Air conditioning system and control method thereof

Abstract

The present application provides an air-conditioning system and a control method thereof, which relate to the technical field of air-conditioning. The air-conditioning system includes: an indoor unit; an outdoor unit; a built-in DC fan driver, including a drive module and a fan, the drive module being used to receive a PWM signal and output a Vsp voltage to the fan according to the duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears, wherein different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles; a controller being configured to: in response to an instruction indicating entering a fan debugging mode, sequentially send a plurality of PWM signals to the built-in DC fan driver and obtain a fan speed corresponding to each PWM signal; obtain control parameters for driving the built-in DC fan according to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the control parameters including a startup duty cycle and a plurality of gear duty cycles.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] Air conditioners are a common household appliance, providing numerous conveniences for users. Both the indoor and outdoor units of an air conditioner are equipped with fans. The indoor fan blows the heat and cool air generated by the air conditioner into the room, while the outdoor fan assists the outdoor heat exchanger in dissipating heat. While there are many different types of fans, built-in DC fans offer simple control methods and reliable performance, making them widely used in both indoor and outdoor air conditioner units.

[0003] However, the related art uses Vsp to control the speed of internally driven DC fans. However, the characteristics of internally driven DC fans vary from manufacturer to manufacturer and from different types. In actual use, controlling the internally driven fan with its set control parameters may result in a mismatch between the internally driven fan and the air conditioning system, affecting the air conditioner's operating efficiency or even damaging the system. Summary of the Invention

[0004] An embodiment of the present application provides an air-conditioning system and a control method thereof, which are used to automatically match a driven built-in DC fan with different characteristics so that the driven built-in DC fan can operate normally.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an air conditioning system, comprising:

[0007] A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence;

[0008] Indoor unit, including indoor heat exchanger;

[0009] outdoor unit, including the compressor and outdoor heat exchanger;

[0010] A built-in DC fan is driven and provided in the outdoor unit and / or the indoor unit, and includes a drive module and a fan. The drive module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears. Different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles.

[0011] The controller is electrically connected to the built-in DC fan of the driver and is configured as follows:

[0012] In response to an instruction to enter a fan debugging mode, multiple PWM signals are sequentially sent to a built-in DC fan driver, and a fan speed corresponding to each PWM signal is obtained; the multiple PWM signals have different duty cycles;

[0013] According to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the control parameters for driving the built-in DC fan are obtained. The control parameters include the starting duty cycle and multiple gear duty cycles. The Vsp voltage corresponding to the starting duty cycle is the starting voltage for driving the built-in DC fan. The Vsp voltage corresponding to each gear duty cycle in the multiple gear duty cycles corresponds to each speed gear.

[0014] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: after receiving an instruction to enter the fan debugging mode, by sequentially sending multiple PWM signals with different duty cycles to the built-in DC fan, and obtaining the fan speed corresponding to each PWM signal. According to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the duty cycle corresponding to the built-in DC fan when reaching the starting speed and the wind speed corresponding to the multiple gears can be obtained, thereby determining the Vsp voltage corresponding to the built-in DC fan when reaching the starting speed and the wind speed corresponding to the multiple gears according to the Vsp voltage corresponding to the duty cycle. In this way, it is possible to automatically determine the control parameters (including the starting duty cycle and the multiple gear duty cycles) of the connected built-in DC fan in the fan control mode. In this way, for different types of built-in DC fans, the controller of the air conditioner can also automatically determine the control parameters of the built-in DC fans of each type after fan debugging, and then accurately control the various built-in DC fans based on the control parameters matched by the various types of built-in DC fans.

[0015] In some embodiments, the above-mentioned controller executes sending multiple PWM signals to the built-in DC fan in sequence, and obtains the fan speed corresponding to each PWM signal, and is further configured as: for the target fan speed, sending the i-th PWM signal to the built-in DC fan, and obtaining the fan speed corresponding to the i-th PWM signal; the target fan speed corresponds to any one of a plurality of speed gears; i≥1, i is an integer; if the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, then sending the i+1-th PWM signal to the built-in DC fan, and the duty cycle of the i+1-th PWM signal is greater than the duty cycle of the i-th PWM signal.

[0016] It can be seen from the above embodiment that when the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, it means that the duty cycle of the i-th PWM signal is less than the duty cycle corresponding to the Vsp voltage that reaches the target fan speed. In this regard, by sending the i+1-th PWM signal with a duty cycle greater than the duty cycle of the i-th PWM signal to the built-in DC fan, the speed of the built-in DC fan is gradually increased until the fan speed corresponding to the PWM signal reaches the target fan speed, so as to determine the duty cycle that can enable the built-in DC fan to actually reach the target fan speed.

[0017] In some embodiments, if the fan speed corresponding to the i-th PWM signal is less than the target fan speed, and the difference between the target fan speed and the fan speed corresponding to the i-th PWM signal is greater than a first preset value, it is determined that the fan speed corresponding to the i-th PWM signal has not reached the target fan speed.

[0018] Since there may be slight differences in the fan speeds corresponding to PWM signals with the same duty cycle, for example, fan wear and other conditions may cause the fan speeds corresponding to PWM signals with the same duty cycle to be different, only when the fan speed corresponding to the i-th PWM signal is less than the target fan speed and the difference between the target fan speed and the fan speed corresponding to the i-th PWM signal is greater than a first preset value, is a PWM signal with a larger duty cycle triggered to be sent to the fan. In this way, it can be accurately determined that the fan speed corresponding to the i-th PWM signal has not reached the target fan speed, thereby reducing misjudgment.

[0019] In some embodiments, when the fan speed corresponding to the above-mentioned i-th PWM signal is less than the target fan speed, the duty cycle of the i+1-th PWM signal is the sum of the duty cycle of the i-th PWM signal and a preset duty cycle adjustment value; when the fan speed corresponding to the above-mentioned i-th PWM signal is greater than the target fan speed, the duty cycle of the i+1-th PWM signal is the difference between the duty cycle of the i-th PWM signal and the preset duty cycle adjustment value.

[0020] It can be seen from the above embodiment that when the fan speed corresponding to the above-mentioned i-th PWM signal is inconsistent with the target fan speed, the duty cycle of the i+1-th PWM signal is adjusted according to the duty cycle of the i-th PWM signal and the preset duty cycle adjustment value, so that the duty cycle of the i-th PWM signal can be determined more accurately, so that the fan speed can be adjusted more accurately.

[0021] In some embodiments, the above-mentioned controller is further configured to: obtain a preset fan speed in response to a fan start-up instruction, the preset fan speed corresponding to any one of a plurality of speed gears; determine the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan, and obtain the fan speed corresponding to each PWM signal; if the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

[0022] As can be seen from the above embodiment, after receiving the fan start command, the preset fan speed corresponding to any one of the multiple speed gears is obtained, and then one or more PWM signals with different duty cycles are sent to the built-in DC fan, and the fan speed corresponding to each PWM signal is obtained, thereby determining the duty cycle of the PWM signal that reaches the preset fan speed. When the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameters is greater than a second preset value, it indicates that the duty cycle of the PWM signal that reaches the preset fan speed is significantly different from the duty cycle of the gear corresponding to the preset fan speed in the control parameters, that is, the fan cannot reach the preset fan speed using the duty cycle of the gear corresponding to the preset fan speed in the control parameters. Therefore, the control parameters of the fan need to be corrected to ensure the normal operation of the fan.

[0023] In some embodiments, the above-mentioned controller executes correction of the control parameters according to the difference, and is further configured to: determine the correction value according to the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter; when the difference is positive, the correction value is half of the difference; when the difference is negative, the correction value is the difference; use the correction value to correct each duty cycle in the control parameter, and the corrected duty cycle is the sum of the duty cycle before correction and the correction value.

[0024] Since the reference voltage connected to the air-conditioning system may have large differences (for example, single-phase AC 220V or three-phase AC 380V), when the connected reference voltage changes significantly, the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameters will be greatly different. In this regard, a correction value can be determined based on the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameters, and the control parameters of the fan can be corrected. Then, based on the corrected fan control parameters, accurate control of the built-in DC fan can be achieved.

[0025] In a second aspect, an embodiment of the present application further provides an air conditioning system, the air conditioning system comprising:

[0026] A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence;

[0027] Indoor unit, including indoor heat exchanger;

[0028] outdoor unit, including the compressor and outdoor heat exchanger;

[0029] A built-in DC fan is driven and provided in the outdoor unit and / or the indoor unit, and includes a drive module and a fan. The drive module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears. Different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles.

[0030] A controller is electrically connected to the built-in DC fan driver. The air conditioning system is preset with control parameters for the built-in DC fan driver. The control parameters include a Vsp starting voltage corresponding to the built-in DC fan driver and Vsp voltages corresponding to various speed gears.

[0031] The controller is configured as:

[0032] In response to a fan start instruction, obtaining a preset fan speed, the preset fan speed corresponding to any one of a plurality of speed gears;

[0033] By sending one or more PWM signals with different duty cycles to the built-in DC fan, and obtaining the fan speed corresponding to each PWM signal, the duty cycle of the PWM signal that reaches the preset fan speed is determined;

[0034] If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

[0035] As can be seen from the above embodiment, after receiving the fan start command, the preset fan speed corresponding to any one of the multiple speed gears is obtained, and then the duty cycle of the PWM signal that reaches the preset fan speed is determined by sending one or more PWM signals with different duty cycles to the built-in DC fan, and obtaining the fan speed corresponding to each PWM signal. When the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameters is greater than a second preset value, it indicates that the duty cycle of the PWM signal that reaches the preset fan speed is significantly different from the duty cycle of the gear corresponding to the preset fan speed in the control parameters, that is, the fan cannot reach the preset fan speed by the duty cycle of the gear corresponding to the preset fan speed in the control parameters. Therefore, the control parameters need to be corrected to ensure the normal operation of the fan.

[0036] In a third aspect, an embodiment of the present application provides a method for controlling an air-conditioning system, the air-conditioning system comprising:

[0037] A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence;

[0038] Indoor unit, including indoor heat exchanger;

[0039] outdoor unit, including the compressor and outdoor heat exchanger;

[0040] A built-in DC fan is driven and provided in the outdoor unit and / or the indoor unit, and includes a drive module and a fan. The drive module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears. Different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles.

[0041] The method includes:

[0042] In response to an instruction to enter a fan debugging mode, multiple PWM signals are sequentially sent to a built-in DC fan driver, and a fan speed corresponding to each PWM signal is obtained; the multiple PWM signals have different duty cycles;

[0043] According to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the control parameters for driving the built-in DC fan are obtained. The control parameters include the starting duty cycle and multiple gear duty cycles. The Vsp voltage corresponding to the starting duty cycle is the starting voltage for driving the built-in DC fan. The Vsp voltage corresponding to each gear duty cycle in the multiple gear duty cycles corresponds to each speed gear.

[0044] In a fourth aspect, an embodiment of the present application further provides a method for controlling an air-conditioning system, the air-conditioning system comprising:

[0045] A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence;

[0046] Indoor unit, including indoor heat exchanger;

[0047] outdoor unit, including the compressor and outdoor heat exchanger;

[0048] A built-in DC fan is driven and provided in the outdoor unit and / or the indoor unit, and includes a drive module and a fan. The drive module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears. Different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles.

[0049] The air conditioning system is pre-set with control parameters for driving the built-in DC fan. The control parameters include the Vsp starting voltage corresponding to driving the built-in DC fan and the Vsp voltage corresponding to each speed gear.

[0050] The method includes:

[0051] In response to a fan start instruction, obtaining a preset fan speed, the preset fan speed corresponding to any one of a plurality of speed gears;

[0052] By sending one or more PWM signals with different duty cycles to the built-in DC fan, and obtaining the fan speed corresponding to each PWM signal, the duty cycle of the PWM signal that reaches the preset fan speed is determined;

[0053] If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

[0054] In the fifth aspect, an embodiment of the present application provides a controller comprising: one or more processors; one or more memories; wherein the one or more memories are used to store computer program codes, the computer program codes comprising computer instructions, and when the one or more processors execute the computer instructions, the controller executes the control methods provided in the third and fourth aspects.

[0055] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, which includes computer instructions. When the computer instructions are controlled on a computer, the computer executes the methods provided in the third aspect, the fourth aspect, and possible implementation methods.

[0056] In the seventh aspect, an embodiment of the present invention provides a computer program product, which can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the methods provided in the third aspect, the fourth aspect and possible implementation methods.

[0057] It should be noted that the above-mentioned computer instructions may be stored in whole or in part on a computer-readable storage medium. The computer-readable storage medium may be packaged together with the processor of the controller or separately from the processor of the controller, and this application does not limit this.

[0058] The beneficial effects described in the third to seventh aspects of this application can be referred to the analysis of the beneficial effects of the first and second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0060] Figure 1 A schematic structural diagram of an air conditioning system provided in an embodiment of the present application;

[0061] Figure 2 A schematic diagram of the appearance of an air-conditioning outdoor unit provided in an embodiment of the present application;

[0062] Figure 3 A schematic structural diagram of an air-conditioning outdoor unit provided in an embodiment of the present application;

[0063] Figure 4 A schematic diagram of a circuit architecture of a controller provided in an embodiment of the present application;

[0064] Figure 5 A control method process of an air conditioning system provided in an embodiment of the present application Figure 1 ;

[0065] Figure 6 A control method process of an air conditioning system provided in an embodiment of the present application Figure 2 ;

[0066] Figure 7 A flow chart of a method for controlling an air-conditioning system provided in an embodiment of the present application;

[0067] Figure 8 A flow chart of another method for controlling an air-conditioning system provided in an embodiment of the present application;

[0068] Figure 9A flow chart of another method for controlling an air-conditioning system provided in an embodiment of the present application;

[0069] Figure 10 A schematic diagram of the hardware structure of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0071] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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 cannot be understood as limiting the present invention.

[0072] 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 number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0073] The term "and / or" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0074] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, when describing pipelines, the terms "connected" and "connected" used in this application have the meaning of conducting. The specific meaning needs to be understood in the context.

[0075] The terms "including," "having," and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or apparatus.

[0076] Furthermore, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0077] To facilitate understanding, we first briefly introduce and explain the basic concepts of some terms or technologies involved in the embodiments of this application.

[0078] Vsp voltage: command voltage.

[0079] Vcc voltage: circuit supply voltage (Volt Current Condenser, Vcc), also known as the reference voltage.

[0080] PWM: Pulse Width Modulation (PWM).

[0081] EPROM: Erasable Programmable ROM (EPROM).

[0082] Rpm0: Preset fan speed.

[0083] Rpm[i]: Target fan speed for the i-th speed gear.

[0084] Rpm: The fan speed corresponding to the current i-th speed gear.

[0085] Duty: The duty cycle of the PWM signal.

[0086] Duty0: The duty cycle of the PWM signal corresponding to the fan speed is preset in the EPROM.

[0087] Duty1: The duty cycle of the PWM signal that actually reaches the preset fan speed.

[0088] Duty[i]: The duty cycle of the PWM signal of the target fan speed at the i-th speed gear in the EPROM.

[0089] DutyMin: The minimum duty cycle limit value of fan control, that is, the duty cycle of the PWM signal corresponding to starting the fan.

[0090] DutyMax: The maximum duty cycle limit value of fan control, generally set to 100%.

[0091] Dutybase: During debugging, preset duty cycle adjustment value.

[0092] The above is an introduction to some of the concepts involved in the embodiments of this application, which will not be repeated below.

[0093] As described in the background, conventional DC fan drivers all use Vsp to control their speed. However, the characteristics of DC fan drivers vary from manufacturer to manufacturer and from different types. In actual use, controlling the fan with its set control parameters may result in a mismatch between the fan and the air conditioning system, impacting the air conditioner's operating efficiency or even damaging the system.

[0094] In view of this, an embodiment of the present application provides an air conditioning system and a control method thereof. After receiving an instruction to enter a fan debugging mode, the system sequentially sends multiple PWM signals with different duty cycles to a built-in DC fan driver, and obtains the fan speed corresponding to each PWM signal. Based on the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the corresponding duty cycle of the built-in DC fan driver when reaching the starting speed and the wind speed corresponding to multiple gears can be obtained. Based on the Vsp voltage corresponding to the duty cycle, the corresponding Vsp voltage of the built-in DC fan driver when reaching the starting speed and the wind speed corresponding to multiple gears can be determined. After receiving a fan start instruction, a preset fan speed corresponding to any one of the multiple speed gears is obtained. Then, by sending one or more PWM signals with different duty cycles to the built-in DC fan driver, and obtaining the fan speed corresponding to each PWM signal, the duty cycle of the PWM signal that reaches the preset fan speed is determined. When the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the fan control parameters is large, the fan control parameters are corrected.

[0095] Among them, the air-conditioning system provided in the embodiment of the present application can be a cabinet air conditioner, a wall-mounted air conditioner, a water air conditioner, a window air conditioner, a central air conditioner and a multi-split air conditioner, and the embodiment of the present application does not impose any restrictions on this.

[0096] To further describe the technical solutions of the embodiments of the present application, Figure 1 Shown is a structural diagram of an air-conditioning system provided in an embodiment of the present application.

[0097] Reference Figure 1 The air conditioning system 1 includes an indoor unit 10, an outdoor unit 20, connecting pipes 30 and a controller 40 (the controller 40 is not shown in the figure).

[0098] In some embodiments, the indoor unit 10 can be an indoor wall mounted unit or an indoor cabinet unit. Figure 1 As shown in ), the indoor hanging machine is usually installed on the indoor wall.

[0099] In some embodiments, the indoor unit 10 includes: an indoor heat exchanger 101 and an indoor driven built-in DC fan 102.

[0100] The indoor heat exchanger 101 is used to exchange heat with the indoor air, thereby cooling or heating the indoor air.

[0101] The indoor drive has a built-in DC fan 102 for blowing the cold / heat generated by the air conditioner into the room.

[0102] In some embodiments, the outdoor unit 20 is usually set outdoors to assist in heat exchange in the indoor environment. Figure 1 In the figure, since the outdoor unit 20 is located outdoors on the opposite side to the indoor unit 10 across a wall, the outdoor unit 20 is indicated by a dotted line.

[0103] In some embodiments, the outdoor unit 20 includes a compressor 201, a gas-liquid separator 202, an outdoor heat exchanger 203, an outdoor driven built-in DC fan 204, a throttling device 205, and a four-way reversing valve 206. For example, the appearance of the outdoor unit 20 can also be as follows Figure 2 shown.

[0104] In some embodiments, as Figure 3 As shown, the outdoor driven built-in DC fan 204 is provided in the outdoor unit 20 to assist the outdoor heat exchanger 203 in heat exchange.

[0105] In some embodiments, the outdoor driven built-in DC fan 204 includes a drive module and a fan. In the embodiment of the present application, the indoor driven built-in DC fan 102 and the outdoor driven built-in DC fan 204 can have the same structure, and the structure of the indoor driven built-in DC fan 102 will not be repeated.

[0106] In some embodiments, the driving module is used to receive a PWM signal and output a Vsp voltage to the fan according to the duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears. Different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles.

[0107] Exemplarily, when the driving module receives a PWM signal for starting the fan, it outputs a Vsp starting voltage corresponding to the duty cycle of the PWM signal for starting the fan to the fan according to the duty cycle of the PWM signal for starting the fan, so as to drive the fan to operate at a preset starting speed.

[0108] In some embodiments, the fan is driven by the driving module to rotate. When the fan rotates, the gas flow rate near the outdoor heat exchanger 203 is increased to assist the outdoor heat exchanger 203 in heat exchange.

[0109] In some embodiments, the compressor 201 is disposed in the outdoor unit 20 to provide power for the refrigerant circulation.

[0110] In some embodiments, the gas-liquid separator 202 is connected to the air intake of the compressor 201 to accommodate the refrigerant in the refrigerant channel to prevent liquid hammer on the compressor 201 .

[0111] In some embodiments, the outdoor heat exchanger 203 is connected to the exhaust port of the compressor 201 through a four-way reversing valve 206 to enable heat exchange between the refrigerant flowing in the heat transfer pipe of the outdoor heat exchanger 203 and the outdoor air.

[0112] In some embodiments, throttling device 205 is disposed between outdoor heat exchanger 203 and indoor heat exchanger 101. It expands the refrigerant flowing through throttling device 205 to reduce pressure, thereby regulating the refrigerant flow rate in the refrigerant passage. Optionally, throttling device 205 may be an electronic expansion valve.

[0113] In some embodiments, the connecting pipe 30 is provided between the indoor unit 10 and the outdoor unit 20 for connecting the indoor unit 10 and the outdoor unit 20 to form a refrigerant circulation loop for circulating the refrigerant.

[0114] In some embodiments, as Figure 4 As shown, the controller 40 is electrically connected to the indoor heat exchanger 101, the indoor driven built-in DC fan 102, the compressor 201, the gas-liquid separator 202, the outdoor heat exchanger 203, the outdoor driven built-in DC fan 204, the throttling device 205, and the four-way reversing valve 206. The controller 40 is configured to generate an operation control signal based on the instruction operation code and the timing signal, instructing the air conditioning system 1 to execute the control instruction. For example, in response to an instruction to enter the fan debugging mode, the controller 40 can sequentially send multiple PWM signals to the outdoor driven built-in DC fan 204 and obtain the fan speed corresponding to each PWM signal. The controller 40 can also obtain the control parameters of the outdoor driven built-in DC fan 204 based on the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal.

[0115] Exemplarily, the controller 40 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 40 may also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0116] In some embodiments, the controller 40 may be a microcontroller unit (MCU). An MCU, also known as a single-chip microcomputer, is a CPU with reduced frequency and specifications. It integrates memory, timers, USB, A / D converters, UARTs, PLCs, DMA, and other peripheral interfaces, as well as LCD driver circuits, onto a single chip, forming a chip-level computer capable of providing various control combinations for different applications.

[0117] In addition, the controller 40 can be used to control the operation of various components in the air-conditioning system 1 so that the various components of the air-conditioning system 1 operate to achieve various predetermined functions of the air-conditioning system 1 .

[0118] It should be understood that the illustrated structures of the embodiments of the present invention do not constitute a specific limitation on the air conditioning system. In other embodiments of the present application, the air conditioning system may include more or fewer components than shown, or may combine or separate certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0119] The following is a detailed description of the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the control method of the air-conditioning system provided in the embodiments of the present application can include controlling both the indoor driven built-in DC fan and the outdoor driven built-in DC fan.

[0120] like Figure 5 As shown, an embodiment of the present application provides a control method for an air-conditioning system, which is applied to a controller of the air-conditioning system. The method includes the following steps:

[0121] S11 , in response to an instruction to enter a fan debugging mode, sending a plurality of PWM signals 5 in sequence to drive a built-in DC fan, and obtaining a fan speed corresponding to each PWM signal.

[0122] The duty cycles corresponding to the above-mentioned multiple PWM signals are different. The magnitude of the duty cycle determines the output magnitude of the Vsp voltage. The larger the value of the duty cycle, the higher the Vsp voltage.

[0123] Optionally, the fan speed corresponding to each PWM signal is detected by a fan speed detection circuit.

[0124] In some embodiments, S1 may include the following steps S11-S12: 0S111. For the target fan speed, send the i-th PWM signal to the driver of the built-in DC fan, and obtain the fan speed corresponding to the i-th PWM signal.

[0125] The target fan speed corresponds to any one of a plurality of speed gears; i≥1, where i is an integer.

[0126] S112: If the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, the 5-way drive sends the i+1-th PWM signal to the built-in DC fan.

[0127] The duty cycle of the (i+1)th PWM signal is greater than the duty cycle of the i-th PWM signal.

[0128] Exemplarily, the difference between the duty cycle of the (i+1)th PWM signal and the duty cycle of the i-th PWM signal is Dutybase.

[0129] In some embodiments, if the fan speed corresponding to the i-th PWM signal is less than the target fan speed, and the difference between the target fan speed and the fan speed corresponding to the i-th PWM signal is greater than a first preset value, it is determined that the fan speed corresponding to the i-th PWM signal has not reached the target fan speed.

[0130] Among them, the first preset value is the threshold value of the difference between the duty cycle of the PWM signal that actually reaches the preset fan speed and the duty cycle of the PWM signal corresponding to the preset fan speed in the EPROM. The first preset value can be pre-set by the manufacturer of the air-conditioning system.

[0131] As can be seen from the above embodiment, when the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, it means that the duty cycle of the i-th PWM signal is less than the duty cycle corresponding to the Vsp voltage that reaches the target fan speed. In this case, the i+1-th PWM signal with a duty cycle greater than the duty cycle of the i-th PWM signal is sent to the built-in DC fan to drive the built-in DC fan, so that the speed of the built-in DC fan is increased.

[0132] Gradually increase until the fan speed corresponding to the PWM signal reaches the target fan speed, so as to determine the duty cycle that can drive the built-in DC fan to actually reach the target fan speed.

[0133] In some embodiments, the fan speed corresponding to the i-th PWM signal does not reach the target fan speed includes the fan speed corresponding to the i-th PWM signal being less than the target fan speed and the fan speed corresponding to the i-th PWM signal being greater than the target fan speed.

[0134] Since there may be slight differences in the fan speeds corresponding to PWM signals with the same duty cycle, for example, fan wear and other conditions may cause the fan speeds corresponding to PWM signals with the same duty cycle to be different, only when the fan speed corresponding to the i-th PWM signal is less than the target fan speed and the difference between the target fan speed and the fan speed corresponding to the i-th PWM signal is greater than a first preset value, is a PWM signal with a larger duty cycle triggered to be sent to the fan. In this way, it can be accurately determined that the fan speed corresponding to the i-th PWM signal has not reached the target fan speed, thereby reducing misjudgment.

[0135] Optionally, when the fan speed corresponding to the i-th PWM signal is less than the target fan speed, the duty cycle of the (i+1)-th PWM signal is the sum of the duty cycle of the i-th PWM signal and a preset duty cycle adjustment value. That is, when Rpm[i] < Rpm, Duty = Duty + Dutybase.

[0136] Optionally, when the fan speed corresponding to the i-th PWM signal is greater than the target fan speed, the duty cycle of the (i+1)-th PWM signal is the difference between the duty cycle of the i-th PWM signal and a preset duty cycle adjustment value. That is, when Rpm[i]>Rpm, Duty=Duty-Dutybase.

[0137] It can be seen from the above embodiment that when the fan speed corresponding to the above-mentioned i-th PWM signal is inconsistent with the target fan speed, the duty cycle of the i+1-th PWM signal is adjusted according to the duty cycle of the i-th PWM signal and the preset duty cycle adjustment value, so that the duty cycle of the i-th PWM signal can be determined more accurately, so that the fan speed can be adjusted more accurately.

[0138] S12. Obtain control parameters for driving the built-in DC fan according to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal.

[0139] Among them, the control parameters include a starting duty cycle and multiple gear duty cycles. The Vsp voltage corresponding to the starting duty cycle is the starting voltage for driving the built-in DC fan. The Vsp voltage corresponding to each gear duty cycle in the multiple gear duty cycles corresponds to each speed gear.

[0140] Figure 5The illustrated embodiment provides at least the following beneficial effects: after receiving an instruction to enter fan commissioning mode, multiple PWM signals with different duty cycles are sequentially sent to the built-in DC fan, and the fan speed corresponding to each PWM signal is obtained. Based on the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, the duty cycle corresponding to the built-in DC fan when the fan reaches the starting speed and the wind speed corresponding to the multiple gears can be obtained. Thus, based on the Vsp voltage corresponding to the duty cycle, the Vsp voltage corresponding to the built-in DC fan when the fan reaches the starting speed and the wind speed corresponding to the multiple gears can be determined. In this way, the control parameters (including the starting duty cycle and the multiple gear duty cycles) of the connected built-in DC fan can be automatically determined in the fan control mode. Thus, for different types of built-in DC fans, the air conditioner controller can also automatically determine the control parameters of each type of built-in DC fan after fan commissioning, thereby accurately controlling each type of built-in DC fan based on the control parameters matched to each type of built-in DC fan.

[0141] In some embodiments, the control method of an air conditioning system provided by the embodiments of the present application further includes the following steps:

[0142] S13. In response to the fan start instruction, obtain a preset fan speed.

[0143] The preset fan speed corresponds to any one of a plurality of speed gears.

[0144] S14, determining the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal.

[0145] For example, the preset speed gear is used as the speed gear for starting the fan, and the speed gear for starting the fan is obtained as 50r / min. By sending one or more PWM signals with different duty cycles to drive the built-in DC fan, and obtaining the fan speed corresponding to each PWM signal, it is determined that the speed gear for starting the fan is reached and the Duty value at 50r / min is obtained as the starting Duty, that is, Dutymine.

[0146] As a possible implementation method, step S14 may include the following steps S141-:

[0147] S141. Send an nth PWM signal to a built-in DC fan driver, and obtain a fan speed corresponding to the nth PWM signal.

[0148] S142: If the fan speed corresponding to the nth PWM signal does not reach the preset fan speed, send the n+1th PWM signal to the driver of the built-in DC fan.

[0149] The duty cycle of the (n+1)th PWM signal is greater than the duty cycle of the nth PWM signal.

[0150] S15. If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

[0151] The second preset value is a threshold value of the difference between the fan speed corresponding to the current i-th gear and the target fan speed for the i-th gear. The second preset value may be pre-set by the manufacturer of the air-conditioning system.

[0152] As can be seen from the above embodiment, after receiving the fan start command, the preset fan speed corresponding to any one of the multiple speed gears is obtained, and then one or more PWM signals with different duty cycles are sent to the built-in DC fan, and the fan speed corresponding to each PWM signal is obtained, thereby determining the duty cycle of the PWM signal that reaches the preset fan speed. When the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameters is greater than a second preset value, it indicates that the duty cycle of the PWM signal that reaches the preset fan speed is significantly different from the duty cycle of the gear corresponding to the preset fan speed in the control parameters, that is, the fan cannot reach the preset fan speed using the duty cycle of the gear corresponding to the preset fan speed in the control parameters. Therefore, the control parameters of the fan need to be corrected to ensure the normal operation of the fan.

[0153] In some embodiments, step S15 may include the following steps S151 and S152.

[0154] S151. Determine a correction value based on the difference. When the difference is positive, the correction value is half of the difference; when the difference is negative, the correction value is the difference.

[0155] S152: Correct each duty cycle in the control parameter using the correction value, where the corrected duty cycle is the sum of the duty cycle before correction and the correction value.

[0156] Exemplarily, when Duty1>Duty0, dk=(Duty1-Duty0) / 2; when Duty1<Duty0, dk=(Duty1-Duty0), where dk is a correction value.

[0157] In some embodiments, the duty cycle of the PWM signal of the corrected target fan speed is updated into the EPROM according to the fan speed corresponding to gear i, that is, Duty[i]=Duty[i]+dk.

[0158] Since the reference voltage connected to the air-conditioning system may have large differences (for example, single-phase AC 220V or three-phase AC 380V), when the connected reference voltage changes significantly, the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameters will be greatly different. In this regard, a correction value can be determined based on the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameters, and the control parameters of the fan can be corrected. Then, based on the corrected fan control parameters, accurate control of the built-in DC fan can be achieved.

[0159] like Figure 6 As shown, an embodiment of the present application further provides a control method for an air conditioning system, which is applied to a controller of the air conditioning system. The air conditioning system has preset control parameters for driving a built-in DC fan, the control parameters including a Vsp starting voltage corresponding to driving the built-in DC fan and Vsp voltages corresponding to various speed gears. The method comprises the following steps:

[0160] S21. In response to a fan start instruction, obtain a preset fan speed.

[0161] The preset fan speed corresponds to any one of a plurality of speed gears.

[0162] S22. Determine the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal.

[0163] S23. If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

[0164] The second preset value is a threshold value of the difference between the fan speed corresponding to the current i-th gear and the target fan speed for the i-th gear. The second preset value may be pre-set by the manufacturer of the air-conditioning system.

[0165] Figure 6The illustrated embodiment provides at least the following beneficial effects: after receiving a fan start command, a preset fan speed corresponding to any one of a plurality of speed gears is obtained, and then the duty cycle of the PWM signal required to achieve the preset fan speed is determined by sending one or more PWM signals having different duty cycles to the built-in DC fan driver and obtaining the fan speed corresponding to each PWM signal. If the difference between the duty cycle of the PWM signal required to achieve the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameters is greater than a second preset value, this indicates that the difference between the duty cycle of the PWM signal required to achieve the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameters is significant, i.e., the fan cannot achieve the preset fan speed using the duty cycle of the gear corresponding to the preset fan speed in the control parameters. Therefore, the fan control parameters need to be corrected to ensure normal operation of the fan.

[0166] The following combination Figure 7 A control method for an air-conditioning system provided in an embodiment of the present application is described.

[0167] After power-on, determine whether to enter debug mode.

[0168] When in debug mode, obtain the startup Duty and Duty[i] for each speed gear. Dutymin is the startup Duty. In debug mode, with 50 rpm as the target speed, obtain the Duty value at 50 rpm as the startup Duty, or Dutymin. Duty[i] is obtained by continuously obtaining the Duty value for each corresponding speed through feedback adjustment based on the target fan speed required for each gear, and recording these values ​​in the EEPROM.

[0169] After obtaining the startup Duty and Duty[i] at each speed gear, obtain Duty0 corresponding to Rpm0.

[0170] After obtaining Duty0 corresponding to Rpm0, the control parameters of the fan are recorded in EEPROM.

[0171] After recording the fan control parameters in the EEPROM, operate the outdoor unit.

[0172] Start the fan without entering commissioning mode.

[0173] Get Duty1 under Rpm0.

[0174] It is determined whether the difference between Duty0 and Duty1 is less than a first preset value.

[0175] When the difference between Duty0 and Duty1 is smaller than the first preset value, the outdoor unit is operated.

[0176] When the difference between Duty0 and Duty1 is greater than a first preset value, the control parameters of the fan are corrected.

[0177] After correcting the control parameters of the fan, Duty[i] is obtained again.

[0178] After re-obtaining Duty[i], update the value of Duty0.

[0179] After updating the value of Duty0, operate the outdoor unit.

[0180] The following combination Figure 8 , another air-conditioning system control method provided in an embodiment of the present application is described.

[0181] The fan commissioning mode begins.

[0182] Get the target fan speed Rpm[i] for the i-th gear.

[0183] After obtaining the target fan speed Rpm[i] of the i-th gear, a PWM signal corresponding to the target fan speed Rpm[i] is sent to the built-in DC fan driver.

[0184] After sending the PWM signal corresponding to the target fan speed Rpm[i] to the built-in DC fan, the actual fan speed of the current i-th speed gear is obtained.

[0185] Determine whether the difference between the target fan speed Rpm[i] and the actual fan speed Rpm of the current i-th speed gear is less than a first preset value.

[0186] If the difference between the target fan speed Rpm[i] and the actual fan speed Rpm of the current i-th speed gear is less than a first preset value, the actual fan speed Rpm of the current i-th speed gear is recorded in the EEPROM as the new Rpm[i].

[0187] If the difference between the target fan speed Rpm[i] and the actual fan speed Rpm of the current i-th speed gear is greater than the first preset value, Duty0'=Duty0+Dutybase*{(Rpm[i]-Rpm) / |(Rpm[i]-Rpm)|}.

[0188] Duty0' is recorded in the EEPROM as the duty cycle of the PWM signal corresponding to the new preset fan speed, and the PWM signal corresponding to the target fan speed Rpm[i] is continued to be sent to the built-in DC fan driver.

[0189] The following combination Figure 9 , another air-conditioning system control method provided in an embodiment of the present application is described.

[0190] The fan starts.

[0191] Control and drive the built-in DC fan to rotate at the target fan speed Rpm[i].

[0192] Obtain Duty1 when the duty cycle of the PWM signal actually reaches the target fan speed Rpm[i].

[0193] It is determined whether the difference between Duty1 of the duty cycle of the PWM signal when the target fan speed Rpm[i] is actually reached and Duty0 of the duty cycle of the PWM signal corresponding to the preset fan speed is greater than a second preset value.

[0194] When the difference between Duty1 of the PWM signal duty cycle when the target fan speed Rpm[i] is actually reached and Duty0 of the PWM signal duty cycle corresponding to the preset fan speed is less than a second preset value, the outdoor unit is controlled to operate.

[0195] When the difference between Duty1 of the PWM signal duty cycle when the target fan speed Rpm[i] is actually reached and Duty0 of the PWM signal duty cycle corresponding to the preset fan speed is greater than a second preset value, the control parameters of the fan are corrected.

[0196] After the control parameters of the fan are corrected, the duty cycle Duty[i] of the PWM signal of the target fan speed at the i-th speed gear is obtained.

[0197] The duty cycle Duty[i] of the PWM signal of the target fan speed at the i-th speed gear is recorded in the EEPROM as the duty cycle Duty0 of the PWM signal corresponding to the new preset fan speed.

[0198] It can be seen that the above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the embodiment of the present application provides hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the modules and algorithm steps of each example described in the embodiment disclosed herein, the embodiment of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0199] In the embodiment of the present application, the controller can be divided into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. Optionally, the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0200] The present application also provides a hardware structure diagram of a controller, such as Figure 10 As shown, the controller 40 further includes a processor 401 and, optionally, a memory 402 and a communication interface 403 connected to the processor 401. The processor 401, the memory 402 and the communication interface 403 are connected via a bus 404.

[0201] Processor 401 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 401 may also be any other device having processing functionality, such as a circuit, a device, or a software module. Processor 401 may also include multiple CPUs, and processor 401 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

[0202] The memory 402 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, and the present embodiment of the application does not impose any restrictions on this. The memory 402 may exist independently or be integrated with the processor 401. Among them, the memory 402 may contain computer program code. The processor 401 is used to execute the computer program code stored in the memory 402, thereby realizing the control method provided in the embodiment of the present application.

[0203] The communication interface 403 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 403 can be a module, a circuit, a transceiver or any device that can achieve communication.

[0204] The bus 404 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 404 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0205] An embodiment of the present application further provides a computer-readable storage medium, comprising computer-executable instructions, which, when executed on a computer, enables the computer to execute any one of the air-conditioning system control methods provided in the above embodiments.

[0206] An embodiment of the present application further provides a computer program product comprising computer-executable instructions, which, when executed on a computer, enables the computer to execute any one of the air-conditioning system control methods provided in the above embodiments.

[0207] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer-executable instructions. When the computer-executable instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer-executable instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer-executable instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0208] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and implement other changes to the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0209] Although the present application has been described with reference to specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

[0210] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An air conditioning system, characterized in that: include: A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence; an indoor unit comprising the indoor heat exchanger; an outdoor unit comprising the compressor and the outdoor heat exchanger; A built-in DC fan driver is provided in the outdoor unit and / or in the indoor unit, the built-in DC fan driver comprising a driver module and a fan, the driver module being configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal to drive the fan to operate at one of a plurality of preset speed gears, wherein different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles; The controller is electrically connected to the driving built-in DC fan and is configured to: In response to an instruction to enter a fan debugging mode, a plurality of PWM signals are sequentially sent to the driver built-in DC fan, and a fan speed corresponding to each of the PWM signals is obtained; the plurality of PWM signals have different duty cycles; According to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, control parameters for driving the built-in DC fan are obtained, wherein the control parameters include a startup duty cycle and multiple gear duty cycles, the Vsp voltage corresponding to the startup duty cycle is the startup voltage for driving the built-in DC fan, and the Vsp voltage corresponding to each gear duty cycle in the multiple gear duty cycles corresponds to each speed gear; The controller executes the sending of multiple PWM signals to the built-in DC fan in sequence and obtains the fan speed corresponding to each PWM signal, and is further configured as follows: For a target fan speed, sending an i-th PWM signal to the driving built-in DC fan, and obtaining a fan speed corresponding to the i-th PWM signal; the target fan speed corresponds to any one of the multiple speed gears; i≥1, i is an integer; If the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, an i+1-th PWM signal is sent to the driver of the built-in DC fan, and the duty cycle of the i+1-th PWM signal is greater than the duty cycle of the i-th PWM signal.

2. The air conditioning system according to claim 1, characterized in that If the fan speed corresponding to the i-th PWM signal is less than the target fan speed, and the difference between the target fan speed and the fan speed corresponding to the i-th PWM signal is greater than a first preset value, it is determined that the fan speed corresponding to the i-th PWM signal has not reached the target fan speed.

3. The air conditioning system according to claim 1 or 2, characterized in that: When the fan speed corresponding to the i-th PWM signal is less than the target fan speed, the duty cycle of the (i+1)-th PWM signal is the sum of the duty cycle of the i-th PWM signal and a preset duty cycle adjustment value; When the fan speed corresponding to the i-th PWM signal is greater than the target fan speed, the duty cycle of the (i+1)-th PWM signal is the difference between the duty cycle of the i-th PWM signal and a preset duty cycle adjustment value.

4. The air conditioning system according to claim 1, characterized in that The controller is further configured to: In response to a fan start instruction, obtaining a preset fan speed, wherein the preset fan speed corresponds to any one of the plurality of speed gears; Determining the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal; If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the gear duty cycle corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference.

5. The air conditioning system according to claim 4, characterized in that The controller performs the correction of the control parameter according to the difference, and is further configured to: Determine a correction value based on the difference; when the difference is positive, the correction value is half of the difference; when the difference is negative, the correction value is the difference; The correction value is used to correct each duty cycle in the control parameter, and the corrected duty cycle is the sum of the duty cycle before correction and the correction value.

6. An air conditioning system, characterized in that: include: A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence; an indoor unit comprising the indoor heat exchanger; an outdoor unit comprising the compressor and the outdoor heat exchanger; A driver for a built-in DC fan is provided in the outdoor unit and / or the indoor unit, comprising a driver module and a fan, wherein the driver module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal, so as to drive the fan to operate at one of a plurality of preset speed gears, wherein different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles; A controller electrically connected to the built-in DC fan driver, wherein the air conditioning system is pre-set with control parameters for the built-in DC fan driver, the control parameters including a Vsp starting voltage corresponding to the built-in DC fan driver and Vsp voltages corresponding to various speed gears; The controller is configured to: In response to a fan start instruction, obtaining a preset fan speed, wherein the preset fan speed corresponds to any one of the plurality of speed gears; Determining the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal; If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference; The controller executes the sending of one or more PWM signals with different duty cycles to the driving built-in DC fan, and obtains the fan speed corresponding to each PWM signal, and is further configured as follows: For a target fan speed, sending an i-th PWM signal to the driving built-in DC fan, and obtaining a fan speed corresponding to the i-th PWM signal; the target fan speed corresponds to any one of the multiple speed gears; i≥1, i is an integer; If the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, an i+1-th PWM signal is sent to the driver of the built-in DC fan, and the duty cycle of the i+1-th PWM signal is greater than the duty cycle of the i-th PWM signal.

7. A method for controlling an air conditioning system, characterized in that: The air conditioning system comprises: A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence; an indoor unit comprising the indoor heat exchanger; an outdoor unit comprising the compressor and the outdoor heat exchanger; A driver for a built-in DC fan is provided in the outdoor unit and / or the indoor unit, comprising a driver module and a fan, wherein the driver module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal, so as to drive the fan to operate at one of a plurality of preset speed gears, wherein different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles; The method comprises: In response to an instruction to enter a fan debugging mode, a plurality of PWM signals are sequentially sent to the driver built-in DC fan, and a fan speed corresponding to each of the PWM signals is obtained; the plurality of PWM signals have different duty cycles; According to the duty cycle of each PWM signal and the fan speed corresponding to each PWM signal, control parameters for driving the built-in DC fan are obtained, wherein the control parameters include a startup duty cycle and multiple gear duty cycles, the Vsp voltage corresponding to the startup duty cycle is the startup voltage for driving the built-in DC fan, and the Vsp voltage corresponding to each gear duty cycle in the multiple gear duty cycles corresponds to each speed gear; The step of sequentially sending a plurality of PWM signals to the built-in DC fan and obtaining the fan speed corresponding to each of the PWM signals includes: For a target fan speed, send an i-th PWM signal to the driver built-in DC fan, and obtain the fan speed corresponding to the i-th PWM signal; the target fan speed corresponds to any one of the multiple speed gears; i≥1, i is an integer; If the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, an i+1-th PWM signal is sent to the driver of the built-in DC fan, and the duty cycle of the i+1-th PWM signal is greater than the duty cycle of the i-th PWM signal.

8. A method for controlling an air conditioning system, characterized in that: The air conditioning system comprises: A refrigerant circulation loop includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger arranged in sequence; an indoor unit comprising the indoor heat exchanger; an outdoor unit comprising the compressor and the outdoor heat exchanger; A driver for a built-in DC fan is provided in the outdoor unit and / or the indoor unit, comprising a driver module and a fan, wherein the driver module is configured to receive a PWM signal and output a Vsp voltage to the fan according to a duty cycle of the PWM signal, so as to drive the fan to operate at one of a plurality of preset speed gears, wherein different speed gears correspond to different Vsp voltages, and different Vsp voltages correspond to different duty cycles; The air conditioning system is pre-set with control parameters for driving the built-in DC fan, and the control parameters include a Vsp starting voltage corresponding to the built-in DC fan and a Vsp voltage corresponding to each speed gear; The method comprises: In response to a fan start instruction, obtaining a preset fan speed, wherein the preset fan speed corresponds to any one of the plurality of speed gears; Determining the duty cycle of the PWM signal that reaches the preset fan speed by sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal; If the difference between the duty cycle of the PWM signal that reaches the preset fan speed and the duty cycle of the gear corresponding to the preset fan speed in the control parameter is greater than a second preset value, the control parameter is corrected according to the difference; The step of sending one or more PWM signals with different duty cycles to the built-in DC fan and obtaining the fan speed corresponding to each PWM signal includes: For a target fan speed, send an i-th PWM signal to the driver built-in DC fan, and obtain the fan speed corresponding to the i-th PWM signal; the target fan speed corresponds to any one of the multiple speed gears; i≥1, i is an integer; If the fan speed corresponding to the i-th PWM signal does not reach the target fan speed, an i+1-th PWM signal is sent to the driver of the built-in DC fan, and the duty cycle of the i+1-th PWM signal is greater than the duty cycle of the i-th PWM signal.

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