Air conditioner control method, device, air conditioner and storage medium

Abstract

The present invention discloses an air conditioner control method, device, air conditioner, and storage medium, belonging to the technical field of air conditioners. The method comprises: determining a temperature difference based on a current indoor ambient temperature and a user-set temperature; determining a maintenance time based on the temperature difference; when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, adjusting the fan speed of the indoor fan according to a first preset coefficient to obtain an adjusted fan speed; and controlling the operation of the air conditioner based on the adjusted fan speed and the maintenance time. The present invention calculates the maintenance time based on the temperature difference and adjusts the fan speed of the indoor fan in combination with the maintenance time. This can avoid return air short circuits that cause system load increases, leading to temperature-reaching shutdowns or evaporator high-temperature shutdowns, thereby avoiding frequent shutdowns and improving system stability and user comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method and device, an air conditioner, and a storage medium. Background Art

[0002] In automatic wind mode, as the room temperature rises, the indoor fan speed decreases, and can drop to as low as 1%. At this time, the system load is large, and the load will be adjusted by reducing the frequency and outdoor unit speed through T2 pipe temperature judgment.

[0003] However, under overload heating conditions, due to the high system load, the frequency drops too low under this condition, which can easily cause the compressor to stall and lead to abnormal shutdown. In automatic wind mode, as the room temperature rises, the air outlet speed decreases, and the minimum drops to 1%, which will cause hot air to float upward, thereby causing a return air short circuit, increasing the system load, and causing temperature shutdown or evaporator high temperature prevention shutdown. Frequent shutdowns will affect consumer comfort. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air conditioner control method, device, air conditioner and storage medium, aiming to solve the technical problem of how to avoid shutdown caused by return air short circuit.

[0005] To achieve the above object, the present invention provides a method for controlling an air conditioner, wherein the air conditioner includes an evaporator and an indoor fan, wherein the evaporator is arranged outdoors and the indoor fan is arranged indoors, and the method for controlling the air conditioner includes:

[0006] Determine the temperature difference based on the current indoor ambient temperature and the user-set temperature;

[0007] Determining the holding time according to the temperature difference;

[0008] When the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, adjusting the fan speed of the indoor fan according to a first preset coefficient to obtain an adjusted fan speed;

[0009] The operation of the air conditioner is controlled according to the adjusted fan speed and the maintenance time.

[0010] Optionally, controlling the operation of the air conditioner according to the adjusted fan speed and the maintenance time includes:

[0011] When the operating time of the air conditioner at the adjusted fan speed reaches the maintenance time, determining whether the current evaporator pipe temperature is greater than the first preset temperature threshold;

[0012] When the current evaporator tube temperature is less than or equal to the first preset temperature threshold, the process returns to the step of adjusting the fan speed of the indoor fan according to the first preset coefficient.

[0013] Optionally, after determining whether the current evaporator tube temperature is greater than the first preset temperature threshold, the method further includes:

[0014] When the current evaporator tube temperature is greater than the first preset temperature threshold, the process returns to the step of determining the maintenance time according to the temperature difference.

[0015] Optionally, after determining the holding time according to the temperature difference, the method further includes:

[0016] When the current evaporator tube temperature is greater than or equal to the first preset temperature threshold, determining whether the current evaporator tube temperature is greater than a second preset temperature threshold, and the second preset temperature threshold is greater than the first preset temperature threshold;

[0017] When the current evaporator tube temperature is greater than the second preset temperature threshold, adjusting the fan speed of the indoor fan according to a second preset coefficient to obtain an adjusted fan speed;

[0018] When the air conditioner is operated at the adjusted fan speed for a time period that reaches the maintenance time period, determining whether the current evaporator tube temperature is less than the second preset temperature threshold;

[0019] When the current evaporator tube temperature is greater than or equal to the second preset temperature threshold, the process returns to executing the step of adjusting the fan speed of the indoor fan according to the second preset coefficient.

[0020] Optionally, after determining whether the current evaporator tube temperature is less than the second preset temperature threshold, the method further includes:

[0021] When the current evaporator tube temperature is lower than the second preset temperature threshold, the process returns to the step of determining the maintenance time according to the temperature difference.

[0022] Optionally, the air conditioner further comprises a compressor, and the compressor is arranged outdoors;

[0023] After determining the temperature difference according to the current indoor ambient temperature and the user set temperature, the method further includes:

[0024] The compressor frequency of the compressor is adjusted according to the temperature difference, so that the current evaporator tube temperature of the evaporator changes with the change of the compressor frequency.

[0025] Optionally, determining the maintenance time according to the temperature difference includes:

[0026] Finding a target temperature range corresponding to the temperature difference;

[0027] Obtaining a time value corresponding to the target temperature range;

[0028] The holding time is determined according to the time value.

[0029] In addition, to achieve the above-mentioned object, the present invention further provides an air conditioner control device, the air conditioner control device comprising:

[0030] An information acquisition module is used to determine the temperature difference between the current indoor ambient temperature and the user-set temperature;

[0031] A time determination module, configured to determine a maintenance time according to the temperature difference;

[0032] a fan adjustment module, configured to adjust the fan speed of the indoor fan according to a first preset coefficient when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, to obtain an adjusted fan speed;

[0033] An air conditioning control module is used to control the operation of the air conditioner according to the adjusted fan speed and the maintenance time.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also proposes an air conditioner, which includes an evaporator and an indoor fan, the evaporator is arranged outdoors, and the indoor fan is arranged indoors. The air conditioner also includes: a memory, a processor, and an air conditioner control program stored on the memory and capable of running on the processor. When the air conditioner control program is executed by the processor, the air conditioner control method as described above is implemented.

[0035] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the air conditioner control method described above is implemented.

[0036] In the air conditioner control method proposed in the present invention, a temperature difference is determined based on the current indoor ambient temperature and a user-set temperature; a maintenance time is determined based on the temperature difference; when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, the fan speed of the indoor fan is adjusted based on a first preset coefficient to obtain an adjusted fan speed; and the air conditioner operation is controlled based on the adjusted fan speed and the maintenance time. By calculating the maintenance time based on the temperature difference and adjusting the fan speed of the indoor fan in conjunction with the maintenance time, the present invention can prevent return air short circuits from causing increased system load, which could lead to temperature-reaching shutdowns or evaporator high-temperature shutdowns, thereby avoiding frequent shutdowns and improving system stability and user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the structure of an air conditioner in the hardware operating environment involved in the embodiment of the present invention;

[0038] Figure 2 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention;

[0039] Figure 3 A schematic diagram of a system device according to an embodiment of an air conditioner control method of the present invention;

[0040] Figure 4 A control logic diagram of an embodiment of an air conditioner control method of the present invention;

[0041] Figure 5 1. It is a flow chart of a second embodiment of the air conditioner control method of the present invention;

[0042] Figure 6 FIG. 1 is a functional module diagram of a first embodiment of an air conditioner control device according to the present invention.

[0043] Description of Figure Numbers:

[0044] Label name Label name 100 compressor 200 Four-way valve 300 Condenser 400 evaporator 500 Indoor fan 600 Outdoor fan 700 Electronic expansion valve

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] Reference Figure 1 , Figure 1 This is a schematic diagram of the air conditioner structure of the hardware operating environment involved in the embodiment of the present invention.

[0048] like Figure 1As shown, the air conditioner includes an evaporator and an indoor fan, the evaporator is arranged outdoors, and the indoor fan is arranged indoors. The air conditioner may also include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a button, and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable memory (non-volatile memory), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The equipment structure shown in the figure does not constitute a limitation on the air conditioner, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0050] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module and an air conditioner control program.

[0051] exist Figure 1 In the air conditioner shown, the network interface 1004 is mainly used to connect to the external network and communicate data with other network devices; the user interface 1003 is mainly used to connect to the user device and communicate data with the user device; the device of the present invention calls the air conditioner control program stored in the memory 1005 through the processor 1001, and executes the air conditioner control method provided by the embodiment of the present invention.

[0052] Based on the above hardware structure, an embodiment of the air conditioner control method of the present invention is proposed.

[0053] Reference Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention.

[0054] In a first embodiment, the air conditioner includes an evaporator and an indoor fan, the evaporator is arranged outdoors, and the indoor fan is arranged indoors. The air conditioner control method includes:

[0055] Step S10: determining a temperature difference based on the current indoor ambient temperature and the user set temperature.

[0056] It should be noted that the execution subject of this embodiment can be the control device of the air conditioner, or other devices that can achieve the same or similar functions. This embodiment does not limit this. In this embodiment, the control device of the air conditioner is used as an example for explanation.

[0057] It should be noted that the air conditioner in this embodiment may include, but is not limited to, various types or models of air conditioners, such as wall-mounted air conditioners, cabinet air conditioners, and central air conditioners, and this embodiment does not limit this. The user-set temperature in this embodiment may be a desired temperature set by the user on the air conditioner. The user may adjust the user-set temperature during use of the air conditioner using the air conditioner remote control or air conditioner control panel, and this embodiment does not limit this.

[0058] It should be understood that Figure 3 As shown, Figure 3 The diagram of the system device is shown in FIG. 1 . The air conditioner in this embodiment may include an indoor unit and an outdoor unit. The indoor unit is located indoors, and the outdoor unit is located outdoors. The indoor unit includes an indoor fan 500 and a condenser 300, and the outdoor unit includes a compressor 100, a four-way valve 200, an evaporator 400, an outdoor fan 600, and an electronic expansion valve 700. Figure 3 In addition to the components shown in the figure, the air conditioner in this embodiment may also include more other components, which are not limited in this embodiment.

[0059] It should be noted that this solution is mainly used in heating mode and automatic wind mode. Therefore, the control logic in this embodiment is executed only when the air conditioner is running in automatic wind heating mode. Figure 4 As shown, Figure 4 It is a control logic diagram.

[0060] It is understandable that when it is detected that the air conditioner is turned on and running in automatic wind mode for heating, the current indoor ambient temperature T1, the current evaporator pipe temperature T2, the fan speed L of the indoor fan and the compressor operating frequency f can be read in real time.

[0061] It should be understood that after obtaining the current indoor ambient temperature T1 and the latest user-set temperature Ttg, the temperature difference C can be calculated based on the current indoor ambient temperature T1 and the user-set temperature Ttg. For example, in a specific implementation, the temperature difference C can be determined by calculating the difference between the current indoor ambient temperature T1 and the user-set temperature Ttg in the manner of C=Ttg-T1.

[0062] It should be understood that after obtaining the temperature difference C, the compressor operating frequency f can be adjusted according to the temperature difference C, so that the compressor operating frequency f changes and the current evaporator tube temperature T2 changes with the change of the compressor frequency.

[0063] In a specific implementation, the frequency adjustment rule in this embodiment may be consistent with the existing rule, that is, as the temperature difference C decreases, the compressor operating frequency f also decreases, and this embodiment does not impose any limitation on this.

[0064] Step S20: determining a maintenance time according to the temperature difference.

[0065] It should be noted that, in order to achieve a better control effect, in this embodiment, the holding time can be recalculated based on the temperature difference during each cycle. Corresponding time values ​​can be pre-set for different temperature ranges. After determining the current temperature difference, the holding time can be determined by searching for the corresponding time value based on the target temperature range corresponding to the current temperature difference. This embodiment does not impose any limitation on this.

[0066] Step S30 , when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, adjusting the fan speed of the indoor fan according to a first preset coefficient to obtain an adjusted fan speed.

[0067] It should be noted that the evaporator tube temperature in this embodiment may be the coil temperature of the evaporator, and this embodiment does not impose any limitation on this.

[0068] It should be noted that the first preset temperature threshold K1 and the second preset temperature threshold K2 can be pre-set according to actual conditions, wherein the second preset temperature threshold K2 is greater than the first preset temperature threshold K1. K1 and K2 can be adjusted according to different models. In this embodiment, K1 is 40 and K2 is 48 as an example for illustration.

[0069] In a specific implementation, in addition to setting a fixed first preset temperature threshold K1 and a second preset temperature threshold K2, the settings of K1 and K2 can also be adjusted according to the current indoor ambient temperature T1. For example, the first value N1 and the second value N2 can be set so that K1 = T1 + N1, K2 = T1 + N2, thereby dynamically determining the first preset temperature threshold K1 by the first value N1 and the current indoor ambient temperature T1, and dynamically determining the second preset temperature threshold K2 by the second value N2 and the current indoor ambient temperature T2. This embodiment does not impose any restrictions on this.

[0070] It should be understood that as the temperature difference C decreases, the compressor operating frequency f gradually decreases, and the evaporator tube temperature T2 also gradually decreases. When T2 drops to K1, the indoor fan speed is adjusted.

[0071] It can be understood that the current evaporator tube temperature T2 can be compared with the first preset temperature threshold K1 to determine whether the current evaporator tube temperature T2 is less than the first preset temperature threshold K1, and when the current evaporator tube temperature T2 is less than the first preset temperature threshold K1, the indoor fan speed is adjusted according to the first preset coefficient.

[0072] It should be noted that the first preset coefficient in this embodiment can be adjusted according to the difference in maximum speed of different models. In this embodiment, the maximum value of L is 1100 rpm, so the first preset coefficient can be set to 0.9, and this embodiment does not impose any restrictions on this.

[0073] It is understandable that the fan speed can be adjusted by multiplying the first preset coefficient by the fan speed of the indoor fan. For example, the fan speed can be adjusted according to L=0.9*L, that is, the adjusted speed is the speed before adjustment*0.9.

[0074] Step S40: Controlling the operation of the air conditioner according to the adjusted fan speed and the maintenance time.

[0075] It should be noted that the air conditioner can be controlled according to the adjusted fan speed, and the operating time of the air conditioner at the adjusted fan speed is recorded. When the operating time reaches the maintenance time, it is determined whether the current evaporator tube temperature T2 is greater than the first preset temperature threshold K1. If T2>K1, the speed is no longer adjusted, and the process returns to the step of determining the maintenance time based on the temperature difference until the next time T2<K1, at which point the speed is adjusted again. If T2≤K1, the process returns to the step of adjusting the fan speed of the indoor fan according to the first preset coefficient, and the speed is continued to be adjusted according to the method of L=0.9*L.

[0076] It should be understood that in automatic wind mode, when the indoor load increases due to changes in ambient temperature, the evaporator tube temperature T2 will also rise. When T2 rises to K2, that is, if the current evaporator tube temperature T2 is greater than or equal to the first preset temperature threshold K1, it can also be determined whether the current evaporator tube temperature T2 is greater than the second preset temperature threshold K2. If the current evaporator tube temperature T2 is greater than K2, the indoor fan speed is adjusted according to the second preset coefficient.

[0077] It should be noted that the second preset coefficient in this embodiment can be adjusted according to the difference in maximum speed of different models. In this embodiment, the maximum value of L is 1100 rpm, so the second preset coefficient can be set to 100. This embodiment does not limit this.

[0078] It is understandable that the fan speed can be adjusted by adding the second preset coefficient to the fan speed of the indoor fan. For example, the fan speed can be adjusted according to L=L+100, that is, the speed after adjustment is the speed before adjustment + 100.

[0079] It should be noted that the air conditioner can be controlled according to the adjusted fan speed, and the operating time of the air conditioner at the adjusted fan speed is recorded. When the operating time reaches the maintenance time, it is determined whether the current evaporator tube temperature T2 is less than the second preset temperature threshold K2. If T2 < K2, the speed is no longer adjusted, and the process returns to the step of determining the maintenance time based on the temperature difference until the next time T2 < K1, at which point the speed is adjusted again. If T2 ≥ K2, the process returns to the step of adjusting the fan speed of the indoor fan according to the second preset coefficient, and the speed is continued to be adjusted in the manner of L = L + 100.

[0080] It should be understood that if the current evaporator tube temperature T2 is greater than or equal to the first preset temperature threshold K1 and less than or equal to the second preset temperature threshold K2, the process returns to the step of determining the maintenance time based on the temperature difference, and then continues with the temperature comparison step until T2 < K1 or T2 > K2 occurs, and then different speed control strategies are implemented respectively.

[0081] It is understood that this solution improves upon the technical deficiencies of the existing automatic air heating mode. The control logic of this solution can achieve the following beneficial effects: 1. In automatic air mode, the system operates at the highest speed until the evaporator tube temperature T2 drops to K1, fully agitating the indoor air and improving room temperature uniformity, thereby reducing the difference between the outlet air temperature and the surrounding room temperature and improving the heating pressure effect. 2. During the process of decreasing the indoor fan speed, the system multiplies the speed by a coefficient. This adjustment method allows for rapid initial adjustments, and as the room temperature approaches the set temperature, the adjustment amplitude decreases, which is beneficial to the stability of the adjustment. Furthermore, the system stipulates that the speed is only reduced when the evaporator tube temperature T2 is less than K1, which is beneficial to sufficient heat exchange of the indoor evaporator and improves energy saving. At the same time, when the compressor is running at a low frequency, the system load is maintained at an appropriate level, which helps prevent excessive load from causing evaporator high temperature shutdown protection / compressor stall, thereby improving system operation stability.

[0082] In this embodiment, a temperature difference is determined based on the current indoor ambient temperature and the user-set temperature; a holding time is determined based on the temperature difference; when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, the fan speed of the indoor fan is adjusted according to a first preset coefficient to obtain an adjusted fan speed; and the air conditioner operation is controlled based on the adjusted fan speed and the holding time. This solution calculates the holding time based on the temperature difference and adjusts the fan speed of the indoor fan in conjunction with the holding time. This solution can prevent return air short circuits from causing increased system load, which could lead to temperature-sensitive shutdowns or evaporator high-temperature shutdowns, thereby avoiding frequent shutdowns and improving system stability and user comfort.

[0083] In one embodiment, if Figure 5 As shown, a second embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment, wherein the air conditioner further comprises a compressor, and the compressor is arranged outdoors;

[0084] The step S20 includes:

[0085] Step S201 , searching for a target temperature range corresponding to the temperature difference.

[0086] Table 1 Correspondence between temperature range and time

[0087] C=Ttg-T1 Tc C＜1.5 150 1.5≤C＜3 120 C≥3 90

[0088] It should be noted that Table 1 is a table of correspondence between temperature range and time. Corresponding temperature ranges can be set in advance for different temperature differences. For example, the first temperature range can be set to C<1.5, the second temperature range can be set to 1.5≤C<3, and the third temperature range can be set to C≥3. This embodiment does not impose any restrictions on this.

[0089] It should be noted that after setting the temperature range, you can also set a corresponding time value for each temperature range. For example, the time value corresponding to the first time range is set to 150, the time value corresponding to the second time range is set to 120, and the time value corresponding to the third time range is set to 90. This embodiment does not limit this.

[0090] It can be understood that after determining the current temperature difference, the target temperature range corresponding to the temperature difference can be found in Table 1. For example, if the current temperature difference is 2, the target temperature range corresponding to the current temperature difference can be determined as the second temperature range according to Table 1.

[0091] Step S202: Obtain the time value corresponding to the target temperature range.

[0092] It should be understood that after determining the target temperature range in the above manner, the time value corresponding to the target temperature range can also be found according to Table 1. For example, if the target temperature range is the second temperature range, the time value corresponding to the target temperature range is 120.

[0093] Step S203: determining the maintenance time according to the time value.

[0094] It should be understood that in this embodiment, the maintenance time can be determined based on the time value corresponding to the target temperature range, so that under different temperature differences, an appropriate maintenance time can be selected for subsequent indoor fan speed adjustment to achieve better adjustment effect.

[0095] In this embodiment, the target temperature range corresponding to the temperature difference is found, the time value corresponding to the target temperature range is obtained, and the maintenance time is determined according to the time value. Therefore, the maintenance time can be accurately determined according to the target temperature range corresponding to the temperature difference, thereby improving the indoor fan speed adjustment effect.

[0096] In addition, an embodiment of the present invention further provides a storage medium on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0097] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0098] In addition, refer to Figure 6 The embodiment of the present invention further provides an air conditioner control device, the air conditioner control device comprising:

[0099] The information acquisition module 10 is used to determine the temperature difference according to the current indoor ambient temperature and the user set temperature.

[0100] It should be noted that the air conditioner in this embodiment may include, but is not limited to, various types or models of air conditioners, such as wall-mounted air conditioners, cabinet air conditioners, and central air conditioners, and this embodiment does not limit this. The user-set temperature in this embodiment may be a desired temperature set by the user on the air conditioner. The user may adjust the user-set temperature during use of the air conditioner using the air conditioner remote control or air conditioner control panel, and this embodiment does not limit this.

[0101] It should be understood that Figure 3 As shown, Figure 3The diagram of the system device is shown in FIG. 1 . The air conditioner in this embodiment may include an indoor unit and an outdoor unit. The indoor unit is located indoors, and the outdoor unit is located outdoors. The indoor unit includes an indoor fan 500 and a condenser 300, and the outdoor unit includes a compressor 100, a four-way valve 200, an evaporator 400, an outdoor fan 600, and an electronic expansion valve 700. Figure 3 In addition to the components shown in the figure, the air conditioner in this embodiment may also include more other components, which are not limited in this embodiment.

[0102] It should be noted that this solution is mainly used in heating mode and automatic wind mode. Therefore, the control logic in this embodiment is executed only when the air conditioner is running in automatic wind heating mode. Figure 4 As shown, Figure 4 It is a control logic diagram.

[0103] It is understandable that when it is detected that the air conditioner is turned on and running in automatic wind mode for heating, the current indoor ambient temperature T1, the current evaporator pipe temperature T2, the fan speed L of the indoor fan and the compressor operating frequency f can be read in real time.

[0104] It should be understood that after obtaining the current indoor ambient temperature T1 and the latest user-set temperature Ttg, the temperature difference C can be calculated based on the current indoor ambient temperature T1 and the user-set temperature Ttg. For example, in a specific implementation, the temperature difference C can be determined by calculating the difference between the current indoor ambient temperature T1 and the user-set temperature Ttg in the manner of C=Ttg-T1.

[0105] It should be understood that after obtaining the temperature difference C, the compressor operating frequency f can be adjusted according to the temperature difference C, so that the compressor operating frequency f changes and the current evaporator tube temperature T2 changes with the change of the compressor frequency.

[0106] In a specific implementation, the frequency adjustment rule in this embodiment may be consistent with the existing rule, that is, as the temperature difference C decreases, the compressor operating frequency f also decreases, and this embodiment does not impose any limitation on this.

[0107] The time determination module 20 is configured to determine the maintenance time according to the temperature difference.

[0108] It should be noted that, in order to achieve a better control effect, in this embodiment, the holding time can be recalculated based on the temperature difference during each cycle. Corresponding time values ​​can be pre-set for different temperature ranges. After determining the current temperature difference, the holding time can be determined by searching for the corresponding time value based on the target temperature range corresponding to the current temperature difference. This embodiment does not impose any limitation on this.

[0109] The fan adjustment module 30 is configured to adjust the fan speed of the indoor fan according to a first preset coefficient to obtain an adjusted fan speed when the current evaporator tube temperature of the evaporator is lower than a first preset temperature threshold.

[0110] It should be noted that the evaporator tube temperature in this embodiment may be the coil temperature of the evaporator, and this embodiment does not impose any limitation on this.

[0111] It should be noted that the first preset temperature threshold K1 and the second preset temperature threshold K2 can be pre-set according to actual conditions, wherein the second preset temperature threshold K2 is greater than the first preset temperature threshold K1. K1 and K2 can be adjusted according to different models. In this embodiment, K1 is 40 and K2 is 48 as an example for illustration.

[0112] In a specific implementation, in addition to setting a fixed first preset temperature threshold K1 and a second preset temperature threshold K2, the settings of K1 and K2 can also be adjusted according to the current indoor ambient temperature T1. For example, the first value N1 and the second value N2 can be set so that K1 = T1 + N1, K2 = T1 + N2, thereby dynamically determining the first preset temperature threshold K1 by the first value N1 and the current indoor ambient temperature T1, and dynamically determining the second preset temperature threshold K2 by the second value N2 and the current indoor ambient temperature T2. This embodiment does not impose any restrictions on this.

[0113] It should be understood that as the temperature difference C decreases, the compressor operating frequency f gradually decreases, and the evaporator tube temperature T2 also gradually decreases. When T2 drops to K1, the indoor fan speed is adjusted.

[0114] It can be understood that the current evaporator tube temperature T2 can be compared with the first preset temperature threshold K1 to determine whether the current evaporator tube temperature T2 is less than the first preset temperature threshold K1, and when the current evaporator tube temperature T2 is less than the first preset temperature threshold K1, the indoor fan speed is adjusted according to the first preset coefficient.

[0115] It should be noted that the first preset coefficient in this embodiment can be adjusted according to the difference in maximum speed of different models. In this embodiment, the maximum value of L is 1100 rpm, so the first preset coefficient can be set to 0.9, and this embodiment does not impose any restrictions on this.

[0116] It is understandable that the fan speed can be adjusted by multiplying the first preset coefficient by the fan speed of the indoor fan. For example, the fan speed can be adjusted according to L=0.9*L, that is, the adjusted speed is the speed before adjustment*0.9.

[0117] The air conditioning control module 40 is used to control the operation of the air conditioner according to the adjusted fan speed and the maintenance time.

[0118] It should be noted that the air conditioner can be controlled according to the adjusted fan speed, and the operating time of the air conditioner at the adjusted fan speed is recorded. When the operating time reaches the maintenance time, it is determined whether the current evaporator tube temperature T2 is greater than the first preset temperature threshold K1. If T2>K1, the speed is no longer adjusted, and the process returns to the step of determining the maintenance time based on the temperature difference until the next time T2<K1, at which point the speed is adjusted again. If T2≤K1, the process returns to the step of adjusting the fan speed of the indoor fan according to the first preset coefficient, and the speed is continued to be adjusted according to the method of L=0.9*L.

[0119] It should be understood that in automatic wind mode, when the indoor load increases due to changes in ambient temperature, the evaporator tube temperature T2 will also rise. When T2 rises to K2, that is, if the current evaporator tube temperature T2 is greater than or equal to the first preset temperature threshold K1, it can also be determined whether the current evaporator tube temperature T2 is greater than the second preset temperature threshold K2. If the current evaporator tube temperature T2 is greater than K2, the indoor fan speed is adjusted according to the second preset coefficient.

[0120] It should be noted that the second preset coefficient in this embodiment can be adjusted according to the difference in maximum speed of different models. In this embodiment, the maximum value of L is 1100 rpm, so the second preset coefficient can be set to 100. This embodiment does not limit this.

[0121] It is understandable that the fan speed can be adjusted by adding the second preset coefficient to the fan speed of the indoor fan. For example, the fan speed can be adjusted according to L=L+100, that is, the speed after adjustment is the speed before adjustment + 100.

[0122] It should be noted that the air conditioner can be controlled according to the adjusted fan speed, and the operating time of the air conditioner at the adjusted fan speed is recorded. When the operating time reaches the maintenance time, it is determined whether the current evaporator tube temperature T2 is less than the second preset temperature threshold K2. If T2 < K2, the speed is no longer adjusted, and the process returns to the step of determining the maintenance time based on the temperature difference until the next time T2 < K1, at which point the speed is adjusted again. If T2 ≥ K2, the process returns to the step of adjusting the fan speed of the indoor fan according to the second preset coefficient, and the speed is continued to be adjusted in the manner of L = L + 100.

[0123] It should be understood that if the current evaporator tube temperature T2 is greater than or equal to the first preset temperature threshold K1 and less than or equal to the second preset temperature threshold K2, the process returns to the step of determining the maintenance time based on the temperature difference, and then continues with the temperature comparison step until T2 < K1 or T2 > K2 occurs, and then different speed control strategies are implemented respectively.

[0124] It is understood that this solution improves upon the technical deficiencies of the existing automatic air heating mode. The control logic of this solution can achieve the following beneficial effects: 1. In automatic air mode, the system operates at the highest speed until the evaporator tube temperature T2 drops to K1, fully agitating the indoor air and improving room temperature uniformity, thereby reducing the difference between the outlet air temperature and the surrounding room temperature and improving the heating pressure effect. 2. During the process of decreasing the indoor fan speed, the system multiplies the speed by a coefficient. This adjustment method allows for rapid initial adjustments, and as the room temperature approaches the set temperature, the adjustment amplitude decreases, which is beneficial to the stability of the adjustment. Furthermore, the system stipulates that the speed is only reduced when the evaporator tube temperature T2 is less than K1, which is beneficial to sufficient heat exchange of the indoor evaporator and improves energy saving. At the same time, when the compressor is running at a low frequency, the system load is maintained at an appropriate level, which helps prevent excessive load from causing evaporator high temperature shutdown protection / compressor stall, thereby improving system operation stability.

[0125] In this embodiment, a temperature difference is determined based on the current indoor ambient temperature and the user-set temperature; a holding time is determined based on the temperature difference; when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, the fan speed of the indoor fan is adjusted according to a first preset coefficient to obtain an adjusted fan speed; and the air conditioner operation is controlled based on the adjusted fan speed and the holding time. This solution calculates the holding time based on the temperature difference and adjusts the fan speed of the indoor fan in conjunction with the holding time. This solution can prevent return air short circuits from causing increased system load, which could lead to temperature-sensitive shutdowns or evaporator high-temperature shutdowns, thereby avoiding frequent shutdowns and improving system stability and user comfort.

[0126] For other embodiments or specific implementation methods of the air conditioner control device of the present invention, reference may be made to the above-mentioned method embodiments, which will not be described in detail here.

[0127] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0128] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0129] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling an intelligent device (which can be a mobile phone, computer, air conditioner, or network air conditioner, etc.) to execute the methods described in each embodiment of the present invention.

[0130] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes an evaporator and an indoor fan, the evaporator is arranged outdoors, and the indoor fan is arranged indoors. The air conditioner control method includes: Determine the temperature difference based on the current indoor ambient temperature and the user-set temperature; determining a holding time according to the temperature difference; When the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, adjusting the fan speed of the indoor fan by multiplying the coefficient according to a first preset coefficient to obtain an adjusted decreased fan speed; and When the operating time of the air conditioner at the adjusted fan speed reaches the maintenance time, determining whether the current evaporator pipe temperature is greater than the first preset temperature threshold; and When the current evaporator tube temperature is less than or equal to the first preset temperature threshold, the process returns to the step of adjusting the fan speed of the indoor fan by multiplying the fan speed by the first preset coefficient.

2. The air conditioner control method according to claim 1, wherein: After determining whether the current evaporator tube temperature is greater than the first preset temperature threshold, the method further includes: When the current evaporator tube temperature is greater than the first preset temperature threshold, the process returns to the step of determining the maintenance time according to the temperature difference.

3. The air conditioner control method according to claim 1, wherein: After determining the holding time according to the temperature difference, the method further includes: When the current evaporator tube temperature is greater than or equal to the first preset temperature threshold, determining whether the current evaporator tube temperature is greater than a second preset temperature threshold, and the second preset temperature threshold is greater than the first preset temperature threshold; When the current evaporator tube temperature is greater than the second preset temperature threshold, adjusting the fan speed of the indoor fan according to a second preset coefficient to obtain an adjusted fan speed; When the operating time of the air conditioner at the adjusted fan speed reaches the maintenance time, determining whether the current evaporator pipe temperature is less than the second preset temperature threshold; and When the current evaporator tube temperature is greater than or equal to the second preset temperature threshold, the process returns to executing the step of adjusting the fan speed of the indoor fan according to the second preset coefficient.

4. The air conditioner control method according to claim 3, wherein: After determining whether the current evaporator tube temperature is less than the second preset temperature threshold, the method further includes: When the current evaporator tube temperature is lower than the second preset temperature threshold, the process returns to the step of determining the maintenance time according to the temperature difference.

5. The air conditioner control method according to claim 1, wherein: The air conditioner further comprises a compressor, which is arranged outdoors; After determining the temperature difference according to the current indoor ambient temperature and the user set temperature, the method further includes: The compressor frequency of the compressor is adjusted according to the temperature difference, so that the current evaporator tube temperature of the evaporator changes with the change of the compressor frequency.

6. The air conditioner control method according to any one of claims 1 to 5, wherein: The determining of the holding time according to the temperature difference comprises: Finding a target temperature range corresponding to the temperature difference; Obtaining a time value corresponding to the target temperature range; and The holding time is determined according to the time value.

7. An air conditioner control device, characterized in that: The air conditioner includes an evaporator and an indoor fan, wherein the evaporator is arranged outdoors and the indoor fan is arranged indoors, and the air conditioner control device includes: An information acquisition module is used to determine the temperature difference between the current indoor ambient temperature and the user-set temperature; A time determination module, configured to determine a maintenance time according to the temperature difference; a fan adjustment module, configured to adjust the fan speed of the indoor fan by multiplying the fan speed by a first preset coefficient according to a first preset coefficient when the current evaporator tube temperature of the evaporator is less than a first preset temperature threshold, to obtain an adjusted reduced fan speed; and an air conditioning control module, configured to determine whether the current evaporator tube temperature is greater than the first preset temperature threshold when the operating time of the air conditioner at the adjusted fan speed reaches the maintenance time; and When the current evaporator tube temperature is less than or equal to the first preset temperature threshold, the process returns to the step of adjusting the fan speed of the indoor fan by multiplying the fan speed by the first preset coefficient.

8. An air conditioner, characterized in that: The air conditioner includes an evaporator and an indoor fan, the evaporator is arranged outdoors, and the indoor fan is arranged indoors. The air conditioner also includes: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor. When the air conditioner control program is executed by the processor, the air conditioner control method according to any one of claims 1 to 6 is implemented.

9. A storage medium, characterized in that: The storage medium stores an air conditioner control program, and when the air conditioner control program is executed by the processor, the air conditioner control method according to any one of claims 1 to 6 is implemented.

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