A fan control method in air conditioner and air conditioner

Abstract

The present application relates to the technical field of air conditioning, and discloses a method for controlling a fan in an air conditioner and an air conditioner, the method comprising: determining the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of an indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjusting the speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature. By dynamically adjusting the fan speed in the above manner, the cooling efficiency of the air conditioner is ensured, and the occurrence of water in the air supply is reduced.

Description

Technical Field

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

[0002] With the development of technology, air conditioners have become popular rapidly. In cooling mode, air conditioners use the cold energy carried by the refrigerant to cool the air passing through the indoor heat exchanger, thereby cooling the room.

[0003] However, when the air conditioner is running in some environments, the amount of air cooled per unit time is large, and the cold capacity carried by the refrigerant is not enough to cool down the air passing through the indoor heat exchanger into cold air. At this time, there will be some cold air and a small amount of hot air inside the air duct. The mixture of cold and hot air in the air duct may condense into water and be blown out with the wind, forming water-carrying air. Summary of the invention

[0004] The present application provides a method for controlling a fan in an air conditioner and an air conditioner, which are used to reduce the occurrence of water in the air supply.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling a fan in an air conditioner, the method comprising:

[0006] Determining a current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of the indoor heat exchanger;

[0007] If the current temperature difference is within the first temperature range or within the second temperature range, the speed of the fan in the air conditioner is adjusted; wherein the first temperature range is a temperature range less than or equal to the first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to the second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0008] In some optional implementations, if the current temperature difference is within the first temperature range or within the second temperature range, adjusting the speed of the fan in the air conditioner includes:

[0009] If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or

[0010] If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

[0011] In some optional implementations, before reducing the rotation speed of the fan in the air conditioner, the method further includes:

[0012] Determine that the current rotation speed of the fan is greater than a first rotation speed; wherein the first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

[0013] In some optional implementations, before increasing the rotation speed of the fan in the air conditioner, the method further includes:

[0014] Determine that the current rotation speed of the fan is less than a second rotation speed; wherein the second rotation speed is the fan rotation speed corresponding to the user-set gear position of the air conditioner.

[0015] In some optional implementations, the first temperature difference is determined by:

[0016] Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment;

[0017] The second temperature difference is determined by:

[0018] According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

[0019] In a second aspect, an embodiment of the present application provides an air conditioner, the air conditioner comprising a controller, a fan, an indoor heat exchanger, a first temperature measuring device arranged at an indoor air inlet side of the air conditioner, and a second temperature measuring device arranged at an outlet of the indoor heat exchanger, wherein:

[0020] The fan is used to exchange heat with the indoor heat exchanger through wind power;

[0021] The indoor heat exchanger is used to cool the gas;

[0022] The first temperature measuring device is used to collect a first temperature on the air inlet side;

[0023] The second temperature measuring device is used to collect the second temperature at the outlet of the indoor heat exchanger;

[0024] The controller is used to:

[0025] Determine the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjust the speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0026] In some optional implementation manners, the controller is specifically used to:

[0027] If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or

[0028] If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

[0029] In some optional implementations, before reducing the speed of the fan in the air conditioner, the controller is further configured to:

[0030] Determine that the current rotation speed of the fan is greater than a first rotation speed; wherein the first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

[0031] In some optional implementations, before increasing the speed of the fan in the air conditioner, the controller is further configured to:

[0032] Determine that the current rotation speed of the fan is less than a second rotation speed; wherein the second rotation speed is the fan rotation speed corresponding to the user-set gear position of the air conditioner.

[0033] In some optional implementations, the first temperature difference is determined by:

[0034] Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment;

[0035] The second temperature difference is determined by:

[0036] According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

[0037] In a third aspect, an embodiment of the present application provides a fan control device for an air conditioner, comprising:

[0038] a temperature difference determination module, for determining a current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger;

[0039] A speed adjustment module is used to adjust the speed of the fan in the air conditioner if the current temperature difference is within a first temperature range or a second temperature range; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; and the first temperature difference and the second temperature difference are determined based on the first temperature.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for controlling a fan in an air conditioner as described in any one of the first aspects is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0042] Figure 1 A schematic diagram of the external structure of an air conditioner provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of an air-conditioning outdoor unit provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a first air-conditioning indoor unit provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a second air-conditioning indoor unit provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the position of a first temperature measuring device provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the position of a second temperature measuring device provided in an embodiment of the present application;

[0048] Figure 7 A schematic flow chart of a first method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0049] Figure 8A schematic flow chart of a second method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0050] Fig. 9 A schematic flow chart of a third method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0051] Fig.10 A schematic flow chart of a fourth method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0052] Fig.11 A schematic flow chart of a fifth method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0053] Fig.12 A schematic flow chart of a sixth method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0054] Fig.13 A schematic flow chart of a seventh method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0055] Fig.14 A schematic flow chart of an eighth method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0056] Fig.15 A schematic flow chart of a ninth method for controlling a fan in an air conditioner provided in an embodiment of the present application;

[0057] Fig.16 A schematic diagram of a first correspondence relationship and a second correspondence relationship provided in an embodiment of the present application;

[0058] Fig.17 A schematic diagram of the structure of a fan control device in a first air conditioner provided in an embodiment of the present application;

[0059] Fig.18 A schematic diagram of the structure of a fan control device in a second air conditioner provided in an embodiment of the present application;

[0060] Fig.19 A schematic diagram of the structure of a fan control device in a third air conditioner provided in an embodiment of the present application;

[0061] Fig. 20 A schematic block diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0063] In the description of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two devices. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0065] In cooling mode, the air conditioner uses the cold energy carried by the refrigerant to cool the air passing through the indoor heat exchanger, thereby cooling the room.

[0066] However, when the air conditioner is running in some environments, the amount of air cooled per unit time is large, and the cold capacity carried by the refrigerant is not enough to cool down the air passing through the indoor heat exchanger into cold air. At this time, there will be some cold air and a small amount of hot air inside the air duct. The mixture of cold and hot air in the air duct may condense into water and be blown out with the wind, forming water-carrying air.

[0067] Based on this, an embodiment of the present application provides a method for controlling a fan in an air conditioner and an air conditioner, the method comprising: determining the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjusting the rotation speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0068] See also Figure 1 , which is a schematic diagram of the external structure of an air conditioner provided in this embodiment, the air conditioner 10 includes an outdoor unit 20 and an indoor unit 30 .

[0069] See also Figure 2As shown, the outdoor unit 20 includes a compressor, a condenser, an expansion valve and an evaporator; the refrigeration cycle of the air conditioner is performed by using the compressor, the condenser, the expansion valve and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air. The outdoor unit also includes an outdoor fan and an outdoor fan motor, and the outdoor fan motor is used to provide power to drive the outdoor fan to rotate.

[0070] See also Figure 3 As shown, the indoor unit 31 includes a controller, a fan, an indoor heat exchanger, a first temperature measuring device arranged at the indoor air inlet side, and a second temperature measuring device arranged at the outlet of the indoor heat exchanger, wherein:

[0071] The fan is used to exchange heat with the indoor heat exchanger through wind power;

[0072] The indoor heat exchanger is used to cool the gas;

[0073] The first temperature measuring device is used to collect a first temperature on the air inlet side;

[0074] The second temperature measuring device is used to collect the second temperature at the outlet of the indoor heat exchanger;

[0075] The controller is configured to perform:

[0076] Determine the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjust the speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0077] Of course, the above controllers can also be set up independently and not integrated into the indoor unit. Figure 4 As shown, the indoor unit 32 includes a fan, an indoor heat exchanger, a first temperature measuring device arranged at the indoor air inlet side, and a second temperature measuring device arranged at the outlet of the indoor heat exchanger; wherein the controller is respectively connected to the first temperature measuring device, the second temperature measuring device and the fan, and is used to:

[0078] Determine the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjust the speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0079] The first temperature measuring device can be arranged at the air inlet of the indoor unit. Figure 5 As shown;

[0080] The second temperature measuring device can be arranged at the outlet pipe of the indoor heat exchanger (i.e. the total outlet of the indoor heat exchanger) to accurately measure the temperature of the refrigerant after passing through the indoor heat exchanger. Figure 6 shown.

[0081] In the above scheme, the temperatures on different air inlet sides correspond to different first temperature differences representing humid environments and second temperature differences representing dry environments; after determining the current temperature difference between the first temperature on the air inlet side and the second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is less than or equal to the first temperature difference, it means that the indoor environment is relatively humid and it is easy to form water in the supply air. By adjusting the speed of the fan, the amount of air cooled per unit time is adjusted to reduce the occurrence of water in the supply air; if the current temperature difference is greater than or equal to the second temperature difference, it means that the indoor environment is relatively dry and it is difficult to form water in the supply air. By adjusting the speed of the fan, the cooling efficiency of the air conditioner is guaranteed; by dynamically adjusting the fan speed in the above manner, the cooling efficiency of the air conditioner is guaranteed and the occurrence of water in the supply air is reduced.

[0082] The following will be combined with the accompanying drawings and specific embodiments to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0083] The present application embodiment provides a first method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Figure 7 As shown, the method may include:

[0084] Step S701: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0085] During implementation, the current temperature difference between the temperature on the air inlet side of the air conditioner and the temperature at the outlet of the indoor heat exchanger reflects the indoor dryness and wetness conditions, and the indoor dryness and wetness conditions will affect the probability of water condensation in the air duct; based on this, this embodiment needs to determine the current temperature difference between the first temperature on the air inlet side and the second temperature at the outlet of the indoor heat exchanger.

[0086] Step S702: If the current temperature difference is within the first temperature range or within the second temperature range, the rotation speed of the fan in the air conditioner is adjusted.

[0087] Among them, the first temperature range is a temperature range less than or equal to a first temperature difference characterizing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference characterizing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0088] As mentioned above, the current temperature difference reflects the indoor dryness and wetness, and the indoor dryness and wetness will affect the probability of condensation in the air duct. If the current temperature difference is less than or equal to the first temperature difference, it means that the indoor environment is relatively humid and it is easy to form water in the air supply. By adjusting the speed of the fan, the amount of air cooled per unit time is adjusted to reduce the occurrence of water in the air supply; if the current temperature difference is greater than or equal to the second temperature difference, it means that the indoor environment is relatively dry and it is difficult to form water in the air supply. By adjusting the speed of the fan, the cooling efficiency of the air conditioner is guaranteed.

[0089] In the above scheme, the temperatures on different air inlet sides correspond to different first temperature differences that characterize a humid environment and second temperature differences that characterize a dry environment; after determining the current temperature difference between the first temperature on the air inlet side and the second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is less than or equal to the first temperature difference, it means that the indoor environment is relatively humid and it is easy to form water in the supply air. By adjusting the speed of the fan, the amount of air cooled per unit time is adjusted to reduce the occurrence of water in the supply air; if the current temperature difference is greater than or equal to the second temperature difference, it means that the indoor environment is relatively dry and it is difficult to form water in the supply air. By adjusting the speed of the fan, the cooling efficiency of the air conditioner is guaranteed; by dynamically adjusting the fan speed in the above manner, the cooling efficiency of the air conditioner is guaranteed, while reducing the occurrence of water in the supply air, thereby improving the user experience.

[0090] The present application embodiment provides a second method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Figure 8 As shown, the method may include:

[0091] Step S801: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0092] The specific implementation of step S801 can refer to the above embodiment and will not be described again here.

[0093] Step S802: If the current temperature difference is within the first temperature range, reducing the rotation speed of the fan in the air conditioner.

[0094] During implementation, if the current temperature difference is less than or equal to the first temperature difference (within the above-mentioned first temperature range), it means that the indoor environment is relatively humid. Relative to the current indoor environment, the amount of air cooled per unit time is too much, and the cold capacity carried by the refrigerant is not enough to cool the air passing through the indoor heat exchanger into cold air. There will be some hot air inside the air duct, which is easy to form water in the supply air.

[0095] Based on this, it is necessary to reduce the speed of the fan and reduce the amount of air cooled per unit time, so that the cold carried by the refrigerant can fully cool the air passing through the indoor heat exchanger and reduce the hot air inside the air duct.

[0096] This embodiment does not limit the specific implementation method of reducing the rotation speed of the fan, such as reducing a preset adjustment amount based on the current rotation speed of the fan.

[0097] In the above scheme, if the current temperature difference is less than or equal to the first temperature difference, it means that the indoor environment is relatively humid and it is easy to form water in the supply air. By reducing the speed of the fan, the amount of air cooled per unit time is reduced, thereby reducing the occurrence of water in the supply air.

[0098] The present application embodiment provides a third method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig. 9 As shown, the method may include:

[0099] Step S901: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0100] The specific implementation of step S901 can refer to the above embodiment and will not be described again here.

[0101] Step S902: If the current temperature difference is within the second temperature range, increasing the rotation speed of the fan in the air conditioner.

[0102] Since the fan speed is adjusted dynamically in this embodiment, dehumidification will continue during the operation of the air conditioner, and the fan speed may be relatively low during the adjustment process, which will affect the cooling efficiency of the air conditioner.

[0103] During implementation, if the current temperature difference is greater than or equal to the second temperature difference (within the above-mentioned second temperature range), it means that the indoor environment is relatively dry. Relative to the current indoor environment, the coldness carried by the refrigerant is sufficient to cool the air passing through the indoor heat exchanger into cold air, and it is difficult to form water in the supply air.

[0104] Based on this, by increasing the speed of the fan, the amount of air cooled per unit time is increased, thereby improving the cooling efficiency of the air conditioner.

[0105] This embodiment does not limit the specific implementation method of increasing the rotation speed of the fan, such as increasing a preset adjustment amount based on the current rotation speed of the fan.

[0106] In the above scheme, if the current temperature difference is greater than or equal to the second temperature difference, it means that the indoor environment is relatively dry and it is difficult to form water in the air supply. By increasing the speed of the fan, the amount of air cooled per unit time is increased, and the cooling efficiency of the air conditioner is improved.

[0107] The present application embodiment provides a fourth method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.10 As shown, the method may include:

[0108] Step S1001: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0109] The specific implementation of step S1001 can refer to the above embodiment and will not be repeated here.

[0110] Step S1002: If the current temperature difference is within the third temperature range, the rotation speed of the fan in the air conditioner is not adjusted.

[0111] Wherein, the third temperature range is a temperature range between the first temperature difference and the second temperature difference.

[0112] In practice, if the current temperature difference is greater than the first temperature difference and less than the second temperature difference (within the third temperature range), it means that the indoor environment is neither humid nor dry. The amount of air cooled per unit time is reasonable relative to the current indoor environment, and it is not easy to form water in the air supply, nor does it affect the cooling efficiency of the air conditioner. Therefore, in this case, there is no need to adjust the fan speed.

[0113] Based on the above Figures 8 to 10 The embodiment shown in the present application provides a fifth method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.11 As shown, the method may include:

[0114] This step S1101: determines a current temperature difference between a first temperature on an air inlet side of the air conditioner and a second temperature at an outlet of the indoor heat exchanger.

[0115] Step S1102: Determine the temperature range within which the current temperature difference lies.

[0116] If the current temperature difference is within the first temperature range, execute step S1103; if the current temperature difference is within the second temperature range, execute step S1104; if the current temperature difference is within the third temperature range, execute step S1105.

[0117] Step S1103: reducing the rotation speed of the fan in the air conditioner.

[0118] Step S1104: increasing the rotation speed of the fan in the air conditioner.

[0119] Step S1105: The rotation speed of the fan in the air conditioner is not adjusted.

[0120] The specific implementation of steps S1101 to S1105 can refer to the above embodiment and will not be described again here.

[0121] The present application embodiment provides a sixth method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.12 As shown, the method may include:

[0122] Step S1201: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0123] The specific implementation of step S1201 can refer to the above embodiment and will not be repeated here.

[0124] Step S1202: If the current temperature difference is within the first temperature range and the current rotation speed of the fan is greater than the first rotation speed, the rotation speed of the fan in the air conditioner is reduced.

[0125] The first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

[0126] During implementation, when the current temperature difference is less than or equal to the first temperature difference (within the above-mentioned first temperature range), it is easy for the supply air to carry water; but if the fan speed is already very small at this time (not greater than the fan speed corresponding to the lowest working gear of the air conditioner), further reducing the fan speed will not ensure the normal operation of the air conditioner.

[0127] Based on this, before reducing the speed of the fan, it is first determined that the current speed of the fan is greater than the first speed, to ensure that the air conditioner can work normally after reducing the speed of the fan.

[0128] Correspondingly, the embodiment of the present application provides a seventh method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.13 As shown, the method may include:

[0129] Step S1301: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0130] The specific implementation of step S1301 can refer to the above embodiment and will not be repeated here.

[0131] Step S1302: If the current temperature difference is within the first temperature range and the current rotation speed of the fan is not greater than the first rotation speed, the rotation speed of the fan in the air conditioner is not adjusted.

[0132] As mentioned above, when the current temperature difference is less than or equal to the first temperature difference (within the above-mentioned first temperature range), it is easy for the supply air to carry water; but if the fan speed is already very small at this time (not greater than the fan speed corresponding to the lowest working gear of the air conditioner), further reducing the fan speed will not ensure the normal operation of the air conditioner.

[0133] Based on this, when the current speed of the fan is not greater than the first speed, even if the current temperature difference is less than or equal to the first temperature difference, the speed of the fan will not be reduced, thereby avoiding the situation where the air conditioner cannot work normally due to reducing the speed of the fan.

[0134] The present application embodiment provides an eighth method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.14 As shown, the method may include:

[0135] Step S1401: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0136] The specific implementation of step S1401 can refer to the above embodiment and will not be repeated here.

[0137] Step S1402: If the current temperature difference is within the second temperature range and the current rotation speed of the fan is less than the second rotation speed, the rotation speed of the fan in the air conditioner is increased.

[0138] The second speed is a fan speed corresponding to a user-set gear position of the air conditioner.

[0139] During implementation, if the current temperature difference is greater than or equal to the second temperature difference (within the above-mentioned second temperature range), it is difficult to form water-carrying air supply; but if the fan speed can already meet the indoor cooling requirements at this time (not less than the fan speed corresponding to the user-set gear of the air conditioner), further increasing the fan speed will cause waste of power consumption.

[0140] Based on this, before increasing the rotation speed of the fan, it is first determined that the current rotation speed of the fan is less than the second rotation speed, to ensure that no power consumption is wasted after increasing the rotation speed of the fan.

[0141] Correspondingly, the embodiment of the present application provides a ninth method for controlling a fan in an air conditioner, which can be applied to the above controller, such as Fig.15As shown, the method may include:

[0142] Step S1501: Determine the current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of an indoor heat exchanger.

[0143] The specific implementation of step S1501 can refer to the above embodiment and will not be repeated here.

[0144] Step S1502: If the current temperature difference is within the second temperature range and the current rotation speed of the fan is not less than the second rotation speed, the rotation speed of the fan in the air conditioner is not adjusted.

[0145] As mentioned above, if the current temperature difference is greater than or equal to the second temperature difference (within the above-mentioned second temperature range), it is difficult to form air supply with water; but if the fan speed can already meet the indoor cooling requirements at this time (not less than the fan speed corresponding to the user-set gear of the air conditioner), further increasing the fan speed will cause waste of power consumption.

[0146] Based on this, when the current speed of the fan is not less than the second speed, even if the current temperature difference is greater than or equal to the second temperature difference, the speed of the fan is no longer increased, thereby avoiding power consumption waste caused by increasing the speed of the fan.

[0147] In some optional implementations, the first temperature difference is determined by:

[0148] According to a preset first corresponding relationship, a first temperature difference corresponding to the first temperature is determined; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment.

[0149] Referring to Table 1, the present embodiment presets different preset temperatures on the air inlet side corresponding to the temperature difference representing the humid environment (first corresponding relationship):

[0150] Table 1

[0151] Temperature on the air inlet side Characterizes the temperature difference in a humid environment Th1 Ed1 Th2 Ed2 Th3 Ed3 Th4 Ed4 … … Thn Edn

[0152] The above first correspondence can be obtained by measuring the air conditioner running in a humid environment. After determining the first temperature on the air inlet side of the air conditioner, the temperature difference (first temperature difference) corresponding to the first temperature and representing the humid environment can be determined according to the above first correspondence.

[0153] In some optional implementations, the second temperature difference is determined by:

[0154] According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

[0155] Referring to Table 2, the present embodiment presets different preset temperatures on the air inlet side corresponding to the temperature difference representing the drying environment (second corresponding relationship):

[0156] Table 2

[0157] Temperature on the air inlet side Characterize the temperature difference of the dry environment Th1 Eu1 Th2 Eu2 Th3 Eu3 Th4 Eu4 … … Thn Eun

[0158] The second corresponding relationship can be obtained by measuring the air conditioner in a dry environment. After determining the first temperature on the air inlet side of the air conditioner, the temperature difference (second temperature difference) corresponding to the first temperature and representing the dry environment can be determined according to the second corresponding relationship.

[0159] See also Fig.16 As shown, for any first temperature, the first temperature difference corresponding to the first temperature is smaller than the second temperature difference corresponding to the first temperature.

[0160] Above Fig.16 This is merely an exemplary description of the first corresponding relationship and the second corresponding relationship, and the present embodiment is not limited thereto.

[0161] The following is a specific example to illustrate the process of fan control in air conditioning:

[0162] After the air conditioner is turned on for refrigeration, the first temperature and the second temperature are detected, and the current temperature difference between the first temperature and the second temperature is calculated;

[0163] According to the preset first corresponding relationship, a first temperature difference corresponding to the first temperature and representing a humid environment is determined (when the air conditioner is just turned on, the fan speed is the second speed corresponding to the user-set gear of the air conditioner, so the process of increasing the fan speed of the air conditioner is not involved), and the current temperature difference is compared with the first temperature difference;

[0164] If the current temperature difference is greater than the first temperature difference, the fan speed will not be adjusted; if the current temperature difference is less than or equal to the first temperature difference, the fan speed will be controlled to decrease by one gear (when the machine is just turned on, the fan speed is the second speed, so the current fan speed is greater than the first speed);

[0165] At every preset time interval, continue to detect the first temperature and the second temperature, and calculate the current temperature difference between the first temperature and the second temperature at this time;

[0166] According to a preset first corresponding relationship, determining a first temperature difference corresponding to the first temperature and representing a humid environment; and according to a preset second corresponding relationship, determining a second temperature difference corresponding to the first temperature and representing a dry environment;

[0167] If the current temperature difference is ≤ the first temperature difference, and the current speed of the fan is greater than the first speed, the fan speed is controlled to decrease by one level; if the current temperature difference is ≤ the first temperature difference, and the current speed of the fan is not greater than the first speed, the fan speed is not adjusted; if the first temperature difference is < the current temperature difference < the second temperature difference, the fan speed is not adjusted; if the current temperature difference is ≥ the second temperature difference, and the current speed of the fan is less than the second speed, the fan speed is controlled to increase by one level; if the current temperature difference is ≥ the second temperature difference, and the current speed of the fan is not less than the second speed, the fan speed is not adjusted.

[0168] The above example is only an illustration of the fan control process, and the present embodiment is not limited thereto.

[0169] like Fig.17 As shown, based on the same inventive concept, the embodiment of the present application provides a first air conditioner fan control device 1700, comprising:

[0170] The temperature difference determination module 1701 is used to determine the current temperature difference between the first temperature at the air inlet side of the air conditioner and the second temperature at the outlet of the indoor heat exchanger;

[0171] The speed adjustment module 1702 is used to adjust the speed of the fan in the air conditioner if the current temperature difference is within the first temperature range or the second temperature range; wherein the first temperature range is a temperature range less than or equal to the first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to the second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; and the first temperature difference and the second temperature difference are determined based on the first temperature.

[0172] In some optional implementations, the speed adjustment module 1702 is specifically used to:

[0173] If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or

[0174] If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

[0175] In some optional implementations, the first temperature difference is determined by:

[0176] Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment;

[0177] The second temperature difference is determined by:

[0178] According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

[0179] See also Fig.18 As shown, in some optional implementations, the embodiment of the present application provides a second air conditioner fan control device 1800, which, based on the above-mentioned air conditioner fan control device 1700, further includes a first speed comparison module 1703, which is used to:

[0180] Before the speed adjustment module 1702 reduces the speed of the fan in the air conditioner, it is determined that the current speed of the fan is greater than a first speed; wherein the first speed is the fan speed corresponding to the lowest working gear of the air conditioner.

[0181] See also Fig.19 As shown, in some optional implementations, the present application embodiment provides a third air conditioner fan control device 1900, which, based on the above-mentioned air conditioner fan control device 1700, further includes a second speed comparison module 1704 for:

[0182] Before the speed adjustment module 1702 increases the speed of the fan in the air conditioner, it is determined that the current speed of the fan is less than a second speed; wherein the second speed is the fan speed corresponding to the user-set gear position of the air conditioner.

[0183] Since the device is the device in the method in the embodiment of the present application, and the principle of solving the problem by the device is similar to that of the method, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0184] like Fig. 20 As shown, based on the same inventive concept, an embodiment of the present application provides a controller 2000, including: a processor 2001 and a memory 2002;

[0185] The memory 2002 may be a volatile memory, such as a random-access memory (RAM); the memory 2002 may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); or the memory 2002 may be 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 2002 may be a combination of the above memories.

[0186] The processor 2001 may include one or more central processing units (CPU), graphics processing units (GPU) or digital processing units, etc.

[0187] The specific connection medium between the memory 2002 and the processor 2001 is not limited in the embodiment of the present application. Fig. 20 In the embodiment, the memory 2002 and the processor 2001 are connected via a bus 2003. The bus 2003 is Fig. 20 In the figure, the bus 2003 is shown by a bold line, and can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 20 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0188] The memory 2002 stores program codes. When the program codes are executed by the processor 2001, the processor 2001 performs the following process:

[0189] Determining a current temperature difference between a first temperature at an air inlet side of the air conditioner and a second temperature at an outlet of the indoor heat exchanger;

[0190] If the current temperature difference is within the first temperature range or within the second temperature range, the speed of the fan in the air conditioner is adjusted; wherein the first temperature range is a temperature range less than or equal to the first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to the second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

[0191] In some optional implementation manners, the processor 2001 specifically performs:

[0192] If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or

[0193] If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

[0194] In some optional implementations, before reducing the rotation speed of the fan in the air conditioner, the processor 2001 further executes:

[0195] Determine that the current rotation speed of the fan is greater than a first rotation speed; wherein the first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

[0196] In some optional implementations, before increasing the speed of the fan in the air conditioner, the processor 2001 further executes:

[0197] Determine that the current rotation speed of the fan is less than a second rotation speed; wherein the second rotation speed is the fan rotation speed corresponding to the user-set gear position of the air conditioner.

[0198] In some optional implementations, the first temperature difference is determined by:

[0199] Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment;

[0200] The second temperature difference is determined by:

[0201] According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

[0202] Since the controller is the controller that executes the method in the embodiment of the present application, and the principle of solving the problem by the controller is similar to that of the method, the implementation of the controller can refer to the implementation of the method, and the repeated parts will not be repeated.

[0203] The embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned air conditioner fan control method are implemented. The readable storage medium may be a non-volatile readable storage medium.

[0204] The present application is described above with reference to the block diagrams and / or flow charts showing the methods, devices (systems) and / or computer program products according to the embodiments of the present application. It should be understood that a block of the block diagram and / or flow chart diagram and a combination of blocks of the block diagram and / or flow chart diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor and / or other programmable device of a general-purpose computer, a special-purpose computer, to produce a machine, so that the instructions executed by the computer processor and / or other programmable device create a method for implementing the functions / actions specified in the block diagram and / or flow chart block.

[0205] Accordingly, the present application may also be implemented with hardware and / or software (including firmware, resident software, microcode, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium, for use by an instruction execution system or in conjunction with an instruction execution system. In the context of the present application, a computer-usable or computer-readable medium may be any medium that may contain, store, communicate, transmit, or convey a program for use by an instruction execution system, device, or apparatus, or in conjunction with an instruction execution system, device, or apparatus.

[0206] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0207] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling a fan in an air conditioner, characterized in that: The method comprises: Determine the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; wherein the second temperature is the temperature of the refrigerant after passing through the indoor heat exchanger; If the current temperature difference is within the first temperature range or within the second temperature range, the speed of the fan in the air conditioner is adjusted; wherein the first temperature range is a temperature range less than or equal to the first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to the second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

2. The method according to claim 1, characterized in that If the current temperature difference is within the first temperature range or within the second temperature range, adjusting the speed of the fan in the air conditioner includes: If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

3. The method according to claim 2, characterized in that Before reducing the rotation speed of the fan in the air conditioner, the method further includes: Determine that the current rotation speed of the fan is greater than a first rotation speed; wherein the first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

4. The method according to claim 2, characterized in that: Before increasing the rotation speed of the fan in the air conditioner, the method further includes: Determine that the current rotation speed of the fan is less than a second rotation speed; wherein the second rotation speed is the fan rotation speed corresponding to the user-set gear position of the air conditioner.

5. The method according to any one of claims 1 to 4, characterized in that: The first temperature difference is determined by: Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment; The second temperature difference is determined by: According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

6. An air conditioner, characterized in that: The air conditioner comprises a controller, a fan, an indoor heat exchanger, a first temperature measuring device arranged at the indoor air inlet side of the air conditioner, and a second temperature measuring device arranged at the outlet of the indoor heat exchanger, wherein: The fan is used to perform heat exchange on the indoor heat exchanger by wind power; The indoor heat exchanger is used to cool the gas; The first temperature measuring device is used to collect a first temperature on the air inlet side; The second temperature measuring device is used to collect the second temperature at the outlet of the indoor heat exchanger; wherein the second temperature is the temperature of the refrigerant after passing through the indoor heat exchanger; The controller is used to: Determine the current temperature difference between a first temperature on the air inlet side of the air conditioner and a second temperature at the outlet of the indoor heat exchanger; if the current temperature difference is within the first temperature range or within the second temperature range, adjust the speed of the fan in the air conditioner; wherein the first temperature range is a temperature range less than or equal to a first temperature difference representing a humid environment, and the second temperature range is a temperature range greater than or equal to a second temperature difference representing a dry environment; the first temperature difference is less than the second temperature difference; the first temperature difference and the second temperature difference are determined based on the first temperature.

7. The air conditioner according to claim 6, characterized in that: The controller is specifically used for: If the current temperature difference is within the first temperature range, reducing the speed of the fan in the air conditioner; or If the current temperature difference is within the second temperature range, the rotation speed of the fan in the air conditioner is increased.

8. The air conditioner according to claim 7, characterized in that: Before reducing the speed of the fan in the air conditioner, the controller is further used to: Determine that the current rotation speed of the fan is greater than a first rotation speed; wherein the first rotation speed is the fan rotation speed corresponding to the lowest working gear of the air conditioner.

9. The air conditioner according to claim 7, characterized in that: Before increasing the speed of the fan in the air conditioner, the controller is further used to: Determine that the current rotation speed of the fan is less than a second rotation speed; wherein the second rotation speed is the fan rotation speed corresponding to the user-set gear position of the air conditioner.

10. The air conditioner according to any one of claims 6 to 9, characterized in that: The first temperature difference is determined by: Determine a first temperature difference corresponding to the first temperature according to a preset first corresponding relationship; wherein the first corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a humid environment; The second temperature difference is determined by: According to a preset second corresponding relationship, a second temperature difference corresponding to the first temperature is determined; wherein the second corresponding relationship includes a corresponding relationship between a preset temperature of the air inlet side and a temperature difference representing a dry environment.

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