CN116817410A - Air conditioning system, control method and control device - Google Patents
Air conditioning system, control method and control device Download PDFInfo
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- CN116817410A CN116817410A CN202210276587.3A CN202210276587A CN116817410A CN 116817410 A CN116817410 A CN 116817410A CN 202210276587 A CN202210276587 A CN 202210276587A CN 116817410 A CN116817410 A CN 116817410A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 111
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000005057 refrigeration Methods 0.000 claims description 155
- 239000007788 liquid Substances 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The embodiment of the application provides an air conditioning system, a control method and a control device, wherein the air conditioning system comprises a condenser, a compressor and at least one refrigerating end module, a temperature detection module for detecting temperature and a refrigerant monitoring module for monitoring leakage amount of refrigerant are arranged on each refrigerating end module, the heat load of each target refrigerating end module for leakage of refrigerant and the leakage speed of the refrigerant are determined, and a passage between the target refrigerating end module and the condenser is sequentially disconnected according to the heat load and the leakage speed. According to the application, the paths between the target refrigerating end modules and the condenser are sequentially disconnected according to the heat load and the leakage speed, so that the sudden drop of the refrigerating effect caused by simultaneously disconnecting all the target refrigerating end modules is avoided, the stable operation of the air conditioner refrigerating can be ensured, the risk of leakage of the refrigerant in the refrigerating end modules is reduced, and the performance of the air conditioning system can be improved.
Description
Technical Field
The present application relates to the field of air conditioning technologies, and in particular, to an air conditioning system, a control method, and a control device.
Background
At present, in the field of machine room air conditioning, multi-connected air conditioning has been gradually applied because multi-connected air conditioning has the advantages of being capable of being rapidly deployed, reducing local hot spots and the like.
The application risk of the multi-connected air conditioner is that the number of the refrigerating terminals is large, and if some of the refrigerating terminals leak refrigerant, the refrigerating terminals of the whole air conditioning system may lose refrigerating capacity after long-term operation.
Therefore, how to reduce the risk of leakage of air conditioning refrigerant is a problem that the skilled person is urgent to solve.
Disclosure of Invention
The embodiment of the application provides an air conditioning system, a control method and a control device, which are used for solving the problem of air conditioning faults caused by refrigerant leakage of a machine room air conditioner in the prior art.
In a first aspect, an embodiment of the present application provides an air conditioning system, including: the system comprises a condenser, a compressor and at least one refrigeration end module, wherein the condenser, the compressor and each refrigeration end module are sequentially connected through pipelines, and a loop is formed; each refrigeration end module comprises an air pipe, an evaporator and a liquid pipe which are sequentially connected, and the air conditioning system further comprises:
a refrigerant monitoring module corresponding to each of the refrigerating end modules for monitoring a refrigerant leakage amount of each of the refrigerating end modules;
the temperature detection module is corresponding to each refrigerating end module and is used for detecting the temperature of each refrigerating end module;
and a controller, respectively connected with the compressor, each refrigerant monitoring module and each temperature detection module, for:
according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals.
In one possible implementation, the system further comprises a stop valve corresponding to each refrigeration end module;
for each refrigerating end module, the stop valve is arranged on a liquid pipe of the refrigerating end module;
the controller is connected with the stop valve and is used for controlling the stop valve to be closed so as to disconnect a passage between the target refrigeration end module and the condenser.
In one possible implementation, the refrigeration system further comprises a check valve corresponding to each refrigeration end module;
for each refrigeration end module, the one-way valve is arranged on the air pipe of the refrigeration end module.
In one possible implementation, the cooling system further comprises a throttling element corresponding to each cooling end module;
for each refrigeration end module, the throttling element is arranged on a liquid pipe of the refrigeration end module;
the controller is connected with the throttling element and is used for increasing the opening of the throttling element when the concentration of the refrigerant is lower than the preset circulating concentration and decreasing the opening of the throttling element when the concentration of the refrigerant is higher than the preset circulating concentration.
In one possible implementation, the valve further comprises a first shut-off valve and a second shut-off valve;
the first shut-off valve is disposed between the condenser and each of the refrigeration end modules, and the second shut-off valve is disposed between the compressor and each of the refrigeration end modules.
In one possible implementation, the controller is further configured to:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
In one possible implementation, the controller is further configured to:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
In one possible implementation, the controller is further configured to:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
In a second aspect, an embodiment of the present application further provides a control method of an air conditioning system, which is applied to any one of the air conditioning systems in the first aspect, where the method includes:
according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals.
In one possible implementation, the determining the thermal load of the refrigeration end module according to the rotation speed of the compressor or the temperature of the refrigeration end module includes:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
In one possible implementation, the method further includes:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
In one possible implementation, the method further includes:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
In a third aspect, an embodiment of the present application further provides a control device for an air conditioning system, which is applied to any one of the air conditioning systems in the first aspect, where the device includes:
a determining unit for determining, according to the refrigerant monitoring module that transmits the leakage amount of the refrigerant, that the refrigerating end module of the leaked refrigerant is a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and the control unit is used for sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals according to the turn-off priority.
In a possible implementation, the determining unit is further configured to:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
In a possible implementation, the determining unit is further configured to:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
In a possible implementation, the determining unit is further configured to:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
The embodiment of the application provides an air conditioning system, a control method and a control device, wherein the air conditioning system comprises: the refrigerating system comprises a condenser, a compressor and at least one refrigerating end module, wherein the condenser, the compressor and each refrigerating end module are sequentially connected through pipelines and form a loop; each refrigeration end module comprises an air pipe, an evaporator and a liquid pipe which are sequentially connected, and the air conditioning system further comprises: a refrigerant monitoring module corresponding to each of the refrigerating end modules for monitoring a refrigerant leakage amount of each of the refrigerating end modules; the temperature detection module is corresponding to each refrigerating end module and is used for detecting the temperature of each refrigerating end module; and the controller is respectively connected with the compressor, each refrigerant monitoring module and each temperature detection module and is used for: according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the turn-off priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module; and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals. According to the application, the paths between the target refrigerating end modules and the condenser are sequentially disconnected according to the heat load of the target refrigerating end modules and the leakage speed of the refrigerant, so that the sudden drop of the refrigerating effect caused by simultaneously disconnecting all the target refrigerating end modules is avoided, the stable operation of the air conditioner refrigerating can be ensured, the risk of refrigerant leakage in the refrigerating end modules is reduced, and the performance of the air conditioning system can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another air conditioning system according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of another air conditioning system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another air conditioning system according to an embodiment of the present application;
fig. 5 is a schematic flow chart of a control method of an air conditioning system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a control device of an air conditioning system according to an embodiment of the present application.
Reference numerals:
1-a condenser; a 2-compressor; 3-a refrigerated end module; 31-trachea; 311-a one-way valve; a 32-evaporator; 33-liquid tube; 331-a shut-off valve; 332-a throttling element; 4-a temperature detection module; 5-a refrigerant monitoring module; 61-a first shut-off valve; 62-second shut-off valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
In the field of machine room air conditioning, the multi-connected air conditioner is widely applied due to the advantages of quick deployment, convenient maintenance and the like. For multi-connected air conditioners, a plurality of refrigeration terminals commonly act together to utilize a refrigerant for refrigeration, and if some of the refrigeration terminals leak the refrigerant, all the refrigeration terminals may lose refrigeration capacity after long-term operation, so that the operation of the air conditioner is affected.
Based on the above-mentioned problems, an embodiment of the present application provides an air conditioning system, as shown in fig. 1, including: the condenser 1, the compressor 2 and at least one refrigeration end module 3, wherein the condenser 1, the compressor 2 and each refrigeration end module 3 are connected in sequence through pipelines and form a loop; each refrigeration end module 3 includes an air pipe 31, an evaporator 32, and a liquid pipe 33 connected in sequence, wherein the air pipe 31 and the evaporator 32 may be connected by a flexible pipe (illustrated as a flexible pipe connection), or may be connected by an inflexible pipe, the liquid pipe 33 and the evaporator 32 may be connected by a flexible pipe (illustrated as a flexible pipe connection), or may be connected by an inflexible pipe, and the air conditioning system further includes:
a refrigerant monitoring module 5 corresponding to each of the refrigerating end modules 3 for monitoring a refrigerant leakage amount of each of the refrigerating end modules 3;
a temperature detection module 4 corresponding to each cooling end module 3 for detecting a temperature of each cooling end module 3;
a controller (not shown in the drawings) connected to the compressor 2, each refrigerant monitoring module 5 and each temperature detecting module 4, respectively, for:
according to the refrigerant monitoring module 5 which sends the leakage amount of the refrigerant, determining the refrigerating end module 3 of the leaked refrigerant as a target refrigerating end module 3;
for each target refrigerating end module 3, determining a heat load of the target refrigerating end module 3 according to a rotation speed of the compressor 2 or a temperature of the target refrigerating end module 3, and determining a leakage speed of the target refrigerating end module 3 according to a refrigerant leakage amount of the target refrigerating end module 3;
determining the shutdown priority of each target refrigeration end module 3 according to the heat load and the leakage speed of each target refrigeration end module 3;
the paths between the target cooling end module 3 and the condenser 1 are sequentially disconnected at preset time intervals according to the shutdown priority.
The air conditioning system provided by the embodiment of the application comprises: the condenser 1, the compressor 2 and at least one refrigerating end module 3, the heat load and the leakage speed of each target refrigerating end module 3 leaking the refrigerant are determined by providing a temperature detection module 4 for detecting the temperature and a refrigerant monitoring module 5 for monitoring the leakage amount of the refrigerant at each refrigerating end module 3, and the passage between the target refrigerating end module 3 and the condenser 1 is sequentially opened according to the heat load and the leakage speed. According to the application, the paths between the target refrigerating end modules 3 and the condenser 1 are sequentially disconnected according to the heat load of the target refrigerating end modules 3 and the leakage speed of the refrigerant, so that the refrigerating effect is not suddenly reduced due to the simultaneous disconnection of all the target refrigerating end modules 3, the risk of refrigerant leakage in the refrigerating end modules 3 can be reduced while the stable operation of the air conditioner refrigerating is ensured, and the performance of an air conditioning system can be improved.
In practice, as shown in fig. 1, the refrigerant monitoring module 5 may be disposed at the outlet of the air pipe 31 of the refrigeration terminal module 3, and the amount of the refrigerant monitored by the refrigerant monitoring module 5 may be the amount of the refrigerant per unit time, that is, the leakage rate of the refrigerant.
The position where the refrigerant monitoring module 5 in the embodiment of the present application is provided may be any position of the refrigeration terminal module 3, not only limited to the position shown in fig. 1, but also other positions, as long as the position where the refrigerant monitoring module 5 is provided, which can monitor the refrigerant leakage amount of the refrigeration terminal module 3, is applicable to the embodiment of the present application.
In practice, the temperature detection module 4 in the embodiment of the present application may be disposed at any position of the cooling end module 3, as shown in fig. 1, and in the embodiment of the present application, the temperature detection module 4 is disposed at the outlet of the air pipe 31. Similarly, the temperature detection module 4 provided in the embodiment of the present application is not limited to the position shown in fig. 1, and other positions may be used as long as the position of the temperature detection module 4 is a position where the temperature of the air around the cooling end module can be detected.
In a specific implementation, the air conditioning system according to an embodiment of the present application may further include a stop valve 331 corresponding to each cooling end module 3, and a check valve 311 corresponding to each cooling end module 3, as shown in fig. 2.
For each cooling end module 3, a shut-off valve 331 is provided on the liquid pipe 33 of the cooling end module 3, and a check valve 311 is provided on the air pipe 31 of the cooling end module 3.
The controller is connected to the shut-off valve 331 for controlling the shut-off valve 331 to be closed to disconnect the passage between the target cooling end module 3 and the condenser 1.
In a specific implementation, the controller determines the shutdown priority of each target refrigeration end module 3 according to the heat load of each target refrigeration end module 3 and the leakage speed of the refrigerant, and sequentially disconnects the stop valve 331 of each target refrigeration end module 3 at preset time intervals according to the shutdown priority, so that the leakage of the refrigerant can be reduced while ensuring the stable operation of the air conditioner refrigeration.
The preset time interval may be set according to practical situations, for example, may be 5 minutes, which is not limited herein.
The unidirectional valve 311 provided in the embodiment of the present application can avoid the refrigerant of the air conditioning system flowing into the flexible pipeline and the evaporator 32 in each refrigeration end module 3 due to the unidirectional circulation characteristic thereof, and the leakage amount of the refrigerant can be effectively reduced due to the arrangement of the unidirectional valve 311 because the risk of leakage of the refrigerant between the flexible pipeline and the evaporator 32 is relatively high.
In another embodiment, as shown in fig. 3, the liquid tube 33 module may further include a throttling element 332, where the throttling element 332 is used to throttle, and the throttling element 332 is connected to a controller, where the controller may control the throttling size of the throttling element 332, for example, may preset a circulating concentration of the refrigerant, and when the concentration of the refrigerant is lower than the preset circulating concentration, the controller may control the throttling element 332 to increase the opening, and when the concentration of the refrigerant is higher than the preset circulating concentration, the controller may control the throttling element 332 to decrease the opening, so that the circulating concentration of the refrigerant may be kept stable during the circulating process.
In another embodiment, as shown in fig. 4, a first shut-off valve 61 may be further disposed between each refrigeration end module 3 and the condenser 1, and a second shut-off valve 62 may be further disposed between each refrigeration end module 3 and the compressor 2, and the first shut-off valve 61 and the second shut-off valve 62 may be used in combination, so that rapid deployment and maintenance of the refrigeration end modules 3 may be performed when the first shut-off valve 61 and the second shut-off valve 62 are simultaneously shut-off.
In the embodiment of the present application, each refrigeration end module 3 is provided with a refrigerant monitoring module 5, and the refrigerant monitoring module 5 can monitor the leakage amount of the refrigerant of each refrigeration end module 3, so long as the refrigeration end module 3 leaks, the refrigerant monitoring module 5 can monitor the leakage amount of the refrigerant, and after the refrigerant monitoring module 5 sends the monitored refrigerant amount in unit time to the controller, the controller can determine the leakage speed of the refrigerant of each target refrigeration end module 3 according to the received refrigerant amount in unit time.
The air conditioning system in the embodiment of the application can determine the turn-off priority of each target refrigeration end module 3 according to the heat load of each target refrigeration end module 3 and the leakage speed of the refrigerant, and sequentially disconnect the paths between the target refrigeration end modules 3 and the condenser 1 at preset time intervals according to the turn-off priority. The target refrigerating end modules 3 are disconnected in sequence to ensure that the air conditioner can stably run, so that the situation that the air conditioner is stopped on a large scale due to the fact that the target refrigerating end modules 3 are too many and the refrigerating capacity suddenly drops due to the fact that the air conditioner is disconnected at the same time is avoided, and the refrigerating effect is affected; similarly, the heat load of each refrigeration end module 3 also affects the refrigeration effect, and the lower the air temperature around the target refrigeration end module 3, i.e. the lower the heat load, the smaller the influence on the refrigeration effect by closing the corresponding target refrigeration end module 3 is, so that the air conditioning system in the embodiment of the application determines the shutdown priority according to the heat load and the leakage speed, and sequentially disconnects the passage between the target refrigeration end module 3 and the condenser 1 at preset time intervals according to the shutdown priority, thereby reducing the leakage of the refrigerant while ensuring the stable operation of the air conditioning refrigeration.
In one embodiment, the controller is further configured to: if the rotation speed of the compressor 2 is greater than or equal to the rotation speed threshold value or the temperature of the target refrigeration end module 3 is greater than or equal to the temperature threshold value, determining that the heat load of the target refrigeration end module 3 is high heat load; otherwise, the heat load of the target cooling end module 3 is determined to be a low heat load.
Specifically, the controller may obtain the rotation speed of the compressor 2, determine the heat load of the target refrigeration end modules 3 according to the obtained rotation speed of the compressor 2, if the rotation speed of the compressor 2 is greater than or equal to the rotation speed threshold, the heat loads of all the target refrigeration end modules 3 are high heat loads, otherwise, the heat loads of all the target refrigeration end modules 3 are low heat loads; the controller may further obtain the temperature detected by the temperature detection module 4 in each target refrigeration end module 3, determine the thermal load of the target refrigeration end module 3 according to the obtained temperature, and determine that the thermal load of the corresponding target refrigeration end module 3 is a high thermal load if the temperature is greater than or equal to the temperature threshold, or is a low thermal load if the temperature is not greater than the temperature threshold.
The controller may optionally select one of the rotation speed of the compressor and the temperature in each target cooling end module 3 when judging the heat load of the target cooling end module 3, and may specifically determine which one to select according to the actual situation.
In implementation, the controller may determine the shutdown priority of each target refrigeration end module 3, and sequentially disconnect the path between each target refrigeration end module 3 and the condenser 1 according to the shutdown priority, and specifically may divide the determination of the shutdown priority into two steps:
1. in the target refrigerating end module 3 with low heat load, determining the turn-off priority of the target refrigerating end module 3 according to the sequence from the high leakage speed to the low leakage speed;
2. in the target refrigeration end module 3 with high heat load, according to the temperature of the target refrigeration end module, the leakage speed of the target refrigeration end module, the preset temperature weight and the preset speed weight, the shutdown priority information is calculated, and according to the sequence of the calculated shutdown priority information from large to small, the shutdown priority of the target refrigeration end module is determined.
According to the embodiment of the application, the shutdown priority of the target refrigeration tail end module 3 is determined, and the target refrigeration tail end module 3 is sequentially disconnected according to the shutdown priority, so that the air conditioner can be ensured to run stably, the phenomenon that the air conditioner is shut down on a large scale due to the fact that the target refrigeration tail end module 3 is too many and the air conditioner is shut down simultaneously is avoided, so that the situation of suddenly falling refrigerating capacity is caused, the air conditioner cannot run stably, and the refrigerating effect is influenced; in addition, the heat load of each target refrigerating end module 3 also affects the refrigerating effect, and the lower the air temperature around the target refrigerating end module 3, namely the lower the heat load, the smaller the influence of the turn-off of the corresponding target refrigerating end module 3 on the refrigerating effect is, so that the air conditioning system in the embodiment of the application determines the turn-off priority according to the heat load and the leakage speed, and sequentially cuts off the passage between the target refrigerating end module 3 and the condenser 1 according to the turn-off priority, thereby reducing the leakage of the refrigerant while ensuring the stable operation of the air conditioning, and improving the performance of the air conditioning system.
For example, there are 10 target cooling end modules in total, wherein the heat load of 4 target cooling ends is a low heat load and the heat load of the other 6 target cooling end modules is a high heat load. Firstly, determining a turn-off priority according to the sequence from big to small of the leakage speed of 4 target refrigerating end modules with low heat load, and sequentially turning off stop valves corresponding to the 4 target refrigerating end modules at preset time intervals according to the turn-off priority; then, in the 6 target refrigeration end modules with high heat load, according to the temperature, the leakage speed, the preset temperature weight and the preset speed weight of the 6 target refrigeration end modules, the shutdown priority information is calculated, the preset temperature weight and the preset speed weight can be set according to practical situations, for example, the inverse weight of the temperature can be set to be 0.5, the leakage speed weight is set to be 0.5, and the shutdown priority information calculating mode is as follows: the temperature is 0.5+0.5, and the embodiment of the present application does not limit this, determines the shutdown priority of the target refrigeration end modules 3 according to the order of the calculated shutdown priority information from large to small, and sequentially disconnects the stop valves 331 corresponding to the 6 target refrigeration end modules 3 at preset time intervals according to the shutdown priority.
In an implementation, the controller may also be connected to an alarm module, which alarms when it is determined that a certain refrigeration end module is leaking. For example, the alarm module may be a light emitting diode (Light Emitting Diode, LED), the LED light being green when no leakage is detected, the LED light being red when leakage is detected; for another example, the alarm module may be an audio module, so that when leakage occurs, the alarm module may play the harsh music with warning.
Based on the same inventive concept, the embodiment of the present application further provides a control method of an air conditioning system, where implementation of the method may refer to implementation of the above system, and details are not repeated, as shown in fig. 5, and the method includes:
s501, determining a refrigeration end module of leaked refrigerant as a target refrigeration end module according to a refrigerant monitoring module for sending the leakage amount of the refrigerant; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the turn-off priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
s502, according to the turn-off priority, sequentially cutting off the passage between the target refrigeration end module and the condenser at preset time intervals.
Optionally, determining the thermal load of the target refrigeration end module according to the rotational speed of the compressor or the temperature of the target refrigeration end module includes:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining the heat load of the target refrigerating end module as high heat load;
otherwise, the thermal load of the target refrigeration end module is determined to be a low thermal load.
Optionally, the method further comprises:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
Optionally, the method further comprises:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
Based on the same inventive concept, the embodiment of the present application further provides a control device of an air conditioning system, where implementation of the device can be referred to implementation of the above system, and details are not repeated, as shown in fig. 6, where the device includes:
a determining unit 601, configured to determine, according to a refrigerant monitoring module that sends a leakage amount of refrigerant, that a refrigeration end module of the leaked refrigerant is a target refrigeration end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the turn-off priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
the control unit 602 is configured to sequentially disconnect the paths between the target refrigeration end module and the condenser at preset time intervals according to the shutdown priority.
Optionally, the determining unit 601 is further configured to:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining the heat load of the target refrigerating end module as high heat load;
otherwise, the thermal load of the target refrigeration end module is determined to be a low thermal load.
Optionally, the determining unit 601 is further configured to:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
Optionally, the determining unit 601 is further configured to:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
The embodiment of the application provides an air conditioning system, a control method and a control device, wherein the air conditioning system comprises: the refrigerating system comprises a condenser, a compressor and at least one refrigerating end module, wherein the condenser, the compressor and each refrigerating end module are sequentially connected through pipelines and form a loop; each refrigeration end module comprises an air pipe, an evaporator and a liquid pipe which are sequentially connected, and the air conditioning system further comprises: a refrigerant monitoring module corresponding to each of the refrigerating end modules for monitoring a refrigerant leakage amount of each of the refrigerating end modules; the temperature detection module is corresponding to each refrigerating end module and is used for detecting the temperature of each refrigerating end module; and the controller is respectively connected with the compressor, each refrigerant monitoring module and each temperature detection module and is used for: according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the turn-off priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module; and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals. According to the application, the paths between the target refrigerating end modules and the condenser are sequentially disconnected according to the heat load and the leakage speed, so that the sudden drop of the refrigerating effect caused by simultaneously disconnecting all the target refrigerating end modules is avoided, the stable operation of the air conditioner refrigerating can be ensured, the risk of leakage of the refrigerant in the refrigerating end modules is reduced, and the performance of the air conditioning system can be improved.
Various modifications and alterations of this application may be made by those skilled in the art without departing from the spirit and scope of this application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (16)
1. An air conditioning system, comprising: the system comprises a condenser, a compressor and at least one refrigeration end module, wherein the condenser, the compressor and each refrigeration end module are sequentially connected through pipelines, and a loop is formed; each refrigeration end module comprises an air pipe, an evaporator and a liquid pipe which are sequentially connected, and the air conditioning system further comprises:
a refrigerant monitoring module corresponding to each of the refrigerating end modules for monitoring a refrigerant leakage amount of each of the refrigerating end modules;
the temperature detection module is corresponding to each refrigerating end module and is used for detecting the temperature of each refrigerating end module;
and a controller, respectively connected with the compressor, each refrigerant monitoring module and each temperature detection module, for:
according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module;
for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module;
determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals.
2. The air conditioning system of claim 1, further comprising a shut-off valve corresponding to each refrigerated end module;
for each refrigerating end module, the stop valve is arranged on a liquid pipe of the refrigerating end module;
the controller is connected with the stop valve and is used for controlling the stop valve to be closed so as to disconnect a passage between the target refrigeration end module and the condenser.
3. The air conditioning system of claim 1, further comprising a one-way valve corresponding to each refrigeration end module;
for each refrigeration end module, the one-way valve is arranged on the air pipe of the refrigeration end module.
4. The air conditioning system of claim 1, further comprising a throttling element corresponding to each refrigerated end module;
for each refrigeration end module, the throttling element is arranged on a liquid pipe of the refrigeration end module;
the controller is connected with the throttling element and is used for increasing the opening of the throttling element when the concentration of the refrigerant is lower than the preset circulating concentration and decreasing the opening of the throttling element when the concentration of the refrigerant is higher than the preset circulating concentration.
5. The air conditioning system of claim 1, further comprising a first shut-off valve and a second shut-off valve;
the first shut-off valve is disposed between the condenser and each of the refrigeration end modules, and the second shut-off valve is disposed between the compressor and each of the refrigeration end modules.
6. The air conditioning system of any of claims 1-5, wherein the controller is further configured to:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
7. The air conditioning system of claim 6, wherein the controller is further configured to:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
8. The air conditioning system of claim 6, wherein the controller is further configured to:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
9. A control method of an air conditioning system, applied to the air conditioning system of any one of claims 1 to 8, the method comprising:
according to the refrigerant monitoring module for sending the leakage amount of the refrigerant, determining the refrigerating end module of the leaked refrigerant as a target refrigerating end module;
for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module;
determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and according to the shutdown priority, sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals.
10. The method of claim 9, wherein said determining the thermal load of the target refrigeration end module based on the rotational speed of the compressor or the temperature of the target refrigeration end module comprises:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
11. The method as recited in claim 10, further comprising:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
12. The method as recited in claim 10, further comprising:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
13. A control device for an air conditioning system, characterized by being applied to an air conditioning system according to any one of claims 1 to 8, the device comprising:
a determining unit for determining, according to the refrigerant monitoring module that transmits the leakage amount of the refrigerant, that the refrigerating end module of the leaked refrigerant is a target refrigerating end module; for each target refrigerating end module, determining the heat load of the target refrigerating end module according to the rotating speed of the compressor or the temperature of the target refrigerating end module, and determining the leakage speed of the target refrigerating end module according to the leakage amount of the refrigerant of the target refrigerating end module; determining the shutdown priority of each target refrigeration end module according to the heat load and the leakage speed of each target refrigeration end module;
and the control unit is used for sequentially disconnecting the passages between the target refrigeration end module and the condenser at preset time intervals according to the turn-off priority.
14. The apparatus of claim 13, wherein the determining unit is further to:
if the rotating speed of the compressor is greater than or equal to a rotating speed threshold value or the temperature is greater than or equal to a temperature threshold value, determining that the heat load of the target refrigerating end module is high heat load;
otherwise, determining the heat load of the target refrigeration end module as a low heat load.
15. The apparatus of claim 14, wherein the determining unit is further to:
in the target refrigeration end module with low heat load, determining the turn-off priority of the target refrigeration end module according to the sequence from the high leakage speed to the low leakage speed.
16. The apparatus of claim 14, wherein the determining unit is further to:
in a target refrigerating end module with high heat load, calculating turn-off priority information according to the temperature of the target refrigerating end module, the leakage speed of the target refrigerating end module, a preset temperature weight and a preset speed weight;
and determining the shutdown priority of the target refrigeration end module according to the sequence from big to small of the calculated shutdown priority information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210276587.3A CN116817410A (en) | 2022-03-21 | 2022-03-21 | Air conditioning system, control method and control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210276587.3A CN116817410A (en) | 2022-03-21 | 2022-03-21 | Air conditioning system, control method and control device |
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| CN116817410A true CN116817410A (en) | 2023-09-29 |
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