Air conditioning system, control method and control device

Abstract

An embodiment of the present invention provides an air conditioning system, control method, and control device. The air conditioning system includes a condenser, a compressor, and at least one refrigeration terminal module. By providing a temperature detection module for detecting temperature and a refrigerant monitoring module for monitoring refrigerant leakage in each refrigeration terminal module, the heat load and refrigerant leakage rate of each target refrigeration terminal module leaking refrigerant are determined. Based on the heat load and leakage rate, the passage between the target refrigeration terminal module and the condenser is sequentially disconnected. Because the present invention sequentially disconnects the passage between the target refrigeration terminal module and the condenser based on the heat load and leakage rate, the cooling effect will not drop suddenly due to disconnecting all target refrigeration terminal modules at the same time. Therefore, the risk of refrigerant leakage in the refrigeration terminal module can be reduced while ensuring smooth operation of the air conditioning refrigeration, thereby improving the performance of the air conditioning system.

Description

Technical Field

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

[0002] At present, in the field of computer room air conditioning, multi-split air conditioners have gradually been used due to their advantages such as rapid deployment and reduction of local hot spots.

[0003] The risk of using multi-split air conditioners lies in the large number of refrigeration terminals. If refrigerant leaks in some of the refrigeration terminals, after long-term operation, the refrigeration terminals of the entire air-conditioning system may lose their cooling capacity.

[0004] Therefore, how to reduce the risk of air conditioner refrigerant leakage is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] Embodiments of the present invention provide an air-conditioning system, a control method, and a control device, which are used to solve the problem of air-conditioning failure in a computer room air-conditioning system caused by refrigerant leakage in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides an air conditioning system, comprising: a condenser, a compressor, and at least one refrigeration terminal module, wherein the condenser, the compressor, and each refrigeration terminal module are sequentially connected via pipelines to form a loop; each refrigeration terminal module includes a gas pipe, an evaporator, and a liquid pipe connected in sequence, and the air conditioning system further comprises:

[0007] A refrigerant monitoring module corresponding to each refrigeration terminal module is used to monitor the refrigerant leakage of each refrigeration terminal module;

[0008] A temperature detection module corresponding to each refrigeration terminal module, used to detect the temperature of each refrigeration terminal module;

[0009] A controller is connected to the compressor, each refrigerant monitoring module and each temperature detection module, and is used to:

[0010] Determining, based on the refrigerant monitoring module that transmits the refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; determining, for each target refrigeration terminal module, a heat load of the target refrigeration terminal module based on the rotation speed of the compressor or the temperature of the target refrigeration terminal module, and determining a leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; determining a shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module;

[0011] According to the shutdown priority, the passage between the target refrigeration terminal module and the condenser is sequentially disconnected at preset time intervals.

[0012] In a possible implementation, a stop valve corresponding to each refrigeration terminal module is further included;

[0013] For each refrigeration terminal module, the shut-off valve is provided on the liquid pipe of the refrigeration terminal module;

[0014] The controller is connected to the stop valve and is used to control the stop valve to close so as to disconnect the passage between the target refrigeration terminal module and the condenser.

[0015] In a possible implementation, a one-way valve corresponding to each refrigeration terminal module is further included;

[0016] For each refrigeration terminal module, the one-way valve is arranged on the air pipe of the refrigeration terminal module.

[0017] In a possible implementation, the system further includes a throttling element corresponding to each refrigeration terminal module;

[0018] For each refrigeration terminal module, the throttling element is arranged on the liquid pipe of the refrigeration terminal module;

[0019] The controller is connected to the throttling element and is used to increase the opening of the throttling element when the refrigerant concentration is lower than the preset circulation concentration, and to reduce the opening of the throttling element when the refrigerant concentration is higher than the preset circulation concentration.

[0020] In a possible implementation, it further includes a first shut-off valve and a second shut-off valve;

[0021] The first shut-off valve is arranged between the condenser and each of the refrigeration terminal modules, and the second shut-off valve is arranged between the compressor and each of the refrigeration terminal modules.

[0022] In a possible implementation, the controller is further configured to:

[0023] If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load;

[0024] Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

[0025] In a possible implementation, the controller is further configured to:

[0026] Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

[0027] In a possible implementation, the controller is further configured to:

[0028] In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight;

[0029] The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

[0030] In a second aspect, an embodiment of the present invention further provides a control method for an air-conditioning system, which is applied to any air-conditioning system described in the first aspect, and the method includes:

[0031] Determining, based on the refrigerant monitoring module that transmits the refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; determining, for each target refrigeration terminal module, a heat load of the target refrigeration terminal module based on the rotation speed of the compressor or the temperature of the target refrigeration terminal module, and determining a leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; determining a shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module;

[0032] According to the shutdown priority, the passage between the target refrigeration terminal module and the condenser is sequentially disconnected at preset time intervals.

[0033] In a possible implementation, determining the heat load of the refrigeration terminal module according to the rotation speed of the compressor or the temperature of the refrigeration terminal module includes:

[0034] If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load;

[0035] Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

[0036] In a possible implementation, the method further includes:

[0037] Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

[0038] In a possible implementation, the method further includes:

[0039] In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight;

[0040] The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

[0041] In a third aspect, an embodiment of the present invention further provides a control device for an air conditioning system, which is applied to any air conditioning system described in the first aspect, and the device includes:

[0042] a determination unit configured to determine, based on the refrigerant monitoring module that transmits the refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; for each target refrigeration terminal module, determine, based on the rotation speed of the compressor or the temperature of the target refrigeration terminal module, a heat load of the target refrigeration terminal module, and determine, based on the refrigerant leakage amount of the target refrigeration terminal module, a leakage rate of the target refrigeration terminal module; and determine, based on the heat load and leakage rate of each target refrigeration terminal module, a shutdown priority of each target refrigeration terminal module;

[0043] A control unit is used to disconnect the passage between the target refrigeration terminal module and the condenser in sequence at preset time intervals according to the shutdown priority.

[0044] In a possible implementation manner, the determining unit is further configured to:

[0045] If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load;

[0046] Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

[0047] In a possible implementation manner, the determining unit is further configured to:

[0048] Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

[0049] In a possible implementation manner, the determining unit is further configured to:

[0050] In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight;

[0051] The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

[0052] An embodiment of the present invention provides an air-conditioning system, a control method and a control device, wherein the air-conditioning system includes: a condenser, a compressor and at least one refrigeration terminal module, wherein the condenser, the compressor and each refrigeration terminal module are sequentially connected through pipelines to form a loop; each refrigeration terminal module includes an air pipe, an evaporator and a liquid pipe connected in sequence, and the air-conditioning system further includes: a refrigerant monitoring module corresponding to each refrigeration terminal module, for monitoring the refrigerant leakage of each refrigeration terminal module; a temperature detection module corresponding to each refrigeration terminal module, for detecting the temperature of each refrigeration terminal module; a controller, respectively connected to the compressor, each refrigerant monitoring module and each The temperature detection module is connected and used to: determine the refrigeration terminal module leaking refrigerant as the target refrigeration terminal module based on the refrigerant monitoring module that sends the refrigerant leakage amount; for each target refrigeration terminal module, determine the heat load of the target refrigeration terminal module based on the speed of the compressor or the temperature of the target refrigeration terminal module, and determine the leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; determine the shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module; and sequentially disconnect the path between the target refrigeration terminal module and the condenser at preset time intervals based on the shutdown priority. Since the present invention sequentially disconnects the path between the target refrigeration terminal module and the condenser based on the heat load and refrigerant leakage rate of the target refrigeration terminal module, the refrigeration effect will not drop suddenly due to disconnecting all the target refrigeration terminal modules at the same time. Therefore, the risk of refrigerant leakage in the refrigeration terminal module can be reduced while ensuring the smooth operation of the air conditioning refrigeration, thereby improving the performance of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0054] Figure 1 A schematic structural diagram of an air conditioning system provided by an embodiment of the present invention;

[0055] Figure 2A schematic structural diagram of another air-conditioning system provided by an embodiment of the present invention;

[0056] Figure 3 A schematic structural diagram of another air-conditioning system provided by an embodiment of the present invention;

[0057] Figure 4 A schematic structural diagram of another air-conditioning system provided by an embodiment of the present invention;

[0058] Figure 5 A schematic flow chart of a control method for an air-conditioning system provided by an embodiment of the present invention;

[0059] Figure 6 A schematic structural diagram of a control device for an air-conditioning system provided by an embodiment of the present invention.

[0060] Reference numerals:

[0061] 1-condenser; 2-compressor; 3-refrigeration terminal module; 31-gas pipe; 311-check valve; 32-evaporator; 33-liquid pipe; 331-stop valve; 332-throttling element; 4-temperature detection module; 5-refrigerant monitoring module; 61-first shut-off valve; 62-second shut-off valve. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0063] In the field of computer room air conditioning, multi-split air conditioners are widely used due to their advantages such as rapid deployment and easy maintenance. Multi-split air conditioners generally rely on multiple refrigeration terminals to work together and utilize refrigerant for cooling. Because there are so many refrigeration terminals, refrigerant leaks in some of them can, over long periods of operation, cause all terminals to lose their cooling capacity, affecting the air conditioner's operation.

[0064] Based on the above problems, an embodiment of the present invention provides an air conditioning system, such as Figure 1As shown, it includes: a condenser 1, a compressor 2 and at least one refrigeration terminal module 3, wherein the condenser 1, the compressor 2 and each refrigeration terminal module 3 are sequentially connected through pipelines to form a loop; each refrigeration terminal module 3 includes a gas pipe 31, an evaporator 32 and a liquid pipe 33 connected in sequence, wherein the gas pipe 31 and the evaporator 32 can be connected by a flexible pipe (flexible pipe connection shown in the figure) or by a non-flexible pipe, and the liquid pipe 33 and the evaporator 32 can be connected by a flexible pipe (flexible pipe connection shown in the figure) or by a non-flexible pipe. The air conditioning system also includes:

[0065] A refrigerant monitoring module 5 corresponding to each refrigeration terminal module 3 is used to monitor the refrigerant leakage of each refrigeration terminal module 3;

[0066] A temperature detection module 4 corresponding to each refrigeration terminal module 3 is used to detect the temperature of each refrigeration terminal module 3;

[0067] A controller (not shown) is connected to the compressor 2, each refrigerant monitoring module 5 and each temperature detection module 4, respectively, for:

[0068] According to the refrigerant monitoring module 5 that sends the refrigerant leakage amount, the refrigeration terminal module 3 that leaks refrigerant is determined as the target refrigeration terminal module 3;

[0069] For each target refrigeration terminal module 3, the heat load of the target refrigeration terminal module 3 is determined according to the rotation speed of the compressor 2 or the temperature of the target refrigeration terminal module 3, and the leakage rate of the target refrigeration terminal module 3 is determined according to the refrigerant leakage amount of the target refrigeration terminal module 3;

[0070] Determine the shutdown priority of each target refrigeration terminal module 3 according to the heat load and leakage rate of each target refrigeration terminal module 3;

[0071] According to the shutdown priority, the passage between the target refrigeration terminal module 3 and the condenser 1 is disconnected in sequence at preset time intervals.

[0072] An air conditioning system provided in an embodiment of the present invention includes: a condenser 1, a compressor 2, and at least one refrigeration terminal module 3. By providing a temperature detection module 4 for detecting temperature and a refrigerant monitoring module 5 for monitoring refrigerant leakage in each refrigeration terminal module 3, the heat load and leakage rate of each target refrigeration terminal module 3 leaking refrigerant are determined, and the passage between the target refrigeration terminal module 3 and the condenser 1 is sequentially disconnected based on the heat load and leakage rate. Because the present invention sequentially disconnects the passage between the target refrigeration terminal module 3 and the condenser 1 based on the heat load and refrigerant leakage rate of the target refrigeration terminal module 3, a sudden drop in cooling effect due to simultaneous disconnection of all target refrigeration terminal modules 3 is avoided. Therefore, the risk of refrigerant leakage in the refrigeration terminal module 3 can be reduced while ensuring smooth operation of the air conditioning refrigeration system, thereby improving the performance of the air conditioning system.

[0073] In implementation, Figure 1 As shown, a refrigerant monitoring module 5 can be provided at the outlet of the gas pipe 31 of the refrigeration terminal module 3. The amount of refrigerant monitored by the refrigerant monitoring module 5 can be the amount of refrigerant per unit time, that is, the leakage rate of the refrigerant.

[0074] The location of the refrigerant monitoring module 5 in the embodiment of the present invention can be any location of the refrigeration terminal module 3, not limited to Figure 1 The position shown in FIG. 3 may also be other positions. As long as it is a setting position of the refrigerant monitoring module 5 that can monitor the refrigerant leakage amount of the refrigeration terminal module 3, the embodiment of the present invention is applicable.

[0075] In practice, the temperature detection module 4 in the embodiment of the present invention can be set at any position of the refrigeration terminal module 3, such as Figure 1 As shown, in the embodiment of the present invention, the temperature detection module 4 is arranged at the outlet of the air pipe 31. Similarly, the temperature detection module 4 provided in the embodiment of the present invention is not limited to Figure 1 The position shown in FIG. 3 may be any other position. As long as it is a setting position of the temperature detection module 4 that can detect the temperature of the air around the refrigeration terminal module, the embodiment of the present invention is applicable.

[0076] In a specific implementation, the air conditioning system in the embodiment of the present invention may further include a stop valve 331 corresponding to each refrigeration terminal module 3, and a one-way valve 311 corresponding to each refrigeration terminal module 3, such as Figure 2 shown.

[0077] For each refrigeration terminal module 3 , a stop valve 331 is provided on the liquid pipe 33 of the refrigeration terminal module 3 , and a one-way valve 311 is provided on the gas pipe 31 of the refrigeration terminal module 3 .

[0078] The controller is connected to the stop valve 331 and is used to control the stop valve 331 to close, so as to cut off the passage between the target refrigeration terminal module 3 and the condenser 1 .

[0079] In a specific implementation, the controller determines the shutdown priority of each target refrigeration terminal module 3 based on the heat load of each target refrigeration terminal module 3 and the leakage rate of the refrigerant. According to the shutdown priority, the stop valve 331 of each target refrigeration terminal module 3 is disconnected in turn at intervals of preset time, thereby reducing the leakage of refrigerant while ensuring the smooth operation of the air-conditioning refrigeration.

[0080] The preset time interval can be set according to actual conditions, for example, it can be 5 minutes, which is not limited here.

[0081] The one-way valve 311 provided in the embodiment of the present invention can prevent the refrigerant of the air-conditioning system from flowing into the flexible pipes and evaporator 32 in each refrigeration terminal module 3 due to its one-way flow characteristics. Since the risk of refrigerant leakage in the flexible pipes and evaporator 32 is relatively high, the setting of the one-way valve 311 can effectively reduce the amount of refrigerant leakage.

[0082] In another embodiment, Figure 3 As shown, the liquid pipe 33 module may also include a throttling element 332. The function of the throttling element 332 is throttling. The throttling element 332 is connected to the controller. The controller can control the throttling size of the throttling element 332. For example, a refrigerant circulation concentration can be pre-set. When the refrigerant concentration is lower than the preset circulation concentration, the controller can control the throttling element 332 to increase the opening. When the refrigerant concentration is higher than the preset circulation concentration, the controller can control the throttling element 332 to reduce the opening, so that the refrigerant can maintain a stable circulation concentration during the circulation process.

[0083] In another embodiment, Figure 4 As shown, a first shut-off valve 61 can be further provided between each refrigeration terminal module 3 and the condenser 1, and a second shut-off valve 62 can be further provided between each refrigeration terminal module 3 and the compressor 2. The first shut-off valve 61 and the second shut-off valve 62 can be used in conjunction with each other. When the first shut-off valve 61 and the second shut-off valve 62 are shut off at the same time, the refrigeration terminal module 3 can be quickly deployed and maintained.

[0084] Each refrigeration terminal module 3 in the embodiment of the present invention is provided with a refrigerant monitoring module 5, which can monitor the refrigerant leakage amount of each refrigeration terminal module 3. As long as there is refrigerant leakage in the refrigeration terminal module 3, it can be detected by the refrigerant monitoring module 5. After the refrigerant monitoring module 5 sends the monitored amount of refrigerant per unit time to the controller, the controller can determine the leakage rate of the refrigerant in each target refrigeration terminal module 3 based on the received amount of refrigerant per unit time.

[0085] The air conditioning system in the embodiment of the present invention can determine the shutdown priority of each target refrigeration terminal module 3 based on the heat load and refrigerant leakage rate of each target refrigeration terminal module 3. Based on the shutdown priority, the passage between the target refrigeration terminal module 3 and the condenser 1 is sequentially disconnected at preset time intervals. The purpose of sequentially disconnecting the target refrigeration terminal modules 3 is to ensure smooth operation of the air conditioner and avoid a situation where too many target refrigeration terminal modules 3 would cause a large-scale shutdown of the air conditioner if disconnected simultaneously, resulting in a sudden drop in cooling capacity, making the air conditioner unstable and affecting the cooling effect. Similarly, the heat load of each refrigeration terminal module 3 also affects the cooling effect. The lower the air temperature around the target refrigeration terminal module 3, that is, the lower the heat load, the smaller the impact of shutting down the corresponding target refrigeration terminal module 3 on the cooling effect. Therefore, the air conditioning system in the embodiment of the present invention determines the shutdown priority based on the heat load and leakage rate. Based on the shutdown priority, the passage between the target refrigeration terminal module 3 and the condenser 1 is sequentially disconnected at preset time intervals, thereby ensuring smooth operation of the air conditioner while reducing refrigerant leakage.

[0086] In one embodiment, the controller is further used to: if the speed of the compressor 2 is greater than or equal to a speed threshold, or the temperature of the target refrigeration terminal module 3 is greater than or equal to a temperature threshold, determine that the heat load of the target refrigeration terminal module 3 is a high heat load; otherwise, determine that the heat load of the target refrigeration terminal module 3 is a low heat load.

[0087] Specifically, the controller can obtain the rotational speed of the compressor 2, and judge the heat load of the target refrigeration terminal module 3 based on the obtained rotational speed of the compressor 2. If the rotational speed of the compressor 2 is greater than or equal to the rotational speed threshold, the heat load of all the target refrigeration terminal modules 3 is a high heat load; otherwise, the heat load of all the target refrigeration terminal modules 3 is a low heat load; the controller can also obtain the temperature detected by the temperature detection module 4 in each target refrigeration terminal module 3, and judge the heat load of the target refrigeration terminal module 3 based on the obtained temperature. If the temperature is greater than or equal to the temperature threshold, it is determined that the heat load of the corresponding target refrigeration terminal module 3 is a high heat load, otherwise it is a low heat load.

[0088] It should be noted that, when determining the heat load of the target refrigeration terminal module 3 , the controller can select one of the two: the speed of the compressor and the temperature in each target refrigeration terminal module 3 . The specific selection can be determined based on actual conditions.

[0089] In implementation, the controller can determine the shutdown priority of each target refrigeration terminal module 3, and disconnect the path between each target refrigeration terminal module 3 and the condenser 1 in turn according to the shutdown priority. The shutdown priority can be determined in two steps:

[0090] 1. In the target refrigeration terminal module 3 with a low heat load, the shutdown priority of the target refrigeration terminal module 3 is determined according to the order of leakage rate from large to small;

[0091] 2. In the target refrigeration terminal module 3 with a high heat load, the shutdown priority information is calculated according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, the preset temperature weight and the preset speed weight, and the shutdown priority of the target refrigeration terminal module is determined in descending order according to the calculated shutdown priority information.

[0092] The embodiment of the present invention determines the shutdown priority of the target refrigeration terminal module 3, and disconnects the target refrigeration terminal modules 3 in sequence according to the shutdown priority, so as to ensure the smooth operation of the air conditioner, avoid the phenomenon of large-scale shutdown of the air conditioner due to too many target refrigeration terminal modules 3 being shut down at the same time, thereby causing a sudden drop in cooling capacity, making it impossible for the air conditioner to run smoothly, and affecting the cooling effect; in addition, the heat load of each target refrigeration terminal module 3 will also affect the cooling effect. The lower the air temperature around the target refrigeration terminal module 3, that is, the lower the heat load, the smaller the impact of shutting down the corresponding target refrigeration terminal module 3 on the cooling effect. Therefore, the air-conditioning system in the embodiment of the present invention determines the shutdown priority according to the heat load and the leakage rate, and disconnects the path between the target refrigeration terminal module 3 and the condenser 1 in sequence according to the shutdown priority, thereby reducing the leakage of refrigerant while ensuring the smooth operation of the air-conditioning refrigeration, thereby improving the performance of the air-conditioning system.

[0093] For example, there are 10 target refrigeration terminal modules in total, of which the heat loads of 4 target refrigeration terminals are low heat loads, and the heat loads of the other 6 target refrigeration terminal modules are high heat loads. First, a shutdown priority is determined based on the descending order of the leakage rates of the four target refrigeration terminal modules with a low heat load. Based on the shutdown priority, the shut-off valves corresponding to the four target refrigeration terminal modules are sequentially opened at preset time intervals. Then, for the six target refrigeration terminal modules with a high heat load, shutdown priority information is calculated based on the temperatures, leakage rates, preset temperature weights, and preset speed weights of the six target refrigeration terminal modules. The preset temperature weight and speed weight can be set according to actual conditions. For example, the weight of the reciprocal of the temperature can be set to 0.5, and the weight of the leakage rate can be set to 0.5. Then, the shutdown priority information is calculated as: reciprocal of temperature * 0.5 + leakage rate * 0.5. The embodiment of the present invention does not impose any limitation on this. The shutdown priority of the target refrigeration terminal module 3 is determined based on the calculated shutdown priority information in descending order. Based on the shutdown priority, the shut-off valves 331 corresponding to the six target refrigeration terminal modules 3 are sequentially opened at preset time intervals.

[0094] In practice, the controller can also be connected to an alarm module to trigger an alarm when a leak is detected in a refrigeration terminal module. For example, the alarm module can be a light emitting diode (LED). When no leak is detected, the LED lights up green, and when a leak is detected, the LED lights up red. Another example is an audio module that can play a harsh warning music when a leak occurs.

[0095] Based on the same inventive concept, the embodiment of the present invention further provides a control method for an air conditioning system. The implementation of the method can refer to the implementation of the above system, and the repeated parts will not be repeated. Figure 5 As shown, the method includes:

[0096] S501: Determine, based on a refrigerant monitoring module that transmits a refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; for each target refrigeration terminal module, determine a heat load of the target refrigeration terminal module based on a compressor speed or a temperature of the target refrigeration terminal module, and determine a leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; and determine a shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module;

[0097] S502: disconnect the path between the target refrigeration terminal module and the condenser in sequence at preset time intervals according to the shutdown priority.

[0098] Optionally, determining the heat load of the target refrigeration terminal module according to the rotation speed of the compressor or the temperature of the target refrigeration terminal module includes:

[0099] If the speed of the compressor is greater than or equal to the speed threshold, or the temperature is greater than or equal to the temperature threshold, it is determined that the heat load of the target refrigeration terminal module is a high heat load;

[0100] Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

[0101] Optionally, the method further includes:

[0102] Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

[0103] Optionally, the method further includes:

[0104] In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight;

[0105] The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

[0106] Based on the same inventive concept, the embodiment of the present invention further provides a control device for an air conditioning system. The implementation of the device can refer to the implementation of the above system, and the repeated parts will not be repeated. Figure 6 As shown, the device includes:

[0107] The determining unit 601 is configured to determine, based on the refrigerant monitoring module that transmits the refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; for each target refrigeration terminal module, determine the heat load of the target refrigeration terminal module based on the speed of the compressor or the temperature of the target refrigeration terminal module, and determine the leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; and determine the shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module;

[0108] The control unit 602 is configured to disconnect the path between the target refrigeration terminal module and the condenser in sequence at preset time intervals according to the shutdown priority.

[0109] Optionally, the determining unit 601 is further configured to:

[0110] If the speed of the compressor is greater than or equal to the speed threshold, or the temperature is greater than or equal to the temperature threshold, it is determined that the heat load of the target refrigeration terminal module is a high heat load;

[0111] Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

[0112] Optionally, the determining unit 601 is further configured to:

[0113] Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

[0114] Optionally, the determining unit 601 is further configured to:

[0115] In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight;

[0116] The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

[0117] An embodiment of the present invention provides an air-conditioning system, a control method and a control device, wherein the air-conditioning system includes: a condenser, a compressor and at least one refrigeration terminal module, wherein the condenser, the compressor and each refrigeration terminal module are sequentially connected through pipelines to form a loop; each refrigeration terminal module includes an air pipe, an evaporator and a liquid pipe connected in sequence, and the air-conditioning system further includes: a refrigerant monitoring module corresponding to each refrigeration terminal module, for monitoring the refrigerant leakage of each refrigeration terminal module; a temperature detection module corresponding to each refrigeration terminal module, for detecting the temperature of each refrigeration terminal module; a controller, respectively connected to the compressor, each refrigerant monitoring module and each The temperature detection module is connected and used to: determine the refrigeration terminal module leaking refrigerant as the target refrigeration terminal module based on the refrigerant monitoring module that sends the refrigerant leakage amount; for each target refrigeration terminal module, determine the heat load of the target refrigeration terminal module based on the rotation speed of the compressor or the temperature of the target refrigeration terminal module, and determine the leakage rate of the target refrigeration terminal module based on the refrigerant leakage amount of the target refrigeration terminal module; determine the shutdown priority of each target refrigeration terminal module based on the heat load and leakage rate of each target refrigeration terminal module; and disconnect the path between the target refrigeration terminal module and the condenser in sequence at preset time intervals based on the shutdown priority. Since the present invention disconnects the path between the target refrigeration terminal module and the condenser in sequence based on the heat load and leakage rate, the refrigeration effect will not drop suddenly due to disconnecting all the target refrigeration terminal modules at the same time. Therefore, the risk of refrigerant leakage in the refrigeration terminal module can be reduced while ensuring the smooth operation of the air conditioning refrigeration, thereby improving the performance of the air conditioning system.

[0118] Those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

Claims

1. An air conditioning system, characterized in that: include: A condenser, a compressor, and at least one refrigeration terminal module, wherein the condenser, the compressor, and each refrigeration terminal module are sequentially connected through pipelines to form a loop; each refrigeration terminal module includes an air pipe, an evaporator, and a liquid pipe connected in sequence, and the air conditioning system further includes: A refrigerant monitoring module corresponding to each refrigeration terminal module is used to monitor the refrigerant leakage of each refrigeration terminal module; A temperature detection module corresponding to each refrigeration terminal module, used to detect the temperature of each refrigeration terminal module; A controller is connected to the compressor, each refrigerant monitoring module and each temperature detection module, and is used to: According to the refrigerant monitoring module that sends the refrigerant leakage amount, the refrigeration terminal module that leaks the refrigerant is determined as the target refrigeration terminal module; For each target refrigeration terminal module, determining a heat load of the target refrigeration terminal module according to a rotation speed of the compressor or a temperature of the target refrigeration terminal module, and determining a leakage rate of the target refrigeration terminal module according to a refrigerant leakage amount of the target refrigeration terminal module; Determining a shutdown priority of each target refrigeration terminal module according to a heat load and a leakage rate of each target refrigeration terminal module; According to the shutdown priority, the passage between the target refrigeration terminal module and the condenser is sequentially disconnected at preset time intervals.

2. The air conditioning system according to claim 1, wherein: Also included is a shut-off valve corresponding to each refrigeration terminal module; For each refrigeration terminal module, the shut-off valve is provided on the liquid pipe of the refrigeration terminal module; The controller is connected to the stop valve and is used to control the stop valve to close so as to disconnect the passage between the target refrigeration terminal module and the condenser.

3. The air conditioning system according to claim 1, wherein: Also included is a one-way valve corresponding to each refrigeration terminal module; For each refrigeration terminal module, the one-way valve is arranged on the air pipe of the refrigeration terminal module.

4. The air conditioning system according to claim 1, wherein: Also included is a throttling element corresponding to each refrigeration terminal module; For each refrigeration terminal module, the throttling element is arranged on the liquid pipe of the refrigeration terminal module; The controller is connected to the throttling element and is used to increase the opening of the throttling element when the refrigerant concentration is lower than the preset circulation concentration, and to reduce the opening of the throttling element when the refrigerant concentration is higher than the preset circulation concentration.

5. The air conditioning system according to claim 1, wherein: Also included are a first shutoff valve and a second shutoff valve; The first shut-off valve is arranged between the condenser and each of the refrigeration terminal modules, and the second shut-off valve is arranged between the compressor and each of the refrigeration terminal modules.

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: The controller is also used to: If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load; Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

7. The air conditioning system according to claim 6, wherein: The controller is also used to: Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

8. The air conditioning system according to claim 6, wherein: The controller is also used to: In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight; The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

9. A method for controlling an air conditioning system, characterized in that: Applied to the air conditioning system according to any one of claims 1 to 8, the method comprises: According to the refrigerant monitoring module that sends the refrigerant leakage amount, the refrigeration terminal module that leaks the refrigerant is determined as the target refrigeration terminal module; For each target refrigeration terminal module, determining a heat load of the target refrigeration terminal module according to a rotation speed of the compressor or a temperature of the target refrigeration terminal module, and determining a leakage rate of the target refrigeration terminal module according to a refrigerant leakage amount of the target refrigeration terminal module; Determining a shutdown priority of each target refrigeration terminal module according to a heat load and a leakage rate of each target refrigeration terminal module; According to the shutdown priority, the passage between the target refrigeration terminal module and the condenser is sequentially disconnected at preset time intervals.

10. The method according to claim 9, wherein The determining the heat load of the target refrigeration terminal module according to the rotation speed of the compressor or the temperature of the target refrigeration terminal module includes: If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load; Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

11. The method according to claim 10, wherein Also includes: Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

12. The method according to claim 10, wherein Also includes: In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight; The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

13. A control device for an air conditioning system, characterized in that: Applicable to the air conditioning system according to any one of claims 1 to 8, the device comprises: a determination unit configured to determine, based on the refrigerant monitoring module that transmits the refrigerant leakage amount, a refrigeration terminal module leaking refrigerant as a target refrigeration terminal module; for each target refrigeration terminal module, determine, based on the rotation speed of the compressor or the temperature of the target refrigeration terminal module, a heat load of the target refrigeration terminal module, and determine, based on the refrigerant leakage amount of the target refrigeration terminal module, a leakage rate of the target refrigeration terminal module; and determine, based on the heat load and leakage rate of each target refrigeration terminal module, a shutdown priority of each target refrigeration terminal module; A control unit is used to disconnect the passage between the target refrigeration terminal module and the condenser in sequence at preset time intervals according to the shutdown priority.

14. The device according to claim 13, wherein The determining unit is further configured to: If the speed of the compressor is greater than or equal to a speed threshold, or the temperature is greater than or equal to a temperature threshold, determining that the heat load of the target refrigeration terminal module is a high heat load; Otherwise, it is determined that the heat load of the target refrigeration terminal module is a low heat load.

15. The device according to claim 14, wherein The determining unit is further configured to: Among the target refrigeration terminal modules with a low heat load, the shutdown priority of the target refrigeration terminal modules is determined according to the order of leakage rate from large to small.

16. The device according to claim 14, wherein The determining unit is further configured to: In a target refrigeration terminal module with a high heat load, calculating shutdown priority information according to the temperature of the target refrigeration terminal module, the leakage rate of the target refrigeration terminal module, a preset temperature weight, and a preset rate weight; The shutdown priority of the target refrigeration terminal module is determined according to the calculated shutdown priority information in descending order.

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