Air conditioning system and control method thereof

Abstract

The invention relates to an air conditioning system, in particular to an air conditioning system and a control method thereof, and aims to solve the problem of wind resistance generated by an existing grating and the problem of preventing interferents from entering an outdoor unit. In order to achieve the purpose, according to the control method of the air conditioning system, the air conditioning system comprises an outdoor unit, the outdoor unit comprises a grating, the size of a gap of the grating is adjustable, the grating is arranged at an air opening of the outdoor unit, and the control method comprises the following steps that the size of the gap of the grating is determined according to whether interferents exist at the air opening or not. The size of the grille gap can be adjusted by detecting whether the interferent exists at the air opening or not, when it is detected that the interferent approaches the air opening, the system automatically shrinks the grille gap, and therefore the interferent is effectively prevented from entering the outdoor unit, and possible damage and safety risks are avoided.

Description

Technical Field

[0001] The invention relates to an air conditioning system, and in particular provides an air conditioning system and a control method thereof. Background Art

[0002] The outdoor unit of the air conditioning system is usually equipped with a heat exchanger to exchange heat with the outdoor air to achieve cooling or heating functions. To enhance the heat exchange efficiency and ensure normal operation, the fan is installed near the heat exchanger to accelerate the air flow. When the air conditioning system is under heavy load or the outside temperature is high, the fan needs to increase the speed to quickly remove the heat. In order to protect the fan from foreign objects such as fallen leaves or debris, a grille is usually installed on the outside of the fan. However, the grille will generate wind resistance when the air circulates, especially when the fan speed increases, which restricts the air flow, affects the heat exchange efficiency, and causes the system energy efficiency ratio to decrease. In order to reduce wind resistance, the existing technology attempts to reduce resistance by increasing the gap between the grilles or designing a sparse structure, but this will weaken the protection effect, making it easier for interference to enter the fan area, increasing the risk of damage and maintenance costs.

[0003] Therefore, there is an urgent need in the art for an air conditioning system and a control method thereof to solve the above problems. Summary of the invention

[0004] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing grille effectively blocks interference objects from entering the outdoor unit.

[0005] In a first aspect, the present invention provides a control method for an air conditioning system, the air conditioning system comprising an outdoor unit, the outdoor unit comprising a grille, the gap size of the grille is adjustable, the grille is arranged at the air outlet of the outdoor unit, the control method comprising the following steps:

[0006] The size of the gap of the grille is determined according to whether there is an interfering object at the air outlet.

[0007] In a specific implementation of the above control method, “determining the gap size of the grille according to whether there is an interference object at the air outlet” includes the following steps:

[0008] If there is an interference at the air outlet, the gap of the grille is reduced.

[0009] In a specific implementation of the above control method, "determining the gap size of the grille according to whether there is an interference object at the air outlet" further includes the following steps:

[0010] After the gap of the grille is reduced, the size of the gap of the grille is determined again according to whether the interference object continues to extend into the air outlet.

[0011] In a specific implementation of the above control method, “determining the gap size of the grille according to whether the interference object continues to extend into the air outlet” includes the following steps:

[0012] If the interfering object continues to extend into the interior of the air outlet, the gap of the grille is reduced again.

[0013] In a specific implementation of the above control method, the outdoor unit further includes a fan, and the control method further includes the following steps:

[0014] The rotation speed of the fan is determined according to the heat exchange performance of the air conditioning system.

[0015] In a specific implementation of the above control method, “determining the speed of the fan according to the heat exchange performance of the air conditioner” includes the following steps:

[0016] If the heat exchange performance of the air conditioning system is greater than an upper limit of a first preset range, reducing the speed of the fan;

[0017] If the heat exchange performance of the air conditioning system is less than a lower limit of the first preset range, the rotation speed of the fan is increased.

[0018] In a specific implementation of the above control method, “determining the gap size of the grille according to whether there is an interference object at the air outlet” includes the following steps:

[0019] When there is no interference at the air outlet and the heat exchange performance of the air conditioning system is within a first preset range, the gap size of the grille is determined according to the wind pressure at the air outlet.

[0020] In a specific implementation of the above control method, “determining the gap size of the grille according to the wind pressure at the air outlet” includes the following steps:

[0021] If the wind pressure is greater than an upper limit of a second preset range, increasing the gap of the grille;

[0022] If the wind pressure is less than a lower limit of the second preset range, the gap of the grille is reduced.

[0023] In a specific implementation of the above control method, the amplitude of adjusting the grille gap according to whether there is an interference at the air outlet is greater than the amplitude of adjusting the grille gap according to the wind pressure at the air outlet.

[0024] In a second aspect, the present invention provides an air conditioning system, which includes a control module, wherein the control module is configured to execute the above control method.

[0025] When adopting the above-mentioned technical solution, the present invention can adjust the size of the grille gap by detecting whether there is an interference at the air outlet. When it is detected that the interference is approaching the air outlet, the system automatically reduces the grille gap, thereby effectively preventing the interference from entering the interior of the outdoor unit and avoiding possible damage and safety risks.

[0026] Furthermore, after the interference is detected and the grille gap is narrowed, it is detected again whether the interference continues to extend into the air port. If the interference continues to extend into the air port, the grille gap is further narrowed to block the interference.

[0027] Furthermore, the present invention can dynamically adjust the fan speed according to the heat exchange performance of the air-conditioning system. When the heat exchange performance is too high, the energy consumption is reduced by lowering the fan speed; when the heat exchange performance is too low, the fan speed is increased to enhance air flow, thereby quickly improving the heat exchange effect.

[0028] Furthermore, when there is no interference at the air outlet and the heat exchange performance of the air-conditioning system is moderate, the fan speed does not need to be adjusted. At this time, the grille gap is intelligently adjusted according to the wind pressure at the air outlet to balance the wind resistance generated by the grille and the effect of the grille blocking interference, thereby optimizing the heat exchange efficiency of the outdoor unit.

[0029] Furthermore, the present invention also intelligently adjusts the grille gap by detecting the wind pressure at the air outlet. When the wind pressure is high, the grille gap is increased to reduce the wind resistance caused by grille obstruction, thereby ensuring the ventilation effect of the fan at an appropriate speed; when the wind pressure is low, the grille gap is automatically reduced to effectively block external interference from entering the system.

[0030] Furthermore, the present invention adjusts the grille gap according to the wind pressure at the air outlet less than the grille gap according to whether there is an interference at the air outlet. When an interference is detected at the air outlet, the system reduces the grille gap by a larger margin, effectively preventing the interference from entering the outdoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0032] Figure 1 It is a structural schematic diagram of an outdoor unit provided by the present invention;

[0033] Figure 2 is a schematic diagram of the structure of the grille provided by the present invention, in which the gap of the grille is in a reduced state;

[0034] Figure 3 is a schematic diagram of the structure of the grille provided by the present invention, in which the gap of the grille is in an expanded state;

[0035] Figure 4 is a flow chart of the control method in Embodiment 1 provided by the present invention;

[0036] Figure 5 is a flow chart of the control method in the second embodiment provided by the present invention;

[0037] Figure 6 is a flow chart of the control method in Embodiment 3 provided by the present invention;

[0038] Figure 7 is a flow chart of the control method in the fourth embodiment provided by the present invention;

[0039] Figure 8 It is a flow chart of the control method in Embodiment 5 provided by the present invention.

[0040] List of reference numerals:

[0041] 1. Fan; 2. Grille; 3. Casing; 4. Interference detection component. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0043] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In order to solve the problem that the existing grille effectively blocks interference objects from entering the outdoor unit, this embodiment discloses an air conditioning system, which includes an outdoor unit. Figure 1The outdoor unit includes a housing 3, a fan 1, a grille 2, a wind pressure detection member (not shown in the figure), and an interference detection member 4. An air outlet is provided on the outer wall of the housing 3, and the air outlet communicates the inside and the outside of the housing 3. The fan 1 is arranged inside the housing 3, the fan 1 is arranged toward the air outlet of the housing 3, and the grille 2 is arranged at the air outlet.

[0046] The gap size of the grille 2 can be adjusted. Figure 2 and Figure 3 , the grille assembly includes a fixing part, an adjusting part and an elastic grille net. A supporting rib is provided at the air outlet, and the supporting rib is in the shape of a cross, and the center of the cross-shaped supporting rib is arranged at the center of the air outlet. The fixing part is fixedly arranged at the center of the cross-shaped supporting rib. The fixing part is in the shape of a circular ring. A plurality of threading holes evenly arranged along the circumference are arranged on the fixing part. The elastic grille net is arranged at the air outlet, and the elastic grille net is in the shape of a plane. The elastic grille net includes elastic warp and elastic weft. The elastic warp and elastic weft are both made of elastic materials, such as thermoplastic polyurethane, composite nylon, carbon fiber reinforced polymer, etc. One end of the elastic warp is fixedly connected to the edge of the air outlet, and the other end is fixedly connected to the adjusting part after passing through the threading hole on the fixing part, and the adjusting part is arranged at the fixing part. Multiple elastic warps are evenly arranged along the circumference, and the fixing part and the adjusting part are both arranged at the center of the circumference. The elastic weft is in the shape of a ring line, and the elastic weft is fixedly connected to multiple elastic warps. In this embodiment, the elastic weft is in the shape of a circular ring. The plurality of elastic wefts are circles with different diameters, the plurality of elastic wefts are concentrically arranged, and the fixing member and the adjusting member are both arranged at the center of the circle. The driving member is an electric push rod. The electric push rod can drive the adjusting member to move along the axial direction of the elastic grid net so that the adjusting member is away from the elastic grid net or close to the elastic grid net. When the adjusting member moves in a direction away from the elastic grid net, the elastic warp is stretched, a part of the elastic weft close to the adjusting member is gathered near the adjusting member, and the spacing of a part of the elastic weft away from the adjusting member becomes larger. When the adjusting member moves in a direction close to the elastic grid net, the elastic warp contracts, the elastic weft gathered near the adjusting member is unfolded, and the spacing of the elastic weft becomes smaller. The elastic warp is passed through the threading through hole on the fixing member, which can keep the elastic grid net in a planar state. Specifically, only the elastic warp between the fixing member and the adjusting member is stretched and bent, while the elastic warp and elastic weft between the fixing member and the edge of the air outlet are maintained on the same plane.

[0047] The wind pressure detection member is used to detect the wind pressure at the air outlet, and the wind pressure detection member can specifically adopt a wind pressure sensor. The interference detection member 4 is used to detect whether there is an interference at the air outlet, and detect whether the interference is entering the air outlet. In this embodiment, the interference detection member 4 can adopt an infrared sensor to detect whether there is an interference at the air outlet, and judge whether the interference is entering the air outlet by the texture on the interference.

[0048] The air conditioning system further includes a control module, and the fan 1, the grille 2, the wind pressure detection element, and the interference detection element 4 are all electrically connected to the control module. The control module is configured to execute the control method of the air conditioning system. The control module can be configured only to execute the control method and not to execute other operation controls of the air conditioning system. Other operation controls can be equipped with other control modules; it can also be configured to execute other operation controls of the air conditioning system in addition to executing the control method, that is, the control module is a comprehensive execution module, that is, it executes various programs in the operation of the air conditioning system.

[0049] The control method of the air conditioning system is described below through five embodiments.

[0050] Embodiment 1

[0051] The control method of this embodiment includes the following steps:

[0052] The rotation speed of the fan 1 is determined according to the heat exchange performance of the air conditioning system.

[0053] Further, when the air-conditioning system is cooling, the heat exchange performance is set to the supercooling degree of the air-conditioning system; when the air-conditioning system is heating, the heat exchange performance is set to the superheating degree of the air-conditioning system.

[0054] Further, when the heat exchange performance of the air conditioning system is greater than the upper limit of the first preset range, the speed of the fan 1 is reduced; when the heat exchange performance of the air conditioning system is less than the lower limit of the first preset range, the speed of the fan 1 is increased; when the heat exchange performance of the air conditioning system is within the first preset range, the current speed of the fan 1 is maintained. Further, the first preset range is set according to the heat exchange performance target value and the heat exchange performance preset error. For example, in cooling, the upper limit of the first preset range is the subcooling target value plus the subcooling preset error, and the lower limit is the subcooling target value minus the subcooling preset error; in heating, the upper limit of the first preset range is the superheat target value plus the superheat preset error, and the lower limit is the superheat target value minus the superheat preset error.

[0055] Reference Figure 4 The specific process of the control method of this embodiment includes the following steps:

[0056] S101: Determine whether the air conditioning system is in cooling mode. If the air conditioning system is in cooling mode, execute S102; if the air conditioning system is not in cooling mode, it means that the air conditioning system is in heating mode, execute S107.

[0057] S102: According to the supercooling target value and the supercooling preset error, a first preset range is set. Then S103 is executed.

[0058] S103: Determine whether the degree of supercooling of the air conditioning system is greater than the upper limit of the first preset range. If the degree of supercooling is greater than the upper limit, execute S104; if the degree of supercooling is not greater than the upper limit, execute S105.

[0059] S104: Reduce the rotation speed of the fan 1. Specifically, reduce the rotation speed of the fan 1 by 1%. Then, execute S101 again.

[0060] S105: Determine whether the supercooling degree of the air conditioning system is less than the lower limit of the first preset range. If the supercooling degree is less than the lower limit, execute S106; if the supercooling degree is not greater than the upper limit, execute S101 again.

[0061] S106: Increase the rotation speed of the fan 1. Specifically, increase the rotation speed of the fan 1 by 1%. Then, execute S101 again.

[0062] S107: Determine a first preset range according to the superheat target value and the superheat preset error. Then execute S108.

[0063] S108: Determine whether the superheat of the air conditioning system is greater than the upper limit of the first preset range. If the superheat is greater than the upper limit, execute S104; if the superheat is not greater than the upper limit, execute S109.

[0064] S109: Determine whether the superheat of the air conditioning system is less than the lower limit of the first preset range. If the superheat is less than the lower limit, execute S106; if the superheat is not greater than the upper limit, execute S101 again.

[0065] What needs to be explained about this control method is that, although the adjustment range is 1% each time the speed is increased or decreased in this embodiment, this setting is not a limitation of the present invention. Without departing from the principles of the present invention, technical personnel in this field may also adopt other settings in other embodiments, which do not deviate from the basic principles of the present invention and therefore fall within the scope of protection of the present invention.

[0066] Embodiment 2

[0067] The control method of this embodiment includes the following steps:

[0068] The gap size of the grille 2 is determined according to the wind pressure at the air outlet.

[0069] Further, when the wind pressure is greater than the upper limit of the second preset range, the gap of the grille 2 is increased to reduce the wind resistance at the grille 2; when the wind pressure is less than the lower limit of the second preset range, the gap of the grille 2 is reduced so that the grille 2 has a better effect of blocking interference. Further, the second preset range is set according to the wind pressure target value and the wind pressure preset error. Specifically, the upper limit of the second preset range is the wind pressure target value plus the wind pressure preset error, and the lower limit is the wind pressure target value minus the wind pressure preset error.

[0070] Reference Figure 5 The specific process of the control method of this embodiment includes the following steps:

[0071] S201: The wind pressure detection component detects the wind pressure at the air outlet, and then executes S202.

[0072] S202: Determine whether the wind pressure is greater than the upper limit of the second preset range. If the wind pressure is greater than the upper limit, execute S203; if the wind pressure is not greater than the upper limit, execute S204.

[0073] S203: Increase the gap of the grille 2. Specifically, increase the gap of the grille 2 by 1%. Then, execute S201 again.

[0074] S204: Determine whether the wind pressure is less than the lower limit of the second preset range. If the wind pressure is less than the lower limit, execute S205; if the wind pressure is not less than the lower limit, execute S201 again.

[0075] S205: Reduce the gap of the grille 2. Specifically, reduce the gap of the grille 2 by 1%. Then, execute S201 again.

[0076] What needs to be explained about the present control method is that, although in the present embodiment, the amplitude of adjusting the gap of the grille 2 each time is 1%, this setting is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art may also adopt other settings in other embodiments, which do not depart from the basic principle of the present invention and therefore fall within the protection scope of the present invention.

[0077] Embodiment 3

[0078] The difference between this embodiment and the second embodiment is that this embodiment adjusts the gap of the grille 2 according to the wind pressure at the air outlet only when the heat exchange performance of the air conditioning system is within the first preset range. In other words, when the speed of the fan 1 does not need to be adjusted, the gap of the grille 2 is adjusted according to the wind pressure.

[0079] Reference Figure 6 The specific process of the control method of this embodiment includes the following steps:

[0080] S301: Determine whether the air conditioning system is in cooling mode. If the air conditioning system is in cooling mode, execute S302; if the air conditioning system is not in cooling mode, it means that the air conditioning system is in heating mode, execute S304.

[0081] S302: Determine a first preset range according to the supercooling target value and the supercooling preset error. Then execute S303.

[0082] S303: Determine whether the supercooling degree of the air conditioning system is within a first preset range. If the supercooling degree is within the first preset range, execute S306.

[0083] S304: Determine a first preset range according to the superheat target value and the superheat preset error. Then execute S305.

[0084] S305: Determine whether the superheat of the air conditioning system is within a first preset range. If the superheat is within the first preset range, execute S306.

[0085] S306: The wind pressure detection component detects the wind pressure at the wind outlet, and then executes S307.

[0086] S307: Determine whether the wind pressure is greater than the upper limit of the second preset range. If the wind pressure is greater than the upper limit, execute S308; if the wind pressure is not greater than the upper limit, execute S309.

[0087] S308: Increase the gap of the grille 2. Specifically, increase the gap of the grille 2 by 1%. Then, execute S301 again.

[0088] S309: Determine whether the wind pressure is less than the lower limit of the second preset range. If the wind pressure is less than the lower limit, execute S310; if the wind pressure is not less than the lower limit, execute S301 again.

[0089] S310: Reduce the gap of the grille 2. Specifically, reduce the gap of the grille 2 by 1%. Then, execute S301 again.

[0090] Embodiment 4

[0091] The control method of this embodiment includes the following steps:

[0092] The gap size of the grille 2 is determined according to whether there is an interfering object at the air outlet.

[0093] Specifically, when there is an interference at the air outlet, the gap of the grille 2 is reduced to prevent the interference from entering the air outlet. Further, the reduction of the gap of the grille 2 in this embodiment is greater than the adjustment range in embodiments 1 to 3, so that the grille 2 can effectively block the interference.

[0094] Furthermore, when there is an interfering object at the air outlet, the gap of the grille 2 is narrowed. After the gap of the grille 2 is narrowed, it is detected again whether the interfering object is continuing to extend into the air outlet. If it is continuing to extend, the gap of the grille 2 is narrowed again. The above steps are performed multiple times until the interfering object no longer continues to extend into the air outlet. This setting method can effectively prevent interfering objects from entering the air outlet.

[0095] Reference Figure 7 The specific process of the control method of this embodiment includes the following steps:

[0096] S401: The interference object detection component 4 detects whether there is an interference object at the air outlet. If there is no interference object, S401 is executed again, and if there is an interference object, S402 is executed.

[0097] S402: The air conditioning system sounds an alarm and stops running. Specifically, the fan 1 stops rotating. Then S403 is executed.

[0098] S403: Reduce the gap of the grille 2. Specifically, reduce the gap of the grille 2 by 10%. Then execute S404.

[0099] S404: The interference object detection member 4 detects whether the interference object continues to extend into the air vent. If the interference object does not continue to extend into the air vent, S405 is executed; if the interference object continues to extend into the air vent, S403 is executed again.

[0100] S405: The air conditioning system enters standby mode, waiting for maintenance.

[0101] What needs to be explained about the present control method is that, although the amplitude of reducing the gap of the grille 2 is 10% in the present embodiment, this setting is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art may also adopt other settings in other embodiments, which do not depart from the basic principle of the present invention and therefore fall within the protection scope of the present invention.

[0102] Embodiment 5

[0103] Reference Figure 8 In this embodiment, in combination with the above four embodiments, the specific process of the control method includes the following steps:

[0104] S501: The interference object detection component 4 detects whether there is an interference object at the air outlet. If there is an interference object, S502 is executed, and if there is no interference object, S506 is executed.

[0105] S502: The air conditioning system sounds an alarm and stops running, and then executes S503.

[0106] S503: Reduce the gap of the grille 2, and then execute S504.

[0107] S504: The interference object detection member 4 detects whether the interference object continues to extend into the air vent. If the interference object does not continue to extend into the air vent, S505 is executed; if the interference object continues to extend into the air vent, S503 is executed again.

[0108] S505: The air conditioning system enters standby mode, waiting for maintenance.

[0109] S506: Determine whether the air conditioning system is in cooling mode. If the air conditioning system is in cooling mode, execute S507; if the air conditioning system is not in cooling mode, it means that the air conditioning system is in heating mode, execute S512.

[0110] S507: Determine a first preset range according to the supercooling target value and the supercooling preset error. Then execute S508.

[0111] S508: Determine whether the degree of supercooling of the air conditioning system is greater than the upper limit of the first preset range. If the degree of supercooling is greater than the upper limit, execute S509; if the degree of supercooling is not greater than the upper limit, execute S510.

[0112] S509: Reduce the rotation speed of fan 1, and then execute S501 again.

[0113] S510: Determine whether the supercooling degree of the air conditioning system is less than the lower limit of the first preset range. If the supercooling degree is less than the lower limit, execute S511; if the supercooling degree is not greater than the upper limit, execute S515.

[0114] S511: Increase the rotation speed of fan 1, and then execute S501 again.

[0115] S512: Determine a first preset range according to the superheat target value and the superheat preset error. Then execute S513.

[0116] S513: Determine whether the superheat of the air conditioning system is greater than the upper limit of the first preset range. If the superheat is greater than the upper limit, execute S509; if the superheat is not greater than the upper limit, execute S514.

[0117] S514: Determine whether the superheat of the air conditioning system is less than the lower limit of the first preset range. If the superheat is less than the lower limit, execute S511, and if the superheat is not greater than the upper limit, execute S515 again.

[0118] S515: The wind pressure detection component detects the wind pressure at the air outlet, and then executes S516.

[0119] S516: Determine whether the wind pressure is greater than the upper limit of the second preset range. If the wind pressure is greater than the upper limit, execute S517; if the wind pressure is not greater than the upper limit, execute S518.

[0120] S517: Increase the gap of the grille 2, and then execute S501 again.

[0121] S518: Determine whether the wind pressure is less than the lower limit of the second preset range. If the wind pressure is less than the lower limit, execute S519; if the wind pressure is not less than the lower limit, execute S501 again.

[0122] S519: Reduce the gap of the grille 2, and then execute S501 again.

[0123] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A control method for an air conditioning system, the air conditioning system comprising an outdoor unit, the outdoor unit comprising a grille (2), the gap size of the grille (2) being adjustable, the grille (2) being arranged at the air outlet of the outdoor unit, characterized in that: The control method comprises the following steps: The size of the gap of the grille (2) is determined according to whether there is an interfering object at the air outlet.

2. The control method according to claim 1, characterized in that: "Determining the gap size of the grille (2) according to whether there is an interfering object at the air outlet" comprises the following steps: If there is an interfering object at the air outlet, the gap of the grille (2) is reduced.

3. The control method according to claim 2, characterized in that: "Determining the gap size of the grille (2) according to whether there is an interfering object at the air outlet" also includes the following steps: After the gap of the grille (2) is reduced, the size of the gap of the grille (2) is determined again based on whether the interference object continues to extend into the air outlet.

4. The control method according to claim 3, characterized in that: "Determining the gap size of the grille (2) according to whether the interference object continues to extend into the air outlet" comprises the following steps: If the interfering object continues to extend into the interior of the air outlet, the gap of the grille (2) is reduced again.

5. The control method according to claim 1, characterized in that: The outdoor unit further comprises a fan (1), and the control method further comprises the following steps: The rotation speed of the fan (1) is determined according to the heat exchange performance of the air conditioning system.

6. The control method according to claim 5, characterized in that: “Determining the rotation speed of the fan (1) according to the heat exchange performance of the air conditioner” comprises the following steps: If the heat exchange performance of the air conditioning system is greater than an upper limit of a first preset range, reducing the rotation speed of the fan (1); If the heat exchange performance of the air conditioning system is less than the lower limit of the first preset range, the rotation speed of the fan (1) is increased.

7. The control method according to claim 5, characterized in that: "Determining the gap size of the grille (2) according to whether there is an interfering object at the air outlet" comprises the following steps: When there is no interference at the air outlet and the heat exchange performance of the air conditioning system is within a first preset range, the gap size of the grille (2) is determined according to the wind pressure at the air outlet.

8. The control method according to claim 7, characterized in that: “Determining the gap size of the grille (2) according to the wind pressure at the air outlet” comprises the following steps: If the wind pressure is greater than an upper limit of a second preset range, increasing the gap of the grille (2); If the wind pressure is less than the lower limit of the second preset range, the gap of the grille (2) is reduced.

9. The control method according to claim 1, characterized in that: The amplitude of adjusting the gap of the grille (2) according to whether there is an interfering object at the air outlet is greater than the amplitude of adjusting the gap of the grille (2) according to the wind pressure at the air outlet.

10. An air conditioning system, characterized in that: The method comprises a control module configured to execute the control method according to any one of claims 1 to 9.

Images