A control method, a control device and an air conditioner for an air conditioner

Abstract

The present invention provides a control method, a control device and an air conditioner for an air conditioner. The air conditioner is provided with a logic for preventing shutdown due to sudden change of set temperature. The control method includes: obtaining a new user-set temperature and the corresponding indoor environmental temperature, and obtaining an initial user-set temperature and the corresponding indoor environmental temperature; determining whether the initial user-set temperature and the corresponding indoor environmental temperature, and the new user-set temperature and the corresponding indoor environmental temperature meet a preset condition; if so, executing the logic for preventing shutdown due to sudden change of set temperature. By the control method of the present invention, the problem of shutdown caused by sudden change of the temperature of the air conditioner can be prevented. The room temperature can be smoothly transitioned, and the temperature fluctuation can be reduced, which can not only improve the comfort of the user during the use of the air conditioner, but also has the characteristics of energy saving.

Description

Technical Field

[0001] The present invention belongs to the field of air conditioners, and particularly relates to a control method, a control device and an air conditioner for an air conditioner. Background Art

[0002] With the improvement of people's living standards, air conditioners have become widely used household appliances. The existing air conditioner control methods all use the room temperature PID algorithm for control. PID control is based on the temperature difference between the room temperature and the set temperature, and given PID parameters are used to control the increase or decrease of the compressor frequency.

[0003] However, there is a situation that is likely to occur. After the user uses the air conditioner for a period of time, the temperature is adjusted upward. Since the room temperature has dropped to or close to the initial user-set temperature at this time, when the user adjusts the air conditioner set temperature upward again, due to the problem of the existing control algorithm, it is extremely easy to cause the air conditioner to stop at the temperature point. (This temperature point refers to the set temperature adjusted later).

[0004] For example: When the user sets 20°C, when the air conditioner reaches the set temperature, the user feels that the room temperature has dropped at this time and adjusts the temperature to 26°C. At this time, the set temperature is higher than the room temperature, and the air conditioner will stop at the temperature point. The sudden shutdown of the air conditioner will cause the room temperature to rise rapidly again. When the room temperature is higher than the set temperature, the air conditioner starts again. This situation is extremely common. The rapid rise of the room temperature caused by the shutdown of the air conditioner has a greater impact on the user's comfort and also on the reliability of the air conditioner.

[0005] Another situation is that when the user sets the sleep mode for the air conditioner at night. In the sleep mode, the air conditioner temperature is automatically adjusted, and generally the initial temperature of the air conditioner will be increased by 1-3°C. If the phenomenon of the air conditioner stopping at the temperature point occurs, the user will wake up due to heat during sleep.

[0006] When the air conditioner is turned on and running, the shutdown at the temperature point caused by the sudden change of the set temperature and the shutdown at the temperature point caused by the normal continuous operation of the air conditioner have different characteristics.

[0007] Because for the normal continuous operation of the air conditioner to stop at the temperature point, generally, since the room temperature gradually approaches the set temperature, the air conditioner gradually drops to the lowest frequency, and the minimum output load still exceeds the indoor required load. The air conditioner cannot change the minimum output load and can only perform shutdown processing.

[0008] However, when the set temperature suddenly changes and the air conditioner reaches the set temperature, when the ambient temperature reaches the set temperature or even is lower than the set temperature, the output load of the air conditioner at this time is higher than the indoor required load.

[0009] Comparative patent CN109282448A, "An air conditioner control method and air conditioner that do not stop when reaching the set temperature", the solution is that after the air conditioner reaches the set temperature, the detection data of the indoor environment temperature sensor is ignored, and the air conditioner continues to operate. The main purpose is to reduce the indoor temperature to a lower temperature than the conventional set value.

[0010] CN110173861A, "Operation control method, control device, air conditioner and computer-readable storage medium", the solution of this patent for the non-stop operation of the air conditioner after reaching the set temperature is to increase the opening degree of the electronic expansion valve to reduce the throttling degree, resulting in a decrease in the refrigeration capacity output of the air conditioner. Although this solution can keep the air conditioner running continuously, it leads to the effect of energy inefficiency. Summary of the Invention

[0011] In view of this, the present invention discloses a control method, control device and air conditioner for an air conditioner, aiming to solve the problem of discomfort caused by the shutdown when reaching the temperature point due to the sudden change of the set temperature during the use of the existing air conditioner.

[0012] To solve the above technical problems, the first aspect of the present invention provides an air conditioner control method, characterized in that the air conditioner is provided with a set temperature mutation anti-shutdown logic, and the control method includes:

[0013] Obtain the new user set temperature Ts1 and the corresponding new indoor environment temperature Tn1, and obtain the initial user set temperature Ts0 and the corresponding initial indoor environment temperature Tn0;

[0014] Judge whether the initial user set temperature Ts1 and the corresponding new indoor environment temperature Tn1, the new user set temperature Ts0 and the corresponding initial indoor environment temperature Tn0 meet the preset conditions;

[0015] If so, execute the set temperature mutation anti-shutdown logic.

[0016] Further optionally, judging whether the initial user set temperature Ts0 and the corresponding initial indoor environment temperature Tn0, the new user set temperature Ts1 and the corresponding new indoor environment temperature Tn1 meet the preset conditions includes:

[0017] Judge whether the first difference ΔT1 between the initial user set temperature Ts0 and the corresponding initial indoor environment temperature Tn0 is greater than or equal to the first preset value a;

[0018] If so, compare the second difference ΔT2 between the new user set temperature Ts1 and the corresponding new indoor environment temperature Tn1 with the second preset value b;

[0019] When ΔT2 ≤ b, it is regarded as meeting the preset conditions;

[0020] Wherein, a > b.

[0021] Further optionally, determining whether the initial user - set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0, the new user - set temperature Ts1 and the corresponding new indoor environmental temperature Tn1 satisfy a preset condition further includes:

[0022] When ΔT1 < a, it is regarded as not satisfying the preset condition;

[0023] When ΔT2 > b, it is regarded as not satisfying the preset condition.

[0024] Further optionally, implementing the anti - shutdown logic for sudden change of user - set temperature includes:

[0025] Judging whether the compressor runs to its frequency lower limit value;

[0026] If not, determining the target frequency according to the second difference ΔT2 between the new user - set temperature Ts1 and its corresponding new indoor environmental temperature Tn1.

[0027] Further optionally, determining the target frequency according to the second difference ΔT2 between the new user - set temperature Ts1 and its corresponding new indoor environmental temperature Tn1 includes:

[0028] Judging the interval where the second difference ΔT2 is located;

[0029] Determining the corresponding target frequency according to the interval where the second difference ΔT2 is located.

[0030] Further optionally, the interval where the second difference ΔT2 is located includes:

[0031] When ΔT2 ≤ c, the target frequency is the frequency lower limit value of the compressor;

[0032] When c < ΔT2 ≤ b, controlling the compressor to reduce its frequency so that the target frequency is greater than or equal to the frequency lower limit value. Further optionally, when c < ΔT2 ≤ b, the following formula is used to determine the target frequency:

[0033] F 目标 = max(1 / 2F, F min );

[0034] Wherein, F 目标 represents the target frequency, F represents the current operating frequency of the compressor, and F min represents the frequency lower limit value of the compressor.

[0035] Further optionally, after determining the target frequency, the control method further includes:

[0036] Controlling the compressor to operate at the target frequency for a first preset duration;

[0037] Obtain the current indoor ambient temperature Tn2 and compare Tn2 with Tn1;

[0038] When Tn2≥Tn1, control the compressor to operate at the target frequency until the indoor ambient temperature reaches the new user - set temperature.

[0039] Further optionally, when Tn2<Tn1, the control method further includes:

[0040] Control the compressor to operate at the lower - limit frequency for a second preset duration;

[0041] Obtain the current indoor ambient temperature Tn3 and compare Tn3 with Tn2;

[0042] When Tn3≥Tn2, control the compressor to operate at the lower - limit frequency until the indoor ambient temperature reaches the new user - set temperature.

[0043] Further optionally, when Tn3<Tn2, the control method further includes:

[0044] Reduce the rotational speed of the indoor fan to obtain the target rotational speed;

[0045] Control the indoor fan to operate at the target rotational speed so that the indoor ambient temperature reaches the new user - set temperature.

[0046] Further optionally, when the judgment result that the compressor runs to its lower - limit frequency is yes, the control method further includes:

[0047] Reduce the rotational speed of the indoor fan to obtain the target rotational speed;

[0048] Control the indoor fan to operate at the target rotational speed so that the indoor ambient temperature reaches the new user - set temperature.

[0049] Further optionally, reducing the rotational speed of the indoor fan to obtain the target rotational speed includes:

[0050] Obtain the set rotational speed of the indoor fan and obtain the current indoor ambient temperature Tn4;

[0051] Calculate the third difference between Tn4 and Tn1;

[0052] Reduce the speed by different degrees according to the interval where the set rotational speed is located and the interval where the third difference is located.

[0053] Further optionally, reducing the speed by different degrees according to the interval where the set rotational speed is located and the interval where the third difference is located includes:

[0054] When the set rotational speed is at the low - speed gear or below and the third difference is less than or equal to the third preset value, reduce 1 gear at the current gear;

[0055] When the set rotational speed is at the low wind speed gear or below and the third difference is greater than the third preset value, reduce the preset rotational speed at the current wind speed gear;

[0056] When the set rotational speed is above the low wind speed gear and the third difference is less than or equal to the third preset value, reduce the wind speed gear by 2 at the current wind speed gear;

[0057] When the set rotational speed is above the low wind speed gear and the third difference is greater than the third preset value, reduce the wind speed gear by 1 at the current wind speed gear.

[0058] Further optionally, controlling the indoor fan to operate at the target rotational speed includes:

[0059] Controlling the indoor fan to operate at the target rotational speed for a third preset duration;

[0060] Obtain the current indoor ambient temperature Tn5 and compare Tn5 with Tn4;

[0061] When Tn5 ≥ Tn4, control the indoor fan to continue operating at the target rotational speed until the indoor ambient temperature reaches the new user-set temperature;

[0062] Otherwise, stop the machine.

[0063] The second aspect of the present invention also provides a control device for an air conditioner, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method of any item in the first aspect.

[0064] The third aspect of the present invention also provides an air conditioner, which adopts the method of any item in the first aspect or includes the control device of the second aspect.

[0065] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0066] By setting the temperature mutation anti-shutdown logic, in the case of determining that the air conditioner belongs to the situation where the ambient temperature is lower than the set temperature due to a sudden change in the set temperature, the air conditioner does not shut down and executes the temperature mutation anti-shutdown logic, which can prevent the shutdown problem caused by a sudden change in the temperature of the air conditioner, enabling the room temperature to transition smoothly and reducing the temperature fluctuation. This can not only improve the comfort of users during the use of the air conditioner but also has the characteristics of energy conservation.

[0067] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Description of the Drawings

[0068] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not unduly limit the present invention. Obviously, the drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0069] Figure 1 The flowchart shows the control method of an air conditioner according to an embodiment of the present invention.

[0070] Figure 2 The flowchart shows the control method of an air conditioner according to an embodiment of the present invention.

[0071] Figure 3 The flowchart shows the control method of an air conditioner according to an embodiment of the present invention.

[0072] Figure 4 The flowchart shows the control method of an air conditioner according to an embodiment of the present invention.

[0073] Figure 5 The flowchart shows the control method of an air conditioner according to an embodiment of the present invention.

[0074] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0075] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0076] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "contact", "communication" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] To solve the problem of the air conditioner shutting down due to a sudden adjustment of the set temperature during the air conditioner control process, an embodiment of the first aspect of the present invention provides a control method for an air conditioner. The air conditioner is provided with a logic for preventing shutdown due to sudden change of the set temperature. In this embodiment, taking refrigeration as an example, the same applies to heating.

[0078] The following further describes the control method of this embodiment in detail with reference to the accompanying drawings.

[0079] Combined with Figure 1 the process schematic diagram, the control method of this embodiment includes S1 to S3, where:

[0080] S1, obtain the new user-set temperature Ts1 and the corresponding new indoor environmental temperature Tn1, and obtain the initial user-set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0.

[0081] Combined with Figure 2 the process schematic diagram, after the air conditioner is turned on, detect and record the user's first-set temperature Ts0 and the initial indoor environmental temperature Tn0.

[0082] Initial set temperature Ts0: When the user turns on the machine and finds that the set temperature is not the desired temperature and there is a situation of continuously adjusting the temperature, the final adjustment result is defined as Ts0 at this time. For example, some users set 22°C as soon as they turn on the machine, then 22°C is the first-set temperature. There are also users who find that the previous set temperature was 26°C when they turn on the machine and continuously adjust it to 22°C. In this case, 22°C is used as the first-set temperature.

[0083] New user-set temperature Ts1: In one case, the user will continuously adjust to Ts1, such as continuously adjusting the temperature key from 22°C to 26°C. In another case, such as during sleep control, the air conditioner automatically raises the set temperature at a fixed rate (lowers it for heating), then the adjusted temperature is Ts1.

[0084] S2, determine whether the initial user-set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0, the new user-set temperature Ts1 and the corresponding new indoor environmental temperature Tn1 meet the preset conditions; if so, execute S3.

[0085] S3, execute the logic for preventing shutdown due to sudden change of the user-set temperature.

[0086] Specifically, when the set temperature of the air conditioner changes, it is necessary to determine whether the air conditioner belongs to the situation where the environmental temperature is lower than the set temperature due to a sudden change in the set temperature. In this case, the air conditioner does not shut down, and the logic for preventing shutdown due to sudden change of the set temperature is executed to prevent the shutdown problem caused by a sudden change in the air conditioner temperature. This enables the room temperature to transition smoothly, reduces the temperature fluctuation, not only improves the comfort of the user during the use of the air conditioner, but also has the characteristics of energy saving.

[0087] Further optionally, in combination with Figure 3 the process schematic diagram, step S2 includes:

[0088] S21, determine whether the difference ΔT1 between the initial indoor environment temperature Tn0 and the initial user - set temperature Ts0 is greater than or equal to the first preset value a; if so, execute S22;

[0089] S22, compare the difference ΔT2 between the new indoor environment temperature Tn1 and the new user - set temperature Ts1 with the second preset value b;

[0090] S23, when ΔT2 ≤ b, it is regarded as meeting the preset conditions;

[0091] wherein, a > b.

[0092] Further optionally, in combination with Figure 3 the process schematic diagram, step S2 further includes S24 - S25, wherein:

[0093] S24, when ΔT1 < a, it is regarded as not meeting the preset conditions;

[0094] S25, when ΔT2 > b, it is regarded as not meeting the preset conditions.

[0095] Specifically, the purpose of calculating the difference by determining Tn0 - Ts0 ≥ a (a ≥ 4°C) is to determine that the user's initial set temperature is much lower than the current ambient temperature. If the user's initial set temperature is much lower than the current ambient temperature, it is more likely to cause the situation of shutdown when the set temperature is changed subsequently. On the contrary, if the difference between the user's initial set temperature and the ambient temperature is small, it is not easy to cause the situation of shutdown when the set temperature is changed subsequently. When it is determined that the user changes the set temperature, determine whether the ambient temperature Tn1 when the user changes the set temperature is lower than or equal to the new user - set temperature Ts1, that is, determine whether Tn1 satisfies Tn1 - Ts1 ≤ b, and b is 0°C.

[0096] If it is satisfied, the air conditioner does not execute shutdown at the temperature point and executes the anti - shutdown logic for sudden change of set temperature.

[0097] Further optionally, in combination with Figure 4 the process schematic diagram, S3 includes S31 - S32, wherein:

[0098] S31, determine whether the compressor runs to its frequency lower limit value; if not, execute S32;

[0099] S32, determine the target frequency according to the difference ΔT2 between the new indoor environment temperature Tn1 and the new user - set temperature Ts1.

[0100] When the air conditioner executes the anti-shutdown logic for sudden changes in the set temperature, it is necessary to determine whether the operating frequency of the compressor is the lowest frequency. If not, the target frequency is determined based on the temperature difference between the ambient temperature Tn1 and the set temperature Ts1. If the air conditioner has been reduced to the minimum frequency, it operates at a reduced fan speed according to the user's initial set fan speed.

[0101] Further optionally, S32 includes S321 to S322, where:

[0102] S321, determine the interval in which the second difference ΔT2 is located;

[0103] S322, determine the corresponding target frequency according to the interval in which the second difference ΔT2 is located.

[0104] Combined with Figure 5 the process schematic diagram, determine which interval the difference ΔT2 between the new indoor environmental temperature Tn1 and the new user-set temperature Ts1 belongs to. Here, two intervals are taken as examples for illustration.

[0105] When ΔT2 ≤ c, it indicates that the current indoor ambient temperature is relatively low, and step 101 is executed;

[0106] Step 101, the target frequency is the lower limit value of the compressor's frequency;

[0107] In this embodiment, the preferred value of c is -2°C. When the current indoor ambient temperature is relatively low, the compressor operates at its lower limit frequency value.

[0108] When c < ΔT2 ≤ b, it indicates that the current ambient temperature of the air conditioner is slightly lower than the set temperature, and step 102 is executed;

[0109] Step 102, control the compressor to reduce its frequency to obtain the target operating frequency, where the target frequency is greater than or equal to the lower limit value of the compressor's frequency;

[0110] When the current indoor ambient temperature is slightly lower than the set temperature, the compressor is controlled to reduce its frequency to the target frequency, and the target frequency should be greater than or equal to its lower limit value.

[0111] Further optionally, combined with Figure 5 the process schematic diagram, when c < ΔT2 ≤ b, the following formula is used to determine the target frequency:

[0112] F 目标 = max(1 / 2F, F min );

[0113] where, F 目标 represents the target frequency, F represents the current operating frequency of the compressor, and F min represents the lower limit value of the compressor's frequency. In this embodiment, the compressor reduces its frequency to max(1 / 2F, F min), that is, the larger value between half of the current operating frequency of the compressor and the lower limit value of the compressor's frequency is taken as the target frequency.

[0114] Further optionally, in combination with Figure 4 the process schematic diagram of

[0115] S33, control the compressor to operate at the target frequency for a first preset duration;

[0116] S34, obtain the current indoor ambient temperature Tn2, and compare Tn2 with Tn1;

[0117] S35, when Tn2≥Tn1, control the compressor to operate at the target frequency until the indoor ambient temperature reaches the new user-set temperature.

[0118] Specifically, continuously operate at the target frequency for a first preset duration t1, where t1≤60min;

[0119] Judge whether the current indoor ambient temperature Tn2 satisfies Tn2≥Tn1; if so, it means that the load output by the air conditioner is lower than the load required indoors, and then operate at this target frequency until the set temperature is reached.

[0120] Further optionally, in combination with Figure 4 the process schematic diagram of

[0121] S36, control the compressor to operate at the lower limit frequency for a second preset duration;

[0122] That is, again take the lowest frequency as the target frequency and continuously operate for a second preset duration t2, where t2≤60min;

[0123] S37, obtain the current indoor ambient temperature Tn3, and compare Tn3 with Tn2;

[0124] S38, when Tn3≥Tn2, control the compressor to operate at the lower limit frequency until the indoor ambient temperature reaches the new user-set temperature.

[0125] Specifically, if Tn3≥Tn2, it means that the load output by the air conditioner is lower than the load required indoors, and the compressor can operate at the current frequency. On the contrary, if Tn3<Tn2, it indicates that at the lowest frequency, the load output by the current air conditioner still exceeds the load required indoors, and then the operation mode of the air conditioner needs to be adjusted to achieve the purpose of reducing the output load.

[0126] Further optionally, in combination with Figure 4Schematic diagram of the process. When Tn3 < Tn2, the control method further includes S39 - S40, where:

[0127] S39, reducing the indoor fan speed to the target speed;

[0128] S40, controlling the indoor fan to operate at the target speed. Specifically, by reducing the indoor fan speed, the air conditioner output load is reduced so that the load output by the air conditioner is lower than the load required indoors.

[0129] Further optionally, in step S31, if it is determined that the compressor frequency has run to the minimum frequency, indicating that at the lowest frequency, the load output by the current air conditioner still exceeds the load required indoors, then the indoor fan speed is reduced to the target speed, and the speed reduction control logic is the same as reducing the indoor fan speed to the target speed in step S39.

[0130] Further optionally, reducing the indoor fan speed to the target speed in step S39 includes S391 - S393, where:

[0131] S391, obtaining the set speed of the indoor fan and obtaining the current indoor ambient temperature Tn4;

[0132] S392, calculating the third difference between Tn4 and Tn1;

[0133] S393, performing different degrees of speed reduction according to the interval where the set speed is located and the interval where the third difference is located.

[0134] It should be noted here that if the air conditioner executes the anti - shutdown logic for sudden change of the user - set temperature and enters S39 after executing S38, then the indoor ambient temperature Tn4 is the same as the indoor ambient temperature Tn3.

[0135] Further optionally, in combination with Table 1, S393 includes the following steps:

[0136] When the set speed is at the low - wind gear or below and the third difference is less than or equal to the third preset value, reduce 1 wind gear at the current wind gear;

[0137] When the set speed is at the low - wind gear or below and the third difference is greater than the third preset value, reduce the preset speed value at the current wind gear;

[0138] When the set speed is above the low - wind gear and the third difference is less than or equal to the third preset value, reduce 2 wind gears at the current wind gear;

[0139] When the set speed is above the low - wind gear and the third difference is greater than the third preset value, reduce 1 wind gear at the current wind gear.

[0140] Specifically, the indoor fan speed can be divided into ultra - silent gear, silent gear, low - wind gear, medium - wind gear, high - wind gear, and ultra - high - wind gear. The preset speed value is preferably 50 RPM.

[0141] Table 1

[0142]

[0143] Further optionally, step S40 includes S401 to S404, where:

[0144] S401, control the indoor fan to operate at the target speed for a third preset duration t3;

[0145] S402, obtain the current indoor environmental temperature Tn5, and compare Tn5 with Tn4;

[0146] S403, when Tn5 ≥ Tn4, control the indoor fan to continue operating at the target speed until the indoor environmental temperature reaches the new user - set temperature;

[0147] S404, when Tn5 < Tn4, then stop the machine.

[0148] Combined with Figure 5 the process schematic diagram, the air conditioner operates at the target wind gear for a third preset duration t3, t3 ≤ 60 min. Then, it is judged whether the current indoor environmental temperature Tn5 satisfies Tn5 ≥ Tn4. If so, it operates at the current frequency and current wind gear until the set temperature is reached, and then controls with the normal operation logic; if not, then stop the machine.

[0149] The control method of this embodiment, by setting the anti - shutdown logic for sudden changes in the set temperature, when it is determined that the air conditioner belongs to the case where the environmental temperature is lower than the set temperature due to a sudden change in the set temperature, the air conditioner does not stop, but executes the anti - shutdown logic for sudden changes in the set temperature, which can prevent the shutdown problem caused by sudden changes in the temperature of the air conditioner. It enables the room temperature to transition smoothly, reduces the temperature fluctuation, not only improves the comfort of users during the use of the air conditioner, but also has the characteristic of energy conservation.

[0150] The second - aspect embodiment of the present invention also provides a control device for an air conditioner, which includes one or more processors and a non - transitory computer - readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method of any item in the first - aspect embodiment.

[0151] The third - aspect embodiment of the present invention also provides an air conditioner, which adopts the method of any item in the first - aspect embodiment, or includes the control device of the second - aspect embodiment.

[0152] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0153] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0154] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above as equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner is provided with a logic for preventing shutdown due to sudden change in set temperature, and the control method includes: Obtaining a new user set temperature Ts1 and the corresponding new indoor environmental temperature Tn1, and obtaining an initial user set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0; Judging whether the initial user set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0, the new user set temperature Ts1 and the corresponding new indoor environmental temperature Tn1 meet the preset conditions for executing the logic for preventing shutdown due to sudden change in user set temperature; If so, execute the logic for preventing shutdown due to sudden change in set temperature; Among them, judging whether the initial user set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0, the new user set temperature Ts1 and the corresponding new indoor environmental temperature Tn1 meet the preset conditions includes: Judging whether the first difference ΔT1 between the initial indoor environmental temperature Tn0 and the initial user set temperature Ts0 is greater than or equal to the first preset value a; If so, comparing the second difference ΔT2 between the new indoor environmental temperature Tn1 and the new user set temperature Ts1 with the second preset value b; When ΔT2 ≤ b, it is regarded as meeting the preset conditions; where a > b; Among them, executing the logic for preventing shutdown due to sudden change in set temperature includes: Judging whether the compressor runs to its frequency lower limit value; If not, determining the target frequency according to the second difference ΔT2 between the new indoor environmental temperature Tn1 and the new user set temperature Ts1; When ΔT2 ≤ c, the target frequency is the frequency lower limit value of the compressor; When c < ΔT2 ≤ b, controlling the compressor to reduce its frequency to obtain the target frequency, and the target frequency is greater than or equal to the frequency lower limit value of the compressor.

2. The control method according to claim 1, wherein Judging whether the initial user set temperature Ts0 and the corresponding initial indoor environmental temperature Tn0, the new user set temperature Ts1 and the corresponding new indoor environmental temperature Tn1 meet the preset conditions also includes: When ΔT1 < a, it is regarded as not meeting the preset conditions; When ΔT2 > b, it is regarded as not meeting the preset conditions.

3. The control method according to claim 2, characterized in that, When c < ΔT2 ≤ b, the following formula is used to determine the target frequency: F 目标 = max(1 / 2F, F min ); Among them, F 目标 represents the target frequency, F represents the current operating frequency of the compressor, and F min represents the lower limit value of the frequency of the compressor.

4. The control method according to any one of claims 1 to 3, characterized in that, After determining the target frequency, the control method further includes: Controlling the compressor to run at the target frequency for a first preset duration; Obtaining the current indoor environmental temperature Tn2, and comparing Tn2 with Tn1; When Tn2 ≥ Tn1, controlling the compressor to run at the target frequency until the indoor environmental temperature reaches the new user set temperature.

5. The control method according to claim 4, characterized in that, When Tn2 < Tn1, the control method further includes: Controlling the compressor to run at the frequency lower limit value for a second preset duration; Obtaining the current indoor environmental temperature Tn3, and comparing Tn3 with Tn2; When Tn3 ≥ Tn2, controlling the compressor to run at the frequency lower limit value until the indoor environmental temperature reaches the new user set temperature.

6. The control method according to claim 5, wherein, When Tn3 < Tn2, the control method further includes: Reducing the rotational speed of the indoor fan to the target rotational speed; Controlling the indoor fan to run at the target rotational speed.

7. The control method according to claim 1, characterized in that When the judgment result of determining whether the compressor runs to its lower frequency limit value is yes, the control method further includes: Reducing the rotational speed of the indoor fan to a target rotational speed; Controlling the indoor fan to run at the target rotational speed.

8. The control method according to claim 7, characterized in that The reducing the rotational speed of the indoor fan to the target rotational speed includes: Obtaining the set rotational speed of the indoor fan and the current indoor environmental temperature Tn4; Calculating a third difference between Tn4 and Tn1; Performing speed reduction to different extents according to the interval where the set rotational speed is located and the interval where the third difference is located.

9. The control method according to claim 8, wherein, The performing speed reduction to different extents according to the interval where the set rotational speed is located and the interval where the third difference is located includes: When the set rotational speed is at or below the low wind speed setting and the third difference is less than or equal to a third preset value, reducing 1 wind speed setting at the current wind speed setting; When the set rotational speed is at or below the low wind speed setting and the third difference is greater than the third preset value, reducing a preset rotational speed at the current wind speed setting; When the set rotational speed is above the low wind speed setting and the third difference is less than or equal to the third preset value, reducing 2 wind speed settings at the current wind speed setting; When the set rotational speed is above the low wind speed setting and the third difference is greater than the third preset value, reducing 1 wind speed setting at the current wind speed setting.

10. The control method according to claim 9, characterized in that, The controlling the indoor fan to run at the target rotational speed includes: Controlling the indoor fan to run at the target rotational speed for a third preset duration; Obtaining the current indoor environmental temperature Tn5 and comparing Tn5 with Tn4; When Tn5≥Tn4, controlling the indoor fan to continue running at the target rotational speed until the indoor environmental temperature reaches the new user-set temperature; If not, stopping the machine.

11. A control device for an air conditioner, characterized in that, It includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of claims 1-10.

12. An air conditioner, characterized in that, It adopts the method according to any one of claims 1-10, or includes the control device according to claim 11.

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