CN112396764A - Throttling device-based household metering and charging method and device for multi-split air conditioner - Google Patents
Throttling device-based household metering and charging method and device for multi-split air conditioner Download PDFInfo
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- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/001—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity for gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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Abstract
The embodiment of the invention provides a throttling device-based household metering and charging method and device for a multi-split air conditioner, wherein the method comprises the steps of determining the equivalent channel area of a throttling device according to the type of the throttling device corresponding to each indoor unit; acquiring the power consumption of the outdoor unit and the operation parameters of each indoor unit; calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit; calculating the refrigeration/heat quantity of each indoor unit in the operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of the inlet refrigerant and the enthalpy value of the outlet refrigerant; and according to the energy type charging principle, carrying out household charging of the multi-split air conditioner. The invention not only has simple and convenient operation and good reliability, but also can accurately measure the refrigeration/heat quantity of each indoor unit in the operation time period, thereby being convenient for realizing household fair charging of the multi-split air conditioner based on the energy type charging principle.
Description
Technical Field
The invention relates to the technical field of air conditioner charging, in particular to a throttling device-based household metering and charging method and device for a multi-split air conditioner.
Background
At present, a multi-split air conditioning system is used as a multi-terminal refrigerating/heating system with variable refrigerant flow, is flexible to control, saves energy, is low in operating cost, and is increasingly widely applied to small and medium-sized buildings. In order to realize the measurement and management of building energy consumption, the measurement of the performance of the multi-split air conditioning system and the measurement of energy consumption are particularly important.
The traditional household charging method based on the multi-split air conditioning system comprises an area allocation method and a time type charging method. The area allocation method is to allocate the electric quantity of the air conditioning unit according to the use area of the user, but the area allocation method does not consider the use habit of the user, so that the user is likely to consume maliciously and waste energy. The time type charging method is to allocate the electric quantity of the air conditioning unit according to the service time of the user, but the time type charging method only adds the service time of the user without considering the refrigeration/heat output by the indoor unit, thereby affecting the comfort experience of the user and easily causing disputes between property and the user.
Currently, based on the comprehensive consideration of the usage habits and comfort experiences of users, an energy-based charging method is proposed to realize individual charging according to the refrigeration/heat provided by each indoor unit. In one embodiment, the total cooling/heating capacity of the multi-split air conditioning system is accurately calculated according to the energy balance relationship at the compressor, but the measurement research on the performance of each indoor unit corresponding to the multi-split air conditioning system is relatively less, the actual cooling/heating capacity of each indoor unit is unknown, and therefore, the energy-type household fair charging is difficult to realize according to the actual cooling/heating capacity of each indoor unit. In another embodiment, the refrigeration/heat quantity of the indoor unit is calculated according to an air side heat transfer equation, but parameters such as a heat transfer coefficient, a heat exchange area, an indoor unit air volume and the like involved in the calculation process are difficult to accurately determine, so that a measurement result of the refrigeration/heat quantity of each indoor unit is greatly influenced.
In the actual operation process, the multi-split air conditioning system relates to various operation parameters which are convenient to measure directly, and the operation parameters have a relatively close association relation with the refrigeration/heat of each indoor unit, but at present, the operation parameters are difficult to be fully and comprehensively utilized to predict the refrigeration/heat of each indoor unit quickly and accurately, so that the household fair charging is difficult to be carried out based on the energy type charging principle.
Disclosure of Invention
The embodiment of the invention provides a throttling device-based household metering and charging method and device for a multi-split air conditioner, which are used for solving the problem that household fair charging is difficult to be carried out based on an energy type charging principle because the refrigeration/heat of each indoor unit is difficult to calculate by using the directly measurable operating parameters of the multi-split air conditioner at present.
The embodiment of the invention provides a throttling device-based household metering and charging method for a multi-split air conditioner, which comprises the following steps: determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit; acquiring the power consumption of an outdoor unit and the operation parameters of each indoor unit; calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and carrying out household metering of the multi-split air conditioner; according to an energy type charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period, and carrying out household charging on the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant of the indoor unit, the temperature of the outlet refrigerant, the running time of the indoor unit, and the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
According to the household metering and charging method of the multi-split air conditioner based on the throttling device, according to the type of the throttling device corresponding to each indoor unit, the equivalent channel area of the throttling device is determined, and the method comprises the following steps: under the condition that the throttling device is an electronic expansion valve, determining the equivalent passage area of the electronic expansion valve based on the opening degree of the electronic expansion valve; under the condition that the throttling device is a thermostatic expansion valve, determining the equivalent passage area of the thermostatic expansion valve based on the superheat degree or the supercooling degree of the refrigerant passing through the thermostatic expansion valve; in the case where the throttling means is a capillary tube, the equivalent passage area of the capillary tube is determined based on the specification of the capillary tube.
According to the household metering and charging method of the multi-split air conditioner based on the throttling device, according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device, the method for calculating the refrigerant mass flow of each indoor unit comprises the following steps:
determining the flow coefficient of the throttling device corresponding to each indoor unit:
calculating the refrigerant mass flow of each indoor unit by adopting the following formula:
wherein, CDiA flow coefficient representing the throttling device; mriRepresents a refrigerant mass flow; a. b represents a correlation coefficient corresponding to the physical properties of the refrigerant; v. ofviRepresenting the specific volume of the refrigerant at the inlet of the throttling device; p is a radical ofviRepresents the inlet pressure of the throttling device; p is a radical ofvoRepresents the outlet pressure of the restriction; a. theviRepresenting the equivalent passage area of the restriction device.
According to an embodiment of the throttling device-based household metering and charging method for the multi-split air conditioner, according to an energy type charging principle, power consumption of an outdoor unit is split according to refrigeration/heat of each indoor unit in an operation time period, and household charging of the multi-split air conditioner is performed, and the household metering and charging method comprises the following steps: determining the distribution coefficient of the outdoor unit power consumption to each indoor unit according to the refrigeration/heat quantity of each indoor unit and the outdoor unit power consumption in the operation time period; and according to the distribution coefficient and the power consumption of the outdoor unit, carrying out household charging of the multi-split air conditioner.
According to the throttling device-based household metering and charging method for the multi-split air conditioner, the distribution coefficient is calculated according to the following formula:
wherein, for the ith indoor unit in the multi-split air conditioning system with n indoor units in total, fiIndicating the respective distribution coefficient, Q, of each indoor unitiThe instantaneous cooling/heating quantity of each indoor unit is shown, and the tau represents the running time of each indoor unit;
correspondingly, the power consumption distributed by each indoor unit is calculated according to the product of the distribution coefficient and the power consumption of the outdoor unit, so that the household charging of the multi-split air conditioner is carried out.
The embodiment of the invention also provides a throttling device-based household metering and charging device of a multi-split air conditioner, which comprises the following components: the equivalent channel area determining module is used for determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit; the parameter acquisition module is used for acquiring the power consumption of the outdoor unit and the operation parameters of the indoor units; the first calculation module is used for calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; the second calculation module is used for calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and performing household metering of the multi-split air conditioner; the household charging module is used for splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period according to an energy type charging principle and performing household charging of the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant, the temperature of the outlet refrigerant and the running time of the indoor unit are respectively equal to the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
The embodiment of the invention also provides electronic equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the steps of the household metering and charging method of the multi-split air conditioner based on the throttling device are realized.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the methods for metering and charging the household of the multi-split air conditioner based on the throttling device.
According to the method and the device for metering and charging the split-users of the multi-split air conditioner based on the throttling device, the equivalent channel area of the throttling device is determined according to the type of the throttling device corresponding to each indoor unit, the refrigerant mass flow, the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant of each indoor unit can be calculated according to the operation parameters of each indoor unit and the equivalent channel area of the corresponding throttling device, so that the refrigeration/heat of each indoor unit in an operation time period can be calculated according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of the inlet refrigerant and the enthalpy value of the outlet refrigerant, and the split-users charging of the multi-split air conditioner can be carried out according to an energy type charging principle on the basis of the power consumption of.
Therefore, the invention has simple operation and good reliability, can accurately measure the refrigeration/heat of each indoor unit in the operation time period, and is convenient for realizing household fair charging based on the energy type charging principle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart illustrating a household metering and charging method of a multi-split air conditioner based on a throttling device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multi-split air conditioning system according to an embodiment of the present invention;
FIG. 3 is a graph of the fit of the passage area of an electronic expansion valve as a function of its opening degree according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a household metering and charging device of a multi-split air conditioner based on a throttling device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic flow chart of a household metering and charging method of a multi-split air conditioner based on a throttling device according to this embodiment; fig. 2 is a schematic structural diagram of the multi-split air conditioning system shown in the present embodiment.
The present embodiment provides a household metering and billing method for a multi-split air conditioner based on a throttling device, and in a preferred embodiment, the household metering and billing method for a multi-split air conditioner is applied to a multi-split air conditioner system as shown in fig. 2, the multi-split air conditioner system comprises a compressor 210, a four-way reversing valve 220, an outdoor unit 230 and a plurality of indoor units 240, an exhaust port of the compressor 210 is communicated with an inlet of the four-way reversing valve 220, a first outlet of the four-way reversing valve 220 is communicated with an inlet of a corresponding first heat exchanger of the outdoor unit 230, an outlet of the first heat exchanger is provided with a first expansion valve 260 and is communicated with an inlet of a corresponding second heat exchanger of each indoor unit 240 through the first expansion valve 260, an inlet of the second heat exchanger of each indoor unit 240 is provided with a second expansion valve 270, and an outlet of the second heat exchanger of each indoor unit 240, the third outlet of the four-way reversing valve 220 is connected to the inlet of the gas-liquid separator 250, and the outlet of the gas-liquid separator 250 is connected to the suction port of the compressor 210, wherein the left side of the partition wall in fig. 2 represents the indoor space, the right side of the partition wall represents the outdoor space, and the first expansion valve 260 and the second expansion valve 270 may be any of electronic expansion valves, thermal expansion valves, capillary tubes, and other throttling devices known in the art.
As shown in fig. 1, the operation steps of the metering and charging method for the household-based multi-split air conditioner based on the throttling device in the embodiment include:
Specifically, in step 110 shown in this embodiment, determining an equivalent passage area of a throttling device according to a type of the throttling device corresponding to each indoor unit specifically includes:
determining the equivalent passage area of the electronic expansion valve based on the opening degree of the electronic expansion valve under the condition that the throttling device is the electronic expansion valve; wherein, the equivalent passage area A of the electronic expansion valveviIs about the opening degree OP of the electronic expansion valveiMonotonic function of, i.e. Avi＝f(OPi) Fig. 3 is a graph showing a fitting curve of the passage area of the electronic expansion valve as a function of the opening degree thereof. The ordinate in fig. 3 represents the passage area of the electronic expansion valve in mm2(ii) a The abscissa represents the opening degree of the electronic expansion valve in units of PLS.
In the case where the throttling means is a thermostatic expansion valve, the superheat SH based on the refrigerant passing through the thermostatic expansion valveiOr super-cooling degree SCiDetermining the equivalent passage area A of the thermostatic expansion valvevi(ii) a Wherein the content of the first and second substances,equivalent passage area A of thermostatic expansion valveviIs related to the degree of superheat SH of the refrigerant passing therethroughiMonotonic function of, i.e. Avi＝f(SHi) Meanwhile, the equivalent passage area A of the thermostatic expansion valveviAlso with respect to the degree of supercooling SC of the refrigerant passing therethroughiMonotonic function of, i.e. Avi＝f(SCi). It should be noted that in this scenario, a fitting function of the equivalent passage area of the thermostatic expansion valve to its superheat or subcooling may also be determined based on actual test data.
In the case that the throttling device is a capillary tube, the equivalent passage area of the capillary tube can be regarded as a fixed value, so that the equivalent passage area of the capillary tube can be directly determined by looking up relevant parameters related to the capillary tube based on the specification of the capillary tube.
Meanwhile, in step 130 of this embodiment, the refrigerant mass flow rate M of each indoor unit is calculated based on the operation parameters of each indoor unit and the equivalent passage area of the throttle deviceriInlet refrigerant enthalpy value hin,iAnd outlet refrigerant enthalpy hout,i(ii) a Including but not limited to the steps shown below:
in one embodiment, the flow coefficient of the throttling device corresponding to each indoor unit may be determined by the following formula:
accordingly, the refrigerant mass flow rate of each indoor unit is calculated by the following formula:
wherein, CDiA flow coefficient representing the throttling device; mriRepresents a refrigerant mass flow; a. b represents a correlation coefficient corresponding to the physical properties of the refrigerant; v. ofviRepresenting the specific volume of the refrigerant at the inlet of the throttling device; v. ofvoIndicating outlet of throttleSpecific volume of refrigerant; p is a radical ofviRepresents the inlet pressure of the throttling device; p is a radical ofvoRepresents the outlet pressure of the restriction; a. theviRepresenting the equivalent passage area of the restriction device.
In one specific embodiment, a may be 0.02005, and b may be 6.34, so that the flow coefficient of the throttling device can be obtained as shown in the following formula:
it should be noted here that the present embodiment is not limited to obtaining the flow coefficient of the throttling device using the above formula, and the flow coefficient C of the throttling deviceDiOther forms of formula determination are also possible.
The inlet pressure p of the throttle device corresponding to each indoor unit shown in this embodiment is within the allowable range of the errorviThe discharge pressure of the compressor or the pressure of the gas pipe on the discharge side of the compressor can be used for replacement; accordingly, the outlet pressure p of the throttle devicevoSuction pressure or evaporation pressure of the compressor may be used instead.
Meanwhile, the enthalpy value h of the inlet refrigerant of each indoor unit shown in the present embodimentin,iAnd the enthalpy value h of the outlet refrigerantout,iCan be determined according to the refrigerant temperature and pressure corresponding to the inlet/outlet side of each indoor unit.
Further, in step 140 of the present embodiment, the refrigerant mass flow rate M of each indoor unit is determined according to the refrigerant mass flow rate MriAnd inlet refrigerant enthalpy hin,iAnd the enthalpy value h of the outlet refrigerantout,iCalculating the refrigeration/heat quantity of each indoor unit in the operation time period by using the difference, specifically comprising the following steps:
under the refrigeration working condition of each indoor unit, the refrigeration capacity Q of each indoor unitc,iThe following formula can be used for calculation:
Qci＝Mri(hout,i-hin,i)；
when each indoor unit is in heating working condition, the refrigerating capacity Q of each indoor unith,iCan be used asThe following formula calculates:
Qhi＝Mri(hin,i-hout,i)。
further, in step 150 shown in this embodiment, according to the energy-based charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in the operation time period, and performing household charging of the multi-split air conditioner specifically includes:
determining the distribution coefficient of the outdoor unit power consumption to each indoor unit according to the refrigeration/heat of each indoor unit and the outdoor unit power consumption in the operation time period;
and according to the distribution coefficient and the power consumption of the outdoor unit, carrying out household charging of the multi-split air conditioner.
Specifically, the distribution coefficient shown in this embodiment is calculated according to the following formula:
wherein, for the ith indoor unit in the multi-split air conditioning system with n indoor units in total, fiIndicating the respective distribution coefficient, Q, of each indoor unitiThe instantaneous cooling/heating amount of each indoor unit is represented, and τ represents the operation time of each indoor unit.
Under the refrigeration working condition of each indoor unit, the distribution coefficient f under the refrigeration working condition can be obtainedci：
Wherein Q isciAnd the instantaneous refrigerating capacity of each indoor unit is represented.
Under the heating working condition of each indoor unit, the distribution coefficient f under the heating working condition can be obtainedhi：
Wherein Q ishiIndicating the instantaneous heating capacity of each indoor unit.
Accordingly, under the cooling condition, the power consumption P allocated to each indoor unit can be obtained as shown in the following formulaci,outWherein P isci,out＝fci·Pout。
Under the heating condition, the power consumption P distributed by each indoor unit can be obtained as shown in the following formulahi,outWherein P ishi,out＝fhi·Pout。
As shown in fig. 4, based on the improvement of the foregoing embodiment, this embodiment further provides a household metering and charging device for a multi-split air conditioner based on a throttling device, including: an equivalent channel area determining module 410, configured to determine an equivalent channel area of a throttling device according to a type of the throttling device corresponding to each indoor unit; a parameter obtaining module 420, configured to obtain power consumption of the outdoor unit and operation parameters of each indoor unit; the first calculation module 430 is used for calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; the second calculation module 440 is used for calculating the refrigeration/heat of each indoor unit in the operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of the inlet refrigerant and the enthalpy value of the outlet refrigerant, and performing household metering of the multi-split air conditioner; the household charging module 450 is used for splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in the operation time period according to the energy type charging principle, and performing household charging of the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant, the temperature of the outlet refrigerant and the running time of the indoor unit correspond to the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device of the indoor unit.
As shown in fig. 5, this embodiment further illustrates an entity structure schematic diagram of an electronic device, where the electronic device may include: a processor (processor)510, a communication Interface (Communications Interface)520, a memory (memory)530 and a communication bus 540, wherein the processor 510, the communication Interface 520 and the memory 530 communicate with each other via the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the throttling device-based household metering and charging method for the multi-split air conditioner, which includes: determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit; acquiring the power consumption of an outdoor unit and the operation parameters of each indoor unit; calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and carrying out household metering of the multi-split air conditioner; according to an energy type charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period, and carrying out household charging on the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant of the indoor unit, the temperature of the outlet refrigerant, the running time of the indoor unit, and the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
Furthermore, the logic instructions in the memory 530 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solutions shown in the present embodiments may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present embodiment further provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer is capable of executing the throttling device-based multi-split air conditioner household metering and charging method provided by the foregoing method embodiments, where the method includes: determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit; acquiring the power consumption of an outdoor unit and the operation parameters of each indoor unit; calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and carrying out household metering of the multi-split air conditioner; according to an energy type charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period, and carrying out household charging on the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant of the indoor unit, the temperature of the outlet refrigerant, the running time of the indoor unit, and the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to perform the throttling device-based household metering and charging method for a multi-split air conditioner provided in the foregoing embodiments, where the method includes: determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit; acquiring the power consumption of an outdoor unit and the operation parameters of each indoor unit; calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device; calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and carrying out household metering of the multi-split air conditioner; according to an energy type charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period, and carrying out household charging on the multi-split air conditioner; wherein the operating parameters include: the temperature of the inlet refrigerant of the indoor unit, the temperature of the outlet refrigerant, the running time of the indoor unit, and the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A household metering and charging method of a multi-split air conditioner based on a throttling device is characterized by comprising the following steps: determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit;
acquiring the power consumption of an outdoor unit and the operation parameters of each indoor unit;
calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device;
calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and carrying out household metering of the multi-split air conditioner;
according to an energy type charging principle, splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period, and carrying out household charging on the multi-split air conditioner;
wherein the operating parameters include: the temperature of the inlet refrigerant of the indoor unit, the temperature of the outlet refrigerant, the running time of the indoor unit, and the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
2. The household metering and charging method for the multi-split air conditioner based on the throttling device as claimed in claim 1, wherein the determining the equivalent passage area of the throttling device according to the type of the throttling device corresponding to each indoor unit comprises:
under the condition that the throttling device is an electronic expansion valve, determining the equivalent passage area of the electronic expansion valve based on the opening degree of the electronic expansion valve;
under the condition that the throttling device is a thermostatic expansion valve, determining the equivalent passage area of the thermostatic expansion valve based on the superheat degree or the supercooling degree of the refrigerant passing through the thermostatic expansion valve;
in the case where the throttling means is a capillary tube, the equivalent passage area of the capillary tube is determined based on the specification of the capillary tube.
3. The throttling device-based household metering and charging method for the multi-split air conditioner according to claim 1, wherein the calculating of the refrigerant mass flow of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device comprises: determining the flow coefficient of the throttling device corresponding to each indoor unit;
calculating the refrigerant mass flow of each indoor unit by adopting the following formula:
wherein, CDiA flow coefficient representing the throttling device; mriRepresents a refrigerant mass flow; a. b represents a correlation coefficient corresponding to the physical properties of the refrigerant; v. ofviRepresenting the specific volume of the refrigerant at the inlet of the throttling device; p is a radical ofviRepresents the inlet pressure of the throttling device; p is a radical ofvoRepresents the outlet pressure of the restriction; a. theviRepresenting the equivalent passage area of the restriction device.
4. The throttling device-based household metering and charging method for the multi-split air conditioner according to any one of claims 1 to 3, wherein according to an energy type charging principle, according to the refrigeration/heat of each indoor unit in an operation time period, the power consumption of the outdoor unit is split, and household charging of the multi-split air conditioner is performed, and the method comprises the following steps:
determining the distribution coefficient of the outdoor unit power consumption to each indoor unit according to the refrigeration/heat quantity of each indoor unit and the outdoor unit power consumption in the operation time period;
and according to the distribution coefficient and the power consumption of the outdoor unit, carrying out household charging of the multi-split air conditioner.
5. The throttling device-based household metering and charging method for the multi-split air conditioner according to claim 4, wherein the distribution coefficient is calculated according to the following formula:
wherein, for the ith indoor unit in the multi-split air conditioning system with n indoor units in total, fiIndicating the respective distribution coefficient, Q, of each indoor unitiThe instantaneous cooling/heating quantity of each indoor unit is shown, and the tau represents the running time of each indoor unit;
correspondingly, the power consumption distributed by each indoor unit is calculated according to the product of the distribution coefficient and the power consumption of the outdoor unit, so that the household charging of the multi-split air conditioner is carried out.
6. The utility model provides a many online air conditioners divides family metering and charging device based on throttling arrangement which characterized in that includes: the equivalent channel area determining module is used for determining the equivalent channel area of the throttling device according to the type of the throttling device corresponding to each indoor unit;
the parameter acquisition module is used for acquiring the power consumption of the outdoor unit and the operation parameters of the indoor units;
the first calculation module is used for calculating the refrigerant mass flow, the inlet refrigerant enthalpy value and the outlet refrigerant enthalpy value of each indoor unit according to the operation parameters of each indoor unit and the equivalent channel area of the throttling device;
the second calculation module is used for calculating the refrigeration/heat of each indoor unit in an operation time period according to the refrigerant mass flow of each indoor unit and the difference between the enthalpy value of an inlet refrigerant and the enthalpy value of an outlet refrigerant, and performing household metering of the multi-split air conditioner;
the household charging module is used for splitting the power consumption of the outdoor unit according to the refrigeration/heat of each indoor unit in an operation time period according to an energy type charging principle and performing household charging of the multi-split air conditioner;
wherein the operating parameters include: the temperature of the inlet refrigerant, the temperature of the outlet refrigerant and the running time of the indoor unit are respectively equal to the inlet pressure, the outlet pressure, the specific volume of the inlet refrigerant and the specific volume of the outlet refrigerant of the throttling device corresponding to the indoor unit.
7. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the throttling device based household metering and charging method for the multi-split air conditioner according to any one of claims 1 to 5.
8. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, implements the steps of the throttling device based household metering and charging method for a multi-split air conditioner according to any one of claims 1 to 5.
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