Central air conditioning system and control method thereof

Abstract

The present application provides a central air conditioning system and a control method thereof, relating to the field of communication technology. The central air conditioning system includes: an indoor unit; an outdoor unit; an antenna, the antenna being connected to the outdoor unit via a welding wire; and a controller, the controller being configured to: periodically detect the transmission parameters of the current antenna configuration scheme, the transmission parameters including signal reception sensitivity and signal transmission rate; when the signal reception sensitivity is less than a preset signal reception sensitivity or the signal transmission rate is less than a preset signal transmission rate, detect the channel parameters of the current antenna configuration scheme; store the channel parameters of the current antenna configuration scheme in a rule base; update the signal level of each antenna configuration scheme in the rule base based on the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme; and determine a target antenna configuration scheme based on the signal level, the target antenna configuration scheme being the antenna configuration scheme with the highest signal level among the antenna configuration schemes.

Description

Technical Field

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

[0002] At present, central air-conditioning systems usually use wireless communication technology to access the network, and the antenna is the necessary channel for wireless signals to enter and exit. Therefore, the signal reception and transmission quality of the antenna has a decisive influence on the quality of the central air-conditioning system.

[0003] However, because the installation of central air conditioning systems is more complex than that of other wireless terminal devices, there are cases where the antenna's installation location after setup doesn't meet the user's actual wireless signal distance requirements. For example, signal obstruction or incomplete coverage can prevent the antenna from achieving optimal RF performance, leading to instability in the central air conditioning system during subsequent user use, impacting the user experience.

[0004] Therefore, how to configure the position of the central air-conditioning system antenna according to actual conditions is an urgent problem to be solved. Summary of the Invention

[0005] An embodiment of the present application provides a central air-conditioning system and a control method thereof, which is used to update the signal levels of multiple antenna configuration schemes in a rule base when the communication quality of the central air-conditioning system does not meet the usage requirements, so as to determine the target antenna configuration scheme with the best communication quality.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] In a first aspect, a central air conditioning system is provided, comprising: an indoor unit;

[0008] Outdoor unit;

[0009] Antenna, the antenna is connected to the outdoor unit through welding wires;

[0010] The controller is electrically connected to the indoor unit, the outdoor unit, and the antenna, and is configured to:

[0011] Periodically detect the transmission parameters of the current antenna configuration scheme, including signal receiving sensitivity and signal transmission rate;

[0012] When the signal receiving sensitivity is less than the preset signal receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, detecting the channel parameters of the current antenna configuration scheme;

[0013] Storing the channel parameters of the current antenna configuration scheme in a rule base, where the rule base is used to store multiple antenna configuration schemes and the channel parameters of each antenna configuration scheme;

[0014] Update the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme;

[0015] A target antenna configuration scheme is determined according to the signal level. The target antenna configuration scheme is the antenna configuration scheme with the highest signal level among all antenna configuration schemes.

[0016] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: After the antenna of the central air-conditioning system is installed, the environment around the antenna of the central air-conditioning system is not static, and there may be signal blocking or incomplete signal coverage, which makes the antenna unable to achieve better RF performance. To this end, the embodiment of the present application periodically detects the transmission parameters of the current antenna configuration scheme, and determines whether the environment of the current antenna has changed based on the transmission parameters. When the signal receiving sensitivity is less than the preset signal receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, it indicates that the environment of the current antenna has changed, and the current antenna configuration scheme cannot meet the use requirements of the central air-conditioning. To this end, the embodiment of the present application updates the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme, so as to select the target antenna configuration scheme with the best signal level according to the updated signal level. In this way, it can be avoided that the antenna configuration scheme does not meet the current environmental requirements during the use of the central air-conditioning system, and the central air-conditioning system state is unstable.

[0017] In some embodiments, the controller is further configured to: configure the antenna with a signal transmission power corresponding to the target antenna configuration scheme.

[0018] Configuring the antenna with the signal transmission power corresponding to the target antenna configuration scheme can optimize the communication effect of the central air-conditioning system under the target antenna configuration scheme, thereby improving the communication quality of the central air-conditioning system, ensuring the stability of the communication status of the central air-conditioning system, and improving the user experience.

[0019] In some embodiments, the above-mentioned channel parameters include signal reception strength, signal-to-noise ratio, and signal-to-interference ratio; the controller executes the channel parameters according to each antenna configuration scheme, and updates the signal level of each antenna configuration scheme in the rule base, and is specifically configured as: according to the signal reception strength, signal-to-noise ratio, and signal-to-interference ratio of each antenna configuration scheme in the rule base, updates the signal level of each antenna configuration scheme in the rule base.

[0020] As can be seen from the above embodiments, in many cases, the communication between the server and the central air conditioning system is blocked or covered by obstacles such as walls, trees, and other objects. Each signal bounce may cause phase shift, time delay, attenuation, and distortion, each of which will ultimately cause interference at the receiving antenna. Destructive interference in the wireless link can lead to a decrease in the performance of the central air conditioning system. The received signal strength indicator (RSSI), signal-to-noise ratio (SNR), and signal-to-interference plus noise ratio (SINR) are commonly used to evaluate signal quality. Among them, the received signal strength is a measure of the wireless signal between the server and the central air conditioning system. The signal-to-noise ratio refers to the ratio of the transmitted signal to the noise. The larger the signal-to-noise ratio, the smaller the proportion of noise in the transmitted signal and the better the noise reduction effect. The signal-to-interference ratio refers to the ratio of the strength of the received useful signal to the strength of the received interference signal. Based on the received signal strength, signal-to-noise ratio, and signal-to-interference ratio in each antenna configuration scheme, the signal transmission effect of each antenna configuration scheme can be determined. Since the signal level can reflect the quality of the antenna configuration scheme, the quality of each antenna configuration scheme can be intuitively judged according to the signal levels of multiple antenna configuration schemes.

[0021] In some embodiments, the above-mentioned channel parameters include a signal error vector and a packet loss rate; the controller is also configured to: delete antenna configuration schemes in which the signal reception sensitivity is less than a preset signal reception sensitivity, the signal transmission rate is less than a preset signal transmission rate, the signal error vector is greater than a preset signal error vector, and the packet loss rate is greater than a preset packet loss rate.

[0022] It can be seen from the above embodiments that if the signal receiving sensitivity in the antenna configuration scheme is less than the preset signal receiving sensitivity, the signal transmission rate is less than the preset signal transmission rate, the signal error vector is greater than the preset signal error vector, or the packet loss rate is greater than the preset packet loss rate, it means that the communication quality under the antenna configuration scheme cannot meet the communication requirements of the central air-conditioning system. If the antenna is set according to this antenna configuration scheme, it may affect the stability of the central air-conditioning system and affect the user experience.

[0023] In some embodiments, the central air-conditioning system provided by the embodiments of the present application also includes a display device; the controller is further configured to: display the antenna field pattern, signal transmission power and channel parameters of the target antenna configuration scheme through the display device.

[0024] It can be seen from the above embodiments that the display module can directly display the signal transmission power and channel parameters of the antenna in the target antenna configuration scheme to the operator, making it convenient for the operator to configure or adjust the antenna field type, signal transmission power and channel parameters according to the target antenna configuration scheme.

[0025] In some embodiments, the controller is further configured to issue a prompt indicating poor signal quality when detecting that the signal receiving sensitivity of the current antenna configuration scheme is less than a preset receiving sensitivity or the signal transmission rate is less than a preset signal transmission rate.

[0026] As can be seen from the above embodiment, if the signal reception sensitivity of the current antenna configuration is detected to be less than a preset reception sensitivity or the signal transmission rate is detected to be less than a preset signal transmission rate, it indicates that the communication quality of the central air conditioning system cannot meet the usage requirements of the central air conditioning system and communication interruption may occur. In this case, a prompt indicating poor signal quality can be issued to prompt the user to adjust the current antenna configuration.

[0027] In a second aspect, an embodiment of the present application provides a control method for a central air-conditioning system, the central air-conditioning system comprising:

[0028] Indoor unit;

[0029] Outdoor unit;

[0030] Antenna, the antenna is connected to the outdoor unit through welding wires;

[0031] The method includes:

[0032] Periodically detect the transmission parameters of the current antenna configuration scheme, including signal receiving sensitivity and signal transmission rate;

[0033] When the signal receiving sensitivity is less than the preset signal receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, detecting the channel parameters of the current antenna configuration scheme;

[0034] Storing the channel parameters of the current antenna configuration scheme in a rule base, where the rule base is used to store multiple antenna configuration schemes and the channel parameters of each antenna configuration scheme;

[0035] Update the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme;

[0036] A target antenna configuration scheme is determined according to the signal level. The target antenna configuration scheme is the antenna configuration scheme with the highest signal level among all antenna configuration schemes.

[0037] In a third 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 code, the computer program code includes computer instructions, and when the one or more processors execute the computer instructions, the controller executes the control method provided in the second aspect.

[0038] In a fourth 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 method provided in the second aspect and possible implementation methods.

[0039] In the fifth 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 method provided in the second aspect and possible implementation methods.

[0040] 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.

[0041] The beneficial effects described in the second to fifth aspects of this application can be analyzed by referring to the beneficial effects of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 A schematic diagram of an application scenario of a central air-conditioning system provided in an embodiment of the present application;

[0044] Figure 2 A schematic structural diagram of a central air-conditioning system provided in an embodiment of the present application;

[0045] Figure 3 A schematic structural diagram of another central air-conditioning system provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of the refrigeration cycle principle of a central air-conditioning system provided in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of the heating cycle principle of a central air-conditioning system provided in an embodiment of the present application;

[0048] Figure 6 A schematic diagram of signal radiation from a directional antenna provided in an embodiment of the present application;

[0049] Figure 7 A schematic diagram of signal radiation from an omnidirectional antenna provided in an embodiment of the present application;

[0050] Figure 8 A schematic diagram of signal radiation of an antenna provided in an embodiment of the present application;

[0051] Figure 9 A schematic diagram of the hardware structure of a controller provided in an embodiment of the present application.

[0052] Figure 10 A flow chart of a control method for a central air-conditioning system provided in an embodiment of the present application;

[0053] Figure 11 A schematic diagram of an antenna fixing position provided in an embodiment of the present application;

[0054] Figure 12 A schematic diagram of the hardware structure of another controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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 the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] In the actual application of wireless data transmission in central air-conditioning systems, when multiple central air-conditioning systems communicate with the server at the same time, such as Figure 1 As shown, central air conditioning system 1 sends data request instructions to the server via transmission channel 1, and central air conditioning system 2 sends data request instructions via transmission channel 2. After receiving the data request instructions, the server sends data in response to the request to central air conditioning system 1 and central air conditioning system 2. After completing this data transmission, central air conditioning system 1 and central air conditioning system 2 send data request instructions again after a fixed period of time via the previously established transmission channel 1 and transmission channel 2. Because multiple central air conditioning systems send data request instructions simultaneously, transmission channel preemption and interference may occur, affecting the signal transmission rate. At the same time, the number of avoidances and channel preemption duration will also affect the signal transmission quality. It can be seen that the transmission and reception quality of the central air conditioning system antenna has a significant impact on the performance of the central air conditioning system.

[0063] At present, the number of central air-conditioning systems that use wireless communication technology to access the network is increasing. Most of the data transmitted by central air-conditioning systems through wireless communication is control signals. Since the amount of control signal data is small but the signal range to be covered is large, the wireless communication of central air-conditioning systems has relatively low requirements for signal transmission rate and relatively high requirements for signal transmission distance. However, in the related art, most of them use omnidirectional antennas or directional antennas. The installation position of the antenna is fixed during the installation of the central air-conditioning system. Therefore, during the later use of the central air-conditioning system, the position or working mode of the antenna cannot be adjusted according to actual conditions. For example, when other new antennas appear around the antenna installation position of the central air-conditioning system, the new antennas will affect the signal transmission of the central air-conditioning system, resulting in the signal coverage range not meeting the actual use of the central air-conditioning system. For example, during the use of the central air-conditioning system, signal obstruction or incomplete signal coverage may occur, making it impossible for the antenna to achieve better RF performance, resulting in the central air-conditioning system being unstable during the use of the central air-conditioning system by users, affecting the user experience.

[0064] In view of this, the embodiment of the present application updates the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme, thereby selecting the target antenna configuration scheme with the best signal level according to the updated signal level. In this way, it can avoid the situation where the antenna configuration scheme does not meet the current environmental requirements during the use of the central air-conditioning system, and avoid the situation where the central air-conditioning system becomes unstable.

[0065] To further describe the technical solutions of the embodiments of the present application, Figure 2 Shown is a structural diagram of a central air-conditioning system provided in an embodiment of the present application.

[0066] Reference Figure 2 The central air conditioning system 1 includes an indoor unit 10, an outdoor unit 20, a connecting pipe 30, an antenna 40 and a controller 50 (the controller 50 is in Figure 2 not shown).

[0067] The indoor unit 10 is used to exchange heat with the indoor air, thereby cooling or heating the indoor air.

[0068] For example, the indoor unit 10 can be an indoor hanging unit or an indoor cabinet unit. Figure 2 As shown in FIG, for example, the indoor hanging unit is usually installed on the indoor wall. It should be understood that the present application does not impose any restrictions on the form of the indoor unit 10.

[0069] In some embodiments, as Figure 3As shown, the indoor unit 10 includes at least an indoor heat exchanger 101, which is used to assist the refrigerant in exchanging heat with the indoor environment, thereby achieving cooling or heating of the indoor air.

[0070] For example, when the central air conditioning system 1 is in cooling mode, the indoor heat exchanger 101 works as an evaporator to help cool the indoor air. When the central air conditioning system 1 is in heating mode, the indoor heat exchanger 101 works as a condenser to help heat the indoor air.

[0071] The outdoor unit 20 is usually set outdoors to assist the indoor unit 10 in completing the heat exchange of the indoor environment. Figure 2 In FIG. 1 , the outdoor unit 20 is located outdoors on the opposite side of the indoor unit 10 across a wall surface, and therefore is indicated by a dotted line.

[0072] It should be noted that the central air-conditioning system 1 provided in the embodiment of the present application may include one or more indoor units 10 and one or more outdoor units 20, and the embodiment of the present application does not impose any restrictions on this.

[0073] In some embodiments, continuing as Figure 3 As shown, the outdoor unit 20 may include: an outdoor heat exchanger 201 , a compressor 202 , a four-way valve 203 and a gas-liquid separator 204 .

[0074] In some embodiments, the four ports of the four-way valve 203 can be respectively connected to the exhaust port of the compressor 202, the outdoor heat exchanger 201, the gas-liquid separator 204, and the indoor heat exchanger 101. It should be understood that the term "connected" here does not mean that other components cannot exist between the ports of the four-way valve 203 and the components connected to them. For example, components such as an expansion valve can also exist to achieve throttling control, and this application does not impose specific limitations on this.

[0075] Reference Figure 4 and Figure 5 The four-way valve 203 can realize the mutual conversion between the cooling mode and the heating mode by changing the flow direction of the refrigerant in the system pipeline.

[0076] like Figure 4 As shown, when the four-way valve 203 connects the exhaust port of the compressor 202 and the indoor heat exchanger 101, the refrigerant flows as shown by the arrow, the indoor heat exchanger 101 works as an evaporator, and the outdoor heat exchanger 201 works as a condenser to achieve cooling of the indoor air.

[0077] like Figure 5 As shown, when the four-way valve 203 connects the exhaust port of the compressor 202 and the outdoor heat exchanger 201, the refrigerant flows as shown by the arrow, the outdoor heat exchanger 201 works as an evaporator, and the indoor heat exchanger 101 works as a condenser to achieve heating of the indoor air.

[0078] In some embodiments, the compressor 202 is used to provide power for the refrigerant circulation. The compressor 202 compresses the refrigerant delivered by the gas-liquid separator 204 and delivers the compressed refrigerant to the indoor heat exchanger 101 (such as Figure 4 As shown) or outdoor heat exchanger 201 (as Figure 5 Optionally, the compressor 202 may be a variable capacity inverter compressor 202 controlled based on the speed of the inverter.

[0079] In some embodiments, the outdoor heat exchanger 201 is used as a condenser or an evaporator. The refrigerant flowing in the outdoor heat exchanger 201 exchanges heat with the outdoor air, which can assist the indoor heat exchanger 101 in achieving cooling or heating. When the outdoor heat exchanger 201 works as an evaporator, the indoor heat exchanger heats (e.g., Figure 5 In the case where the outdoor heat exchanger 201 works as a condenser, the indoor heat exchanger 101 cools (as shown in Figure 4 shown).

[0080] In some embodiments, one end of the gas-liquid separator 204 is connected to the compressor 202, and the other end is connected to the outdoor heat exchanger 201 (such as Figure 4 ) or the indoor heat exchanger 101 is connected (as shown) Figure 5 As shown), to accommodate the refrigerant in the liquid return portion of the refrigerant cycle to prevent liquid hammer on the compressor 202.

[0081] Furthermore, the gas-liquid separator 204 may also deliver the acquired or stored refrigerant to the compressor 202 for compression.

[0082] The connecting pipe 30 is used to connect the indoor unit 10 and the outdoor unit 20 to form a loop for the circulation of a refrigerant (also called a refrigerant, which will not be described in detail below), thereby completing the heat exchange between the indoor unit 10 and the indoor air.

[0083] In some embodiments, the antenna 40 is used to transmit or receive signals to implement the communication function of the central air-conditioning system.

[0084] Optionally, the antenna 40 is connected to the outdoor unit 20 via welding wires. Each antenna 40 may include multiple branch antennas. By changing the antenna's location, angle, and transmission parameters, the antenna's communication quality may be adjusted. The antenna may be a directional antenna or an omnidirectional antenna. The radiation pattern of a directional antenna is as follows: Figure 6 As shown, the radiation pattern of the omnidirectional antenna is as follows Figure 7 It should be understood that the number of antennas in the antenna configuration solution can be one or more, and the embodiments of the present application do not impose any limitation on this.

[0085] Among them, each antenna can produce multiple possible radiation patterns, such as Figure 8 Radiation pattern 1, radiation pattern 2, radiation pattern 3, and radiation pattern 4 shown in the figure present different radiation patterns among multiple possible radiation patterns. This technology is called "simulated antenna technology". Based on the simulated antenna technology, multiple antenna configuration schemes can be established, so as to determine the target antenna configuration scheme with the best communication effect among multiple antenna configuration schemes, thereby optimizing the performance of the transmission channel.

[0086] In some embodiments, as Figure 9 As shown, the indoor unit 10, the outdoor unit 20 and the antenna 40 are electrically connected to the controller 50. The controller refers to a device that can generate an operation control signal based on the instruction operation code and the timing signal to instruct the central air-conditioning system 1 to execute the control instruction. Exemplarily, the controller can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The controller can 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.

[0087] In some embodiments, the controller may be a microcontroller unit (MCU). An MCU, also known as a single-chip microcomputer or single-chip microcomputer, is a CPU with a 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 diverse control combinations for different applications.

[0088] In addition, the controller can be used to control the operation of various components in the central air-conditioning system 1, so that the various components of the central air-conditioning system 1 operate to achieve various predetermined functions of the central air-conditioning system 1.

[0089] In some embodiments, the central air conditioning system 1 may further include a signal detection module 60 and a signal analysis module 70. Figure 9 As shown, the signal detection module 60 and the signal analysis module 70 are electrically connected to the controller 50 .

[0090] The signal detection module 60 is used to detect the channel parameters of the antenna 40 .

[0091] Optionally, the signal detection module 60 can be integrated into the outdoor unit 20 and / or the antenna 40, and the channel parameters of the antenna 40 can include one or more of the signal reception strength, signal error vector, signal-to-interference ratio, packet loss rate and signal-to-noise ratio.

[0092] In some embodiments, the channel parameters may further include: one or more of: signal transmission duration, signal transmission rate, channel occupation duration, number of avoidance times, and signal reception sensitivity.

[0093] The signal analysis module 70 is used to analyze the signal level of the antenna configuration scheme, wherein the antenna configuration scheme includes the setting position, setting angle and transmission parameters of at least one antenna. The signal level is used to indicate the quality of the antenna configuration scheme.

[0094] Illustratively, the higher the signal level of the antenna configuration scheme, the higher the communication quality of the antenna configuration scheme.

[0095] In some embodiments, the central air-conditioning system 1 may further include a display module, which is electrically connected to the controller.

[0096] Optionally, the display module is used to display the signal level of each antenna configuration scheme. For example, the display module can be used to display channel parameters such as the actual transmission power, preset transmission power, etc. of one or more antenna configuration schemes, as well as display the signal level of one or more antenna configuration schemes.

[0097] Optionally, when the display module and the touch panel are superimposed on each other in the form of layers to form a touch screen, the display unit can be used as an input device and an output device. The display module may include at least one of a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), an organic light emitting diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays can be constructed to be transparent to allow a user to view from the outside, which can be called a transparent display. Typical transparent displays can be, for example, TOLED (transparent organic light emitting diode) displays and the like. The touch screen can be used to detect touch input pressure, touch input position, and touch input area. The display module can transmit user instructions to the controller based on the user's touch input to realize human-computer interaction functions. The specific type, size, resolution, etc. of the display module are not limited. It can be understood by those skilled in the art that the display module can make some changes in performance and configuration as needed.

[0098] It should be understood that the illustrated structures of the embodiments of the present invention do not constitute a specific limitation on central air conditioning systems. In other embodiments of the present application, the central air conditioning system may include more or fewer components than illustrated, 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.

[0099] The following is a detailed introduction to the embodiments of the present application in conjunction with the accompanying drawings.

[0100] like Figure 10 As shown, an embodiment of the present application provides a control method for a central air-conditioning system, which is applied to a controller of the central air-conditioning system. The method includes the following steps:

[0101] S101: Periodically detect transmission parameters of the current antenna configuration scheme.

[0102] The transmission parameters include signal receiving sensitivity and signal transmission rate.

[0103] As a possible implementation manner, the signal receiving sensitivity and signal transmission rate of the current antenna configuration scheme are detected by a signal detection device. For example, the detection period may be 1 minute.

[0104] S102: When the signal receiving sensitivity is lower than the preset signal receiving sensitivity or the signal transmission rate is lower than the preset signal transmission rate, detect the channel parameters of the current antenna configuration solution.

[0105] Among them, the preset signal receiving sensitivity and the preset signal transmission rate can be set by the developer at the factory, or can be set by the user, and the embodiments of the present application do not impose any restrictions on this.

[0106] Optionally, the channel parameters may include one or more of signal reception strength, signal error vector, signal-to-interference ratio, packet loss rate, signal-to-noise ratio, signal transmission time, signal transmission rate, channel preemption time, number of avoidance times, and signal reception sensitivity.

[0107] Among them, signal reception strength, signal error vector, packet loss rate, signal reception sensitivity, avoidance times, and channel preemption duration can be used as conditional parameters to determine whether the antenna configuration scheme meets the usage requirements. The signal transmission rate can be used as a statistical parameter. Signal reception strength, signal error vector, packet loss rate, signal transmission duration, channel preemption duration, and avoidance times can be obtained through measurement; signal sensitivity can be calculated by signal transmission power; signal-to-noise ratio can be calculated by signal transmission power and noise power; signal-to-interference ratio can be calculated by signal transmission power and noise power; signal transmission rate can be calculated by signal transmission power and signal-to-noise ratio; signal transmission power can be used as an adjustable parameter. Optionally, adjusting the signal transmission power can adjust the above conditional parameters and statistical parameters.

[0108] S103: Store the channel parameters of the current antenna configuration solution into a rule base.

[0109] The rule base is used to store multiple antenna configuration schemes and channel parameters of each antenna configuration scheme.

[0110] Exemplarily, the rule base can be as shown in Table 1 below. Taking the channel parameters of an antenna configuration scheme as an example, in the rule base, there are multiple statistical periods, such as T1, T2, T3, T4...Tn, and one or more of the signal transmission rate, signal receiving sensitivity, signal error vector, packet loss rate, number of avoidances and channel preemption time in each statistical period are counted.

[0111] Table 1

[0112]

[0113]

[0114] S104: Update the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme.

[0115] The signal level is used to characterize the quality of the antenna configuration solution.

[0116] As a possible implementation manner, the signal level of each antenna configuration scheme in the rule base is updated according to the signal reception strength, signal-to-noise ratio, and signal-to-interference ratio of each antenna configuration scheme in the rule base.

[0117] Exemplarily, the signal quality parameters of each antenna configuration scheme in the rule base are determined based on the product of the signal reception strength, signal-to-noise ratio, and signal-to-interference ratio of each antenna configuration scheme. This step can be implemented as the following steps S1041-S1043:

[0118] S1041: Determine the level of transmission rate and the level of transmission power in each antenna configuration scheme in the rule base.

[0119] For example, the signal transmission rate level can be determined by the signal transmission rate in the channel parameters in Table 1, and the signal power level can be determined according to the signal transmission power. As shown in Table 2, when the signal transmission rate is greater than 10Mbit / s, the signal transmission rate level is determined to be 3; when the signal transmission rate is greater than 5Mbit and less than or equal to 10Mbit / s, the signal transmission rate level is determined to be 2; when the signal transmission rate is greater than 1Mbit and less than or equal to 5Mbit, the signal transmission rate level is determined to be 1. When the signal transmission power is greater than or equal to 15dBm, the signal transmission power level is 1; when the signal transmission power is greater than or equal to 17dBm, the signal transmission power level is 2; when the signal transmission power is greater than or equal to 19dBm, the signal transmission power level is 3. Among them, level 3 is better than level 2, and level 2 is better than level 1.

[0120] Table 2

[0121]

[0122] S1042: Determine a signal quality parameter score for each antenna configuration scheme according to the transmission rate level and the transmission power level of each antenna configuration scheme.

[0123] For example, combining Table 1 and Table 2 can yield the signal quality parameters shown in Table 3. Figure 11 As shown, antenna configuration scheme 1 may include fixed position 1, fixed position 2 and fixed position 3, and antenna configuration scheme 2 may include fixed position 1, fixed position 2 and fixed position 3.

[0124] Table 3

[0125]

[0126] For example, the signal quality parameter score can be obtained by the following formula:

[0127] Q=RSSI*SNR*SIR*K

[0128] Among them, Q represents the signal quality parameter; RSSI represents the signal receiving sensitivity; SNR represents the signal-to-noise ratio; SIR represents the signal-to-interference ratio; the coefficient K can be obtained by K=0.7P+0.3M, P represents the signal transmission power, and M represents the signal transmission rate.

[0129] In scheme 1, K1.0=1, the quality parameter Q(1.0) of the antenna in fixed position 1 is: Q(1.0)=(-77)*5*4*1=-1540; K1.1=2, the quality parameter Q(1.1) of the antenna in fixed position 2 is: Q(1.1)=(-78)*5*3*2=-2340; K1.2=1.6, the quality parameter Q(1.2) of the antenna in fixed position 3 is: Q(1.2)=(-82)*4*3*1.6=-1574. In scheme 2, K2.0=1.3, the quality parameter Q(2.0) of the antenna in fixed position 1 is: Q(2.0)=(-78)*4*5*1.3=-2028, the quality parameter Q(2.1) of the antenna in fixed position 2 is: Q(2.1)=(-78)*5*3*1.7=-1989; K2.2=3, the quality parameter Q(2.2) of the antenna in fixed position 3 is: Q(2.2)=(-90)*4*3*3=-2500.

[0130] 1043. Determine the signal level of each antenna configuration scheme according to the signal quality parameter score of each antenna configuration scheme.

[0131] The larger the absolute value of the signal quality parameter score of the antenna configuration scheme is, the higher the signal level of the antenna configuration scheme is, and the communication effect of the antenna configuration scheme is the best.

[0132] In many cases, the communication between the server and the central air conditioning system is blocked or obscured by obstacles such as walls, trees, and other objects. Each signal bounce can cause phase shift, time delay, attenuation, and distortion, each of which ultimately generates interference at the receiving antenna. Destructive interference in the wireless link can lead to a decrease in the performance of the central air conditioning system. Signal quality is typically assessed using received signal strength indicator (RSSI), signal-to-noise ratio (SNR), and signal-to-interference plus noise ratio (SINR). RSSI is a measure of the wireless signal between the server and the central air conditioning system. The SNR refers to the ratio of the transmitted signal to the noise. A higher SNR indicates a lower proportion of noise in the transmitted signal, resulting in better noise reduction. The SNR refers to the ratio of the strength of the received useful signal to the strength of the received interfering signal. The signal-to-interference ratio (SINR) in each antenna configuration scheme can be used to determine the quality of the signal transmission. Since the signal level can reflect the quality of the antenna configuration scheme, the quality of each antenna configuration scheme can be intuitively judged according to the signal levels of multiple antenna configuration schemes.

[0133] S105: Determine a target antenna configuration scheme based on the signal level.

[0134] The target antenna configuration scheme is the antenna configuration scheme with the highest signal level among all antenna configuration schemes.

[0135] Figure 10 The embodiment shown brings at least the following beneficial effects: after the antenna of the central air-conditioning system is installed, the environment around the antenna of the central air-conditioning system is not static, and there may be signal obstruction or incomplete signal coverage, which makes the antenna unable to achieve better RF performance. In this regard, the embodiment of the present application periodically detects the transmission parameters of the current antenna configuration scheme, and determines whether the environment of the current antenna has changed based on the transmission parameters. When the signal receiving sensitivity is less than the preset signal receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, it indicates that the environment of the current antenna has changed, and the current antenna configuration scheme cannot meet the use requirements of the central air-conditioning. In this regard, the embodiment of the present application updates the signal level of each antenna configuration scheme in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each antenna configuration scheme, so as to select the target antenna configuration scheme with the best signal level according to the updated signal level. In this way, it can avoid the situation where the antenna configuration scheme does not meet the current environmental requirements during the use of the central air-conditioning system, and avoid the situation where the central air-conditioning system is unstable.

[0136] In some embodiments, the control method of the central air conditioning system provided in the embodiments of the present application further includes the following steps:

[0137] The antenna is configured with the signal transmission power corresponding to the target antenna configuration scheme.

[0138] It can be seen from the above embodiments that configuring the antenna with the signal transmission power corresponding to the target antenna configuration scheme can optimize the communication effect of the central air-conditioning system under the target antenna configuration scheme, thereby improving the communication quality of the central air-conditioning system and ensuring the stability of the communication status of the central air-conditioning system, thereby improving the user experience.

[0139] Optionally, the antenna configuration schemes whose signal reception sensitivity is less than the preset signal reception sensitivity, signal transmission rate is less than the preset signal transmission rate, signal error vector is greater than the preset signal error vector, and packet loss rate is greater than the preset packet loss rate are deleted from the rule base.

[0140] Among them, the preset signal error vector and the preset packet loss rate can be set by the developer at the factory or by the user, and the embodiment of the present application does not impose any restrictions on this.

[0141] It can be seen from the above embodiments that if the signal receiving sensitivity in the antenna configuration scheme is less than the preset signal receiving sensitivity, the signal transmission rate is less than the preset signal transmission rate, the signal error vector is greater than the preset signal error vector, or the packet loss rate is greater than the preset packet loss rate, it means that the communication quality under the antenna configuration scheme cannot meet the communication requirements of the central air-conditioning system. If the antenna is set according to this antenna configuration scheme, it may affect the stability of the central air-conditioning system and affect the user experience.

[0142] In some embodiments, the control method of the central air-conditioning system provided in the embodiments of the present application further includes the following steps: displaying the antenna field pattern, signal transmission power and channel parameters of the target antenna configuration scheme through a display device.

[0143] It can be seen from the above embodiments that the display module can directly display the signal transmission power and channel parameters of the antenna in the target antenna configuration scheme to the operator, making it convenient for the operator to configure or adjust the antenna field type, signal transmission power and channel parameters according to the target antenna configuration scheme.

[0144] In some embodiments, the control method of the central air-conditioning system provided in the embodiment of the present application also includes the following steps: when it is detected that the signal receiving sensitivity of the current antenna configuration scheme is less than the preset receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, a prompt message is issued to indicate poor signal quality.

[0145] Exemplarily, a prompt message of "poor communication quality" may be displayed in the display module.

[0146] As can be seen from the above embodiment, if the signal reception sensitivity of the current antenna configuration is detected to be less than a preset reception sensitivity or the signal transmission rate is detected to be less than a preset signal transmission rate, it indicates that the communication quality of the central air conditioning system cannot meet the usage requirements of the central air conditioning system and communication interruption may occur. In this case, a prompt indicating poor signal quality can be issued to prompt the user to adjust the current antenna configuration.

[0147] 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.

[0148] 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.

[0149] The present application also provides a hardware structure diagram of a controller, such as Figure 12 As shown, the controller 50 further includes a processor 501 and, optionally, a memory 502, a communication interface 503 and a display 505 connected to the processor 501. The processor 501, the memory 502, the communication interface 503 and the display 505 are connected via a bus 504.

[0150] The processor 501 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 processor 501 may also be any other device having a processing function, such as a circuit, a device, or a software module. The processor 501 may also include multiple CPUs, and the processor 501 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions). The processor 501 may be used to perform signal analysis.

[0151] The memory 502 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 502 may exist independently or be integrated with the processor 501. Among them, the memory 502 may contain computer program code. The processor 501 is used to execute the computer program code stored in the memory 502, thereby realizing the control method provided in the embodiment of the present application.

[0152] The communication interface 503 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 503 can be a module, a circuit, a transceiver or any device capable of achieving communication.

[0153] The bus 504 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 504 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 12 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.

[0154] Display 505 can be a liquid crystal display or an organic light-emitting diode (OLED) display. The specific type, size, and resolution of the display are not limited. Those skilled in the art will appreciate that the display can be modified in terms of performance and configuration as needed. Display 505 displays a graphic and channel parameters to the user, demonstrating the signal level of the antenna configuration.

[0155] An embodiment of the present application also provides a computer-readable storage medium, including computer-executable instructions, which, when executed on a computer, enables the computer to execute any one of the central air-conditioning system control methods provided in the above embodiments.

[0156] 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 central air-conditioning system control methods provided in the above embodiments.

[0157] 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)).

[0158] 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.

[0159] 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.

[0160] 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. A central air conditioning system, characterized in that: include: Indoor unit; Outdoor unit; an antenna connected to the outdoor unit via a welding wire; a controller electrically connected to the indoor unit, the outdoor unit, and the antenna, the controller being configured to: Periodically detecting transmission parameters of the current antenna configuration scheme, wherein the transmission parameters include signal receiving sensitivity and signal transmission rate; When the signal receiving sensitivity is less than a preset signal receiving sensitivity or the signal transmission rate is less than a preset signal transmission rate, detecting a channel parameter of a current antenna configuration scheme; Storing the channel parameters of the current antenna configuration scheme in a rule base, where the rule base is used to store multiple antenna configuration schemes and the channel parameters of each antenna configuration scheme; updating the signal level of each of the antenna configuration schemes in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each of the antenna configuration schemes; A target antenna configuration scheme is determined according to the signal level, where the target antenna configuration scheme is the antenna configuration scheme with the highest signal level among the antenna configuration schemes.

2. The central air conditioning system according to claim 1, characterized in that: The controller is further configured to: The antenna is configured with a signal transmission power corresponding to the target antenna configuration scheme.

3. The central air conditioning system according to claim 1 or 2, characterized in that: The channel parameters include signal reception strength, signal-to-noise ratio, and signal-to-interference ratio; the controller executes the channel parameters according to each antenna configuration scheme and updates the signal level of each antenna configuration scheme in the rule base, and is specifically configured as follows: The signal level of each antenna configuration scheme in the rule base is updated according to the signal reception strength, the signal-to-noise ratio, and the signal-to-interference ratio of each antenna configuration scheme in the rule base.

4. The central air conditioning system according to claim 1 or 2, characterized in that: The channel parameters include signal error vector and packet loss rate; The controller is further configured to: Delete the antenna configuration scheme in which the signal receiving sensitivity is less than the preset signal receiving sensitivity, the signal transmission rate is less than the preset signal transmission rate, the signal error vector is greater than the preset signal error vector, and the packet loss rate is greater than the preset packet loss rate.

5. The central air conditioning system according to claim 1 or 2, characterized in that: Also included is a display device; The controller is further configured to: The display device displays the antenna pattern, signal transmission power, and channel parameters of the target antenna configuration solution.

6. The central air conditioning system according to claim 1 or 2, characterized in that: The controller is further configured to: When it is detected that the signal receiving sensitivity of the current antenna configuration solution is less than the preset receiving sensitivity or the signal transmission rate is less than the preset signal transmission rate, a prompt message for prompting poor signal quality is issued.

7. A control method for a central air conditioning system, characterized in that: The central air-conditioning system includes: Indoor unit; Outdoor unit; an antenna connected to the outdoor unit via a welding wire; The method comprises: Periodically detecting transmission parameters of the current antenna configuration scheme, wherein the transmission parameters include signal receiving sensitivity and signal transmission rate; When the signal receiving sensitivity is less than a preset signal receiving sensitivity or the signal transmission rate is less than a preset signal transmission rate, detecting a channel parameter of a current antenna configuration scheme; Storing the channel parameters of the current antenna configuration scheme in a rule base, where the rule base is used to store multiple antenna configuration schemes and the channel parameters of each antenna configuration scheme; updating the signal level of each of the antenna configuration schemes in the rule base according to the channel parameters of the current antenna configuration scheme and the channel parameters of each of the antenna configuration schemes; A target antenna configuration scheme is determined according to the signal level, where the target antenna configuration scheme is the antenna configuration scheme with the highest signal level among the antenna configuration schemes.

8. The method according to claim 7, characterized in that The method further comprises: The antenna is configured with a signal transmission power corresponding to the target antenna configuration scheme.

9. The method according to claim 7 or 8, characterized in that The channel parameters include signal reception strength, signal-to-noise ratio, and signal-to-interference ratio; and updating the signal level of each antenna configuration scheme in the rule base according to the channel parameters of each antenna configuration scheme includes: The signal level of each antenna configuration scheme in the rule base is updated according to the signal reception strength, the signal-to-noise ratio, and the signal-to-interference ratio of each antenna configuration scheme in the rule base.

10. The method according to claim 7 or 8, characterized in that The channel parameters include a signal error vector and a packet loss rate; the method further includes: Delete the antenna configuration scheme in which the signal receiving sensitivity is less than the preset signal receiving sensitivity, the signal transmission rate is less than the preset signal transmission rate, the signal error vector is greater than the preset signal error vector, and the packet loss rate is greater than the preset packet loss rate.

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