Air conditioning system

Abstract

An air conditioning system includes an indoor unit, a cut-off device, and a configuration module including: a generation portion configured to perform a leakage amount safety check based on an assumed leakage amount to generate an initial scheme; the checking part is configured to perform working condition safety checking on the initial scheme based on the simulated working condition and verify whether the air-conditioning room at the downstream of the cut-off device in the initial scheme is in a safe state or not; the merging part is configured to generate a merging scheme by merging the cut-off devices in the initial scheme when the air-conditioned room at the downstream of the cut-off devices is in a safe state; the output part is configured to perform working condition safety checking on the merging scheme based on the simulated working condition; and when any air-conditioned room at the downstream of the cut-off device is not in the safe state any more, the previous merging scheme is output as the configuration scheme. According to the method, the configuration scheme determines the number of required cut-off devices and interlocking logic according to system requirements and safety redundancy consideration, and rationality and safety of the system are improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and more particularly to an air conditioning system. Background Technology

[0002] To collaboratively address ozone layer depletion and climate change, the Kigali Amendment to the Montreal Protocol regulates 18 HFCs with strong greenhouse effects. Simultaneously, the latest version of the international standard IEC 60335-2-40 has relaxed restrictions on the charge limits for flammable refrigerants. To achieve reduction targets, low-GWP refrigerants such as R32 and R454B have begun to be used in multi-split air conditioning systems. However, low-GWP refrigerants often possess a degree of flammability. Leaks, especially on the indoor side, can pose safety hazards.

[0003] Existing technologies typically incorporate refrigerant concentration sensors to detect refrigerant leaks. When the detected concentration exceeds a safety threshold, multiple safety measures are implemented, such as alarm activation, shut-off, and ventilation. However, existing technologies often include a shut-off device for each indoor unit, which further increases the installation space required for multi-split systems, significantly raising both equipment and construction costs.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] This application aims to optimize the configuration of the shut-off device while ensuring safety, thereby significantly reducing the installation space, equipment cost, and construction cost of multi-split air conditioners.

[0006] One or more embodiments of this application provide an air conditioning system.

[0007] In one or more embodiments of this application, an air conditioning system includes an indoor unit and a shut-off device, wherein the indoor unit is installed in an air-conditioned room and the shut-off device is used to cut off the refrigerant supply to the indoor unit.

[0008] In one or more embodiments of this application, the air conditioning system further includes a configuration module for generating a configuration scheme for the cut-off device, which includes a generation unit, a verification unit, a merging unit, and an output unit.

[0009] In one or more embodiments of this application, the generation unit is configured to perform a leakage safety check based on the assumed leakage amount, and generate an initial scheme for configuring the cut-off device based on the result of the leakage safety check.

[0010] In one or more embodiments of this application, the verification unit is configured to perform a working condition safety verification on the initial scheme based on simulated working conditions. When performing the working condition safety verification, it verifies whether the air-conditioned room downstream of the cut-off device is in a safe state in the initial scheme.

[0011] In one or more embodiments of this application, the merging unit is configured to merge at least two cutting-off devices in the initial scheme to generate a merging scheme when the air-conditioned room downstream of the cutting-off device is in a safe state.

[0012] In one or more embodiments of this application, the output unit is configured to perform a safety check on the merging scheme based on simulated operating conditions; when any air-conditioned room downstream of the cut-off device is no longer in a safe state, the previous merging scheme is output as the configuration scheme.

[0013] In one or more embodiments of this application, the generation unit is configured to perform a leakage safety check based on the assumed leakage amount as a first safety check.

[0014] In one or more embodiments of this application, the generation unit performs a leakage safety check based on the assumed leakage amount, including:

[0015] Assume that refrigerant leaks into one of the air-conditioned rooms to generate the assumed leak amount;

[0016] Obtain the volume parameters of the air-conditioned room;

[0017] Calculate the assumed leakage concentration in the air-conditioned room based on the assumed leakage amount and the volume parameters;

[0018] When the assumed leakage concentration is higher than the safe concentration threshold, the initial scheme includes configuring a cut-off device for the air-conditioned room.

[0019] In one or more embodiments of this application, the verification unit is configured to perform a working condition safety verification based on simulated working conditions as a second safety verification.

[0020] In one or more embodiments of this application, the verification unit performs a condition safety verification of the initial scheme based on simulated operating conditions, including:

[0021] Obtain the cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device;

[0022] The refrigerant leakage rate of the indoor unit under simulated operating conditions is calculated based on the aforementioned refrigeration parameters.

[0023] Obtain the effective volume of the air-conditioned room that meets the boundary volume conditions;

[0024] The leakage concentration under simulated operating conditions is calculated based on the refrigerant's leakable amount and effective volume.

[0025] When the leakage concentration under the simulated operating condition is lower than the preset concentration threshold, the air-conditioned room downstream of the cut-off device is in a safe state.

[0026] To improve system safety, if, in the initial verification, at least one air-conditioned room downstream of the cut-off device is not in a safe state, the verification unit is configured to: call the calibration indoor unit cooling parameters; correct the obtained cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device using the calibration indoor unit cooling parameters, and perform the operating condition safety verification again until the air-conditioned room downstream of the cut-off device is in a safe state.

[0027] In one or more embodiments of this application, the capacity corresponding to the cooling parameters of the indoor unit is lower than the capacity corresponding to the cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device.

[0028] In one or more embodiments of this application, if the verification unit cannot obtain a verification result that the air-conditioned room downstream of the cut-off device is in a safe state, the output unit prohibits the output of the configuration scheme.

[0029] In one or more embodiments of this application, the merging unit is configured to merge at least two cutting devices in the initial scheme from downstream to upstream to generate a merging scheme when the air-conditioned room downstream of the cutting device is in a safe state.

[0030] In one or more embodiments of this application, the merging unit is configured to merge at least two cutting-off devices in the initial scheme when the air-conditioned room downstream of the cutting-off device is in a safe state, and to estimate whether the capacity of the indoor unit downstream of the merged cutting-off device is lower than the system performance capacity threshold; if it is lower than the system performance capacity threshold, then the merging scheme is generated.

[0031] In one or more embodiments of this application, the indoor unit includes: a detection device; the detection device is used to detect the refrigerant concentration in the air-conditioned room.

[0032] In one or more embodiments of this application, the indoor unit includes: an alarm device; the alarm device is used to generate an alarm signal when the refrigerant concentration in the air-conditioned room is higher than a warning concentration threshold.

[0033] In one or more embodiments of this application, the refrigeration parameters for calculating the refrigerant leakage amount of the indoor unit under simulated operating conditions include the leakage detection alarm time of the alarm device; the shut-off time of the shut-off device; the refrigerant leakage amount in the online piping; and / or the refrigerant leakage amount of the indoor heat exchanger in the indoor unit.

[0034] In one or more embodiments of this application, the safe concentration threshold is generated based on the lower limit of combustible concentration and the volume parameters of the air-conditioned room.

[0035] Compared with the prior art, the advantages and positive effects of the present invention are:

[0036] The air conditioning system provided in this application outputs a configuration scheme for the shut-off device through a configuration module. The configuration scheme determines the required number of shut-off devices and interlocking logic based on system requirements and safety redundancy considerations. At the same time, it can ensure that the refrigerant supply to the indoor unit can be cut off in a timely manner in case of abnormal conditions to prevent accidents.

[0037] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0040] Figure 2 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0041] Figure 3 A schematic block diagram of the configuration module provided in one or more embodiments of the present invention;

[0042] Figure 4 A schematic block diagram of the configuration module provided in one or more embodiments of the present invention;

[0043] Figure 5 A schematic diagram of the structure of an indoor unit in an air conditioning system provided by one or more embodiments of the present invention;

[0044] Figure 6 A flowchart of a configuration module in an air conditioning system provided for one or more embodiments of the present invention;

[0045] Figure 7 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0046] Figure 8A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0047] Figure 9 A flowchart of a configuration module provided for one or more embodiments of the present invention;

[0048] Figure 10 A flowchart of a configuration module provided for one or more embodiments of the present invention;

[0049] Figure 11 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0050] Figure 12 A flowchart of a configuration module provided for one or more embodiments of the present invention;

[0051] Figure 13 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0052] Figure 14 A schematic diagram of the structure of an air conditioning system provided for one or more embodiments of the present invention;

[0053] Figure 15 A flowchart of a configuration module provided for one or more embodiments of the present invention;

[0054] In the picture:

[0055] 10. Air conditioning system; 1A. Air-conditioned room; 1B. Air-conditioned room; 1C. Air-conditioned room; 1D. Air-conditioned room; 1E. Air-conditioned room;

[0056] 100. Outdoor unit; 101. Compressor; 102. Outdoor heat exchanger; 103. Outdoor electronic expansion valve; 104. Outdoor fan; 105. Four-way valve; 106. Gas-liquid separator; 107. Oil separator; 108. Capillary tube; 109. Outdoor control circuit

[0057] 200. Indoor unit; 201. Indoor heat exchanger; 202. Indoor fan; 203. Indoor control circuit; 204. Housing; 205. Air outlet; 206. Detection device; 207. Alarm device; 208. Indoor electronic expansion valve;

[0058] 200-1, Indoor Unit; 200-2, Indoor Unit; 200-3, Indoor Unit; 200-4, Indoor Unit; 200-5, Indoor Unit; 200-6, Indoor Unit;

[0059] 300. Gas-side connection piping;

[0060] 400. Liquid-side inline piping;

[0061] 500. Cut-off device; 51. Cut-off device; 52. Cut-off device; 53. Cut-off device; 54. Cut-off device; 55. Cut-off device; 511. Cut-off device; 512. Cut-off device; 513. Cut-off device; 514. Cut-off device; 522. Cut-off device; 534. Cut-off device;

[0062] 600. Configuration module; 601. Processor; 602. Storage unit; 603. Input / output interface; 604. Communication interface; 611. Generation unit; 612. Verification unit; 613. Merging unit; 614. Output unit;

[0063] 700, Server;

[0064] 800, Terminal. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0067] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0070] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0071] Hereinafter, embodiments of the air conditioning system 10 provided in this application will be described based on the accompanying drawings.

[0072] Figure 1 An example of using the air conditioning system 10 provided in this application is shown.

[0073] The air conditioning system 10 is a system that performs a refrigeration cycle by using a compressor 101, a condenser, a throttling device, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0074] The refrigerant is a flammable refrigerant, such as R32 and R454B.

[0075] From a principle perspective, low-temperature, low-pressure refrigerant enters compressor 101, where it is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0076] The throttling device expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the throttling device and returns the low-temperature, low-pressure refrigerant gas to the compressor 101. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioning system 10 regulates the temperature of the indoor space.

[0077] The outdoor unit 100 of the air conditioning system 10 refers to the part of the refrigeration cycle that includes the compressor 101 and the outdoor heat exchanger 102. The indoor unit 200 of the air conditioning system 10 is placed in the air-conditioned room and includes the indoor heat exchanger 201. Throttling devices can be provided in both the indoor unit 200 and the outdoor unit 100. For example, in this embodiment, each indoor unit 200 is equipped with an expansion valve, called an indoor electronic expansion valve 208, and the outdoor unit 100 may be equipped with an outdoor electronic expansion valve 103.

[0078] Indoor heat exchanger 201 and outdoor heat exchanger 102 are used as condensers or evaporators. When indoor heat exchanger 201 is used as a condenser, air conditioning system 10 is used as a heater in heating mode, and when indoor heat exchanger 201 is used as an evaporator, air conditioning system 10 is used as a cooler in cooling mode.

[0079] In one or more embodiments of this application, each outdoor unit 100 may be equipped with one or more compressors 101, and AC power is supplied to the compressors 101 in operation through a frequency converter. When the output frequency of the frequency converter changes, the speed of the compressors 101 changes, thereby achieving different air conditioning capacities.

[0080] The outdoor unit 100 also includes an outdoor fan 104 and a four-way valve 105. Other conventional components such as a gas-liquid separator 106, a capillary tube 108, and an oil separator 107 may also be included. The gas-liquid separator 106 is a shell-shaped component used to separate the refrigerant into gas and liquid phases, typically located on the suction side of the compressor 101. The outdoor heat exchanger 102 is configured to exchange heat between the refrigerant flowing through its internal heat exchange pipes and the air (or other medium) guided by the outdoor fan 104. The outdoor fan 104 can be an axial fan, a cross-flow fan, or other optional fan type, and is typically located near the outdoor heat exchanger 102. The four-way valve 105 is a valve that switches the refrigerant flow direction according to the operating mode of the air conditioning system 10. In cooling mode, the discharge side of the compressor 101 is connected to one end of the outdoor heat exchanger 102 via the four-way valve 105 and other piping, while the suction side of the compressor 101 is connected to one end of the indoor heat exchanger 201 via the four-way valve 105 and other piping. Thus, the outdoor heat exchanger 102 functions as a condenser, and the indoor heat exchanger 201 functions as an evaporator. Similarly, in heating mode, the discharge side of the compressor 101 is connected to one end of the indoor heat exchanger 201 via the four-way valve 105 and piping, while the suction side of the compressor 101 is connected to one side of the outdoor heat exchanger 102 via the four-way valve 105 and other piping. Thus, the indoor heat exchanger 201 functions as a condenser, and the outdoor heat exchanger 102 functions as an evaporator. The refrigerant circuit of the air conditioning system 10 is connected in sequence to the compressor 101, the outdoor heat exchanger 102, the expansion valve and the indoor heat exchanger 201 to circulate the refrigerant.

[0081] The indoor electronic expansion valve 208 and the outdoor electronic expansion valve 103, which are installed corresponding to the indoor unit 200, are valves that reduce the pressure of the refrigerant flowing into the valve body itself. They are installed on the piping through which the liquid refrigerant or the gas-liquid two-phase refrigerant flows.

[0082] Oil separator 107 is used to separate lubricating oil from the refrigerant discharged from compressor 101. It is usually installed on the discharge side of compressor 101. The lubricating oil separated by oil separator 107 can be guided to gas-liquid separator 106 through pipeline. A one-way valve can also be installed to guide the separated refrigerant to four-way valve 105.

[0083] The outdoor unit 100 includes an outdoor control circuit 109. The outdoor control circuit 109 is typically housed in a well-sealed electrical box. The outdoor control circuit 109 includes components such as a processor, a storage unit, input / output interfaces, and a communication interface. The processor can be a dedicated processor, a central processing unit (CPU), etc. The processor can access the storage unit to execute instructions or application programs stored therein to perform related functions. The storage unit may include volatile memory and / or non-volatile memory. The input / output interfaces can communicate with various sensors installed in the outdoor unit 100 to receive their detection values. These sensors include, but are not limited to, an outdoor temperature sensor, a temperature sensor on the suction side of the compressor 101, a temperature sensor on the discharge side, and a pressure sensor on the discharge side. The input / output interfaces can communicate with devices such as a frequency converter module, compressor 101, outdoor fan 104, four-way valve 105, and outdoor electronic expansion valve 103 to output control commands generated by the processor. The communication interface can support different wireless communication protocols, such as WiFi, Bluetooth, near field communication, NB-IoT, etc., to communicate and connect with other electronic devices, including but not limited to cloud server 700, computer (host computer), smartphone, tablet computer, PDA, intelligent control tooling, wearable device and vehicle equipment, etc.

[0084] In one or more embodiments of this application, the air conditioning system 10 may include multiple outdoor units 100. Each outdoor unit 100 may operate independently or may be configured to operate in groups, such as two outdoor units 100 as a group, four outdoor units 100 as a group, and so on.

[0085] In one or more embodiments of this application, each or each group of outdoor units 100 is equipped with a corresponding indoor unit 200, forming a combined working mode of one indoor unit 200 and multiple indoor units 200.

[0086] In one or more embodiments of this application, the indoor unit 200 may employ an independent air supply structure, such as a wall-mounted air supply structure, a floor-standing air supply structure, a ducted air supply structure, or an air supply structure embedded in the ceiling, etc. The air supply structure includes a housing 204, which has a return air inlet for drawing in air and an air outlet 205 for delivering heat-exchanged air into the air-conditioned room. An indoor fan 202 and an indoor heat exchanger 201 are disposed within the housing 204. The indoor fan 202 is located near the indoor heat exchanger 201.

[0087] In one or more embodiments of this application, the indoor unit 200 is matched with a wired controller, which is fixedly installed on the wall of the air-conditioned room. The wired controller is provided with an operation interface for inputting the set temperature and operating mode, as well as a display interface for displaying the real-time temperature of the air-conditioned room and the operating status of the air conditioning system 10.

[0088] In one or more embodiments of this application, the indoor unit 200 is matched with a remote control, which is communicatively connected to the indoor unit 200. The remote control is provided with buttons for inputting the set temperature and operating mode, as well as a display interface for displaying the real-time temperature of the air-conditioned room and the operating status of the air conditioning system 10.

[0089] In one or more embodiments of this application, an indoor unit 200 is matched with a corresponding mobile control terminal. The mobile control terminal is communicatively connected to the indoor unit 200. The mobile control terminal has an application interface, through which the set temperature and operating mode can be input and the real-time temperature or operating status of the air-conditioned room can be displayed.

[0090] In one or more embodiments of this application, the mobile control terminal may be a computer, tablet computer, smartphone, wearable device, etc.

[0091] The indoor unit 200 is equipped with an indoor control circuit 203, which preferably includes an indoor controller. The indoor controller is configured to drive the indoor fan 202, display various parameters on the display panel, provide human-machine interaction, receive and process sampling signals from various sensors, and perform necessary communication functions.

[0092] The indoor control circuit 203 also includes electrical components such as a storage unit, processor, input / output interface, and communication interface.

[0093] The storage unit may include volatile memory and / or non-volatile memory. The storage unit is configured to store instructions or data associated with at least one component of the indoor unit 200, such as an application. For example, the application could be used to adjust the temperature of an air-conditioned room by adjusting different fan speeds.

[0094] An indoor processor can be a dedicated processor, a central processing unit (CPU), or the like. The indoor processor can access memory to execute instructions stored in the memory to perform related functions.

[0095] The input / output interface can communicate with various sensors installed in the indoor unit 200 to receive their detection values. These sensors include, but are not limited to, an air temperature sensor installed at the return air vent, a humidity sensor installed at the return air vent, an air temperature sensor installed at the supply air vent 205, a refrigerant temperature sensor installed at the inlet of the indoor heat exchanger 201, and a refrigerant temperature sensor installed at the outlet of the indoor heat exchanger 201, etc. The input / output interface can be a serial communication interface. The input / output interface can also communicate with components such as indicator lights, buzzers, and stepper motors to output control commands. The stepper motor can be the driving component of the air guide plate.

[0096] The communication interface can be a software interface that supports different wireless communication protocols, such as WiFi and Bluetooth.

[0097] The indoor control circuit 203 is usually equipped with a power supply circuit to provide 12V and 5V voltage.

[0098] The outdoor unit 100 control circuit and the indoor control circuit 203 are communicatively connected. In some optional embodiments of this application, the outdoor unit 100 control circuit and the indoor control circuit 203 together serve as a control unit to perform control of the air conditioning system 10.

[0099] Taking one outdoor unit 100 and multiple indoor units 200 as an example, the multiple indoor units 200 are connected to the outdoor unit 100 through liquid-side connection piping 400 and gas-side connection piping 300 respectively.

[0100] To automatically cut off the refrigerant supply to the indoor unit 200 in the event of a refrigerant leak or other hazardous situation, a shut-off device 500 is also included. The actuating part of the shut-off device 500 mainly includes a solenoid valve, which cuts off the refrigerant supply to the indoor unit 200 to prevent dangerous situations such as fire or poisoning.

[0101] like Figure 2 As shown, in one or more embodiments of this application, the air conditioning system 10 further includes a configuration module 600. The configuration module 600 is used to generate a configuration scheme for the cut-off device.

[0102] In one or more embodiments of this application, the generated configuration scheme is set to correspond to one outdoor unit 100, and the outdoor unit 100 is fluidly connected to multiple indoor units 200.

[0103] In one or more embodiments of this application, the generated configuration scheme is set to correspond to a group of outdoor units 100, and the group of outdoor units 100 is fluidly connected to multiple indoor units 200.

[0104] In one or more embodiments of this application, the generated configuration scheme includes the number of required shut-off devices determined according to system requirements and safety redundancy considerations, including the interlocking logic of the shut-off devices, to ensure that the refrigerant supply to the indoor unit 200 can be cut off in a timely manner in the event of an abnormal situation, so as to prevent accidents from occurring.

[0105] like Figure 3 As shown, the configuration module 600 includes components such as a processor 601, a storage unit 602, an input / output interface 603, and a communication interface 604. The processor 601 is implemented by an MCU, and the configuration module 600 can be a system-on-a-chip.

[0106] In one or more embodiments of this application, the configuration module 600 may be implemented by a centralized controller.

[0107] In one or more embodiments of this application, the configuration module 600 may be implemented by a server.

[0108] In one or more embodiments of this application, the configuration module 600 may be implemented by a cloud platform.

[0109] In one or more embodiments of this application, the configuration module 600 may be implemented by a handheld terminal 800 used by an operator.

[0110] In one or more embodiments of this application, some functions of the configuration module 600 can be implemented by a combination of one or more of a central controller, server 700, cloud platform, or handheld terminal 800, while other functions can be implemented by the outdoor unit 100 control circuit and / or indoor control circuit 203, such as... Figure 2 As shown.

[0111] like Figure 4 As shown, in one or more embodiments of this application, the configuration module 600 includes a generation unit 611, a verification unit 612, a merging unit 613, and an output unit 614. Each of these components can be implemented by a processor running a program.

[0112] In one or more embodiments of this application, the generation unit 611 is configured to perform a leakage safety check based on an assumed leakage amount. The generation unit 611 generates an initial scheme for configuring the cut-off device based on the result of the leakage safety check.

[0113] In one or more embodiments of this application, performing a leakage safety check based on the assumed leakage amount involves assuming possible leakage scenarios based on the system's design and operating conditions, estimating the possible leakage amount based on the assumed leakage scenarios, and assessing the potential risk of the assumed leakage amount to the indoor environment of the air-conditioned room.

[0114] In one or more embodiments of this application, the verification unit 612 is configured to perform a safety verification of the initial scheme based on simulated operating conditions. When performing the safety verification, the verification unit 612 verifies whether the air-conditioned room downstream of the cut-off device is in a safe state in the initial scheme.

[0115] In one or more embodiments of this application, when performing operational safety verification on the initial scheme based on simulated operating conditions, the safety and reliability of the initial scheme are verified and checked by simulating actual operating conditions (operating conditions), aiming to ensure that the air-conditioned rooms downstream of the cut-off device are in a safe state under specific operating conditions.

[0116] In one or more embodiments of this application, the merging unit 613 is configured to generate a merging scheme from at least two cutting-off devices in the initial merging scheme when the air-conditioned room downstream of the cutting-off device is in a safe state.

[0117] The merging unit 613 is configured to identify any redundant cut-off devices that may exist in the initial scheme, and merge at least two cut-off devices to reduce redundancy, while ensuring the safety and reliability of the air conditioning system 10, provided that safety is ensured.

[0118] In one or more embodiments of this application, the output unit 614 is configured to perform a safety check on the merging scheme based on simulated operating conditions, and output the previous merging scheme as the configuration scheme when any air-conditioned room downstream of the cut-off device is no longer in a safe state.

[0119] The configuration plan can be displayed on the screen to guide operators in installing the corresponding number of cut-off devices in the corresponding locations, reducing redundancy and achieving the ideal configuration state while ensuring the safety of each air-conditioned room.

[0120] like Figure 5 As shown, in one or more embodiments of this application, the indoor unit 200 includes a detection device 206. The detection device 206 is used to detect the refrigerant concentration in the air-conditioned room.

[0121] In one or more embodiments of this application, the indoor unit 200 includes an alarm device 207. The alarm device 207 is used to generate an alarm signal when the refrigerant concentration in the air-conditioned room is higher than a warning concentration.

[0122] In one or more embodiments of this application, the generation unit 611 performs a leakage safety check based on the assumed leakage amount, including as follows: Figure 6 The steps are shown.

[0123] Step S101: Assume that refrigerant has leaked into one of the air-conditioned rooms to generate a hypothetical leak amount.

[0124] In one or more embodiments of this application, it is assumed that all the refrigerant in a refrigeration unit (comprising an outdoor unit 100 and multiple indoor units 200) leaks into one of the air-conditioned rooms to generate the maximum assumed leakage amount.

[0125] Step S102: Obtain the volume parameters of the air-conditioned room.

[0126] In one or more embodiments of this application, the volume parameters include the volume of the air-conditioned room, or the length, width and height of the air-conditioned room.

[0127] In one or more embodiments of this application, the volume parameters also include the number of ventilation openings (e.g., windows and doors) in the air-conditioned room.

[0128] Step S103: Calculate the assumed leakage concentration in the air-conditioned room based on the assumed leakage amount and volume parameters.

[0129] In one or more embodiments of this application:

[0130] Assuming a leakage concentration C in the air-conditioned room h It can be represented as: C h =M h V h ; where M h Assuming leakage amount, V h This refers to the volume of the air-conditioned room.

[0131] In one or more embodiments of this application, the number of vents (e.g., windows and doors) in an air-conditioned room can be used to estimate the assumed leakage concentration C. h To make corrections, for example, the more vents there are, assuming a leakage concentration C... h The smaller.

[0132] Step S104: Assume whether the leakage concentration is higher than the safe concentration threshold.

[0133] Step S105: Assuming the leakage concentration is higher than the safe concentration threshold, a cutoff device is configured for the air-conditioned room in the initial scheme.

[0134] Step S106: Assuming the leakage concentration is below the safe concentration threshold, the initial scheme does not include a shut-off device for the air-conditioned room.

[0135] In one or more embodiments of this application, the safe concentration threshold is generated based on the lower flammable limit (LFL). For example, it is the product of the lower flammable limit and a safety factor, where the safety factor is a constant less than or equal to 1.

[0136] In one or more embodiments of this application, the safe concentration threshold is generated based on the lower flammable limit (LFL) and the volume parameters of the air-conditioned room.

[0137] In one or more embodiments of this application, the safety factor is generated based on the height of the air-conditioned room; the higher the height of the air-conditioned room, the greater the safety factor. For example, if the height of the air-conditioned room is higher than 1.8 meters, the safety factor is 0.75, that is, the safe concentration threshold is 0.75 LFL; while if the height of the air-conditioned room is between 1.5 meters and 1.8 meters, the safety factor is 0.5, that is, the safe concentration threshold is 0.5 LFL.

[0138] In one or more embodiments of this application, such as Figure 7 As shown, the air conditioning system 10 includes one outdoor unit 100 and six indoor units, as shown in 200-1 to 200-6. The six indoor units 200-1 to 200-6 are installed in five air-conditioned rooms: indoor units 200-1 and 200-2 are installed in air-conditioned room 1A, indoor unit 200-3 is installed in air-conditioned room 1B, indoor unit 200-4 is installed in air-conditioned room 1C, indoor unit 200-5 is installed in air-conditioned room 1D, and indoor unit 200-6 is installed in air-conditioned room 1E. Air-conditioned room 1A is larger in volume, while air-conditioned rooms 1B, 103, 104, and 105 are smaller in volume.

[0139] In traditional configuration schemes, a cutoff device is designed for each of the air-conditioned rooms 1A, 102, 103, 104, and 105, such as... Figure 7 As shown in Figures 51 to 55.

[0140] It is assumed that all the refrigerant in the air conditioning system 10 leaks into air-conditioned rooms 1A, 1B, 1C, 1D and 1E respectively, and the volume parameters of air-conditioned rooms 1A, 1B, 1C, 1D and 1E are obtained. Based on the assumed leakage amount and volume parameters, the assumed leakage concentration of each air-conditioned room is calculated. When the assumed leakage concentration is higher than the corresponding safe concentration threshold of the air-conditioned room, a cut-off device is configured for the air-conditioned room in the initial scheme.

[0141] For example, since air-conditioned room 1A is relatively large, even if all the refrigerant leaks into room 1A, the leakage concentration is assumed to be below the safe concentration threshold, and there is no safety risk. However, since air-conditioned rooms 1B, 1C, 1D, and 1E are relatively small, if all the refrigerant leaks into any one of them, assuming the leakage concentration is above the safe concentration threshold, then in the initial plan, a shut-off device is configured for air-conditioned rooms 1B, 1C, 1D, and 1E, such as... Figure 8As shown in Figures 511 to 514. An example of the initial scheme is as follows: Figure 8 As shown.

[0142] In one or more embodiments of this application, the verification unit 612 performs a condition safety verification of the initial scheme based on simulated operating conditions, including as follows: Figure 9 The steps are shown.

[0143] Step S201: Obtain the cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device.

[0144] Step S202: Calculate the refrigerant leakage amount of the indoor unit under simulated operating conditions based on refrigeration parameters.

[0145] Step S203: Obtain the effective volume of the air-conditioned room that meets the boundary volume conditions.

[0146] Step S204: Calculate the leakage concentration under simulated operating conditions based on the refrigerant leakage amount and effective volume.

[0147] Step S205: Determine whether the leakage concentration under simulated operating conditions is lower than the preset concentration threshold.

[0148] Step S206: If the leakage concentration under simulated operating conditions is lower than the preset concentration threshold, it is assumed that the air-conditioned room downstream of the cut-off device is in a safe state.

[0149] Step S207: If the leakage concentration under simulated operating conditions is higher than the preset concentration threshold, it is presumed that the air-conditioned room downstream of the cut-off device is not in a safe state.

[0150] In one or more embodiments of this application, the refrigerant leakage rate of the indoor unit under simulated operating conditions is the refrigerant leakage rate of the indoor unit under the most severe conditions.

[0151] In one or more embodiments of this application, the boundary volume condition is the smallest air-conditioned room.

[0152] In one or more embodiments of this application, the operational safety verification of the initial scheme based on simulated operating conditions is determined solely by assessing the relationship between the refrigerant leakage rate and the effective volume of the smallest air-conditioned room under the most severe conditions for all indoor units downstream of the cut-off device. If there is only one air-conditioned room downstream of the cut-off device, the effective volume is calculated based on the volume of this air-conditioned room.

[0153] In one or more embodiments of this application, the refrigeration parameters used to calculate the refrigerant leakage amount of the indoor unit under simulated operating conditions include: the leakage detection alarm time of the alarm device 207, the preset closing time of the shut-off device, the refrigerant leakage amount in the online piping, and the refrigerant leakage amount in the indoor heat exchanger 201.

[0154] In one or more embodiments of this application, the leakage detection alarm time of the alarm device 207 refers to the time interval from when the alarm device 207 detects a leak to when an alarm signal is generated.

[0155] In one or more embodiments of this application, the leakage detection alarm time of the alarm device 207 refers to the time interval from when the alarm device 207 detects a leak to when it stops generating an alarm signal.

[0156] In one or more embodiments of this application, the shut-off time of the shut-off device refers to the time interval from when the alarm device 207 generates an alarm signal to when the solenoid valve in the shut-off device is completely closed and cuts off the refrigerant supply to the indoor unit 200.

[0157] In one or more embodiments of this application, the shut-off time of the cut-off device is preset.

[0158] In one or more embodiments of this application, the refrigerant leakage allowance in the online piping refers to the maximum amount of refrigerant that could leak from the online piping (including gas-side online piping 300 and liquid-side online piping 400) assuming a leak occurs.

[0159] In one or more embodiments of this application, the refrigerant leakage capacity of the indoor heat exchanger refers to the maximum amount of refrigerant that the indoor heat exchanger may leak out assuming a leak occurs.

[0160] In one or more embodiments of this application, the refrigerant leakage amount m of the indoor unit under simulated operating conditions is calculated based on refrigeration parameters. rl The following formula can be used to calculate:

[0161]

[0162] Among them, t r1 It is the leak detection alarm time of the alarm device, t cl It is the closing time of the cut-off device, ρ g The density of the gaseous refrigerant in the gas-side piping of the gas-side connection, l g d is the length of the gas-side connection piping. g ρ is the diameter of the gas-side connection piping; l The density of the liquid refrigerant in the liquid-side piping of the unit is l l d is the length of the gas-side connection piping. l V is the diameter of the gas-side piping, and V is the volume of the heat exchanger. k is a constant, with time units converted to additive weight units based on empirical data.

[0163] Where ρ g ρ lThis refers to the concentration detected under harsh working conditions, such as one or more combinations of high-temperature, low-temperature, high-humidity, and high-dust environments.

[0164] The boundary volume condition is to minimize the volume of the air-conditioned room, that is, to obtain the effective volume of the smallest air-conditioned room downstream of the cut-off device, denoted as: V r .

[0165] The leakage concentration M under simulated operating conditions is calculated based on the refrigerant leakage rate and effective volume, where M = m rl / V r .

[0166] The system determines whether the leakage concentration under simulated operating conditions is lower than a preset concentration threshold, d, which can be generated based on the LFL (Leakage Fluctuation Level). In one or more embodiments of this application, the preset concentration threshold d is the product of the LFL and a constant less than 1.

[0167] In one or more embodiments of this application, the verification unit 612 is further configured to perform, as follows: Figure 10 The steps are shown.

[0168] Step S301: If, in the initial verification scheme, at least one air-conditioned room downstream of the cut-off device is not in a safe state, the verification department calls upon the correction of the indoor unit's cooling parameters.

[0169] In one or more embodiments of this application, the capacity corresponding to the cooling parameters of the corrected indoor unit is lower than the capacity corresponding to the cooling parameters of the indoor unit of the air-conditioned room downstream of the obtained cut-off device, that is, the corrected indoor unit simulates a smaller capacity indoor unit.

[0170] In one or more embodiments of this application, multiple decreasing correction parameters for the indoor unit cooling are preset and stored.

[0171] In one or more embodiments of this application, the cooling parameters of the indoor unit are corrected to the indoor unit capacity.

[0172] In one or more embodiments of this application, the cooling parameters of the indoor unit are corrected to the volume of the indoor heat exchanger.

[0173] Step S302: Correct the obtained cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device by correcting the cooling parameters of the indoor unit.

[0174] In one or more embodiments of this application, the indoor unit in the initial scheme is replaced with a simulated, smaller capacity indoor unit.

[0175] Step S303: Perform a safety check of the operating conditions again.

[0176] Step S304: If the air-conditioned rooms downstream of the shut-off device are in a safe state after the safety check is performed again, the cooling parameters of the indoor unit should be corrected in the configuration scheme, and it is recommended to replace the indoor unit with a smaller capacity to reduce the safety risk.

[0177] Step S305: If, after another safety check of the operating conditions, at least one air-conditioned room downstream of the cut-off device is not in a safe state, then a smaller set of calibration indoor unit cooling parameters is invoked, and the above steps are repeated.

[0178] In one or more embodiments of this application, if the verification unit 612 cannot obtain a verification result that the air-conditioned room downstream of the cut-off device is in a safe state, the output unit 614 prohibits the output of the configuration scheme.

[0179] If, during the safety verification based on the minimum set of refrigeration parameters of the indoor unit, at least one air-conditioned room downstream of the cut-off device is still not in a safe state, then the presumption verification unit 612 cannot obtain a verification result indicating that the air-conditioned room downstream of the cut-off device is in a safe state, and the output unit 614 prohibits the output of the configuration scheme. This means that even if the minimum capacity indoor unit is installed, a safe state cannot be achieved, and construction is not permitted.

[0180] In one or more embodiments of this application, the merging unit 613 is configured to generate a merging scheme by merging at least two cutting-off devices in the initial scheme from downstream to upstream when the air-conditioned room downstream of the cutting-off device is in a safe state.

[0181] For example, such as Figure 11 As shown, when the air-conditioned room downstream of the cut-off device is in a safe state, the cut-off device 512 and the cut-off device 513 are merged into a new cut-off device 522, generating a merged scheme.

[0182] In one or more embodiments of this application, the merging unit 613 is configured to merge at least two cutting-off devices in the initial scheme when the air-conditioned room downstream of the cutting-off device is in a safe state, and to presume whether the capacity of the indoor unit downstream of the merged cutting-off device is lower than the system performance capacity threshold. If it is lower than the system performance capacity threshold, a merging scheme is generated.

[0183] In one or more embodiments of this application, the system performance capacity threshold is generated based on the capacity of all indoor units downstream of the cutoff device.

[0184] In one or more embodiments of this application, the system performance capacity threshold is the sum of the capacities of all indoor units downstream of the cut-off device, for example, 10 HP.

[0185] In one or more embodiments of this application, the merging unit 613 is configured to perform as follows: Figure 12The steps are shown.

[0186] Step S401: Determine whether the capacity of the indoor unit downstream of the cut-off device is lower than the system performance capacity threshold.

[0187] Step S402: If the capacity of the indoor unit downstream of the cut-off device is lower than the system performance capacity threshold, a merging scheme is generated.

[0188] Step S403: If the capacity of the indoor unit downstream of the cut-off device is higher than the system performance capacity threshold, the generation of a merging scheme is not allowed to avoid the pressure loss of the cut-off device affecting the system performance of the refrigeration system and causing a significant drop in system performance.

[0189] For example, such as Figure 11 As shown, when the air-conditioned room downstream of the cut-off device is in a safe state, the cut-off device 512 and the cut-off device 513 are merged into a new cut-off device 522. The sum of the capacities of the indoor units downstream of the cut-off device 522 is higher than the system performance capacity threshold, thus generating a merging scheme.

[0190] Output unit 614 is configured to perform a safety check on the merging scheme based on simulated operating conditions. If both air-conditioned rooms 1D and 1E are in a safe state, there is a possibility of continued merging. Following a downstream-to-upstream sequence, cut-off device 522 and cut-off device 514 are merged into cut-off device 534. The sum of the capacities of the indoor units downstream of cut-off device 534 is higher than the system performance capacity threshold, generating a merging scheme. Output unit 614 further performs a safety check on the merging scheme based on simulated operating conditions. If any of the air-conditioned rooms 1C, 1D, and 1E is no longer in a safe state, then... Figure 13 The merge scheme shown is output as a configuration scheme.

[0191] If air-conditioned rooms 1C, 1D, and 1E are all in a safe state, there is a possibility of further merging. Following the order from downstream to upstream, shut-off device 534 and shut-off device 511 are merged into shut-off device 541. The sum of the capacities of the indoor units downstream of shut-off device 541 is higher than the system performance capacity threshold, generating a merging scheme. Output unit 614 further performs a safety check on the merging scheme based on simulated operating conditions. If air-conditioned rooms 1A, 1B, 1C, 1D, and 1E are all in a safe state, there is a possibility of further merging. However, at this time, there is only one shut-off device in the air conditioning system 10, and merging is no longer performed, so as... Figure 14 The merge scheme shown is output as a configuration scheme.

[0192] In one or more embodiments of this application, the configuration module 600 performs the following... Figure 15 The steps are shown.

[0193] Step S501: Perform a leakage safety check based on the assumed leakage amount, and generate an initial scheme for configuring the cut-off device based on the results of the leakage safety check.

[0194] Step S502: Perform a safety check on the initial scheme based on simulated operating conditions to verify whether the air-conditioned room downstream of the cut-off device is in a safe state in the initial scheme.

[0195] Step S503: If in a safe state, merge at least two cut-off devices from the initial scheme.

[0196] Step S504: If not in a safe state, correct the indoor unit cooling parameters of the indoor unit of the air-conditioned room downstream of the cut-off device.

[0197] Step S505: Determine whether the capacity of the indoor unit downstream of the cut-off device is lower than the system performance capacity threshold.

[0198] Step S506: If the value is below the system performance capacity threshold, generate a merge scheme.

[0199] Step S507: Perform a safety check on the initial scheme based on simulated operating conditions to verify whether the air-conditioned room downstream of the cut-off device is in a safe state in the merged scheme.

[0200] Step S508: If not in a safe state, output the merged scheme as the configuration scheme.

[0201] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0202] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning system comprising: an indoor unit installed in an air conditioning room; and a cutoff device for cutting off a refrigerant supply of the indoor unit, characterized by further comprising: ； a configuration module for generating a configuration scheme of the cutoff device; the configuration module comprising: a generating unit configured to perform a leakage amount safety check based on a hypothetical leakage amount and generate an initial scheme of configuring the cutoff device according to a result of the leakage amount safety check; a checking unit configured to perform a working condition safety check on the initial scheme based on a simulated working condition, and verify whether the air conditioning room downstream of the cutoff device in the initial scheme is in a safe state in performing the working condition safety check; a merging unit configured to merge at least two cutoff devices in the initial scheme to generate a merged scheme when the air conditioning room downstream of the cutoff device is in the safe state; and an output unit configured to perform a working condition safety check on the merged scheme based on the simulated working condition, and output a previous merged scheme as the configuration scheme when any one of the air conditioning rooms downstream of the cutoff device is no longer in the safe state. 2.The air conditioning system according to claim 1, wherein: the generating unit performing the leakage amount safety check based on the hypothetical leakage amount comprises: assuming that the refrigerant leaks into one of the air conditioning rooms to generate the hypothetical leakage amount; obtaining a volume parameter of the air conditioning room; calculating an air conditioning room hypothetical leakage concentration based on the hypothetical leakage amount and the volume parameter; and configuring one of the cutoff devices for the air conditioning room in the initial scheme when the air conditioning room hypothetical leakage concentration is higher than a safety concentration threshold. 3.The air conditioning system according to claim 2, wherein: the checking unit performing the working condition safety check on the initial scheme based on the simulated working condition comprises: obtaining a refrigeration parameter of an indoor unit of the air conditioning room downstream of the cutoff device; calculating a refrigerant leakable amount of the indoor unit under the simulated working condition based on the refrigeration parameter; obtaining an effective volume of the air conditioning room satisfying a boundary volume condition; calculating a simulated working condition leakage concentration based on the refrigerant leakable amount and the effective volume; and verifying that the air conditioning room downstream of the cutoff device is in the safe state when the simulated working condition leakage concentration is lower than a preset concentration threshold. 4.The air conditioning system according to claim 3, wherein: if verifying that at least one of the air conditioning rooms downstream of the cutoff device in the initial scheme is not in the safe state, the checking unit is configured to: call a corrected indoor unit refrigeration parameter; correct the obtained refrigeration parameter of the indoor unit of the air conditioning room downstream of the cutoff device with the corrected indoor unit refrigeration parameter, and perform the working condition safety check again until the air conditioning room downstream of the cutoff device is in the safe state; and wherein the corrected indoor unit refrigeration parameter corresponds to a capacity lower than that of the obtained refrigeration parameter of the indoor unit of the air conditioning room downstream of the cutoff device. 5.The air conditioning system according to claim 3, wherein: if the checking unit fails to obtain a checking result that the air conditioning room downstream of the cutoff device is in the safe state, the output unit prohibits outputting the configuration scheme. ​ 6. The air conditioning system according to any one of claims 1 to 5, wherein: the merging unit is configured to merge at least two of the initial schemes downstream to upstream to generate a merged scheme when the air-conditioned room downstream of the cut-off device is in a safe state.

7. The air conditioning system according to any one of claims 1 to 5, wherein: the merging unit is configured to merge at least two of the initial schemes and to determine whether the capacity of the indoor unit downstream of the merged cut-off device is lower than a system performance capacity threshold when the air-conditioned room downstream of the cut-off device is in a safe state; if lower than the system performance capacity threshold, the merged scheme is generated.

8. The air conditioning system according to any one of claims 1 to 5, wherein: the indoor unit comprises: a detection device for detecting the refrigerant concentration in the air-conditioned room; and an alarm device for generating an alarm signal when the refrigerant concentration in the air-conditioned room is higher than a pre-alarm concentration threshold.

9. The air conditioning system according to claim 8, wherein: the refrigeration parameters for calculating the refrigerant leakable amount of the indoor unit in the simulated working condition include: the leak detection alarm time of the alarm device; the closing time of the cut-off device; the refrigerant leakable amount in the online pipe; and / or the refrigerant leakable amount of the indoor heat exchanger in the indoor unit.

10. The air conditioning system according to any one of claims 2 to 5, characterized in that: the safe concentration threshold is generated based on the lower flammable concentration and the volume parameter of the air-conditioned room.

Images