CN109114778B - Multi-connected air conditioning system, control method and device thereof and readable storage medium - Google Patents
Multi-connected air conditioning system, control method and device thereof and readable storage medium Download PDFInfo
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- CN109114778B CN109114778B CN201810947843.0A CN201810947843A CN109114778B CN 109114778 B CN109114778 B CN 109114778B CN 201810947843 A CN201810947843 A CN 201810947843A CN 109114778 B CN109114778 B CN 109114778B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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Abstract
The invention discloses a multi-connected air conditioning system, which comprises at least one outdoor unit and a plurality of indoor units, and is characterized in that each indoor unit comprises a plurality of indoor heat exchangers connected in parallel and a plurality of electromagnetic valves, wherein the electromagnetic valves are respectively connected with inlets and outlets of the corresponding indoor heat exchangers; the multi-connected air conditioning system also comprises a controller, wherein the controller is used for controlling the opening and closing of the electromagnetic valves, so that when the electromagnetic valves are closed, the corresponding indoor heat exchangers forbid heat exchange operation, and the load of the multi-connected air conditioning system is reduced. The invention also discloses a control method and a control device of the multi-connected air conditioning system and a computer readable storage medium. The invention improves the operation reliability of the multi-connected air conditioning system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-connected air conditioner system, a control method and a control device of the multi-connected air conditioner system, and a readable storage medium.
Background
With the development of science and technology, multi-connected air conditioning systems are widely used, and include one or more outdoor units, and a plurality of indoor units, each of which includes an indoor heat exchanger for performing indoor heat exchange to realize heating/cooling. In some cases, when the system is overloaded, the outdoor unit is generally turned off to avoid the overloaded operation of the multi-connected air conditioning system, that is, the shutdown, which causes the multi-connected air conditioning system to be unable to continue cooling/heating, and therefore, the reliability of the operation of the multi-connected air conditioning system needs to be improved.
Disclosure of Invention
The invention mainly aims to provide a multi-connected air conditioning system, a control method and a device thereof, and a readable storage medium, and aims to solve the problem that the multi-connected air conditioning system in the prior art is low in operation reliability.
In order to achieve the above object, the present invention provides a multi-connected air conditioning system, which includes at least one outdoor unit and a plurality of indoor units, and is characterized in that the indoor units include a plurality of indoor heat exchangers connected in parallel, and a plurality of electromagnetic valves, and the plurality of electromagnetic valves are respectively connected to inlets and outlets of the corresponding indoor heat exchangers; the multi-connected air conditioning system also comprises a controller, wherein the controller is used for controlling the opening and closing of the electromagnetic valves, so that when the electromagnetic valves are closed, the corresponding indoor heat exchangers forbid heat exchange operation, and the load of the multi-connected air conditioning system is reduced.
Preferably, the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger, the solenoid valve comprises a first solenoid valve and a second solenoid valve, and an inlet and an outlet of the second indoor heat exchanger are respectively connected with the first solenoid valve and the second solenoid valve; the controller is used for controlling the first electromagnetic valve and the second electromagnetic valve to be opened or closed.
In addition, in order to achieve the above object, the present invention further provides a method for controlling a multi-connected air conditioning system, where the multi-connected air conditioning system is the multi-connected air conditioning system described above, and the method for controlling the multi-connected air conditioning system includes the following steps:
detecting the current running state information of the multi-connected air conditioning system;
determining the current suitable opening and closing state information of the electromagnetic valve according to the running state information;
and controlling the electromagnetic valve to open and close according to the opening and closing state information.
Preferably, the step of determining the currently suitable opening and closing state information of the electromagnetic valve according to the running state information comprises the following steps:
and when the running state information is low-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Preferably, the step of determining the currently suitable opening and closing state information of the electromagnetic valve according to the running state information comprises the following steps:
and when the running state information is high-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Preferably, when the operation state information is high-temperature refrigeration, the step of determining that the currently suitable opening and closing state information of the electromagnetic valve is closed includes:
when the running state information is high-temperature refrigeration, detecting the return air superheat degree of the multi-connected air conditioning system;
and when the return air superheat degree is larger than a preset superheat degree threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Preferably, the step of determining the currently suitable opening and closing state information of the electromagnetic valve according to the running state information comprises the following steps:
and when the running state information is heating and the heating time length is less than a preset time length threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Preferably, the step of determining the currently suitable opening and closing state information of the electromagnetic valve according to the running state information comprises the following steps:
and when the running state information is low-temperature heating, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
In addition, in order to achieve the above object, the present invention further provides a control device of a multi-connected air conditioning system, including: the system comprises a memory, a processor and a multi-connected air conditioning system control program which is stored on the memory and can run on the processor; the multi-connected air conditioning system control program, when executed by the processor, implements the steps of the control method of a multi-connected air conditioning system as described above.
Further, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon a multiple air conditioning system control program, which when executed by a processor, implements the steps of the control method of the multiple air conditioning system as described above.
According to the technical scheme, the indoor unit of the multi-connected air-conditioning system comprises a plurality of indoor heat exchangers, the inlet and the outlet of at least one indoor heat exchanger are connected with the electromagnetic valve, the opening and the closing of the electromagnetic valve are controlled according to the running condition of the multi-connected air-conditioning system, when the electromagnetic valve is opened, the corresponding indoor heat exchanger normally exchanges heat, and when the electromagnetic valve is closed, the corresponding indoor heat exchanger prohibits heat exchange, so that the load of the multi-connected air-conditioning system is reduced, the overload running of the multi-connected air-conditioning system is avoided, and the running reliability of the multi-connected air-conditioning system.
Drawings
Fig. 1 is a schematic structural diagram of an alternative multi-connected air conditioning system indoor unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative multi-connected air conditioning system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a multi-connected air conditioning system in a hardware operating environment according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of a multi-connected air conditioning system according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: the indoor unit of the multi-connected air-conditioning system comprises a plurality of indoor heat exchangers, an inlet and an outlet of at least one indoor heat exchanger are respectively connected with an electromagnetic valve, the opening and the closing of the electromagnetic valve are controlled according to the running condition of the multi-connected air-conditioning system, when the electromagnetic valve is opened, the corresponding indoor heat exchanger runs normally, and when the electromagnetic valve is closed, the corresponding indoor heat exchanger does not run, so that the load of the multi-connected air-conditioning system is reduced, and the multi-connected air-conditioning system does not need to be prevented from running in an overload mode through. By the technical scheme of the embodiment of the invention, the problem of low running reliability of the multi-connected air conditioning system is solved.
The embodiment of the invention provides a multi-connected air conditioning system.
In this embodiment, the multi-connected air conditioning system is composed of a plurality of indoor units and at least one outdoor unit, wherein each indoor unit includes a plurality of indoor heat exchangers connected in parallel and a plurality of electromagnetic valves, and the plurality of electromagnetic valves are respectively connected with inlets and outlets of the corresponding indoor heat exchangers; the multi-connected air conditioning system further comprises a controller for controlling the opening and closing of the plurality of electromagnetic valves so that the corresponding indoor heat exchangers prohibit heat exchange operation when the plurality of electromagnetic valves are closed, thereby reducing the load of the multi-connected air conditioning system.
The outdoor unit comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, an outdoor fan, an electronic expansion valve and a gas-liquid separator, and the indoor unit comprises a plurality of indoor heat exchangers, a plurality of electromagnetic valves, a throttling component and an indoor fan; the system comprises a plurality of indoor heat exchangers of an indoor unit, a plurality of air inlet valves, a plurality of air outlet valves, a plurality of air inlet valves, a plurality of air outlet valves, a plurality of indoor heat exchangers, a plurality of air inlet valves, a plurality of air outlet valves, a plurality of air inlet valves and a plurality of air outlet valves; the multi-connected air conditioning system also comprises a controller, wherein the controller is used for controlling the opening and closing of the electromagnetic valve so as to control the operation of the indoor heat exchanger, thereby adjusting the load of the multi-connected air conditioning system and avoiding the overload operation of the multi-connected air conditioning system.
Alternatively, in an implementation example, the multi-connected air conditioning system includes an outdoor unit and two indoor units, wherein each indoor unit includes two indoor heat exchangers (a first indoor heat exchanger and a second indoor heat exchanger) and an indoor fan, as shown in fig. 1 and fig. 2, the indoor heat exchangers 211 and 212 of the indoor units are connected in parallel, the indoor fan 216 is disposed opposite to the indoor heat exchangers 211 and 212, and an inlet and an outlet of the indoor heat exchanger 212 are respectively connected to the solenoid valve 213 and the solenoid valve 214; the indoor heat exchanger 221 and the indoor heat exchanger 222 of the other indoor unit are connected in parallel, the indoor fan 226 is arranged opposite to the indoor heat exchanger 221 and the indoor heat exchanger 222, and an inlet and an outlet of the indoor heat exchanger 222 are respectively connected with the solenoid valve 223 and the solenoid valve 224; the indoor heat exchanger 211 and the indoor heat exchanger 212 are connected to a first port of the four-way reversing valve 22 through a throttling part 215, the indoor heat exchanger 221 and the indoor heat exchanger 222 are connected to a return port of the compressor 21 through a gas-liquid separator 26 through a throttling part 225, an exhaust port of the compressor 21 is connected to a third port of the four-way reversing valve 22, a fourth port of the four-way reversing valve 22 is connected to the outdoor heat exchanger 23, and the outdoor heat exchanger 23 is further connected to the indoor heat exchanger 211, the indoor heat exchanger 212, the indoor heat exchanger 221 and the indoor heat exchanger 222 through an electronic expansion valve 25; the multi-connected air conditioning system further comprises a controller (not shown in the figure), and the controller is used for controlling the opening and closing of the electromagnetic valves 213 and 214, and the electromagnetic valves 223 and 224 to control the operation of the indoor heat exchangers 212 and 222, so as to adjust the load of the multi-connected air conditioning system and avoid the overload operation of the multi-connected air conditioning system.
Optionally, when the multi-connected air conditioning system operates, current operation state information of the multi-connected air conditioning system is detected in real time or at regular time, wherein the operation state information of the multi-connected air conditioning system includes, but is not limited to, normal refrigeration, low-temperature refrigeration, high-temperature refrigeration, normal heating, low-temperature heating, and the like.
After the current operating state information of the multi-split air conditioning system is detected, the currently suitable opening and closing state information of the solenoid valves 213, 214, 223 and 224 is determined according to the operating state information. The different operation state information of the multi-type air conditioning system corresponds to the different opening and closing state information of the solenoid valves 213, 214, 223 and 224.
Then, the solenoid valves 213, 214, 223, 224 are controlled to open or close according to the determined information on the currently appropriate opening/closing states of the solenoid valves 213, 214, 223, 224.
For example, if it is detected that the multi-connected air conditioning system is currently in low-temperature cooling operation, the electromagnetic valves 213 and 214, the electromagnetic valves 223 and 224 are controlled to be closed, that is, the indoor heat exchangers 212 and 222 are controlled not to be operated, and cooling is performed only by operating the indoor heat exchangers 211 and 221, so that not only is the load of the multi-connected air conditioning system reduced, but also the multi-connected air conditioning system is prevented from being stopped due to frequent reaching of the set temperature due to reduction of the actual cooling capacity of the multi-connected air conditioning system.
For another example, if it is detected that the multi-connected air conditioning system is currently in high-temperature refrigeration operation, the electromagnetic valve 213, the electromagnetic valve 214, the electromagnetic valve 223, and the electromagnetic valve 224 are controlled to be closed, that is, the indoor heat exchanger 212 and the indoor heat exchanger 222 are controlled not to operate, and refrigeration is performed only by operating the indoor heat exchanger 211 and the indoor heat exchanger 221, so that the actual refrigeration capacity of the multi-connected air conditioning system is reduced, the load of the multi-connected air conditioning system is reduced, and the reliability of the multi-connected air conditioning system is prevented from being affected by overload.
For another example, if it is detected that the current heating operation of the multi-connected air conditioning system is performed and the heating time is within the corresponding preset time, the electromagnetic valves 213 and 214, 223 and 224 are controlled to be closed, that is, the indoor heat exchangers 212 and 222 are controlled not to operate, and only the indoor heat exchangers 211 and 221 operate to perform cooling, so that not only is the load of the multi-connected air conditioning system reduced, but also the high pressure of the multi-connected air conditioning system is rapidly increased, and rapid heating is performed.
For another example, if it is detected that the multi-connected air conditioning system is currently in low-temperature heating operation, the electromagnetic valves 213 and 214, the electromagnetic valves 223 and 224 are controlled to be closed, that is, the indoor heat exchangers 212 and 222 are controlled not to operate, and heating is performed only by operating the indoor heat exchangers 211 and 221, so that not only is the load of the multi-connected air conditioning system reduced, but also the high-pressure of the multi-connected air conditioning system is increased, and thus the air supply temperature is increased.
According to the scheme provided by the embodiment, the indoor unit of the multi-connected air conditioning system comprises a plurality of indoor heat exchangers, an inlet and an outlet of at least one indoor heat exchanger are respectively connected with an electromagnetic valve, and the indoor heat exchangers normally operate when the electromagnetic valves are opened by controlling the opening and closing of the electromagnetic valves; when the electromagnetic valve is closed, the indoor heat exchanger does not operate, so that the load of the multi-connected air conditioning system is adjusted, and the multi-connected air conditioning system is prevented from operating in an overload mode. Therefore, the reliability of the operation of the multi-connected air conditioning system is improved.
The embodiment of the invention also provides a control device of the multi-connected air conditioning system.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a control device of a multi-connected air conditioning system in a hardware operating environment according to an embodiment of the present invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
As shown in fig. 3, the control device of the multi-connected air conditioning system may include: a processor 1001, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
It will be understood by those skilled in the art that the control arrangement of the multiple air conditioning system shown in fig. 3 does not constitute a limitation of the control arrangement of the multiple air conditioning system and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 3, a memory 1005, which is one type of computer storage medium, may include therein an operating system, a network communication module, and a multi-connected air conditioning system control program.
In the present invention, the control device of the multi-connected air conditioning system calls the communication program of the home appliance stored in the memory 1005 through the processor 1001, and performs the following operations:
detecting the current running state information of the multi-connected air conditioning system;
determining the current suitable opening and closing state information of the electromagnetic valve according to the running state information;
and controlling the electromagnetic valve to open and close according to the opening and closing state information.
Further, the processor 1001 may call the multi-connected air conditioning system control program stored in the memory 1005, and also perform the following operations:
and when the running state information is low-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, the processor 1001 may call the multi-connected air conditioning system control program stored in the memory 1005, and also perform the following operations:
and when the running state information is high-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, the processor 1001 may call the multi-connected air conditioning system control program stored in the memory 1005, and also perform the following operations:
when the running state information is high-temperature refrigeration, detecting the return air superheat degree of the multi-connected air conditioning system;
and when the return air superheat degree is larger than a preset superheat degree threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, the processor 1001 may call the multi-connected air conditioning system control program stored in the memory 1005, and also perform the following operations:
and when the running state information is heating and the heating time length is less than a preset time length threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, the processor 1001 may call the multi-connected air conditioning system control program stored in the memory 1005, and also perform the following operations:
and when the running state information is low-temperature heating, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
According to the scheme, the indoor unit of the multi-connected air-conditioning system comprises the indoor heat exchangers, the inlet and the outlet of at least one indoor heat exchanger are respectively connected with the electromagnetic valve, the electromagnetic valve is controlled to be opened and closed according to the running condition of the multi-connected air-conditioning system, when the electromagnetic valve is opened, the corresponding indoor heat exchanger normally runs, and when the electromagnetic valve is closed, the corresponding indoor heat exchanger does not run, so that the load of the multi-connected air-conditioning system is reduced, the multi-connected air-conditioning system does not need to be prevented from running in an overload mode through shutdown, and therefore the running reliability of the multi-connected air-conditioning system.
Based on the hardware structure, the embodiment of the control method of the multi-connected air conditioning system is provided.
Referring to fig. 4, fig. 4 is a flowchart illustrating a control method of a multi-connected air conditioning system according to a first embodiment of the present invention.
In a first embodiment, a multi-connected air conditioning system is the multi-connected air conditioning system described in the above embodiments, and a control method of the multi-connected air conditioning system includes the following steps:
step S10, detecting the current running state information of the multi-connected air conditioning system;
step S20, determining the current suitable opening and closing state information of the electromagnetic valve according to the running state information;
and step S30, controlling the opening and closing of the electromagnetic valve according to the opening and closing state information.
Nowadays, a multi-connected air conditioning system generally includes one or more outdoor units, and a plurality of indoor units, each of which includes an indoor heat exchanger for performing indoor heat exchange to achieve heating/cooling. In some cases, when the system is overloaded, the outdoor unit is generally turned off to avoid the overloaded operation of the multi-connected air conditioning system, that is, the shutdown, which causes the multi-connected air conditioning system to be unable to continue cooling/heating, and therefore, the reliability of the operation of the multi-connected air conditioning system needs to be improved.
In order to improve the reliability of the operation of the multi-connected air conditioning system, the invention provides a control method of the multi-connected air conditioning system. For example, as shown in fig. 1, the indoor unit includes two indoor heat exchangers, and an inlet and an outlet of one of the indoor heat exchangers are respectively connected to the solenoid valves.
Optionally, when the multi-connected air conditioning system operates, current operation state information of the multi-connected air conditioning system is detected in real time or at regular time, wherein the operation state information of the multi-connected air conditioning system includes, but is not limited to, normal refrigeration, low-temperature refrigeration, high-temperature refrigeration, normal heating, low-temperature heating, and the like.
After the current operation state information of the multi-connected air conditioning system is detected, the current suitable opening and closing state information of the electromagnetic valve is determined according to the operation state information. The different operation state information of the multi-connected air conditioning system corresponds to the different opening and closing state information of the electromagnetic valve.
For example, the mapping relationship between the information of various operation states and the information of the open/close state of the corresponding solenoid valve is preset, such as the opening of the corresponding solenoid valve for normal cooling, the closing of the corresponding solenoid valve for low-temperature cooling, and the like. After the current operation state information of the multi-connected air conditioning system is detected, the mapping relation between the preset various operation state information and the corresponding electromagnetic valve opening and closing state information is generally inquired, and the electromagnetic valve opening and closing state information corresponding to the current operation state information of the multi-connected air conditioning system, that is, the current suitable opening and closing state information of the electromagnetic valve is determined.
And then, controlling the plurality of electromagnetic valves to be opened or closed according to the determined information of the opening and closing states suitable for the electromagnetic valves at present. For example, if the determined currently appropriate opening/closing state information of the solenoid valves is closed and the plurality of solenoid valves are currently open, the plurality of solenoid valves are controlled to be closed. For another example, if the determined currently suitable opening/closing state information of the solenoid valves is open, and the plurality of solenoid valves are currently closed, the plurality of solenoid valves are controlled to be opened. And if the determined information of the current suitable opening and closing states of the electromagnetic valves is open, and the current electromagnetic valves are in the open states, controlling to maintain the opening of the electromagnetic valves. And if the determined information of the current suitable opening and closing states of the electromagnetic valves is closed and the current electromagnetic valves are in the closed states, controlling to maintain the closing of the electromagnetic valves.
According to the scheme provided by the embodiment, the indoor unit of the multi-connected air-conditioning system comprises the plurality of indoor heat exchangers, the inlet and the outlet of at least one indoor heat exchanger are respectively connected with the electromagnetic valve, the electromagnetic valve is controlled to be opened and closed according to the running condition of the multi-connected air-conditioning system, when the electromagnetic valve is opened, the corresponding indoor heat exchanger normally runs, and when the electromagnetic valve is closed, the corresponding indoor heat exchanger does not run, so that the load of the multi-connected air-conditioning system is reduced, the multi-connected air-conditioning system does not need to be prevented from running in an overload mode through shutdown, and therefore the running reliability of the multi.
Further, a second embodiment of the control method of a multi-connected air conditioning system according to the present invention is provided based on the first embodiment, and in this embodiment, detailed description is given to control of the multi-connected air conditioning system in various operation states such as heating and cooling.
Scenario one: in the low-temperature cooling operation of the multi-connected air conditioning system, optionally, the step S20 includes:
step a, when the running state information is low-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Optionally, when detecting that the multi-connected air conditioning system is in low-temperature cooling operation, for example, when the multi-connected air conditioning system is in a cooling mode in an environment where the ambient temperature is lower than a preset temperature, it is determined that the currently appropriate on-off state information of the electromagnetic valve is closed. The preset temperature can be flexibly set according to actual conditions, for example, the preset temperature is set to 18 degrees, and the specific value of the preset temperature is not limited.
After that, the electromagnetic valve is controlled to be closed, for example, still taking the multi-split air conditioning system of fig. 2 as an example, the electromagnetic valve 213, the electromagnetic valve 214, the electromagnetic valve 223 and the electromagnetic valve 224 are controlled to be closed, the indoor heat exchanger 212 and the indoor heat exchanger 222 are not operated, and the refrigeration is performed only by the operation of the indoor heat exchanger 211 and the indoor heat exchanger 221, so that not only is the load of the multi-split air conditioning system reduced, but also the frequent shutdown of the outdoor unit caused by the indoor unit reaching the set temperature is avoided due to the reduction of the actual cooling capacity of the multi-split.
Scenario two: in the high-temperature cooling operation of the multi-connected air conditioning system, optionally, the step S20 includes:
and b, when the running state information is high-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Optionally, when detecting that the multi-connected air conditioning system is in high-temperature refrigeration operation, the indoor side environment temperature is high, which may cause a large load on the multi-connected air conditioning system, at this time, it is determined that the currently appropriate opening and closing state information of the electromagnetic valve is closed, and then, the electromagnetic valve is controlled to be closed. For example, still taking the multi-connected air conditioning system of fig. 2 as an example, the electromagnetic valve 213, the electromagnetic valve 214, the electromagnetic valve 223, and the electromagnetic valve 224 are controlled to be closed, the indoor heat exchanger 212 and the indoor heat exchanger 222 are not operated, and only the indoor heat exchanger 211 and the indoor heat exchanger 221 are operated to perform cooling, so that the actual cooling capacity of the multi-connected air conditioning system is reduced, the load of the multi-connected air conditioning system is reduced, and the reliability of the multi-connected air conditioning system is prevented from being affected by overload.
Optionally, the step b includes:
step b1, detecting the return air superheat degree of the multi-connected air conditioning system when the running state information is high-temperature refrigeration;
and b2, when the return air superheat degree is larger than a preset superheat degree threshold value, determining that the current appropriate opening and closing state information of the electromagnetic valve is closed.
Optionally, in order to more accurately control the multi-connected air conditioning system and avoid the influence of overload on the reliability of the multi-connected air conditioning system, a corresponding preset superheat threshold is set in advance for the return air superheat of the compressor in the air conditioning system, and if the preset superheat threshold is set to 15 degrees in advance, it can be understood that the preset superheat threshold can be flexibly set according to the specific conditions of the multi-connected air conditioning system.
When the high-temperature refrigeration operation of the multi-connected air conditioning system is detected, the load of the multi-connected air conditioning system is large due to the fact that the indoor side environment temperature is high, the return air superheat degree of a compressor in the multi-connected air conditioning system is high, at the moment, the current return air superheat degree of the compressor in the multi-connected air conditioning system is detected, and the detected return air superheat degree is compared with a preset superheat degree threshold value. And if the detected return air superheat degree is larger than a preset superheat degree threshold value, determining that the current appropriate opening and closing state information of the electromagnetic valve is closed, and then controlling the electromagnetic valve to be closed. On the contrary, if the detected return air superheat degree is smaller than the preset superheat degree threshold value, no response processing is performed at this time.
Scenario three: in the normal cooling operation of the multi-connected air conditioning system, optionally, the step S20 includes:
and c, when the running state information is normal refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is open.
Optionally, when detecting that the multi-connected air conditioning system is in normal refrigeration operation, determining that the current appropriate opening and closing state information of the electromagnetic valve is open, and then controlling the electromagnetic valve to open. For example, also taking the multi-type air conditioning system of fig. 2 as an example, the solenoid valves 213, 214, 223, and 224 are controlled to be opened, the indoor heat exchangers 211, 212, 221, and 222 are operated, and cooling is performed by operating the indoor heat exchangers 211, 212, 221, and 222.
Scene four: in normal heating operation of the multi-connected air conditioning system, optionally, the step S20 includes:
and d, when the running state information is normal heating, determining that the current suitable opening and closing state information of the electromagnetic valve is open.
Optionally, when detecting that the multi-connected air conditioning system is in normal heating operation, determining that the current appropriate opening and closing state information of the electromagnetic valve is open, and then controlling the electromagnetic valve to open. For example, also taking the multi-type air conditioning system of fig. 2 as an example, the solenoid valves 213, 214, 223, and 224 are controlled to be opened, the indoor heat exchangers 211, 212, 221, and 222 are operated, and heating is performed by the operation of the indoor heat exchangers 211, 212, 221, and 222.
Scene five: during a period of time when the multi-connected air conditioning system starts heating operation, optionally, the step S20 includes:
and e, when the running state information is heating and the heating time is less than a preset time threshold, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Optionally, when the current heating operation of the multi-connected air conditioning system is detected and the heating time length of the multi-connected air conditioning system is smaller than a preset time length threshold, the current suitable opening and closing state information of the electromagnetic valve is determined to be closed. The preset time length threshold value can be flexibly set according to specific conditions such as the multi-connected air conditioning system and the current environment of the multi-connected air conditioning system. Optionally, the value range of the preset time threshold is set to be 3-5 minutes.
Thereafter, the control solenoid valve is closed. For example, still taking the multi-connected air conditioning system of fig. 2 as an example, the electromagnetic valve 213, the electromagnetic valve 214, the electromagnetic valve 223, and the electromagnetic valve 224 are controlled to be closed, the indoor heat exchanger 212 and the indoor heat exchanger 222 are not operated, and only the indoor heat exchanger 211 and the indoor heat exchanger 221 are operated to perform cooling, so that not only is the load of the multi-connected air conditioning system reduced, but also the high pressure of the multi-connected air conditioning system is rapidly increased, thereby performing rapid heating, and improving the user experience.
And further, detecting the high-pressure of the multi-connected air-conditioning system, and when the high-pressure of the multi-connected air-conditioning system is detected to be greater than a preset pressure threshold value, controlling the electromagnetic valve to be opened to perform normal heating operation.
And further, detecting the frequency of the compressor in the multi-connected air conditioning system, and controlling the electromagnetic valve to be opened to perform normal heating operation when detecting that the frequency of the compressor in the multi-connected air conditioning system is higher than a preset frequency threshold value.
Scenario six: during low-temperature heating operation of the multi-connected air conditioning system, optionally, the step S20 includes:
and f, when the running state information is low-temperature heating, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Optionally, when detecting that the multi-connected air conditioning system is in low-temperature heating operation, the high-pressure of the multi-connected air conditioning system is low, and the indoor unit may have low air supply temperature or cold air prevention protection. For example, still taking the multi-connected air conditioning system of fig. 2 as an example, the electromagnetic valves 213 and 214, 223 and 224 are controlled to be closed, the indoor heat exchangers 212 and 222 are not operated, and heating is performed only by operating the indoor heat exchangers 211 and 221, so that not only is the load of the multi-connected air conditioning system reduced, but also the high pressure of the multi-connected air conditioning system is increased, and thus the air supply temperature is increased.
Optionally, a corresponding preset high-pressure threshold is preset, and if the preset high-pressure threshold is set to be 2MPa, the specific numerical value of the preset high-pressure threshold is not limited in this embodiment, and the preset high-pressure threshold can be flexibly set according to actual conditions. When the low-temperature heating operation of the multi-connected air conditioning system is detected, the high-pressure of the multi-connected air conditioning system is detected, the detected high-pressure is compared with a preset high-pressure threshold, if the detected high-pressure is smaller than the preset high-pressure threshold, the air supply temperature of the indoor unit is low or cold air protection is performed, and the electromagnetic valve is controlled to be closed to avoid the problems. Therefore, the high pressure of the multi-connected air conditioning system is increased, and the air supply temperature is increased.
According to the scheme provided by the embodiment, under different running states of the multi-connected air-conditioning system, the opening and closing of the electromagnetic valve are controlled, the problems that the outdoor unit is frequently stopped due to the fact that the indoor unit reaches the set temperature, and the reliability of the multi-connected air-conditioning system is affected due to overload are avoided, the effects of rapidly heating, improving the air supply temperature and the like are achieved, and therefore user experience is improved.
The present invention also provides a computer readable storage medium storing a multiple air conditioning system control program executable by one or more processors for:
detecting the current running state information of the multi-connected air conditioning system;
determining the current suitable opening and closing state information of the electromagnetic valve according to the running state information;
and controlling the electromagnetic valve to open and close according to the opening and closing state information.
Further, when executed by the processor, the multi-connected air conditioning system control program further implements the following operations:
and when the running state information is low-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, when executed by the processor, the multi-connected air conditioning system control program further implements the following operations:
and when the running state information is high-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, when executed by the processor, the multi-connected air conditioning system control program further implements the following operations:
when the running state information is high-temperature refrigeration, detecting the return air superheat degree of the multi-connected air conditioning system;
and when the return air superheat degree is larger than a preset superheat degree threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, when executed by the processor, the multi-connected air conditioning system control program further implements the following operations:
and when the running state information is heating and the heating time length is less than a preset time length threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
Further, when executed by the processor, the multi-connected air conditioning system control program further implements the following operations:
and when the running state information is low-temperature heating, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
According to the scheme, the indoor unit of the multi-connected air-conditioning system comprises the indoor heat exchangers, the inlet and the outlet of at least one indoor heat exchanger are respectively connected with the electromagnetic valve, the electromagnetic valve is controlled to be opened and closed according to the running condition of the multi-connected air-conditioning system, when the electromagnetic valve is opened, the corresponding indoor heat exchanger normally runs, and when the electromagnetic valve is closed, the corresponding indoor heat exchanger does not run, so that the load of the multi-connected air-conditioning system is adjusted, the multi-connected air-conditioning system does not need to be prevented from running in an overload mode through shutdown, and therefore the running reliability of the multi-connected air-conditioning system.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A multi-connected air conditioning system comprises at least one outdoor unit and a plurality of indoor units, and is characterized in that each indoor unit comprises a plurality of indoor heat exchangers connected in parallel and a plurality of electromagnetic valves, and the electromagnetic valves are respectively connected with inlets and outlets of the corresponding indoor heat exchangers; the multi-connected air conditioning system also comprises a controller, wherein the controller is used for controlling the opening and closing of the electromagnetic valves according to the running state information, so that when the electromagnetic valves are closed, the corresponding indoor heat exchangers forbid heat exchange operation, and the load of the multi-connected air conditioning system is reduced; the controller is used for controlling the opening and closing steps of the plurality of electromagnetic valves according to the running state information and comprises the following steps: and when the running state information is heating and the heating time is less than a preset time threshold, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
2. The multi-connected air conditioning system according to claim 1, wherein the plurality of indoor heat exchangers connected in parallel include a first indoor heat exchanger and a second indoor heat exchanger, the plurality of solenoid valves include a first solenoid valve and a second solenoid valve, and an inlet and an outlet of the second indoor heat exchanger are connected to the first solenoid valve and the second solenoid valve, respectively; the controller is used for controlling the first electromagnetic valve and the second electromagnetic valve to be opened or closed.
3. A control method of a multi-connected air conditioning system, wherein the multi-connected air conditioning system is the multi-connected air conditioning system of claim 1, and the control method of the multi-connected air conditioning system comprises the following steps:
detecting the current running state information of the multi-connected air conditioning system;
determining the current suitable opening and closing state information of the electromagnetic valve according to the running state information;
controlling the electromagnetic valve to open and close according to the opening and closing state information;
the step of determining the currently suitable opening and closing state information of the electromagnetic valve according to the running state information comprises the following steps:
and when the running state information is heating and the heating time length is less than a preset time length threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
4. The method as claimed in claim 3, wherein the step of determining the currently suitable on/off state information of the solenoid valves according to the operation state information comprises:
and when the running state information is low-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
5. The method as claimed in claim 3, wherein the step of determining the currently suitable on/off state information of the solenoid valves according to the operation state information comprises:
and when the running state information is high-temperature refrigeration, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
6. The method as claimed in claim 5, wherein the step of determining that the currently suitable open/close state information of the solenoid valves is closed when the operation state information is high temperature cooling comprises:
when the running state information is high-temperature refrigeration, detecting the return air superheat degree of the multi-connected air conditioning system;
and when the return air superheat degree is larger than a preset superheat degree threshold value, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
7. The method as claimed in claim 3, wherein the step of determining the currently suitable on/off state information of the solenoid valves according to the operation state information comprises:
and when the running state information is low-temperature heating, determining that the current suitable opening and closing state information of the electromagnetic valve is closed.
8. A control device of a multi-connected air conditioning system, characterized in that the control device of the multi-connected air conditioning system comprises: the system comprises a memory, a processor and a multi-connected air conditioning system control program which is stored on the memory and can run on the processor; the multi-connected air conditioning system control program, when executed by the processor, implements the steps of the control method of a multi-connected air conditioning system as recited in any one of claims 3-7.
9. A computer-readable storage medium, wherein a multi-connected air conditioning system control program is stored thereon, which when executed by a processor, implements the steps of the method of controlling a multi-connected air conditioning system as recited in any one of claims 3-7.
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| CN110686379B (en) * | 2019-10-10 | 2021-05-28 | 广东美的暖通设备有限公司 | Control method of air conditioning system, air duct type air conditioning system and readable storage medium |
| CN111780325A (en) * | 2020-06-17 | 2020-10-16 | 珠海格力电器股份有限公司 | Control method for air conditioner and air conditioner using same |
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| CN104949300B (en) * | 2015-07-23 | 2019-07-30 | 北京联合大学 | A kind of thermoregulator and its implementation of single channel A/D conversion |
| JP6319334B2 (en) * | 2016-01-15 | 2018-05-09 | ダイキン工業株式会社 | Refrigeration equipment |
| CN105953360B (en) * | 2016-05-04 | 2018-10-16 | 广东美的暖通设备有限公司 | The control method of air conditioner and air conditioner |
| CN107990463A (en) * | 2017-12-29 | 2018-05-04 | 武汉科技大学 | A kind of multi-type air conditioning system of cooling tower and underground pipe Hybrid connections |
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Denomination of invention: Multi connected air conditioning system and its control method, device and readable storage medium Effective date of registration: 20211019 Granted publication date: 20201009 Pledgee: Bank of China Limited by Share Ltd. Shunde branch Pledgor: GD MIDEA HEATING & VENTILATING EQUIPMENT Co.,Ltd.|MIDEA GROUP Co.,Ltd. Registration number: Y2021980010882 |
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Date of cancellation: 20220708 Granted publication date: 20201009 Pledgee: Bank of China Limited by Share Ltd. Shunde branch Pledgor: GD MIDEA HEATING & VENTILATING EQUIPMENT Co.,Ltd.|MIDEA GROUP Co.,Ltd. Registration number: Y2021980010882 |