A control method for an outdoor unit of an air conditioner and the outdoor unit of the air conditioner

Abstract

The present invention provides a control method for an outdoor unit of an air conditioner and the outdoor unit of the air conditioner. The outdoor unit of the air conditioner includes: an outdoor unit housing, and an air outlet is provided on the outdoor unit housing; a wind blocking device, which is arranged at the air outlet and is used to adjust the air outlet area of the air outlet; an outdoor heat exchanger, which is arranged in the outdoor unit housing and includes a heat exchange coil; and the control method includes: obtaining the working mode of the air conditioner; judging whether the working mode is a refrigeration mode; if so, obtaining the detected value of the outdoor ambient temperature; judging whether the detected value of the outdoor ambient temperature is less than a first preset temperature; if so, obtaining the detected value of the heat exchange temperature of the heat exchange coil; adjusting the opening degree of the wind blocking device according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, thereby being able to ensure the condensation temperature and condensation pressure of the air conditioner, and at the same time avoiding the situation of the air conditioner shutting down due to freeze protection, ensuring the normal operation of the air conditioner, and ensuring the refrigeration capacity of the air conditioner in a low-temperature refrigeration environment.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a control method for an outdoor unit of an air conditioner and an outdoor unit of an air conditioner. Background Art

[0002] As a tool for heating in winter and cooling in summer, the air conditioner plays an indispensable role in human work and life.

[0003] However, in some special places, such as bars, base stations, etc., due to factors such as personnel activities or equipment heat generation, the indoor temperature is relatively high all year round, and refrigeration and cooling are required even in winter. Therefore, the air conditioner needs to operate in the cooling mode in a low-temperature environment, which may cause the condensation temperature and condensation pressure of the outdoor unit of the air conditioner to be relatively low. Correspondingly, the evaporation temperature and evaporation pressure of the indoor unit of the air conditioner also decrease, resulting in icing of the indoor unit of the air conditioner. The air conditioner has to perform freeze protection shutdown, thereby reducing the cooling capacity. Summary of the Invention

[0004] An object of the present invention is to solve the problem that the cooling capacity of the air conditioner decreases due to low condensation temperature and low condensation pressure in the low-temperature cooling mode.

[0005] A further object of the present invention is to improve the control method for elevating the condensation temperature and condensation pressure, and timely and accurately control the opening degree of the wind blocking device.

[0006] Specifically, the present invention provides a control method for an outdoor unit of an air conditioner. The outdoor unit of the air conditioner includes: an outdoor unit housing, and an air outlet is provided on the outdoor unit housing; a wind blocking device, which is arranged at the air outlet and is used for adjusting the air outlet area of the air outlet; an outdoor heat exchanger, which is arranged in the outdoor unit housing and includes a heat exchange coil; and the control method includes:

[0007] Obtain the working mode of the air conditioner;

[0008] Judge whether the working mode is the cooling mode;

[0009] If so, obtain the detected value of the outdoor ambient temperature;

[0010] Judge whether the detected value of the outdoor ambient temperature is less than the first preset temperature;

[0011] If so, obtain the detected value of the heat exchange temperature of the heat exchange coil;

[0012] Adjust the opening degree of the wind blocking device according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature.

[0013] Further, the step of adjusting the opening degree of the wind blocking device according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature includes:

[0014] Determine the heat exchange temperature threshold corresponding to the outdoor ambient temperature detection value according to the corresponding relationship between the preset outdoor ambient temperature value and the heat exchange temperature threshold;

[0015] Judge whether the heat exchange temperature detection value is less than the corresponding heat exchange temperature threshold;

[0016] If so, adjust the opening degree of the wind blocking device according to the outdoor ambient temperature detection value.

[0017] Further, the step of adjusting the opening degree of the wind blocking device according to the outdoor ambient temperature detection value includes:

[0018] Obtain the corresponding relationship between the preset outdoor ambient temperature value and the preset opening degree;

[0019] Determine the target opening degree of the wind blocking device according to the corresponding relationship between the preset outdoor ambient temperature value and the preset opening degree, and adjust the opening degree of the wind blocking device to the target opening degree.

[0020] Further, the corresponding relationship between the outdoor ambient temperature value and the preset opening degree is set as:

[0021] The preset opening degree decreases as the outdoor ambient temperature value decreases step by step.

[0022] Further, the corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold is set as: the heat exchange temperature threshold decreases as the outdoor ambient temperature value decreases step by step.

[0023] Further, when the heat exchange temperature detection value is greater than or equal to the corresponding heat exchange temperature threshold, control the opening degree of the wind blocking device to be fully open.

[0024] Further, when the working mode is not the refrigeration mode and / or when the outdoor ambient temperature detection value is greater than or equal to the first preset temperature, control the opening degree of the wind blocking device to be fully open.

[0025] In particular, the present invention also provides an outdoor unit of an air conditioner, including: an outdoor unit housing, and an air outlet is provided on the outdoor unit housing; a wind blocking device, arranged at the air outlet for adjusting the air outlet area of the air outlet; an outdoor heat exchanger, arranged inside the outdoor unit housing and including a heat exchange coil; and a controller, the controller includes a memory and a processor, wherein the memory stores a machine-executable program, and when the machine-executable program is executed by the processor, it can implement the control method of the above-mentioned outdoor unit of the air conditioner.

[0026] Further, the outdoor unit of the air conditioner further includes:

[0027] A first temperature sensor for obtaining the outdoor ambient temperature detection value;

[0028] A second temperature sensor is disposed on the heat exchange coil for obtaining a detected value of the heat exchange temperature of the heat exchange coil.

[0029] Further, the wind blocking device includes:

[0030] A plurality of wind blocking plates, both ends of each wind blocking plate are rotatably connected to the air outlet, the plurality of wind blocking plates are arranged in parallel, and the sum of the single-side areas of the plurality of wind blocking plates is the same as the air outlet area of the air outlet.

[0031] Further, the wind blocking device further includes:

[0032] A transmission mechanism connected to the same ends of the plurality of wind blocking plates; and

[0033] A power mechanism disposed on the outdoor unit housing and connected to the transmission mechanism.

[0034] On the one hand, in the control method of the outdoor unit of the air conditioner of the present invention, by adjusting the opening degree of the wind blocking device according to the obtained detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, the air supply area of the air outlet of the outdoor unit can be adjusted. Therefore, by restricting the loss of heat of the heat exchange coil of the outdoor unit to the outside of the outdoor unit housing, the condensation temperature and condensation pressure of the air conditioner can be ensured, and at the same time, the situation of the air conditioner freezing protection shutdown is avoided, ensuring the normal operation of the air conditioner and ensuring the refrigeration capacity of the air conditioner in a low-temperature refrigeration environment. By obtaining two factors, namely the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, the change of the heat exchange coil temperature of the outdoor unit of the air conditioner and the influence of the outdoor ambient temperature on the heat exchange coil temperature can be reflected in a timely manner. Therefore, the opening degree of the wind blocking device can be adjusted in a timely manner. Further, by adjusting the opening degree of the wind blocking device with these two dual factors of the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, the fault tolerance situation that occurs when adjusting the wind blocking device with a single factor is avoided, ensuring that the control method can accurately control the adjustment of the opening degree of the wind blocking device.

[0035] Further, in the control method of the outdoor unit of the air conditioner of the present invention, when the detected value of the heat exchange temperature is less than the corresponding heat exchange temperature threshold, the opening degree of the wind blocking device is adjusted according to the detected value of the outdoor ambient temperature. It can be seen that by determining whether to adjust the opening degree of the wind blocking device through the detected value of the heat exchange temperature and the heat exchange temperature threshold, the action condition of the wind blocking device can be made more accurate and more in line with the actual operation situation of the outdoor unit of the air conditioner, further ensuring the refrigeration effect in the low-temperature refrigeration mode of the air conditioner.

[0036] Furthermore, in the control method of the outdoor unit of the air conditioner of the present invention, by presetting the corresponding relationship between the outdoor ambient temperature value and the preset opening degree, after adjusting the opening degree of the wind blocking device of the outdoor unit of the air conditioner, the condensation temperature and condensation pressure of the heat exchange coil of the outdoor unit are maintained within a reasonable range, ensuring the refrigeration effect of the air conditioner in a low-temperature environment.

[0037] On the other hand, in the outdoor unit of the air conditioner of the present invention, by arranging the wind blocking device at the air outlet of the outdoor unit housing, and then adjusting the air outlet area of the air outlet by controlling the opening degree of the wind blocking device, when the air conditioner is refrigerating at low temperature, the situation that the condensation temperature or condensation pressure of the outdoor unit is too low will not occur, ensuring the low-temperature refrigeration effect of the air conditioner and the normal operation of the air conditioner.

[0038] Through the following detailed description of specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0040] Figure 1 is a perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0041] Figure 2 is a schematic block diagram of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of a control method of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0043] Figure 4 is a control flowchart of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0044] Figure 5 is a control flowchart of an outdoor unit of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] In the description of this embodiment, it should be understood that the orientation or positional relationship indicated by the terms "upper", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature, that is, one or more such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0047] Unless otherwise clearly specified and defined, the terms "connected" and "arranged" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meaning of the above terms in the present invention according to specific circumstances.

[0048] Unless otherwise limited, all terms (including technical terms and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0049] In the description of this embodiment, the descriptions referring to terms such as "embodiment", "embodiment mode", "alternative embodiment", "alternative embodiment mode", "for example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0050] Figure 1 is a perspective view of the outdoor unit 100 of an air conditioner according to an embodiment of the present invention. The outdoor unit 100 of the air conditioner in this embodiment is installed on the wall of the outdoor space through the outdoor unit housing 200, and the outdoor unit housing 200 is used to accommodate and assemble the various components of the outdoor unit, for example, an outdoor heat exchanger, an outdoor fan 300, and an electric control component; and in order to realize the heat exchange between the outdoor heat exchanger and the outdoor environment, an air outlet 210 and an air inlet are provided on the outdoor unit housing 200. The outdoor fan 300 introduces the air flow in the outdoor environment from the air inlet into the outdoor unit housing 200 and flows through the heat exchanger to realize heat exchange, and discharges the air flow after heat exchange from the air outlet 210 out of the outdoor unit housing 200 into the outdoor environment.

[0051] In this embodiment, the outdoor heat exchanger is disposed inside the outdoor unit housing 200, and the outdoor heat exchanger includes a heat exchange coil and heat exchange fins. The refrigerant inside the air conditioner outdoor unit 100 flows through the heat exchange coil, enabling heat transfer between the refrigerant and the heat exchange coil. Moreover, the heat exchange coil exchanges heat with the air flow introduced into the outdoor unit housing 200, and the heat exchange fins further increase the contact area between the heat exchange coil and the air flow, enhancing the heat exchange efficiency and effect.

[0052] In this embodiment, the wind deflector device 400 is disposed at the air outlet 210, and the wind deflector device 400 is used to adjust the air outlet area of the air outlet 210. Specifically, by adjusting the opening degree of the wind deflector device 400, when the air outlet area of the air outlet 210 is decreased, the amount of air flow flowing out of the outdoor unit housing 200 through the air outlet 210 after exchanging heat with the outdoor heat exchanger is reduced.

[0053] When the air conditioner is in low-temperature refrigeration, the temperature difference between the air flow in the outdoor environment and the temperature of the heat exchange coil is relatively large. At this time, the heat exchange speed between the heat exchange coil and the heat exchange air flow is fast, and the heat release effect of the heat exchange coil is good. As a result, the temperature or pressure of the coil is too low. If the opening degree of the wind deflector device 400 is adjusted, the air flow carrying heat after exchanging heat with the heat exchanger will retain the heat inside the outdoor unit housing 200, ensuring the temperature inside the outdoor unit housing 200, reducing the heat exchanged from the heat exchange coil to the outdoor space, and thus being able to ensure the condensation temperature and condensation pressure of the heat exchange coil. The situation where the condensation temperature or condensation pressure of the air conditioner outdoor unit 100 is too low will not occur. Therefore, the heat exchanger in the air conditioner indoor unit will not freeze, and the air conditioner will not protect and shut down, ensuring the normal operation of the air conditioner and further ensuring the refrigeration effect of the air conditioner in low-temperature conditions.

[0054] In this embodiment, the wind deflector device 400 includes a plurality of wind deflector plates 430, and both ends of each wind deflector plate 430 are rotatably connected to the air outlet 210.

[0055] Rotating shafts can be provided at both ends of the wind deflector plate 430, and the rotating shafts are inserted into the rotating slots on the outdoor unit housing 200, thereby realizing the rotatable connection of each wind deflector plate 430 to the air outlet 210.

[0056] The plurality of wind deflector plates 430 are arranged in parallel. During the rotation of the wind deflector plates 430, their parallel arrangement can ensure the action consistency of the plurality of wind deflector plates 430 and, at the same time, ensure the effectiveness of the restriction of the air flow flowing out of the air outlet 210 by the plurality of wind deflector plates 430. The sum of the unilateral areas of the plurality of wind deflector plates 430 is the same as the air outlet area of the air outlet 210, ensuring that when the opening degree of the wind deflector device 400 is fully closed, the plurality of wind deflector plates 430 can completely cover the air outlet 210.

[0057] The wind deflector device 400 further includes a transmission mechanism 420 and a power mechanism 410. The transmission mechanism 420 is connected to the same ends of a plurality of wind deflectors 430. The power mechanism 410 is disposed on the outdoor unit housing 200. On the one hand, the power mechanism 410 is connected to the transmission mechanism 420, and the driving force on the power mechanism 410 can be transmitted to each wind deflector 430 through the transmission mechanism 420. On the other hand, the power mechanism 410 can be connected to any one of the wind deflectors 430. The driving force of the power mechanism 410 is first transmitted to any one of the wind deflectors 430, and the wind deflector 430 drives the transmission mechanism 420 to move, thereby driving all the wind deflectors 430 to rotate.

[0058] The wind deflector 430 can be a plate body; the power mechanism 410 can be a driving motor; the transmission mechanism 420 can be a connecting rod, and the transmission mechanism 420 can also be replaced by a gear set or other structures that can realize the transmission of the power of the power mechanism 410 to the wind deflector 430 to drive the wind deflector 430 to rotate, all of which are within the protection scope of the present invention.

[0059] Figure 2 It is a schematic block diagram of an outdoor unit 100 of an air conditioner according to an embodiment of the present invention. The outdoor unit 100 of the air conditioner in this embodiment further includes a first temperature sensor 510 and a second temperature sensor 520. The first temperature sensor 510 is used to obtain the detection value of the outdoor ambient temperature, and the first temperature sensor 510 can be disposed on the housing of the outdoor unit; the second temperature sensor 520 is disposed on the heat exchange coil to obtain the detection value of the heat exchange temperature of the heat exchange coil.

[0060] In this embodiment, the controller 600 includes a memory 620 and a processor 610. The memory 620 stores a machine-executable program 621. When the machine-executable program 621 is executed by the processor 610, it can implement the control method of the outdoor unit 100 of the air conditioner in the following embodiments.

[0061] In a specific embodiment of this embodiment, the first temperature sensor 510, the second temperature sensor 520, and the driving motor are electrically connected to the controller 600.

[0062] The processor 610 in this embodiment can be a central processing unit (CPU), or a digital signal processing unit (DSP), etc. The memory 620 is used to store the program executed by the processor 610. The memory 620 can be any medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 620 can also be a combination of various memories 620. Since the machine-executable program realizes the respective processes of the following method embodiments when executed by the processor 610 and can achieve the same technical effects, to avoid repetition, it will not be described in detail here.

[0063] The operation process of the outdoor unit 100 of the air conditioner will be further described below in conjunction with the control method of the outdoor unit 100 of the air conditioner in this embodiment.

[0064] Figure 3 It is a schematic diagram of the control method of the outdoor unit 100 of the air conditioner according to an embodiment of the present invention. This control method generally may include:

[0065] S302, obtain the working mode of the air conditioner.

[0066] S304, determine whether the working mode is the cooling mode.

[0067] S306, if so, obtain the detected value of the outdoor ambient temperature.

[0068] S308, determine whether the detected value of the outdoor ambient temperature is less than the first preset temperature.

[0069] S310, if so, obtain the detected value of the heat exchange temperature of the heat exchange coil.

[0070] S312, adjust the opening degree of the wind deflector 400 according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature.

[0071] In this embodiment, by adjusting the opening degree of the wind deflector 400 according to the obtained detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, the air supply area of the air outlet 210 of the outdoor unit can be adjusted. Therefore, the heat loss of the heat exchange coil of the outdoor unit to the outside of the outdoor unit housing 200 can be restricted, and thus the condensation temperature and condensation pressure of the air conditioner can be ensured, and the refrigeration capacity of the air conditioner in a low-temperature refrigeration environment can be ensured.

[0072] Moreover, by adjusting the opening degree of the wind deflector 400 with these two dual factors of the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, it is avoided to adjust the area of the air outlet 210 by controlling the action of the wind deflector 400 in advance due to inaccurate detection of a single factor. This will cause the condensation temperature and condensation pressure of the heat exchange coil of the outdoor unit to be too high in a low-temperature refrigeration environment of the air conditioner, resulting in insufficient cooling capacity of the indoor unit of the air conditioner and a decline in the refrigeration effect; or to adjust the area of the air outlet 210 by controlling the action of the wind deflector 400 too late due to inaccurate detection of a single factor. In this way, it still cannot improve or avoid the situation that the condensation temperature or condensation pressure of the outdoor unit 100 of the air conditioner is too low in a low-temperature refrigeration environment. Therefore, by adjusting the opening degree of the wind deflector 400 with these two dual factors of the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature, the fault tolerance situation caused by adjusting the wind deflector 400 by a single factor can be avoided, and it is ensured that this control method can accurately control the wind deflector 400 to adjust the opening degree.

[0073] Figure 4It is a control flow chart of the outdoor unit 100 of an air conditioner according to an embodiment of the present invention. In a specific embodiment, step S312 of adjusting the opening degree of the wind deflector 400 according to the heat exchange temperature detection value and the outdoor ambient temperature detection value includes:

[0074] S402, determining the heat exchange temperature threshold corresponding to the outdoor ambient temperature detection value according to the corresponding relationship between the preset outdoor ambient temperature value and the heat exchange temperature threshold.

[0075] S404, judging whether the heat exchange temperature detection value is less than the corresponding heat exchange temperature threshold.

[0076] S406, if so, adjusting the opening degree of the wind deflector 400 according to the outdoor ambient temperature detection value.

[0077] When the air conditioner operates in the low-temperature cooling mode, in order to ensure that the indoor unit of the air conditioner does not stop due to freezing protection, the heat exchange coil of the outdoor unit needs to reach a certain heat exchange temperature range within different outdoor ambient temperature ranges. The temperature of the heat exchange coil needs to be greater than the minimum temperature value within the heat exchange temperature range. Thus, there is a certain corresponding relationship between the range of the outdoor ambient temperature value and the heat exchange temperature range where the heat exchange temperature threshold of the heat exchange coil of the outdoor unit is located. Further, there is a corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold of the heat exchange coil of the outdoor unit. Therefore, the heat exchange temperature threshold corresponding to the outdoor ambient temperature detection value can be determined according to the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold. That is, when the outdoor unit of the air conditioner is actually operating, the heat exchange temperature threshold corresponding to the current outdoor ambient detection value can be determined through the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold. Further, the determination condition for whether to adjust the wind deflector 400 is obtained: judging whether the heat exchange temperature detection value is less than the corresponding heat exchange temperature threshold.

[0078] When the heat exchange temperature detection value is less than the corresponding heat exchange temperature threshold, it means that the temperature of the heat exchange coil of the current outdoor unit 100 of the air conditioner cannot reach the heat exchange temperature threshold for the indoor unit of the air conditioner not to stop due to freezing protection. At this time, it is necessary to control the wind deflector 400 to act and adjust the air outlet area of the air outlet 210, that is, adjust the opening degree of the wind deflector 400.

[0079] Since the heat exchange temperature detection value is the value obtained from the heat exchange coil of the outdoor unit during operation, it can be understood that judging whether to adjust the opening degree of the wind deflector 400 through the heat exchange temperature detection value and the heat exchange temperature threshold can make the action condition for the wind deflector 400 to adjust the air outlet area of the air outlet 210 more accurate and more in line with the actual operation situation of the outdoor unit 100 of the air conditioner, further ensuring the refrigeration effect in the low-temperature cooling mode of the air conditioner.

[0080] In a specific embodiment, an implementation manner of the correspondence between the outdoor ambient temperature value and the heat exchange temperature threshold is set such that the heat exchange temperature threshold decreases as the outdoor ambient temperature value decreases step by step.

[0081] It can be understood that the step-by-step decrease in the outdoor ambient temperature value is manifested as a magnitude relationship between different ranges of outdoor ambient temperature values, and the overall of the latter range of outdoor ambient temperature values is smaller than the overall of the former range of outdoor ambient temperature values.

[0082] For example, the correspondence between the outdoor ambient temperature value and the heat exchange temperature threshold is as follows: the outdoor ambient temperature value includes a first preset value, a second preset value, a third preset value, a fourth preset value, and a fifth preset value, and the first preset value is greater than the second preset value, the second preset value is greater than the third preset value, the third preset value is greater than the fourth preset value, and the fourth preset value is greater than the fifth preset value; the heat exchange temperature threshold includes a first heat exchange temperature, a second heat exchange temperature, a third heat exchange temperature, and a fourth heat exchange temperature, and the first heat exchange temperature is greater than the second heat exchange temperature, the second heat exchange temperature is greater than the third heat exchange temperature, and the third heat exchange temperature is greater than the fourth heat exchange temperature; when the detected outdoor ambient temperature value is less than the first preset value and greater than or equal to the second preset value, the corresponding heat exchange temperature threshold is the first heat exchange temperature; when the detected outdoor ambient temperature value is less than the second preset value and greater than or equal to the third preset value, the corresponding heat exchange temperature threshold is the second heat exchange temperature; when the detected outdoor ambient temperature value is less than the third preset value and greater than or equal to the fourth preset value, the corresponding heat exchange temperature threshold is the third heat exchange temperature; when the detected outdoor ambient temperature value is less than the fourth preset value and greater than or equal to the fifth preset value, the corresponding heat exchange temperature threshold is the fourth heat exchange temperature.

[0083] In this embodiment, the first preset value can be 10°C, the second preset value can be 0°C, the third preset value can be -10°C, the fourth preset value can be -20°C, and the fifth preset value can be -30°C; the first heat exchange temperature can be 40°C, the second heat exchange temperature can be 35°C, the third heat exchange temperature can be 30°C, and the fourth heat exchange temperature can be 25°C.

[0084] In a specific embodiment, an implementation manner of adjusting the opening degree of the windshield device 400 according to the detected outdoor ambient temperature value. Step S406 of adjusting the opening degree of the windshield device 400 according to the detected outdoor ambient temperature value includes:

[0085] Obtain the correspondence between the preset outdoor ambient temperature value and the preset opening degree.

[0086] Determine the target opening degree of the windshield device 400 according to the correspondence between the preset outdoor ambient temperature value and the preset opening degree, and adjust the opening degree of the windshield device 400 to the target opening degree.

[0087] In order to ensure that the indoor unit of the air conditioner does not stop due to freeze protection, it is necessary to raise the operating temperature of the heat exchange coil of the outdoor unit (i.e., the heat exchange temperature detection value) to the heat exchange temperature threshold corresponding to the outdoor ambient temperature value, so as to ensure the refrigeration capacity of the air conditioner. However, if the operating temperature of the heat exchange coil is too high, it will also affect the refrigeration effect of the air conditioner. Therefore, it is necessary to adjust the opening degree of the wind deflector 400 to keep the operating temperature of the heat exchange coil within the heat exchange range where the heat exchange temperature threshold is located. Moreover, there is a corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold. Specifically, there is a corresponding relationship between the range of the outdoor ambient temperature value and the heat exchange temperature range where the heat exchange temperature threshold of the heat exchange coil of the outdoor unit is located. Therefore, the target opening degree of the wind deflector 400 can be determined according to the corresponding relationship between the preset outdoor ambient temperature value and the preset opening degree, and the opening degree of the wind deflector 400 can be adjusted to the target opening degree. By presetting the corresponding relationship between the outdoor ambient temperature value and the preset opening degree in advance, after adjusting the opening degree of the wind deflector of the outdoor unit of the air conditioner, the condensation temperature and condensation pressure of the heat exchange coil of the outdoor unit can be maintained within a reasonable range, ensuring the refrigeration effect of the air conditioner in a low-temperature environment.

[0088] In an implementation manner of the corresponding relationship between the outdoor ambient temperature value and the preset opening degree in this specific embodiment, the corresponding relationship between the outdoor ambient temperature value and the preset opening degree is set as: the preset opening degree decreases as the outdoor ambient temperature value decreases step by step.

[0089] It can be understood that the step-by-step decrease of the outdoor ambient temperature value is manifested as a size relationship between different ranges of the outdoor ambient temperature values, and the overall of the latter range of the outdoor ambient temperature value is smaller than the overall of the former range of the outdoor ambient temperature value.

[0090] For example, the correspondence between the outdoor ambient temperature value and the heat exchange temperature threshold is as follows: the outdoor ambient temperature value includes a first preset value, a second preset value, a third preset value, a fourth preset value, and a fifth preset value, and the first preset value is greater than the second preset value, the second preset value is greater than the third preset value, the third preset value is greater than the fourth preset value, and the fourth preset value is greater than the fifth preset value; the opening degree of the wind blocking device 400 includes fully open, a first opening degree, a second opening degree, a third opening degree, and a fourth opening degree, and the fully open state is greater than the first opening degree, the first opening degree is greater than the second opening degree, the second opening degree is greater than the third opening degree, and the third opening degree is greater than the fourth opening degree; when the detected value of the outdoor ambient temperature is less than the first preset value and greater than or equal to the second preset value, the corresponding opening degree of the wind blocking device 400 is the first opening degree; when the detected value of the outdoor ambient temperature is less than the second preset value and greater than or equal to the third preset value, the corresponding opening degree of the wind blocking device 400 is the second opening degree; when the detected value of the outdoor ambient temperature is less than the third preset value and greater than or equal to the fourth preset value, the corresponding opening degree of the wind blocking device 400 is the third opening degree; when the detected value of the outdoor ambient temperature is less than the fourth preset value and greater than or equal to the fifth preset value, the corresponding opening degree of the wind blocking device 400 is the fourth opening degree.

[0091] Figure 5 It is a control flow chart of the outdoor unit 100 of the air conditioner according to an embodiment of the present invention. In yet another specific embodiment, step S312 of adjusting the opening degree of the wind blocking device 400 according to the heat exchange temperature detection value and the outdoor ambient temperature detection value includes:

[0092] S502, determining the heat exchange temperature threshold corresponding to the detected value of the outdoor ambient temperature according to the preset correspondence between the outdoor ambient temperature value and the heat exchange temperature threshold.

[0093] S504, determining whether the heat exchange temperature detection value is less than the corresponding heat exchange temperature threshold.

[0094] S506, if so, adjusting the opening degree of the wind blocking device 400 according to the heat exchange temperature threshold.

[0095] When the air conditioner operates in the cooling mode at low temperature, in order to ensure that the indoor unit of the air conditioner does not stop due to freezing protection, the heat exchange coil of the outdoor unit needs to reach a certain heat exchange temperature range within different outdoor ambient temperature ranges. The temperature of the heat exchange coil needs to be greater than the minimum temperature value within the heat exchange temperature range. Thus, there is a certain corresponding relationship between the range of the outdoor ambient temperature value and the heat exchange temperature range where the heat exchange temperature threshold of the outdoor unit's heat exchange coil is located. Further, there is a corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold of the outdoor unit's heat exchange coil. Therefore, the heat exchange temperature threshold corresponding to the detected outdoor ambient temperature value can be determined according to the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold. That is, when the outdoor unit of the air conditioner is actually operating, the heat exchange temperature threshold corresponding to the current outdoor ambient detection value can be determined through the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold. Further, the determination condition for whether to adjust the wind deflector 400 is obtained: determine whether the detected heat exchange temperature value is less than the corresponding heat exchange temperature threshold.

[0096] When the detected heat exchange temperature value is less than the corresponding heat exchange temperature threshold, it means that the temperature of the heat exchange coil of the current outdoor unit 100 of the air conditioner cannot reach the heat exchange temperature threshold at which the indoor unit of the air conditioner does not stop due to freezing protection. At this time, it is necessary to control the wind deflector 400 to act and adjust the air outlet area of the air outlet 210, that is, adjust the opening degree of the wind deflector 400.

[0097] Since the detected heat exchange temperature value is obtained based on the heat exchange coil of the outdoor unit during operation, it can be understood that determining whether to adjust the opening degree of the wind deflector 400 through the detected heat exchange temperature value and the heat exchange temperature threshold can make the action condition for the wind deflector 400 to adjust the air outlet area of the air outlet 210 more accurate and more in line with the actual operating conditions of the outdoor unit 100 of the air conditioner, further ensuring the cooling effect in the low-temperature cooling mode of the air conditioner.

[0098] In an implementation manner of the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold in this specific embodiment, the preset corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold is set as: the heat exchange temperature threshold decreases as the outdoor ambient temperature value decreases step by step.

[0099] It can be understood that the step-by-step decrease in the outdoor ambient temperature value is manifested as a size relationship between different ranges of outdoor ambient temperature values, and the overall of the latter outdoor ambient temperature value range is smaller than the overall of the former outdoor ambient temperature value range.

[0100] For example, the correspondence between the outdoor ambient temperature value and the heat exchange temperature threshold is as follows: the outdoor ambient temperature value includes a first preset value, a second preset value, a third preset value, a fourth preset value, and a fifth preset value, and the first preset value is greater than the second preset value, the second preset value is greater than the third preset value, the third preset value is greater than the fourth preset value, and the fourth preset value is greater than the fifth preset value; the heat exchange temperature threshold includes a first heat exchange temperature, a second heat exchange temperature, a third heat exchange temperature, and a fourth heat exchange temperature, and the first heat exchange temperature is greater than the second heat exchange temperature, the second heat exchange temperature is greater than the third heat exchange temperature, and the third heat exchange temperature is greater than the fourth heat exchange temperature; when the detected value of the outdoor ambient temperature is less than the first preset value and greater than the second preset value, the corresponding heat exchange temperature threshold is the first heat exchange temperature; when the detected value of the outdoor ambient temperature is less than the second preset value and greater than the third preset value, the corresponding heat exchange temperature threshold is the second heat exchange temperature; when the detected value of the outdoor ambient temperature is less than the third preset value and greater than the fourth preset value, the corresponding heat exchange temperature threshold is the third heat exchange temperature; when the detected value of the outdoor ambient temperature is less than the fourth preset value and greater than the fifth preset value, the corresponding heat exchange temperature threshold is the fourth heat exchange temperature.

[0101] In this embodiment, the first preset value can be 10 °C, the second preset value can be 0 °C, the third preset value can be -10 °C, the fourth preset value can be -20 °C, and the fifth preset value can be -30 °C; the first heat exchange temperature can be 35 °C, the second heat exchange temperature can be 30 °C, the third heat exchange temperature can be 25 °C, and the fourth heat exchange temperature can be 20 °C.

[0102] In an embodiment of adjusting the opening degree of the windshield device 400 according to the heat exchange temperature threshold in this specific embodiment, the steps of adjusting the opening degree of the windshield device 400 according to the heat exchange temperature threshold include:

[0103] Obtain the correspondence between the preset heat exchange temperature threshold and the preset opening degree.

[0104] Determine the target opening degree of the windshield device 400 according to the correspondence between the preset heat exchange temperature threshold and the preset opening degree, and adjust the opening degree of the windshield device 400 to the target opening degree.

[0105] In order to ensure that the indoor unit of the air conditioner does not experience freeze protection shutdown, it is necessary to raise the operating temperature of the heat exchange coil of the outdoor unit (i.e., the detected heat exchange temperature) to the heat exchange temperature threshold corresponding to the outdoor ambient temperature value, which can ensure the refrigeration capacity of the air conditioner. However, if the operating temperature of the heat exchange coil is too high, it will also affect the refrigeration effect of the air conditioner. Therefore, it is necessary to adjust the opening degree of the wind deflector 400 to maintain the operating temperature of the heat exchange coil (i.e., the detected heat exchange temperature) within the heat exchange range where the heat exchange temperature threshold is located. Therefore, the target opening degree of the wind deflector 400 can be determined according to the corresponding relationship between the preset heat exchange temperature threshold and the preset opening degree, and the opening degree of the wind deflector 400 can be adjusted to the target opening degree. By presetting the corresponding relationship between the heat exchange temperature threshold and the preset opening degree, after the opening degree of the wind deflector of the outdoor unit of the air conditioner is adjusted, the condensation temperature and condensation pressure of the heat exchange coil of the outdoor unit are maintained within a reasonable range, ensuring the refrigeration effect of the air conditioner in a low-temperature environment.

[0106] In an implementation manner of the corresponding relationship between the heat exchange temperature threshold and the preset opening degree in this specific embodiment, the corresponding relationship between the preset heat exchange temperature threshold and the preset opening degree is set as: the preset opening degree decreases as the heat exchange temperature threshold decreases.

[0107] For example, the corresponding relationship between the heat exchange temperature threshold and the preset opening degree is as follows: the heat exchange temperature threshold includes a first heat exchange temperature, a second heat exchange temperature, a third heat exchange temperature, a fourth heat exchange temperature, and a fifth heat exchange temperature, and the fifth heat exchange temperature is greater than the first heat exchange temperature, the first heat exchange temperature is greater than the second heat exchange temperature, the second heat exchange temperature is greater than the third heat exchange temperature, and the third heat exchange temperature is greater than the fourth heat exchange temperature; the opening degree of the wind deflector 400 includes fully open, a first opening degree, a second opening degree, a third opening degree, and a fourth opening degree, and fully open is greater than the first opening degree, the first opening degree is greater than the second opening degree, the second opening degree is greater than the third opening degree, and the third opening degree is greater than the fourth opening degree; when the heat exchange temperature threshold is the first heat exchange temperature (the corresponding heat exchange temperature range where the heat exchange temperature threshold is located is greater than or equal to the first heat exchange temperature and less than the fifth heat exchange temperature), the corresponding opening degree of the wind deflector 400 is the first opening degree; when the heat exchange temperature threshold is the second heat exchange temperature (the corresponding heat exchange temperature range where the heat exchange temperature threshold is located is greater than or equal to the second heat exchange temperature and less than the first heat exchange temperature), the corresponding opening degree of the wind deflector 400 is the second opening degree; when the heat exchange temperature threshold is the third heat exchange temperature (the corresponding heat exchange temperature range where the heat exchange temperature threshold is located is greater than or equal to the third heat exchange temperature and less than the second heat exchange temperature), the corresponding opening degree of the wind deflector 400 is the third opening degree; when the heat exchange temperature threshold is the fourth heat exchange temperature (the corresponding heat exchange temperature range where the heat exchange temperature threshold is located is greater than or equal to the fourth heat exchange temperature and less than the third heat exchange temperature), the corresponding opening degree of the wind deflector 400 is the fourth opening degree.

[0108] In this specific embodiment, the fifth heat exchange temperature can be 40°C.

[0109] In this embodiment, when the detected heat exchange temperature is greater than or equal to the corresponding heat exchange temperature threshold, the opening degree of the wind deflector 400 is controlled to be fully open.

[0110] In this embodiment, when the working mode is not the refrigeration mode and / or when the detected outdoor ambient temperature is greater than or equal to the first preset temperature, the opening degree of the wind deflector 400 is controlled to be fully open.

[0111] It can be understood that when the working mode is not the refrigeration mode, the opening degree of the wind deflector 400 is controlled to be fully open; and when the detected heat exchange temperature is greater than or equal to the corresponding heat exchange temperature threshold, the opening degree of the wind deflector 400 is controlled to be fully open, which can ensure the heat exchange effect between the heat exchange coil and the air flow in the outdoor space.

[0112] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. A control method for an outdoor unit of an air conditioner, wherein, The outdoor unit of the air conditioner includes: an outdoor unit housing, and an air outlet is provided on the outdoor unit housing; a wind blocking device, which is arranged at the air outlet and is used to adjust the air outlet area of the air outlet; an outdoor heat exchanger, which is arranged in the outdoor unit housing and includes a heat exchange coil; and the control method includes: Obtain the working mode of the air conditioner; Judge whether the working mode is a refrigeration mode; If so, obtain the detected value of the outdoor ambient temperature; Judge whether the detected value of the outdoor ambient temperature is less than a first preset temperature; If so, obtain the detected value of the heat exchange temperature of the heat exchange coil; Adjust the opening degree of the wind blocking device according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature; The step of adjusting the opening degree of the wind blocking device according to the detected value of the heat exchange temperature and the detected value of the outdoor ambient temperature includes: Determine the heat exchange temperature threshold value corresponding to the detected value of the outdoor ambient temperature according to the corresponding relationship between the preset outdoor ambient temperature value and the heat exchange temperature threshold value; Judge whether the detected value of the heat exchange temperature is less than the corresponding heat exchange temperature threshold value; If so, adjust the opening degree of the wind blocking device according to the detected value of the outdoor ambient temperature; If not, control the opening degree of the wind blocking device to be fully open.

2. The control method of the outdoor unit of the air conditioner according to claim 1, wherein, The step of adjusting the opening degree of the wind blocking device according to the detected value of the outdoor ambient temperature includes: Obtain the corresponding relationship between the preset outdoor ambient temperature value and the preset opening degree; Determine the target opening degree of the wind blocking device according to the corresponding relationship between the preset outdoor ambient temperature value and the preset opening degree, and adjust the opening degree of the wind blocking device to the target opening degree.

3. The control method of the outdoor unit of the air conditioner according to claim 2, wherein, The corresponding relationship between the outdoor ambient temperature value and the preset opening degree is set as: The preset opening degree decreases as the stepwise decrease of the outdoor ambient temperature value.

4. The control method of the outdoor unit of the air conditioner according to claim 1, wherein, The corresponding relationship between the outdoor ambient temperature value and the heat exchange temperature threshold value is set as: The heat exchange temperature threshold value decreases as the stepwise decrease of the outdoor ambient temperature value.

5. The control method of the outdoor unit of the air conditioner according to claim 1, wherein, In the case where the working mode is not the refrigeration mode and / or in the case where the detected value of the outdoor ambient temperature is greater than or equal to the first preset temperature, control the opening degree of the wind blocking device to be fully open.

6. An outdoor unit of an air conditioner, comprising: An outdoor unit housing, and an air outlet is provided on the outdoor unit housing; a wind blocking device, which is arranged at the air outlet and is used to adjust the air outlet area of the air outlet; An outdoor heat exchanger, which is arranged in the outdoor unit housing and includes a heat exchange coil; and A controller, the controller includes a memory and a processor, wherein the memory stores a machine-executable program, and when the machine-executable program is executed by the processor, it realizes the control method of the outdoor unit of the air conditioner according to any one of claims 1 to 5.

7. The outdoor unit of the air conditioner according to claim 6, wherein, The outdoor unit of the air conditioner further includes: A first temperature sensor, which is used to obtain the detected value of the outdoor ambient temperature; A second temperature sensor, which is arranged on the heat exchange coil and is used to obtain the detected value of the heat exchange temperature of the heat exchange coil.

8. The outdoor unit of an air conditioner according to claim 6, wherein, The wind blocking device includes: A plurality of wind deflectors, both ends of each of the wind deflectors are rotatably connected to the air outlet, the plurality of wind deflectors are arranged in parallel, and the sum of the unilateral areas of the plurality of wind deflectors is the same as the air outlet area of the air outlet; A transmission mechanism, connected to the same ends of the plurality of wind deflectors; and A power mechanism, arranged on the outdoor unit housing and connected to the transmission mechanism.

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