Multi-connected air conditioning system and control method and device thereof

Abstract

The application provides a multi-connected air conditioning system and a control method and device thereof, which comprises an outdoor unit, an indoor unit group and a main system pipeline connecting the outdoor unit and the indoor unit group; the indoor unit group comprises a plurality of indoor units arranged in parallel in different indoor spaces, and each indoor unit is provided with a radar module; the main system pipeline comprises a same number of refrigerant transmission channels as the number of the indoor units in parallel; the outdoor unit is used for feeding back the proportion of the number of people in the corresponding indoor space in the total number of people in the space through each radar module, and controlling the main system pipeline to periodically and sequentially connect the plurality of refrigerant transmission channels according to a connection control strategy. The multi-connected air conditioning system and the control method and device thereof can adjust the refrigerant flow direction and flow of the multi-connected air conditioning system in real time according to the indoor individual distribution, adapt the heat exchange amount of each indoor space to the personnel distribution, optimize the control performance and user experience of the air conditioner, and save energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, in particular to a multi-connected air conditioning system and a control method and device thereof. BACKGROUND

[0002] The multi-connected air conditioner is also called a multi-split air conditioner, which has one outdoor unit and multiple indoor units, forms a refrigerant circulation system, and the multiple indoor units are arranged in different rooms and connected with the outdoor unit in parallel in the entire refrigerant circulation system. When the air conditioner is running for heating / cooling, the outdoor unit starts to run, and all or part of the indoor units start to run. The indoor units that start to run adjust the indoor air temperature by using the indoor heat exchanger to provide a comfortable environment for the indoor people.

[0003] The multi-connected air conditioner usually controls the compressor frequency, fan speed, etc. based on the indoor coil temperature as the temperature control target, so that the indoor temperature reaches or approaches the set temperature. In the prior art, the target indoor coil temperature is pre-set in the air conditioner memory before the air conditioner is shipped, and the pre-set value is directly called when the installed air conditioner is actually used.

[0004] After installation, the multi-connected air conditioner usually has different installation environments, installation methods, use environments, and use habits, while the pre-set target indoor coil temperature before shipment is fixed and cannot be changed. The fixed target temperature cannot adapt to various working conditions, resulting in a large difference between the target temperature and the actual air conditioner control, and it is difficult to quickly obtain the optimized control performance of the air conditioner. SUMMARY

[0005] The present application provides a multi-connected air conditioning system and a control method and device thereof to solve the defect that the multi-connected air conditioner in the prior art cannot adaptively adjust the refrigerant flow for different working conditions.

[0006] The present application provides a multi-connected air conditioning system, which comprises an outdoor unit, an indoor unit group, and a main system pipeline for communicating the outdoor unit and the indoor unit group;

[0007] The indoor unit group comprises multiple indoor units arranged in parallel in different indoor spaces, and each indoor unit is provided with a radar module;

[0008] The main system pipeline comprises a number of refrigerant transmission paths equal to the number of parallel indoor units;

[0009] The outdoor unit is configured to feed back the proportion of the number of people in the corresponding indoor space in the total number of people in the space through each radar module, and control the main system pipeline to periodically and sequentially connect the multiple refrigerant transmission paths according to a communication control strategy;

[0010] The communication control strategy comprises the connection order and connection time of the refrigerant transmission path.

[0011] According to the multi-connected air conditioning system provided by the application, the main system pipeline comprises a refrigerant reversing device;

[0012] The refrigerant reversing device is provided with a refrigerant input pipeline connected with the outdoor unit and refrigerant output pipelines connected with the indoor units in one-to-one correspondence in parallel;

[0013] The refrigerant reversing device is used for receiving and responding to the communication control strategy, setting the refrigerant input pipeline and the target refrigerant output pipeline in a communication state, and setting other refrigerant output pipelines except the target refrigerant output pipeline in a shutdown state, and providing a heat exchange amount to the target indoor unit through the target refrigerant transmission pipeline formed;

[0014] The target refrigerant output pipeline is any refrigerant output pipeline determined according to the communication order of the refrigerant transmission pipeline in the communication control strategy.

[0015] The application further provides a control method based on the multi-connected air conditioning system.

[0016] In a case where it is determined that at least one indoor unit receives a start instruction, the indoor unit group is controlled to be in standby;

[0017] The communication control strategy is determined by feeding back the proportion of the number of people in the corresponding indoor space in the total number of people in the space through each radar module, and the communication control strategy comprises a communication order and a communication duration of the refrigerant transmission pipeline.

[0018] After it is determined that the outdoor unit is started, the main system pipeline is controlled to periodically and sequentially communicate the plurality of refrigerant transmission pipelines according to the communication control strategy, and the corresponding indoor unit is controlled to change from the standby state to the start state.

[0019] According to the control method provided by the application, the main system pipeline is controlled to periodically and sequentially communicate the plurality of refrigerant transmission pipelines according to the communication control strategy, and the corresponding indoor unit is controlled to change from the standby state to the start state, comprising:

[0020] Based on the communication control strategy, the refrigerant input pipeline and the target refrigerant output pipeline are set in a communication state, and other refrigerant output pipelines except the target refrigerant output pipeline are set in a shutdown state, and a heat exchange amount is provided to the target indoor unit through the target refrigerant transmission pipeline formed;

[0021] In a case where it is determined that the target refrigerant transmission pipeline is in a communication state, the target indoor unit is controlled to start, and the running duration is synchronously adjusted to be the same as the communication duration of the target refrigerant transmission pipeline;

[0022] The target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection sequence of the refrigerant transmission paths in the connection control strategy.

[0023] According to the control method, the proportion of the indoor space number corresponding to each radar module in the total number of spaces is fed back, the connection control strategy is determined, and the connection control strategy includes the connection sequence and the connection duration of the refrigerant transmission paths.

[0024] In a case where it is determined that the proportion of the indoor space number corresponding to each radar module in the total number of spaces is not 0, the connection sequence of the refrigerant transmission paths is determined according to the size relationship between the indoor space numbers.

[0025] The connection duration of the target refrigerant transmission path is determined according to the proportion of the target indoor space number in the total number of spaces and a preset period.

[0026] According to the control method, the proportion of the indoor space number corresponding to each radar module in the total number of spaces is fed back, the connection control strategy is determined, and the connection control strategy includes the connection sequence and the connection duration of the refrigerant transmission paths.

[0027] In a case where it is determined that the proportion of the indoor space number corresponding to each radar module in the total number of spaces is not 0, the target refrigerant transmission path is kept in a connected state.

[0028] According to the control method, the proportion of the indoor space number corresponding to each radar module in the total number of spaces is fed back, the connection control strategy is determined, and the connection control strategy includes the connection sequence and the connection duration of the refrigerant transmission paths.

[0029] In a case where it is determined that the proportion of the indoor space number corresponding to each radar module in the total number of spaces is not 0, the target refrigerant transmission path is kept in a connected state.

[0030] The application further provides a control device of a multi-connected air conditioning system, which comprises:

[0031] The standby control module is configured to control the indoor unit group to be in standby in a case where it is determined that at least one indoor unit receives a start instruction.

[0032] The connection decision module is configured to determine a connection control strategy by feeding back the proportion of the indoor space number corresponding to each radar module in the total number of spaces, and the connection control strategy includes the connection sequence and the connection duration of the refrigerant transmission paths.

[0033] The start control module is configured to control the main system pipeline to periodically and sequentially connect the refrigerant transmission paths according to the connection control strategy, and control the corresponding indoor unit to change from a standby state to a start state after the outdoor unit is started.

[0034] The application further provides a non-transitory computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the control method of the multi-split air conditioning system.

[0035] The application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the control method of the multi-split air conditioning system.

[0036] The multi-split air conditioning system, the control method and the control device thereof provided by the application can adjust the connection order and the connection time length of the refrigerant transmission path involved by the connection control strategy matched with the individual distribution situation when the radar module arranged through the plurality of parallel indoor units detects the individual distribution situation of different indoor spaces. The refrigerant flow direction and flow rate of the multi-split air conditioning system can be adjusted in real time according to the individual distribution situation of the indoor space, the heat exchange amount of each indoor space can be matched with the personnel distribution situation, the diversity of the overall operation of the multi-split air conditioning system is improved, the control performance and user experience of the air conditioner are optimized, and the energy efficiency is saved. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0038] Figure 1 is one of the structural schematic diagrams of the multi-split air conditioning system provided by the application;

[0039] Figure 2 is one of the flow schematic diagrams of the control method of the multi-split air conditioning system provided by the application;

[0040] Figure 3 is the second structural schematic diagram of the multi-split air conditioning system provided by the application;

[0041] Figure 4 is the second flow schematic diagram of the control method of the multi-split air conditioning system provided by the application;

[0042] Figure 5 is the structural schematic diagram of the control device of the multi-split air conditioning system provided by the application. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0044] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more.

[0045] It should be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0046] The terms "include" and "contain" indicate the presence of the described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0047] Figure 1 is one of the structural schematic diagrams of the multi-split air conditioning system provided by the present application. As shown in Figure 1 The multi-split air conditioning system provided by the embodiment of the present application comprises an outdoor unit 110, an indoor unit group 120, and a main system pipeline 130 for communicating the outdoor unit 110 and the indoor unit group 120.

[0048] The indoor unit group 120 comprises a plurality of indoor units 121 connected in parallel or in series in different indoor spaces, and each indoor unit 121 is provided with a radar module 122.

[0049] The main system pipeline 130 comprises a plurality of refrigerant transmission channels equal to the number of indoor units connected in parallel.

[0050] The outdoor unit 110 is configured to feed back, through each radar module 122, the proportion of the number of people in the corresponding indoor space in the total number of people in the space, and control the main system pipeline 130 to periodically and sequentially connect the plurality of refrigerant transmission channels according to the communication control strategy.

[0051] The communication control strategy includes a communication sequence and a communication duration of the refrigerant transmission path.

[0052] The application scenario of the multi-connected air conditioning system is that the population density sensed by the radar module of each indoor space is used to control the main system pipeline to selectively connect the outdoor unit side or the indoor unit side, so as to adjust the refrigerant amount of the multi-connected air conditioning system under different demands.

[0053] Specifically, in the multi-connected air conditioning system, the outdoor unit 110 is connected to n indoor units 121 in the indoor unit group 120 through n refrigerant transmission paths in the main system pipeline 130, and the indoor units 121 are installed in different indoor spaces to adjust the indoor temperature.

[0054] Each indoor unit 121 is provided with a radar module 122, and when any indoor unit 121 receives an activation instruction sent by a user through a transmission medium, the indoor unit group 120 is first placed in a standby state, and the radar module 122 analyzes the electromagnetic waves reflected by the human body in the monitoring area, and the current positions of all individuals are counted to obtain the number of individuals in the indoor space where each indoor unit 121 is located.

[0055] The proportion of each group of indoor space population in the total population is used to analyze the individual distribution of the total space radiated by the multi-connected air conditioning system. Then, the k refrigerant transmission paths related to the individual distribution in the main system pipeline 130 are sequentially connected periodically according to the communication duration indicated by the communication control strategy. The refrigerant transmission path in any connected state can exchange heat according to the corresponding flow direction, so that the corresponding indoor unit adjusts the temperature of the indoor space where it is located in the working mode indicated by the activation instruction. Wherein:

[0056] When the air conditioning working mode is set to cooling, the refrigerant first becomes high-pressure gas in the compressor of the outdoor unit 110, then passes through the heat exchanger (which acts as a condenser at this time) of the outdoor unit 110 to condense and release heat to become high-pressure liquid, then the high-pressure liquid passes through the refrigerant transmission path to become low-temperature and low-pressure liquid, then passes through the heat exchanger (which acts as an evaporator at this time) of the indoor unit 120 to evaporate and absorb heat, and at the same time, the indoor air is cooled, so as to achieve the purpose of reducing the indoor temperature, and the low-temperature and low-pressure gas enters the compressor for the next refrigeration cycle.

[0057] When the air conditioner working mode is set to heating, the refrigerant first passes through the compressor in the outdoor unit 110 to become a high-pressure gas, and then passes through the heat exchanger of the indoor unit 120 (which functions as a condenser at this time) to condense and liquefy and release heat, becoming a liquid, while heating the indoor air, thereby achieving the purpose of increasing the indoor temperature. The liquid refrigerant is throttled and decompressed through the refrigerant transmission path and enters the heat exchanger of the outdoor unit (which functions as an evaporator at this time), evaporates and absorbs heat to become a gas, while absorbing the heat of the outdoor air, and the gaseous refrigerant enters the compressor again to start the next heating cycle.

[0058] wherein n is the total number of refrigerant transmission paths, and the value thereof should be greater than or equal to 2. k is the total number of refrigerant transmission paths that match the individual distribution situation (i.e. at least one individual exists in the corresponding indoor space), and k is less than or equal to n.

[0059] wherein the embodiments of the present application do not make specific limitations on the types and quantities of radar sensing devices in the radar module.

[0060] Exemplarily, the radar module can include a laser radar, an infrared sensor, etc.

[0061] Optionally, since the horizontal detection range of the millimeter wave radar can reach ±75°, the vertical detection range can reach ±40°, the detection can reach up to 8 meters, the distance output accuracy can reach 0.1 meters, the angle output accuracy can reach 1°, and it does not involve privacy issues, is not affected by light, and has a relatively fast response speed.

[0062] Therefore, the multi-split air conditioning system collects the individual position information in the indoor space where the corresponding indoor unit is located in real time according to the millimeter wave radar, to analyze the individual distribution situation in different indoor spaces.

[0063] Exemplarily, the radar module can include multiple types of sensing elements such as millimeter wave radars, laser radars, infrared sensors, etc., and the multi-split air conditioning system integrates the individual position information collected by each sensing element to comprehensively depict the individual distribution situation in different indoor spaces.

[0064] It can be understood that multiple indoor units in series can also exist in the same indoor space, and the multiple indoor units in series share one refrigerant transmission path to share the heat exchange amount.

[0065] The embodiment of the present application can adjust the refrigerant transmission path connection order and connection time according to the individual distribution situation of the indoor space, so as to adjust the refrigerant flow direction and flow rate of the multi-connected air conditioning system according to the individual distribution situation of the indoor space, adapt the heat exchange amount of each indoor space to the personnel distribution situation, improve the diversity of the overall operation of the multi-connected air conditioning system, optimize the control performance and user experience of the air conditioner, and save energy efficiency.

[0066] On the basis of any of the above embodiments, the main system pipeline 130 comprises a refrigerant reversing device.

[0067] The refrigerant reversing device is provided with a refrigerant input pipeline connected with the outdoor unit 110, and a refrigerant output pipeline connected with each of the parallel indoor units 121.

[0068] The refrigerant reversing device is used to receive and respond to the connection control strategy, set the refrigerant input pipeline and the target refrigerant output pipeline to a connected state, and set other refrigerant output pipelines except the target refrigerant output pipeline to an off state, so as to provide heat exchange amount to the target indoor unit through the formed target refrigerant transmission path.

[0069] Among them, the target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection order of the refrigerant transmission path in the connection control strategy.

[0070] Specifically, the main system pipeline 130 is connected with the outdoor unit 110 through the refrigerant reversing device composed of a refrigerant input pipeline and n refrigerant output pipelines corresponding to n indoor units 121, so as to form n refrigerant transmission paths between the outdoor unit 110 and the n indoor units 120.

[0071] The refrigerant reversing device is controlled by the connection control strategy issued by the outdoor unit 110, sets the refrigerant output pipelines involved in the connection control strategy to k target refrigerant output pipelines, sets the current corresponding target refrigerant output pipeline to a connected state in turn according to the connection order while keeping the refrigerant input pipeline connected, and sets the other n-1 refrigerant output pipelines to an off state, so as to provide heat exchange amount to the target indoor unit connected with the target refrigerant output pipeline through the formed target refrigerant transmission path.

[0072] The embodiment of the present application drives the refrigerant reversing device by the communication control strategy, controls the target refrigerant output pipeline involved in the communication control strategy in turn according to the communication sequence in the cycle, keeps the target refrigerant output pipeline connected for the corresponding communication duration, and provides the heat exchange amount to the indoor unit in the connecting chamber corresponding to the target refrigerant output pipeline through the target refrigerant transmission passage formed during the period. The multi-split air conditioning system realizes the periodic and alternating refrigeration or heating in different indoor spaces, and saves energy efficiency.

[0073] Figure 2 is one of the flowcharts of the control method of the multi-split air conditioning system provided by the present application. Based on the content of any of the above embodiments, as shown in Figure 2 The control method of the multi-split air conditioning system comprises the following steps: 201, in the case where it is determined that at least one indoor unit receives a start instruction, controlling the indoor unit group to be in standby.

[0074] It should be noted that the execution subject of the control method of the multi-split air conditioning system provided by the embodiment of the present application is the control device of the multi-split air conditioning system.

[0075] It should be noted that before step 201, the user needs to send an activation instruction through a transmission medium to activate the desired working mode of the air conditioner in the indoor space where the user is currently located.

[0076] Alternatively, the user can transmit the activation instruction by using the wireless communication mode between the control device and the air conditioning system through the control device, so as to initialize the working mode of the air conditioning system and start the radar module.

[0077] Alternatively, the user can issue the activation instruction in the form of voice interaction, and the air conditioning system receives the activation instruction, performs voice recognition, initializes the working mode, and starts the radar module.

[0078] Specifically, in step 201, the control device of the multi-split air conditioning system receives the activation instruction sent by the user through the transmission medium, and makes all indoor units in the indoor unit group be in standby state.

[0079] Step 202, determine the communication control strategy by feeding back the proportion of the number of people in the corresponding indoor space in the total number of people in each radar module. The communication control strategy includes the communication sequence and the communication duration of the refrigerant transmission passage.

[0080] Specifically, in step 202, after determining that all indoor units are in standby mode, the control device of the multi-split air conditioning system obtains the number of people in the indoor space perceived by each indoor unit through statistical analysis of the current positions of all individuals obtained by each radar module through calculation and analysis of the electromagnetic waves reflected by the human body in its monitoring area, and analyzes the individual distribution of the total space radiated by the multi-split air conditioning system according to the proportion of each group of indoor space people in the total number of people, and integrates the connection order and connection time of the refrigerant transmission path matched with the individual distribution of the total space into a connection control strategy, and sends it to the main system pipeline.

[0081] Step 203, after determining that the outdoor unit is started, the control main system pipeline is periodically connected in sequence according to the connection control strategy, and the corresponding indoor unit is controlled to change from standby state to start state.

[0082] Specifically, in step 203, after the control device of the multi-split air conditioning system starts the outdoor unit, the k refrigerant transmission paths related to the individual distribution in the main system pipeline are periodically connected in sequence according to the connection time indicated by the connection control strategy, so that the refrigerant can be exchanged according to the corresponding flow direction in any connected state, so that the corresponding indoor unit adjusts the temperature of the indoor space in which it is located in the working mode indicated by the activation instruction.

[0083] When the embodiment of the application detects the individual distribution of different indoor spaces through the radar module arranged in the plurality of parallel indoor units, the connection order and connection time of the refrigerant transmission path matched with the individual distribution are adjusted through the connection control strategy. The refrigerant flow direction and flow rate of the multi-split air conditioning system can be adjusted in real time according to the indoor individual distribution, so that the heat exchange amount of each indoor space is adapted to the personnel distribution, the diversity of the overall operation of the multi-split air conditioning system is improved, the control performance and user experience of the air conditioner are optimized, and the energy efficiency is also saved.

[0084] On the basis of any of the above embodiments, the control main system pipeline is periodically connected in sequence according to the connection control strategy, and the corresponding indoor unit is controlled to change from standby state to start state, including: based on the connection control strategy, the refrigerant input pipeline and the target refrigerant output pipeline are set to be connected, and all other refrigerant output pipelines except the target refrigerant output pipeline are set to be off, and the target indoor unit is provided with heat exchange amount through the target refrigerant transmission path.

[0085] Among them, the target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection order of each refrigerant transmission path in the connection control strategy.

[0086] Specifically, in step 203, the control device of the multi-split air conditioning system sets the refrigerant output pipeline involved in the communication control strategy as k target refrigerant output pipelines, and sets the current corresponding target refrigerant output pipeline as a communication state in turn according to the communication order while keeping the refrigerant input pipeline in communication, and sets the other n-1 refrigerant output pipelines as off states, so as to provide the target indoor unit connected to the target refrigerant output pipeline with a heat exchange amount through the formed target refrigerant transmission path.

[0087] In the case where it is determined that the target refrigerant transmission path is in a communication state, the target indoor unit is controlled to start, and the running duration is synchronously adjusted to be the same as the communication duration of the target refrigerant transmission path.

[0088] Specifically, when it is determined that the target refrigerant transmission path is currently in a communication state, the control device of the multi-split air conditioning system changes the target indoor unit connected to the target refrigerant transmission path from a standby state to a start state, and synchronously adjusts the running duration of the target indoor unit to be the same as the communication duration corresponding to the target refrigerant transmission path, so that the target indoor unit corresponding to the target refrigerant transmission path is synchronously operated when the target refrigerant transmission path transmits a heat exchange amount.

[0089] The embodiment of the present application drives the refrigerant reversing device to act through the communication control strategy, controls the target refrigerant output pipeline involved in the communication control strategy to keep communication for a corresponding communication duration in turn according to the communication order in a cycle, provides the target indoor unit corresponding to the target refrigerant output pipeline with a heat exchange amount through the formed target refrigerant transmission path during the period, and synchronously operates the target indoor unit. The multi-split air conditioning system realizes periodic and alternating refrigeration or heating in different indoor spaces, and saves energy efficiency.

[0090] On the basis of any of the above embodiments, the proportion of the number of people in each indoor space in the total number of people in the space is fed back by each radar module, and the communication control strategy is determined, including: in the case where it is determined that the proportion of the number of people in each indoor space in the total number of people in the space fed back by at least two radar modules is not 0, the communication order of the refrigerant transmission path is determined according to the size relationship between the numbers of people in multiple indoor spaces.

[0091] Specifically, in step 202, the control device of the multi-split air conditioning system compares the number of people in each indoor space fed back by each radar module with the sum of the numbers of people in all indoor spaces fed back by all radar modules to obtain the proportion of the number of people in each indoor space in the total number of people in the space, and analyzes the proportion.

[0092] If the proportion of the indoor space number fed back by at least two radar modules in the total space number is not 0, that is, there are at least two indoor partitions in which human individuals are distributed, the multiple groups of indoor space numbers with the proportion not 0 are sorted in descending order, and the indoor space numbers in the descending sequence are replaced by the serial numbers of the corresponding refrigerant transmission paths or the serial numbers of the refrigerant output pipelines to obtain the connection order of the k refrigerant transmission paths.

[0093] At this time, k is greater than or equal to 2.

[0094] According to the proportion of the target indoor space number in the total space number and the preset period, the connection duration of the target refrigerant transmission path is determined.

[0095] Specifically, the control device of the multi-split air conditioning system calculates the product of the proportion of any indoor space number in the total space number and a preset period of alternating work to obtain the connection duration of the target refrigerant transmission path in the period

[0096] In the embodiment of the application, when it is determined that the proportion of the indoor space number fed back by at least two radar modules in the total space number is not 0, the connection order of the refrigerant transmission path is determined according to the size relationship between the indoor space numbers corresponding to the indoor partitions in which human individuals are distributed, and the connection duration of the corresponding refrigerant transmission path in a complete working period is converted according to the proportion of each indoor space number in the total space number. The refrigerant transmission path can periodically and alternately refrigerate or heat in different indoor spaces, thereby saving energy efficiency.

[0097] On the basis of any of the above embodiments, the proportion of the indoor space number corresponding to each radar module in the total space number is determined to determine the connection control strategy, including: in the case where it is determined that only the proportion of the indoor space number corresponding to one radar module in the total space number is not 0, the target refrigerant transmission path is continuously kept in the connected state.

[0098] Specifically, in step 202, the control device of the multi-split air conditioning system calculates the proportion of each indoor space number in the total space number according to the indoor space number fed back by each radar module and the sum of the indoor space numbers fed back by all radar modules, and analyzes the proportion.

[0099] If only the proportion of the indoor space number fed back by one radar module in the total space number is not 0, that is, only one indoor partition in which human individuals are distributed exists in the multiple indoor partitions, only the refrigerant transmission path corresponding to the indoor space with the proportion not 0 is taken as the target refrigerant transmission path, and the target refrigerant transmission path is continuously kept in the connected state.

[0100] wherein k is 1 at this time.

[0101] The embodiment of the present application determines that the proportion of the indoor space number fed back by the radar module in the total number of spaces is not 0, and decides to continuously connect the refrigerant transmission path corresponding to the indoor partition where the human individual exists. The indoor unit where the individual exists continuously transmits the heat exchange amount, and can continuously cool or heat in the indoor space where the user exists, and cut off the operation of other indoor spaces, thereby saving energy efficiency.

[0102] On the basis of any of the above embodiments, the proportion of the indoor space number fed back by each radar module in the total number of spaces is determined to determine the connection control strategy, including: in the case where the proportion of the indoor space number fed back by all radar modules in the total number of spaces is 0, all refrigerant transmission paths are continuously kept in the off state, and the outdoor unit is closed.

[0103] Specifically, in step 202, the control device of the multi-split air conditioning system compares the indoor space number fed back by each radar module with the sum of the indoor space numbers fed back by all radar modules to obtain the proportion of the indoor space number in the total number of spaces, and analyzes it:

[0104] If the proportion of the indoor space number fed back by all radar modules in the total number of spaces is 0, that is, there is no human individual distribution in the indoor partitions, only all refrigerant transmission paths need to be continuously turned off until the radar module senses the change of the human individual distribution, and then the corresponding connection control strategy is formulated.

[0105] wherein k is 0 at this time.

[0106] Exemplarily, Figure 3 is a second structural schematic diagram of the multi-split air conditioning system provided by the present application. Figure 4 is a second flowchart of the control method of the multi-split air conditioning system provided by the present application. As Figure 3 and Figure 4 As shown in the figures, taking the total number n of indoor units in the indoor unit set as 2 as an example of one layout of the multi-split air conditioning system, an embodiment of the control method of the corresponding multi-split air conditioning system is given:

[0107] (1) When the multi-split air conditioning system is initialized, indoor units A and B are respectively put on standby, and the radars arranged on indoor units A and B are respectively driven to capture human targets in the indoor spaces where they are located.

[0108] (2) Through the feedback of the proportion of the corresponding indoor space number in the total number of spaces, the main system pipeline is connected according to the corresponding communication control strategy of any one of steps (3)-(6).

[0109] (3) If there is no one in room A and room B, that is, the proportion of the corresponding indoor space number in the total number of spaces is 0, the outdoor unit is not started, and all the refrigerant transmission paths are turned off.

[0110] (4) If there is someone in room A and no one in room B, that is, the proportion of the corresponding indoor space number in the total number of spaces is 1 in room A and 0 in room B, the refrigerant reversing device is controlled to only keep the refrigerant transmission path to indoor unit A in a connected state, and the outdoor unit and indoor unit A are started at the same time.

[0111] (5) If there is someone in room B and no one in room A, that is, the proportion of the corresponding indoor space number in the total number of spaces is 0 in room A and 1 in room B, the refrigerant reversing device is controlled to only keep the refrigerant transmission path to indoor unit B in a connected state, and the outdoor unit and indoor unit B are started at the same time.

[0112] (6) If there is someone in room A and room B, and the number of indoor space in room A is M and the number of indoor space in room B is N.

[0113] If M>N, the refrigerant reversing device is controlled to first connect the refrigerant transmission path corresponding to room A, turn off the refrigerant transmission path corresponding to room B, and set the running time of indoor unit A to 10M / (M+N) minutes. Then, the refrigerant reversing device is controlled to connect the refrigerant transmission path corresponding to room B, turn off the refrigerant transmission path corresponding to room A, and set the running time of indoor unit B to 10N / (M+N) minutes. Finally, take 10 minutes as a cycle to make room A and room B work alternately.

[0114] If M<N, the refrigerant reversing device is controlled to first connect the refrigerant transmission path corresponding to room B, turn off the refrigerant transmission path corresponding to room A, and set the running time of indoor unit A to 10N / (M+N) minutes. Then, the refrigerant reversing device is controlled to connect the refrigerant transmission path corresponding to room A, turn off the refrigerant transmission path corresponding to room B, and set the running time of indoor unit B to 10M / (M+N) minutes. Finally, take 10 minutes as a cycle to make room A and room B work alternately.

[0115] The embodiment of the present application determines that the proportion of the number of people in the indoor space fed back by all radar modules in the total number of people in the space is 0, and decides to continuously shut off the refrigerant transmission path corresponding to all indoor partitions. When there is no user in all indoor spaces, the refrigeration or heating is completely cut off, thereby saving energy efficiency.

[0116] Figure 5 is a structural schematic diagram of a control device of a multi-split air conditioning system provided by the present application. Based on any of the above embodiments, as shown in Figure 5 , the device includes a standby control module 510, a communication decision module 520, and a start control module 530, wherein:

[0117] The standby control module 510 is configured to control the indoor unit to be in standby mode when it is determined that at least one indoor unit receives a start instruction.

[0118] The communication decision module 520 is configured to determine a communication control strategy by the proportion of the number of people in the indoor space fed back by each radar module in the total number of people in the space. The communication control strategy includes the communication sequence and the communication duration of the refrigerant transmission path.

[0119] The start control module 530 is configured to control the main system pipeline to periodically and sequentially communicate the plurality of refrigerant transmission paths according to the communication control strategy after determining that the outdoor unit is started, and control the corresponding indoor unit to change from the standby state to the start state.

[0120] Specifically, the standby control module 510, the communication decision module 520, and the start control module 530 are sequentially electrically connected.

[0121] The standby control module 510 receives an activation instruction sent by a user through a transmission medium, and first makes all indoor units in the indoor unit group be in a standby state.

[0122] The communication decision module 520 determines that the indoor unit group is in standby mode, and through the calculation and analysis of the electromagnetic waves reflected by the human body in the monitoring area of each radar module, the current positions of all individuals are counted, the number of people in the indoor space perceived by each indoor unit is obtained, and the distribution of individuals in the total space radiated by the multi-split air conditioning system is analyzed according to the proportion of each group of indoor space number in the total number of people. The communication sequence and the communication duration of the refrigerant transmission path matched with the distribution of individuals in the total space are integrated into the communication control strategy, and are sent to the main system pipeline.

[0123] After the outdoor unit is started by the starting control module 530, the k refrigerant transmission paths related to the individual distribution in the main system pipeline are periodically and sequentially connected according to the connection time indicated by the connection control strategy. In any connection state, the refrigerant transmission path can make the refrigerant exchange heat according to the corresponding flow direction, so that the corresponding indoor unit adjusts the temperature of the indoor space where it is located in the working mode indicated by the activation instruction.

[0124] Optionally, the starting control module 530 comprises a refrigerant transmission unit and an indoor unit control unit, wherein:

[0125] The refrigerant transmission unit is configured to set the target refrigerant output pipeline and the refrigerant input pipeline to a connected state based on the connection control strategy, and set other refrigerant output pipelines to an off state, so as to provide a heat exchange amount to the target indoor unit through the target refrigerant transmission path.

[0126] The indoor unit control unit is configured to control the target indoor unit to start and adjust the running time to be the same as the connection time of the target refrigerant transmission path when it is determined that the target refrigerant transmission path is in a connected state.

[0127] The target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection order of each refrigerant transmission path in the connection control strategy.

[0128] Optionally, the connection decision module 520 comprises a connection order determination unit and a connection time determination unit, wherein:

[0129] The connection order determination unit is configured to determine the connection order of the refrigerant transmission path according to the size relationship between the indoor space population in multiple groups when it is determined that the proportion of the indoor space population in the total space population in the corresponding indoor space population of at least two radar modules is not 0.

[0130] The connection time determination unit is configured to determine the connection time of the target refrigerant transmission path according to the proportion of the target indoor space population in the total space population and the preset period.

[0131] Optionally, the connection decision module 520 comprises a single connection unit, wherein:

[0132] The single connection unit is configured to keep the target refrigerant transmission path in a connected state when it is determined that only one radar module feedbacks the proportion of the indoor space population in the total space population in the corresponding indoor space population is not 0.

[0133] Optionally, the connection decision module 520 comprises an all-off unit, wherein:

[0134] All the units are turned off, and the outdoor unit is turned off, when it is determined that the proportion of the number of people in each indoor space in the total number of people is 0.

[0135] The control device of the multi-connected air conditioning system provided by the embodiments of the present application is used to execute the control method of the multi-connected air conditioning system provided by the present application, and has the same beneficial effects as the control method of the multi-connected air conditioning system provided by the present application, which will not be described here.

[0136] When the individual distribution in different indoor spaces is detected by the radar modules arranged in the plurality of parallel indoor units, the embodiments of the present application adjust the connection order and connection time of the refrigerant transmission passages involved by the connection control strategy matched with the individual distribution. The refrigerant flow direction and flow rate of the multi-connected air conditioning system can be adjusted in real time according to the individual distribution in the indoor space, so that the heat exchange amount of each indoor space is adapted to the personnel distribution, the diversity of the overall operation of the multi-connected air conditioning system is improved, the control performance and user experience of the air conditioner are optimized, and the energy efficiency is also saved.

[0137] In another aspect, the present application also provides a computer program product, which comprises a computer program that can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to perform the control method of the multi-connected air conditioning system provided by the above-mentioned methods. The method comprises: controlling the indoor unit group to be in standby mode when it is determined that at least one indoor unit receives a start instruction; determining a connection control strategy by the proportion of the number of people in each indoor space in the total number of people fed back by each radar module; wherein the connection control strategy comprises the connection order and connection time of the refrigerant transmission passages. After it is determined that the outdoor unit is started, the main system pipeline is controlled to periodically and sequentially connect the plurality of refrigerant transmission passages according to the connection control strategy, and the corresponding indoor unit is controlled to change from the standby state to the start state.

[0138] In another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program that can be executed by a processor to perform the control method of the multi-connected air conditioning system provided by the above-mentioned methods. The method comprises: controlling the indoor unit group to be in standby mode when it is determined that at least one indoor unit receives a start instruction; determining a connection control strategy by the proportion of the number of people in each indoor space in the total number of people fed back by each radar module; wherein the connection control strategy comprises the connection order and connection time of the refrigerant transmission passages. After it is determined that the outdoor unit is started, the main system pipeline is controlled to periodically and sequentially connect the plurality of refrigerant transmission passages according to the connection control strategy, and the corresponding indoor unit is controlled to change from the standby state to the start state.

[0139] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0140] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, and the computer software products can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0141] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-split air conditioning system, characterized in that, The system comprises an outdoor unit, an indoor unit group, and a main system pipeline connecting the outdoor unit and the indoor unit group; The indoor unit group comprises a plurality of indoor units arranged in parallel in different indoor spaces, each indoor unit being provided with a radar module; The main system pipeline comprises a plurality of refrigerant transmission paths equal in number to the number of the indoor units arranged in parallel; The outdoor unit is configured to feed back, through each radar module, a proportion of a corresponding indoor space population in a total space population, and control the main system pipeline to periodically and sequentially connect the plurality of refrigerant transmission paths according to a connection control strategy; The connection control strategy comprises a connection sequence and a connection duration of the refrigerant transmission paths.

2. The multi-split air conditioning system according to claim 1, wherein, The main system pipeline comprises a refrigerant reversing device; The refrigerant reversing device is provided with a refrigerant input pipeline connected to the outdoor unit, and a plurality of refrigerant output pipelines connected to the indoor units arranged in parallel one by one; The refrigerant reversing device is configured to receive and respond to the connection control strategy, set the refrigerant input pipeline and a target refrigerant output pipeline in a connected state, and set other refrigerant output pipelines except the target refrigerant output pipeline in a shut-off state, so as to provide a target indoor unit with a heat exchange amount through a target refrigerant transmission path formed thereby; The target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection sequence of the refrigerant transmission paths in the connection control strategy.

3. A control method of a multi VRF air conditioning system according to claim 1 or 2, characterized by, The method comprises: In a case where it is determined that at least one indoor unit receives a start instruction, controlling the indoor unit group to be in a standby state; Determining a connection control strategy by feeding back, through each radar module, a proportion of a corresponding indoor space population in a total space population; wherein the connection control strategy comprises a connection sequence and a connection duration of the refrigerant transmission paths; In a case where it is determined that the outdoor unit is started, controlling the main system pipeline to periodically and sequentially connect the plurality of refrigerant transmission paths according to the connection control strategy, and controlling the corresponding indoor unit to change from the standby state to a start state.

4. The control method according to claim 3, characterized by The controlling the main system pipeline to periodically and sequentially connect the plurality of refrigerant transmission paths according to the connection control strategy, and controlling the corresponding indoor unit to change from the standby state to the start state, comprises: Setting the refrigerant input pipeline and a target refrigerant output pipeline in a connected state based on the connection control strategy, and setting other refrigerant output pipelines except the target refrigerant output pipeline in a shut-off state, so as to provide a target indoor unit with a heat exchange amount through a target refrigerant transmission path formed thereby; In a case where it is determined that the target refrigerant transmission path is in the connected state, controlling the target indoor unit to start, and synchronously adjusting a running duration to be the same as a connection duration of the target refrigerant transmission path; The target refrigerant output pipeline is any refrigerant output pipeline determined according to the connection sequence of the refrigerant transmission paths in the connection control strategy.

5. The control method according to claim 4, characterized by The determining the connection control strategy by feeding back, through each radar module, a proportion of a corresponding indoor space population in a total space population, comprises: In a case where it is determined that the proportion of the number of people in the indoor space corresponding to each radar module in the total number of people in the space is not 0, a connection order of the refrigerant transmission passages is determined according to the size relationship between the numbers of people in the indoor spaces. A connection duration of the target refrigerant transmission passage is determined according to the proportion of the number of people in the target indoor space in the total number of people in the space and a preset period.

6. The control method according to claim 4, characterized by The connection control strategy is determined according to the proportion of the number of people in the indoor space corresponding to each radar module in the total number of people in the space, and includes: In a case where it is determined that the proportion of the number of people in the indoor space corresponding to only one radar module in the total number of people in the space is not 0, the target refrigerant transmission passage is kept in a connected state.

7. The control method according to claim 4, characterized by, The connection control strategy is determined according to the proportion of the number of people in the indoor space corresponding to each radar module in the total number of people in the space, and includes: In a case where it is determined that the proportion of the number of people in the indoor space corresponding to all radar modules in the total number of people in the space is 0, all refrigerant transmission passages are kept in an off state, and the outdoor unit is turned off.

8. A control device of a multi-split air conditioning system, characterized in that, The control method comprises the following steps: In a case where it is determined that at least one indoor unit receives a start instruction, the standby control module controls the indoor unit group to be in a standby state; The connection control strategy is determined according to the proportion of the number of people in the indoor space corresponding to each radar module in the total number of people in the space, and includes a connection order of the refrigerant transmission passages and a connection duration. After the outdoor unit is started, the start control module controls the main system pipeline to periodically and sequentially connect the multiple refrigerant transmission passages according to the connection control strategy, and controls the corresponding indoor unit to change from a standby state to a start state. 9.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to implement the control method of the multi-split air conditioning system according to any one of claims 3 to 7.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor to implement the control method of the multi-split air conditioning system according to any one of claims 3 to 7.

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