Control Method and Device for Air Conditioner

Abstract

A control method and device for an air conditioner, relating to the technical field of air conditioners, are used to prevent the indoor temperature from dropping excessively after the air conditioner operates in the reheating and dehumidifying mode, so as to meet the comfort requirements of users. The method includes: obtaining a first indoor temperature and a first target temperature at a first moment; controlling the air conditioner to enter the reheating and dehumidifying mode when a first preset condition is met, where the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority of a Chinese patent application with the application number 202110768135.2, titled "Control Method and Device for Air Conditioner", which was filed with the Chinese Patent Office on July 7, 2021. The entire content of which is incorporated herein by reference. Technical Field

[0003] This application relates to the technical field of air conditioners, and particularly to a control method and device for an air conditioner. Background Art

[0004] A humid environment can damage people's physical health and also cause damage to furniture, electrical appliances, and clothing. When the air conditioner uses the reheating and dehumidification mode, the indoor temperature often drops excessively, resulting in low user comfort and affecting the user experience. Summary of the Invention

[0005] Some embodiments of this application provide a control method for an air conditioner, including:

[0006] Obtaining a first indoor temperature and a first target temperature at a first moment;

[0007] When a first preset condition is satisfied, controlling the air conditioner to enter the reheating and dehumidification mode, where the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature.

[0008] Some embodiments of this application also provide a control device for an air conditioner, including:

[0009] An obtaining module configured to obtain a first indoor temperature and a first target temperature at a first moment;

[0010] A processing module configured to control the air conditioner to enter the reheating and dehumidification mode when a first preset condition is satisfied, where the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of an air conditioner provided by an embodiment of this application;

[0012] Figure 2 It is a schematic structural diagram of another air conditioner provided by an embodiment of this application;

[0013] Figure 3(a) is a schematic diagram of the refrigerant flow direction of an air conditioner provided by an embodiment of the present application in a cooling mode or a reheating and dehumidifying mode;

[0014] Figure 3(b) is a schematic diagram of the refrigerant flow direction of an air conditioner provided by an embodiment of the present application in a cooling mode;

[0015] Figure 4 is a flowchart of a control method for an air conditioner provided by an embodiment of the present application;

[0016] Figure 5 is a flowchart of another control method for an air conditioner provided by an embodiment of the present application;

[0017] Figure 6 is a flowchart of another control method for an air conditioner provided by an embodiment of the present application;

[0018] Figure 7 is a flowchart of another control method for an air conditioner provided by an embodiment of the present application;

[0019] Figure 8(a) is a schematic diagram of the temperature change when switching from a cooling mode to a reheating and dehumidifying mode provided by an embodiment of the present application;

[0020] Figure 8(b) is a schematic diagram of the humidity change when switching from a cooling mode to a reheating and dehumidifying mode provided by an embodiment of the present application;

[0021] Figure 9 is a schematic diagram of the process of an air conditioner entering the reheating and dehumidifying mode after startup provided by an embodiment of the present application;

[0022] Figure 10 is a flowchart of another control method for an air conditioner provided by an embodiment of the present application;

[0023] Figure 11 is a flowchart of another control method for an air conditioner provided by an embodiment of the present application;

[0024] Figure 12 is a schematic diagram of the structure of a control device for an air conditioner provided by an embodiment of the present application;

[0025] Figure 13 is a schematic diagram of the structure of another control device for an air conditioner provided by an embodiment of the present application.

[0026] Description of the drawings: 1 - indoor fan; 2 - first indoor heat exchanger; 3 - second indoor heat exchanger; 4 - dehumidification solenoid valve; 5 - expansion valve; 6 - outdoor heat exchanger; 7 - outdoor fan; 8 - four-way valve; 9 - compressor; 10 - gas-liquid separator. Detailed Description

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0028] In some embodiments of the present application, the air conditioner provides a reheating and dehumidifying mode to meet the consumer's demand for dehumidification. In the related art, for the control method of the air conditioner, when the air conditioner receives an instruction to enter the reheating and dehumidifying mode, the air conditioner will first operate in the cooling mode to reduce the indoor temperature to the target temperature set by the user, and then operate in the reheating and dehumidifying mode. Since the indoor temperature will be further reduced when the air conditioner operates in the reheating and dehumidifying mode, the above control method will cause the indoor temperature to be lower than the target temperature, thereby affecting the user's comfort and increasing energy consumption at the same time.

[0029] The embodiment of the present application provides a control method for an air conditioner, including: after receiving an instruction indicating that the air conditioner enters the reheating and dehumidifying mode, obtaining the indoor temperature and the target temperature; when the indoor temperature is less than or equal to the sum of the first target temperature and the first preset temperature, and the first indoor temperature is greater than the first target temperature, controlling the air conditioner to enter the reheating and dehumidifying mode.

[0030] Based on the technical solution provided by the embodiment of the present application, the air conditioner can enter the reheating and dehumidifying mode before the indoor temperature reaches the target temperature, thereby avoiding the indoor temperature being too much lower than the target temperature caused by the air conditioner operating in the reheating and dehumidifying mode, which is beneficial to ensuring the user's comfort and saving the energy consumption of the air conditioner.

[0031] The control method for the air conditioner provided by the embodiment of the present application can be applied to an air conditioner with a reheating and dehumidifying mode, such as Figure 1 the air conditioner shown in FIG. 2. The embodiment of the present application does not limit the structure, model, etc. of the air conditioner with a reheating and dehumidifying mode.

[0032] Figure 1 FIG. 1 shows a schematic structural diagram of an air conditioner with a reheating and dehumidifying mode. As Figure 1 shown, the air conditioner includes an indoor fan 1, a first indoor heat exchanger 2, a second indoor heat exchanger 3, a dehumidification solenoid valve 4, an expansion valve 5, an outdoor heat exchanger 6, an outdoor fan 7, a four-way valve 8, a compressor 9, and a gas-liquid separator 10.

[0033] Among them, the first indoor heat exchanger 2 and the second indoor heat exchanger 3 are arranged front and back along the air outlet direction of the indoor fan 1. As the indoor fan 1 operates, the air flow formed by the indoor air can sequentially pass through the first indoor heat exchanger 2 and the second indoor heat exchanger 3.

[0034] In the reheat dehumidification mode of the air conditioner, the first indoor heat exchanger 2 absorbs heat as an evaporator, and the second indoor heat exchanger 3 releases heat as a condenser. After the indoor air is sucked in by the indoor fan, it first passes through the first indoor heat exchanger 2 to cool and dehumidify, and then passes through the second indoor heat exchanger 3 to heat up, achieving the reheat dehumidification effect.

[0035] Figure 1 The air conditioner shown has the following defects: When the air conditioner is in the heating mode, both the first indoor heat exchanger 2 and the second indoor heat exchanger 3 act as condensers. At this time, the indoor air first exchanges heat at the first indoor heat exchanger 2 and the temperature rises, and the air after heating up passes through the second indoor heat exchanger 3 and the temperature rises again. Since the refrigerant temperatures of the first indoor heat exchanger 2 and the second indoor heat exchanger 3 are the same, but the initial temperature of the air at the first indoor heat exchanger 2 is lower than the initial temperature of the air at the second indoor heat exchanger 3. Therefore, the temperature rise difference of the air when exchanging heat at the first indoor heat exchanger 2 is greater than the temperature rise difference of the air when exchanging heat at the second indoor heat exchanger 3. In this way, the change in the refrigerant temperature of the second indoor heat exchanger 3 is smaller, so the subcooling degree of the refrigerant flowing through the indoor unit decreases and the capacity decreases. Moreover, the first indoor heat exchanger 2 and the second indoor heat exchanger 3 are arranged one after the other, and the air resistance of the indoor unit is relatively large, and the energy consumption of the air conditioner will also increase accordingly.

[0036] In response to this, the embodiment of the present application provides another air conditioner, and the structure of the air conditioner can be referred to Figure 2 as shown. Figure 2 The air conditioner shown and Figure 1 the air conditioner shown are different in that: in the Figure 2 air conditioner shown, the first indoor heat exchanger 2 and the second indoor heat exchanger 3 are arranged in sequence along the vertical direction of the air outlet direction of the indoor fan 1.

[0037] In this way, a part of the air blown out by the indoor fan 1 passes through the first indoor heat exchanger 2, and another part passes through the second indoor heat exchanger 3, so as to reduce the air resistance of the indoor unit and lower the system energy consumption.

[0038] In some embodiments of the present application, Figure 2 in the air conditioner shown, a V shape or other shapes can be formed between the first indoor heat exchanger 2 and the second indoor heat exchanger 3, and no limitation is made thereto.

[0039] Figure 3(a) is a schematic diagram of the refrigerant flow direction of the Figure 2 air conditioner shown in the refrigeration mode or the reheat dehumidification mode. Figure 3(b) is a schematic diagram of the refrigerant flow direction of the Figure 2 air conditioner shown in the refrigeration mode.

[0040] In Figure 2The air conditioner shown is in the cooling mode. The four-way valve 8 is in the first state, that is, the d terminal and the c terminal of the four-way valve 8 are connected, the e terminal and the s terminal are connected, and the dehumidification solenoid valve 4 is in the open state. At this time, the outdoor heat exchanger 6 serves as a condenser, and the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit both serve as evaporators. The refrigerant in the compressor 9 flows into the outdoor heat exchanger 6 through the d terminal and the c terminal of the four-way valve 8, releases heat in the outdoor heat exchanger 6, then flows out of the outdoor unit through the expansion valve 5 and into the indoor unit. The refrigerant flowing into the indoor unit sequentially passes through the first indoor heat exchanger 2, the dehumidification solenoid valve 4, and the second indoor heat exchanger 3 in the indoor unit. At this time, the dehumidification solenoid valve 4 is in the open state, and the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit both serve as evaporators. The refrigerant absorbs heat at the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit. The air blown by the indoor fan 1 passes through the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit. Since the refrigerant absorbs heat during this process, heat exchange occurs between the air and the first indoor heat exchanger 2 and the second indoor heat exchanger 3 to reduce the temperature of the air, thereby reducing the indoor temperature. Subsequently, the refrigerant in the indoor unit flows into the gas-liquid separator 10 through the e terminal and the s terminal of the four-way valve 8, and then flows back to the compressor 9 to form a refrigeration cycle.

[0041] In Figure 2 The air conditioner shown is in the reheat dehumidification mode. The four-way valve 8 is in the first state, that is, the d terminal and the c terminal of the four-way valve 8 are connected, the e terminal and the s terminal are connected, and the dehumidification solenoid valve 4 is in the closed state. At this time, the outdoor heat exchanger 6 serves as a condenser, the first indoor heat exchanger 2 in the indoor unit serves as a condenser, and the second indoor heat exchanger 3 serves as an evaporator. The flow direction of the refrigerant in the air conditioning system in the reheat dehumidification mode is the same as that in the refrigeration cycle, and the refrigerant in the indoor unit flows through the first indoor heat exchanger 2 to release heat and then through the second indoor heat exchanger 3 to absorb heat. Among the air blown by the indoor fan 1, a part of the air is heated when passing through the first indoor heat exchanger 2, and another part of the air is cooled and dehumidified when passing through the second indoor heat exchanger 3. After that, these two parts of air are mixed, and the humidity of the indoor environment decreases while the temperature does not drop.

[0042] In Figure 2The air conditioner shown is in the heating mode. The four-way valve 8 is in the second state, that is, the d end and the e end of the four-way valve are connected, the c end and the s end are connected, and the dehumidification solenoid valve 4 is in the open state. At this time, the outdoor heat exchanger 6 serves as an evaporator, and both the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit serve as condensers. The refrigerant in the compressor 9 flows into the indoor unit through the d end and the e end of the four-way valve 8, and successively passes through the second indoor heat exchanger 3, the dehumidification solenoid valve 4, and the first indoor heat exchanger 2 in the indoor unit. At this time, the dehumidification solenoid valve 4 is in the open state, and both the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit serve as condensers. The refrigerant releases heat at the first indoor heat exchanger 2 and the second indoor heat exchanger 3 in the indoor unit. The indoor air is sucked in by the indoor fan 1 and passes through the second indoor heat exchanger 3 and the first indoor heat exchanger 2 in the indoor unit. Since the refrigerant releases heat during this process, heat exchange occurs between the air and the second indoor heat exchanger 3 and the first indoor heat exchanger 2, thereby increasing the indoor temperature. After the refrigerant flows out of the first indoor heat exchanger 2, it enters the outdoor heat exchanger 6 through the solenoid valve 5, absorbs heat at the outdoor heat exchanger 6, and then the refrigerant flows into the gas-liquid separator 10 through the c end and the s end of the four-way valve 8, and then flows back to the compressor 9 to form a heating cycle.

[0043] The following specifically introduces the embodiments provided by the present application in conjunction with the accompanying drawings of the specification.

[0044] As Figure 4 shown, the embodiments of the present application provide a control method for an air conditioner, and the method includes the following steps:

[0045] S101. Obtain the first indoor temperature and the first target temperature at the first moment.

[0046] Among them, the first moment is the moment when the instruction to enter the reheating and dehumidification mode is received. Alternatively, the first moment is after the moment when the instruction to enter the reheating and dehumidification mode is received.

[0047] In some embodiments of the present application, before receiving the instruction to enter the reheating and dehumidification mode, the air conditioner may be in the standby state or in the cooling mode, which is not limited.

[0048] The first target temperature is the target temperature at the first moment. The target temperature is the temperature that the user expects the indoor environment to reach. For example, when the user instructs the air conditioner to enter the reheating and dehumidification mode, the target temperature can be set using the remote control or on the panel of the air conditioner.

[0049] The first indoor temperature is the actual temperature in the room at the first moment. It should be understood that the indoor unit of the air conditioner may include a temperature sensor to detect the actual indoor temperature. In some embodiments of the present application, the temperature sensor may be disposed at the air inlet of the indoor unit. Of course, the temperature sensor may also be disposed at other positions of the indoor unit, and this is not limited.

[0050] In some embodiments of the present application, the first indoor humidity and the first target humidity may also be obtained at the first moment.

[0051] The first target humidity is the target humidity at the first moment. The target humidity is the humidity that the user expects the indoor environment to reach. For example, when the user instructs the air conditioner to enter the reheating and dehumidifying mode, the target humidity can be set using a remote control or on the panel of the air conditioner.

[0052] The first indoor humidity is the actual humidity in the room at the first moment. It should be understood that the indoor unit of the air conditioner may include a humidity sensor to detect the actual indoor humidity. In some embodiments of the present application, the humidity sensor may be disposed at the air inlet of the indoor unit. Of course, the humidity sensor may also be disposed at other positions of the indoor unit, and this is not limited.

[0053] In some embodiments of the present application, the humidity sensor and the temperature sensor may be integrated into one sensor, and this is not limited in the embodiments of the present application.

[0054] S102. When the first preset condition is satisfied, control the air conditioner to enter the reheating and dehumidifying mode.

[0055] Among them, the first preset condition is that the first indoor temperature is less than or equal to the sum of the first target temperature and the first preset temperature, and the first indoor temperature is greater than the first target temperature.

[0056] In the embodiments of the present application, the first preset temperature is preset. The first preset temperature can be determined by experiments, computer simulations, etc., and this is not limited.

[0057] In the embodiments of the present application, the first preset condition may further include that the first indoor humidity is greater than or equal to the difference between the first target humidity and the first preset humidity. It should be understood that the purpose of setting this condition is to control the air conditioner to enter the reheating and dehumidifying mode only when the indoor humidity is relatively high. In other words, when the indoor humidity is relatively low, the air conditioner is not controlled to enter the reheating and dehumidifying mode to save the energy consumption of the air conditioner.

[0058] In the embodiments of the present application, the first preset humidity is preset. The first preset humidity can be determined by experiments, computer simulations, etc., and this is not limited.

[0059] Based onFigure 4 In the embodiment shown, the air conditioner can enter the reheating and dehumidifying mode before the indoor temperature reaches the target temperature, thereby avoiding the indoor temperature being too much lower than the target temperature due to the operation of the reheating and dehumidifying mode of the air conditioner, which is beneficial to ensuring the comfort of users and saving the energy consumption of the air conditioner.

[0060] In some embodiments of the present application, based on Figure 4 the embodiment shown, such as Figure 5 shown, after step S102, the control method of the air conditioner may further include the following steps:

[0061] S103. Obtain the second indoor temperature, the second indoor humidity, the second target temperature, and the second target humidity at the second moment.

[0062] Wherein, the second moment is after the first moment. It should be understood that at the second moment, the air conditioner is still in the reheating and dehumidifying mode.

[0063] The second indoor temperature is the actual temperature in the room at the second moment. The second indoor humidity is the actual humidity in the room at the second moment. The second target temperature is the target temperature at the second moment. The second target humidity is the target humidity at the second moment.

[0064] S104. Control the air conditioner to enter the shutdown state when the second preset condition is satisfied.

[0065] Wherein, the second preset condition includes: the second indoor temperature is not within the temperature range, the upper limit value of the temperature range is equal to the sum of the second target temperature and the second preset temperature, and the lower limit value of the temperature range is equal to the second target temperature minus the second preset temperature.

[0066] The air conditioner entering the shutdown state means that the compressor of the air conditioner stops running, and the indoor fan and the outdoor fan of the air conditioner also stop running. At this time, the air conditioner stops blowing air.

[0067] S105. Control the air conditioner to enter the shutdown state when the third preset condition is satisfied.

[0068] Wherein, the third preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is less than or equal to the sum of the second target humidity and the first preset humidity.

[0069] S106. Control the air conditioner to continue running in the reheating and dehumidifying mode when the fourth preset condition is satisfied.

[0070] Wherein, the third preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is greater than the sum of the second target humidity and the first preset humidity.

[0071] Based on Figure 5 the embodiments shown, the air conditioner can enter the shutdown state when the second preset condition or the third preset condition is met, so as to not only meet the user's requirements for temperature and humidity, but also reduce energy consumption.

[0072] The following will illustrate with specific application scenarios Figure 5 the embodiments shown.

[0073] Scenario 1: When the air conditioner starts up, it receives an instruction from the user to enter the reheating and dehumidifying mode.

[0074] Based on Scenario 1, as Figure 6 shown, an embodiment of the present application provides a control method for an air conditioner, and the method includes the following steps:

[0075] Sa0: When the air conditioner starts up, it receives an instruction from the user to enter the reheating and dehumidifying mode.

[0076] Sa1: Obtain the target temperature Ts, the target humidity Hs, the indoor temperature Ti, and the indoor humidity Hi.

[0077] Sa2: Determine whether Ti is less than or equal to the sum of Ts and the first preset temperature dTS1.

[0078] In the embodiment of the present application, after the air conditioner starts up, it is default that Ti is greater than Ts.

[0079] If so, execute step Sa3; if not, execute step Sb1.

[0080] Sa3: Control the air conditioner to enter the reheating and dehumidifying mode.

[0081] Sa4: Obtain Ts, Hs, Ti, and Hi.

[0082] Sa5: Determine whether Ti is within the temperature range.

[0083] Among them, the upper limit value of the temperature range is equal to the sum of Ts and the second preset temperature dTs2. The lower limit value of the temperature range is equal to the difference between Ts and dTs2.

[0084] It should be understood that the second preset temperature is used to represent the reasonable fluctuation value of the target temperature. The second preset temperature is preset.

[0085] If so, execute step Sa6; if not, execute step Sa7.

[0086] Sa6: Determine whether Hi is less than the difference between HS and the first preset humidity dHs1.

[0087] If so, execute step Sa7; if not, execute step Sa4 again.

[0088] Sa7. Control the air conditioner to enter the shutdown state.

[0089] Sb1. Control the air conditioner to enter the cooling mode.

[0090] Sb2. Obtain Ts, Hs, Ti, and Hi.

[0091] Sb3. Determine whether Ti is less than or equal to the sum of TS and dTS1.

[0092] If so, execute step Sb4; if not, execute step Sb2 again.

[0093] Sb4. Control the air conditioner to enter the reheat dehumidification mode.

[0094] After the air conditioner enters the reheat dehumidification mode, step Sa4 can be continued to be executed.

[0095] Scenario 2. When the air conditioner is in the cooling mode, a command is received instructing the air conditioner to enter the reheat dehumidification mode.

[0096] Based on Scenario 2, as Figure 7 shown, an embodiment of the present application provides a control method for an air conditioner, and the method includes the following steps:

[0097] Sc0. Receive a command instructing the air conditioner to switch from the cooling mode to the reheat dehumidification mode from the user.

[0098] Sc1. Obtain Ts, Hs, Ti, and Hi.

[0099] Sc2. Determine whether Ti is less than or equal to the sum of TS and dTS1.

[0100] In an embodiment of the present application, when the air conditioner is in the cooling mode, it is default that Ti is greater than TS.

[0101] If so, execute step Sc8; if not, execute step Sd1.

[0102] Sc3. Determine whether Hi is greater than or equal to the difference between HS and dHs.

[0103] If so, execute step Sc4; if not, execute step Sc1 again.

[0104] Sc4. Control the air conditioner to enter the reheat dehumidification mode.

[0105] Sc5. Obtain Ts, Hs, Ti, and Hi.

[0106] Sc6. Determine whether Ti is within the temperature range.

[0107] If so, execute step Sc7; if not, execute step Sc8.

[0108] Sc7. Determine whether Hi is less than the difference between HS and the first preset humidity dHs1.

[0109] If so, execute step Sc8; if not, execute step Sc5.

[0110] Sc8. Control the air conditioner to enter the shutdown state.

[0111] Sd1. Control the air conditioner to continue running in the cooling mode.

[0112] Sd2. Obtain Ts, Hs, Ti, and Hi.

[0113] Sd3. Determine whether Ti is less than or equal to the sum of TS and dTS1.

[0114] If so, execute step Sd4; if not, execute step Sd2 again.

[0115] Sd4. Determine whether Hi is greater than or equal to the difference between HS and dHs.

[0116] If so, execute step Sd5; if not, execute step Sc8.

[0117] Sd5. Control the air conditioner to enter the reheating and dehumidifying mode.

[0118] After the air conditioner enters the reheating and dehumidifying mode, step Sc5 can be continued to be executed.

[0119] FIG. 8(a) shows a schematic diagram of the temperature change when the cooling mode is switched to the reheating and dehumidifying mode. As shown in FIG. 8(a), at time t1, Ti is less than the sum of Ts and dTs1, so that the air conditioner switches from the cooling mode to the reheating and dehumidifying mode. After the air conditioner enters the reheating and dehumidifying mode, the indoor temperature slowly decreases so that the indoor temperature can approach the target temperature.

[0120] FIG. 8(b) shows a schematic diagram of the humidity change when the cooling mode is switched to the reheating and dehumidifying mode. As shown in FIG. 8(b), at time t1, the air conditioner switches from the cooling mode to the reheating and dehumidifying mode. After the air conditioner enters the reheating and dehumidifying mode, the indoor humidity continuously decreases so that the indoor humidity approaches Hs - dHs1.

[0121] In some embodiments of the present application, the process of the air conditioner entering the reheating and dehumidifying mode after startup may include a startup stage, an action guarantee stage, an initial control stage, and a normal control stage.

[0122] The following combines Figure 9A detailed introduction is given to the process of an air conditioner entering the reheating and dehumidifying mode after startup.

[0123] 1. Temperature range determination stage

[0124] After the air conditioner starts up, it receives an instruction from the user to enter the reheating and dehumidifying mode. In response to the instruction from the user to enter the reheating and dehumidifying mode, the air conditioner enters the temperature range determination stage. In the temperature range determination stage, the compressor 9 and the outdoor fan 7 of the air conditioner stop running, the expansion valve 5 is in the closed state, the dehumidification solenoid valve 4 is in the open state, and the indoor fan 1 runs at an ultra-low speed.

[0125] After obtaining the target temperature and target humidity, the air conditioner enters the operation guarantee stage.

[0126] 2. Operation guarantee stage

[0127] Within the operation guarantee stage, the air conditioner adjusts the four-way valve to the first state, that is, the d end and the c end of the four-way valve 8 are connected, and the e end and the s end are connected. The opening degree of the expansion valve 5 is the preset initial opening degree, and the dehumidification solenoid valve 4 is in the open state, so that the refrigerant in the air conditioner can perform the reheating and dehumidifying cycle.

[0128] The outdoor fan 7 runs at the first rotational speed Va1 of the outdoor fan 7. Among them, Va1 is determined according to the outdoor temperature.

[0129] The indoor fan 1 starts to run at the first rotational speed Vb1 of the indoor fan. Among them, Vb1 is determined according to the wind speed gear preset by the user.

[0130] The operation guarantee stage can be divided into two time periods. In the first time period, the compressor 9 stops running. In the second time period, the compressor 9 starts to run at the first rotational speed Vc1 of the compressor 9.

[0131] 3. Initial control stage

[0132] In the initial control stage, the rotational speed of the compressor 9 switches from Vc1 to the second rotational speed Vc2 of the compressor 9. The rotational speed of the outdoor fan 7 is maintained at Va1. The rotational speed of the indoor fan 1 is maintained at Vb1. In the latter part of the initial control stage, that is, in the Figure 9 third time period in, the expansion valve is in the fully open state (that is, the opening degree of the expansion valve 5 is the maximum value), and the dehumidification solenoid valve switches to the closed state. In this case, the air conditioner truly realizes the function of reheating and dehumidifying.

[0133] 4. Normal control stage

[0134] In the normal control stage, the expansion valve is in the fully open state, the dehumidification solenoid valve is in the closed state, and the rotational speed of the indoor fan 1 is maintained at Vb1.

[0135] In addition, during the normal control phase, on the one hand, by adjusting the rotational speed of the compressor 9, the indoor temperature is precisely controlled to approach the target temperature, and the indoor humidity is precisely controlled to approach the target humidity. On the other hand, by adjusting the rotational speed of the outdoor fan 7, the indoor temperature is precisely controlled to approach the target temperature.

[0136] As Figure 10 shown, the method for adjusting the rotational speed of the compressor 9 may include the following steps:

[0137] S201. Obtain the target temperature and target humidity within the current cycle.

[0138] S202. Determine the target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and target humidity within the current cycle.

[0139] Among them, the evaporation temperature of the refrigerant is the evaporation critical temperature at which the refrigerant changes from a liquid to a gas in the evaporator. In the reheating and dehumidifying mode of the air conditioner, the temperature of the indoor heat exchanger (such as the first indoor heat exchanger 2) serving as the evaporator is usually detected as the measured evaporation temperature of the refrigerant. Then the above-mentioned target evaporation temperature is the temperature that the indoor heat exchanger (such as the first indoor heat exchanger 2) serving as the evaporator needs to reach.

[0140] In some embodiments of the present application, the target evaporation temperature can be calculated according to the following formula (1):

[0141] Te0 = A × Ts - B - dTe (1)

[0142] Among them, Te0 represents the target evaporation temperature, Ts represents the target temperature, dTe is the third preset temperature, and A and B are constants determined according to the target humidity.

[0143] In some embodiments of the present application, the above formula (1) can be a formula fitted through the psychrometric chart. It should be understood that A and B determined for different target humidities are different constants.

[0144] For example, when the target humidity Hs = 40%, Te0 = A1 × Ts - B1 - dTe;

[0145] When the target humidity Hs = 50%, Te0 = A2 × Ts - B2 - dTe;

[0146] When the target humidity Hs = 60%, Te0 = A3 × Ts - B3 - dTe.

[0147] A1, A2, A3, B1, B2, B3 are all constants.

[0148] S203. Adjust the rotational speed of the compressor according to the target evaporation temperature.

[0149] It should be understood that the rotational speed of the compressor can be adjusted periodically.

[0150] Exemplarily, the rotational speed of the compressor in the current cycle can be determined according to the following formula (2):

[0151] Ft(n) = Ft(n - 1) + ΔF (2)

[0152] Wherein, Ft(n) represents the rotational speed of the compressor in the current cycle. Ft(n - 1) represents the rotational speed of the compressor in the previous cycle. ΔF represents the rotational speed adjustment value of the compressor.

[0153] In some embodiments of the present application, in order to ensure the normal operation of the compressor, using Ft to represent the rotational speed of the compressor, Ftmin ≤ Ft ≤ Ftmax, Ftmin represents the minimum value of the preset rotational speed of the compressor, and Ftmax represents the maximum value of the preset rotational speed of the compressor. Therefore, if Ft(n) calculated according to formula (2) is greater than Ftmax, then control the compressor to operate at Ftmax; if Ft(n) is less than Ftmin, then control the compressor to operate at Ftmin.

[0154] In some embodiments of the present application, ΔF can be determined according to the following formula (3):

[0155] △F = Kp × [ePs(n) - ePs(n - 1)] + Ki × ePs(n) (3)

[0156] Wherein, ePs(n) = Te(n) - Te0. Te(n) represents the actual temperature of the first indoor heat exchanger 2 in the current cycle.

[0157] ePs(n - 1) = Te(n - 1) - Te0. Te(n - 1) represents the actual temperature of the first indoor heat exchanger 2 in the previous cycle.

[0158] In addition, it is default set that ePs(0) = ePs(1). Both Kp and Ki are constants.

[0159] In some embodiments of the present application, in order to ensure the normal operation of the compressor, △Fmin ≤ △F ≤ △Fmax, △Fmin represents the minimum value of the rotational speed adjustment value of the compressor, and △Fmax represents the maximum value of the rotational speed adjustment value of the compressor. Therefore, if △F calculated according to formula (3) is greater than △Fmax, then determine Ft(n) = Ft(n - 1) + △Fmax; if △F calculated according to formula (3) is less than △Fmin, then determine Ft(n) = Ft(n - 1) + △Fmin.

[0160] Based on Figure 10In the illustrated embodiment, a reasonable target evaporation temperature is determined according to the target temperature and the target humidity, and the rotational speed of the compressor is continuously adjusted so that the temperature of the indoor heat exchanger serving as the evaporator can reach the target evaporation temperature, thereby achieving precise control of the indoor temperature and the indoor humidity.

[0161] As Figure 11 shown, the method for adjusting the rotational speed of the outdoor fan 7 may include the following steps:

[0162] S301. Obtain the target temperature and the indoor temperature of the current cycle, as well as the target temperature and the indoor temperature in the previous cycle.

[0163] S302. Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and the indoor temperature of the current cycle, as well as the target temperature and the indoor temperature in the previous cycle.

[0164] As a possible implementation manner, first determine the temperature change value according to the target temperature and the indoor temperature of the current cycle, as well as the target temperature and the indoor temperature in the previous cycle; then, determine the rotational speed adjustment value of the outdoor fan according to the temperature change value.

[0165] In some embodiments of the present application, the temperature change value can be determined according to the following formula (4):

[0166] △Nfo = Kfp × [eTi(n) - eTi(n - 1)] + Kfi × eTi(n) (4)

[0167] Wherein, △Nfo represents the temperature change value. Both Kfp and Kfi are constants.

[0168] eTi(n) = Ti(n) - Ts(n). Wherein, Ti(n) represents the indoor temperature of the current cycle, and Ts(n) represents the target temperature of the current cycle.

[0169] eTi(n - 1) = Ti(n - 1) - Ts(n - 1). Wherein, Ti(n - 1) represents the indoor temperature of the previous cycle, and Ts(n - 1) represents the target temperature of the previous cycle.

[0170] In addition, by default, eTi(0) = eTi(1).

[0171] Wherein, the initial value of the outdoor fan is the first rotational speed Va1 of the outdoor fan 7.

[0172] In some embodiments of the present application, the rotational speed adjustment value of the outdoor fan can be represented by a rotational speed step. Exemplarily, Table 1 shows the corresponding relationship between the rotational speed step and the temperature change value.

[0173] Table 1

[0174] Rotation speed step (STEP) Temperature change value (℃) +5STEP +100 < △Nfo +3STEP +50 < △Nfo ≤ +100 +2STEP +20 < △Nfo ≤ +50 +1STEP +5 < △Nfo ≤ +20 0 (i.e., no change) -5 < △Nfo ≤ +5 -1STEP -20 < △Nfo ≤ -5 -2STEP -50 < △Nfo ≤ -20 -3STEP -100 < △Nfo ≤ -50

[0175] -5STEP △Nfo ≤ -100

[0176] In some embodiments of the present application, to ensure the normal operation of the outdoor fan, the rotation speed step needs to be within a certain range, that is, STEPmin ≤ STEP ≤ STEPmax. STEPmin is the minimum value of the rotation speed step, and STEPmax is the maximum value of the rotation speed step.

[0177] Based on Figure 11 the shown embodiment, determine the rotation speed adjustment value of the outdoor fan according to the target temperature and indoor temperature of the current cycle, as well as the target temperature and indoor temperature in the previous cycle, so that the outdoor fan can operate at an appropriate rotation speed, thereby enabling the indoor temperature to reach the target temperature.

[0178] In some embodiments of the present application, the process of the air conditioner switching from the cooling mode to the reheating and dehumidifying mode may include a cooling operation stage, an initial control stage, and a normal control stage.

[0179] Among them, the operating states of the various components of the air conditioner in the cooling operation stage may refer to the relevant descriptions of the cooling mode. The initial control stage and the normal control stage may refer to the above descriptions and will not be elaborated here.

[0180] Embodiments of the present application can divide the control device of the air conditioner into functional modules or functional units according to the above method examples. For example, each functional module or functional unit can be corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware, or in the form of a software functional module or functional unit. Among them, the division of modules or units in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0181] Figure 12 Show a schematic diagram of the composition of a control device of an air conditioner provided by an embodiment of the present application. As Figure 12 shown, the control device of the air conditioner includes a processing module 31 and an acquisition module 32.

[0182] The acquisition module 32 is used to acquire the first indoor temperature and the first target temperature at the first moment;

[0183] The processing module 31 is used to control the air conditioner to enter the reheating and dehumidifying mode when the first preset condition is met. The first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and the first preset temperature, and the first indoor temperature is greater than the first target temperature.

[0184] In some embodiments, the acquisition module 32 is further configured to acquire the second indoor temperature, the second indoor humidity, the second target temperature, and the second target humidity at a second moment; the processing module 31 is further configured to control the air conditioner to enter a shutdown state when the second preset condition or the third preset condition is satisfied; wherein, the second preset condition includes: the second indoor temperature is not within the temperature range, the upper limit value of the temperature range is equal to the sum of the second target temperature and the second preset temperature, and the lower limit value of the temperature range is equal to the second target temperature minus the second preset temperature; the third preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is less than or equal to the sum of the second target humidity and the first preset humidity; the processing module 31 is further configured to control the air conditioner to continue running the reheating and dehumidifying mode when the fourth preset condition is satisfied, and the fourth preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is greater than the sum of the second target humidity and the first preset humidity.

[0185] In some embodiments, the acquisition module 32 is further configured to acquire the target temperature and the target humidity within the current cycle. The processing module 31 is further configured to determine the target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and the target humidity within the current cycle, where the target evaporation temperature is the temperature that the indoor heat exchanger serving as the evaporator needs to reach; and adjust the rotational speed of the compressor according to the target evaporation temperature.

[0186] In some embodiments, the calculation formula of the target evaporation temperature is: Te0 = A × Ts - B - dTe. Where Te0 represents the target evaporation temperature, Ts represents the target temperature, dTe is the third preset temperature, and A and B are constants determined according to the target humidity.

[0187] In some embodiments, the acquisition module 32 is further configured to acquire the target temperature and the indoor temperature within the current cycle, and the target temperature and the indoor temperature within the previous cycle. The processing module 31 is further configured to determine the rotational speed adjustment value of the outdoor fan of the air conditioner according to the target temperature and the indoor temperature within the current cycle, and the target temperature and the indoor temperature within the previous cycle.

[0188] In the case of adopting an integrated module, the control device of the air conditioner includes: a storage unit, a processing unit, and an interface unit. The processing unit is used for control and management. For example, the processing unit is used to support the control device to execute the steps performed by the processing module 31 in the foregoing embodiments; the interface unit is used to support the steps performed by the acquisition module 32 in the foregoing embodiments. For example, the interaction with the relative humidity sensor, the first temperature sensor, the second temperature sensor, the indoor fan, and the compressor in the foregoing embodiments. The storage unit is used to store the program code and data of the control device.

[0189] Wherein, taking the processing unit as the processor, the storage unit as the memory, and the interface unit as the communication interface as an example. Refer toFigure 13 As shown in Figure 13 , an embodiment of the present invention further provides a control device for an air conditioner, including a memory 41, a processor 42, a bus 43, and a communication interface 44; the memory 41 is used to store computer-executable instructions, and the processor 42 is connected to the memory 41 through the bus 43; when the control device of the air conditioner runs, the processor 42 executes the computer-executable instructions stored in the memory 41, so that the control device of the air conditioner executes the control method of the air conditioner provided in the above embodiment.

[0190] In a specific implementation, as an embodiment, the processor 42 (42-1 and 42-2) may include one or more CPUs, such as Figure 13 the CPU0 and CPU1 shown in Figure 13 . And as an embodiment, the control device of the air conditioner may include multiple processors 42, such as Figure 13 the processor 42-1 and the processor 42-2 shown in Figure 13 . Each CPU in these processors 42 may be a single-core processor (Single-CPU) or a multi-core processor (Multi-CPU). The processor 42 here may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0191] The memory 41 may be a read-only memory 41 (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 41 may exist independently and be connected to the processor 42 through the bus 43. The memory 41 may also be integrated with the processor 42.

[0192] In a specific implementation, the memory 41 is used to store the data in this application and the computer-executable instructions corresponding to the software program for executing this application. The processor 42 can perform various functions of the control device of the air conditioner by running or executing the software program stored in the memory 41 and calling the data stored in the memory 41.

[0193] A communication interface 44, using any device such as a transceiver, is used to communicate with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Networks (WLAN), etc. The communication interface 44 may include a receiving unit to implement the receiving function and a transmitting unit to implement the transmitting function.

[0194] The bus 43 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus 43 may be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, Figure 13 it is only represented by a thick line in the figure, but it does not mean that there is only one bus or one type of bus.

[0195] An embodiment of this application also provides an air conditioner, which includes the control device of the above-mentioned air conditioner.

[0196] An embodiment of this application also provides a computer-readable storage medium, including computer-executable instructions, which when running on a computer, cause the computer to execute any of the above methods.

[0197] An embodiment of this application provides a computer program product containing computer instructions, which when running on a computer, cause the computer to execute any of the above methods.

[0198] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer-executable instructions. When the computer-executable instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer-executable instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer-executable instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0199] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present application.

Claims

1. An air conditioner, comprising: An outdoor unit including a compressor configured to compress refrigerant; An indoor unit including an indoor fan configured to supply air into a room; A temperature sensor configured to detect a first indoor temperature and a second indoor temperature; A humidity sensor configured to detect a first indoor humidity and a second indoor humidity; A controller configured to: Obtain the first indoor temperature, a first target temperature, the first indoor humidity, and a first target humidity at a first moment; If it is determined that a first preset condition is satisfied, control the air conditioner to enter a reheating and dehumidifying mode; wherein, the reheating and dehumidifying mode means a mode in which the air conditioner heats the dehumidified cold air and then sends it into the room; and If it is determined that the first preset condition is not satisfied, control the air conditioner to enter a refrigeration mode; After controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the second indoor temperature, the second indoor humidity, a second target temperature, and a second target humidity at a second moment; and If it is determined that one of a second preset condition and a third preset condition is satisfied, control the air conditioner to enter a shutdown state; Wherein, the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature; and the first indoor humidity is greater than or equal to the difference between the first target humidity and a first preset humidity.

2. The air conditioner according to claim 1, wherein, After the step of if it is determined that the first preset condition is not satisfied, control the air conditioner to enter the refrigeration mode, the controller is further configured to: If it is determined that a fourth preset condition is satisfied, control the air conditioner to operate in the reheating and dehumidifying mode; Wherein, the fourth preset condition includes: the second indoor temperature is within a temperature range, and the second indoor humidity is greater than the sum of the second target humidity and the first preset humidity.

3. The air conditioner according to claim 1, wherein, The indoor unit further includes an indoor heat exchanger; After controlling the air conditioner to enter the reheating and dehumidifying mode if it is determined that the first preset condition is satisfied, the controller is further configured to: Obtain a target temperature and a target humidity within a current period; Determine a target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and the target humidity within the current period, the target evaporation temperature being the temperature that the indoor heat exchanger serving as an evaporator needs to reach; and Adjust the rotational speed of the compressor according to the target evaporation temperature.

4. The air conditioner according to claim 3, wherein, The calculation formula for the target evaporation temperature is: Te0 = A×Ts - B - dTe; Wherein, Te0 is the target evaporation temperature, Ts is the target temperature, dTe is a third preset temperature, and A and B are constants determined according to the target humidity.

5. The air conditioner according to claim 2, wherein, The indoor unit further includes an indoor heat exchanger; After controlling the air conditioner to enter the reheating and dehumidifying mode if it is determined that the first preset condition is satisfied, the controller is further configured to: Obtain a target temperature and a target humidity within a current period; Determine a target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and the target humidity within the current period, the target evaporation temperature being the temperature that the indoor heat exchanger serving as an evaporator needs to reach; and Adjust the rotational speed of the compressor according to the target evaporation temperature.

6. The air conditioner according to claim 1, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and the indoor temperature in the current cycle, as well as the target temperature and the indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and the indoor temperature in the current cycle, and the target temperature and the indoor temperature in the previous cycle.

7. The air conditioner according to claim 2, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and the indoor temperature in the current cycle, as well as the target temperature and the indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and the indoor temperature in the current cycle, and the target temperature and the indoor temperature in the previous cycle.

8. The air conditioner according to claim 3, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and the indoor temperature in the current cycle, as well as the target temperature and the indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and the indoor temperature in the current cycle, and the target temperature and the indoor temperature in the previous cycle.

9. An air conditioner, comprising: An outdoor unit including a compressor configured to compress refrigerant; An indoor unit including an indoor fan configured to supply air to the indoor; A temperature sensor configured to detect a first indoor temperature and a second indoor temperature; A humidity sensor configured to detect a first indoor humidity and a second indoor humidity; And A controller configured to: Obtain the first indoor temperature and the first target temperature at a first moment; If it is determined that the first preset condition is satisfied, control the air conditioner to enter the reheating and dehumidifying mode; the reheating and dehumidifying mode means that the air conditioner heats the dehumidified cold air and then sends it into the indoor; And If it is determined that the first preset condition is not satisfied, control the air conditioner to enter the refrigeration mode; After controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the second indoor temperature and the second target temperature at a second moment; And If it is determined that one of the second preset condition and the third preset condition is satisfied, control the air conditioner to enter the shutdown state; Wherein, the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and the first preset temperature, and the first indoor temperature is greater than the first target temperature; The second preset condition includes: the second indoor temperature is outside the temperature range; the upper limit value of the temperature range is equal to the sum of the second target temperature and the second preset temperature, and the lower limit value of the temperature range is equal to the difference between the second target temperature and the second preset temperature; The third preset condition includes: the temperature in the second chamber is within the temperature range, and the humidity in the second chamber is less than or equal to the difference between the second target humidity and the first preset humidity.

10. The air conditioner according to claim 9, wherein, After determining that the first preset condition is not satisfied and controlling the air conditioner to enter the cooling mode, the controller is further configured to: If it is determined that the fourth preset condition is satisfied, control the air conditioner to operate the reheating and dehumidifying mode; Wherein, the fourth preset condition includes: the temperature in the second chamber is within the temperature range.

11. The air conditioner according to claim 9, wherein, The indoor unit includes an indoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and target humidity in the current cycle; According to the target temperature and target humidity in the current cycle, determine the target evaporation temperature in the reheating and dehumidifying mode, where the target evaporation temperature is the temperature that the indoor heat exchanger serving as the evaporator needs to reach; and Adjust the rotational speed of the compressor according to the target evaporation temperature.

12. The air conditioner according to claim 11, wherein, The calculation formula for the target evaporation temperature is: Te0 = A×Ts - B - dTe; Wherein, Te0 is the target evaporation temperature, Ts is the target temperature, dTe is the third preset temperature, and A and B are constants determined according to the target humidity.

13. The air conditioner according to claim 10, wherein, The indoor unit includes an indoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and target humidity in the current cycle; According to the target temperature and target humidity in the current cycle, determine the target evaporation temperature in the reheating and dehumidifying mode, where the target evaporation temperature is the temperature that the indoor heat exchanger serving as the evaporator needs to reach; and Adjust the rotational speed of the compressor according to the target evaporation temperature.

14. The air conditioner according to claim 9, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle.

15. The air conditioner according to claim 10, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger, After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle.

16. The air conditioner according to claim 11, wherein, The outdoor unit includes an outdoor fan and an outdoor heat exchanger; After determining that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the controller is further configured to: Obtain the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle; And Determine the rotational speed adjustment value of the outdoor fan according to the target temperature and indoor temperature in the current cycle, and the target temperature and indoor temperature in the previous cycle.

17. A control method for an air conditioner, wherein, The air conditioner includes: An outdoor unit including a compressor configured to compress the refrigerant; An indoor unit including an indoor fan configured to supply air into the room; A temperature sensor configured to detect a first indoor temperature and a second indoor temperature; A humidity sensor configured to detect a first indoor humidity and a second indoor humidity; and A controller coupled to the compressor, the indoor fan, the temperature sensor, and the humidity sensor; The control method includes: Obtain the first indoor temperature, the first target temperature, the first indoor humidity, and the first target humidity at a first moment; If it is determined that the first preset condition is satisfied, control the air conditioner to enter the reheating and dehumidifying mode; wherein, the reheating and dehumidifying mode means a mode in which the air conditioner heats the dehumidified cold air and then sends it into the room; and If it is determined that the first preset condition is not satisfied, control the air conditioner to enter the refrigeration mode; wherein, the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and the first preset temperature, and the first indoor temperature is greater than the first target temperature; the first indoor humidity is greater than or equal to the difference between the first target humidity and the first preset humidity; After the step of if it is determined that the first preset condition is satisfied and control the air conditioner to enter the reheating and dehumidifying mode, the control method further includes: Obtain the target temperature and target humidity in the current cycle; Determine the target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and target humidity in the current cycle, and the target evaporation temperature is the temperature that the indoor heat exchanger serving as the evaporator needs to reach; and Adjust the rotational speed of the compressor according to the target evaporation temperature.

18. The control method according to claim 17, wherein, After the step of controlling the air conditioner to enter the reheating and dehumidifying mode, the control method further includes: Obtain the second indoor temperature, the second indoor humidity, the second target temperature, and the second target humidity at a second moment; If it is determined that one of the second preset condition and the third preset condition is satisfied, control the air conditioner to enter the shutdown state; and If it is determined that the fourth preset condition is satisfied, control the air conditioner to continue operating in the reheating and dehumidifying mode; Wherein, the second preset condition includes: the second indoor temperature is outside the temperature range; the upper limit value of the temperature range is equal to the sum of the second target temperature and the second preset temperature, and the lower limit value of the temperature range is equal to the difference between the second target temperature and the second preset temperature; The third preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is less than or equal to the difference between the second target humidity and the first preset humidity; The fourth preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is greater than the sum of the second target humidity and the first preset humidity.

19. A control method for an air conditioner, wherein, The air conditioner includes: An outdoor unit including a compressor configured to compress the refrigerant; An indoor unit, including an indoor fan, is configured to supply air to the indoor space; a temperature sensor, configured to detect a first indoor temperature and a second indoor temperature; a humidity sensor, configured to detect a first indoor humidity and a second indoor humidity; and a controller, coupled to the compressor, the indoor fan, the temperature sensor, and the humidity sensor respectively; The control method includes: acquiring the first indoor temperature and a first target temperature at a first moment; if it is determined that a first preset condition is satisfied, controlling the air conditioner to enter a reheating and dehumidifying mode; the reheating and dehumidifying mode means a mode in which the air conditioner heats the dehumidified cold air and then sends it into the indoor space; and if it is determined that the first preset condition is not satisfied, controlling the air conditioner to enter a cooling mode; wherein, the first preset condition includes: the first indoor temperature is less than or equal to the sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature; after the step of if it is determined that the first preset condition is satisfied and controlling the air conditioner to enter the reheating and dehumidifying mode, the control method further includes: acquiring a target temperature and a target humidity within a current period; determining a target evaporation temperature in the reheating and dehumidifying mode according to the target temperature and the target humidity within the current period, the target evaporation temperature being the temperature that the indoor heat exchanger serving as an evaporator needs to reach; and adjusting the rotational speed of the compressor according to the target evaporation temperature.

20. The control method according to claim 19, wherein after the step of controlling the air conditioner to enter the reheating and dehumidifying mode, the control method further includes: acquiring the second indoor temperature and the second indoor humidity at a second moment; if it is determined that one of a second preset condition and a third preset condition is satisfied, controlling the air conditioner to enter a shutdown state; and if it is determined that a fourth preset condition is satisfied, controlling the air conditioner to continue operating in the reheating and dehumidifying mode; wherein, the second preset condition includes: the second indoor temperature is outside a temperature range; the upper limit value of the temperature range is equal to the sum of a second target temperature and a second preset temperature, and the lower limit value of the temperature range is equal to the difference between the second target temperature and the second preset temperature; the third preset condition includes: the second indoor temperature is within the temperature range, and the second indoor humidity is less than or equal to the difference between the second target humidity and a first preset humidity; the fourth preset condition includes: the second indoor temperature is within the temperature range.

Images