CN109579230B - Compressor frequency distribution method and device - Google Patents
Compressor frequency distribution method and device Download PDFInfo
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- CN109579230B CN109579230B CN201811367513.0A CN201811367513A CN109579230B CN 109579230 B CN109579230 B CN 109579230B CN 201811367513 A CN201811367513 A CN 201811367513A CN 109579230 B CN109579230 B CN 109579230B
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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Abstract
The embodiment of the invention discloses a compressor frequency distribution method and device, relates to the technical field of air conditioners, and not only ensures that a modular air conditioner can safely and reliably run, but also ensures that outdoor units to be operated can exert balanced capacity, thereby achieving the purposes of energy conservation and power saving. The specific scheme is as follows: determining demand frequency, selecting at least two outdoor units to be operated from an outdoor unit group according to the demand frequency, wherein the at least two outdoor units to be operated comprise N compressors, calculating the displacement coefficient of each compressor in the N compressors, determining the module coefficient of each compressor according to the preset frequency corresponding to the outdoor unit to be operated, the number of the compressors contained in the outdoor unit and the displacement coefficient of each compressor, determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the module coefficient of the outdoor unit to be operated, and determining the operation frequency of each compressor according to the sum of the standard frequency of the outdoor unit to be operated and the displacement coefficient of the compressor contained in the outdoor unit to be operated. The embodiment of the invention is used in the process of distributing the frequency of the compressor.
Description
Technical Field
The embodiment of the invention relates to the technical field of air conditioners, in particular to a method and a device for distributing compressor frequency.
Background
The modular air conditioner may include a plurality of outdoor units and a plurality of indoor units, each outdoor unit being provided with a heat exchanger, and one or two compressors. The outdoor units can be connected in parallel to form an outdoor unit, one outdoor unit in the outdoor unit serves as an outdoor main machine, and the rest outdoor units serve as outdoor auxiliary machines.
When the modular air conditioner starts to work, the outdoor host machine can determine the required total frequency according to the refrigerating capacity or the heating capacity required by the normal work of the indoor machines, and determines the outdoor machine to be operated according to the total frequency. And the outdoor unit may equally allocate the total frequency to the compressors included in the outdoor unit to be operated, so that the compressors are operated at the average frequency.
However, different outdoor units may adopt different frame bodies, so that heat exchange areas of heat exchangers in different outdoor units are different, and thus capacities of different outdoor units are different, and considering that different outdoor units may have compressors with different displacement, if the total frequency is averagely distributed to the compressors of the outdoor unit to be operated, the capacities of the outdoor unit to be operated may not be exerted in a balanced manner, for example, some outdoor units may be operated in full load or even in overload, and some outdoor units only exert partial capacities.
Disclosure of Invention
The invention provides a compressor frequency distribution method and device, which not only can ensure that a modular air conditioner can safely and reliably run, but also can ensure that each outdoor unit to be run can exert balanced capacity, thereby achieving the purposes of energy conservation and power saving.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for allocating a compressor frequency, which can be applied to a modular air conditioner including an indoor unit and an outdoor unit, wherein the outdoor unit includes each outdoor unit having a compressor. The method can comprise the following steps: determining the demand frequency according to the heat load required by the indoor unit; selecting at least two outdoor units to be operated from the outdoor unit group according to the required frequency, wherein the at least two outdoor units to be operated comprise N compressors, N is an integer greater than or equal to 2, one outdoor unit corresponds to a preset frequency, the sum of the preset frequencies of the at least two outdoor units to be operated is a target preset frequency, and the target preset frequency is greater than or equal to the required frequency; calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor; determining a module coefficient of the outdoor unit to be operated according to a preset frequency corresponding to the outdoor unit to be operated, the number of compressors of the outdoor unit to be operated and a displacement coefficient of each compressor; determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the module coefficient of the outdoor unit to be operated to the sum of the module coefficients of at least two outdoor units to be operated; and determining the operation frequency of each compressor included in the outdoor unit to be operated according to the ratio of the standard frequency of the outdoor unit to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor unit to be operated.
With reference to the first aspect, in a possible implementation manner, before calculating a ratio of a displacement of each of the N compressors to a reference displacement, the method may further include: and judging whether the discharge volumes of the N compressors are the same. At this time, calculating a ratio of a displacement of each of the N compressors to a reference displacement to obtain a displacement coefficient of each compressor, which may specifically include: and if the displacement of two compressors in the N compressors is determined to be different, calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method may further include: if the discharge capacities of the N compressors are the same, determining the operation frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the preset frequency corresponding to the outdoor unit to be operated to the target preset frequency; and allocating the operation frequency of the outdoor unit to be operated to the compressor included in the outdoor unit to be operated.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, determining a module coefficient of the outdoor unit to be operated according to a preset frequency corresponding to the outdoor unit to be operated, the number of compressors of the outdoor unit to be operated, and a displacement coefficient of each compressor, specifically, the determining may include: the following formula is used:
determining a module coefficient M of an outdoor unit to be operated; wherein A is to be operated
The number of the compressors of the outdoor unit, K is the sum of the discharge capacity coefficients of the A compressors, and F is the preset frequency corresponding to the outdoor unit to be operated.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, allocating an operation frequency of an outdoor unit to be operated to a compressor included in the outdoor unit to be operated may specifically include: when the outdoor unit to be operated comprises one compressor, determining the operation frequency of the outdoor unit to be operated as the operation frequency of the compressor; when it is determined that the outdoor unit to be operated includes at least two compressors, the operation frequency of the outdoor unit to be operated is averagely allocated to the compressors included in the outdoor unit to be operated.
In a second aspect, the present invention provides a compressor frequency distribution apparatus, which can be applied to a modular air conditioner including an indoor unit and an outdoor unit, wherein the outdoor unit includes each outdoor unit having a compressor. The distribution device of the compressor frequency may include: the device comprises a determining unit, a selecting unit and a calculating unit. And the determining unit is used for determining the demand frequency according to the heat load required by the indoor unit. The selection unit is used for selecting at least two outdoor units to be operated from the outdoor unit group according to the required frequency, the at least two outdoor units to be operated comprise N compressors, N is an integer greater than or equal to 2, one outdoor unit corresponds to one preset frequency, the sum of the preset frequencies of the at least two outdoor units to be operated is a target preset frequency, and the target preset frequency is greater than or equal to the required frequency. And the calculating unit is used for calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor. The determining unit is further used for determining a module coefficient of the outdoor unit to be operated according to the preset frequency corresponding to the outdoor unit to be operated, the number of the compressors of the outdoor unit to be operated and the displacement coefficient of each compressor; determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the module coefficient of the outdoor unit to be operated to the sum of the module coefficients of at least two outdoor units to be operated; and determining the operation frequency of each compressor included in the outdoor unit to be operated according to the ratio of the standard frequency of the outdoor unit to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor unit to be operated.
With reference to the second aspect, in a possible implementation manner, the apparatus for allocating a compressor frequency may further include: and a judging unit. And the judging unit is used for judging whether the discharge capacities of the N compressors are the same or not. A computing unit, specifically configured to: and if the displacement of two compressors in the N compressors is determined to be different, calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor.
With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the apparatus for allocating a compressor frequency may further include: and a distribution unit. And the determining unit is further used for determining the operating frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the preset frequency corresponding to the outdoor unit to be operated to the target preset frequency if the discharge capacities of the N compressors are determined to be the same. And a distribution unit for distributing the operation frequency of the outdoor unit to be operated to the compressor included in the outdoor unit to be operated.
With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is specifically configured to: the following formula is used:
determining a module coefficient M of an outdoor unit to be operated; the method comprises the following steps of A, K and F, wherein A is the number of compressors of the outdoor unit to be operated, K is the sum of the discharge capacity coefficients of the A compressors, and F is the corresponding preset frequency of the outdoor unit to be operated.
With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the allocating unit is specifically configured to: when the outdoor unit to be operated comprises one compressor, determining the operation frequency of the outdoor unit to be operated as the operation frequency of the compressor; when it is determined that the outdoor unit to be operated includes at least two compressors, the operation frequency of the outdoor unit to be operated is averagely allocated to the compressors included in the outdoor unit to be operated.
Specific implementations may refer to the behavior function of the compressor frequency allocation device in the compressor frequency allocation method provided in the first aspect or the possible implementations of the first aspect.
In a third aspect, there is provided a compressor frequency distribution device, including: at least one processor, a memory, a communication interface, and a communication bus. The processor is connected with the memory and the communication interface through a communication bus, the memory is used for storing computer-executable instructions, and when the distribution device of the compressor frequency runs, the processor executes the computer-executable instructions stored in the memory, so that the distribution device of the compressor frequency executes the distribution method of the compressor frequency as the first aspect or any one of the possible implementation manners of the first aspect.
In a fourth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions that, when run on an allocation apparatus of compressor frequencies, cause the allocation apparatus of compressor frequencies to perform an allocation method of compressor frequencies as in the first aspect or any one of the possible implementations of the first aspect.
The invention provides a compressor frequency distribution method, which is characterized in that under the condition that at least two outdoor units to be operated are selected according to demand frequency, the at least two outdoor units to be operated comprise N compressors, a module coefficient of each compressor is determined by calculating a discharge capacity coefficient of each compressor in the N compressors, according to preset frequency corresponding to the outdoor units to be operated, the number of the compressors included in the outdoor units and the discharge capacity coefficient of each compressor, the standard frequency of the outdoor units to be operated is determined according to the demand frequency and the ratio of the module coefficient of the outdoor units to be operated to the sum of the module coefficients of the at least two outdoor units to be operated, and finally the operation frequency of each compressor included in the outdoor units to be operated is determined according to the ratio of the standard frequency of the outdoor units to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor units to be operated. In this way, since the preset frequency of the outdoor unit may be the upper limit value of the operation frequency of the outdoor unit, indicating the capacity of the outdoor unit, the capacity exerted by a certain outdoor unit to be operated is: the operation frequency of the outdoor unit to be operated, namely the ratio of the product of the operation frequency of the compressors included in the outdoor unit to the number of the compressors included in the outdoor unit to the preset frequency is equal to the ratio of the required frequency to the sum of the module coefficients of at least two outdoor units to be operated, namely, the capacity exerted by each outdoor unit to be operated is the same, so that the modular air conditioner can safely and reliably operate, and each outdoor unit to be operated can exert balanced capacity, thereby achieving the purposes of saving energy and electricity.
Drawings
Fig. 1 is a schematic diagram illustrating a compressor frequency distribution apparatus according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for allocating compressor frequencies according to an embodiment of the present invention;
FIG. 3 is a flow chart of another compressor frequency allocation method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another compressor frequency distribution device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another compressor frequency distribution device according to an embodiment of the present invention;
fig. 6 is a schematic composition diagram of another compressor frequency distribution device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic composition diagram of a compressor frequency distribution device according to an embodiment of the present invention, and in a specific implementation, the compressor frequency distribution device may be an outdoor unit, which is any one of outdoor units included in an outdoor unit of a modular air conditioner. As shown in fig. 1, the compressor frequency distribution device may include: at least one processor 11, a memory 12, a communication interface 13, and a communication bus 14.
The following describes in detail the various components of the compressor frequency distribution device with reference to fig. 1:
the processor 11 is a control center of the compressor frequency distribution device, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 11 is a Central Processing Unit (CPU), or may be an Application Specific Integrated Circuit (ASlC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
In particular implementations, processor 11 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 1, for example, as one embodiment. Also, as an example, the distribution means of the compressor frequency may include a plurality of processors, such as the processor 11 and the processor 15 shown in fig. 1. Each of these processors may be a Single-core processor (Single-CPU) or a Multi-core processor (Multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
The Memory 12 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 12 may be self-contained and coupled to the processor 11 via a communication bus 14. The memory 12 may also be integrated with the processor 11.
In a specific implementation, the memory 12 is used for storing data in the present invention and software programs for executing the present invention. The processor 11 may perform various functions of the compressor frequency allocation means by running or executing software programs stored in the memory 12 and by calling up data stored in the memory 12.
The communication interface 13 is any device such as a transceiver for communicating with other devices or communication Networks, such as a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The communication interface 13 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.
The communication bus 14 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (ElSA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 1, but it is not intended that there be only one bus or one type of bus.
In order to enable the modular air conditioner to safely and reliably operate and enable each outdoor unit to be operated to exert balanced capacity, so as to achieve the purpose of saving energy and electricity, the embodiment of the invention provides a compressor frequency allocation method, which can be applied to the modular air conditioner, wherein the modular air conditioner can comprise an indoor unit and an outdoor unit, and each outdoor unit of the outdoor unit is provided with a compressor. As shown in fig. 2, the method may include:
201. and determining the demand frequency according to the heat load required by the indoor unit.
When the modular air conditioner starts to work, the distribution device of the compressor frequency can determine the corresponding demand frequency according to the heat load required by the indoor unit and a preset algorithm, wherein the heat load refers to the total cooling capacity or the total heating capacity.
202. And selecting at least two outdoor units to be operated from the outdoor unit group according to the demand frequency, wherein the at least two outdoor units to be operated comprise N compressors.
In a specific implementation, the upper limit value may be determined according to the capacity of the outdoor unit, the number of compressors included in the outdoor unit, and the discharge capacity of each compressor, and the upper limit value corresponding to each outdoor unit is pre-stored in the distribution device of the compressor frequency.
After determining the required frequency, the compressor frequency allocation device may select at least two outdoor units to be operated from the outdoor unit group according to a preset rule, where a sum of preset frequencies of the at least two outdoor units to be operated is a target preset frequency, and the target preset frequency is greater than or equal to the required frequency.
It should be noted that, in the embodiment of the present invention, since it is necessary for each outdoor unit to exert balanced capacity, the method for allocating the frequency of the compressor according to the embodiment of the present invention is only applicable to a scenario where the number of the selected outdoor units to be operated is two or more, and there is no problem of balanced capacity exertion in a scenario where one outdoor unit to be operated is selected according to the required frequency.
203. And calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor.
The reference displacement may be a displacement of any one of the N compressors, or may be a value different from the displacement of the N compressors, and the embodiment of the present invention is not specifically limited herein.
204. And determining the module coefficient of the outdoor unit to be operated according to the preset frequency corresponding to the outdoor unit to be operated, the number of the compressors of the outdoor unit to be operated and the discharge capacity coefficient of each compressor.
Wherein, the compressor frequency distribution device can calculate the product of the displacement coefficient of each compressor and the upper limit value of the operating frequency of the compressor after obtaining the displacement coefficient of each compressor in the N compressorsAnd obtaining the module coefficient of the compressor, and calculating the sum of the module coefficients of the compressors included in the outdoor unit to be operated to obtain the module coefficient of the outdoor unit to be operated. Since the preset frequency corresponding to an outdoor unit, i.e. the upper limit of the operating frequency of the outdoor unit, is averagely allocated to the compressors included in the outdoor unit, and is the upper limit of the operating frequency of each compressor included in the outdoor unit, the compressor frequency allocation device can use the following formula:
and determining the module coefficient M of the outdoor unit to be operated. Wherein, a is the number of compressors included in the outdoor unit to be operated, K is the sum of the displacement coefficients of the a compressors, and F is the preset frequency corresponding to the outdoor unit to be operated.
For example, it is assumed that the demand frequency Fd is 480 hertz (Hz), and the distribution device of the compressor frequency selects four outdoor units to be operated from the outdoor unit group according to the demand frequency, as shown in table 1, the preset frequencies corresponding to the four outdoor units one by one, the number of compressors included in each outdoor unit, and the displacement of each compressor.
TABLE 1
| Number of outdoor unit | 1 | 2 | 3 | 4 |
| Number of compressors | 1 | 1 | 2 | 2 |
| Displacement (cc) | 65 | 50 | 80、65 | 65 |
| Frequency of presetting (Hz) | 90 | 100 | 160 | 200 |
As is apparent from Table 1, N is 6. Assuming that the reference discharge capacity is 65cc, the compressor frequency distribution device calculates the discharge coefficient of the compressor of the outdoor unit No. 1 to be 1, the discharge coefficient of the compressor of the outdoor unit No. 2 to be 50/65 to be 0.77, and the discharge coefficients of the two compressors included in the outdoor unit No. 3 are: the discharge coefficients of the two compressors included in the outdoor unit No. 1, 4, No. 80/65 are both 1.
And the distribution device of the compressor frequency calculates the module coefficient of No. 1 outdoor unit:
module coefficient of outdoor unit No. 2:
module coefficient of outdoor unit No. 3:
module coefficient of outdoor unit No. 4:
it should be noted that, in the embodiment of the present invention, table 1 is described by taking a compressor with different displacement in N compressors as an example, and of course, if the displacement of the N compressors is the same, the compressor frequency may be allocated by steps 201 to 206.
205. And determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the module coefficient of the outdoor unit to be operated to the sum of the module coefficients of at least two outdoor units to be operated.
After determining the module coefficient of the outdoor unit to be operated, the compressor frequency allocation device may use the following formula:
and determining the standard frequency B of the outdoor unit to be operated. Wherein, Fd is the required frequency, M is the module coefficient of one outdoor unit to be operated, and Mmax is the sum of the module coefficients of at least two outdoor units to be operated.
Illustratively, according to the example in step 204, the sum of the module coefficients of four outdoor units to be operated: mmax is 90+77+178.4+200 is 545.4, and the compressor frequency distribution device calculates the standard frequency of the No. 1 outdoor unit:
standard frequency of outdoor unit No. 2:
standard frequency of No. 3 outdoor unit:
standard frequency of No. 4 outdoor unit:
206. and determining the operation frequency of each compressor included in the outdoor unit to be operated according to the ratio of the standard frequency of the outdoor unit to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor unit to be operated.
After determining the standard frequency of the outdoor unit to be operated, the compressor frequency allocation device may determine the ratio of the standard frequency of the outdoor unit to be operated to the sum of the displacement coefficients of the compressors included in the outdoor unit to be operated as the operation frequency of each compressor included in the outdoor unit to be operated. At this time, the operation frequency of the outdoor unit to be operated is a product of the operation frequency of the compressors included therein and the number of the compressors included therein.
Illustratively, according to the example in step 205, the compressor frequency allocation device determines the operating frequency of the compressor of the No. 1 outdoor unit: 79/1 ═ 79, operating frequency of compressor of outdoor unit No. 2: 68/0.77 ═ 88, the operating frequency of each compressor included in outdoor unit No. 3: 157/(1.23+1) ═ 70,the operation frequency of each compressor included in the No. 4 outdoor unit: 176/(1+1) ═ 88. At this time, the operating frequencies of the four outdoor units to be operated are respectively: 79Hz, 88Hz, 140Hz, 176 Hz. The four outdoor units to be operated have the following capabilities:
namely, the four outdoor units to be operated can exert balanced capacity, so that the modular air conditioner can reliably operate, and energy and electricity can be saved.
However, if the demand frequency is equally distributed to the compressors according to the prior art, the sum of the displacement coefficients of the 6 compressors can be calculated as: 1+0.77+1.23+1+1+ 6, and then the average frequency for each compressor was calculated as: 480/6 Hz, the operation frequencies of the four outdoor units to be operated are: 80Hz, 160Hz and 160Hz, and the capacity of the four corresponding outdoor units to be operated is respectively as follows: 89%, 80%, 100% and 80%. It can be seen that according to the distribution method of the prior art, the four outdoor units exert quite unbalanced capacities, and the number 3 outdoor unit is fully loaded, which may affect the reliable operation of the modular air conditioner.
Further, in the embodiment of the present invention, as shown in fig. 3, before the step 203, the following step 207 may be further included:
207. and judging whether the discharge volumes of the N compressors are the same.
After the frequency of the compressors is determined, the frequency divider may determine whether the displacements of the N compressors are all the same, and if the displacements of two of the N compressors are different, the above steps 203 to 206 may be performed. If the N compressors are all at the same displacement, the following steps 208-209 may be performed:
208. and if the discharge capacities of the N compressors are the same, determining the operating frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the preset frequency corresponding to the outdoor unit to be operated to the target preset frequency.
Wherein if it is determined that the displacements of the N compressors are all the same, the compressor frequency distribution means may be adoptedUsing the following equation:
calculating the operation frequency A of any one outdoor unit of at least two outdoor units to be operated, wherein Fd is a required frequency, F is a preset frequency corresponding to one outdoor unit to be operated, and Fmax is a target preset frequency.
For example, it is assumed that the demand frequency Fd is 540Hz, and the distribution device of the compressor frequency selects four outdoor units to be operated from the outdoor unit group according to the demand frequency, as shown in table 2, the preset frequencies corresponding to the four outdoor units one by one, the number of compressors included in each outdoor unit, and the displacement of each compressor.
TABLE 2
| Number of outdoor unit | 1 | 2 | 3 | 4 |
| Number of compressors | 1 | 1 | 2 | 2 |
| Displacement (cc) | 65 | 65 | 65 | 65 |
| Frequency of presetting (Hz) | 90 | 100 | 160 | 200 |
As shown in table 2, N is 6, the target preset frequency: fmax is 90+100+160+200 is 550Hz, and the displacement of 6 compressors is the same and is 65 cc. The compressor frequency distribution device calculates the operating frequency of the No. 1 outdoor unit:
operating frequency of No. 2 outdoor unit:
operating frequency of No. 3 outdoor unit:
operating frequency of No. 4 outdoor unit:
in this way, each outdoor unit to be operated exerts the capacity of:
namely, the four outdoor units to be operated can exert balanced capacity, so that the modular air conditioner can reliably operate, and energy and electricity can be saved.
However, if the demand frequency is equally distributed to the compressors according to the prior art, the average frequency of each compressor is: 540/6 Hz, the operation frequencies of the four outdoor units to be operated are: 90Hz, 180Hz and 180Hz, and the capacity of the four corresponding outdoor units to be operated is respectively as follows: 100%, 90%, 112%, 90%. The operation frequency of the No. 3 outdoor unit exceeds the upper limit value, so that the reliable operation of the modular air conditioner is influenced.
209. And allocating the operation frequency of the outdoor unit to be operated to the compressor included in the outdoor unit to be operated.
The compressor frequency allocation device may allocate the operating frequency of the outdoor unit to be operated to the compressor included therein after determining the operating frequency of the outdoor unit to be operated. Specifically, if the outdoor unit to be operated includes only one compressor, the compressor frequency allocation device may determine the operation frequency of the outdoor unit as the operation frequency of the compressor included therein; if the outdoor unit to be operated includes at least two compressors, the compressor frequency distributing means may equally distribute the operation frequency of the outdoor unit to the compressors it includes.
Illustratively, according to the example in step 208, the operation frequencies of the four outdoor units to be operated are: 88Hz, 98Hz, 157Hz, 196Hz, the compressor frequency distribution device determines that the compressor of the outdoor unit No. 1 operates at 88Hz, the compressor of the outdoor unit No. 2 operates at 98Hz, the compressors of the outdoor units No. 3 operate at 78.5Hz, and the compressors of the outdoor units No. 4 operate at 98 Hz.
The invention provides a compressor frequency distribution method, which is characterized in that under the condition that at least two outdoor units to be operated are selected according to demand frequency, the at least two outdoor units to be operated comprise N compressors, a module coefficient of each compressor is determined by calculating a discharge capacity coefficient of each compressor in the N compressors, according to preset frequency corresponding to the outdoor units to be operated, the number of the compressors included in the outdoor units and the discharge capacity coefficient of each compressor, the standard frequency of the outdoor units to be operated is determined according to the demand frequency and the ratio of the module coefficient of the outdoor units to be operated to the sum of the module coefficients of the at least two outdoor units to be operated, and finally the operation frequency of each compressor included in the outdoor units to be operated is determined according to the ratio of the standard frequency of the outdoor units to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor units to be operated. In this way, since the preset frequency of the outdoor unit may be the upper limit value of the operation frequency of the outdoor unit, indicating the capacity of the outdoor unit, the capacity exerted by a certain outdoor unit to be operated is: the operation frequency of the outdoor unit to be operated, namely the ratio of the product of the operation frequency of the compressors included in the outdoor unit to the number of the compressors included in the outdoor unit to the preset frequency is equal to the ratio of the required frequency to the sum of the module coefficients of at least two outdoor units to be operated, namely, the capacity exerted by each outdoor unit to be operated is the same, so that the modular air conditioner can safely and reliably operate, and each outdoor unit to be operated can exert balanced capacity, thereby achieving the purposes of saving energy and electricity.
The solution provided by the embodiments of the present invention has been described above mainly from the point of view of the distribution means of the compressor frequency. It will be understood that the compressor frequency distribution means, in order to perform the above-mentioned functions, comprise corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The embodiments of the present invention may divide the functional modules of the distribution device of the compressor frequency according to the above method, for example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of dividing each functional module by corresponding functions, fig. 4 shows another possible composition diagram of the distribution device of the compressor frequency involved in the above embodiment, as shown in fig. 4, the distribution device of the compressor frequency may include: a determination unit 31, a selection unit 32 and a calculation unit 33.
The determining unit 31 is configured to execute steps 201, 204, 205, and 206 in the compressor frequency allocation method shown in fig. 2 and step 208 in the compressor frequency allocation method shown in fig. 3 by the allocation device supporting the compressor frequency.
The selection unit 32, the distribution means for supporting the compressor frequency, performs step 202 in the distribution method of the compressor frequency shown in fig. 2.
The calculating unit 33, the allocating means for supporting the compressor frequency, performs step 203 in the allocating method of the compressor frequency shown in fig. 2.
Further, in the embodiment of the present invention, as shown in fig. 5, the apparatus for distributing the frequency of the compressor may further include: a judging unit 34 and an assigning unit 35.
The judging unit 34, the allocating means for supporting the compressor frequency, performs step 207 in the allocating method of the compressor frequency shown in fig. 3.
The distribution unit 35, the distribution means for supporting the compressor frequency, performs step 209 of the distribution method of the compressor frequency shown in fig. 3.
It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
The distribution device of the compressor frequency provided by the embodiment of the invention is used for executing the distribution method of the compressor frequency, so that the same effect as the distribution method of the compressor frequency can be achieved.
In the case of an integrated unit, fig. 6 shows another possible composition diagram of the compressor frequency distribution device referred to in the above-described embodiment. As shown in fig. 6, the compressor frequency distribution apparatus includes: a processing module 41, a communication module 42 and a storage module 43.
The processing module 41 is configured to control and manage the operation of the distribution device of the compressor frequency, for example, the processing module 41 is configured to support the distribution device of the compressor frequency to perform step 201, step 202, step 203, step 204, step 205, step 206 in fig. 2, step 207, step 208, step 209 in fig. 3, and/or other processes for the technologies described herein. The communication module 42 is used to support communication of the compressor frequency allocation device with other network entities. A memory module 43 for storing program codes and data of the distribution means of the compressor frequency.
The processing module 41 may be the processor in fig. 1. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 42 may be the communication interface of fig. 1. The storage module 43 may be the memory of fig. 1.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or partially contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for distributing compressor frequency is applied to a modular air conditioner, the modular air conditioner comprises an indoor unit and an outdoor unit, and each outdoor unit of the outdoor unit is provided with a compressor, and the method comprises the following steps:
determining a demand frequency according to the heat load required by the indoor unit;
selecting at least two outdoor units to be operated from the outdoor unit set according to the required frequency, wherein the at least two outdoor units to be operated comprise N compressors, N is an integer greater than or equal to 2, one outdoor unit corresponds to a preset frequency, the sum of the preset frequencies of the at least two outdoor units to be operated is a target preset frequency, and the target preset frequency is greater than or equal to the required frequency;
calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor;
according to whatDetermining a module coefficient of the outdoor unit to be operated according to the preset frequency corresponding to the outdoor unit to be operated, the number of compressors of the outdoor unit to be operated and the displacement coefficient of each compressor, wherein the module coefficient comprises: the formula is adopted:
determining a module coefficient M of the outdoor unit to be operated; wherein A is the number of compressors of the outdoor unit to be operated, K is the sum of the displacement coefficients of the A compressors, and F is the corresponding preset frequency of the outdoor unit to be operated;
determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the module coefficient of the outdoor unit to be operated to the sum of the module coefficients of the at least two outdoor units to be operated;
and determining the operation frequency of each compressor included in the outdoor unit to be operated according to the ratio of the standard frequency of the outdoor unit to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor unit to be operated.
2. The method of compressor frequency allocation according to claim 1, further comprising, prior to said calculating a ratio of a displacement of each of said N compressors to a reference displacement:
judging whether the discharge capacities of the N compressors are the same;
the calculating a ratio of the displacement of each of the N compressors to a reference displacement to obtain a displacement coefficient of each compressor includes:
and if the displacement of two compressors in the N compressors is different, calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor.
3. The method of allocating compressor frequencies of claim 2, further comprising:
if the discharge capacities of the N compressors are the same, determining the operation frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the preset frequency corresponding to the outdoor unit to be operated to the target preset frequency;
and distributing the operation frequency of the outdoor unit to be operated to a compressor included in the outdoor unit to be operated.
4. The method of claim 3, wherein the allocating the operation frequency of the outdoor unit to be operated to the compressor included in the outdoor unit to be operated comprises:
when the outdoor unit to be operated is determined to comprise one compressor, determining the operation frequency of the outdoor unit to be operated as the operation frequency of the compressor;
when it is determined that the outdoor unit to be operated includes at least two compressors, the operation frequency of the outdoor unit to be operated is averagely allocated to the compressors included in the outdoor unit to be operated.
5. A compressor frequency distribution device applied to a modular air conditioner, wherein the modular air conditioner comprises an indoor unit and an outdoor unit, and each outdoor unit of the outdoor unit is provided with a compressor, the compressor frequency distribution device comprises: the device comprises a determining unit, a selecting unit and a calculating unit;
the determining unit is used for determining the demand frequency according to the heat load required by the indoor unit;
the selection unit is used for selecting at least two outdoor units to be operated from the outdoor unit sets according to the required frequency, wherein the at least two outdoor units to be operated comprise N compressors, N is an integer greater than or equal to 2, one outdoor unit corresponds to a preset frequency, the sum of the preset frequencies of the at least two outdoor units to be operated is a target preset frequency, and the target preset frequency is greater than or equal to the required frequency;
the calculating unit is used for calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor;
the determining unit is further configured to determine a module coefficient of the outdoor unit to be operated according to a preset frequency corresponding to the outdoor unit to be operated, the number of compressors of the outdoor unit to be operated, and a displacement coefficient of each compressor; determining the standard frequency of the outdoor unit to be operated according to the demand frequency and the ratio of the module coefficient of the outdoor unit to be operated to the sum of the module coefficients of the at least two outdoor units to be operated; determining the operation frequency of each compressor included in the outdoor unit to be operated according to the ratio of the standard frequency of the outdoor unit to be operated to the sum of the discharge capacity coefficients of the compressors included in the outdoor unit to be operated;
the determining unit is specifically configured to: the formula is adopted:
determining a module coefficient M of the outdoor unit to be operated; wherein, a is the number of the compressors of the outdoor unit to be operated, K is the sum of the displacement coefficients of the a compressors, and F is the preset frequency corresponding to the outdoor unit to be operated.
6. The distribution device of compressor frequencies of claim 5, further comprising: a judgment unit;
the judging unit is used for judging whether the discharge capacities of the N compressors are the same or not;
the computing unit is specifically configured to: and if the displacement of two compressors in the N compressors is different, calculating the ratio of the displacement of each compressor in the N compressors to the reference displacement to obtain the displacement coefficient of each compressor.
7. The distribution device of compressor frequencies of claim 6, further comprising: a distribution unit;
the determining unit is further configured to determine an operating frequency of the outdoor unit to be operated according to the demand frequency and a ratio of a preset frequency corresponding to the outdoor unit to be operated to the target preset frequency if it is determined that the discharge capacities of the N compressors are all the same;
the distribution unit is configured to distribute the operating frequency of the outdoor unit to be operated to the compressor included in the outdoor unit to be operated.
8. The distribution device of compressor frequencies of claim 7, characterized in that said distribution unit is specifically configured to:
when the outdoor unit to be operated is determined to comprise one compressor, determining the operation frequency of the outdoor unit to be operated as the operation frequency of the compressor;
when it is determined that the outdoor unit to be operated includes at least two compressors, the operation frequency of the outdoor unit to be operated is averagely allocated to the compressors included in the outdoor unit to be operated.
9. A device for distributing the frequency of a compressor, characterized in that it comprises: a processor, a memory, a communication interface, and a communication bus;
the processor is connected with the memory and the communication interface through the communication bus, the memory is used for storing computer execution instructions, and when the distribution device of the compressor frequency is operated, the processor executes the computer execution instructions stored by the memory so as to enable the distribution device of the compressor frequency to execute the distribution method of the compressor frequency according to any one of claims 1 to 4.
10. A computer storage medium, comprising computer executable instructions which, when run on a compressor frequency allocation apparatus, cause the compressor frequency allocation apparatus to perform the compressor frequency allocation method of any one of claims 1-4.
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