Air conditioner and dehumidification operation control method thereof

Abstract

The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a dehumidification operation control method thereof. The method can perform backup dehumidification operation when a humidity sensor fails. During the backup dehumidification operation, a target shutdown state point in a dehumidification mode is determined based on changes in indoor ambient temperature, indoor heat exchanger temperature, and target humidity information set by a user. In addition, based on the characteristic that the higher the indoor humidity, the slower the indoor ambient temperature and indoor heat exchanger temperature drop, change data of the indoor ambient temperature and indoor heat exchanger temperature are collected during a data collection phase. The dehumidification load is indirectly inferred based on the collected data, thereby selecting conditions for stopping dehumidification without affecting the dehumidification operation of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a dehumidification operation control method thereof. Background Art

[0002] Air conditioners have been widely used in people's work and life. As air conditioner users' requirements for comfort during use of air conditioners gradually increase, some existing air conditioners have launched air conditioners with humidity control function. The air conditioner is equipped with a sensor with humidity detection function. The air conditioner can automatically adjust the dehumidification operation state of the air conditioner according to the indoor environment humidity status detected by the humidity sensor.

[0003] The dehumidification operation function controls the dehumidification operation state of the air conditioner according to the information detected by the humidity sensor. If the humidity sensor of the air conditioner fails, the dehumidification operation cannot be performed well. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an air conditioner and a dehumidification operation control method thereof. When an abnormality occurs in the indoor environmental humidity sensor, the control method can determine the target shutdown state point in the dehumidification mode based on the indoor environmental temperature, the indoor heat exchanger temperature and the target humidity information set by the user, thereby ensuring that the dehumidification operation of the air conditioner is not affected.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A dehumidification operation control method for an air conditioner is applied to the air conditioner, which includes a controller, an indoor unit, and an outdoor unit; the method is characterized in that:

[0007] The indoor unit includes an indoor heat exchanger, an indoor environment temperature sensor, an indoor environment humidity sensor, an indoor fan, an indoor heat exchanger temperature sensor and an indoor fan;

[0008] The indoor unit and the outdoor unit form a loop through a first refrigerant link pipe and a second refrigerant link pipe;

[0009] The control method steps are as follows:

[0010] S1: The controller receives the air conditioner operating parameter information set by the user and starts operating. It then determines whether the operating mode set by the user is the dehumidification mode. If the operating mode set by the user is the dehumidification mode, it detects the indoor humidity information and calculates the time t to detect whether the humidity sensor is faulty. If the humidity sensor is faulty, the controller controls the air conditioner to enter the backup dehumidification mode.

[0011] S2: The controller counts the time t and sets a time judgment threshold a. The controller compares the counted time t with the preset time judgment threshold a. If t ≥ a, the controller obtains the indoor ambient temperature Ta1 and the indoor heat exchanger temperature Te1, and the air conditioner operates in the second backup operation mode, while counting the operation time t2.

[0012] S3: In the second backup operation mode, a time judgment threshold b is set and the calculated time t2 is compared with the time judgment threshold b. If t2 ≥ b, the controller obtains the indoor ambient temperature Ta2 and the indoor heat exchanger temperature Te2, calculates ΔTa = Ta1 - Ta2 and ΔTe = Te1 - Te2, and obtains ΔT based on ΔTa and ΔTe. The controller then continues to obtain the indoor ambient temperature Ta3, and the air conditioner operates in the third backup operation mode.

[0013] S4: In the third backup operation mode, the temperature judgment threshold c=Ta1-△T is set, and the controller compares the obtained indoor ambient temperature Ta3 with the temperature judgment threshold c=Ta1-△T and the smaller value of 25℃. If Ta3≤min(c, 25), the air conditioner stops the dehumidification operation and detects the indoor ambient temperature information at the same time. The controller determines whether the indoor ambient temperature during the period when the air conditioner stops the dehumidification operation reaches the condition for restarting the dehumidification operation. If the actual indoor ambient temperature reaches the condition for starting the dehumidification operation, the dehumidification operation is started.

[0014] Preferably, in S2, if t<a, the air conditioner operates in the first backup operation mode.

[0015] Preferably, in S1, if the humidity sensor has not failed, the controller determines whether the actual indoor humidity has reached the target humidity set by the user. If the actual humidity has reached the set target humidity, the air conditioner operates normally. If the actual humidity has not reached the set target humidity, the air conditioner stops the dehumidification operation and detects the indoor environmental humidity information at the same time. The controller determines whether the indoor environmental humidity has reached the condition for restarting the dehumidification operation during the period when the air conditioner stops the dehumidification operation. If the actual indoor environmental humidity reaches the condition for starting the dehumidification operation, the dehumidification operation is started.

[0016] Preferably, in S4, if Ta3>min(c, 25), the controller determines whether the air conditioner user has adjusted the air conditioner setting parameters. If not, the air conditioner continues to operate in the third backup operation mode; if adjusted, the controller receives the air conditioner operation parameter information set by the user, and determines whether the operation mode set by the user is the dehumidification mode. If the operation mode set by the user is the dehumidification mode, if it is the dehumidification mode, it enters the second backup operation mode for operation.

[0017] Preferably, the target humidity is set to H. In S3, H≥50% and H<50% correspond to different ΔTa and ΔTe values, respectively, so that different ΔT values ​​correspond to higher and lower indoor humidity.

[0018] Preferably, the controller includes an indoor control mechanism and an outdoor control mechanism that can communicate with each other and control the indoor unit and the outdoor unit respectively. The indoor control mechanism can receive the air conditioner operating parameter information set by the user, and can also receive the operating status information of the indoor ambient temperature sensor, the indoor ambient humidity sensor, the indoor heat exchanger temperature sensor, and the indoor fan, and control the operating status of the air conditioner according to the received information.

[0019] An air conditioner, characterized by being applied to the dehumidification operation control method of the air conditioner described in any one of the above claims.

[0020] The present invention adopts the above-mentioned technical solution, a dehumidification operation control method for an air conditioner, which can perform backup dehumidification operation when the humidity sensor fails. It determines the target shutdown state point in the dehumidification mode based on the changes in the indoor ambient temperature, the indoor heat exchanger temperature and the target humidity information set by the user, thereby not affecting the dehumidification operation of the air conditioner.

[0021] Specifically, the backup dehumidification operation mode process is divided into three control stages: state stabilization stage (first backup operation mode), data collection stage (second backup operation mode), and dehumidification operation stage (third backup operation mode).

[0022] Stable state phase: This phase is the initial stage of backup operation and no temperature data collection and judgment is performed. During the stable state phase, the air conditioner operates in the first backup operation mode. After the unit has operated in the first backup operation mode for a period of time (after the unit operation stabilizes), it enters the data collection phase.

[0023] Data Collection Phase: This phase is entered after the state stabilization phase during backup operation. After entering the data collection phase, the air conditioner operates in the second backup mode. After a certain period of operation in the second backup phase, the data changes in the indoor ambient temperature and indoor heat exchanger temperature during the second backup phase are counted. Based on the data changes in the indoor ambient temperature and indoor heat exchanger temperature, the shutdown temperature difference data is obtained, and the dehumidification operation phase is entered.

[0024] Dehumidification Operation: This phase is entered after the data collection phase during backup operation. The air conditioner operates in the third backup mode and determines whether to stop dehumidification based on the shutdown temperature difference data.

[0025] When the humidity sensor is not faulty, the control method automatically operates according to target humidity information set by the user and actual humidity information detected by the humidity sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the air conditioner.

[0027] Figure 2 This is a logic diagram of the dehumidification control of the air conditioner.

[0028] Figure 3 Schematic diagram of the conditions for determining the temperature difference value △T. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

[0032] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Example 1:

[0034] like Figure 1 The air conditioner 1 shown includes a controller, an indoor unit 10 and an outdoor unit 20;

[0035] The indoor unit 10 includes an indoor heat exchanger 101, an indoor environment temperature sensor 102, an indoor environment humidity sensor, an indoor fan 103, an indoor heat exchanger temperature sensor 104 and an indoor fan 105;

[0036] The indoor unit 10 and the outdoor unit 20 form a loop through a first refrigerant link pipe 30 and a second refrigerant link pipe 40;

[0037] The controller includes an indoor control mechanism 106 and an outdoor control mechanism that can communicate with each other and control the indoor unit 10 and the outdoor unit 20 respectively. The indoor control mechanism 106 can receive the air conditioner operating parameter information set by the user, and can also receive the operating status information of the indoor ambient temperature sensor 102, the indoor ambient humidity sensor 103, the indoor heat exchanger temperature sensor 104, and the indoor fan 105, and control the operating status of the air conditioner according to the received information. Example 2:

[0038] like Figures 2 and 3 The steps of the dehumidification operation control method of an air conditioner are as follows:

[0039] S1: The controller receives the air conditioner operating parameter information set by the user and starts operating. It then determines whether the operating mode set by the user is the dehumidification mode. If the operating mode set by the user is the dehumidification mode, it detects the indoor humidity information and calculates the time t to detect whether the humidity sensor is faulty. If the humidity sensor is faulty, the controller controls the air conditioner to enter the backup dehumidification mode.

[0040] S2: The controller counts the time t and sets a time judgment threshold a. The controller compares the counted time t with the preset time judgment threshold a. If t ≥ a, the controller obtains the indoor ambient temperature Ta1 and the indoor heat exchanger temperature Te1, and the air conditioner operates in the second backup operation mode, while counting the operation time t2.

[0041] S3: In the second backup operation mode, a time judgment threshold b is set and the calculated time t2 is compared with the time judgment threshold b. If t2 ≥ b, the controller obtains the indoor ambient temperature Ta2 and the indoor heat exchanger temperature Te2, calculates ΔTa = Ta1 - Ta2 and ΔTe = Te1 - Te2, and obtains ΔT based on ΔTa and ΔTe. The controller then continues to obtain the indoor ambient temperature Ta3, and the air conditioner operates in the third backup operation mode.

[0042] S4: In the third backup operation mode, the temperature judgment threshold c=Ta1-△T is set, and the controller compares the obtained indoor ambient temperature Ta3 with the temperature judgment threshold c=Ta1-△T and the smaller value of 25℃. If Ta3≤min(c, 25), the air conditioner stops the dehumidification operation and detects the indoor ambient temperature information at the same time. The controller determines whether the indoor ambient temperature during the period when the air conditioner stops the dehumidification operation reaches the condition for restarting the dehumidification operation. If the actual indoor ambient temperature reaches the condition for starting the dehumidification operation, the dehumidification operation is started.

[0043] Furthermore, in S2, if t<a, the air conditioner operates in the first backup operation mode.

[0044] Furthermore, in S1, if the humidity sensor has not failed, the controller determines whether the actual indoor humidity has reached the target humidity set by the user. If the actual humidity has reached the set target humidity, the air conditioner operates normally. If the actual humidity has not reached the set target humidity, the air conditioner stops the dehumidification operation and detects the indoor environmental humidity information at the same time. The controller determines whether the indoor environmental humidity has reached the condition for restarting the dehumidification operation during the period when the air conditioner stops the dehumidification operation. If the actual indoor environmental humidity reaches the condition for starting the dehumidification operation, the dehumidification operation is started.

[0045] Further, in S4, if Ta3>min(c, 25), the controller determines whether the air conditioner user has adjusted the air conditioner setting parameters. If not, the air conditioner continues to operate in the third backup operation mode; if adjusted, the controller receives the air conditioner operation parameter information set by the user, and determines whether the operation mode set by the user is the dehumidification mode. If the operation mode set by the user is the dehumidification mode, if it is the dehumidification mode, it enters the second backup operation mode for operation.

[0046] Furthermore, the target humidity is set to H. In S3, H≥50% and H<50% correspond to different ΔTa and ΔTe values, respectively, so that different ΔT values ​​correspond to higher and lower indoor humidity.

[0047] like Figure 2 As shown, the specific control logic of the dehumidification operation control of an air conditioner is:

[0048] S1: Start the program and then go to step S2;

[0049] S2: receiving the air conditioner operating parameter information set by the user (such as operating mode, target temperature, target humidity, fan speed, etc.), and then proceeding to step S3;

[0050] S3: Determine whether the operation mode set by the user is the dehumidification mode. If the operation mode set by the user is the dehumidification mode, proceed to step S4; otherwise, proceed to step S30;

[0051] S4: Detect the indoor humidity information and calculate the time t, then proceed to step S5;

[0052] S5: Check whether the humidity sensor is faulty. If the humidity sensor is faulty, proceed to step S6; otherwise, proceed to step S10.

[0053] S6: Enter the backup dehumidification operation mode, and then enter step S7;

[0054] S7: Count the time t, and then go to step S8;

[0055] S8: Compare the counted time t with the preset time judgment threshold a. If t≥a, proceed to step S16; otherwise, proceed to step S9.

[0056] S9: The air conditioner operates in the first backup operation mode, and then enters step S7;

[0057] S10: Determine whether the actual indoor humidity reaches the target humidity set by the user. If the actual humidity reaches the set target humidity, proceed to step S13; otherwise, proceed to step S11;

[0058] S11: The air conditioner operates normally, and then enters step S12;

[0059] S12: Determine whether the air conditioner user has adjusted the air conditioner setting parameters. If the setting parameters have been changed, proceed to step S2; otherwise, proceed to step S4.

[0060] S13: The air conditioner stops dehumidification and detects indoor humidity information, and then proceeds to step S14;

[0061] S14: Determine whether the indoor ambient humidity during the period when the air conditioner stops dehumidification operation reaches the condition for restarting dehumidification operation (for example, the actual indoor ambient humidity is 5% higher than the set humidity). If the actual indoor ambient humidity reaches the condition for restarting dehumidification operation, the process proceeds to step S11; otherwise, the process proceeds to step S15.

[0062] S15: Determine whether the air conditioner user has adjusted the air conditioner setting parameters. If the setting parameters have been changed, proceed to step S2; otherwise, proceed to step S13.

[0063] S16: Obtain the indoor ambient temperature Ta1 and the indoor heat exchanger temperature Te1, and then proceed to step S17;

[0064] S17: The air conditioner operates in the second backup operation mode, and the operation time t2 is counted, and then the process goes to step S18;

[0065] S18: Compare the counted time t2 with the preset time judgment threshold b. If t2 ≥ b, proceed to step S19; otherwise, proceed to step S17.

[0066] S19: Obtain the indoor ambient temperature Ta2 and the indoor heat exchanger temperature Te2, calculate ΔTa (ΔTa=Ta1-Ta2) and ΔTe (ΔTe=Te1-Te2), and then proceed to step S20;

[0067] S20: Obtain ΔT based on ΔTa and ΔTe, and then proceed to step S21.

[0068] In this judgment step, the value of H is determined based on the indoor humidity percentage when the dehumidification mode is entered when the humidity sensor is operating normally during historical operation. If H is ≥ 50% in most cases when the dehumidification mode is entered during historical operation, the value of △T is selected based on the data with H ≥ 50%. Otherwise, the value of △T is selected based on the data with H < 50%.

[0069] S21: Obtain the indoor ambient temperature Ta3, and then proceed to step S22;

[0070] S22: The air conditioner operates in the third backup operation mode, and then enters step S23;

[0071] S23: Compare the obtained indoor ambient temperature Ta3 with the calculated temperature judgment threshold c (c=Ta1-△T) and the smaller value of 25. If Ta3≤min(c,25), proceed to step S27; otherwise, proceed to step S24.

[0072] S24: Determine whether the air conditioner user has adjusted the air conditioner setting parameters. If the setting parameters have been changed, proceed to step S25; otherwise, proceed to step S21.

[0073] S25: receiving the air conditioner operating parameter information set by the user (such as operating mode, target temperature, target humidity, fan speed, etc.), and then proceeding to step S26;

[0074] S26: Determine whether the operation mode set by the user is the dehumidification mode. If the operation mode set by the user is the dehumidification mode, proceed to step S20; otherwise, proceed to step S30;

[0075] S27: The air conditioner stops dehumidification and detects the indoor ambient temperature information, and then proceeds to step S28;

[0076] S28: Determine whether the indoor ambient temperature during the period when the air conditioner stops dehumidification operation has reached the condition to restart dehumidification operation (for example, the actual indoor ambient temperature is 1°C higher than the judgment threshold min(c, 25)). If the actual indoor ambient temperature reaches the condition to start dehumidification operation, the process proceeds to step S11; otherwise, the process proceeds to step S15.

[0077] S29: Determine whether the air conditioner user has adjusted the air conditioner setting parameters. If the setting parameters have been changed, proceed to step S25; otherwise, proceed to step S27.

[0078] S30: End the program.

[0079] Explanation of symbols:

[0080] t: time statistical parameter;

[0081] a: time judgment threshold, for example, a is preset to 5 minutes;

[0082] t2: time statistical parameter;

[0083] b: time judgment threshold, for example, b is preset to 10 minutes;

[0084] Ta1: indoor ambient temperature, °C;

[0085] Te1: indoor heat exchanger temperature, °C;

[0086] Ta2: Indoor ambient temperature during the second backup operation period, °C;

[0087] Te2: Indoor heat exchanger temperature during the second backup operation, °C;

[0088] Ta3: Indoor ambient temperature during the third backup operation period, °C;

[0089] △Ta: Indoor ambient temperature difference during the second backup operation period (△Ta=Ta1-Ta2), °C;

[0090] △Te: Indoor heat exchanger temperature difference during the second backup operation (△Te=Te1-Te2), °C;

[0091] △T: Temperature difference judgment value, △T value is obtained according to Table 1, ℃;

[0092] c: temperature judgment threshold, c=Ta1-△T, °C;

[0093] t3: time statistical parameters;

[0094] H: target humidity, %;

[0095] In this specific embodiment, in order to address the problem that the humidity sensor of the existing air conditioner cannot perform normal dehumidification operation when a fault occurs, the above-mentioned scheme can perform backup dehumidification operation when the humidity sensor fails. During the backup dehumidification operation, the target shutdown state point in the dehumidification mode is determined based on the changes in the indoor ambient temperature, the indoor heat exchanger temperature and the target humidity information set by the user, thereby not affecting the dehumidification operation of the air conditioner.

[0096] Specifically, the backup dehumidification operation mode process is divided into three control stages: state stabilization stage (first backup operation mode), data collection stage (second backup operation mode), and dehumidification operation stage (third backup operation mode).

[0097] Stable state phase: This phase is the initial stage of backup operation and no temperature data collection and judgment is performed. During the stable state phase, the air conditioner operates in the first backup operation mode. After the unit has operated in the first backup operation mode for a period of time (after the unit operation stabilizes), it enters the data collection phase.

[0098] Data Collection Phase: This phase is entered after the state stabilization phase during backup operation. After entering the data collection phase, the air conditioner operates in the second backup mode. After a certain period of operation in the second backup phase, the data changes in the indoor ambient temperature and indoor heat exchanger temperature during the second backup phase are counted. Based on the data changes in the indoor ambient temperature and indoor heat exchanger temperature, the shutdown temperature difference data is obtained, and the dehumidification operation phase is entered.

[0099] Dehumidification Operation: This phase is entered after the data collection phase during backup operation. The air conditioner operates in the third backup mode and determines whether to stop dehumidification based on the shutdown temperature difference data.

[0100] In the initial stage of backup dehumidification operation, it is necessary to operate in the stable state for a certain period of time before entering the subsequent dehumidification control stage to avoid the temperature and pressure data in the refrigeration system failing to reach a stable state in the initial stage of unit operation, thereby affecting the accuracy of the data collected in the subsequent data collection stage, affecting the dehumidification effect or affecting indoor comfort.

[0101] Since the higher the indoor humidity, the slower the indoor ambient temperature and indoor heat exchanger temperature drop, the change data of the indoor ambient temperature and indoor heat exchanger temperature are collected during the data collection phase. The dehumidification load is indirectly inferred based on the collected data, and the conditions for stopping dehumidification are selected.

[0102] The above scheme can assist in selecting dehumidification shutdown conditions by referring to the indoor ambient humidity characteristics when entering dehumidification mode during historical dehumidification operation. Furthermore, the dehumidification operation phase can be controlled based on the dehumidification shutdown judgment conditions selected during the data collection phase. The dehumidification shutdown conditions include the upper limit of the indoor ambient temperature for shutdown (e.g., 25°C in step S23 of the present invention), thus avoiding inaccurate dehumidification mode control caused by data collection deviations, which could affect the dehumidification effect.

[0103] like Figure 3 As shown, the dehumidification shutdown condition, ΔT, has the following characteristics: During the data collection phase, the smaller the change in indoor ambient temperature or indoor heat exchanger temperature, the larger the ΔT value. If the historical dehumidification operation data (when the humidity sensor is functioning properly) shows high indoor humidity, the ΔT value is selected based on the data where H ≥ 50%. Otherwise, the ΔT value is selected based on the data where H < 50%.

[0104] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A dehumidification operation control method for an air conditioner, applied to an air conditioner (1), the air conditioner (1) comprising a controller, an indoor unit (10) and an outdoor unit (20); characterized in that: The indoor unit (10) comprises an indoor heat exchanger (101), an indoor ambient temperature sensor (102), an indoor ambient humidity sensor (103), an indoor heat exchanger temperature sensor (104), and an indoor fan (105); The indoor unit (10) and the outdoor unit (20) form a loop via a first refrigerant linking pipe (30) and a second refrigerant linking pipe (40); The control method steps are as follows: S1: The controller receives the air conditioner operating parameter information set by the user and starts operating. It then determines whether the operating mode set by the user is the dehumidification mode. If the operating mode set by the user is the dehumidification mode, it detects the indoor humidity information and calculates the time t to detect whether the humidity sensor is faulty. If the humidity sensor is faulty, the controller controls the air conditioner to enter the backup dehumidification mode. S2: The controller counts the time t and sets a time judgment threshold a. The controller compares the counted time t with the preset time judgment threshold a. If t ≥ a, the controller obtains the indoor ambient temperature Ta1 and the indoor heat exchanger temperature Te1, and the air conditioner operates in the second backup operation mode, while counting the operation time t2. S3: In the second backup operation mode, a time judgment threshold b is set and the calculated time t2 is compared with the time judgment threshold b. If t2 ≥ b, the controller obtains the indoor ambient temperature Ta2 and the indoor heat exchanger temperature Te2, calculates ΔTa = Ta1 - Ta2 and ΔTe = Te1 - Te2, and obtains the temperature difference judgment value ΔT based on ΔTa and ΔTe. H ≥ 50% and H < 50% correspond to different ΔTa and ΔTe values, and thus different ΔT values. The controller continues to obtain the indoor ambient temperature Ta3, and the air conditioner operates in the third backup operation mode. S4: In the third backup operation mode, the temperature judgment threshold c=Ta1-△T is set, and the controller compares the obtained indoor ambient temperature Ta3 with the temperature judgment threshold c=Ta1-△T and the smaller value of 25℃. If Ta3≤min(c, 25), the air conditioner stops the dehumidification operation and detects the indoor ambient temperature information at the same time. The controller determines whether the indoor ambient temperature during the period when the air conditioner stops the dehumidification operation reaches the condition for restarting the dehumidification operation. If the actual indoor ambient temperature reaches the condition for starting the dehumidification operation, the dehumidification operation is started.

2. The air conditioner dehumidification operation control method according to claim 1, characterized in that: In S2, if t<a, the air conditioner operates in the first backup operation mode.

3. The dehumidification operation control method of an air conditioner according to claim 1, characterized in that: In S1, if the humidity sensor has not failed, the controller determines whether the actual indoor humidity has reached the target humidity set by the user. If the actual humidity has reached the set target humidity, the air conditioner operates normally. If the actual humidity has not reached the set target humidity, the air conditioner stops the dehumidification operation and detects the indoor environmental humidity information at the same time. The controller determines whether the indoor environmental humidity has reached the condition to restart the dehumidification operation during the period when the air conditioner stops the dehumidification operation. If the actual indoor environmental humidity reaches the condition to start the dehumidification operation, the dehumidification operation is started.

4. The dehumidification operation control method of an air conditioner according to claim 1, characterized in that: In S4, if Ta3>min(c, 25), the controller determines whether the air conditioner user adjusts the air conditioner setting parameters. If not, the air conditioner continues to operate in the third backup operation mode; If adjusted, the controller receives the air conditioner operating parameter information set by the user and determines whether the operating mode set by the user is the dehumidification mode. If the operating mode set by the user is the dehumidification mode, it enters the second backup operating mode.

5. The dehumidification operation control method of an air conditioner according to claim 1, characterized in that: The controller includes an indoor control mechanism (106) and an outdoor control mechanism that can communicate with each other and respectively control the indoor unit (10) and the outdoor unit (20). The indoor control mechanism (106) can receive the air conditioner operation parameter information set by the user, and can also receive the operation status information of the indoor environment temperature sensor (102), the indoor environment humidity sensor (103), the indoor heat exchanger temperature sensor (104), and the indoor fan (105), and control the operation status of the air conditioner according to the received information.

6. An air conditioner, characterized in that: A dehumidification operation control method for an air conditioner applied to any one of claims 1 to 5.

Images