CN108716758B - Control method of air conditioning unit and related equipment - Google Patents
Control method of air conditioning unit and related equipment Download PDFInfo
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- CN108716758B CN108716758B CN201810488173.0A CN201810488173A CN108716758B CN 108716758 B CN108716758 B CN 108716758B CN 201810488173 A CN201810488173 A CN 201810488173A CN 108716758 B CN108716758 B CN 108716758B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 235
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000010257 thawing Methods 0.000 claims abstract description 97
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The application relates to a control method of an air conditioning unit and related equipment. The control method comprises the following steps: detecting a control instruction of the air conditioning unit for exiting an oil return control mode or a defrosting control mode; if the control instruction is detected, acquiring the running state of a compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors; if the running state of the compressor is single-compressor running, controlling each compressor of the air conditioning unit to run according to a first target frequency, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal running; therefore, the frequency requirements of all the compressors can be met, the problem that the compressors are out of step due to low running frequency is avoided, and the control effect of the air conditioning unit can be improved.
Description
Technical Field
The present application relates to the field of control technologies, and in particular, to a control method for an air conditioning unit and a related device.
Background
For the air conditioning unit comprising at least two compressors, the operation of the at least two compressors can be controlled, and when the refrigeration or heating load of the air conditioning unit is low, the operation state can be switched to the operation of a single compressor.
In the related art, during the operation of the air conditioning unit, if the air conditioning unit reaches the condition of the oil return control mode or the defrosting control mode, the air conditioning unit normally enters the oil return control mode or the defrosting control mode, and when the air conditioning unit exits the oil return control mode or the defrosting control mode, the operation of each compressor is usually controlled by the average frequency of each compressor before entering the oil return control mode or the defrosting control mode. If the air conditioning unit is operated in the single-compressor operation state before entering the oil return control mode or the defrosting control mode, when the air conditioning unit exits the oil return control mode or the defrosting control mode, the compressors may be out of step due to low operation frequency, and the operation of the air conditioning unit is affected.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides a control method of an air conditioning unit and related equipment.
According to a first aspect of embodiments of the present application, there is provided a control method for an air conditioning unit, the air conditioning unit including at least two compressors, the control method including:
detecting a control instruction of the air conditioning unit for exiting an oil return control mode or a defrosting control mode;
if the control instruction is detected, acquiring the running state of a compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors;
and if the running state of the compressor is single-compressor running, controlling each compressor of the air conditioning unit to run according to a first target frequency, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal running.
Optionally, the control method further includes:
and if the running state of the compressors is that at least two compressors run, controlling each compressor of the air conditioning unit to run according to a second target frequency, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
Optionally, before controlling each compressor of the air conditioning unit to operate according to the first target frequency, the control method further includes:
acquiring the total number of compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode;
and determining the first target frequency according to the total number of the compressors of the air conditioning unit and the average frequency of the compressors before the air conditioning unit enters an oil return control mode or a defrosting control mode.
Optionally, the determining the first target frequency according to the total number of the compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode includes:
calculating the product of the average frequency of each compressor and M before the air conditioning unit enters an oil return control mode or a defrosting control mode to obtain the first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
Optionally, the lowest frequencies of the compressors of the air conditioning unit when the compressors independently and normally operate are the same; the first target frequency is the lowest frequency when each compressor independently operates normally.
Optionally, before obtaining the operating state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the control method further includes:
monitoring the number of the compressors currently operated by the air conditioning unit in real time;
when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit;
and determining the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
According to a second aspect of the embodiments of the present application, there is provided a control device of an air conditioning unit, including:
the detection module is used for detecting a control instruction of the air conditioning unit for exiting the oil return control mode or the defrosting control mode;
the acquisition module is used for acquiring the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode if the control instruction is detected, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors;
and the first control module is used for controlling each compressor of the air conditioning unit to operate according to a first target frequency if the operation state of the compressor is single-compressor operation, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal operation.
Optionally, the control device further includes:
and the second control module is used for controlling each compressor of the air conditioning unit to operate according to a second target frequency if the operation state of the compressor is that at least two compressors operate, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
Optionally, the control device further includes a frequency determining module, configured to obtain, before each compressor of the air conditioning unit is controlled to operate according to the first target frequency, a total number of the compressors of the air conditioning unit and an average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode; and determining the first target frequency according to the total number of the compressors of the air conditioning unit and the average frequency of the compressors before the air conditioning unit enters an oil return control mode or a defrosting control mode.
Optionally, when the first target frequency is determined according to the total number of the compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the frequency determining module is specifically configured to:
calculating the product of the average frequency of each compressor and M before the air conditioning unit enters an oil return control mode or a defrosting control mode to obtain the first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
Optionally, the lowest frequencies of the compressors of the air conditioning unit when the compressors independently and normally operate are the same; the first target frequency is the lowest frequency when each compressor independently operates normally.
Optionally, the control device further includes an operation state determining module, configured to monitor, in real time, the number of currently operating compressors of the air conditioning unit before the air conditioning unit enters the oil return control mode or the defrosting control mode; when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit; and determining the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
According to a third aspect of embodiments of the present application, there is provided an air conditioning system including:
the control device of the air conditioning unit and the at least two compressors are respectively connected with the control device of the air conditioning unit;
the control device of the air conditioning unit is used for executing the control method of the air conditioning unit.
According to a fourth aspect of the embodiments of the present application, there is provided a control apparatus for an air conditioning unit, including:
a processor and a memory, the processor and memory connected by a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing a program, and the program is at least used for executing the control method of the air conditioning unit.
According to a fifth aspect of embodiments of the present application, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method of the air conditioning unit as set forth in any one of the above.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
when the air conditioning unit exits the oil return control mode or the defrosting control mode, if the single compressor is determined to run before entering oil return or defrosting, the compressors are controlled by using the lowest frequency which is greater than or equal to the normal running frequency of the compressors as the target frequency, so that the frequency requirements of all the compressors can be met, the problem that the compressors are out of step due to low running frequency is avoided, and the control effect of the air conditioning unit can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flowchart of a control method for an air conditioning unit according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating a control method of an air conditioning unit according to another embodiment of the present application.
Fig. 3 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of methods and related apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
Fig. 1 is a flowchart of a control method of an air conditioning unit according to an embodiment of the present application. In this embodiment, the air conditioning unit includes at least two compressors, and referring to fig. 1, the control method of this embodiment includes:
and 11, detecting a control instruction of the air conditioning unit for exiting the oil return control mode or the defrosting control mode.
And step 12, if a control instruction that the air conditioning unit exits the oil return control mode or the defrosting control mode is detected, acquiring the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors.
And step 13, if the running state of the compressor is single-compressor running, controlling each compressor of the air conditioning unit to run according to a first target frequency, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal running.
In this embodiment, when the air conditioning unit exits the oil return control mode or the defrosting control mode, if it is determined that the single compressor operates before entering the oil return control mode or the defrosting control mode, the compressors are controlled by using the lowest frequency, which is greater than or equal to the lowest frequency when the compressors normally operate, as the target frequency, so that the frequency requirements of all the compressors can be met, the problem that the compressors are out of step due to low operating frequency is avoided, and the control effect of the air conditioning unit can be improved.
For the air conditioning units with the same compressors, the lowest frequency of the compressors in normal operation refers to the lowest frequency of each compressor in independent normal operation. For the air conditioning unit with the compressors which are not identical, the lowest frequency of the compressors in normal operation refers to the maximum value of the lowest frequencies of each compressor in independent normal operation.
Supposing that all the compressors of the air conditioning unit are identical, the frequency ranges of the independent normal operation are all a0Hz～b0Hz, wherein, a0For the lowest frequency of the compressor in normal operation independently, b0The first target frequency is higher than or equal to a for the highest frequency of the compressor in independent normal operation0Hz.
Assuming that the compressors of the air conditioning unit are not completely identical and the frequency ranges of the independent normal operation are not completely identical, for example, the air conditioning unit comprises N compressors, and the frequency range of the independent normal operation of the ith compressor is aiHz～biHz, i is 1,2, ……, N; wherein, aiIs the lowest frequency of the i-th compressor during independent normal operation, biThe maximum frequency of the ith compressor in independent normal operation is the highest frequency, and at the moment, if the compressors are ensured to normally operate together, the frequency requirement of at least one compressor with the maximum lowest frequency in independent normal operation in the N compressors is met, namely a is selected1、a2、……、aNMaximum value of (a)MAXThe first target frequency is greater than or equal to aMAXAnd (4) finishing.
In a specific implementation, the specific value of the first target frequency may be determined according to actual needs, and two possible determination manners are listed below.
In one possible embodiment, the first target frequency is set to a default frequency value. For example, the lowest frequency of each compressor of the air conditioning unit during independent normal operation is the same, and the first target frequency is the lowest frequency of each compressor during independent normal operation. For example, the air conditioning unit includes two identical compressors, the frequency ranges of the independent normal operation are both 15Hz to 100Hz, and the first target frequency may be 15 Hz. Of course, other default frequency values can be set as required, as long as each compressor can be ensured to normally operate without step loss.
In another possible embodiment, before controlling the compressors of the air conditioning unit to operate at the first target frequency, the control method of this embodiment further includes: acquiring the total number of compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode; and determining a first target frequency according to the total number of the obtained compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
The first target frequency is determined according to the total number of the obtained compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, and the specific implementation mode can be as follows: calculating the product of the average frequency of each compressor and M to obtain a first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
Generally, before an air conditioning unit enters an oil return control mode or a defrosting control mode, if a single compressor of the air conditioning unit operates, the load is low at this time, the refrigerant circulation volume in the air conditioning system is small, and if the air conditioning unit exits the oil return control mode or the defrosting control mode, all the compressors are controlled to operate according to a high target frequency, so that the refrigerant circulation volume in the air conditioning system is increased, the problems that the high pressure is high and the refrigerant on the low pressure side is not completely evaporated are caused, and the stable operation of the air conditioning unit is influenced, therefore, the first target frequency is not high. Optionally, the value of M is equal to the total number of compressors. Therefore, the obtained first target frequency is the frequency of the single compressor during operation before the air conditioning unit enters the oil return control mode or the defrosting control mode, and is a lower frequency, and the compressors are controlled to operate according to the lower first target frequency, so that the problem can be avoided.
The assumption is that the air conditioning unit comprises two identical compressors, and the frequency range of the independent normal operation is 15 Hz-100 Hz. Before the air conditioning unit enters an oil return control mode or a defrosting control mode, the operating frequency of one compressor is 20Hz, the operating frequency of the other compressor is 0Hz, the average frequency of the two compressors is 10Hz, and the first target frequency is equal to the average frequency which is multiplied by the total number 2 of the compressors and is 20Hz, so that the two compressors can normally operate.
In order to obtain an accurate operating state of the compressor, optionally, before obtaining the operating state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the control method of this embodiment further includes: monitoring the number of the compressors currently operated by the air conditioning unit in real time; when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit; and determining the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
When the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode is determined according to the recorded number of the currently running compressors of the air conditioning unit, a specific implementation mode can be as follows: judging whether the number of the compressors currently operated by the air conditioning unit is equal to 1, if so, determining that the operation state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode is the operation of a single compressor, otherwise, determining that the operation state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode is the operation of at least two compressors; another specific implementation manner may be: judging whether the number of the compressors currently operated by the air conditioning unit is greater than 1, if so, determining that the operation state of the compressors before the air conditioning unit enters the oil return control mode or the defrosting control mode is that at least two compressors are operated, otherwise, determining that the operation state of the compressors before the air conditioning unit enters the oil return control mode or the defrosting control mode is that a single compressor is operated.
It should be noted that the timing for determining the execution time of the operation state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode may be executed immediately after the number of the currently-operated compressors of the air conditioning unit is recorded, or may be executed after a control instruction for the air conditioning unit to exit the oil return control mode or the defrosting control mode is received and before the operation state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode is acquired.
Based on the above related embodiment, if the operation state of the compressor is that at least two compressors are operated, each compressor of the air conditioning unit is controlled to operate according to the second target frequency, where the second target frequency is an average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode. Therefore, the two scenes of single compressor operation and at least two compressors operation are differentially controlled, the actual frequency requirements of the respective scenes are met, and the control effect is better.
Optionally, in order to obtain an accurate average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the control method provided in this embodiment further includes: monitoring the current operating frequency of each compressor in the air conditioning unit in real time; when a control instruction that the air conditioning unit enters oil return or defrosting is received, the operating frequency of each compressor is obtained; and calculating the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode according to the acquired running frequency of each compressor.
It should be noted that the calculating step of the average frequency may be performed immediately after the operation frequency of each compressor is obtained, or may be performed after a control instruction that the air conditioning unit exits the oil return control mode or the defrosting control mode is received, before the operation state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode is obtained, and the like.
Fig. 2 is a flowchart of a control method for an air conditioning unit according to another embodiment of the present application.
In the application scenario of this embodiment, the air conditioning unit includes two identical compressors, and the frequency ranges of each compressor during independent normal operation are the same. Referring to fig. 2, the control method of the present embodiment includes:
and 21, monitoring the number of the currently operated compressors in the air conditioning unit and the current operation frequency of each compressor in real time, and executing the step 22.
And step 22, when a control instruction that the air conditioning unit enters the oil return control mode or the defrosting control mode is received, recording the number of the currently operated compressors of the air conditioning unit, acquiring the operating frequency of each compressor, and executing step 23.
And step 23, determining the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode according to the recorded number of the currently running compressors of the air conditioning unit, and executing step 24.
The specific manner of this step can be seen in the above related embodiments, and is not described herein again.
And 24, calculating the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode according to the acquired running frequency of each compressor, and executing the step 25.
And 25, detecting a control instruction of exiting the oil return control mode or the defrosting control mode of the air conditioning unit, and executing the step 26.
And 26, if a control instruction for exiting the oil return control mode or the defrosting control mode is detected, acquiring the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, and executing the step 27.
And 27, judging whether the acquired compressor running state is the single compressor running or not, if so, executing step 28, otherwise, executing step 29.
And 28, acquiring the total number M of the compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode, calculating the product of the average frequency of each compressor and M to obtain a first target frequency, and executing step 30.
And 29, controlling each compressor of the air conditioning unit to operate according to a second target frequency, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
And step 30, controlling each compressor of the air conditioning unit to operate according to the first target frequency.
Fig. 3 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present application. Referring to fig. 3, the control device provided in this embodiment includes:
the detection module 301 is configured to detect a control instruction for the air conditioning unit to exit the oil return control mode or the defrosting control mode;
an obtaining module 302, configured to obtain, if a control instruction that the air conditioning unit exits the oil return control mode or the defrosting control mode is detected, an operation state of a compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, where the operation state of the compressor is a single compressor operation or at least two compressors operation;
the first control module 303 is configured to control each compressor of the air conditioning unit to operate according to a first target frequency if the operation state of the compressor is single-compressor operation, where the first target frequency is greater than or equal to a lowest frequency of each compressor in normal operation.
Optionally, the control device of this embodiment further includes:
and the second control module is used for controlling each compressor of the air conditioning unit to operate according to a second target frequency if the operation state of the compressor is that at least two compressors operate, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode.
Optionally, the control device of this embodiment further includes a frequency determining module, configured to obtain a total number of compressors of the air conditioning unit and an average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode before each compressor of the air conditioning unit is controlled to operate according to the first target frequency; and determining a first target frequency according to the total number of the obtained compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
Optionally, when the first target frequency is determined according to the total number of the acquired compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the frequency determination module is specifically configured to:
calculating the product of the average frequency of each compressor and M to obtain a first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
Optionally, the lowest frequencies of the compressors of the air conditioning unit when the compressors independently and normally operate are the same; the first target frequency is the lowest frequency at which each compressor operates independently and normally.
Optionally, the control device of this embodiment further includes an operation state determining module, configured to monitor, in real time, the number of currently operating compressors of the air conditioning unit before obtaining an operation state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode; when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit; and determining the running state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
Fig. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application. Referring to fig. 4, the air conditioning system of the present embodiment includes:
the system comprises a control device 401 of the air conditioning unit and at least two compressors 402 which are respectively connected with the control device of the air conditioning unit;
the control device 401 of the air conditioning unit is configured to execute the control method of the air conditioning unit according to any of the above embodiments.
Fig. 5 is a control device of an air conditioning unit according to an embodiment of the present application. Referring to fig. 5, the control apparatus of the present embodiment includes:
a processor 501 and a memory 502, the processor 501 and the memory 502 being connected by a communication bus:
the processor 501 is configured to call and execute a program stored in the memory;
a memory 502 for storing a program for executing at least the control method of the air conditioning unit of any of the above embodiments.
An embodiment of the present application further provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method of the air conditioning unit according to any of the above embodiments are implemented.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (13)
1. A control method of an air conditioning unit, wherein the air conditioning unit comprises at least two compressors, is characterized by comprising the following steps:
detecting a control instruction of the air conditioning unit for exiting an oil return control mode or a defrosting control mode;
if the control instruction is detected, acquiring the running state of a compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors;
if the running state of the compressor is single-compressor running, controlling each compressor of the air conditioning unit to run according to a first target frequency, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal running;
and if the running state of the compressors is that at least two compressors run, controlling each compressor of the air conditioning unit to run according to a second target frequency, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
2. The control method of claim 1, wherein before controlling the compressors of the air conditioning unit to operate at the first target frequency, the control method further comprises:
acquiring the total number of compressors of the air conditioning unit and the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode;
and determining the first target frequency according to the total number of the compressors of the air conditioning unit and the average frequency of the compressors before the air conditioning unit enters an oil return control mode or a defrosting control mode.
3. The control method according to claim 2, wherein the determining the first target frequency according to the obtained total number of compressors of the air conditioning unit and the average frequency of the compressors before the air conditioning unit enters the oil return control mode or the defrosting control mode includes:
calculating the product of the average frequency of each compressor and M before the air conditioning unit enters an oil return control mode or a defrosting control mode to obtain the first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
4. The control method according to claim 1, wherein the lowest frequencies of independent normal operation of each compressor of the air conditioning unit are the same; the first target frequency is the lowest frequency when each compressor independently operates normally.
5. The control method according to any one of claims 1 to 4, wherein before the obtaining of the operating state of the compressor before the air conditioning unit enters the oil return control mode or the defrosting control mode, the control method further comprises:
monitoring the number of the compressors currently operated by the air conditioning unit in real time;
when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit;
and determining the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
6. A control device for an air conditioning unit, comprising:
the detection module is used for detecting a control instruction of the air conditioning unit for exiting the oil return control mode or the defrosting control mode;
the acquisition module is used for acquiring the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode if the control instruction is detected, wherein the running state of the compressor is the running of a single compressor or the running of at least two compressors;
the first control module is used for controlling each compressor of the air conditioning unit to operate according to a first target frequency if the operation state of the compressor is single-compressor operation, wherein the first target frequency is greater than or equal to the lowest frequency of each compressor in normal operation;
and the second control module is used for controlling each compressor of the air conditioning unit to operate according to a second target frequency if the operation state of the compressor is that at least two compressors operate, wherein the second target frequency is the average frequency of each compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode.
7. The control device according to claim 6, further comprising a frequency determination module, configured to obtain a total number of compressors of the air conditioning unit and an average frequency of the compressors before the air conditioning unit enters the oil return control mode or the defrosting control mode before the air conditioning unit operates according to the first target frequency; and determining the first target frequency according to the total number of the compressors of the air conditioning unit and the average frequency of the compressors before the air conditioning unit enters an oil return control mode or a defrosting control mode.
8. The control device according to claim 7, wherein when the first target frequency is determined according to the obtained total number of compressors of the air conditioning unit and an average frequency of the compressors before the air conditioning unit enters the oil return control mode or the defrosting control mode, the frequency determining module is specifically configured to:
calculating the product of the average frequency of each compressor and M before the air conditioning unit enters an oil return control mode or a defrosting control mode to obtain the first target frequency; and the value of M is greater than or equal to the total number of the compressors of the air conditioning unit.
9. The control device of claim 6, wherein the lowest frequencies of the independent normal operation of each compressor of the air conditioning unit are the same; the first target frequency is the lowest frequency when each compressor independently operates normally.
10. The control device according to any one of claims 6 to 9, further comprising an operation state determining module, configured to monitor the number of currently operating compressors of the air conditioning unit in real time before obtaining an operation state of the compressors of the air conditioning unit before entering the oil return control mode or the defrosting control mode; when a control instruction that the air conditioning unit enters an oil return control mode or a defrosting control mode is received, recording the number of compressors currently operated by the air conditioning unit; and determining the running state of the compressor before the air conditioning unit enters an oil return control mode or a defrosting control mode according to the recorded number of the compressors currently running by the air conditioning unit.
11. An air conditioning system, comprising:
the control device of the air conditioning unit and the at least two compressors are respectively connected with the control device of the air conditioning unit;
the control device of the air conditioning unit is used for executing the control method of the air conditioning unit according to any one of claims 1 to 5.
12. A control device for an air conditioning unit, characterized by comprising:
a processor and a memory, the processor and memory connected by a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing a program, and the program is at least used for executing the control method of the air conditioning unit according to any one of claims 1 to 5.
13. A storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, carries out the steps of the control method of an air conditioning group according to any one of claims 1 to 5.
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| JPH04203765A (en) * | 1990-11-29 | 1992-07-24 | Matsushita Seiko Co Ltd | Heat pump type air conditioner |
| CN1888668A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner for improving performance when overloading and controlling method thereof |
| CN102997367B (en) * | 2012-12-05 | 2014-12-03 | 宁波奥克斯电气有限公司 | Refrigerating starting method of multi-split air conditioner |
| CN104180563B (en) * | 2013-05-27 | 2017-06-20 | 珠海格力电器股份有限公司 | Oil return method for heating of multi-split air conditioning system |
| JP2017150689A (en) * | 2016-02-22 | 2017-08-31 | パナソニックＩｐマネジメント株式会社 | Air conditioner |
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