Control method of air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, and aims to solve the problems of how to effectively prevent an indoor heat exchanger from frosting and meet the low-temperature refrigeration requirement of a user while reducing energy consumption. In order to achieve the purpose, according to the control method of the air conditioner, when the air conditioner meets the low-temperature refrigeration condition, the opening degree of a first air guide plate and the opening degree of a second air guide plate are adjusted according to the exhaust pressure and the preset pressure, so that the air circulation efficiency of an outdoor unit can be adjusted, and the heat exchange efficiency of an outdoor heat exchanger is weakened; therefore, the evaporation temperature of the indoor heat exchanger is increased, frosting of the indoor heat exchanger is avoided, normal operation of the air conditioner under the low-temperature refrigeration working condition is ensured, the low-temperature refrigeration requirement of a user is met, the operation reliability of the air conditioner is improved, the refrigeration operation range of the air conditioner is widened, dependence on a heating device is not needed, and energy consumption is low.

Description

Technical Field

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

[0002] Air conditioners have been widely used in thousands of households, and their usage scenarios are becoming increasingly diverse, with more extensive requirements for the working range. For example, in enclosed scenarios such as kitchens or machine rooms where it is inconvenient to ventilate by opening windows, the air conditioner needs to operate in refrigeration in a low-temperature environment to maintain the temperature stability of the indoor environment. However, during low-temperature refrigeration operation, the air conditioner may face the following problems: the evaporation temperature of the indoor heat exchanger is too low, resulting in easy frosting of the indoor heat exchanger. This not only weakens the refrigeration effect of the air conditioner but may also cause incomplete evaporation of the refrigerant, causing the liquid refrigerant to flow back to the compressor, thereby damaging the compressor.

[0003] To solve the problem of easy frosting of the indoor heat exchanger during the low-temperature refrigeration operation of the air conditioner, the commonly used method at present is to add a heating device to the indoor unit to increase the evaporation temperature, thereby preventing the indoor heat exchanger from frosting. However, this undoubtedly leads to an increase in energy consumption.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To solve at least one problem in the prior art, that is, to solve the problem of how to effectively prevent frosting of the indoor heat exchanger while reducing energy consumption and meeting the user's low-temperature refrigeration requirements. For this purpose, the present application provides a control method for an air conditioner. The outdoor unit of the air conditioner includes a body having at least one air outlet through-hole and at least one air inlet through-hole, and a wind deflector group. At least one of the at least one air outlet through-holes is covered with a first snow-proof cover having an air outlet, and at least one of the at least one air inlet through-holes is covered with a second snow-proof cover having an air inlet. At least one of the at least one second snow-proof covers is communicated with at least one of the at least one first snow-proof covers; the wind deflector group includes a first wind deflector pivotally connected to the air outlet and the remaining air outlet through-holes not covered with the first snow-proof cover, and a second wind deflector pivotally connected to the air inlet and the remaining air inlet through-holes not covered with the second snow-proof cover; where n≥1, m≥1; the control method includes:

[0006] When the air conditioner operates in the refrigeration mode, obtain the outdoor ambient temperature T ao ;

[0007] Based on the outdoor ambient temperature T ao , determine whether the air conditioner meets the low-temperature refrigeration condition;

[0008] When the low-temperature refrigeration condition is met, obtain the exhaust pressure P of the compressor d ;

[0009] Compare the exhaust pressure P d with the magnitude of the preset pressure P;

[0010] Based on the comparison result, adjust the opening degrees of the first air deflector and the second air deflector respectively.

[0011] In a preferred technical solution of the above control method, the low-temperature refrigeration condition is T2 < T ao ≤ T1, and when the preset pressure P includes a first preset pressure P1, the step of "based on the comparison result, adjust the opening degrees of the first air deflector and the second air deflector respectively" further includes:

[0012] When P d < P1, then adjust the opening degree of at least one of the first air deflectors to a first opening degree K1 and the opening degree of at least one of the second air deflectors to a second opening degree K2;

[0013] wherein, T1 is a first preset temperature, T2 is a second preset temperature, 0° < min(K1, K2) < min(K max1 , K max2 ), max(K1, K2) ≤ max(K max1 , K max2 ), K max1 is the first maximum opening degree of the first air deflector, and K max2 is the second maximum opening degree of the second air deflector.

[0014] In a preferred technical solution of the above control method, when the preset pressure P further includes a second preset pressure P2, the step of "based on the comparison result, adjust the opening degrees of the first air deflector and the second air deflector respectively" further includes:

[0015] When P1 ≤ P d < P2, then adjust the opening degree of at least one of the first air deflectors to a third opening degree K3 and the opening degree of at least one of the second air deflectors to a fourth opening degree K4;

[0016] wherein, min(K max1 , K max2 ) > min(K3, K4) ≥ min(K1, K2), and max(K max1 , K max2 ) ≥ max(K3, K4) ≥ max(K1, K2).

[0017] In a preferred technical solution of the above control method, the control method further includes:

[0018] When P dWhen it is ≥P2, the opening degree of at least one of the first air guiding plates is adjusted to the first maximum opening degree K max1 and the opening degree of at least one of the second air guiding plates is adjusted to the second maximum opening degree K max2 .

[0019] In a preferred technical solution of the above control method, the low-temperature refrigeration condition is T3 < T ao ≤ T2, and when the preset pressure P further includes a third preset pressure P3, the step of "respectively adjusting the opening degrees of the first air guiding plate and the second air guiding plate based on the comparison result" further includes:

[0020] When P d < P3, the opening degree of at least one of the first air guiding plates is adjusted to the fifth opening degree K5 and the opening degree of at least one of the second air guiding plates is adjusted to the sixth opening degree K6;

[0021] wherein, T3 is the third preset temperature, 0 < min(K5, K6) ≤ min(K1, K2), and max(K5, K6) ≤ max(K1, K2).

[0022] In a preferred technical solution of the above control method, when the preset pressure P further includes a fourth preset pressure P4, the step of "respectively adjusting the opening degrees of the first air guiding plate and the second air guiding plate based on the comparison result" further includes:

[0023] When P3 ≤ P d < P4, the opening degree of at least one of the first air guiding plates is adjusted to the seventh opening degree K7 and the opening degree of at least one of the second air guiding plates is adjusted to the eighth opening degree K8;

[0024] wherein, min(K max1 , K max2 ) > min(K7, K8) ≥ min(K5, K6), and max(K max1 , K max2 ) ≥ max(K7, K8) ≥ max(K5, K6).

[0025] In a preferred technical solution of the above control method, the control method further includes:

[0026] When P d ≥ P4, the opening degree of at least one of the first air guiding plates is adjusted to the ninth opening degree K9 and the opening degree of at least one of the second air guiding plates is adjusted to the tenth opening degree K 10 ;

[0027] wherein min(K max1 , K max2 ) > min(K9, K 10 ) ≥ min(K7, K8), and max(Kmax1 , K max2 ) ≥ max(K9, K 10 ) ≥ max(K7, K8).

[0028] In a preferred technical solution of the above control method, when the low-temperature refrigeration condition is T ao ≤ T3, and the preset pressure includes the fifth preset pressure P5, the step of "respectively adjusting the opening degrees of the first air deflector and the second air deflector based on the comparison result" further includes:

[0029] When P d < P5, then control all the first air deflectors to close the corresponding air outlets and all the second air deflectors to close the corresponding air inlets; where P3 ≤ P5; and / or

[0030] When P d ≥ P5, then adjust the opening degree of at least one of the first air deflectors to the eleventh opening degree K 11 and the opening degree of at least the second air deflector to the twelfth opening degree K 12 ;

[0031] where 0 ≤ min(K 11 , K 12 ) < min(K5, K6), and 0 ≤ max(K 11 , K 12 ) < max(K5, K6).

[0032] In a preferred technical solution of the above control method, the control method further includes:

[0033] When T ao > T1, then adjust the opening degrees of all the first air deflectors to the first maximum opening degree K max1 and the opening degrees of all the second air deflectors to the second maximum opening degree K max2 .

[0034] In a preferred technical solution of the above control method, before the step of "acquiring the outdoor ambient temperature Tao when the air conditioner operates in the refrigeration mode", it further includes:

[0035] In response to the start instruction of the refrigeration mode, control all the first air deflectors and all the second air deflectors to remain in the closed state; and / or

[0036] The control method further includes:

[0037] In response to the start instruction of the heating mode, control all the first air deflectors to open with the first maximum opening degree K max1 and all the second air deflectors to open with the second maximum opening degree Kmax2 Turn on.

[0038] Those skilled in the art can understand that for the control method of the air conditioner in this application, when the air conditioner meets the low-temperature refrigeration condition, the opening degrees of the first air deflector and the second air deflector are respectively adjusted according to the magnitude relationship between the exhaust pressure and the preset pressure, so as to adjust the air circulation efficiency of the outdoor unit, weaken the heat exchange efficiency of the outdoor heat exchanger, increase the outlet temperature of the outdoor heat exchanger, thereby increasing the evaporation temperature of the indoor heat exchanger, avoiding frosting on the indoor heat exchanger, ensuring the normal operation of the air conditioner under low-temperature refrigeration conditions, meeting the user's low-temperature refrigeration requirements, and improving the operation reliability and refrigeration operation range of the air conditioner. In addition, by adjusting the opening degrees of the first air deflector and the second air deflector, this application effectively solves the problem that the indoor heat exchanger of the air conditioner is prone to frosting under low-temperature refrigeration conditions, without relying on additional heating devices and with low energy consumption.

[0039] Furthermore, when the outdoor ambient temperature is greater than the second preset temperature and less than or equal to the first preset temperature, and the exhaust pressure is less than the first preset pressure, adjusting the opening degree of the first air deflector to the first opening degree and the opening degree of the second air deflector to the second opening degree is beneficial to slowing down the air circulation efficiency and reducing the heat exchange efficiency of the outdoor heat exchanger, thereby increasing the outlet temperature of the outdoor heat exchanger, and further increasing the heat exchange efficiency of the indoor heat exchanger to avoid frosting on the indoor heat exchanger.

[0040] Even further, when the exhaust pressure is greater than or equal to the first preset pressure and less than the second preset pressure, adjusting the opening degree of at least one first air deflector to the third opening degree and the opening degree of the second air deflector to the fourth opening degree can effectively avoid frosting on the indoor heat exchanger while improving the heat exchange efficiency of the outdoor heat exchanger and the refrigeration effect of the air conditioner.

[0041] Even further, when the exhaust pressure is greater than or equal to the second preset pressure, by controlling the opening degrees of at least one first air deflector and at least one second air deflector to their respective maximum opening degrees, it is possible to avoid frosting on the indoor heat exchanger while improving the refrigeration effect of the air conditioner.

[0042] Furthermore, when the outdoor ambient temperature is greater than the third preset temperature and less than or equal to the second preset temperature, and the exhaust pressure is less than the third preset pressure, adjusting the opening degree of at least one first air deflector to the fifth opening degree and the opening degree of at least one second air deflector to the sixth opening degree can avoid frosting on the indoor heat exchanger while ensuring the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0043] Further, when the exhaust pressure is greater than or equal to the third preset pressure and less than the fourth preset pressure, by adjusting the opening degree of at least one first air deflector to the seventh opening degree and the opening degree of at least one second air deflector to the eighth opening degree, it is possible to improve the refrigeration effect of the air conditioner while effectively avoiding frosting on the indoor heat exchanger.

[0044] Further, when the exhaust pressure is greater than or equal to the fourth preset pressure, by adjusting the opening degree of at least one first air deflector to the ninth opening degree and the opening degree of at least one second air deflector to the tenth opening degree, it is possible to avoid frosting on the indoor heat exchanger while improving the refrigeration effect of the air conditioner.

[0045] Further, when the outdoor ambient temperature is less than the third preset temperature and the exhaust pressure is less than the fifth preset pressure, by controlling all the first air deflectors to close the corresponding air outlets and all the second air deflectors to close the corresponding air inlets, the outdoor unit can achieve internal air circulation, thereby avoiding frosting on the indoor heat exchanger. When the exhaust pressure is greater than the fifth preset pressure, by adjusting the opening degree of at least one first air deflector to the eleventh opening degree and the opening degree of at least one second air deflector to the twelfth opening degree, it is possible to effectively avoid frosting on the indoor heat exchanger while improving the refrigeration effect of the air conditioner.

[0046] Further, when the outdoor ambient temperature is greater than the first preset temperature, by adjusting the opening degrees of all the first air deflectors and the second air deflectors to their respective maximum opening degrees, the refrigeration efficiency of the air conditioner can be fully exerted, ensuring that the indoor temperature can be rapidly reduced and providing a comfortable indoor environment for users.

[0047] Further, when the air conditioner responds to the start command of the cooling mode, by controlling all the first air deflectors and all the second air deflectors to remain closed, the problem of frosting on the indoor heat exchanger during operation of the cooling mode in a low-temperature environment can be effectively avoided. In addition, when the air conditioner responds to the start command of the heating mode, by controlling all the first air deflectors and all the second air deflectors to open with their respective maximum opening degrees, the heating efficiency of the air conditioner can be fully exerted, ensuring that the indoor temperature can be rapidly increased and providing a warm and comfortable indoor environment for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

[0049] Figure 1 is a flowchart of the control method of the air conditioner of the present application;

[0050] Figure 2 is a structural diagram of the outdoor unit of the present application;

[0051] Figure 3Front view of the outdoor unit of the present application

[0052] Figure 4 Structural diagram of the first snow protection cover of the present application

[0053] Figure 5 Structural diagram of the first snow protection cover from another angle of the present application

[0054] Figure 6 Logic diagram of a possible implementation manner of the control method of the air conditioner of the present application

[0055] Explanation of reference numerals

[0056] 1. Body; 2. First snow protection cover; 21. First connection hole; 22. First air deflector; 23. Air outlet 23; 3. Left snow protection cover; 4. Right snow protection cover; 5. Rear snow protection cover; 51. Second connection hole; 6. Front snow protection cover; 71. Air inlet; 8. Connecting pipe Detailed implementation manners

[0057] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application

[0058] It should be noted that in the description of the present application, terms indicating directions or positional relationships such as "upper", "lower", "inner", "bottom", "end" are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application

[0059] In addition, it should be noted that in the description of the present application, unless otherwise clearly specified and limited, terms such as "set", "connected", "communicated" 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, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations

[0060] Combined with Figures 1-6 Describe the control method of the air conditioner of the present application

[0061] Such as Figures 2-5As shown in the figure, the air conditioner of the present application includes an outdoor unit. The outdoor unit of the air conditioner includes a body 1 having at least one air outlet through hole and at least one air inlet through hole, and a wind deflector group. At least one of the at least one air outlet through holes is covered with a first snow protection cover 2 having an air outlet 23. At least one of the at least one air inlet through holes is covered with a second snow protection cover having an air inlet 71. At least one second snow protection cover communicates with at least one snow protection cover 2. The wind deflector group includes a first wind deflector 22 pivotally mounted at the air outlet 23 and the other air outlet through holes not covered with the first snow protection cover 2, and a second wind deflector pivotally mounted at the air inlet 71 and the other air inlet through holes not covered with the second snow protection cover. In the above setting method, by controlling the opening degrees of the first wind deflector 22 and the second wind deflector, the air circulation speed of the outdoor unit can be adjusted, and then the heat exchange capacity of the outdoor heat exchanger can be adjusted, ensuring the normal operation of the air conditioner under low-temperature refrigeration conditions and avoiding frosting of the indoor heat exchanger. In addition, by connecting the first snow protection cover 2 and the second snow protection cover, when the air inlet 71 and the air outlet 23 are both closed by the corresponding wind deflectors, the outdoor unit can realize internal air circulation, so that the outlet temperature of the outdoor heat exchanger increases, thereby increasing the evaporation temperature of the indoor heat exchanger and effectively avoiding frosting of the outdoor heat exchanger. When the first wind deflector 22 and the second wind deflector are in the closed state, dust and foreign objects can be effectively blocked from entering the outdoor unit. In addition, the first snow protection cover 2 and the second snow protection cover can effectively block snowflakes from directly entering the air inlet 71 and the air outlet 23 of the outdoor unit, avoiding the blockage of air flow caused by snow accumulation.

[0062] Next, refer to Figures 2-4 , an air outlet through hole is provided at the top of the body 1. The body 1 at the air outlet through hole is covered with a first snow protection cover 2. An air outlet 23 is provided on the side wall of the first snow protection cover 2. A first wind deflector 22 is pivotally mounted at the air outlet 23. The first wind deflector 22 can open or close the air outlet 23 during rotation.

[0063] It should be noted that the present application does not limit the way the first wind deflector 22 opens or closes the air outlet 23, as long as the first wind deflector 22 can open or close the air outlet 23 during rotation. For example, a first stepping motor is provided on the outer wall of the first snow protection cover 2 at the air outlet 23. The first wind deflector 22 is driven by the first stepping motor to rotate, so that the first driving motor can precisely control the opening degree of the first wind deflector 22 by adjusting its own rotation speed.

[0064] Of course, the setting position and the number of the air outlet through holes in this application are not fixed, and those skilled in the art can adjust them as needed. For example, the air outlet through holes can also be arranged on the front side, rear side, left side or right side of the machine body 1. And / or, the number of the air outlet through holes can also be 2 or other numbers. For example, when the number of the air outlet through holes is 2, one air outlet through hole can be arranged on the top of the machine body 1, and the other air outlet through hole can be arranged on the front side of the machine body 1. At this time, the first snow protection covers 2 can be covered on the machine body 1 at the two air outlet through holes, and the first air guide plates are arranged on the two first snow protection covers 2, or the first snow protection cover 2 is covered at the air outlet through hole on the top of the machine body 1, and the first snow protection cover 2 is not covered at the air outlet through hole on the front side of the machine body 1, and the first air guide plates 22 are arranged at the air outlet through hole on the front side of the machine body 1 and the air inlet of the first snow protection cover 2.

[0065] Next, refer to Figures 2-4 , four air inlet through holes are formed in the machine body 1, and the four air inlet through holes are respectively arranged on the front side, rear side, left side and right side of the machine body 1. Correspondingly, second snow protection covers are covered at the air inlet through holes on the front side, rear side, left side and right side. Air inlets 71 are arranged at the bottoms of the four second snow protection covers, so that snowflakes can be prevented from accumulating in the air inlets 71, and normal ventilation of the outdoor unit can be ensured. Second air guide plates are arranged at the air inlets 71 of the four second snow protection covers, and the second air guide plates pivot at the air inlets 71, so that the air inlets 71 can be opened or closed during the rotation of the second air guide plates.

[0066] It should be noted that, in order to facilitate the identification of the four second snow protection covers, the four second snow protection covers are sequentially named as the front snow protection cover 6, the rear snow protection cover 5, the left snow protection cover 3 and the right snow protection cover 4 according to their positions arranged on the machine body 1. In addition, the structure of the four second snow protection covers in this application is not limited, as long as snowflake accumulation can be avoided. For example, the top of the second snow protection cover is arranged in a structure that slopes downward.

[0067] In addition, it should also be noted that the manner in which the second air guide plate opens or closes the air inlet 71 in this application is not limited, as long as the air inlet 71 can be opened or closed during the rotation of the second air guide plate. For example, a second stepper motor is arranged on the outer wall of the second snow protection cover of each air inlet 71, and the second air guide plate is driven to rotate by the second stepper motor, so that the second stepper motor can accurately control the opening degree of the second air guide plate by adjusting its own rotation speed.

[0068] Of course, the number of air inlet through holes provided on the body 1 in this application is not fixed, and those skilled in the art can adjust it according to specific application scenarios. For example, the number of air inlet through holes can also be 1, that is, the air inlet through holes can be provided only on the front side, rear side, left side or right side of the body. Or the number of air inlet through holes can also be 2, that is, the air inlet through holes can be provided on the front side and the rear side of the body respectively, or on the left side and the right side of the body respectively. It should be noted that when there is one air inlet through hole provided on the body 1, a second snow shield is covered on the body 1 at the corresponding air inlet through hole, and a second air deflector is provided on the second snow shield. When there are two or more air inlet through holes provided on the body, second snow shields can be covered on the body 1 at all the air inlet through holes, or second snow shields can be covered on the body 1 at some of the air inlet through holes, and second snow shields are not covered on the body 1 at the remaining air inlet through holes. At this time, second air deflectors are provided at the air inlets of the second snow shields and at the air outlet through holes where the second snow shields are not covered.

[0069] Next, refer to Figure 5 , four first connection holes 21 are provided on the first snow shield 2, a second connection hole 51 is provided on each of the four second snow shields, and the four first connection holes 21 respectively correspond to the second connection holes 51 on the four second snow shields and are respectively connected through connecting pipes 8, so that the first snow shield 2 can be respectively communicated with the four second snow shields. When the air inlets 71 and the air outlets 23 are closed by the corresponding air deflectors, the outdoor unit can realize internal air circulation, the outlet temperature of the outdoor heat exchanger is increased, thereby increasing the evaporation temperature of the indoor heat exchanger, and effectively avoiding the problem of frosting of the outdoor heat exchanger.

[0070] It should be noted that the number of the first connection holes 21 on the first snow shield 2 can correspond to the number of the second snow shields, that is, when there is only one second snow shield provided on the body 1, only one first connection hole 21 connected to the second connection hole 51 on the second snow shield is provided on the first snow shield 2. Or, the number of the first connection holes 21 on the first snow shield 2 may not correspond to the number of the second snow shields, as long as it is ensured that one first snow shield 2 and one second snow shield are communicated.

[0071] For example Figure 1 As shown, based on the above setting method, the control method of the air conditioner in this application includes:

[0072] S101. When the air conditioner operates in the cooling mode, obtain the outdoor ambient temperature T ao . For example, the outdoor ambient temperature is obtained by setting a temperature sensor on the outdoor unit.

[0073] S102. Based on the outdoor ambient temperature T ao, determine whether the air conditioner meets the low-temperature refrigeration condition. For example, after obtaining the outdoor ambient temperature, it can be determined whether the air conditioner meets the low-temperature refrigeration condition according to the magnitude of the outdoor ambient temperature.

[0074] S103. When the low-temperature refrigeration condition is met, obtain the exhaust pressure P of the compressor d . For example, when the low-temperature refrigeration condition is met, the exhaust pressure of the compressor can be obtained through a pressure sensor arranged at the exhaust port of the compressor. Of course, the exhaust pressure of the compressor can also be indirectly obtained by arranging a temperature sensor and other detection components at the exhaust port of the compressor.

[0075] S104. Compare the exhaust pressure P d with the preset pressure P. For example, after obtaining the exhaust pressure, compare the magnitudes of the two by respectively comparing whether the difference between the exhaust pressure and the preset pressure is greater than 0, or whether the ratio between the two is greater than 1.

[0076] S105. Based on the comparison result, adjust the opening degrees of the first air deflector 22 and the second air deflector respectively. For example, after determining the magnitudes of the exhaust pressure and the preset pressure, by respectively controlling the opening degrees of the first air deflector 22 and the second air deflector, the air circulation speed can be changed, and then the heat exchange efficiency of the outdoor heat exchanger can be adjusted to ensure the normal operation of the air conditioner under the low-temperature refrigeration condition and avoid frosting of the indoor heat exchanger.

[0077] In this application, when the air conditioner meets the low-temperature refrigeration condition, according to the magnitudes of the exhaust pressure and the preset pressure, the opening degrees of the first air deflector 22 and the second air deflector are adjusted respectively, so that the air circulation efficiency of the outdoor unit can be adjusted, the heat exchange efficiency of the outdoor heat exchanger can be weakened, the outlet temperature of the outdoor heat exchanger can be increased, thereby increasing the evaporation temperature of the indoor heat exchanger, avoiding frosting of the indoor heat exchanger, ensuring the normal operation of the air conditioner under the low-temperature refrigeration condition, meeting the user's low-temperature refrigeration requirements, and improving the operation reliability and refrigeration operation range of the air conditioner. In addition, this application effectively solves the problem that the indoor heat exchanger of the air conditioner is prone to frosting under the low-temperature refrigeration condition by adjusting the opening degrees of the first air deflector and the second air deflector, without relying on an additional heating device and with low energy consumption.

[0078] The preferred embodiments of the control method of the air conditioner in this application are introduced below. Among them, the first preset temperature is T1, the second preset temperature is T2, and the third preset temperature is T3.

[0079] In one embodiment, according to the control method of claim 1, it is characterized in that, before the step of "when the air conditioner operates in the refrigeration mode, obtain the outdoor ambient temperature Tao", the following steps are further included:

[0080] In response to the start instruction of the cooling mode, control all the first air deflector plates 22 and all the second air deflector plates to remain in the closed state.

[0081] It should be noted that in order to avoid the problem of frosting on the indoor heat exchanger due to the low outdoor ambient temperature when the air conditioner operates in the cooling mode, usually when the air conditioner responds to the start instruction of the cooling mode, control all the first air deflector plates 22 and all the second air deflector plates to remain in the closed state, so that the outdoor unit of the air conditioner is in the state of internal air circulation. The specific opening degrees of the first air deflector plate 22 and the second air deflector plate are adjusted according to the subsequent outdoor ambient temperature and the exhaust pressure of the compressor to ensure the cooling efficiency while avoiding frosting on the indoor heat exchanger.

[0082] For example, it is described with the number of the first air deflector plates 22 being 1 and the number of the second air deflector plates being 4. When the air conditioner receives the start instruction of the cooling mode, one first air deflector plate 22 and four second air deflector plates on the outdoor unit can be controlled to remain in the closed state.

[0083] In one embodiment, the control method includes:

[0084] When Tao > T1, then adjust the opening degrees of all the first air deflector plates to the first maximum opening degree K max1 and the opening degrees of all the second air deflector plates to the second maximum opening degree K max2 .

[0085] It should be noted that when the air conditioner operates in the cooling mode under the condition that the outdoor ambient temperature is greater than the first preset temperature, since the outdoor ambient temperature is relatively high and there is no frosting on the indoor heat exchanger, by controlling all the first air deflector plates 22 and all the second air deflector plates to open with their maximum opening degrees respectively, the air circulation efficiency can be enhanced, the cooling efficiency can be improved, and a more comfortable environment can be provided for users. When the air conditioner operates in the cooling mode under the condition that the outdoor ambient temperature is less than or equal to the first preset temperature, since the outdoor ambient temperature is low and the air conditioner meets the condition of low-temperature cooling, there is a risk of frosting on the indoor heat exchanger. Among them, the first maximum opening degree K max1 and the maximum opening degree K of the second air deflector plate max2 can be the same or different, and the specific size relationship can be adjusted according to the actual situation.

[0086] For example, taking the first preset temperature T1 as -5 °C, the first maximum opening degree K max1 as 90°, and the second maximum opening degree K max2is 90°, an air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, and air inlet through holes for covering the second snow shields are respectively provided at the front, rear, left, and right sides for illustration. When Tao > -5°C, it indicates that the outdoor ambient temperature is relatively high, the air conditioner does not meet the low-temperature refrigeration condition, and there is no frosting problem with the indoor heat exchanger. Therefore, in order to improve the refrigeration efficiency of the air conditioner, the first air deflector 22 on the first snow shield 2 can be controlled to open at 90°, and the second air deflectors on the front, rear, left, and right snow shields can all be opened at 90°.

[0087] Another example is given. Taking the first preset temperature T1 as -5°C, the first maximum opening degree K max1 is 90°, the second maximum opening degree K max2 is 100°, an air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, air inlet through holes for covering the second snow shields are respectively provided at the front and rear sides, and air inlet through holes without covering the second snow shields are provided at the left and right sides for illustration. When Tao > -5°C, it indicates that the outdoor ambient temperature is relatively high, the air conditioner does not meet the low-temperature refrigeration condition, and there is no frosting problem with the indoor heat exchanger. Therefore, in order to improve the refrigeration efficiency of the air conditioner, the first air deflector 22 on the first snow shield 2 can be controlled to open at 90°, the second air deflectors on the front and rear snow shields can all be opened at 100°, and the second air deflectors at the air inlet through holes on the left and right sides of the body can all be opened at 100°.

[0088] Next, a control method for the air conditioner when it meets the low-temperature refrigeration condition is described. Since the range of T ao ≤ T1 is too large and covers a variety of different low-temperature refrigeration conditions, therefore, in order to prevent the indoor heat exchanger from frosting under these conditions, the methods to be adopted will also be different. Specifically, different low-temperature environments have different degrees of influence on the frosting of the indoor heat exchanger, which requires that when different strategies are adopted, different low-temperature refrigeration conditions must be fully considered. Among them, the low-temperature refrigeration conditions include T2 < T ao ≤ T1, T3 < T ao ≤ T2, and T ao ≤ T3.

[0089] The following describes the control method of the air conditioner with the low-temperature refrigeration condition of T2 < T ao ≤ T1.

[0090] In one embodiment, when the low-temperature refrigeration condition is T2 < T ao ≤ T1, and the preset pressure P includes the first preset pressure P1, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflectors based on the comparison result" further includes:

[0091] When P dWhen P1, adjust the opening degree of at least one first air deflector 22 to the first opening degree K1 and the opening degree of at least one second air deflector to the second opening degree K2;

[0092] wherein, T1 is the first preset temperature, T2 is the second preset temperature, 0° < min(K1, K2) < min(K max1 , K max2 ), max(K1, K2) ≤ max(K max1 , K max2 ), K max1 is the first maximum opening degree of the first air deflector, and K max2 is the second maximum opening degree of the second air deflector.

[0093] It should be noted that when the air conditioner is in the low-temperature refrigeration condition, the exhaust pressure of the compressor is relatively low. At this time, if the heat exchange efficiency of the outdoor heat exchanger is high, the indoor heat exchanger is prone to frosting. In order to ensure the normal operation of the air conditioner in the low-temperature refrigeration condition and avoid the problem of frosting on the indoor heat exchanger, the air circulation efficiency of the outdoor unit can be changed by adjusting the operation opening degrees of the first air deflector 22 and the second air deflector, and the heat exchange efficiency of the outdoor heat exchanger can be reduced. During the process of adjusting the opening degrees of the first air deflector 22 and the second air deflector, the first opening degree can be greater than the second opening degree, can be less than the second opening degree, or can also be equal to the first opening degree, as long as the frosting of the indoor heat exchanger can be avoided.

[0094] For example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, the first opening degree K1 as 45°, and the second opening degree K2 as the second maximum opening degree K max2 , K max2 as 90°, and the top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, and the front, rear, left, and right sides are respectively provided with air inlet through holes covering the second snow shield for illustration. When -15°C < T ao ≤ -5°C, it indicates that the air conditioner meets the conditions of low-temperature refrigeration. At this time, if P d < 0.8 MPa, it can be considered that when the heat exchange capacity of the outdoor heat exchanger is relatively strong, the indoor heat exchanger is prone to frosting, thus affecting the refrigeration performance of the air conditioner. Therefore, it is necessary to adjust the air circulation efficiency of the outdoor unit to reduce the heat exchange efficiency of the outdoor heat exchanger, that is, control the first air deflector 22 on the first snow shield 2 to open at 45°, and the second air deflectors on the front, rear, left, and right snow shields to open at 90° respectively. After the first air deflector 22 and the second air deflector are opened at the above angles, the frosting of the indoor heat exchanger can be avoided, and the normal operation of the air conditioner in the low-temperature refrigeration condition can be ensured.

[0095] For another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, and the first opening degree K1 as the first maximum opening degree K max1 , K max1 being 90°, and the second opening degree K2 being 45°, the air outlet through hole covering the first snow shield 2 is arranged at the top of the body 1, and the air inlet through hole covering the second snow shield is arranged on the left side for illustration. When -15°C < T ao ≤ -5°C and P d < 0.8 MPa, the first air guiding plate 22 on the first snow shield 2 can be controlled to open at 90°, and the second air guiding plate on the left snow shield 3 can be controlled to open at 45°, which can avoid frosting of the indoor heat exchanger and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0096] For another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, both the first opening degree K1 and the second opening degree K2 being 45°, the air outlet through hole covering the first snow shield 2 is arranged at the top of the body 1, the air inlet through hole covering the second snow shield is arranged at the front side, and the air inlet through hole not covered by the second snow shield is arranged at the rear side for illustration. When P d < 0.8 MPa and -15°C < T ao ≤ -5°C, the first air guiding plate 22 on the first snow shield 2 can be controlled to open at 45°, the second air guiding plate on the front snow shield 6 can be controlled to open at 45°, and the second air guiding plate on the air inlet through hole at the rear side of the body 1 can be controlled to open at 45°, which can reduce the air circulation efficiency of the outdoor unit, so as to avoid frosting of the indoor heat exchanger while ensuring the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0097] For another example, taking the first preset pressure P1 as 0.8 MPa, the first opening degree K1 as 45°, and the second opening degree K2 as the second maximum opening degree K max2 , K max2 being 90°, the air outlet through hole covering the first snow shield 2 is arranged at the top of the body 1, the air outlet through hole not covered by the first snow shield 2 is arranged on the left side, and the air inlet through holes covering the second snow shield are respectively arranged at the front and rear sides for illustration. When P d < 0.8 MPa and -15°C < T ao ≤ -5°C, the first air guiding plate 22 on the first snow shield 2 at the top of the body 1 can be controlled to open at 45°, the second air guiding plate on the front snow shield 6 can be controlled to open at 90°, and the first air guiding plate 22 at the air outlet through hole on the left side of the body 1 and the second air guiding plate at the air inlet through hole at the rear side are both kept in the closed state, which can improve the refrigeration efficiency of the air conditioner while avoiding frosting of the indoor heat exchanger.

[0098] Further, when the preset pressure P further includes a second preset pressure P2, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflector based on the comparison result" further includes:

[0099] When P1 ≤ P d < P2, the opening degree of at least one first air deflector 22 is adjusted to a third opening degree K3 and the opening degree of at least one second air deflector is adjusted to a fourth opening degree K4;

[0100] Wherein, min(K max1 , K max2 ) > min(K3, K4) ≥ min(K1, K2), and max(K max1 , K max2 ) ≥ max(K3, K4) ≥ max(K1, K2).

[0101] It should be noted that when the air conditioner is in the low-temperature refrigeration condition and the exhaust pressure of the compressor is relatively high, by appropriately increasing the heat exchange efficiency of the outdoor heat exchanger, frosting on the indoor heat exchanger will not occur. Therefore, the opening degrees of the first air deflector 22 and the second air deflector can be adjusted respectively to increase the air circulation efficiency of the outdoor unit, ensuring the normal operation of the air conditioner under the low-temperature refrigeration condition while avoiding frosting on the indoor heat exchanger. Among them, the adjustment method of the opening degrees of the first air deflector 22 and the second air deflector can be that, while keeping the third opening degree the same as the first opening degree, the fourth opening degree is greater than the second opening degree; or, while keeping the fourth opening degree the same as the second opening degree, the third opening degree is greater than the first opening degree; or, when the third opening degree is greater than the first opening degree, the fourth opening degree is greater than the second opening degree.

[0102] For example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, the second preset pressure P2 as 1.2 MPa, the first opening degree K1 as 45°, the second opening degrees K2 of the four second air deflectors are all the second maximum opening degree K max2 , the third opening degree K3 as 60°, the fourth opening degree K4 as the second maximum opening degree K max2 , K max2 being 90°, and the top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, and the front, rear, left, and right sides are respectively provided with air inlet through holes covering the second snow shield for illustration. When -15°C < T ao ≤ -5°C, it indicates that the air conditioner meets the low-temperature refrigeration condition. At this time, if 0.8 MPa ≤ P d< 1.2 MPa indicates that the exhaust pressure of the compressor is relatively high. In this case, by appropriately increasing the air circulation efficiency of the outdoor unit, the refrigeration performance of the air conditioner can be enhanced, and frosting will not occur on the indoor heat exchanger. Specifically, the first air deflector 22 on the first snow shield 2 can be controlled to open at 60°, and the second air deflectors on the front, rear, left, and right snow shields are all opened at 90°, aiming to increase the refrigeration efficiency of the air conditioner, avoid frosting on the indoor heat exchanger, and ensure its normal operation under low-temperature refrigeration conditions.

[0103] For another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, the second preset pressure P2 as 1.2 MPa, the first opening degree K1 and the third opening degree K3 are both the first maximum opening degree K max1 , K max1 is 90°, the second opening degree K2 is 45°, the fourth opening degree K4 is 60°, and the top of the body 1 is provided with an air outlet through hole covering the first snow shield 2 and the left side is provided with an air inlet through hole covering the second snow shield for illustration. When -15°C < T ao ≤ -5°C and 0.8 MPa ≤ P d < 1.2 MPa, by controlling the first air deflector 22 on the first snow shield 2 to open at 90° and the second air deflector on the left snow shield 3 to open at 60°, the refrigeration efficiency of the air conditioner can be increased, and frosting on the indoor heat exchanger can be avoided, ensuring its normal operation under low-temperature refrigeration conditions.

[0104] For another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, the second preset pressure P2 as 1.2 MPa, the first opening degree K1 is 45°, the second opening degrees K2 of the second air deflectors on the front and rear snow shields are both 45°, the third opening degree K3 and the fourth opening degree K4 are both 60°, and the top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, the front side is provided with an air inlet through hole covering the second snow shield, and the rear side is provided with an air inlet through hole not covering the second snow shield for illustration. When -15°C < T ao ≤ -5°C and 0.8 MPa ≤ P d < 1.2 MPa, by controlling the first air deflector 22 on the first snow shield 2 to open at 60°, the second air deflector on the front snow shield 6 to open at 60°, and the second air deflector at the rear air inlet through hole of the body 1 to open at 60°, the refrigeration efficiency of the air conditioner can be increased, and frosting on the indoor heat exchanger can be avoided, ensuring its normal operation under low-temperature refrigeration conditions.

[0105] For another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the first preset pressure P1 as 0.8 MPa, the second preset pressure P2 as 1.2 MPa, the first opening degree K1 of the first air deflector 22 located at the top of the body 1 as 45°, and the second opening degree K2 of the second air deflector on the front snow shield 6 as the second maximum opening degree K max2 , the third opening degree K2 is 60°, the fourth opening degree K4 is the second maximum opening degree K max2 , K max2 is 90°. The air outlet through holes covered by the first snow shield 2 at the top of the body 1, the air outlet through holes not covered by the first snow shield 2 on the left side, the air inlet through holes covered by the second snow shield on the front side, and the air inlet through holes not covered by the second snow shield on the rear side are described. When -15°C < T ao ≤ -5°C and 0.8 MPa ≤ P d < 1.2 MPa, it is possible to control the first air deflector 22 on the first snow shield 2 at the top of the body 1 to open at 60°, the second air deflector on the front snow shield 6 to open at 90°, and the first air deflector 22 at the air outlet through hole on the left side of the body 1 and the second air deflector at the air inlet through hole on the rear side to remain closed. This can improve the refrigeration efficiency of the air conditioner while preventing the indoor heat exchanger from frosting.

[0106] Furthermore, the control method further includes:

[0107] When P d ≥ P2, the opening degree of at least one first air deflector 22 is adjusted to the first maximum opening degree K max1 and the opening degree of at least one second air deflector is adjusted to the second maximum opening degree K max2 .

[0108] It should be noted that when the exhaust pressure of the compressor is high enough, when the air conditioner cools in an environment where T2 < T ao ≤ T1, the indoor heat exchanger is not prone to frosting. Therefore, the opening degrees of at least one first air deflector 22 and at least one second air deflector can be adjusted to their respective maximum opening degrees to fully exert the refrigeration efficiency of the air conditioner and ensure that the indoor temperature can be quickly reduced, providing a comfortable indoor environment for users.

[0109] For example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the second preset pressure P2 as 1.2 MPa, the third opening degree K3 as 60°, and the fourth opening degrees K4 of the four second air deflectors are all the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 90°. The air outlet through holes covered by the first snow shield 2 are provided at the top of the body 1, and the air inlet through holes covered by the second snow shield are provided on the front, rear, left, and right sides respectively for illustration. When -15°C < Tao ≤ -5°C indicates that the air conditioner meets the conditions for low-temperature refrigeration. If P d ≥ 1.2 MPa, it indicates that the exhaust pressure of the compressor is high. At this time, frosting is not likely to occur on the indoor heat exchanger. To improve the refrigeration efficiency and ensure the stable operation of the air conditioner under low-temperature refrigeration conditions, the first air deflector 22 on the first snow shield 2 can be controlled to open at 90°, and the second air deflectors on the front snow shield 6, rear snow shield 5, left snow shield 3, and right snow shield 4 can all be controlled to open at 90°.

[0110] For example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the second preset pressure P2 as 1.2 MPa, the third opening degree K3 as 60°, and the fourth opening degree K4 of the second air deflectors on the front and rear snow shields as the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 100°, and there is an air outlet through hole on the top of the body 1 that covers the first snow shield 2, and air inlet through holes that cover the second snow shields are respectively provided on the front, rear, left, and right sides for illustration. When -15°C < T ao ≤ -5°C, and P d ≥ 1.2 MPa, the first air deflector 22 on the first snow shield 2 can be controlled to open at 100°, the second air deflectors on the front snow shield 6 and rear snow shield 5 can be controlled to open at 90°, and the second air deflectors on the left snow shield 3 and right snow shield 4 can be kept closed. This can also improve the refrigeration efficiency of the air conditioner while avoiding frosting on the indoor heat exchanger.

[0111] Another example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the second preset pressure P2 as 1.2 MPa, the third opening degree K1 of the first air deflector 22 located on the top of the body 1 as 60°, and the fourth opening degree K4 of the second air deflector on the front snow shield 6 as the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 100°, and there is an air outlet through hole on the top of the body 1 that covers the first snow shield 2, an air outlet through hole that covers the first snow shield 2 is provided on the left side, and air inlet through holes that cover the second snow shields are respectively provided on the front and rear sides for illustration. When -15°C < T ao ≤ -5°C, and P d ≥ 1.2 MPa, the first air deflector 22 on the first snow shield 2 on the top of the body 1 can be controlled to open at 90°, the second air deflector on the front snow shield 6 can be controlled to open at 90°, and the first air deflector 22 on the first snow shield 2 and the second air deflector on the rear snow shield 5 can both be kept closed. This can improve the refrigeration efficiency of the air conditioner while avoiding frosting on the indoor heat exchanger.

[0112] The following describes the control method of the air conditioner under the condition that the low-temperature refrigeration condition is T3 < T ao ≤ T2.

[0113] In one embodiment, when the low-temperature refrigeration condition is T3 < T ao ≤ T2 and the preset pressure P further includes a third preset pressure P3, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflector based on the comparison result" further includes:

[0114] When P d < P3, the opening degree of at least one first air deflector 22 is adjusted to a fifth opening degree K5 and the opening degree of at least one second air deflector is adjusted to a sixth opening degree K6;

[0115] Wherein, T3 is the third preset temperature, 0 < min(K5, K6) ≤ min(K1, K2), and max(K5, K6) ≤ max(K1, K2).

[0116] It should be noted that when the air conditioner performs refrigeration under the condition that the outdoor ambient temperature is T3 < T ao ≤ T2, since the above-mentioned outdoor ambient temperature is lower than T2 < T ao ≤ T1, the indoor heat exchanger is more likely to frost. Therefore, it is necessary to adjust the opening degrees of the first air deflector 22 and the second air deflector to further reduce the air circulation efficiency of the outdoor unit while reducing the heat exchange capacity of the outdoor heat exchanger.

[0117] In addition, the third preset pressure can be equal to the first preset pressure, or greater than or less than the first preset pressure, and the specific magnitude relationship can be set by itself.

[0118] For example, taking the first preset temperature T1 as -5°C, the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the first opening degree K1 as 45°, the second opening degrees K2 of the four second air deflectors are all the second maximum opening degree K max2 , the fifth opening degree K5 as 30°, the sixth opening degree K6 as the second maximum opening degree K max2 , K max2 as 90°, and the air outlet through hole covering the first snow shield 2 is provided at the top of the body 1, and the air inlet through holes covering the second snow shields are respectively provided at the front, rear, left, and right sides for illustration. When P d < 0.8 MPa, it can be considered that the indoor heat exchanger is under the condition that the outdoor ambient temperature is -25°C < T ao ≤ -15°C, compared with the outdoor ambient temperature of -15°C < T aoThe phenomenon of frosting is more likely to occur under the condition of ≤ -5°C, which affects the refrigeration performance of the air conditioner. Therefore, it is necessary to further reduce the air circulation efficiency of the outdoor unit and the heat exchange efficiency of the outdoor heat exchanger. That is, the first air deflector 22 on the first snow shield 2 can be controlled to open at 30°, the second air deflectors on the left and right snow shields can be opened at 90°, and the second air deflectors on the front and rear snow shields can be kept closed, so as to reduce the heat exchange capacity of the outdoor heat exchanger, avoid frosting of the indoor heat exchanger, and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0119] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the first opening degree K1 and the fifth opening degree K5 are both the first maximum opening degree K max1 , K max1 is 90°, the second opening degree K2 is 45°, the sixth opening degree K6 is 30°, and the air outlet through hole covering the first snow shield 2 is provided at the top of the body 1, and the air inlet through hole covering the second snow shield is provided on the left side for illustration. When P d < 0.8 MPa and -25°C < T ao ≤ -15°C, the first air deflector 22 on the first snow shield 2 can be controlled to open at 90° and the second air deflector on the left snow shield 3 can be opened at 30°, so as to reduce the heat exchange capacity of the outdoor heat exchanger and avoid frosting of the indoor heat exchanger.

[0120] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the first opening degree K1 is 45°, the second opening degree K2 of the second air deflectors on both snow shields is 45°, the fifth opening degree K5 is 30°, the sixth opening degree K6 is 30°, the air outlet through hole covering the first snow shield 2 is provided at the top of the body 1, the air inlet through hole covering the second snow shield is provided at the front side, and the air inlet through hole not covering the second snow shield is provided at the rear side for illustration. When P d < 0.8 MPa and -25°C < T ao ≤ -15°C, the first air deflector 22 on the first snow shield 2, the second air deflector on the front snow shield 6 can be controlled to open at 30°, and the second air deflector at the rear air inlet through hole can be opened at 30°, so as to reduce the heat exchange capacity of the outdoor heat exchanger and avoid frosting of the indoor heat exchanger.

[0121] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the first opening degree K1 of the first air deflector 22 located at the top of the body 1 is 45°, the second opening degree K2 of the second air deflector on the front snow shield 6 is the second maximum opening degree K max , the fifth opening degree K5 is 30°, the sixth opening degree K6 is the second maximum opening degree Kmax , K max is 90°, the top of the body 1 is provided with an air outlet through hole covered with the first snow shield 2, the left side is provided with an air outlet through hole not covered with the first snow shield 2, the front side is provided with an air inlet through hole covered with the second snow shield, and the rear side is provided with an air inlet through hole not covered with the second snow shield for explanation. When P d < 0.8 MPa and -25°C < T ao ≤ -15°C, the first air deflector 22 on the first snow shield 2 at the top of the body 1 can be controlled to open at 30°, the second air deflector on the front snow shield 6 can be controlled to open at 90°, and the first air deflector 22 at the air outlet through hole on the left side of the body 1 and the second air deflector at the air inlet through hole on the rear side of the body are both kept in the closed state, so as to reduce the heat exchange capacity of the outdoor heat exchanger and avoid frosting of the indoor heat exchanger.

[0122] Furthermore, when the preset pressure P further includes a fourth preset pressure P4, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflector based on the comparison result" further includes:

[0123] When P3 ≤ P d < P4, the opening degree of at least one first air deflector 22 is adjusted to the seventh opening degree K7 and the opening degree of at least one second air deflector is adjusted to the eighth opening degree K8;

[0124] Among them, min(K max1 , K max2 ) > min(K7, K8) ≥ min(K5, K6), and max(K max1 , K max2 ) ≥ max(K7, K8) ≥ max(K5, K6).

[0125] It should be noted that the fourth preset pressure can be the same as or different from the second preset pressure, and the specific magnitude relationship can be set by itself.

[0126] For example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the fifth opening degree K5 as 30°, the sixth opening degree K6 of the second air deflector on the left and right snow shields as the second maximum opening degree K max2 , the seventh opening degree K7 as 45°, the eighth opening degree K8 as the second maximum opening degree K max2 , K max2 is 90°, the top of the body 1 is provided with an air outlet through hole covered with the first snow shield 2, and the front, rear, left, and right sides are respectively provided with air inlet through holes covered with the second snow shield for explanation. When the air conditioner is refrigerating under the condition that the outdoor ambient temperature is -25°C ≤ P d < -15°C, if the exhaust pressure of the compressor is 0.8 MPa ≤ Pd <1.2 MPa indicates that the exhaust pressure of the compressor is relatively high. In this case, by appropriately increasing the air circulation efficiency of the outdoor unit, the refrigeration performance of the air conditioner can be enhanced, and frosting does not occur on the indoor heat exchanger. Specifically, the first air deflector 22 on the first snow shield 2 can be controlled to open at 45°, the second air deflectors on the left and right snow shields can both open at 90°, and the second air deflectors on the front and rear snow shields remain in a state of closing the corresponding air inlets 71, aiming to increase the refrigeration efficiency of the air conditioner, while avoiding frosting on the indoor heat exchanger and ensuring its normal operation under low-temperature refrigeration conditions.

[0127] For another example, taking the second preset temperature T2 as -15 °C, the third preset temperature T3 as -25 °C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, and the fifth opening degree K5 as the first maximum opening degree K max1 , the sixth opening degree K6 of the second air deflector on the left snow shield 3 is 30°, and the seventh opening degree K7 is the first maximum opening degree K max1 , the eighth opening degree K8 is 45°, and K max1 is 90°. The top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, and the left side is provided with an air inlet through hole covering the second snow shield for illustration. When -25 °C ≤ P d < -15 °C and 0.8 MPa ≤ P d < 1.2 MPa, control the first air deflector 22 on the first snow shield 2 to open at 90°, and the second air deflector on the left snow shield 3 to open at 45°, which can avoid frosting on the indoor heat exchanger and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0128] For another example, taking the second preset temperature T2 as -15 °C, the third preset temperature T3 as -25 °C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the fifth opening degree K5 as 30°, the sixth opening degree K6 of the second air deflectors on the front and rear snow shields is 30°, and the seventh opening degree K7 and the eighth opening degree K8 are 45°. The top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, and the front and rear sides are respectively provided with air inlet through holes covering the second snow shields for illustration. When -25 °C ≤ P d < -15 °C and 0.8 MPa ≤ P d < 1.2 MPa, the first air deflector 22 on the first snow shield 2 can be controlled to open at 45°, and the second air deflectors on the front and rear snow shields can both open at 45°, which can avoid frosting on the indoor heat exchanger and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0129] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the fifth opening degree K1 of the first air deflector 22 located at the top of the machine body 1 as 30°, and the sixth opening degree K6 of the second air deflector on the front snow shield 6 as the maximum opening degree K max , the seventh opening degree K7 as 45°, the eighth opening degree K8 as the maximum opening degree K max2 , K max2 being 90°, the top of the machine body 1 is provided with an air outlet through hole covering the first snow shield 2, the left side is provided with an air outlet through hole not covering the first snow shield 2, the front side is provided with an air inlet through hole covering the second snow shield, and the rear side is provided with an air inlet through hole not covering the second snow shield for illustration. When -25°C ≤ P d < -15°C and 0.8 MPa ≤ P d < 1.2 MPa, the first air deflector 22 on the first snow shield 2 at the top of the machine body 1 can be controlled to open at 45°, the second air deflector on the front snow shield 6 to open at 90°, and the first air deflector 22 at the air outlet through hole on the left side of the machine body 1 and the second air deflector at the air inlet through hole on the rear side to remain closed.

[0130] Furthermore, the control method further includes:

[0131] When P d ≥ P4, the opening degree of at least one first air deflector 22 is adjusted to the ninth opening degree K9 and the opening degree of at least one second air deflector is adjusted to the tenth opening degree K 10 ;

[0132] wherein, min(K max1 , K max2 ) > min(K9, K 10 ) ≥ min(K7, K8), and max(K max1 , K max2 ) ≥ max(K9, K 10 ) ≥ max(K7, K8).

[0133] For example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the seventh opening degree K7 as 45°, the eighth opening degree K8 of the second air deflector on the left and right snow shields as the second maximum opening degree K max2 , the ninth opening degree K9 as 60°, the tenth opening degree K 10 being the second maximum opening degree K max2 , K max2is 90°. An air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, and air inlet through holes for covering the second snow shields are respectively provided at the front, rear, left, and right sides for description. When the air conditioner operates in refrigeration under the condition that the outdoor ambient temperature is -25°C ≤ P d < -15°C, if the discharge pressure of the compressor is under the condition of P d ≥ 1.2 MPa, compared with 0.8 MPa ≤ P d < 1.2 MPa, the indoor heat exchanger is not likely to frost. Specifically, the first air deflector 22 on the first snow shield 2 can be controlled to open at 60°, the second air deflectors on the left and right snow shields can be opened at 90°, and the second air deflectors on the front and rear snow shields can be kept in a state of closing the corresponding air inlets 71, which can improve the refrigeration capacity of the air conditioner while avoiding frosting of the indoor heat exchanger and ensuring the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0134] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the seventh opening degree K7 as the maximum opening degree K max1 , the eighth opening degree K8 as 45°, the ninth opening degree K9 as the maximum opening degree K max1 , the tenth opening degree K 10 as 60°, K max1 as 90°, an air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1 and an air inlet through hole for covering the second snow shield is provided on the left side for description. When -25°C ≤ P d < -15°C and P d ≥ 1 MPa, control the first air deflector 22 on the first snow shield 2 to open at 90°, and the second air deflector on the left snow shield 3 to open at 60°, which can avoid frosting of the indoor heat exchanger and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0135] For another example, taking the second preset temperature T2 as -15°C, the third preset temperature T3 as -25°C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the seventh opening degree K7 as 45°, the eighth opening degrees K8 of the two second air deflectors are both 45°, the ninth opening degree K9 as 60°, the tenth opening degree K 10 as 60°, an air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, an air inlet through hole for covering the second snow shield is provided at the front, and an air inlet through hole without covering the second snow shield is provided at the rear for description. When -25°C ≤ P d < -15°C and P dWhen the pressure is ≥ 1 MPa, the first air deflector 22 on the first snow shield 2, the second air deflector on the front snow shield 6 can be opened at 60°, and the second air deflector at the rear side air inlet through hole can be opened at 60°, which can avoid frosting of the indoor heat exchanger and ensure the normal operation of the air conditioner under low-temperature refrigeration conditions.

[0136] For another example, taking the second preset temperature T2 as -15 °C, the third preset temperature T3 as -25 °C, the third preset pressure P3 as 0.8 MPa, the fourth preset pressure P4 as 1.2 MPa, the seventh opening degree K7 of the first air deflector 22 located at the top of the body 1 is 45°, and the eighth opening degree K8 of the second air deflector on the front snow shield 6 is the maximum opening degree K max2 , the ninth opening degree K9 is 60°, and the tenth opening degree K 10 is the maximum opening degree K max2 , K max2 is 90°. The top of the body 1 is provided with an air outlet through hole covering the first snow shield 2, the left side is provided with an air outlet through hole not covering the first snow shield 2, the front side is provided with an air inlet through hole covering the second snow shield, and the rear side is provided with an air inlet through hole not covering the second snow shield for illustration. When -25 °C ≤ P d < -15 °C and P d ≥ 1 MPa, the first air deflector 22 on the first snow shield 2 at the top of the body 1 can be opened at 60°, the second air deflector on the front snow shield 6 can be opened at 90°, and the first air deflector 22 at the air outlet through hole on the left side of the body 1 and the second air deflector at the rear side air inlet through hole are both kept closed.

[0137] The following describes the control method of the air conditioner under the condition of low-temperature refrigeration with T ao ≤ T3.

[0138] In an implementation manner, when the low-temperature refrigeration condition is T ao ≤ T3 and the preset pressure includes the fifth preset pressure P5, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflector based on the comparison result" further includes:

[0139] When P d < P5, then control all the first air deflectors 22 to close the corresponding air outlets 23 and all the second air deflectors to close the corresponding air inlets 71;

[0140] Among them, P3 ≤ P5.

[0141] It should be noted that when the air conditioner is refrigerated under the condition of T ao ≤ T3, due to the too low outdoor ambient temperature, if the exhaust pressure of the compressor does not reach a certain height, no matter how the air circulation efficiency is reduced, frosting will occur on the indoor heat exchanger.

[0142] For example, taking the third preset temperature T3 as -25°C, the fifth preset pressure P5 as 1.2 MPa, the air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, and the air inlet through holes for covering the second snow shields are respectively provided at the front, rear, left, and right sides for illustration. When P d <1.2 MPa, it can be considered that under the condition that the outdoor ambient temperature is T ao ≤ -25°C, no matter how the opening degrees of the first air deflector 22 and the second air deflector are adjusted, frosting will occur on the indoor heat exchanger. At this time, it is possible to control the first air deflector 22 and the four second air deflectors to keep the corresponding air outlets 23 closed, so that the outdoor unit performs air internal circulation, thereby avoiding frosting of the indoor heat exchanger due to the entry of outdoor air.

[0143] Further, the step of "respectively adjusting the opening degrees of the first air deflector 22 and the second air deflector based on the comparison result" further includes:

[0144] When P d ≥ P5, then adjust the opening degree of at least one first air deflector 22 to the eleventh opening degree K 11 and the opening degree of at least the second air deflector to the twelfth opening degree K 12 ;

[0145] wherein, 0 ≤ min(K 11 , K 12 ) < min(K5, K6), and 0 ≤ max(K 11 , K 12 ) < max(K5, K6).

[0146] It should be noted that when the air conditioner performs refrigeration under the condition of T ao ≤ T3, when the exhaust pressure of the compressor is large enough, the air circulation efficiency of the outdoor unit can be appropriately increased, avoiding frosting of the indoor heat exchanger and improving the refrigeration effect of the air conditioner at the same time.

[0147] For example, taking the third preset temperature T3 as -25°C, the fifth preset pressure P5 as 1.2 MPa, the fifth opening degree K5 as 30°, the sixth opening degree K6 of the second air deflectors on the left and right snow shields as the maximum opening degree K max2 , K max2 as 90°, the eleventh opening degree K 11 as 0°, the twelfth opening degree K 12 as the minimum opening degree, that is, 10°, the air outlet through hole for covering the first snow shield 2 is provided at the top of the body 1, and the air inlet through holes for covering the second snow shields are respectively provided at the front, rear, left, and right sides for illustration. When P d ≥ 1.2 MPa, it can be considered that under the condition that the outdoor ambient temperature is T aoWhen the temperature is ≤ -25°C, the exhaust pressure of the compressor is high enough. At this time, the air circulation efficiency of the outdoor unit can be appropriately increased to improve the refrigeration efficiency of the air conditioner. Therefore, the second air deflector on the left and right snow guards can be controlled to open at 10°, and the second air deflectors on the front and rear snow guards and the first air deflector 22 on the first snow guard are all kept closed, so as to improve the refrigeration effect of the air conditioner while avoiding frosting on the indoor heat exchanger.

[0148] For another example, taking the third preset temperature T3 as -25°C, the fifth preset pressure P5 as 1.2 MPa, and the fifth opening degree K5 as the maximum opening degree K max1 , K max1 is 90°, the sixth opening degree K6 is 30°, the eleventh opening degree K 11 is the minimum opening degree, that is, 10°, the twelfth opening degree K 12 is 0°. The air outlet through hole covering the first snow guard 2 is provided at the top of the body 1, and the air inlet through hole covering the second snow guard is provided on the left side for illustration. When T ao ≤ -25°C and P d ≥ 1.2 MPa, by controlling the first air deflector 22 on the first snow guard 2 to open at 10°, and the second air deflector on the left snow guard 3 to keep the corresponding air inlet 71 closed, the heat exchange efficiency of the indoor heat exchanger can be increased, thereby improving the refrigeration efficiency of the air conditioner.

[0149] For another example, taking the third preset temperature T3 as -25°C, the fifth preset pressure P5 as 1.2 MPa, the fifth opening degree K5 as 30°, the sixth opening degree K6 of the second air deflectors on the front and rear snow guards as 30°, the eleventh opening degree K 11 is 10°, the twelfth opening degree K 12 is 10°. The air outlet through hole covering the first snow guard 2 is provided at the top of the body 1, the air outlet through hole not covering the first snow guard 2 is provided on the left side, the air inlet through hole covering the second snow guard is provided on the front side, and the air inlet through hole not covering the second snow guard is provided on the rear side for illustration. When T ao ≤ -25°C and P d ≥ 1.2 MPa, the first air deflector 22 on the first snow guard 2 and the second air deflector on the front snow guard 6 can be controlled to open at 10° on average, and the first air deflector 22 at the air outlet through hole on the left side of the body 1 and the second air deflector at the air inlet through hole on the rear side are both kept closed.

[0150] In one embodiment, in response to the start command of the heating mode, all the first air deflectors 22 are controlled to open at the first maximum opening degree K max1 and all the second air deflectors are controlled to open at the second maximum opening degree K max2 .

[0151] It should be noted that when the air conditioner operates in the heating mode, by opening the first air deflector 22 and the second air deflector at their respective maximum openings, the air circulation can be enhanced, the heating efficiency can be improved, and a more comfortable and warm environment can be provided for the user.

[0152] For example, taking the first maximum opening degree K max1 and the second maximum opening degree K max1均 as 90°, air intake through holes are respectively arranged on the front, rear, left, and right sides of the body 1. When the air conditioner operates in the heating mode, by controlling the first air deflector 22 and the second air deflectors on the front, rear, left, and right snow shields to open at 90°, a rapid heating effect can be achieved.

[0153] The following is a brief description of a possible operation process of the control method of the air conditioner of the present application in conjunction with Figure 6 a logical diagram of a possible implementation manner of the control method of the air conditioner of the present application. Figure 6 This is a logical diagram of a possible implementation manner of the control method of the air conditioner of the present application.

[0154] S201. When receiving a startup instruction, obtain the operating mode of the air conditioner, and then execute S202.

[0155] S202. Determine whether the operating mode is the cooling mode? If it is, execute S203; if not, execute S225.

[0156] S203. Control the first air deflector 22 and all the second air deflectors to remain in the closed state;

[0157] S204. Obtain the outdoor ambient temperature T ao and then execute S205.

[0158] S205. Determine whether T ao > -5°C holds? If it holds, execute S206; otherwise, execute S207.

[0159] S206. Control the first air deflector 22 and all the second air deflectors to open at 90°.

[0160] S207. Determine whether -5°C < T ao ≤ -15°C holds? If it holds, execute S208; otherwise, execute S214.

[0161] S208. Obtain the exhaust pressure P d of the compressor and then execute S209.

[0162] S209. Determine whether P d < 0.8MPa holds? If it holds, execute S210; otherwise, execute S211.

[0163] S210. Control the first air deflector 22 to open at 45°, and at the same time control all the second air deflectors to open at 90°.

[0164] S211. Determine whether 0.8 MPa ≤ P d <1.2 MPa holds. If it holds, execute S212; otherwise, execute S213.

[0165] S212. Control the first air deflector 22 to open at 60°, and at the same time control all the second air deflectors to open at 90°.

[0166] S213. Control the first air deflector 22 and all the second air deflectors to open at 90°.

[0167] S214. Determine whether -25°C < T ao ≤ -15°C holds. If it holds, execute S215; otherwise, execute S221.

[0168] S215. Obtain the discharge pressure P of the compressor d , and then execute S216.

[0169] S216. Determine whether P d <0.8 MPa holds. If it holds, execute S217; otherwise, execute S218.

[0170] S217. Control the first air deflector 22 to open at 30°, the second air deflectors on the left and right snow shields to open at 90°, and the second air deflectors on the front and rear snow shields to remain closed.

[0171] S218. Determine whether 0.8 MPa ≤ P d <1.2 MPa holds. If it holds, execute S219; otherwise, execute S220.

[0172] S219. Control the first air deflector 22 to open at 45°, the second air deflectors on the left and right snow shields to open at 90°, and the second air deflectors on the front and rear snow shields to remain closed.

[0173] S220. Control the first air deflector 22 to open at 60°, the second air deflectors on the left and right snow shields to open at 90°, and the second air deflectors on the front and rear snow shields to remain closed.

[0174] S221. Obtain the discharge pressure P of the compressor d , and then execute S222.

[0175] S222. Determine whether P d <1.2 MPa holds. If it holds, execute S223; otherwise, execute S224.

[0176] S223. Control the first air deflector 22 and all the second air deflectors to remain in the closed state.

[0177] S224. Control the second air deflectors on the left and right snow shields to open at 10°, and keep the first air deflector 22 and the remaining second air deflectors in the closed state.

[0178] S225. Control the first air deflector 22 and all the second air deflectors to open at 90°.

[0179] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.

[0180] So far, the technical solutions of this application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. Without departing from the principle of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of this application.

Claims

1. A control method for an air conditioner, characterized in that, The outdoor unit of the air conditioner includes a body having at least one air outlet through-hole and at least one air inlet through-hole, and a wind deflector group. At least one of the at least one air outlet through-holes is covered with a first snow shield having an air outlet, and at least one of the at least one air inlet through-holes is covered with a second snow shield having an air inlet. At least one of the second snow shields is in communication with at least one of the first snow shields; the wind deflector group includes a first wind deflector pivotally mounted at the air outlet and the other air outlet through-holes not covered with the first snow shield, and a second wind deflector pivotally mounted at the air inlet and the other air inlet through-holes not covered with the second snow shield; the control method includes: When the air conditioner operates in the cooling mode, obtain the outdoor ambient temperature T ao ; Based on the outdoor ambient temperature T ao , determine whether the air conditioner meets the low-temperature refrigeration condition; When the low-temperature refrigeration condition is satisfied, the exhaust pressure P of the compressor is obtained d ; Compare the exhaust pressure P d with the magnitude of the preset pressure P; Based on the comparison result, respectively adjust the opening degrees of the first wind deflector and the second wind deflector.

2. The control method according to claim 1, characterized in that, The low-temperature refrigeration condition is T2 < T ao ≤ T1, and when the preset pressure P includes a first preset pressure P1, the step of "respectively adjusting the opening degrees of the first air deflector and the second air deflector based on the comparison result" further includes: When P d <When P1, the opening degrees of at least one of the first air deflectors are adjusted to a first opening degree K1 and the opening degrees of at least one of the second air deflectors are adjusted to a second opening degree K2; wherein, T1 is the first preset temperature, T2 is the second preset temperature, 0° < min(K1, K2) < min(K max1 , K max2 ), max(K1, K2) ≤ max(K max1 , K max2 ), K max1 is the first maximum opening degree of the first air deflector, and K max2 is the second maximum opening degree of the second air deflector.

3. The control method according to claim 2, characterized in that, When the preset pressure P further includes a second preset pressure P2, the step of "Based on the comparison result, respectively adjust the opening degrees of the first wind deflector and the second wind deflector" further includes: When P1 ≤ P d <When P2, the opening degree of at least one of the first air guide plates is adjusted to a third opening degree K3 and the opening degree of at least one of the second air guide plates is adjusted to a fourth opening degree K4; where, min(K max1 , K max2 ) > min(K3, K4) ≥ min(K1, K2), and max(K max1 , K max2 ) ≥ max(K3, K4) ≥ max(K1, K2).

4. The control method according to claim 3, characterized in that, The control method further includes: When P d ≥ P2, the opening degree of at least one of the first air guide plates is adjusted to a first maximum opening degree K max1 and the opening degree of at least one of the second air guide plates is adjusted to a second maximum opening degree K max2 .

5. The control method according to claim 2, wherein The low-temperature refrigeration condition is T3 < T ao ≤ T2, and when the preset pressure P further includes a third preset pressure P3, the step of "respectively adjusting the opening degrees of the first air deflector and the second air deflector based on the comparison result" further includes: When P d <When P < P3, adjust the opening degree of at least one of the first air guide plates to a fifth opening degree K5 and the opening degree of at least one of the second air guide plates to a sixth opening degree K6; Wherein, T3 is a third preset temperature, 0 < min(K5, K6) ≤ min(K1, K2), and max(K5, K6) ≤ max(K1, K2).

6. The control method according to claim 5, wherein When the preset pressure P further includes a fourth preset pressure P4, the step of "Based on the comparison result, respectively adjust the opening degrees of the first wind deflector and the second wind deflector" further includes: When P3 ≤ P d <When P4, the opening degree of at least one of the first air guide plates is adjusted to a seventh opening degree K7 and the opening degree of at least one of the second air guide plates is adjusted to an eighth opening degree K8; where min(K max1 , K max2 ) > min(K7, K8) ≥ min(K5, K6), and max(K max1 , K max2 ) ≥ max(K7, K8) ≥ max(K5, K6).

7. The control method according to claim 6, characterized in that, The control method further includes: When P d ≥ P4, the opening degree of at least one of the first air guide plates is adjusted to the ninth opening degree K9 and the opening degree of at least one of the second air guide plates is adjusted to the tenth opening degree K 10 ; where, min(K max1 , K max2 ) > min(K9, K 10 ) ≥ min(K7, K8), and max(K max1 , K max2 ) ≥ max(K9, K 10 ) ≥ max(K7, K8).

8. The control method according to claim 5, wherein The low-temperature refrigeration condition is T ao ≤ T3, and when the preset pressure further includes a fifth preset pressure P5, the step of "respectively adjusting the opening degrees of the first air deflector and the second air deflector based on the comparison result" further includes: When P d <When P is less than 5, all of the first air guide plates are controlled to close the corresponding air outlets and all of the second air guide plates are controlled to close the corresponding air inlets; where P3 ≤ P5; and / or When P d ≥ P5, the opening degree of at least one of the first air guide plates is adjusted to the eleventh opening degree K 11 and the opening degree of at least the second air guide plate is adjusted to the twelfth opening degree K 12 ; where 0 ≤ min(K 11 , K 12 ) < min(K5, K6), and 0 ≤ max(K 11 , K 12 ) < max(K5, K6).

9. The control method according to claim 2, wherein The control method further includes: When T ao > T1, the opening degrees of all the first air guide plates are adjusted to the first maximum opening degree K max1 and the opening degrees of all the second air guide plates are adjusted to the second maximum opening degree K max2 .

10. The control method according to claim 1, characterized in that, "When the air conditioner operates in the cooling mode, obtain the outdoor ambient temperature T ao " The steps also include: In response to the start instruction of the refrigeration mode, control all the first wind deflectors and all the second wind deflectors to remain in the closed state; and / or The control method further includes: In response to the start instruction of the heating mode, control all the first air guide plates to open with a first maximum opening degree K max1 and all the second air guide plates to open with a second maximum opening degree K max2 open.

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