Air conditioning system

Abstract

The application discloses an air conditioning system, which comprises an air conditioner outdoor unit, a plurality of air conditioner indoor units, a valve box and a controller. The air conditioner outdoor unit is provided with an outdoor unit liquid pipe and an outdoor unit gas pipe. The air conditioner indoor units are provided with indoor unit liquid pipes and indoor unit gas pipes. The valve box is provided with a plurality of pipeline connection assemblies, and each pipeline connection assembly comprises an electronic expansion valve. The controller is configured to determine a currently detected pipeline connection assembly. The controller is configured to determine the currently detected pipeline connection assembly, record an air conditioner indoor unit address of a circuit connected to the currently detected pipeline connection assembly, detect an air conditioner indoor unit address of a refrigerant pipe connected to the currently detected pipeline connection assembly and not connected to the currently detected pipeline connection assembly, and query a pipeline connection assembly connected to the air conditioner indoor unit according to the detected air conditioner indoor unit address. The valve box of the air conditioning system is automatically detected in terms of piping and circuit, the detection efficiency is improved, and a correct connection modification scheme is provided.

Description

Technical Field

[0001] This invention relates to air conditioners, and more particularly to an air conditioning system. Background Technology

[0002] Air conditioners are common household appliances. They typically consist of an indoor unit and an outdoor unit, with the indoor unit installed indoors and the outdoor unit outdoors. For air conditioning systems with one outdoor unit connecting multiple indoor units, a valve box is usually installed to facilitate the piping and communication connections between the indoor and outdoor units. In systems with valve boxes, the outdoor unit is connected to the valve box, and the valve box is connected to the indoor units via refrigerant piping, significantly increasing system complexity. During actual installation, errors in the connection between the valve box and the piping (i.e., inconsistencies between the communication line and the connecting pipe) frequently occur. Once a piping connection error is discovered, each pipe must be checked individually, making the repair process cumbersome.

[0003] Chinese Patent Publication No. CN104676818A discloses a control method for a multi-split air conditioning system. The system includes an outdoor unit, multiple valve boxes, and multiple indoor units. The method includes: if the operating mode of the multi-split system is detected to be either full heating mode or simultaneous heating and cooling mode, and the i-th indoor unit operating in heating mode enters an anti-cold air mode, the method acquires the first saturation temperature of the first gas pipe on the outdoor unit side of the valve box corresponding to the i-th indoor unit, the temperature of the first liquid pipe corresponding to the i-th indoor unit, and the first ambient temperature where the i-th indoor unit is located; n is the total number of indoor units operating in heating mode; the method calculates the first temperature difference between the first saturation temperature and the first liquid pipe temperature, and the second temperature difference between the first ambient temperature and the first liquid pipe temperature; if the first temperature difference is greater than or equal to a first preset temperature threshold, and the second temperature difference is greater than or equal to a second preset temperature threshold, the method outputs a prompt message indicating that the gas pipe on the outdoor unit side of the i-th indoor unit is reversed, and controls the first switch valve corresponding to the i-th indoor unit to close, and controls the second switch valve corresponding to the i-th indoor unit to open.

[0004] The above solution can only calculate branches where heating commands are executed but cooling is actually performed due to reversed high-pressure pipes and low-pressure pipes, but it cannot handle branches where cooling commands are executed but heating is performed.

[0005] Therefore, this paper addresses how to provide an automatic detection solution for the piping and wiring of valve boxes in air conditioning systems to improve detection efficiency and provide correct connection modification solutions. Summary of the Invention

[0006] In response to the problems mentioned in the background art, the present invention proposes an air conditioning system that enables automatic detection of piping and wiring in the valve box of the air conditioning system to improve detection efficiency and provide correct connection modification solutions.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] In some embodiments of this application, an air conditioning system is provided, including:

[0009] An outdoor unit for an air conditioner, wherein the outdoor unit is equipped with an outdoor unit liquid pipe and an outdoor unit gas pipe;

[0010] Multiple indoor air conditioning units, each indoor air conditioning unit being equipped with an indoor unit liquid pipe and an indoor unit gas pipe;

[0011] A valve box is provided with multiple pipeline connection assemblies, each including an electronic expansion valve; the indoor unit liquid pipe is connected to the outdoor unit liquid pipe, the indoor unit gas pipe is connected to the electronic expansion valve in the pipeline connection assembly, and the electronic expansion valve is connected to the outdoor unit gas pipe; the air conditioner indoor unit is electrically connected to the corresponding electronic expansion valve in the pipeline connection assembly.

[0012] The controller is electrically connected to the indoor unit of the air conditioner;

[0013] The controller is configured to determine the currently detected pipeline connection component;

[0014] The controller is configured to record the address of the air conditioner indoor unit where the current detection pipeline connection component is connected to the air conditioner.

[0015] The controller is configured to detect the address of the air conditioner indoor unit where the refrigerant line of the indoor unit is connected to the current detection line connection assembly and the circuit is not connected to the current detection line connection assembly.

[0016] The controller is configured to query the pipeline connection components of its circuit based on the detected address of the indoor air conditioning unit.

[0017] Compared with existing technologies, the advantages and positive effects of this invention are as follows: The controller determines the currently detected pipeline connection component, then records the address of the air conditioner indoor unit connected to the circuit of the currently detected pipeline connection component, and detects the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the currently detected pipeline connection component but whose circuit is not connected to the currently detected pipeline connection component. The detected air conditioner indoor unit address is used to query the pipeline connection component whose circuit is connected. The operator can determine the pipeline connection component corresponding to the actual circuit connection address based on the query result, facilitating accurate modification of the circuit connection address and achieving automatic detection of the piping and wiring of the valve box in the air conditioning system, thereby improving detection efficiency.

[0018] In some embodiments of this application, the electronic expansion valve includes a first expansion valve and a second expansion valve;

[0019] The outdoor unit air pipe includes an outdoor unit low-pressure air pipe and an outdoor unit high-pressure air pipe;

[0020] The indoor unit's gas pipe is respectively connected to the first expansion valve and the second expansion valve in the corresponding pipeline connection assembly. The first expansion valve is connected to the low-pressure gas pipe of the outdoor unit, and the second expansion valve is connected to the high-pressure gas pipe of the outdoor unit. The air conditioner's indoor unit is electrically connected to the first expansion valve and the second expansion valve in the corresponding pipeline connection assembly.

[0021] The controller is configured to determine the currently detected pipeline connection assembly based on the states of the first expansion valve and the second expansion valve.

[0022] By configuring a first expansion valve and a second expansion valve to meet the piping connection requirements of the low-pressure and high-pressure gas pipes of the indoor and outdoor units of the air conditioner, and by recording the on / off status of the first and second expansion valves in the pipeline connection assembly during testing, the pipeline connection assembly to be tested is determined.

[0023] In some embodiments of this application, the controller is configured to send a cooling operation signal to any one of the air conditioning indoor units and then send a heating operation signal to all the remaining air conditioning indoor units; record the on / off state of each electronic expansion valve in the valve box, and determine the pipeline connection assembly that has not been tested and whose second expansion valve is in the closed state and the first expansion valve is in the open state as the pipeline connection assembly currently being tested.

[0024] After the detection begins, the controller sends a cooling operation signal to any one of the indoor air conditioning units and then sends a heating operation signal to all the other indoor air conditioning units. At this time, the opening and closing states of the first and second expansion valves corresponding to the indoor air conditioning unit that is executing the cooling signal change. By finding the first and second expansion valves whose opening and closing states have changed, the pipeline connection assembly currently being detected can be determined, and the connection of each indoor air conditioning unit corresponding to that pipeline connection assembly can be detected.

[0025] In some embodiments of this application, the controller is configured to record the address of the air conditioner indoor unit when the state of the air conditioner indoor unit is non-heating, and the air conditioner indoor unit address is the address of the air conditioner indoor unit whose circuit connection to the current detection pipeline connection component is located.

[0026] For air conditioning indoor units connected in the same pipeline connection assembly, only the same operating command can be executed, and only the first operating command received will be executed. When the controller sends a cooling command to any air conditioning indoor unit of the currently detected pipeline connection assembly and then sends a heating operation command to all other air conditioning indoor units, the circuit connection address of the air conditioning indoor unit whose operating mode is non-heating belongs to the same pipeline connection assembly. Therefore, by recording the address of the air conditioning indoor unit whose state is non-heating, the circuit connection address of the air conditioning indoor unit of the currently detected pipeline connection assembly can be obtained.

[0027] In some embodiments of this application, the controller is configured to record multiple liquid pipe temperatures TI1 and multiple gas pipe temperatures Tg1 of each air conditioner indoor unit before any air conditioner indoor unit executes a cooling operation signal; and to record multiple liquid pipe temperatures TI2 and multiple gas pipe temperatures Tg2 of each air conditioner indoor unit after all other air conditioner indoor units execute a heating operation signal.

[0028] Before any indoor unit of an air conditioner executes the cooling operation signal, calculate the average liquid pipe temperature TIave1(n) and the average gas pipe temperature Tgave1(n) of each indoor unit of the air conditioner; calculate the average liquid pipe temperature TIave2(n) and the average gas pipe temperature Tgave2(n) of each indoor unit of the air conditioner after all other indoor units of the air conditioner execute the heating operation signal.

[0029] Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g1 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n);

[0030] When the temperature difference in the trachea is ΔT g1 (n) is greater than the first preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n) When the difference is greater than the second preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the current detection pipeline connection component and the circuit is not connected to the current detection pipeline connection component;

[0031] n represents the address of the indoor unit of the air conditioner.

[0032] The algorithm analyzes the temperature changes in the gas pipe and liquid pipe of the indoor unit caused by the changes in the electronic expansion valve before and after the indoor unit executes different operating signals. It sets dual discrimination conditions to eliminate the interference of operating condition fluctuations. This achieves the technical effect of indirectly judging whether the circuit connection is incorrect through temperature parameters, so as to realize the convenient and accurate detection of the correctness of the circuit connection.

[0033] In some embodiments of this application, the controller is configured to, after the previous pipeline connection component completes the detection, keep the operating mode of any indoor unit whose circuit connection state is not determined unchanged, and send a repulsive operating mode to all other air conditioning indoor units.

[0034] When testing the next pipeline connection component, the operating mode of any corresponding indoor unit can be kept unchanged, and then the mutually exclusive operating mode can be sent to the other indoor units, thereby eliminating downtime and effectively shortening the testing process.

[0035] In some embodiments of this application, when any indoor air conditioner unit corresponding to the current detection pipeline connection component is in cooling operation mode, after the detection is completed, the controller is configured to keep any indoor unit with an undetermined circuit connection state in heating operation mode and send cooling operation commands to all other indoor units.

[0036] Record the on / off status of each electronic expansion valve in the valve box, and update the pipeline connection components that have not yet been tested, where the first expansion valve is closed and the second expansion valve is open, to the pipeline connection components currently being tested.

[0037] Record the circuit connection address of the air conditioner indoor unit of the currently detected pipeline connection component;

[0038] The system detects the indoor unit address where the refrigerant pipeline of the air conditioner is connected to the current detection pipeline connection assembly, but the circuit is not connected to the current detection pipeline connection assembly.

[0039] When testing any pipeline connection component, the addresses of the indoor air conditioner units connected to the circuit and the indoor air conditioner units connected to the refrigerant lines are detected simultaneously. The addresses of the indoor air conditioner units whose refrigerant lines are connected to the pipeline connection component but whose circuits are not connected to the pipeline connection component are directly output, eliminating the need to compare the addresses of all indoor air conditioner units, thus improving testing efficiency. At the same time, the pipeline connection component to be tested is determined before testing, which improves testing accuracy.

[0040] In some embodiments of this application, the controller is configured to record multiple liquid pipe temperatures TI3 and multiple gas pipe temperatures Tg3 of each air conditioner indoor unit after all other air conditioner indoor units execute the cooling operation signal.

[0041] Calculate the average liquid pipe temperature TIave3(n) and the average gas pipe temperature Tgave3(n) of each indoor air conditioner unit;

[0042] Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g2 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n);

[0043] When the temperature difference in the trachea is ΔT g2 (n) is greater than the third preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n) When the difference is greater than the fourth preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the current detection pipeline connection component and the circuit is not connected to the current detection pipeline connection component;

[0044] n represents the address of the indoor unit of the air conditioner.

[0045] The algorithm analyzes the temperature changes in the gas pipe and liquid pipe of the indoor unit caused by the changes in the electronic expansion valve before and after the indoor unit executes different operating signals. It sets dual discrimination conditions to eliminate the interference of operating condition fluctuations and updates the judgment parameters to adapt to different operating conditions, thereby improving the detection accuracy.

[0046] In some embodiments of this application, the tracheal temperature difference ΔT g1 The formula for calculating (n) is: ΔT g1 (n)=Tgave1(n)-Tgave2(n);

[0047] Temperature difference change ΔT in gas-liquid pipe g,t1 The formula for calculating (n) is: ΔT g,t1 (n) = (Tgave2(n)- TIave2(n))-(Tgave1(n)- TIave1(n));

[0048] The tracheal temperature difference ΔT g2 The formula for calculating (n) is: ΔT g2 (n)=Tgave3(n)-Tgave1(n);

[0049] Temperature difference change ΔT in gas-liquid pipe g,t2 The formula for calculating (n) is: ΔT g,t2 (n) = (Tgave3(n)-TIave3(n))-(Tgave1(n)-TIave1(n)).

[0050] Based on the parameters collected under different operating conditions, regardless of whether the other indoor air conditioning units are in cooling or heating mode, the corresponding changes in gas pipe temperature difference and gas-liquid pipe temperature difference are calculated based on the parameters of the pipeline connection components before the first test. The first two pipeline connection components are calculated according to the above formula, and the remaining pipeline connection components to be tested are calculated cyclically according to the above formula.

[0051] In some embodiments of this application, the controller is configured to output a detection result after all pipeline connection components have been detected; the detection result includes a first detection result and a second detection result; the first detection result is used to display the circuit connection indoor unit address of each pipeline connection component;

[0052] The second detection result includes: if the situation where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly does not exist, then a prompt message indicating that the corresponding pipeline connection assembly is connected correctly is displayed; if the situation where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly exists, then the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly is displayed.

[0053] For cases where the refrigerant line is connected to the connection assembly but the electrical circuit is not connected to the connection assembly, the address of the indoor unit of the air conditioner is directly displayed, and the operator can directly modify it based on the address of the indoor unit of the air conditioner.

[0054] 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

[0055] 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.

[0056] Figure 1 This is one of the schematic diagrams of an embodiment of the air conditioning system of the present invention;

[0057] Figure 2 This is a second schematic diagram of an embodiment of the air conditioning system of the present invention;

[0058] Figure 3 This is one of the detection flowcharts of an embodiment of the air conditioning system of the present invention;

[0059] Figure 4 This is a second flowchart of the detection process of an embodiment of the air conditioning system of the present invention;

[0060] Figure 5 This is the third flowchart of the detection process of an embodiment of the air conditioning system of the present invention;

[0061] Figure 6 This is the fourth flowchart of the detection process of an embodiment of the air conditioning system of the present invention;

[0062] Figure 7This is the fifth flowchart of the detection process for an embodiment of the air conditioning system of the present invention.

[0063] Explanation of reference numerals in the attached figures:

[0064] 1. Outdoor unit of air conditioner; 11. Liquid pipe of outdoor unit; 12. Gas pipe of outdoor unit;

[0065] 121. Low-pressure gas pipe for outdoor unit; 122. High-pressure gas pipe for outdoor unit;

[0066] 2. Indoor unit of air conditioner; 21. Liquid pipe of indoor unit; 22. Gas pipe of indoor unit;

[0067] 3. Valve box; 31. Electronic expansion valve; 30. Pipeline connection assembly;

[0068] 311. First expansion valve; 312. Second expansion valve. Detailed Implementation

[0069] 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.

[0070] In this application, the air conditioner performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0071] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0072] The expansion valve 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 expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0073] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0074] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0075] like Figure 1 As shown, one embodiment of this application provides an air conditioning system, including:

[0076] An outdoor unit 1 for an air conditioner is provided with an outdoor unit liquid pipe 11 and an outdoor unit gas pipe 12.

[0077] Multiple air conditioning indoor units 2, each air conditioning indoor unit 2 is equipped with an indoor unit liquid pipe 21 and an indoor unit gas pipe 22;

[0078] A valve box 3 is provided with multiple pipeline connection assemblies 30, each pipeline connection assembly 30 including an electronic expansion valve 31; the indoor unit liquid pipe 21 is connected to the outdoor unit liquid pipe 11, the indoor unit gas pipe 22 is connected to the corresponding electronic expansion valve 31 in the pipeline connection assembly 30, and the electronic expansion valve 31 is connected to the outdoor unit gas pipe 12; the air conditioner indoor unit 2 is electrically connected to the corresponding electronic expansion valve 31 in the pipeline connection assembly 30.

[0079] The controller is electrically connected to the indoor unit 2 of the air conditioner;

[0080] The controller is configured to determine the currently detected pipeline connection assembly 30;

[0081] The controller is configured to record the address of the air conditioner indoor unit that is currently connected to the detection pipeline connection assembly 30;

[0082] The controller is configured to detect the address of the air conditioner indoor unit 2 where the refrigerant pipeline of the indoor unit 2 is connected to the current detection pipeline connection assembly 30 and the circuit is not connected to the current detection pipeline connection assembly 30.

[0083] The controller is configured to query the pipeline connection assembly 30 of its circuit connection based on the detected address of the indoor air conditioning unit.

[0084] Specifically, the air conditioning system includes at least one outdoor unit 1 and multiple indoor units 2. The communication line, liquid pipe 21 and gas pipe 22 of the indoor unit 2 are respectively connected to the corresponding pipeline connection assembly 30, so as to connect with the outdoor unit liquid pipe 11 and outdoor unit gas pipe 12 of the outdoor unit 1 through the pipeline connection assembly 30.

[0085] After completing the connection of the communication line and refrigerant pipeline, the circuit connection relationship and refrigerant pipeline connection relationship between the indoor unit 2 of the air conditioner and the pipeline connection assembly 30 can be tested.

[0086] like Figure 3 As shown, the controller executes step S1. The indoor unit of the air conditioner transmits its operating mode and parameters to the pipeline connection assembly 30 via the communication line. Based on this, the pipeline connection assembly 30 controls the electronic expansion valve 31 of the corresponding pipeline connection assembly to operate, thereby recording the circuit connection relationship between the pipeline connection assembly 30 and the corresponding indoor unit 2. The controller controls the operation of the indoor unit 2. During the operation of the indoor unit 2, the indoor unit 2 controls the electronic expansion valve 31 in the corresponding pipeline connection assembly 30 to operate via the corresponding communication line. By recording the electronic expansion valve 31 that generates the action, the currently detected pipeline connection assembly 30 can be determined.

[0087] After identifying the currently detected pipeline connection assembly 30, the controller executes step S2, recording the address of the air conditioner indoor unit whose circuit is connected to the currently detected pipeline connection assembly 30. The address of the air conditioner indoor unit whose circuit is connected to the currently detected pipeline connection assembly 30 can be determined by the change in the state of the corresponding electronic expansion valve 31 when each air conditioner indoor unit 2 executes a heating or cooling command, and then recorded. Next, the controller executes step S3, detecting the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the currently detected pipeline connection assembly 30 but whose circuit is not connected to the currently detected pipeline connection assembly 30. The address of the air conditioner indoor unit 2 whose refrigerant pipeline is connected to the currently detected pipeline connection assembly 30 but whose circuit is not connected to the currently detected pipeline connection assembly 30 can be determined based on the temperature change during the operation of the heating or cooling command.

[0088] After obtaining the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the current detection pipeline connection component 30 but whose circuit is not connected to the current detection pipeline connection component 30, the controller executes step S4 to query the pipeline connection component 30 to which its circuit is connected based on the detected air conditioner indoor unit address.

[0089] For air conditioning indoor units 2 where the refrigerant pipeline is connected to the current detection pipeline connection component 30 but the circuit is not connected to the current detection pipeline connection component 30, operators can easily adjust the circuit connection based on the actual circuit connection component 30 found, making maintenance and adjustment convenient for operators.

[0090] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The controller determines the currently detected pipeline connection component 30, then records the address of the air conditioner indoor unit connected to the circuit of the currently detected pipeline connection component 30, and detects the address of the air conditioner indoor unit 2 whose refrigerant pipeline is connected to the currently detected pipeline connection component 30 but whose circuit is not connected to the currently detected pipeline connection component 30. The detected air conditioner indoor unit address is used to query the pipeline connection component 30 to which its circuit is connected. The operator can determine the pipeline connection component 30 corresponding to its actual circuit connection address based on the query result, facilitating accurate modification of the circuit connection address and achieving automatic detection of the piping and wiring of the valve box 3 in the air conditioning system to improve detection efficiency.

[0091] In some embodiments of this application, such as Figure 2 As shown, the electronic expansion valve 31 includes a first expansion valve 311 and a second expansion valve 312;

[0092] The outdoor unit air pipe 12 includes an outdoor unit low-pressure air pipe 121 and an outdoor unit high-pressure air pipe 122.

[0093] The indoor unit gas pipe 22 is respectively connected to the first expansion valve 311 and the second expansion valve 312 in the corresponding pipeline connection assembly 30. The first expansion valve 311 is connected to the low-pressure gas pipe 121 of the outdoor unit, and the second expansion valve 312 is connected to the high-pressure gas pipe 122 of the outdoor unit. The air conditioner indoor unit 2 is electrically connected to the first expansion valve 311 and the second expansion valve 312 in the corresponding pipeline connection assembly 30.

[0094] The controller is configured to determine the currently detected pipeline connection assembly 30 based on the states of the first expansion valve 311 and the second expansion valve 312.

[0095] Specifically, there are two electronic expansion valves 31, namely a first expansion valve 311 and a second expansion valve 312; the outdoor unit air pipe 12 includes an outdoor unit low-pressure air pipe 121 and an outdoor unit high-pressure air pipe 122; the indoor unit air pipe 22 is connected to the outdoor unit low-pressure air pipe 121 through the first expansion valve 311, and the indoor unit air pipe 22 is connected to the outdoor unit high-pressure air pipe 122 through the second expansion valve 312.

[0096] The first expansion valve 311 and the second expansion valve 312 are configured to meet the piping connection requirements of the low-pressure and high-pressure gas pipes of the indoor unit 2 and the outdoor unit of the air conditioner. Furthermore, during testing, the pipeline connection assembly 30 to be tested is determined by the on / off state of the first expansion valve 311 and the second expansion valve 312 in the pipeline connection assembly 30.

[0097] In some embodiments of this application, for the currently detected pipeline connection assembly 30, the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the currently detected pipeline connection assembly 30 but whose circuit is not connected to the currently detected pipeline connection assembly 30 can be obtained immediately after the detection is completed; there is no need to wait for all pipeline connection assemblies 30 to be detected, compare all the detection results, and then find the address of the indoor unit with incorrect connection. The detection method of this embodiment can efficiently detect the address of the air conditioner indoor unit with incorrect circuit connection.

[0098] In some embodiments of this application, the controller is configured to send a cooling operation signal to any one of the air conditioning indoor units 2, and then send a heating operation signal to all the other air conditioning indoor units 2; record the on / off state of each electronic expansion valve 31 in the valve box 3, and determine the pipeline connection assembly 30 that has not yet completed detection when the second expansion valve 312 is in the closed state and the first expansion valve 311 is in the open state as the currently detected pipeline connection assembly 30.

[0099] After the detection begins, the controller sends a cooling operation signal to any one of the air conditioning indoor units 2, and then sends a heating operation signal to all the other air conditioning indoor units 2. At this time, the switching state of the first expansion valve 311 and the second expansion valve 312 corresponding to the air conditioning indoor unit 2 that is executing the cooling signal changes. By finding the first expansion valve 311 and the second expansion valve 312 whose switching state has changed, the pipeline connection assembly 30 currently being detected can be determined, and the connection of each air conditioning indoor unit corresponding to the pipeline connection assembly 30 can be detected.

[0100] In some embodiments, reference is made to Figure 1 As shown, for a valve box that only cuts off the valve, it does not have a first expansion valve 311 and a second expansion valve 312; at this time, the detected pipeline connection component can be found by reverse-engineering the communication address from the indoor unit address that receives the cooling signal from the indoor unit.

[0101] In this embodiment, the detection of the first pipeline connection assembly 30 is referenced. Figure 4 As shown, the controller executes step S11: simulates the outdoor unit sending a cooling operation signal to any indoor air conditioner unit 2; then executes step S12: sends a heating command to all other indoor air conditioner units 2.

[0102] When the states of the first expansion valve 311 and the second expansion valve 312 change, step S13 is executed: record the on / off state of each electronic expansion valve 31 in the valve box 3, and determine the pipeline connection assembly 30 that has not yet been tested, where the second expansion valve 312 is in the closed state and the first expansion valve 311 is in the open state, as the pipeline connection assembly 30 currently being tested.

[0103] In some embodiments of this application, the controller is configured to record the address of the air conditioner indoor unit 2 when the state is non-heating, which is the address of the air conditioner indoor unit currently being detected as the circuit connection address of the pipeline connection assembly 30.

[0104] For air conditioning indoor units 2 connected in the same pipeline connection assembly 30, only the same operating command can be executed, and only the first operating command received will be executed. When the controller sends a cooling command to any air conditioning indoor unit 2 of the currently detected pipeline connection assembly 30 and then sends a heating operation command to all other air conditioning indoor units 2, the circuit connection address of the air conditioning indoor unit whose operating mode is non-heating belongs to the same pipeline connection assembly 30. Therefore, by recording the address of the air conditioning indoor unit 2 whose state is non-heating, the circuit connection address of the air conditioning indoor unit of the currently detected pipeline connection assembly 30 can be obtained.

[0105] Specifically, after identifying the first pipeline connection assembly 30 to be tested, the detection of its circuit-connected indoor air conditioning unit begins. The controller records the address of the indoor air conditioning unit 2 as being in non-heating mode; these indoor air conditioning unit addresses are the circuit connections in the first pipeline connection assembly 30 to be tested.

[0106] In some embodiments of this application, the controller is configured to record multiple liquid pipe temperatures TI1 and multiple gas pipe temperatures Tg1 of each air conditioner indoor unit before any air conditioner indoor unit executes a cooling operation signal; and to record multiple liquid pipe temperatures TI2 and multiple gas pipe temperatures Tg2 of each air conditioner indoor unit after all other air conditioner indoor units execute a heating operation signal.

[0107] Before any indoor unit of an air conditioner executes the cooling operation signal, calculate the average liquid pipe temperature TIave1(n) and the average gas pipe temperature Tgave1(n) of each indoor unit of the air conditioner; calculate the average liquid pipe temperature TIave2(n) and the average gas pipe temperature Tgave2(n) of each indoor unit of the air conditioner after all other indoor units of the air conditioner execute the heating operation signal.

[0108] Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g1 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n);

[0109] When the temperature difference in the trachea is ΔT g1 (n) is greater than the first preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n) When the difference is greater than the second preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the current detection pipeline connection component 30 and whose circuit is not connected to the current detection pipeline connection component 30;

[0110] n represents the address of the indoor unit of the air conditioner.

[0111] The algorithm analyzes the temperature changes of the gas pipe and liquid pipe of the indoor unit caused by the changes in the electronic expansion valve 31 before and after the indoor unit 2 executes different operating signals. It sets dual discrimination conditions to eliminate the interference of operating condition fluctuations. This achieves the technical effect of indirectly judging whether the circuit connection is incorrect through temperature parameters, so as to realize the convenient and accurate detection of the correctness of the circuit connection.

[0112] Specifically, refer to Figure 5 As shown, the controller executes step S31: within a first preset time before any indoor air conditioner unit executes the cooling operation signal, it records multiple liquid pipe temperatures TI1 and multiple gas pipe temperatures Tg1 of each indoor air conditioner unit; the recording time interval is a second preset time. The controller executes step S32: within a first preset time after all other indoor air conditioner units execute the heating operation signal, it records multiple liquid pipe temperatures TI2 and multiple gas pipe temperatures Tg2 of each indoor air conditioner unit; the recording time interval is a second preset time.

[0113] The controller executes step S33: before any indoor air conditioner unit executes the cooling operation signal, calculate the average liquid pipe temperature TIave1(n) and the average gas pipe temperature Tgave1(n) of each indoor air conditioner unit; n represents the address of the indoor air conditioner unit.

[0114] For example, before any indoor unit of the air conditioner executes the cooling operation signal, the controller collects k liquid pipe temperatures TI1 and k gas pipe temperatures Tg1; the formula for calculating the average liquid pipe temperature of each indoor unit 2 is: TIave1(n) = (TI 1-1 +TI 1-2 +...+TI 1-k ) / k;The average gas pipe temperature of each indoor air conditioner unit 2, Tgave1(n)=(Tg 1-1 +Tg 1-2 +...+Tg 1-k ) / k.

[0115] The controller executes step S34: after all other indoor air conditioning units execute the heating operation signal, calculate the average liquid pipe temperature TIave2(n) and the average gas pipe temperature Tgave2(n) of each indoor air conditioning unit;

[0116] For example, after all the other indoor air conditioning units execute the heating operation signal, the controller collects k liquid pipe temperatures TI2 and k gas pipe temperatures Tg2; the formula for calculating the average liquid pipe temperature of each indoor air conditioning unit 2 is: TIave2(n) = (TI 2-1 +TI 2-2 +...+TI 2-k) / k;The average gas pipe temperature of each indoor air conditioner unit 2, Tgave2(n)=(Tg 2-1 +Tg 2-2 +...+Tg 2-k ) / k.

[0117] The controller executes step S35: Calculate the gas pipe temperature difference ΔT for each indoor air conditioning unit. g1 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n);

[0118] The tracheal temperature difference ΔT g1 The formula for calculating (n) is: ΔT g1 (n)=Tgave1(n)-Tgave2(n);

[0119] Temperature difference change ΔT in gas-liquid pipe g,t1 The formula for calculating (n) is: ΔT g,t1 (n) = (Tgave2(n)-TIave2(n))-(Tgave1(n)-TIave1(n)).

[0120] The controller executes step S36: when the tracheal temperature difference ΔT g1 (n) is greater than the first preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t1 When (n) is greater than the second preset difference, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the first detected pipeline connection component 30 and whose circuit is not connected to the first detected pipeline connection component 30.

[0121] When the system operating conditions fluctuate significantly, the change in ΔTg(n) of the indoor air conditioner unit in a shutdown state may also satisfy the above discriminant formula, but only the indoor air conditioner unit in cooling mode will satisfy the ΔTgt(n) discriminant formula. Therefore, setting dual discriminant conditions can effectively prevent interference from operating condition fluctuations.

[0122] In some embodiments, both the first preset time and the second preset time are empirical values ​​obtained after multiple trials.

[0123] In some embodiments, the first preset difference and the second preset difference are both empirical values ​​obtained after multiple trials.

[0124] After obtaining the address of an indoor air conditioner unit whose refrigerant piping is connected to the first detected piping connection assembly 30 but whose circuit is not connected to the first detected piping connection assembly 30, the controller executes step S4: Based on the detected indoor air conditioner unit address, it queries the piping connection assembly 30 to which the circuit is connected. The queried piping connection assembly 30 is the actual circuit connection of the indoor air conditioner unit. This effectively guides operators in modifying the circuit connections.

[0125] In some embodiments of this application, the controller is configured to, after the previous pipeline connection assembly 30 completes the detection, keep the operating mode of any indoor unit whose circuit connection state is not determined unchanged, and send a repulsive operating mode to all other air conditioning indoor units.

[0126] When testing the next pipeline connection component 30, the operating mode of any corresponding indoor unit can be kept unchanged, and then the mutually exclusive operating mode can be sent to the other indoor units, thereby eliminating downtime and effectively shortening the testing process.

[0127] In some embodiments, when the number of detected pipeline connection components 30 exceeds two, the operating mode of any air conditioning indoor unit corresponding to the second detected pipeline connection component 30 is opposite to the operating mode of any air conditioning indoor unit corresponding to the first detected pipeline connection component 30, and the operating mode of any air conditioning indoor unit corresponding to the third detected pipeline connection component 30 is the same as the operating mode of any air conditioning indoor unit corresponding to the first detected pipeline connection component 30.

[0128] For example, if the operating mode of any air conditioner indoor unit corresponding to the first detected pipeline connection assembly 30 is cooling, then the operating mode of any air conditioner indoor unit corresponding to the second detected pipeline connection assembly 30 is heating; the operating mode of any air conditioner indoor unit corresponding to the third detected pipeline connection assembly 30 is cooling; and the operating mode of any air conditioner indoor unit corresponding to the fourth detected pipeline connection assembly 30 is heating.

[0129] In this embodiment, the detection of the second pipeline connection assembly 30 is referred to... Figure 6 As shown, the controller executes step S11: keeping any indoor unit with an undetermined circuit connection in heating mode; then executes step S12: sending cooling commands to all other indoor air conditioning units 2.

[0130] When the states of the first expansion valve 311 and the second expansion valve 312 change, step S13 is executed: record the on / off state of each electronic expansion valve 31 in the valve box 3, and determine the pipeline connection assembly 30 that has not yet been tested, where the first expansion valve 311 is in the closed state and the second expansion valve 312 is in the open state, as the pipeline connection assembly 30 to be tested.

[0131] In some embodiments, the steps for acquiring the subsequent circuit connection address of the pipeline connection assembly 30 and determining whether the refrigerant pipeline connection is correct but the circuit connection is incorrect are as follows: the acquisition and determination steps for the third detected pipeline connection assembly 30 are the same as those for the first detected pipeline connection assembly 30; the acquisition and determination steps for the fourth detected pipeline connection assembly 30 are the same as those for the second detected pipeline connection assembly 30. This process continues sequentially, meaning that the acquisition and determination steps for pipeline connection assemblies 30 with odd-numbered detection sequences are the same as those for the first detected pipeline connection assembly 30; and the acquisition and determination steps for pipeline connection assemblies 30 with even-numbered detection sequences are the same as those for the second detected pipeline connection assembly 30.

[0132] In some embodiments of this application, when any indoor air conditioner unit corresponding to the current detection pipeline connection assembly 30 is in cooling operation mode, after the detection is completed, the controller is configured to keep any indoor unit with an undetermined circuit connection state in heating operation mode and send cooling operation commands to all other indoor units.

[0133] Record the on / off state of each electronic expansion valve 31 in the valve box, and update the pipeline connection assembly 30 where the first expansion valve 311 is in the closed state and the second expansion valve 312 is in the open state to the currently detected pipeline connection assembly 30.

[0134] Record the circuit connection address of the indoor air conditioner unit corresponding to the current detection pipeline connection assembly 30;

[0135] The air conditioner indoor unit is detected to have its refrigerant pipe connected to the current detection pipe connection component 30, but its circuit is not connected to the current detection pipe connection component 30.

[0136] When testing any pipeline connection component 30, the addresses of the air conditioner indoor units connected to its circuit and the air conditioner indoor units connected to its refrigerant pipes are detected simultaneously. The addresses of air conditioner indoor units whose refrigerant pipes are connected to the pipeline connection component 30 but whose circuits are not connected to the pipeline connection component 30 are directly output, eliminating the need to compare the addresses of all air conditioner indoor units after obtaining them, thus improving testing efficiency. At the same time, the pipeline connection component 30 to be tested is determined before testing, thus improving testing accuracy.

[0137] The above describes the testing steps for pipeline connection components 30 with an even-numbered testing sequence. The corresponding operating instructions are the opposite of the operating instructions for the indoor air conditioning unit when testing the first pipeline connection component 30.

[0138] In some embodiments of this application, the controller is configured to record multiple liquid pipe temperatures TI3 and multiple gas pipe temperatures Tg3 of each air conditioner indoor unit after all other air conditioner indoor units execute the cooling operation signal.

[0139] Calculate the average liquid pipe temperature TIave3(n) and the average gas pipe temperature Tgave3(n) of each indoor air conditioner unit;

[0140] Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g2 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n);

[0141] When the temperature difference in the trachea is ΔT g2 (n) is greater than the third preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n) When the difference is greater than the fourth preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the current detection pipeline connection component 30 and whose circuit is not connected to the current detection pipeline connection component 30;

[0142] n represents the address of the indoor unit of the air conditioner.

[0143] The algorithm analyzes the temperature changes in the gas pipe and liquid pipe of the indoor unit caused by the changes in the electronic expansion valve 31 before and after the indoor unit executes different operating signals. It sets dual discrimination conditions to eliminate the interference of operating condition fluctuations. At the same time, it updates the judgment parameters to adapt to different operating conditions, thereby improving the detection accuracy.

[0144] Specifically, refer to Figure 7 As shown, for the pipeline connection assembly 30, which is the second in the detection sequence, the controller executes step S31: within a first preset time after all other indoor air conditioning units execute the cooling operation signal, it records multiple liquid pipe temperatures TI3 and multiple gas pipe temperatures Tg3 of each indoor air conditioning unit; the recording time interval is the second preset time.

[0145] The controller executes step S32: after all other indoor air conditioning units execute the cooling operation signal, calculate the average liquid pipe temperature TIave3(n) and the average gas pipe temperature Tgave3(n) of each indoor air conditioning unit;

[0146] For example, after all the other indoor air conditioning units execute the cooling operation signal, the controller collects k liquid pipe temperatures TI2 and k gas pipe temperatures Tg3; the formula for calculating the average liquid pipe temperature of each indoor air conditioning unit 2 is: TIave3(n) = (TI 3-1 +TI 3-2 +...+TI 3-k ) / k;The average pipe temperature of each indoor air conditioner unit 2, Tgave3(n)=(Tg 3-1 +Tg 3-2 +...+Tg 3-k ) / k.

[0147] The controller executes step S33: Calculate the gas pipe temperature difference ΔT for each indoor air conditioning unit. g2 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n);

[0148] The tracheal temperature difference ΔT g2 The formula for calculating (n) is: ΔT g2 (n)=Tgave3(n)-Tgave1(n);

[0149] Temperature difference change ΔT in gas-liquid pipe g,t2 The formula for calculating (n) is: ΔT g,t2 (n) = (Tgave3(n)- TIave3(n))-(Tgave1(n)- TIave1(n))

[0150] The controller executes step S34: when the temperature difference ΔT in the trachea... g2 (n) is greater than the third preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t2 When (n) is greater than the fourth preset difference, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit whose refrigerant pipeline is connected to the first detected pipeline connection component 30 and whose circuit is not connected to the first detected pipeline connection component 30.

[0151] After obtaining the address of an indoor air conditioner unit whose refrigerant piping is connected to the second detected piping connection assembly 30 but whose circuit is not connected to the second detected piping connection assembly 30, the controller executes step S4: Based on the detected indoor air conditioner unit address, it queries the piping connection assembly 30 to which the circuit is connected. The queried piping connection assembly 30 is the actual circuit connection of the indoor air conditioner unit. This effectively guides operators in modifying the circuit connections.

[0152] In some embodiments, the third preset difference and the fourth preset difference are empirical values ​​obtained after multiple trials.

[0153] In some embodiments of this application, the controller is configured to output a detection result after all pipeline connection components 30 have been detected; the detection result includes a first detection result and a second detection result; the first detection result is used to display the circuit connection indoor unit address of each pipeline connection component 30;

[0154] The second detection result includes: if the situation where the refrigerant pipeline is connected to the pipeline connection assembly 30 but the circuit is not connected to the pipeline connection assembly 30 does not exist, then a prompt message indicating that the pipeline connection assembly 30 is correctly connected is displayed; if the situation where the refrigerant pipeline is connected to the pipeline connection assembly 30 but the circuit is not connected to the pipeline connection assembly 30 exists, then the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the pipeline connection assembly 30 but the circuit is not connected to the pipeline connection assembly 30 is displayed.

[0155] For cases where the refrigerant line is connected to the line connection assembly 30 but the circuit is not connected to the line connection assembly 30, the address of the indoor unit of the air conditioner is directly displayed, and the operator can directly modify it based on the address of the indoor unit of the air conditioner.

[0156] In some embodiments, the connection test results of each pipeline connection assembly 30 are viewed by flipping through PSW2 (↑) and PSW3 (↓). When there are four pipeline connection assemblies 30 in the air conditioning system, the first test result code (T1~T4) and the second test result code (J1~J4) of the pipeline connection assembly 30 are displayed sequentially by flipping down.

[0157] The first test result (T1~T4) displays the circuit connection address of each pipeline connection component 30 to the indoor unit, which is the communication line connection address to the indoor unit.

[0158] The second test results (J1~J4) fall into the following two categories:

[0159] For each pipe connection assembly 30, the address of the indoor unit whose refrigerant pipe is connected to that pipe connection assembly 30 but whose electrical circuit is not connected to that pipe connection assembly 30 is displayed, based on the following conditions:

[0160] 1) When an indoor unit is not present and its piping is connected to the piping connection assembly but its communication line is not connected to the piping connection assembly, it will be displayed as SS;

[0161] 2) When an indoor unit exists where the piping is connected to the piping connection assembly but the communication line is not connected to the piping connection assembly, the address of the indoor unit where the piping is connected to the piping connection assembly but the communication line is not connected to the piping connection assembly is displayed. When there are multiple indoor units with different addresses under the group, multiple address codes are arranged in sequence.

[0162] Examples:

[0163] A. Piping connection is correct (there are no indoor units where the piping is connected to the piping connection assembly but the communication line is not connected to the piping connection assembly) -- Display SS

[0164] When the test results for the first pipeline connection component show no indoor unit with piping connected to the pipeline connection component but no communication line connected to the pipeline connection component, it will display as SS, indicating that the piping connection of the first pipeline connection component is correct.

[0165] B. Piping connection error (There are indoor units where the piping is connected to the piping connection assembly but the communication cable is not connected to the piping connection assembly) -- Displays the address of the indoor unit where the piping is connected to the piping connection assembly but the communication cable is not connected to the piping connection assembly.

[0166] When the communication line of indoor unit #8 is connected to the second conduit connection assembly, and the piping of indoor unit #8 is mistakenly connected to the third conduit connection assembly, the third conduit connection assembly will detect that there is an indoor unit with piping connected to this conduit connection assembly but not with its communication line, and will display it as 8. If indoor unit #8 is found in T2, it means that indoor unit #8 is confused between the second and third conduit connection assemblies. You only need to change the communication line of indoor unit #8 from the second conduit connection assembly to the third conduit connection assembly, or change the piping of indoor unit #8 from the third conduit connection assembly to the second conduit connection assembly.

[0167] In some embodiments, piping refers to refrigerant connection pipes, and communication lines refer to circuits.

[0168] In some embodiments, when connection detection begins, it is first determined that all indoor air conditioning units are in a stopped state and the DSW4-1 switch is changed from OFF to ON.

[0169] In some embodiments, after the controller enters the detection process, the air conditioning system's display mode displays "PC" via a seven-segment code, indicating that the detection is in progress.

[0170] In some embodiments, the controller is also configured to set termination conditions for the detection function.

[0171] The controller will exit connection detection if any of the following conditions are met:

[0172] (1) If the DSW4-1 setting is changed to OFF during the test, the process will be terminated and the air conditioning system will no longer display "PC" via the seven-segment code.

[0173] (2) If any alarm signal or shutdown reason code is found in the outdoor unit, indoor unit or valve box itself during the test, the connection test function will be terminated and the air conditioning system display mode will no longer display "PC" and will display an abnormal code via the seven-segment code.

[0174] The DSW4-1 DIP switch needs to be switched back to OFF. After the alarm is cleared, if piping connection testing is still required, the switch must be reset and a trial run must be performed to start the testing process.

[0175] 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, characterized in that, include: An outdoor unit for an air conditioner, wherein the outdoor unit is equipped with an outdoor unit liquid pipe and an outdoor unit gas pipe; Multiple indoor air conditioning units, each indoor air conditioning unit being equipped with an indoor unit liquid pipe and an indoor unit gas pipe; A valve box is provided with multiple pipeline connection assemblies, each including an electronic expansion valve; the indoor unit liquid pipe is connected to the outdoor unit liquid pipe, the indoor unit gas pipe is connected to the electronic expansion valve in the pipeline connection assembly, and the electronic expansion valve is connected to the outdoor unit gas pipe; the air conditioner indoor unit is electrically connected to the corresponding electronic expansion valve in the pipeline connection assembly. The controller is electrically connected to the indoor unit of the air conditioner; The controller is configured to determine the currently detected pipeline connection component; The controller is configured to record the address of the air conditioner indoor unit where the current detection pipeline connection component is connected to the air conditioner. The controller is configured to detect the address of the air conditioner indoor unit where the refrigerant line of the indoor unit is connected to the current detection line connection assembly and the circuit is not connected to the current detection line connection assembly. The controller is configured to query the pipeline connection components of its circuit based on the detected address of the indoor air conditioning unit.

2. The air conditioning system according to claim 1, characterized in that, The electronic expansion valve includes a first expansion valve and a second expansion valve; The outdoor unit air pipe includes an outdoor unit low-pressure air pipe and an outdoor unit high-pressure air pipe; The indoor unit's gas pipe is respectively connected to the first expansion valve and the second expansion valve in the corresponding pipeline connection assembly. The first expansion valve is connected to the low-pressure gas pipe of the outdoor unit, and the second expansion valve is connected to the high-pressure gas pipe of the outdoor unit. The air conditioner's indoor unit is electrically connected to the first expansion valve and the second expansion valve in the corresponding pipeline connection assembly. The controller is configured to determine the currently detected pipeline connection assembly based on the states of the first expansion valve and the second expansion valve.

3. The air conditioning system according to claim 2, characterized in that, The controller is configured to send a cooling operation signal to any one of the indoor air conditioning units, and then send a heating operation signal to all the other indoor air conditioning units; record the on / off state of each electronic expansion valve in the valve box, and identify the pipeline connection assembly that has not yet been tested, where the second expansion valve is closed and the first expansion valve is open, as the pipeline connection assembly currently being tested.

4. The air conditioning system according to claim 3, characterized in that, The controller is configured to record the address of the indoor unit of the air conditioner when the status of the indoor unit is not heating. This address is the address of the indoor unit of the air conditioner whose circuit connection to the current detection pipeline connection component is located.

5. The air conditioning system according to any one of claims 2-4, characterized in that, The controller is configured to record multiple liquid pipe temperatures TI1 and multiple gas pipe temperatures Tg1 of each air conditioner indoor unit before any air conditioner indoor unit executes a cooling operation signal; and to record multiple liquid pipe temperatures TI2 and multiple gas pipe temperatures Tg2 of each air conditioner indoor unit after all other air conditioner indoor units execute a heating operation signal. Before any indoor unit of an air conditioner executes the cooling operation signal, calculate the average liquid pipe temperature TIave1(n) and the average gas pipe temperature Tgave1(n) of each indoor unit of the air conditioner; calculate the average liquid pipe temperature TIave2(n) and the average gas pipe temperature Tgave2(n) of each indoor unit of the air conditioner after all other indoor units of the air conditioner execute the heating operation signal. Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g1 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n); When the temperature difference in the trachea is ΔT g1 (n) is greater than the first preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t1 (n) When the difference is greater than the second preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the current detection pipeline connection component and the circuit is not connected to the current detection pipeline connection component; n represents the address of the indoor unit of the air conditioner.

6. The air conditioning system according to claim 1, characterized in that, The controller is configured to, after the previous pipeline connection component completes the detection, keep the operating mode of any indoor unit with an undetermined circuit connection status unchanged, and send a repulsive operating mode to all other air conditioning indoor units.

7. The air conditioning system according to claim 5, characterized in that, When any indoor air conditioner unit corresponding to the current detection pipeline connection component is in cooling operation mode, after the detection is completed, the controller is configured to keep any indoor unit with an undetermined circuit connection state in heating operation mode and send cooling operation commands to all other indoor units. Record the on / off status of each electronic expansion valve in the valve box, and update the pipeline connection components that have not yet been tested, where the first expansion valve is closed and the second expansion valve is open, to the pipeline connection components currently being tested. Record the circuit connection address of the air conditioner indoor unit of the currently detected pipeline connection component; The system detects the indoor unit address where the refrigerant pipeline of the air conditioner is connected to the current detection pipeline connection assembly, but the circuit is not connected to the current detection pipeline connection assembly.

8. The air conditioning system according to claim 7, characterized in that, The controller is configured to record multiple liquid pipe temperatures TI3 and multiple gas pipe temperatures Tg3 of each air conditioner indoor unit after all other indoor units of the air conditioner execute the cooling operation signal. Calculate the average liquid pipe temperature TIave3(n) and the average gas pipe temperature Tgave3(n) of each indoor air conditioner unit; Calculate the gas pipe temperature difference ΔT for each indoor air conditioner unit. g2 (n) and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n); When the temperature difference in the trachea is ΔT g2 (n) is greater than the third preset difference and the change in temperature difference ΔT between the gas and liquid pipes g,t2 (n) When the difference is greater than the fourth preset value, the address of the air conditioner indoor unit is recorded as the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the current detection pipeline connection component and the circuit is not connected to the current detection pipeline connection component; n represents the address of the indoor unit of the air conditioner.

9. The air conditioning system according to claim 8, characterized in that, The tracheal temperature difference ΔT g1 The formula for calculating (n) is: ΔT g1 (n)=Tgave1(n)-Tgave2(n); Temperature difference change ΔT in gas-liquid pipe g,t1 The formula for calculating (n) is: ΔT g,t1 (n) = (Tgave2(n)- TIave2(n))-(Tgave1(n)- TIave1(n)); The tracheal temperature difference ΔT g2 The formula for calculating (n) is: ΔT g2 (n)=Tgave3(n)-Tgave1(n); Temperature difference change ΔT in gas-liquid pipe g,t2 The formula for calculating (n) is: ΔT g,t2 (n) = (Tgave3(n)-TIave3(n))-(Tgave1(n)-TIave1(n)).

10. The air conditioning system according to claim 1, characterized in that, The controller is configured to output a detection result after all pipeline connection components have been detected; the detection result includes a first detection result and a second detection result. The first detection result is used to display the circuit connection address of the indoor unit for each pipeline connection component; The second detection result includes: if the situation where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly does not exist, then a prompt message indicating that the corresponding pipeline connection assembly is connected correctly is displayed; if the situation where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly exists, then the address of the air conditioner indoor unit where the refrigerant pipeline is connected to the pipeline connection assembly but the circuit is not connected to the pipeline connection assembly is displayed.

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