the spiral deformation of the flexible air deflector 200 can be increased to a second angle, so that the air volume of the heat exchange air can be further increased and the air volume of the heat exchange air flowing towards the fresh air outlet 120 is also relatively large. Furthermore, more heat exchange air can be mixed with the outdoor fresh air to more effectively increase the temperature of the outdoor fresh air, raising the outdoor fresh air temperature to be close to the indoor temperature to further reduce the influence of the outdoor fresh air on the indoor temperature.

[0108] When the influence degree level is level four, the influence of outdoor fresh air on the indoor temperature is the greatest at this time. At this time, the heater can be turned on to heat the heat exchange air to increase the temperature of the heat exchange air to meet the heating requirement for the outdoor fresh air. Moreover, the rotational speed of the fresh air fan can be reduced to the lowest fourth fresh air rotational speed to further reduce the introduced outdoor fresh air volume and thus minimize the influence degree of the outdoor fresh air on the indoor temperature. In addition, the indoor fan can be raised to the highest fourth rotational speed and the spiral deformation of the flexible air deflector 200 can be increased to a third angle, so that the air volume of the heat exchange air can be further increased and the air volume of the heat exchange air flowing towards the fresh air outlet 120 is even larger. Furthermore, more heat exchange air can be mixed with the outdoor fresh air to more effectively increase the temperature of the outdoor fresh air, raising the outdoor fresh air temperature to be close to the indoor temperature to further reduce the influence of the outdoor fresh air on the indoor temperature.

[0109] Thus, when the influence degree levels are different, the rotational speed of the fresh air fan, the rotational speed of the indoor fan, the power of the heater, and the angle of the spiral deformation of the flexible air deflector 200 can be adjusted according to the influence degree level, so that the rotational speed of the fresh air fan, the rotational speed of the indoor fan, the power of the heater, and the angle of the spiral deformation of the flexible air deflector 200 can match the influence degree level, which can not only meet the requirement of purifying indoor air using outdoor fresh air but also avoid the excessive influence of outdoor fresh air on the indoor temperature to improve the air outlet comfort of the indoor unit 1 of the air conditioner.

[0110] Furthermore, as Figure 7 and Figure 8 shown, if the influence degree level is level three, the heater operates at a first power;

[0111] if the influence degree level is level four, the heater operates at a second power. Among them, the first power is less than the second power.

[0112] That is to say, when the influence degree level is three, the heater can operate at a lower first power at this time. While increasing the temperature of the heat exchange air, it can also avoid excessive energy consumption of the heater, effectively utilize the heat exchange air heated by the heater to heat the outdoor fresh air, so as to increase the temperature of the outdoor fresh air, and can avoid the temperature of the heat exchange air from being too high, so as to ensure that the air blown out by the indoor unit 1 of the air conditioner is more comfortable, and the energy consumption of the indoor unit 1 of the air conditioner will not be too high.

[0113] When the influence degree level is four, the influence of the outdoor fresh air on the indoor temperature is the greatest. At this time, the heater can be turned on to a higher second power to further increase the temperature of the heat exchange air. The higher the temperature of the heat exchange air, the more effectively it can be used to heat the outdoor fresh air, thereby more effectively increasing the temperature of the outdoor fresh air, making the temperature of the outdoor fresh air increase to be close to the indoor temperature, so as to further reduce the influence of the outdoor fresh air on the indoor temperature.

[0114] In some specific embodiments of the present invention, the second power is the rated power of the heater, the fourth speed is the rated speed of the indoor fan, the first fresh air speed is the rated speed of the fresh air fan, and the third angle is equal to the limit spiral angle.

[0115] Therefore, when the influence degree level is four, the influence of the outdoor fresh air on the indoor temperature is the greatest. The heater can operate at the maximum second power, the indoor fan can rotate at the fastest fourth speed, and the flexible air deflector 200 can be spirally deformed to the third angle with the highest air guiding efficiency, that is, the limit spiral angle. In this way, the heating effect of the heater on the heat exchange air is the best, the air guiding efficiency of the indoor fan on the heat exchange air is also the highest, and the air volume of the flexible air deflector 200 guiding the heat exchange air towards the fresh air outlet 120 direction is the largest, more effectively utilizing the heat exchange air to heat the outdoor fresh air, so as to reduce the influence of the outdoor fresh air on the indoor temperature and make the air blown out by the indoor unit 1 of the air conditioner more comfortable.

[0116] Moreover, when the influence degree is one, the influence of the outdoor fresh air on the indoor temperature is small. At this time, even if more outdoor fresh air is introduced, the outdoor fresh air will not bring too much cold air into the room. Furthermore, the fresh air fan can rotate at the fastest first fresh air speed to introduce more outdoor fresh air, so as to improve the effect of purifying the indoor air with the outdoor fresh air and quickly improve the indoor air quality.

[0117] In some specific embodiments of the present invention, as Figure 1 shown, the indoor unit 1 of the air conditioner further includes a CO2 detection unit.

[0118] The CO2 detection unit is installed on the housing 100 and is used to detect the indoor CO2 concentration. Wherein, the controller is configured to, after obtaining the fresh air function start signal, start the fresh air function until the indoor CO2 concentration is not greater than the preset CO2 concentration, and then turn off the fresh air function.

[0119] In this way, when the indoor air quality is poor, the indoor unit 1 of the air conditioner can turn on the fresh air function to introduce outdoor fresh air to purify the indoor air. And when the indoor CO2 concentration is not greater than the preset CO2 concentration, that is, when the indoor CO2 concentration is low, the fresh air function can be turned off. At this time, the indoor air quality is high and no fresh air is introduced, which can avoid the influence of outdoor fresh air on the indoor temperature, thus avoiding the low outlet air temperature and making the user feel cold, and is also beneficial to improving the comfort of the outlet air of the indoor unit 1 of the air conditioner.

[0120] In some specific embodiments of the present invention, as Figure 1 shown, the controller is configured to:

[0121] If the influence degree level is the first level, the indoor CO2 concentration is detected after the fresh air function is turned on for the first preset time;

[0122] If the influence degree level is the second level, the indoor CO2 concentration is detected after the fresh air function is turned on for the second preset time;

[0123] If the influence degree level is the third level, the indoor CO2 concentration is detected after the fresh air function is turned on for the third preset time;

[0124] If the influence degree level is the fourth level, the indoor CO2 concentration is detected after the fresh air function is turned on for the fourth preset time. Among them, the first preset time, the second preset time, the third preset time, and the fourth preset time are shortened in turn.

[0125] For example, the first preset time can be 3h, the second preset time can be 2h, the third preset time can be 1.5h, and the fourth preset time can be 1h.

[0126] That is to say, when the influence degree of outdoor fresh air on the indoor temperature is greater, the shorter the time the fresh air function is turned on, the indoor CO2 concentration can be detected. In this way, if it is detected that the indoor CO2 concentration is not greater than the preset CO2 concentration after reaching the preset time, the fresh air function can be turned off, so that the time for turning on the fresh air function can be shortened. When the influence degree of outdoor fresh air on the indoor temperature is greater, the time for turning on the fresh air function is shorter, thus reducing the influence of outdoor fresh air on the indoor temperature and making the outlet air of the indoor unit 1 of the air conditioner more comfortable. If it is detected that the indoor CO2 concentration is still greater than the preset CO2 concentration after reaching the preset time, the fresh air function continues to be turned on, and the rotational speed of the fresh air fan, the rotational speed of the indoor fan, the state of the heater, and the spiral deformation angle of the flexible air deflector 200 remain unchanged until the indoor CO2 concentration is not greater than the preset CO2 concentration, then the fresh air function can be turned off.

[0127] Of course, in the embodiments of the present invention, the detection of the indoor CO2 concentration can also be set for real-time monitoring. That is to say, when the fresh air function of the indoor unit 1 of the air conditioner is turned on, the indoor unit 1 of the air conditioner can detect the indoor CO2 concentration in real time. In this way, the monitoring of the indoor CO2 concentration by the indoor unit 1 of the air conditioner is more sensitive. When the indoor CO2 concentration drops to the preset CO2 concentration, the fresh air function can be immediately turned off, thereby preventing the continuous introduction of outdoor fresh air, avoiding the influence of outdoor fresh air on the indoor temperature, making the outlet air temperature of the indoor unit 1 of the air conditioner higher, avoiding the user from feeling cold, and providing a better user experience.

[0128] In some specific embodiments of the present invention, as Figure 9 shown, the controller is configured that if the influence degree level is four, the heater operates at the second power, the fresh air fan operates at the fourth fresh air speed, the indoor fan operates at the fourth speed, and after the flexible air deflector 200 is spirally deformed by the third angle and the difference between the outdoor fresh air temperature and the indoor temperature is not less than the preset temperature difference, the operating frequency of the compressor of the air conditioner is increased.

[0129] In this way, when the outdoor fresh air has a greater impact on the indoor temperature, the heater operates at the maximum second power, the fresh air fan operates at the lowest fourth fresh air speed, the indoor fan operates at the highest fourth speed, and after the flexible air deflector 200 is spirally deformed into the third angle with the highest air guiding efficiency, if the impact of the outdoor fresh air on the indoor temperature still cannot be reduced to a comfortable range for the user, the operating frequency of the compressor can be increased to enhance the heating effect of the air conditioner, making the heat of the heat exchange air greater. Thus, the outdoor fresh air can be mixed and heated with the hotter heat exchange air to make the difference between the outdoor fresh air temperature and the indoor temperature less than the preset temperature difference, further improving the comfort of the outlet air of the indoor unit 1 of the air conditioner.

[0130] In some specific embodiments of the present invention, as Figure 10 and Figure 11 shown, if the current operating frequency of the compressor of the air conditioner is not less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor is adjusted to the rated frequency of the compressor of the air conditioner;

[0131] if the current operating frequency of the compressor is less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor is increased by 20% of the rated frequency of the compressor of the air conditioner.

[0132] That is to say, when the current operating frequency of the compressor is less than 80% of the rated frequency of the compressor, the operating frequency of the compressor is increased by 20% of the rated frequency. For example, when the current operating frequency of the compressor is 60% of the rated frequency, the operating frequency of the compressor can be adjusted to 80% of the rated frequency. When the current operating frequency of the compressor is not less than 80% of the rated frequency, the operating frequency of the compressor can be directly adjusted to the rated frequency. When the current operating frequency of the compressor is the rated frequency, the frequency of the compressor does not need to be adjusted. In this way, the operating frequency of the compressor can be significantly increased, the heating effect of the air conditioner is better, and thus the temperature of the heat exchange air can be more effectively increased, so that the difference between the outdoor fresh air temperature and the indoor temperature is less than the preset temperature difference, and the air outlet of the indoor unit 1 of the air conditioner is more comfortable.

[0133] Other configurations and operations of the indoor unit 1 of the air conditioner according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0134] The indoor unit 1 of the air conditioner in the present application performs the refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0135] The compressor compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0136] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant to perform heat exchange with the material to be cooled. Throughout the cycle, the indoor unit 1 of the air conditioner can adjust the temperature and humidity of the indoor space.

[0137] In the description of this specification, the descriptions referring to the terms "specific embodiments", "specific examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0138] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An indoor unit of an air conditioner, characterized in that, Comprising: A housing having an indoor air inlet, an indoor air outlet, a fresh air inlet, and a fresh air outlet; A heat exchanger installed within the housing; An indoor fan installed within the housing for guiding indoor air to enter the housing from the indoor air inlet, exchanging heat with the heat exchanger to form heated air, and then discharging the heated air from the indoor air outlet; A heater installed within the housing for heating the heated air; A flexible air deflector rotatably installed at the indoor air outlet of the housing, and the flexible air deflector can be helically deformed to form a helical structure to control the flow direction of the heated air; A driving device installed on the housing and drivingly connected to one end of the flexible air deflector to drive one end of the flexible air deflector to rotate relative to the other end, so that the flexible air deflector is helically deformed; A fresh air fan installed within the housing for guiding outdoor fresh air to flow from the fresh air inlet to the fresh air outlet; A sensing unit installed on the housing for detecting the temperature of the heated air, the wind speed of the heated air, the temperature of the fresh air, the wind speed of the fresh air, and the indoor temperature; A controller installed within the housing and connected to the fresh air fan, the indoor fan, the flexible air deflector, the driving device, the heater, and the sensing unit respectively; The controller is configured to, when the air conditioner is in the heating mode and a fresh air function activation signal is obtained, calculate the influence degree level of the outdoor fresh air on the indoor temperature according to the temperature of the heated air, the wind speed of the heated air, the temperature of the fresh air, the wind speed of the fresh air, and the indoor temperature, and adjust the rotational speed of the fresh air fan, the rotational speed of the indoor fan, the switch of the heater, and the helical deformation angle of the flexible air deflector according to the influence degree level.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, Further comprising: A support member, the support member is inserted through the flexible air deflector and rotatably installed at the indoor air outlet, and the support member can rotate along with the torsion of the flexible air deflector; A mounting plate, the mounting plate is arranged within the housing, and the support member is rotatably arranged on the mounting plate; Wherein, the mounting plate is provided with a circular opening, the support member is a circular disk, and the circular disk is installed in the circular opening and is rotationally matched with the circular opening.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The flexible air deflector comprises: A plurality of flexible connectors, the plurality of flexible connectors are linearly arranged, the support member is arranged in the middle of the plurality of flexible connectors, and the plurality of flexible connectors penetrate through the support member; A plurality of air guiding vanes, the plurality of air guiding vanes are movably connected in series on the plurality of flexible connectors, and the plurality of flexible connectors can drive the plurality of air guiding vanes to twist.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The air guiding vane comprises: A vane body and a rotating shaft, the rotating shaft is respectively provided with the rotatable vane body on opposite sides in its radial direction, the rotating shaft is provided with a first through hole in its axial direction, the vane body is provided with a second through hole along the axial direction of the rotating shaft, and the plurality of flexible connectors respectively penetrate through the second through hole and the first through hole.

5. The indoor unit of the air conditioner according to claim 3, characterized in that, The driving device comprises: The rotor assembly, which includes a fixed housing, a slider, and an elastic member. A chute with a notch facing one side of the flexible connecting member is provided inside the fixed housing. The slider is movably arranged in the chute and fixedly connected to the flexible connecting member. The elastic member is arranged in the chute and sleeved on the flexible connecting member. Two ends of the elastic member respectively abut against the slider and one end of the chute facing the flexible connecting member; A driving motor, which is in transmission connection with the rotor assembly.

6. The indoor unit of an air conditioner according to claim 1, characterized in that, The flexible air deflector extends in the horizontal direction. The fresh air outlet and the indoor air outlet are arranged on the front side of the housing and spaced apart in the horizontal direction. The driving device is installed on the housing and in transmission connection with one end of the flexible air deflector close to the fresh air outlet. The driving device rotates one end of the flexible air deflector close to the fresh air outlet to make the flexible air deflector helically deformed; Wherein, the flexible air deflector has a limit spiral angle. When the spiral deformation angle of the flexible air deflector is not greater than the limit spiral angle, the air volume of the heat exchange air flowing in the direction of the fresh air outlet is proportional to the spiral deformation angle of the flexible air deflector.

7. The indoor unit of an air conditioner according to claim 6, characterized in that, Calculating the influence degree level of the outdoor fresh air on the indoor temperature according to the heat exchange air temperature, the heat exchange air velocity, the fresh air temperature, the fresh air velocity, and the indoor temperature, includes: The heat exchange air temperature is T1, the heat exchange air velocity is V1, the fresh air temperature is T2, the fresh air velocity is V2, and the indoor temperature is T3; A= %； When A is not greater than 10%, the influence degree level is the first level; When A is greater than 10% and not greater than 30%, the influence degree level is the second level; When A is greater than 30% and not greater than 50%, the influence degree level is the third level; When A is greater than 50%, the influence degree level is the fourth level; Wherein, the greater the influence degree level, the greater the influence of the outdoor fresh air on the indoor temperature.

8. The indoor unit of an air conditioner according to claim 7, characterized in that, Adjusting the rotation speed of the fresh air fan, the rotation speed of the indoor fan, the power of the heater, and the spiral deformation angle of the flexible air deflector according to the influence degree level, includes: If the influence degree level is the first level, the heater is turned off, the fresh air fan operates at the first fresh air rotation speed, the indoor fan operates at the first rotation speed, and the flexible air deflector is helically deformed by the first angle; If the influence degree level is the second level, the heater is turned off, the fresh air fan operates at the second fresh air rotation speed, the indoor fan operates at the second rotation speed, and the flexible air deflector is helically deformed by the second angle; If the influence degree level is the third level, the heater is turned on, the fresh air fan operates at the third fresh air rotation speed, the indoor fan operates at the third rotation speed, and the flexible air deflector is helically deformed by the second angle; If the influence degree level is the fourth level, the heater is turned on, the fresh air fan operates at the fourth fresh air rotation speed, the indoor fan operates at the fourth rotation speed, and the flexible air deflector is helically deformed by the third angle; Wherein, the first rotation speed, the second rotation speed, the third rotation speed, and the fourth rotation speed increase in sequence; The first fresh air rotation speed, the second fresh air rotation speed, the third fresh air rotation speed, and the fourth fresh air rotation speed decrease in sequence; The first angle, the second angle, and the third angle increase in sequence and are not greater than the limit spiral angle.

9. The indoor unit of an air conditioner according to claim 8, characterized in that, If the influence degree level is three, the heater operates at a first power; If the influence degree level is four, the heater operates at a second power; Wherein, the first power is less than the second power.

10. The indoor unit of an air conditioner according to claim 9, characterized in that, The second power is the rated power of the heater; The fourth rotation speed is the rated rotation speed of the indoor fan; The first fresh air rotation speed is the rated rotation speed of the fresh air fan; The third angle is equal to the limit spiral angle.

11. The indoor unit of the air conditioner according to claim 8, characterized in that, Further included: A CO2 detection unit, which is installed on the housing and is used to detect the indoor CO2 concentration; Wherein, the controller is configured such that after obtaining a fresh air function start signal, the fresh air function is started until the indoor CO2 concentration is not greater than a preset CO2 concentration, and then the fresh air function is turned off.

12. The indoor unit of an air conditioner according to claim 11, characterized in that, The controller is configured as: If the influence degree level is one, the indoor CO2 concentration is detected after the fresh air function is started for a first preset time; If the influence degree level is two, the indoor CO2 concentration is detected after the fresh air function is started for a second preset time; If the influence degree level is three, the indoor CO2 concentration is detected after the fresh air function is started for a third preset time; If the influence degree level is four, the indoor CO2 concentration is detected after the fresh air function is started for a fourth preset time; Wherein, the first preset time, the second preset time, the third preset time, and the fourth preset time decrease in sequence.

13. The indoor unit of an air conditioner according to claim 8, characterized in that, The controller is configured such that if the influence degree level is four, the heater operates at a second power, the fresh air fan operates at the fourth fresh air rotation speed, the indoor fan operates at the fourth rotation speed, and after the flexible air deflector spirally deforms by the third angle, if the difference between the outdoor fresh air temperature and the indoor temperature is not less than a preset temperature difference, the operating frequency of the compressor of the air conditioner is increased.

14. The indoor unit of an air conditioner according to claim 13, characterized in that, If the current operating frequency of the compressor of the air conditioner is not less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor of the air conditioner is adjusted to the rated frequency of the compressor of the air conditioner; If the current operating frequency of the compressor of the air conditioner is less than 80% of the rated frequency of the compressor of the air conditioner, the operating frequency of the compressor of the air conditioner is increased by 20% of the rated frequency of the compressor of the air conditioner.

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