Control method for air conditioner

Abstract

The present invention relates to the technical field of air conditioners. Specifically provided is a control method for an air conditioner. The present application aims to solve the problems of how to effectively prevent an indoor heat exchanger from frosting and satisfy low-temperature cooling requirements of a user while reducing energy consumption. To this purpose, in the control method for an air conditioner in the present application, when an air conditioner meets a low-temperature cooling condition, the opening degrees of a first air deflector and a second air deflector are respectively adjusted on the basis of an exhaust pressure and a preset pressure. In this way, the air circulation efficiency of an outdoor unit can be adjusted, and the heat exchange efficiency of an outdoor heat exchanger is reduced, such that the outlet temperature of the outdoor heat exchanger is increased, and the evaporation temperature of an indoor heat exchanger is thus increased, thereby preventing the indoor heat exchanger from frosting, ensuring the normal operation of the air conditioner under a low-temperature cooling condition, satisfying the low-temperature cooling requirements of a user, and improving the operation reliability and the cooling operation range of the air conditioner. In addition, no additional heating apparatus is required, and the energy consumption is low.

Description

Control method of air conditioner

[0001] The present application claims priority to Chinese Patent Application No. 202411391129.X, filed on September 30, 2024, entitled "Control method of air conditioner", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of air conditioners, and specifically provides a control method of an air conditioner. BACKGROUND

[0003] Air conditioners have been widely used in millions of households, and their use is increasingly diverse, with more extensive requirements for their operating range. For example, in closed environments such as kitchens or machine rooms where it is inconvenient to open windows for ventilation, air conditioners need to operate in a low-temperature environment for refrigeration to maintain the temperature stability of the indoor environment. However, in low-temperature refrigeration operation, the air conditioner may face the following problems: the evaporation temperature of the indoor heat exchanger is too low, which causes the indoor heat exchanger to be prone to frosting, which not only weakens the refrigeration effect of the air conditioner, but also may cause incomplete evaporation of the refrigerant, causing liquid refrigerant to flow back to the compressor, thereby damaging the compressor.

[0004] To solve the problem of frosting of the indoor heat exchanger during low-temperature refrigeration operation of the air conditioner, the commonly used method is to add a heating device to the indoor unit to increase the evaporation temperature, thereby preventing the indoor heat exchanger from frosting, but this undoubtedly leads to an increase in energy consumption.

[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0006] To solve at least one problem in the prior art, i.e., to solve the problem of how to effectively prevent the indoor heat exchanger from frosting while reducing energy consumption and meeting the user's low-temperature refrigeration requirements. To this end, the present application provides a control method of an air conditioner, the outdoor unit of the air conditioner comprising a machine body having at least one air outlet through hole and at least one air inlet through hole, and a wind deflector set, at least one of the at least one air outlet through hole is covered with a first snow prevention cover having an air outlet, at least one of the at least one air inlet through hole is covered with a second snow prevention cover having an air inlet, at least one of the second snow prevention cover and at least one of the first snow prevention cover are in communication; the wind deflector set comprises a first wind deflector pivoted to the air outlet and the air outlet through hole which is not covered with the first snow prevention cover, and a second wind deflector pivoted to the air inlet and the air inlet through hole which is not covered with the second snow prevention cover; wherein n≥1, m≥1; the control method comprises:

[0007] When the air conditioner operates in a refrigeration mode, the outdoor environment temperature T ao is obtained.

[0008] based on the outdoor environment temperature T ao , determine whether the air conditioner meets low-temperature refrigeration conditions;

[0009] When the low-temperature refrigeration conditions are met, the exhaust pressure P d of the compressor is obtained;

[0010] The exhaust pressure P d is compared with a preset pressure P;

[0011] Based on the comparison result, the opening degree of the first air deflector and the second air deflector is adjusted respectively.

[0012] In the preferred technical solutions of the above control method, the low-temperature refrigeration conditions are T2<T ao ≤T1, and the preset pressure P includes a first preset pressure P1, and the step of "adjusting the opening degree of the first air deflector and the second air deflector based on the comparison result" further includes:

[0013] When P d <P1, the opening degree of at least one of the first air deflectors is adjusted to a first opening degree K1, and the opening degree of at least one of the second air deflectors is adjusted to a second opening degree K2;

[0014] 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 a first maximum opening degree of the first air deflector, and K max2 is a second maximum opening degree of the second air deflector.

[0015] In the preferred technical solutions of the above control method, the preset pressure P further includes a second preset pressure P2, and the step of "adjusting the opening degree of the first air deflector and the second air deflector based on the comparison result" further includes:

[0016] When P1≤P d <P2, the opening degree of at least one of the first air deflectors is adjusted to a third opening degree K3, and the opening degree of at least one of the second air deflectors is adjusted to a fourth opening degree K4;

[0017] Wherein, min(K max1 , K max2 )>min(K3, K4)≥min(K1, K2), and max(K max1 , K max2) ≥ max(K3, K4) ≥ max(K1, K2).

[0018] In the preferred technical solutions of the control method, the control method further comprises:

[0019] When P d ≥ P2, the opening degree of the at least one first deflector is adjusted to a first maximum opening degree K max1 and the opening degree of the at least one second deflector is adjusted to a second maximum opening degree K max2 .

[0020] In the preferred technical solutions of the control method, the low-temperature refrigeration condition is T3 < T ao ≤ T2, and when the preset pressure P further comprises a third preset pressure P3, the step of "adjusting the opening degrees of the first deflector and the second deflector respectively based on the comparison result" further comprises:

[0021] When P d < P3, the opening degree of the at least one first deflector is adjusted to a fifth opening degree K5 and the opening degree of the at least one second deflector is adjusted to a sixth opening degree K6;

[0022] Wherein, T3 is a third preset temperature, 0 < min(K5, K6) ≤ min(K1, K2), and max(K5, K6) ≤ max(K1, K2).

[0023] In the preferred technical solutions of the control method, when the preset pressure P further comprises a fourth preset pressure P4, the step of "adjusting the opening degrees of the first deflector and the second deflector respectively based on the comparison result" further comprises:

[0024] When P3 ≤ P d < P4, the opening degree of the at least one first deflector is adjusted to a seventh opening degree K7 and the opening degree of the at least one second deflector is adjusted to an eighth opening degree K8;

[0025] Wherein, min(K max1 , K max2 ) ≥ min(K7, K8) ≥ min(K5, K6), and max(K max1 , K max2 ) ≥ max(K7, K8) ≥ max(K5, K6).

[0026] In the preferred technical solutions of the control method, the control method further comprises:

[0027] When P d ≥ P4, the opening degree of the at least one first deflector is adjusted to a ninth opening degree K9 and the opening degree of the at least one second deflector is adjusted to a tenth opening degree K10 ;

[0028] 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).

[0029] In the preferred technical solution of the control method, the low-temperature refrigeration condition is T ao ≤T3, and when the preset pressure includes a fifth preset pressure P5, the step of “adjusting the opening degrees of the first guide vanes and the second guide vanes based on the comparison result” further includes:

[0030] When P d <P5, all the first guide vanes are controlled to close the corresponding air outlets, and all the second guide vanes are controlled to close the corresponding air inlets; wherein P3≤P5; and / or

[0031] When P d ≥P5, the opening degree of at least one of the first guide vanes is adjusted to an eleventh opening degree K 11 , and the opening degree of at least one of the second guide vanes is adjusted to a twelfth opening degree K 12 .

[0032] wherein 0≤min(K 11 , K 12 )<min(K5, K6), and 0≤max(K 11 , K 12 )<max(K5, K6).

[0033] In the preferred technical solution of the control method, the control method further includes:

[0034] When T ao >T1, the opening degrees of all the first guide vanes are adjusted to a first maximum opening degree K max1 , and the opening degrees of all the second guide vanes are adjusted to a second maximum opening degree K max2 .

[0035] In the preferred technical solution of the control method, before the step of “acquiring an outdoor environment temperature Tao when the air conditioner is running in a refrigeration mode”, the control method further includes:

[0036] In response to a start instruction of the refrigeration mode, all the first guide vanes and all the second guide vanes are controlled to remain in a closed state; and / or

[0037] The control method further comprises:

[0038] in response to a start instruction of the heating mode, controlling all the first air deflectors to be opened at a first maximum opening degree K max1 and all the second air deflectors to be opened at a second maximum opening degree K max2 .

[0039] The skilled in the art can understand that the control method of the air conditioner of the present application can 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 of the indoor heat exchanger, ensuring normal operation of the air conditioner under low-temperature refrigeration conditions, meeting the low-temperature refrigeration needs of the user, and improving the operation reliability and refrigeration operating range of the air conditioner, by adjusting the opening degrees of the first air deflectors and the second air deflectors according to the size of the discharge pressure and the preset pressure when the air conditioner meets the low-temperature refrigeration condition.

[0040] Further, by adjusting the opening degree of the first air deflectors to the first opening degree and the opening degree of the second air deflectors to the second opening degree when the outdoor ambient temperature is greater than the second preset temperature and less than or equal to the first preset temperature, and the discharge pressure is less than the first preset pressure, it is beneficial to slow down the air circulation efficiency, reduce 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, avoiding frosting of the indoor heat exchanger.

[0041] Still further, by adjusting the opening degree of at least one first air deflector to a third opening degree and the opening degree of the second air deflector to a fourth opening degree when the discharge pressure is greater than or equal to the first preset pressure and less than the second preset pressure, the indoor heat exchanger can be effectively prevented from frosting while the heat exchange efficiency of the outdoor heat exchanger and the refrigeration effect of the air conditioner are improved.

[0042] Still further, by controlling the opening degree of at least one first air deflector and at least one second air deflector to be the respective maximum opening degree when the discharge pressure is greater than or equal to the second preset pressure, the indoor heat exchanger can be effectively prevented from frosting while the refrigeration effect of the air conditioner is improved.

[0043] Further, by adjusting the opening degree of at least one first air deflector to a fifth opening degree and the opening degree of at least one second air deflector to a sixth opening degree when the outdoor ambient temperature is greater than a third preset temperature and less than or equal to the second preset temperature, and the discharge pressure is less than a third preset pressure, the indoor heat exchanger can be effectively prevented from frosting while the air conditioner is ensured to operate normally under low-temperature refrigeration conditions.

[0044] Further, in the case that 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 the at least one first air deflector to the seventh opening degree and adjusting the opening degree of the at least one second air deflector to the eighth opening degree, the cooling effect of the air conditioner can be improved while effectively preventing the indoor heat exchanger from frosting.

[0045] Further, in the case that the exhaust pressure is greater than or equal to the fourth preset pressure, by adjusting the opening degree of the at least one first air deflector to the ninth opening degree and adjusting the opening degree of the at least one second air deflector to the tenth opening degree, the cooling effect of the air conditioner can be improved while effectively preventing the indoor heat exchanger from frosting.

[0046] Further, in the case that the outdoor environment 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 is enabled to realize air internal circulation, thereby preventing the indoor heat exchanger from frosting. When the exhaust pressure is greater than the fifth preset pressure, by adjusting the opening degree of the at least one first air deflector to the eleventh opening degree and adjusting the opening degree of the at least one second air deflector to the twelfth opening degree, the cooling effect of the air conditioner can be improved while effectively preventing the indoor heat exchanger from frosting.

[0047] Further, in the case that the outdoor environment temperature is greater than the first preset temperature, by adjusting the opening degree of all the first air deflectors and the second air deflectors to the maximum opening degree respectively, the cooling effect of the air conditioner can be fully utilized to ensure that the indoor temperature can be rapidly reduced, thereby providing a comfortable indoor environment for the user.

[0048] Further, in response to the start instruction of the cooling mode, by controlling all the first air deflectors and all the second air deflectors to remain in the closed state, the problem of frosting of the indoor heat exchanger when the air conditioner is running in the cooling mode in a low-temperature environment can be effectively avoided. In addition, in response to the start instruction of the heating mode, by controlling all the first air deflectors and all the second air deflectors to be opened at the maximum opening degree respectively, the heating effect of the air conditioner can be fully utilized to ensure that the indoor temperature can be rapidly increased, thereby providing a warm and comfortable indoor environment for the user. BRIEF DESCRIPTION OF DRAWINGS

[0049] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0050] Fig. 1 is a flow chart of the control method of the air conditioner of the present application;

[0051] Fig. 2 is a structural diagram of the outdoor unit of the present application;

[0052] Fig. 3 is a front view of the outdoor unit of the present application;

[0053] Fig. 4 is a structural diagram of the first snow cover of the present application;

[0054] Fig. 5 is a structural diagram of the first snow cover of the present application from another angle;

[0055] Fig. 6 is a logic diagram of one possible implementation of the control method of the air conditioner of the present application.

[0056] Explanation of reference signs:

[0057] 1, machine body; 2, first snow cover; 21, first connecting hole; 22, first air deflector; 23, air outlet; 3, left snow cover; 4, right snow cover; 5, rear snow cover; 51, second connecting hole; 6, front snow cover; 71, air inlet; 8, connecting pipe. DETAILED DESCRIPTION

[0058] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0059] It should be noted that in the description of the present application, the terms "upper", "lower", "inner", "bottom", "end" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the 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 cannot be understood as a limitation on the present application.

[0060] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "connected", "communicated" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] The control method of the air conditioner of the present application will be described in conjunction with Figs. 1-6.

[0062] As shown in FIGS. 2-5, the air conditioner of the present application comprises an outdoor unit, the outdoor unit of the air conditioner comprises a machine body 1 having at least one air outlet through hole and at least one air inlet through hole, and a set of air deflectors, at least one of the at least one air outlet through hole is covered with a first snow prevention cover 2 having an air outlet 23, at least one of the at least one air inlet through hole is covered with a second snow prevention cover having an air inlet 71, and at least one second snow prevention cover is in communication with at least one snow prevention cover 2. The set of air deflectors comprises a first air deflector 22 pivoted at the air outlet 23 and the air outlet through hole which is not covered with the first snow prevention cover 2, and a second air deflector pivoted at the air inlet 71 and the air inlet through hole which is not covered with the second snow prevention cover. In the above arrangement, the air circulation speed of the outdoor unit can be adjusted by controlling the opening degree of the first air deflector 22 and the second air deflector, and then the heat exchanger capacity of the outdoor heat exchanger is adjusted, so as to ensure the normal operation of the air conditioner in low-temperature refrigeration working condition while avoiding frosting of the indoor heat exchanger. In addition, by connecting the first snow prevention cover 2 with the second snow prevention cover, when the air inlet 71 and the air outlet 23 are both closed by the corresponding air deflectors, the outdoor unit can realize air internal circulation, so as to increase the outlet temperature of the outdoor heat exchanger, thereby increasing the evaporation temperature of the indoor heat exchanger, and effectively avoiding frosting of the outdoor heat exchanger. When the first air deflector 22 and the second air deflector are in the closed state, dust and foreign matters can be effectively blocked from entering the outdoor unit. In addition, the first snow prevention cover 2 and the second snow prevention cover can effectively block snowflakes from directly entering the air inlet 71 and the air outlet 23 of the outdoor unit, and avoid air flow obstruction caused by accumulated snow.

[0063] Next, referring to FIGS. 2-4, the top of the machine body 1 is provided with an air outlet through hole, the machine body 1 at the air outlet through hole is covered with the first snow prevention cover 2, the side wall of the first snow prevention cover 2 is provided with the air outlet 23, and the first air deflector 22 is pivoted at the air outlet 23. The first air deflector 22 can open or close the air outlet 23 during rotation.

[0064] It should be noted that the present application does not limit the way in which the first air deflector 22 opens or closes the air outlet 23, as long as the first air deflector 22 can open or close the air outlet 23 during rotation. For example, a first stepper motor is arranged on the outer wall of the first snow prevention cover 2 at the air outlet 23, and the first air deflector 22 is driven to rotate by the first stepper motor, so that the first stepper motor can realize accurate control of the opening degree of the first air deflector 22 by adjusting the number of rotations thereof.

[0065] Of course, the application does not fix the setting position and the number of the air outlet holes, and those skilled in the art can adjust them according to the needs. For example, the air outlet 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 holes can also be 2 or other numbers. For example, when the number of the air outlet holes is 2, one air outlet hole can be arranged on the top of the machine body 1, and the other air outlet hole can be arranged on the front side of the machine body 1. At this time, the first snow cover 2 can be arranged on the machine body 1 at both air outlet holes, and the first air deflector can be arranged on both first snow covers 2, or the first snow cover 2 can be arranged on the air outlet hole on the top of the machine body 1, the first snow cover 2 is not arranged on the air outlet hole on the front side of the machine body 1, and the first air deflector 22 can be arranged on the air outlet hole on the front side of the machine body 1 and the air inlet of the first snow cover 2.

[0066] Next, referring to FIGS. 2-4, four air inlet holes are arranged on the machine body 1, and the four air inlet holes are arranged on the front side, rear side, left side and right side of the machine body 1, respectively. Correspondingly, the second snow cover is arranged on the air inlet hole on the front side, rear side, left side and right side. The bottom of the four second snow covers is provided with an air inlet 71, so as to prevent snow from accumulating in the air inlet 71 and ensure normal ventilation of the outdoor unit. The air inlet 71 of the four second snow covers is provided with a second air deflector, and the second air deflector is pivoted to the air inlet 71, so that the second air deflector can open or close the air inlet 71 during rotation.

[0067] It should be noted that in order to distinguish the four second snow covers, the four second snow covers are named as the front snow cover 6, rear snow cover 5, left snow cover 3 and right snow cover 4 in sequence according to their positions on the machine body 1. In addition, the application does not limit the structure of the four second snow covers, as long as it can avoid snow accumulation, such as the top of the second snow cover being arranged as an inclined downward structure.

[0068] In addition, it should be noted that the application does not limit the way in which the second air deflector opens or closes the air inlet 71, as long as the second air deflector can open or close the air inlet 71 during rotation. For example, the outer wall of the second snow cover of each air inlet 71 is provided with a second stepper motor, and the second air deflector is driven to rotate by the second stepper motor, so that the second stepper motor can realize accurate control of the opening degree of the second air deflector by adjusting the number of rotations thereof.

[0069] Of course, the number of air inlet through holes provided on the machine body 1 is not fixed in the present application, and those skilled in the art can adjust it according to the specific application scenario. For example, the number of air inlet through holes can also be 1, that is, only one air inlet through hole can be provided on the front side, rear side, left side or right side of the machine body. Or the number of air inlet through holes can also be 2, that is, air inlet through holes can be provided on the front side and rear side of the machine body, or air inlet through holes can be provided on the left side and right side of the machine body. It should be noted that when one air inlet through hole is provided on the machine body 1, a second snow cover is provided on the machine body 1 at the air inlet through hole, and a second air deflector is provided on the second snow cover. When two or more air inlet through holes are provided on the machine body, a second snow cover can be provided on the machine body 1 at all air inlet through holes, or a second snow cover can be provided at a part of the air inlet through holes, and the remaining air inlet through holes are not provided with a second snow cover. At this time, the air inlet of the second snow cover and the air outlet of the air inlet through hole not provided with the second snow cover are provided with a second air deflector.

[0070] Next, referring to FIG. 5, four first connection holes 21 are provided on the first snow cover 2, and each of the four second snow covers is provided with a second connection hole 51. The four first connection holes 21 correspond to the four second connection holes 51 on the four second snow covers respectively, and are connected by the connecting pipe 8, so that the first snow cover 2 can be connected to the four second snow covers respectively. When the air inlet 71 and the air outlet 23 are closed by the corresponding air deflectors, the outdoor unit can realize air circulation, so that the outlet temperature of the outdoor heat exchanger increases, thereby improving the evaporation temperature of the indoor heat exchanger, and effectively preventing the outdoor heat exchanger from frosting.

[0071] It should be noted that the number of first connection holes 21 on the first snow cover 2 can correspond to the number of second snow covers, that is, when only one second snow cover is provided on the machine body 1, only one first connection hole 21 is provided on the first snow cover 2, which is connected to the second connection hole 51 on the second snow cover. Alternatively, the number of first connection holes 21 on the first snow cover 2 can not correspond to the number of second snow covers, as long as one first snow cover 2 and one second snow cover are connected.

[0072] As shown in FIG. 1, based on the above setting mode, the control method of the air conditioner of the present application comprises:

[0073] S101, acquiring the outdoor environment temperature T ao For example, the outdoor environment temperature is acquired by providing a temperature sensor on the outdoor unit.

[0074] S102, based on the outdoor environment temperature T aodetermining whether the air conditioner meets the low-temperature refrigeration condition. For example, after obtaining the outdoor ambient temperature, whether the air conditioner meets the low-temperature refrigeration condition can be determined according to the size of the outdoor ambient temperature.

[0075] S103, when the low-temperature refrigeration condition is met, obtaining the discharge pressure P of the compressor. d For example, when the low-temperature refrigeration condition is met, the discharge pressure of the compressor can be obtained through a pressure sensor arranged at the discharge port of the compressor. Of course, the discharge pressure of the compressor can also be indirectly obtained by arranging a temperature sensor or other detection element at the discharge port of the compressor.

[0076] S104, comparing the size of the discharge pressure P and the preset pressure P. d For example, after obtaining the discharge pressure, the size of the discharge pressure and the preset pressure can be compared by comparing whether the difference between the two is greater than 0 or whether the ratio between the two is greater than 1.

[0077] S105, based on the comparison result, respectively adjusting the opening degree of the first air deflector 22 and the second air deflector. For example, after determining the size of the discharge pressure and the preset pressure, the air circulation speed can be changed by respectively controlling the opening degree of the first air deflector 22 and the second air deflector, and then the heat exchanger efficiency of the outdoor heat exchanger can be adjusted to ensure that the air conditioner operates normally under low-temperature refrigeration conditions and to avoid frosting of the indoor heat exchanger.

[0078] The present application can 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 of the indoor heat exchanger, ensuring normal operation of the air conditioner under low-temperature refrigeration conditions, meeting the low-temperature refrigeration needs of users, and improving the operation reliability and refrigeration operating range of the air conditioner. In addition, the present application effectively solves the problem of frosting of the indoor heat exchanger of the air conditioner under low-temperature refrigeration conditions by adjusting the opening degree of the first air deflector and the second air deflector, without relying on additional heating devices and with low energy consumption.

[0079] The preferred embodiments of the control method of the air conditioner of the present application will be described below. Among them, the first preset temperature is T1, the second preset temperature is T2, and the third preset temperature is T3.

[0080] In one embodiment, the control method according to claim 1, further comprising, before the step of "obtaining the outdoor ambient temperature Tao when the air conditioner operates in the refrigeration mode":

[0081] In response to the start instruction of the cooling mode, all the first air deflectors 22 and all the second air deflectors are controlled to keep in the closed state.

[0082] It should be noted that, in order to avoid the problem of frost formation on the indoor heat exchanger due to low outdoor ambient temperature when the air conditioner operates in the cooling mode, all the first air deflectors 22 and all the second air deflectors are controlled to keep in the closed state in response to the start instruction of the cooling mode, so that the outdoor unit of the air conditioner is in the air internal circulation state. The specific opening degree of the first air deflector 22 and the second air deflector is adjusted according to the subsequent outdoor ambient temperature and the discharge pressure of the compressor, so as to ensure the cooling efficiency and avoid frost formation on the indoor heat exchanger.

[0083] For example, the number of the first air deflectors 22 is 1 and the number of the second air deflectors is 4. When the air conditioner receives the start instruction of the cooling mode, one first air deflector 22 and four second air deflectors on the outdoor unit can be controlled to keep in the closed state.

[0084] In an embodiment, the control method comprises:

[0085] When Tao > T1, the opening degree of all the first air deflectors is adjusted to the first maximum opening degree K max1 and the opening degree of all the second air deflectors is adjusted to the second maximum opening degree K max2 .

[0086] 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, there is no frost formation on the indoor heat exchanger, and therefore, by controlling all the first air deflectors 22 and all the second air deflectors to open at their maximum opening degrees, the air flow efficiency can be enhanced, the cooling efficiency can be improved, and a more comfortable environment can be provided for the user. 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, the air conditioner meets the condition of low-temperature cooling, and there is a risk of frost formation on the indoor heat exchanger. The first maximum opening degree K max1 and the second maximum opening degree K max2 of the second air deflector can be the same or different, and the specific size relationship can be adjusted according to the actual situation.

[0087] For example, the first preset temperature T1 is -5℃, the first maximum opening degree K max1 is 90°, and the second maximum opening degree K max2The top of the unit 1 is provided with an air outlet covering the first snow cover 2, and the front, rear, left, and right sides are respectively provided with air inlets covering the second snow cover. When Tao > -5℃, it indicates that the outdoor ambient temperature is relatively high, the air conditioner does not meet the low-temperature cooling conditions, and there is no frosting problem on the indoor heat exchanger. Therefore, in order to improve the cooling efficiency of the air conditioner, the first air guide plate 22 on the first snow cover 2 can be controlled to open at 90°, and the second air guide plates on the front, rear, left, and right snow covers can all be opened at 90°.

[0088] For example, with the first preset temperature T1 being -5℃, the first maximum opening K... max1 The second maximum opening is 90°, K. max2 The top of the unit 1 is provided with an air outlet covered by a first snow cover 2, and the front and rear sides are respectively provided with air inlets covered by second snow covers. Air inlets without second snow covers are provided on the left and right sides. When Tao > -5℃, it indicates that the outdoor ambient temperature is relatively high, the air conditioner does not meet the low-temperature cooling conditions, and there is no frosting problem on the indoor heat exchanger. Therefore, to improve the cooling efficiency of the air conditioner, the first air guide plate 22 on the first snow cover 2 can be controlled to open at 90°, the second air guide plates on the front and rear snow covers can both open at 100°, and the second air guide plates at the air inlets on the left and right sides of the unit can both open at 100°.

[0089] Next, the control method of the air conditioner when it meets the low-temperature cooling conditions is described. Because T ao The range ≤T1 is too broad, encompassing a variety of different low-temperature refrigeration conditions. Therefore, the methods required to prevent frosting of indoor heat exchangers under these conditions will also differ. Specifically, different low-temperature environments have varying degrees of impact on frosting of indoor heat exchangers, requiring that different strategies be adopted while fully considering the different low-temperature refrigeration conditions. These low-temperature refrigeration conditions include T2. <T ao ≤T1、T3 <T ao ≤T2 and T ao ≤T3.

[0090] The following uses low-temperature refrigeration conditions as T2. <T ao ≤T1 describes the control method of the air conditioner.

[0091] In one implementation, the cryogenic refrigeration condition is T2. <T ao When the pressure is ≤T1 and the preset pressure P includes the first preset pressure P1, the step of "adjusting the opening of the first air guide plate 22 and the second air guide plate respectively based on the comparison result" further includes:

[0092] When P dIf P1, the opening degree of the at least one first deflector 22 is adjusted to the first opening degree K1 and the opening degree of the at least one second deflector is adjusted to the second opening degree K2.

[0093] 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 deflector, K max2 is the second maximum opening degree of the second deflector.

[0094] It should be noted that when the air conditioner is in a low-temperature refrigeration working condition, the discharge 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 working condition and avoid the problem of frosting of the indoor heat exchanger, the air circulation efficiency of the outdoor unit can be changed by adjusting the opening degrees of the first deflector 22 and the second deflector to reduce the heat exchange efficiency of the outdoor heat exchanger. During the adjustment of the opening degrees of the first deflector 22 and the second deflector, the first opening degree can be greater than the second opening degree, can be less than the second opening degree, or can be equal to the first opening degree, as long as the frosting of the indoor heat exchanger can be avoided.

[0095] For example, the first preset temperature T1 is -5℃, the second preset temperature T2 is -15℃, the first preset pressure P1 is 0.8MPa, the first opening degree K1 is 45°, and the second opening degree K2 is the second maximum opening degree K max2 , K max2 is 90°. The top of the machine body 1 is provided with an air outlet through hole covered by the first snow cover 2, and the front, rear, left and right sides are respectively provided with air inlet through holes covered by the second snow cover. It is described. When -15℃<T ao ≤-5℃, it indicates that the air conditioner meets the low-temperature refrigeration condition. At this time, if P d <0.8MPa, it can be considered that the indoor heat exchanger is prone to frosting when the heat exchange capacity of the outdoor heat exchanger is relatively strong, thereby 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, to control the first deflector 22 on the first snow cover 2 to open at 45°, and the second deflector on the front, rear, left and right snow covers to open at 90°. After the first deflector 22 and the second deflector are opened according to 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 working condition can be ensured.

[0096] For example, let the first preset temperature T1 be -5℃, the second preset temperature T2 be -15℃, the first preset pressure P1 be 0.8MPa, and the first opening K1 be the first maximum opening K. max1 K max1 The first opening is 90°, the second opening K2 is 45°, and the top of the body 1 has an air outlet covering the first snow cover 2, and the left side has an air inlet covering the second snow cover. (When -15℃) <T ao ≤-5℃ and P d When the pressure is less than 0.8 MPa, the first air guide plate 22 on the first snow cover 2 can be opened at 90° and the second air guide plate on the left snow cover 3 can be opened at 45°, which can prevent the indoor heat exchanger from frosting and ensure that the air conditioner operates normally under low temperature cooling conditions.

[0097] For example, let's assume a first preset temperature T1 of -5°C, a second preset temperature T2 of -15°C, a first preset pressure P1 of 0.8MPa, a first opening K1 and a second opening K2 both of 45°. The machine body 1 has an air outlet covered by a first snow cover 2 on its top, an air inlet covered by a second snow cover on its front side, and an air inlet without a second snow cover on its rear side. When P... d <0.8MPa and -15℃ <T ao At ≤-5℃, the first air guide plate 22 on the first snow cover 2 can be opened at 45°, the second air guide plate on the front snow cover 6 can be opened at 45°, and the second air guide plate on the air inlet on the rear side of the unit 1 can be opened at 45°. This can reduce the air circulation efficiency of the outdoor unit, thereby ensuring that the air conditioner operates normally under low temperature cooling conditions while preventing the indoor heat exchanger from frosting.

[0098] For example, with a first preset pressure P1 of 0.8 MPa, a first opening K1 of 45°, and a second opening K2 equal to the second maximum opening K... max2 K max2 The angle is 90°. The top of the body 1 has an air outlet covered by the first snow cover 2, the left side has an air outlet without the first snow cover 2, and the front and rear sides have air inlets covered by the second snow cover. When P... d <0.8MPa and -15℃ <T ao At ≤-5℃, the first air guide plate 22 on the first snow cover 2 on the top of the unit 1 can be opened at 45°, the second air guide plate on the front snow cover 6 can be opened at 90°, and the first air guide plate 22 at the air outlet on the left side of the unit 1 and the second air guide plate at the air inlet on the rear side can be kept closed. This can improve the cooling efficiency of the air conditioner while preventing the indoor heat exchanger from frosting.

[0099] Further, when the preset pressure P further comprises the second preset pressure P2, the step of "adjusting the opening degree of the first and second guide vanes based on the comparison result" further comprises:

[0100] When P1≤P d <P2, the opening degree of the at least one first guide vane 22 is adjusted to the third opening degree K3 and the opening degree of the at least one second guide vane is adjusted to the fourth opening degree K4;

[0101] Wherein, min(K max1 , K max2 )>min(K3, K4)≥min(K1, K2), and max(K max1 , K max2 )≥max(K3, K4)≥max(K1, K2).

[0102] It should be noted that when the air conditioner is in a low-temperature refrigeration working condition and the discharge pressure of the compressor is relatively high, the heat exchange efficiency of the outdoor heat exchanger is appropriately increased, and the indoor heat exchanger will not frost. Therefore, the opening degree of the first and second guide vanes can be adjusted respectively to increase the air circulation efficiency of the outdoor unit and ensure the normal operation of the air conditioner in the low-temperature refrigeration working condition while avoiding frosting of the indoor heat exchanger. The adjustment mode of the opening degree of the first and second guide vanes can be that the fourth opening degree is greater than the second opening degree while keeping the third opening degree the same as the first opening degree; or the third opening degree is greater than the first opening degree while keeping the fourth opening degree the same as the second opening degree; or the fourth opening degree is greater than the second opening degree while the third opening degree is greater than the first opening degree.

[0103] For example, the first preset temperature T1 is -5℃, the second preset temperature T2 is -15℃, the first preset pressure P1 is 0.8MPa, the second preset pressure P2 is 1.2MPa, the first opening degree K1 is 45°, the second opening degree K2 of the four second guide vanes is the second maximum opening degree K max2 , the third opening degree K3 is 60°, the fourth opening degree K4 is the second maximum opening degree K max2 , and K max2 is 90°. The top of the body 1 is provided with an air outlet through hole covered by the first snow cover 2, and the front, rear, left and right sides are respectively provided with air inlet through holes covered by the second snow cover. ao When -15℃ dA pressure <1.2 MPa indicates a relatively high compressor discharge pressure. In this case, appropriately increasing the air circulation efficiency of the outdoor unit can enhance the air conditioner's cooling performance and prevent frost buildup on the indoor heat exchanger. Specifically, the first air guide vane 22 on the first snow cover 2 can be controlled to open at 60°, and the second air guide vanes on the front, rear, left, and right snow covers can all be opened at 90°. This aims to increase the air conditioner's cooling efficiency while preventing frost buildup on the indoor heat exchanger, ensuring its normal operation under low-temperature cooling conditions.

[0104] For example, let the first preset temperature T1 be -5℃, the second preset temperature T2 be -15℃, the first preset pressure P1 be 0.8MPa, the second preset pressure P2 be 1.2MPa, and the first opening K1 and the third opening K3 both be the first maximum opening K. max1 K max1 The first opening is 90°, the second opening K2 is 45°, the fourth opening K4 is 60°, and the top of the body 1 has an air outlet covering the first snow cover 2, and the left side has an air inlet covering the second snow cover. (When -15℃) <T ao ≤-5℃ and 0.8MPa≤P d <1.2MPa, by controlling the first air guide plate 22 on the first snow cover 2 to open at 90° and the second air guide plate on the left snow cover 3 to open at 60°, the cooling efficiency of the air conditioner can be increased, while avoiding frost on the indoor heat exchanger and ensuring its normal operation under low temperature cooling conditions.

[0105] For example, let's assume a first preset temperature T1 of -5℃, a second preset temperature T2 of -15℃, a first preset pressure P1 of 0.8MPa, a second preset pressure P2 of 1.2MPa, a first opening K1 of 45°, second opening K2 of the second air guide plates on both the front and rear snow covers of 45°, and third and fourth openings K3 and K4 of 60°. The machine body 1 has an air outlet covering the first snow cover 2 on its top, an air inlet covering the second snow cover on its front side, and an air inlet without the second snow cover on its rear side. When -15℃... <T ao ≤-5℃ and 0.8MPa≤P d When the pressure is less than 1.2 MPa, by controlling the first air guide plate 22 on the first snow cover 2 to open at 60°, the second air guide plate on the front snow cover 6 to open at 60°, and the second air guide plate at the air inlet at the rear of the unit 1 to open at 60°, the cooling efficiency of the air conditioner can be increased, while avoiding frost formation on the indoor heat exchanger and ensuring its normal operation under low temperature cooling conditions.

[0106] For example, the first preset temperature T1 is -5℃, the second preset temperature T2 is -15℃, the first preset pressure P1 is 0.8 MPa, the second preset pressure P2 is 1.2 MPa, the first opening degree K1 of the first air deflector 22 at the top of the machine body 1 is 45°, the second opening degree K2 of the second air deflector on the front snow cover 6 is 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°, and the top of the machine body 1 is provided with the air outlet through hole of the first snow cover 2, the left side is provided with the air outlet through hole without the first snow cover 2, the front side is provided with the air inlet through hole of the second snow cover, and the rear side is provided with the air inlet through hole without the second snow cover. When -15℃ < T ao ≤ -5℃ and 0.8 MPa ≤ P d < 1.2 MPa, the first air deflector 22 on the first snow cover 2 at the top of the machine body 1 can be controlled to open at 60°, the second air deflector on the front snow cover 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 machine body 1 and the second air deflector at the air inlet through hole on the rear side are kept closed. This can improve the cooling efficiency of the air conditioner while avoiding frosting of the indoor heat exchanger.

[0107] Further, the control method further comprises:

[0108] 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 .

[0109] It should be noted that when the discharge pressure of the compressor is high enough, the indoor heat exchanger is not easy to frost when the air conditioner is cooling in the environment of T2 < T ao ≤ T1. Therefore, the opening degree of at least one first air deflector 22 and at least one second air deflector can be adjusted to the respective maximum opening degree, so as to fully exert the cooling efficiency of the air conditioner and ensure that the indoor temperature can be rapidly reduced to provide a comfortable indoor environment for the user.

[0110] For example, the first preset temperature T1 is -5℃, the second preset temperature T2 is -15℃, the second preset pressure P2 is 1.2 MPa, the third opening degree K3 is 60°, and the fourth opening degree K4 of the four second air deflectors is the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 90°, and the top of the machine body 1 is provided with the air outlet through hole of the first snow cover 2, and the front, rear, left and right sides are respectively provided with the air inlet through hole of the second snow cover. When -15℃ < Tao ≤-5℃, it indicates that the air conditioner meets the low-temperature refrigeration condition. If P d ≥1.2MPa, it indicates that the discharge pressure of the compressor is high, at this time, the indoor heat exchanger is not easy to frost phenomenon. At this time, in order to improve the refrigeration efficiency and ensure the stable operation of the air conditioner under the low-temperature refrigeration condition, the first air deflector 22 on the first snow cover 2 can be controlled to be opened at 90°, and the second air deflectors on the front snow cover 6, the rear snow cover 5, the left snow cover 3 and the right snow cover 4 are all opened at 90°.

[0111] For example, the first preset temperature T1 is-5℃, the second preset temperature T2 is-15℃, the second preset pressure P2 is 1.2MPa, the third opening degree K3 of the first air deflector 22 is 60°, and the fourth opening degree K4 of the second air deflector on the front snow cover 6 is the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 100°, and the top of the machine body 1 is provided with the air outlet through hole of the first snow cover 2, and the front, rear, left and right sides are respectively provided with the air inlet through hole of the second snow cover. When-15℃ ao ≤-5℃, and P d ≥1.2MPa, the first air deflector 22 on the first snow cover 2 can be controlled to be opened at 100°, the second air deflectors on the front snow cover 6 and the rear snow cover 5 are opened at 90°, and the second air deflectors on the left snow cover 3 and the right snow cover 4 remain closed, which can improve the refrigeration efficiency of the air conditioner while avoiding the frost of the indoor heat exchanger.

[0112] For example, the first preset temperature T1 is-5℃, the second preset temperature T2 is-15℃, the second preset pressure P2 is 1.2MPa, the third opening degree K1 of the first air deflector 22 on the top of the machine body 1 is 60°, and the fourth opening degree K4 of the second air deflector on the front snow cover 6 is the second maximum opening degree K max2 , K max2 is 90°, the first maximum opening degree K max2 is 100°, and the top of the machine body 1 is provided with the air outlet through hole of the first snow cover 2, and the left side is provided with the air outlet through hole of the first snow cover 2, and the front and rear sides are respectively provided with the air inlet through hole of the second snow cover. When-15℃ ao ≤-5℃, and P d ≥1.2MPa, the first air deflector 22 on the first snow cover 2 on the top of the machine body 1 can be controlled to be opened at 90°, the second air deflector on the front snow cover 6 is opened at 90°, and the first air deflector 22 on the first snow cover 2 and the second air deflector on the rear snow cover 5 remain closed, which can improve the refrigeration efficiency of the air conditioner while avoiding the frost of the indoor heat exchanger.

[0113] The low-temperature refrigeration condition is T3<T ao The control method of the air conditioner is described.

[0114] In an embodiment, 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 "adjusting the opening degrees of the first guide vanes 22 and the second guide vanes based on the comparison result" further includes:

[0115] When P d <P3, the opening degree of the at least one first guide vane 22 is adjusted to a fifth opening degree K5, and the opening degree of the at least one second guide vane is adjusted to a sixth opening degree K6.

[0116] Wherein, T3 is a third preset temperature, 0

[0117] It should be noted that when the air conditioner is refrigerating under the condition that the outdoor environment temperature is T3<T ao ≤T2, since the above outdoor environment temperature is lower than T2<T ao ≤T1, the indoor heat exchanger is more prone to frosting. Therefore, the opening degrees of the first guide vanes 22 and the second guide vanes need to be adjusted to further reduce the air circulation efficiency of the outdoor unit and the heat exchanger capacity of the outdoor heat exchanger. 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 size relationship can be set by oneself.

[0118] For example, the first preset temperature T1 is -5℃, the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8MPa, the first opening degree K1 is 45°, the second opening degrees K2 of the four second guide vanes are all the second maximum opening degree K max2 , the fifth opening degree K5 is 30°, the sixth opening degree K6 is 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 by the first snow cover 2, and the front, rear, left and right sides are respectively provided with air inlet through holes covered by the second snow cover. d <0.8MPa, it can be considered that the indoor heat exchanger is under the condition that the outdoor environment temperature is -25℃<T ao ≤-15℃, compared to the condition that the outdoor environment temperature is -15℃<T aoFrosting is more likely to occur at temperatures ≤-5℃, thus affecting the cooling performance of the air conditioner. Therefore, it is necessary to further reduce the air circulation efficiency of the outdoor unit to improve the heat exchange efficiency of the outdoor heat exchanger. This can be achieved by controlling the first air guide vane 22 on the first snow cover 2 to open at 30°, the second air guide vanes on both the left and right snow covers to open at 90°, and the second air guide vanes on the front and rear snow covers to remain closed. This reduces the heat exchange capacity of the outdoor heat exchanger, thereby preventing frost formation on the indoor heat exchanger and ensuring the air conditioner operates normally under low-temperature cooling conditions.

[0119] For example, with the second preset temperature T2 being -15℃, the third preset temperature T3 being -25℃, and the third preset pressure P3 being 0.8MPa, the first opening K1 and the fifth opening K5 are both the first maximum opening K. max1 K max1 The first opening is 90°, the second opening K2 is 45°, the sixth opening K6 is 30°, and the top of the body 1 has an air outlet covering the first snow cover 2, and the left side has an air inlet covering the second snow cover. When P d <0.8MPa and -25℃ <T ao When the temperature is ≤-15℃, the first air guide plate 22 on the first snow cover 2 can be opened at 90° and the second air guide plate on the left snow cover 3 can be opened at 30°, thereby reducing the heat exchange capacity of the outdoor heat exchanger and preventing the indoor heat exchanger from frosting.

[0120] For example, let's assume a second preset temperature T2 of -15°C, a third preset temperature T3 of -25°C, a third preset pressure P3 of 0.8MPa, a first opening K1 of 45°, a second opening K2 of 45° for both snow shields, a fifth opening K5 of 30°, a sixth opening K6 of 30°, and an air outlet covering the first snow shield 2 on the top of the body 1, an air inlet covering the second snow shield on the front, and an air inlet not covered by the second snow shield on the rear. When P... d <0.8MPa and -25℃ <T ao When the temperature is ≤-15℃, the first air guide plate 22 on the first snow cover 2, the second air guide plate on the front snow cover 6, and the second air guide plate at the rear air inlet can be opened at 30°, thereby reducing the heat exchange capacity of the outdoor heat exchanger and preventing the indoor heat exchanger from frosting.

[0121] For example, with the second preset temperature T2 being -15℃, the third preset temperature T3 being -25℃, and the third preset pressure P3 being 0.8MPa, the first opening K1 of the first air guide plate 22 located on the top of the body 1 is 45°, and the second opening K2 of the second air guide plate on the front snow cover 6 is the second maximum opening K. max The fifth opening K5 is 30°, and the sixth opening K6 is the second maximum opening K.max , K max = 90°, the top of the machine body 1 is provided with the air outlet through hole covered by the first snow cover 2, the left side is provided with the air outlet through hole not covered by the first snow cover 2, the front side is provided with the air inlet through hole covered by the second snow cover, and the rear side is provided with the air inlet through hole not covered by the second snow cover. When P d <0.8MPa and -25℃ < T ao ≤ -15℃, the first deflector 22 on the first snow cover 2 at the top of the machine body 1 can be opened at 30°, the second deflector on the front snow cover 6 can be opened at 90°, and the first deflector 22 at the air outlet through hole on the left side of the machine body 1 and the second deflector at the air inlet through hole on the rear side of the machine body 1 are kept in the closed state, so that the heat exchange capacity of the outdoor heat exchanger can be reduced, and frosting of the indoor heat exchanger can be avoided.

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

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

[0124] Wherein, 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 the second preset pressure, or can be different, and the specific size relationship can be set by oneself.

[0126] For example, when the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8MPa, the fourth preset pressure P4 is 1.2MPa, the fifth opening degree K5 is 30°, the sixth opening degree K6 of the second deflector on the left and right snow covers is the second maximum opening degree K max2 , the seventh opening degree K7 is 45°, the eighth opening degree K8 is the second maximum opening degree K max2 , K max2 = 90°, the top of the machine body 1 is provided with the air outlet through hole covered by the first snow cover 2, the front, rear, left and right sides are respectively provided with the air inlet through hole covered by the second snow cover. When the air conditioner is cooling under the condition that the outdoor environment temperature is -25℃ ≤ P d <-15℃, if the discharge pressure of the compressor is 0.8MPa ≤ Pd A pressure <1.2 MPa indicates a relatively high compressor discharge pressure. In this case, appropriately increasing the air circulation efficiency of the outdoor unit can enhance the air conditioner's cooling performance and prevent frost buildup on the indoor heat exchanger. Specifically, the first air guide vane 22 on the first snow cover 2 can be controlled to open at 45°, the second air guide vanes on both the left and right snow covers can be opened at 90°, and the second air guide vanes on the front and rear snow covers can be kept closed at their respective air inlets 71. This aims to increase the air conditioner's cooling efficiency while preventing frost buildup on the indoor heat exchanger, ensuring its normal operation under low-temperature cooling conditions.

[0127] For example, let the second preset temperature T2 be -15℃, the third preset temperature T3 be -25℃, the third preset pressure P3 be 0.8MPa, the fourth preset pressure P4 be 1.2MPa, and the fifth opening K5 be the first maximum opening K. max1 The sixth opening K6 of the second air deflector on the left snow cover 3 is 30°, and the seventh opening K7 is the first maximum opening K. max1 The eighth opening, K8, is 45°. max1 The air vent for the first snow cover 2 is located on the top of the body 1 at a 90° angle, and the air inlet for the second snow cover is located on the left side. When -25℃≤P d <-15℃ and 0.8MPa≤P d When the pressure is less than 1.2 MPa, the first air guide plate 22 on the first snow cover 2 is opened at 90° and the second air guide plate on the left snow cover 3 is opened at 45°, which can prevent the indoor heat exchanger from frosting and ensure that the air conditioner operates normally under low temperature cooling conditions.

[0128] For example, let's consider a second preset temperature T2 of -15℃, a third preset temperature T3 of -25℃, a third preset pressure P3 of 0.8MPa, a fourth preset pressure P4 of 1.2MPa, a fifth opening K5 of 30°, a sixth opening K6 of 30° for the second air guide plates on the front and rear snow covers, and seventh and eighth openings K7 and K8 of 45°. The machine body 1 has an air outlet on top covering the first snow cover 2 and air inlets on the front and rear sides covering the second snow cover. When -25℃ ≤ P... d <-15℃ and 0.8MPa≤P d When the pressure is less than 1.2 MPa, the first air guide plate 22 on the first snow cover 2 can be controlled to open at 45°, and the second air guide plates on the front and rear snow covers can also be opened at 45°, which can prevent the indoor heat exchanger from frosting and ensure that the air conditioner operates normally under low temperature cooling conditions.

[0129] For example, when the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8 MPa, the fourth preset pressure P4 is 1.2 MPa, the fifth opening degree K1 of the first air deflector 22 at the top of the machine body 1 is 30°, the sixth opening degree K6 of the second air deflector on the front snow cover 6 is the maximum opening degree K max , the seventh opening degree K7 is 45°, and the eighth opening degree K8 is the maximum opening degree K max2 , K max2 is 90°, the top of the machine body 1 is provided with the air outlet through hole of the first snow cover 2, the left side is provided with the air outlet through hole of the first snow cover 2 without cover, the front side is provided with the air inlet through hole of the second snow cover with cover, and the rear side is provided with the air inlet through hole of the second snow cover without cover. When -25℃≤P d <-15℃ and 0.8 MPa≤P d <1.2 MPa, the first air deflector 22 on the first snow cover 2 at the top of the machine body 1 can be controlled to open at 45°, the second air deflector on the front snow cover 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 machine body 1 and the second air deflector at the air inlet through hole on the rear side are kept closed.

[0130] Further, the control method further comprises:

[0131] When P d ≥P4, the opening degree of at least one first air deflector 22 is adjusted to a ninth opening degree K9, and the opening degree of at least one second air deflector is adjusted to a 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, when the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8 MPa, the fourth preset pressure P4 is 1.2 MPa, the seventh opening degree K7 is 45°, the eighth opening degree K8 of the second air deflector on the left and right snow covers is the second maximum opening degree K max2 , the ninth opening degree K9 is 60°, and the tenth opening degree K 10 is the second maximum opening degree K max2 , K max290°, the top of the machine body 1 is provided with an air outlet hole covered by the first snow cover 2, and the front, rear, left and right sides are provided with air inlet holes covered by the second snow cover. When the air conditioner is used for refrigeration under the condition that the outdoor ambient temperature is -25℃≤P d <-15℃, if the discharge pressure of the compressor is under the condition that P d ≥1.2MPa, compared with 0.8MPa≤P d <1.2MPa, the indoor heat exchanger is not easy to frost. Specifically, the first deflector 22 on the first snow cover 2 is controlled to be opened at 60°, the second deflectors on the left and right snow covers are opened at 90°, and the second deflectors on the front and rear snow covers are kept closed, so as to keep the corresponding air inlets 71 in the state, which can improve the refrigeration capacity of the air conditioner, avoid the indoor heat exchanger from frosting, and ensure the normal operation of the air conditioner under the low-temperature refrigeration condition.

[0134] For example, the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8MPa, the fourth preset pressure P4 is 1.2MPa, the seventh opening degree K7 is the maximum opening degree K max1 , the eighth opening degree K8 is 45°, the ninth opening degree K9 is the maximum opening degree K max1 , the tenth opening degree K 10 is 60°, and K max1 is 90°. The top of the machine body 1 is provided with an air outlet hole covered by the first snow cover 2, and the left side is provided with an air inlet hole covered by the second snow cover. When -25℃≤P d <-15℃ and P d ≥1MP, the first deflector 22 on the first snow cover 2 is controlled to be opened at 90°, and the second deflector on the left snow cover 3 is controlled to be opened at 60°, so as to avoid the indoor heat exchanger from frosting and ensure the normal operation of the air conditioner under the low-temperature refrigeration condition.

[0135] For example, the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8MPa, the fourth preset pressure P4 is 1.2MPa, the seventh opening degree K7 is 45°, the eighth opening degree K8 of the two second deflectors is 45°, the ninth opening degree K9 is 60°, and the tenth opening degree K 10 is 60°. The top of the machine body 1 is provided with an air outlet hole covered by the first snow cover 2, an air inlet hole covered by the second snow cover in front, and an air inlet hole covered by the second snow cover at the rear. When -25℃≤P d <-15℃ and P dWhen P ≥ 1MP, the first deflector 22 on the first snow cover 2, the second deflector on the front snow cover 6, and the second deflector at the rear side air inlet hole are opened at 60°, which can avoid frosting of the indoor heat exchanger and ensure normal operation of the air conditioner under low-temperature refrigeration conditions.

[0136] For example, when the second preset temperature T2 is -15℃, the third preset temperature T3 is -25℃, the third preset pressure P3 is 0.8MPa, the fourth preset pressure P4 is 1.2MPa, the seventh opening degree K7 of the first deflector 22 at the top of the machine body 1 is 45°, the eighth opening degree K8 of the second deflector on the front snow cover 6 is the maximum opening degree K max2 , the ninth opening degree K9 is 60°, the tenth opening degree K 10 is the maximum opening degree K max2 , K max2 is 90°, and the top of the machine body 1 is provided with the air outlet hole of the first snow cover 2, the left side is provided with the air outlet hole without the first snow cover 2, the front side is provided with the air inlet hole of the second snow cover, and the rear side is provided with the air inlet hole without the second snow cover. When -25℃ ≤ P d <-15℃ and P d ≥ 1MP, the first deflector 22 on the first snow cover 2 at the top of the machine body 1 is opened at 60°, the second deflector on the front snow cover 6 is opened at 90°, and the first deflector 22 at the left side air outlet hole and the second deflector at the rear side air inlet hole are kept closed.

[0137] The control method of the air conditioner under low-temperature refrigeration conditions is described below. ao ≤ T3.

[0138] In one embodiment, the low-temperature refrigeration condition is T ao ≤ T3, and the preset pressure includes a fifth preset pressure P5. The step of "adjusting the opening degrees of the first deflector 22 and the second deflector based on the comparison result" further includes:

[0139] When P d < P5, all the first deflectors 22 are controlled to be closed to the corresponding air outlets 23, and all the second deflectors are controlled to be closed to the corresponding air inlets 71.

[0140] Wherein, P3 ≤ P5.

[0141] It should be noted that when the air conditioner is refrigerating under the condition of T ao ≤ T3, if the discharge pressure of the compressor does not reach a certain height, the indoor heat exchanger will frost regardless of how to reduce the air circulation efficiency due to the excessively low outdoor ambient temperature.

[0142] For example, taking the third preset temperature T3 as -25℃, the fifth preset pressure P5 as 1.2MPa, and the top of the body 1 being provided with the air outlet through holes of the first snow cover 2 and the front, rear, left and right sides being provided with the air inlet through holes of the second snow cover, the following is described. When P d <1.2MPa, it can be considered that the indoor heat exchanger is in the condition of T ao ≤-25℃, no matter how the opening degrees of the first air deflector 22 and the second air deflectors are adjusted, the indoor heat exchanger will have the problem of frosting. At this time, the first air deflector 22 and the four second air deflectors can be controlled to keep closed to the corresponding air outlets 23, so that the outdoor unit is in air internal circulation, thereby avoiding the indoor heat exchanger from frosting due to the outdoor air entering.

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

[0144] When P d ≥P5, the opening degree of at least one first air deflector 22 is adjusted to the eleventh opening degree K 11 , and the opening degree of at least one second air deflector is adjusted 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 is in cooling at T ao ≤T3, when the discharge pressure of the compressor is large enough, the air circulation efficiency of the outdoor unit can be appropriately increased to avoid the indoor heat exchanger from frosting, and improve the cooling effect of the air conditioner.

[0147] For example, taking the third preset temperature T3 as -25℃, the fifth preset pressure P5 as 1.2MPa, the fifth opening degree K5 as 30°, the sixth opening degree K6 of the second air deflectors on the left and right snow covers as the maximum opening degree K max2 , K max2 as 90°, the eleventh opening degree K 11 as 0°, and the twelfth opening degree K 12 as the minimum opening degree, i.e. 10°, the top of the body 1 being provided with the air outlet through holes of the first snow cover 2 and the front, rear, left and right sides being provided with the air inlet through holes of the second snow cover, the following is described. When P d ≥1.2MPa, it can be considered that the indoor heat exchanger is in the condition of T aoAt temperatures ≤-25℃, the compressor's discharge pressure is sufficiently high. At this temperature, the outdoor unit's air circulation efficiency can be adjusted to improve the air conditioner's cooling efficiency. Therefore, the second air guide vanes on the left and right snow covers can be opened at 10°, while the second air guide vanes on the front and rear snow covers and the first air guide vane 22 on the first snow cover remain closed. This prevents frost buildup on the indoor heat exchanger while improving the air conditioner's cooling effect.

[0148] For example, the third preset temperature T3 is -25℃, the fifth preset pressure P5 is 1.2MPa, and the fifth opening K5 is the maximum opening K. max1 K max1 The sixth opening K6 is 30°, and the eleventh opening K is 90°. 11 The minimum opening is 10°, and the twelfth opening is K. 12 The temperature is 0°. The top of the body 1 has an air outlet for the first snow cover 2, and the left side has an air inlet for the second snow cover. When T... ao ≤-25℃ and P d When the pressure is ≥1.2MPa, the first air guide plate 22 on the first snow cover 2 is opened at 10°, and the second air guide plate on the left snow cover 3 is kept closed at the corresponding air inlet 71. This can increase the heat exchange efficiency of the indoor heat exchanger and thus improve the cooling efficiency of the air conditioner.

[0149] For example, with the third preset temperature T3 being -25℃, the fifth preset pressure P5 being 1.2MPa, the fifth opening K5 being 30°, the sixth opening K6 of the second air guide on the front and rear snow covers being 30°, and the eleventh opening K... 11 It is 10°, the twelfth opening K 12 The angle is 10°. The top of the body 1 has an air outlet covered by the first snow cover 2, the left side has an air outlet without the first snow cover 2, the front side has an air inlet covered by the second snow cover, and the rear side has an air inlet without the second snow cover. When T... ao ≤-25℃ and P d When the pressure is ≥1.2MPa, the first air guide plate 22 on the first snow cover 2 and the second air guide plate on the front snow cover 6 can be controlled to open at 10°, while the first air guide plate 22 at the air outlet on the left side of the body 1 and the second air guide plate at the air inlet on the rear side are kept closed.

[0150] In one implementation, in response to a heating mode activation command, all first air deflectors 22 are controlled to open to a first maximum degree K. max1 All second air deflectors are opened to the second maximum opening degree K. max2 Start.

[0151] It should be noted that when the air conditioner runs in the heating mode, by opening the first air deflector 22 and the second air deflector at the respective maximum opening degree, 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, the first maximum opening degree K max1 and the second maximum opening degree K max1均 are 90°. The front, rear, left, and right sides of the machine body 1 are respectively provided with air inlet through holes. When the air conditioner runs in the heating mode, by controlling the first air deflector 22 and the second air deflectors on the front, rear, left, and right snow guards to be opened at 90°, a rapid heating effect can be achieved.

[0153] Next, in combination with FIG. 6, a possible operation process of the control method of the air conditioner of the present application will be briefly described. FIG. 6 is a logic diagram of a possible implementation of the control method of the air conditioner of the present application.

[0154] S201, when receiving a power-on instruction, obtaining the operation mode of the air conditioner, and then performing S202.

[0155] S202, determining whether the operation mode is the cooling mode? If yes, S203 is performed; if not, S225 is performed.

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

[0157] S204, obtaining the outdoor environment temperature T ao , and then performing S205.

[0158] S205, determining whether T ao >-5℃ is true? If true, S206 is performed; otherwise, S207 is performed.

[0159] S206, controlling the first air deflector 22 and all the second air deflectors to be opened at 90°.

[0160] S207, determining whether -5℃ < T ao ≤-15℃ is true? If true, S208 is performed; otherwise, S214 is performed.

[0161] S208, obtaining the discharge pressure P d of the compressor, and then performing S209.

[0162] S209, determining whether P d <0.8MPa is true? If true, S210 is performed; otherwise, S211 is performed.

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

[0164] S211, judge whether 0.8MPa≤P d <1.2MPa is established? If yes, execute S212; otherwise, execute S213.

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

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

[0167] S214, judge whether -25℃ ao <-15℃ is established? If yes, execute S215; otherwise, execute S221.

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

[0169] S216, judge whether P d <0.8MPa is established? If yes, execute S217; otherwise, execute S218.

[0170] S217, control the first deflector 22 to open at 30°, control the second deflectors on the left and right snow guards to open at 90°, and control the second deflectors on the front and rear snow guards to keep closed.

[0171] S218, judge whether 0.8MPa≤P d <1.2MPa is established? If yes, execute S219; otherwise, execute S220.

[0172] S219, control the first deflector 22 to open at 45°, control the second deflectors on the left and right snow guards to open at 90°, and control the second deflectors on the front and rear snow guards to keep closed.

[0173] S220, control the first deflector 22 to open at 60°, control all the second deflectors on the left and right snow guards to open at 90°, and control the second deflectors on the front and rear snow guards to keep closed.

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

[0175] S222, judge whether P d <1.2MPa is established? If yes, execute S223; otherwise, execute S224.

[0176] S223, control the first deflector 22 and all the second deflectors to remain closed.

[0177] S224, control the second deflectors on the left and right snow guards to open 10°, and the first deflector 22 and the rest of the second deflectors to remain closed.

[0178] S225, control the first deflector 22 and all the second deflectors to open 90°.

[0179] Those skilled in the art will appreciate that the combination of features of different embodiments means that within the scope of the application and form different embodiments, although some embodiments described herein include certain features and not others, other embodiments include certain features and not others. For example, in the claims of the application, any one of the claimed embodiments can be used in any combination.

[0180] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art will readily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the relevant technical features without departing from the principles of the present application, and the technical solutions after such changes or replacements will all fall within the protection scope of the present application.

Claims

A control method of an air conditioner, characterized by, The outdoor unit of the air conditioner comprises a machine body with at least one air outlet hole and at least one air inlet hole, and a group of air deflectors, at least one of the at least one air outlet hole is covered with a first snow prevention cover with an air outlet, at least one of the at least one air inlet hole is covered with a second snow prevention cover with an air inlet, and at least one of the second snow prevention cover is in communication with at least one of the first snow prevention cover; the group of air deflectors comprises a first air deflector pivoted at the air outlet and the air outlet hole not covered with the first snow prevention cover, and a second air deflector pivoted at the air inlet and the air inlet hole not covered with the second snow prevention cover; the control method comprises: When the air conditioner operates in the cooling mode, an outdoor environment temperature T ao is acquired. based on the outdoor ambient temperature T ao , determining whether the air conditioner satisfies low-temperature refrigeration conditions; When the low-temperature refrigeration condition is satisfied, then the discharge pressure P of the compressor is acquired d ; comparing the exhaust pressure P d with a magnitude of a preset pressure P; adjusting the opening degree of the first air deflector and the second air deflector respectively based on the comparison result. The control method according to claim 1, characterized in that The low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature refrigeration condition is T2 ao When the low-temperature When P d When P1, the opening of the at least one first deflector is adjusted to a first opening K1 and the opening of the at least one second deflector is adjusted to a second opening K2. 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 a first maximum opening degree of the first deflector, and K max2 is a second maximum opening degree of the second deflector. The control method according to claim 2, characterized in that When the preset pressure P further comprises a second preset pressure P2, the step of "adjusting the opening degree of the first air deflector and the second air deflector respectively based on the comparison result" further comprises: when P1≤P d <P2, the opening degree of at least one of the first deflector is adjusted to a third opening degree K3 and the opening degree of at least one of the second deflector 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). The control method according to claim 3, characterized in that The control method further comprises: When P d ≥ P2, then the opening of at least one of the first louvers is adjusted to a first maximum opening K max1 and the opening of at least one of the second louvers is adjusted to a second maximum opening K max2 . The control method according to claim 2, characterized in that The low-temperature refrigeration condition is T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When T3 ao When P d If P3, then the opening of at least one of the first guide vanes is adjusted to a fifth opening K5 and the opening of at least one of the second guide vanes is adjusted to a sixth opening K6. wherein T3 is a third preset temperature, 0 The control method according to claim 5, characterized in that When the preset pressure P further comprises a fourth preset pressure P4, the step of "adjusting the opening degree of the first air deflector and the second air deflector respectively based on the comparison result" further comprises: When P3≤P d <P4, the opening degree of at least one of the first deflector is adjusted to a seventh opening degree K7 and the opening degree of at least one of the second deflector 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). The control method according to claim 6, characterized in that The control method further comprises: When P d ≥ P4, then the opening degree of at least one of the first deflector is adjusted to a ninth opening degree K9 and the opening degree of at least one of the second deflector is adjusted to a tenth opening degree K 10 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). The control method according to claim 5, characterized in that The low-temperature refrigeration condition is T ao When the low-temperature refrigeration condition is T ao When the low-temperature refrigeration condition is T When P d When P5, control all the first air deflector to close the corresponding air outlet and all the second air deflector to close the corresponding air inlet; wherein P3≤P5; and / or When P d ≥ P5, the opening degree of at least one of the first guide vanes is adjusted to the eleventh opening degree K 11 , and the opening degree of at least the second guide vane is adjusted to the twelfth opening degree K 12 ; wherein 0≤min(K 11 , K 12 )<min(K5, K6), and 0≤max(K 11 , K 12 )<max(K5, K6). The control method according to claim 2, characterized in that The control method further comprises: When T ao > T1, then the opening of all the first louvers is adjusted to the first maximum opening K max1 and the opening of all the second louvers is adjusted to the second maximum opening K max2 . The control method according to claim 1, characterized in that "acquiring an outdoor environment temperature T ao before the step of "acquiring an outdoor environment temperature T ao " further comprises: in response to the starting instruction of the refrigeration mode, controlling all the first air deflectors and all the second air deflectors to keep closed state; and / or The control method further comprises: In response to a start instruction of the heating mode, all the first air deflector plates are controlled to open at a first maximum opening degree K max1 In response to a start instruction of the heating mode, all the first air deflector plates are controlled to open at a first maximum opening degree K max2 In response to a start instruction of the heating mode, all the first air deflector plates are controlled to open at a first maximum opening degree K

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