Air conditioner and control method thereof

Abstract

The application provides an air conditioner and a control method thereof, wherein the air conditioner comprises: an air conditioner body having a shell, an indoor heat exchanger and a first fan being arranged in the shell; an air duct, one end of which is communicated with an air inlet side or an air outlet side of the indoor heat exchanger, and the other end of which is communicated with an outdoor environment; and a humidity adjusting assembly in the air duct, the humidity adjusting assembly being capable of being driven to switch between a first position and a second position, when the humidity adjusting assembly is in the first position, air flowing through the air duct passes through the humidity adjusting assembly to adjust the humidity of the air, and when the humidity adjusting assembly is in the second position, air flowing through the air duct does not pass through the humidity adjusting assembly. The air conditioner integrates the functions of fresh air introduction or indoor exhaust and humidity adjustment of indoor air flow through one air duct, is compact in structure, and occupies a small space when installed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioning, and particularly relates to an air conditioner and a control method thereof. BACKGROUND

[0002] With the improvement of living standards, people's demand for healthy indoor air is becoming stronger and stronger. Therefore, people often use fresh air systems to replace indoor air to improve indoor air quality. However, existing air conditioners (such as wall-mounted air conditioners) often only have the function of air temperature adjustment, which is single and cannot meet people's diverse needs. In order to meet people's needs, the prior art has appeared technical solutions of adding fresh air introduction devices or humidifying devices to air conditioners, but these solutions are often separately arranged based on different air ducts, resulting in a large overall structure of the air conditioner, which is not compact and occupies a large installation space. SUMMARY

[0003] Therefore, the present application provides an air conditioner and a control method thereof, which can solve the technical problem of the prior art that the separate arrangement of the fresh air introduction module and the humidifying module in the air conditioner results in a large overall structure of the air conditioner, which is not compact and occupies a large installation space.

[0004] In order to solve the above problems, the present application provides an air conditioner, comprising:

[0005] An air conditioner body having a shell, wherein an indoor heat exchanger and a first fan are arranged in the shell, and an indoor return air inlet on the air inlet side of the indoor heat exchanger and an indoor air outlet on the air outlet side of the indoor heat exchanger are formed on the shell;

[0006] A ventilation air duct, one end of which is in communication with the air inlet side or the air outlet side of the indoor heat exchanger, and the other end of which is in communication with the outdoor environment;

[0007] A humidity adjustment assembly in the ventilation air duct, the humidity adjustment assembly being capable of being driven to switch between a first position and a second position, when the humidity adjustment assembly is in the first position, the airflow flowing through the ventilation air duct passes through the humidity adjustment assembly to adjust the humidity of the airflow, and when the humidity adjustment assembly is in the second position, the airflow flowing through the ventilation air duct does not pass through the humidity adjustment assembly.

[0008] In some embodiments, the air conditioner further comprises:

[0009] A second fan in the ventilation air duct, the second fan having a first rotation direction capable of driving outdoor airflow to flow indoors and a second rotation direction capable of driving indoor airflow to flow outdoors.

[0010] In some embodiments,

[0011] The humidity adjusting assembly comprises a moisture absorption disc having a moisture absorption and air permeable film.

[0012] In some embodiments,

[0013] When the humidity adjusting assembly is in the first position and the second fan is running in a first rotation direction, the humidity adjusting assembly is in a humidifying state; when the humidity adjusting assembly is in the first position and the second fan is running in a second rotation direction, the humidity adjusting assembly is in a dehumidifying state.

[0014] In some embodiments,

[0015] The humidity adjusting assembly further comprises a rotary motor driving the moisture absorption disc to switch between the first position and the second position in a rotary manner.

[0016] In some embodiments,

[0017] The ventilation duct has a receiving groove on a channel side wall, and the moisture absorption disc is in the receiving groove when the humidity adjusting assembly is in the second position.

[0018] In some embodiments,

[0019] The ventilation duct is configured with a water inlet, and a water supply component is in controllable communication with the moisture absorption disc through the water inlet.

[0020] The application also provides a control method of the air conditioner as described above, comprising the following steps:

[0021] Obtaining a control instruction, the control instruction comprising one of running a fresh air mode, running a dehumidifying mode or running a humidifying mode;

[0022] Controlling the running state of the first fan and / or the second fan and the position switching of the humidity adjusting assembly according to the obtained control instruction.

[0023] In some embodiments, controlling the running state of the first fan and / or the second fan and the position switching of the humidity adjusting assembly according to the obtained control instruction specifically comprises:

[0024] When the control instruction is running the fresh air mode, controlling the second fan to run in a first rotation direction, and controlling the humidity adjusting assembly to be in the second position.

[0025] In some embodiments, controlling the running state of the first fan and / or the second fan and the position switching of the humidity adjusting assembly according to the obtained control instruction further specifically comprises:

[0026] When the control instruction is to run the humidification mode, the second fan is controlled to run in the first rotation direction, the humidity adjustment assembly is controlled to be in the first position, and the humidity adjustment assembly is controlled to be in the humidification state.

[0027] In some embodiments, the control of the running state of the first and / or second fan and the position switching of the humidity adjustment assembly according to the obtained control instruction further comprises:

[0028] When the control instruction is to run the dehumidification mode, the second fan is controlled to run in the second rotation direction, the humidity adjustment assembly is controlled to be in the first position, and the humidity adjustment assembly is controlled to be in the dehumidification state.

[0029] In some embodiments,

[0030] When the second fan is in the running state, the first fan is also controlled to run.

[0031] The air conditioner and the control method thereof provided by the present application have the following advantages. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a perspective view of an air conditioner according to an embodiment of the present application (rear side view);

[0033] Figure 2 FIG. 2 is an exploded view of the air conditioner of FIG. 1; Figure 1

[0034] Figure 3 FIG. 4 is a sectional view of the air conditioner of FIG. 1 (at the position of the ventilation duct); Figure 1

[0035] Figure 4 FIG. 5 is a schematic view of the state of the humidity adjustment assembly in the air conditioner of FIG. 1 when the humidity adjustment assembly is in the first position;

[0036] Figure 5 FIG. 6 is a schematic view of the state of the humidity adjustment assembly in the air conditioner of FIG. 1 when the humidity adjustment assembly is in the second position;

[0037] Figure 6 FIG. 7 is a schematic view of the control logic in the air conditioner control method of FIG. 1 when the fresh air mode is turned on.​​

[0038] Figure 7 Fig. 1 is a schematic diagram of the control logic of the air conditioner control method according to an embodiment of the present application.

[0039] The reference signs are as follows:

[0040] 11, housing; 111, indoor return air inlet; 112, indoor air supply outlet; 113, air deflector; 114, main frame; 115, front panel; 116, left side panel; 117, right side panel; 118, return air filter screen; 12, indoor heat exchanger; 13, first fan;

[0041] 2, ventilation air duct;

[0042] 21, accommodating recess; 22, water inlet;

[0043] 3, humidity adjustment assembly;

[0044] 31, moisture absorption disc; 32, rotary motor;

[0045] 4, second fan. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0047] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein.

[0048] For reference Figure 1 and Figure 7 According to an embodiment of the present application, an air conditioner is provided, which comprises:

[0049] The air conditioner body has a shell 11, the shell 11 is provided with an indoor heat exchanger 12 and a first fan 13, the shell 11 is provided with an indoor return air inlet 111 on the air inlet side of the indoor heat exchanger 12 and an indoor air outlet 112 on the air outlet side of the indoor heat exchanger 12, the indoor return air inlet 111 is provided with a return air filter screen 118, and the indoor air outlet 112 is provided with a guide vane 113 to adjust the air supply direction, and the shell 11 includes a main frame 114, the front side of the main frame 114 is provided with a front panel 115, and the left and right sides are respectively connected with a left side plate 116 and a right side plate 117;

[0050] The ventilation air duct 2 is communicated with the air inlet side or the air outlet side of the indoor heat exchanger 12, and the other end is communicated with the outdoor environment, so that the ventilation air duct 2 can communicate the indoor space with the outdoor environment, and in some preferred embodiments, the ventilation air duct 2 is also provided with a fresh air filter screen to filter the fresh air introduced by the ventilation air duct 2, and the ventilation air duct 2 can also be provided with a corresponding air valve to control whether the indoor space is communicated with the outdoor environment by controlling the on-off of the air valve;

[0051] The humidity adjusting assembly 3 is in the ventilation air duct 2, and the humidity adjusting assembly 3 can be driven to switch between the first position and the second position, when the humidity adjusting assembly 3 is in the first position, the airflow flowing through the ventilation air duct 2 passes through the humidity adjusting assembly 3 to adjust the humidity of the airflow, when the humidity adjusting assembly 3 is in the second position, the airflow flowing through the ventilation air duct 2 does not pass through the humidity adjusting assembly 3, that is, the humidity of the airflow flowing into or out of the ventilation air duct 2 is not adjusted by the humidity adjusting assembly 3.

[0052] In the technical scheme, the ventilation air duct 2 communicates the indoor space with the outdoor environment, so that the fresh air in the outdoor environment can enter the indoor space or the airflow in the indoor space can be discharged to the outdoor environment, and at the same time, the ventilation air duct 2 is also provided with the humidity adjusting assembly 3 to adjust the humidity of the airflow flowing therethrough, so that the humidity of the airflow in the indoor space meets the user's demand, that is, in the technical scheme, the ventilation air duct 2 integrates the functions of fresh air introduction or indoor exhaust and humidity adjustment of indoor airflow, and the structure is compact, so that the air conditioner occupies a smaller space during installation.

[0053] The aforementioned ventilation air duct 2 is preferably on the outdoor side, specifically, Figure 1As shown, the ventilation duct 2 is outside the rear wall of the air conditioner main body 1, and in actual installation, the ventilation duct 2 is accommodated in the through hole of the corresponding installation carrier (for example, the through hole of the cavity wall), so that the noise on the indoor side is small. It should be noted that, although the present application is exemplified by the wall-mounted air conditioner, in some cases, the air conditioner can also be a cabinet machine. For the wall-mounted air conditioner, the ventilation duct 2 is preferably arranged on the wall-mounted side of the air conditioner, which can improve the appearance consistency of the air conditioner and is more beautiful. At the same time, this design does not adversely affect the design of the air return port of the air conditioner. For most cabinet machines, the air return port is usually arranged on the back side of the air conditioner. The ventilation duct 2 can reduce the area of the air return port. At the same time, due to the design of the air return port, the back side of the cabinet machine needs to form a gap with the wall, which makes the length of the ventilation duct 2 longer and the structure less compact.

[0054] The first fan 13 can be a cross-flow fan, which can be controlled to rotate in a first direction to exhaust indoor dirty air or in a second direction to introduce outdoor fresh air. In a preferred embodiment, the air conditioner further comprises a second fan 4 arranged in the ventilation duct 2. The second fan 4 has a first rotation direction to drive outdoor air to flow into the room and a second rotation direction to drive indoor air to flow out of the room. In a specific embodiment, the second fan 4 is an axial fan.

[0055] In this technical solution, the second fan 4 arranged in the ventilation duct 2 can improve the power of introducing outdoor fresh air and exhausting indoor dirty air, meet the user's use demand, and more efficiently adjust the indoor air quality or humidity.

[0056] The humidity adjustment assembly 3 can be a dehumidifying component that can condense air flow, a humidifying component that can atomize water, etc. These methods can meet the customer's humidification or dehumidification needs, but they have relatively high use cost and complex structure design.

[0057] As a preferred embodiment, the humidity adjustment assembly 3 comprises a moisture absorbing disc 31 having a moisture absorbing and breathable film. Specifically, the moisture absorbing disc 31 further comprises a frame structure, and the moisture absorbing and breathable film is tensioned on the frame structure, so as to have a larger contact area with the air flow in the ventilation duct 2 and ensure the moisture absorbing effect. It should be particularly noted that the moisture absorbing and breathable film is used as the core component of the humidity adjustment assembly 3 in the present application, which can form a wet curtain by passing water through it to humidify the air flow passing through it, and can also absorb the water in the air flow in contact with it to dehumidify the air flow.

[0058] Specifically, referring toFigure 5 In this state, the aforementioned moisture-absorbing and breathable membrane is in its first position. In this position, the airflow within the ventilation duct 2 needs to pass through the moisture-absorbing and breathable membrane. If the air conditioner is in humidification mode, an external water source (such as a separately installed water tank, an external water tank, or even a faucet) can be controlled to supply water to the moisture-absorbing and breathable membrane. Driven by the second fan 4 (in the first rotation direction), fresh air from outside passes through the moisture-absorbing and breathable membrane and enters the indoor space. The airflow carrying the moisture on the membrane achieves its humidification effect. If the air conditioner is in dehumidification mode, the external water source can be shut off. At this time, driven by the second fan 4 (second rotation), the airflow in the internal space enters the ventilation duct 2 and comes into contact with the moisture-absorbing and breathable membrane. Part of this airflow is discharged to the outdoor space, carrying away the moisture absorbed by the membrane. The remaining dehumidified airflow is then returned to the indoor space driven by the first fan 13, thus achieving dehumidification of the indoor space. It should be noted that due to the combined driving action of the second fan 4 and the first fan 13, the airflow in the ventilation duct 2 forms a highly efficient flow on the indoor side. Simultaneously, the highly efficient moisture absorption of the moisture-absorbing and breathable membrane further enhances the dehumidification effect. The aforementioned moisture-absorbing and breathable membrane can be made of existing materials.

[0059] That is, as mentioned above, when the humidity adjustment component 3 is in the first position and the second fan 4 is operating in the first rotation direction, the humidity adjustment component 3 is in the humidification state; when the humidity adjustment component 3 is in the first position and the second fan 4 is operating in the second rotation direction, the humidity adjustment component 3 is in the dehumidification state. This ensures that the humidity adjustment component 3 in the present invention can switch between the humidification state and the dehumidification state in the same position, further simplifying the structural design of the air conditioner and making the structure more compact.

[0060] The aforementioned humidity adjustment component 3 can switch between a first position and a second position by pushing, pulling, or sliding. In a preferred implementation, the humidity adjustment component 3 also includes a rotary motor 32, which drives the moisture-absorbing disc 31 to rotate between the first and second positions. That is, in this technical solution, the position switching of the moisture-absorbing disc 31 is controlled by a rotary drive. This driving method requires the same amount of space as the internal space of the ventilation duct 2, thus not occupying unnecessary external space and making the air conditioner structure of the present invention more compact.

[0061] See Figure 4 and Figure 5 As shown, in some embodiments, the ventilation duct 2 has a receiving groove 21 on the channel sidewall, and when the humidity adjustment component 3 is in the second position, the moisture absorption plate 31 is located in the receiving groove 21.

[0062] When the air humidity adjustment assembly 3 is not needed, the moisture absorbing disc 31 can be controlled to be in the accommodating recess 21, so as to reduce the air flow resistance. In a preferred embodiment, the size of the accommodating recess 21 is matched with the size of the moisture absorbing disc, that is, when the moisture absorbing disc is in the second position, the side of the moisture absorbing disc away from the side wall of the air duct 2 is flush with the slot of the accommodating recess 21, and the length and width of the moisture absorbing disc are equal to the length and width of the accommodating recess 21, so as to reduce the air flow resistance as much as possible.

[0063] Referring to Figure 1 As shown in the drawings, the air duct 2 is provided with a water inlet 22, and a water supply component (not shown in the drawings) is in controllable communication with the moisture absorbing disc 31 through the water inlet 22. Specifically, a water outlet pipe of the water supply component is in communication with the water inlet 22, and the opening and closing of the water outlet pipe is controlled by a corresponding on-off valve (not shown in the drawings). When the air flow passing through the air duct 2 needs to be humidified by the humidity adjustment assembly 3, the on-off valve is controlled to be in communication, and water in the water supply component is transmitted to the moisture absorbing disc 31 through the water inlet 22 to form a water curtain, and the air flow passing through the air duct 2 carries the water in the water curtain into the indoor space, so as to achieve humidification.

[0064] In a preferred embodiment, one side of the moisture absorbing disc 31 has a moisture absorbing disc rotating shaft, the rotating shaft of the rotary motor 32 is coaxially connected with the moisture absorbing disc rotating shaft, and the end of the moisture absorbing disc rotating shaft away from the rotating shaft of the motor 32 has a blind hole cylinder extending in the axial direction. The opening of the blind hole cylinder is the water inlet 22, and the cylinder wall of the blind hole cylinder is provided with a plurality of spray holes extending in the length direction, so that the water supply of the water supply component is uniformly sprayed onto the moisture absorbing and breathable film through the spray holes. In this way, the structure is further simplified.

[0065] According to the embodiment of the present application, a control method of the air conditioner is also provided, which comprises the following steps:

[0066] obtaining a control instruction, the control instruction comprising one of running a fresh air mode, running a dehumidification mode or running a humidification mode;

[0067] controlling the running state of the first fan 13 and / or the second fan 4 and the position switching of the humidity adjustment assembly 3 according to the obtained control instruction.

[0068] The air quality parameter can be the CO2 concentration in the indoor space or other parameters (formaldehyde, PM2.5, etc.) that can represent the air quality in the indoor space, which is not particularly limited here.

[0069] The technical scheme, through detection of indoor air quality parameters or air humidity, controls the running state of the first fan 13 and the second fan 4 and the position switching of the humidity adjusting assembly 3, so that the air quality or air humidity in the indoor space meets the user's demand, thereby improving the use comfort of the air conditioner.

[0070] The foregoing control instruction can be a manual selection of the user, or the current air quality parameters or air humidity can be detected by using a corresponding sensor, such as a corresponding air sensor (for example, a CO2 concentration sensor), an air humidity sensor, and the like, and one of the running fresh air mode, the running dehumidification mode, or the running humidification mode is automatically determined according to the size relationship between the corresponding real-time parameters obtained and the corresponding preset values. This operation is a conventional processing manner in the industry, and the present application does not make a special description thereof.

[0071] In some embodiments, referring to Figure 6 As shown, controlling the running state of the first fan 13 and / or the second fan 4 and the position switching of the humidity adjusting assembly 3 according to the obtained control instruction specifically includes:

[0072] When the control instruction is the running fresh air mode, the second fan 4 is controlled to run in the first rotation direction (that is, the forward rotation of the axial flow fan in Figure 6 , and the humidity adjusting assembly 3 (that is, the humidification module in Figure 6 , and the like) is in the second position (that is, the closed state in Figure 6 , and the like). At this time, the humidity adjusting assembly 3 does not pass water, and it does not humidify, effectively preventing the flow from being hindered by the introduction of fresh air.

[0073] Specifically, a CO2 sensor is arranged on the indoor side to detect the CO2 concentration of the indoor space. When it is not lower than the set threshold value, the control instruction of the running fresh air mode is issued at this time, and the forward rotation of the axial flow fan is controlled to enable the external fresh air to enter the indoor space, thereby reducing the CO2 concentration of the indoor space and meeting the user's comfort, while the humidification module is in the closed state. Conversely, when it is lower than the set threshold value, the control instruction of the running fresh air mode is not issued at this time. The humidification module is in the closed state, and the axial flow fan is off, and no fresh air is introduced.

[0074] Referring to Figure 7 As shown, controlling the running state of the first fan 13 and / or the second fan 4 and the position switching of the humidity adjusting assembly 3 according to the obtained control instruction specifically includes:

[0075] When the control instruction is the running humidification mode, the second fan 4 is controlled to run in the first rotation direction, and the humidity adjusting assembly 3 is controlled to be in the first position and in the humidification state.

[0076] Taking the aforementioned humidification mode operation as an example of manual selection triggering, after the control system receives the control command for the humidification mode operation, the humidification module is switched from the second position to the first position (i.e., Figure 7 In the "on" state (hereinafter the same), the axial fan rotates forward, driving outdoor fresh air into the ventilation duct and through the humidification module to humidify the fresh air. Then, the fresh air enters the indoor space. When the indoor humidity sensor detects that the real-time indoor humidity is not lower than the humidity threshold, it controls the humidification module to switch to the second position (i.e.,...). Figure 7 The humidification module is turned off, but if the detected real-time humidity is lower than the humidity threshold, the humidification module is controlled to maintain continuous humidification at the second position.

[0077] During the operation of the air conditioner in fresh air mode or humidification mode, the first fan 13 can be controlled to rotate simultaneously. At this time, the air volume of the first fan 13 can be appropriately greater than that of the second fan 4, so that the first fan 13 can form a certain negative pressure on the air outlet side of the second fan 4. This is beneficial for the second fan 4 to introduce outdoor air, which obviously helps to ensure the smooth input of outdoor fresh air.

[0078] See also Figure 7 As shown, in some embodiments, controlling the operating state of the first fan 13 and / or the second fan 4 and switching the position of the humidity adjustment component 3 according to the acquired control commands further includes:

[0079] When the control command is to run the dehumidification mode, the second fan 4 is controlled to rotate in the second direction, and the humidity adjustment component 3 is controlled to be in the first position and in the dehumidification state.

[0080] Specifically, taking the aforementioned dehumidification mode as an example of manual selection triggering, after receiving the control command for the dehumidification mode, the humidification module is switched from the second position to the first position (i.e., Figure 7 When the axial flow fan reverses, it drives the indoor humid air into the ventilation duct 2 to come into contact with the humidification module. The humidification module absorbs the moisture in the humid air. At the same time, a portion of the air passes through the moisture-absorbing and breathable membrane under the drive of the second fan 4 and is discharged to the outside. This discharged airflow carries the moisture on the moisture-absorbing and breathable membrane to the outside, thereby improving the service life of the moisture-absorbing and breathable membrane. Meanwhile, another portion of the airflow that does not pass through the moisture-absorbing and breathable membrane enters the room, thus dehumidifying the indoor airflow.

[0081] In a preferred embodiment, in the process of running the dehumidification mode, i.e. the second fan 4 is running at the second rotation, the first fan 13 is also controlled to run to send air to the indoor, and the rotation speed of the first fan 13 should be relatively slow, so that the air supply amount is less than or slightly less than the air supply amount of the second fan 4, so as to prevent the negative pressure from being generated on the side close to the indoor of the moisture absorption breathable film, so that the air flow after being absorbed by the moisture can have a part to pass through the moisture absorption breathable film, ensure the moisture absorbed to be discharged to the outside, and at the same time, a larger part of the air flow after being absorbed by the moisture can be sent back to the indoor space, improve the dehumidification efficiency.

[0082] It should be noted that the moisture absorption breathable film used in the present application can realize the dual functions of humidification and dehumidification, has simple structure, low manufacturing cost, and long service life, and can even be maintenance-free.

[0083] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means 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 application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: an air conditioner body having a shell (11) in which an indoor heat exchanger (12) and a first fan (13) are arranged, the shell (11) being provided with an indoor return air inlet (111) at an air inlet side of the indoor heat exchanger (12) and an indoor air outlet (112) at an air outlet side of the indoor heat exchanger (12); a ventilation air duct (2) having one end communicated with the air inlet side or the air outlet side of the indoor heat exchanger (12) and the other end communicated with an outdoor environment; a humidity adjusting assembly (3) arranged in the ventilation air duct (2), the humidity adjusting assembly (3) being capable of being driven to switch between a first position and a second position, when the humidity adjusting assembly (3) is in the first position, air flowing through the ventilation air duct (2) passes through the humidity adjusting assembly (3) to adjust the humidity of the air flow, when the humidity adjusting assembly (3) is in the second position, air flowing through the ventilation air duct (2) does not pass through the humidity adjusting assembly (3); the humidity adjusting assembly (3) comprises a humidity absorbing disc (31) having a humidity absorbing and air permeable film, the humidity adjusting assembly (3) further comprises a rotary motor (32) driving the humidity absorbing disc (31) to switch between the first position and the second position in a rotary manner, the ventilation air duct (2) is provided with a water adding opening (22) through which a water supply component is controllably communicated with the humidity absorbing disc (31), one side of the humidity absorbing disc (31) has a humidity absorbing disc rotating shaft, a rotating shaft of the rotary motor (32) is coaxially connected with the humidity absorbing disc rotating shaft, one end of the humidity absorbing disc rotating shaft away from the rotating shaft of the rotary motor (32) has a blind hole cylinder body extending along an axial direction of the humidity absorbing disc rotating shaft, an opening of the blind hole cylinder body is the water adding opening (22), a plurality of spray holes are arranged on a cylinder wall of the blind hole cylinder body, water supplied by the water supply component is uniformly sprayed onto the humidity absorbing and air permeable film through the spray holes.

2. The air conditioner of claim 1, wherein Further comprising: a second fan (4) arranged in the ventilation air duct (2), the second fan (4) having a first rotation direction capable of driving outdoor air to flow indoors and a second rotation direction capable of driving indoor air to flow outdoors.

3. The air conditioner according to claim 2, wherein when the humidity adjusting assembly (3) is in the first position and the second fan (4) operates in the first rotation direction, the humidity adjusting assembly (3) is in a humidifying state, and when the humidity adjusting assembly (3) is in the first position and the second fan (4) operates in the second rotation direction, the humidity adjusting assembly (3) is in a dehumidifying state.

4. The air conditioner according to claim 1, wherein the ventilation air duct (2) has a containing groove (21) on a channel side wall, and when the humidity adjusting assembly (3) is in the second position, the humidity absorbing disc (31) is arranged in the containing groove (21).

5. A control method for an air conditioner as defined in claim 2 or 3, characterized by, comprising the following steps: obtaining a control instruction, the control instruction comprising one of operating a fresh air mode, operating a dehumidifying mode or operating a humidifying mode; According to the obtained control instruction, the running state of the first fan (13) and / or the second fan (4) and the position switching of the humidity adjusting assembly (3) are controlled.

6. The control method according to claim 5, characterized by According to the obtained control instruction, the running state of the first fan (13) and / or the second fan (4) and the position switching of the humidity adjusting assembly (3) are controlled. When the control instruction is to run the fresh air mode, the second fan (4) is controlled to run in the first rotation direction, and the humidity adjusting assembly (3) is controlled to be in the second position.

7. The control method according to claim 5, characterized by, According to the obtained control instruction, the running state of the first fan (13) and / or the second fan (4) and the position switching of the humidity adjusting assembly (3) are controlled. When the control instruction is to run the humidification mode, the second fan (4) is controlled to run in the first rotation direction, and the humidity adjusting assembly (3) is controlled to be in the first position, and the humidity adjusting assembly (3) is controlled to be in the humidification state.

8. The control method according to claim 5, characterized by, According to the obtained control instruction, the running state of the first fan (13) and / or the second fan (4) and the position switching of the humidity adjusting assembly (3) are controlled. When the control instruction is to run the dehumidification mode, the second fan (4) is controlled to run in the second rotation direction, and the humidity adjusting assembly (3) is controlled to be in the first position, and the humidity adjusting assembly (3) is controlled to be in the dehumidification state.

9. The control method according to any one of claims 6 to 8, characterized in that, When the second fan (4) is in the running state, the first fan (13) is also controlled to run.

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