CN113028569A - Allocation charging method and device for multi-connected air conditioner and multi-connected air conditioner - Google Patents
Allocation charging method and device for multi-connected air conditioner and multi-connected air conditioner Download PDFInfo
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- 239000003507 refrigerant Substances 0.000 claims abstract description 105
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- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims description 41
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- 238000001514 detection method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 10
- 238000004378 air conditioning Methods 0.000 description 4
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/003—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity for electricity
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a multi-connected air conditioner allocation charging method and device and a multi-connected air conditioner, wherein the multi-connected air conditioner allocation charging method comprises the following steps: detecting the inlet temperature and the outlet temperature of a coil pipe of each indoor unit of the multi-split air conditioner; determining the enthalpy value of the refrigerant at the inlet and outlet of the coil of each indoor unit based on the inlet temperature and the outlet temperature; and determining the cold capacity ratio of each indoor unit based on the enthalpy value of the refrigerant at the inlet and outlet of the coil pipe of each indoor unit, and determining the shared electric quantity of each indoor unit according to the cold capacity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner. According to the invention, the shared electric quantity of the indoor unit is calculated according to the cooling capacity ratio of the indoor unit and the total power consumption of the multi-connected air conditioner, so that the electric charge sharing of the indoor unit is more fit with the actual power consumption, and the calculation accuracy of the shared charging of the multi-connected air conditioner is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a sharing and charging method and device of a multi-connected air conditioner and the multi-connected air conditioner.
Background
The multi-split air conditioner refers to a multi-split air conditioner in which an outdoor unit is connected with two or more indoor units through a pipe, and at present, the multi-split air conditioner is widely used in commercial buildings or public buildings, but in the commercial occasions using the multi-split air conditioner, the operating electricity charges of an air conditioning system need to be settled together with different using units sharing the outdoor unit in the same area, so that the shared electric quantity of each indoor unit needs to be calculated according to the total electricity consumption of the multi-split air conditioner when the air conditioner is charged.
The existing multi-connected air conditioner charging technology mainly fits the cold input of each indoor unit to share the power consumption according to the parameters of the rated capacity, the running time and the like of each indoor unit. This calculation method does not take into account the influence factors such as the set temperature of the indoor unit and the room load, and causes a certain deviation in the calculated allocated power consumption. Therefore, the existing multi-connected air conditioner charging technology has the problem of low calculation accuracy.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a device for sharing and charging a multi-connected air conditioner and the multi-connected air conditioner.
According to an embodiment of the present invention, on the one hand, a shared charging method for a multi-connected air conditioner is provided, which includes: detecting the inlet temperature and the outlet temperature of a coil pipe of each indoor unit of the multi-split air conditioner; determining the enthalpy value of the refrigerant at the inlet and the outlet of the coil of each indoor unit based on the inlet temperature and the outlet temperature; and determining the cold quantity ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil pipe inlet and outlet of each indoor unit, and determining the shared electric quantity of each indoor unit according to the cold quantity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
By adopting the technical scheme, the temperature of the coil pipe inlet and outlet of each indoor unit of the multi-connected air conditioner is actually detected, the enthalpy value of the refrigerant at the inlet and outlet of the coil pipe is determined based on the temperature of the inlet and outlet of the coil pipe, the cold capacity occupation ratio of each indoor unit is determined according to the enthalpy value of the refrigerant at the inlet and outlet of the coil pipe of the indoor unit, the cold capacity occupation ratio is calculated by comprehensively considering the actual use condition of the indoor unit, and the reasonability of calculation of the cold capacity occupation ratio.
Preferably, the step of determining the enthalpy of the refrigerant at the coil inlet and outlet of each indoor unit based on the inlet temperature and the outlet temperature includes: detecting the evaporation temperature of each indoor unit of the multi-connected air conditioner; inquiring the enthalpy value of the refrigerant at the coil pipe inlet of the indoor unit from a refrigerant state parameter table based on the inlet temperature and the evaporation temperature; and inquiring the enthalpy value of the refrigerant at the coil pipe outlet of the indoor unit from the refrigerant state parameter table based on the outlet temperature and the evaporation temperature.
By adopting the technical scheme, the enthalpy value of the refrigerant at the inlet of the coil pipe is determined according to the inlet temperature and the evaporation temperature of the coil pipe, the enthalpy value of the refrigerant at the outlet of the coil pipe is determined according to the outlet temperature and the evaporation temperature of the coil pipe, the actual load of an indoor unit in the running process of the multi-connected air conditioner is fully considered, and the apportionment charging rationality of the multi-connected air conditioner is improved.
Preferably, the step of detecting the evaporation temperature of each indoor unit of the multi-connected air conditioner includes: detecting pressure values of evaporators of all indoor units of the multi-connected air conditioner based on pressure sensors, and determining evaporation temperatures of all the indoor units based on the pressure values; or detecting the evaporation temperature of each indoor unit based on a temperature sensor arranged in the middle of a coil of each indoor unit.
By adopting the technical scheme, the pressure value of the evaporator of each indoor unit is detected based on the pressure sensor, the evaporation temperature of the indoor unit is determined according to the pressure value of the evaporator, or the evaporation temperature of each indoor unit is obtained by directly detecting the temperature in the middle of the coil pipe based on the temperature sensor, so that the evaporation temperature of each indoor unit can be accurately detected, and accurate basic data are provided for further determining the enthalpy values of the refrigerants at the inlet and the outlet of the coil pipe.
Preferably, the step of determining the cold capacity ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil inlet and outlet of each indoor unit includes: calculating the difference between the enthalpy value of the refrigerant at the outlet of the coil pipe of each indoor unit and the enthalpy value of the refrigerant at the inlet of the coil pipe to obtain the enthalpy value difference corresponding to each indoor unit; and acquiring the flow proportion corresponding to each indoor unit, and determining the cold capacity ratio of each indoor unit based on the enthalpy difference value and the flow proportion corresponding to each indoor unit.
By adopting the technical scheme, the flow proportion of the refrigerant corresponding to each indoor unit is obtained, the cold quantity ratio of each indoor unit is determined based on the enthalpy value difference and the flow proportion of each indoor unit, and the accuracy and the reasonability of determining the cold quantity ratio of each indoor unit are improved.
Preferably, the step of obtaining the flow rate ratio corresponding to each indoor unit includes: acquiring the opening degree and the caliber of an expansion valve corresponding to each indoor unit; and calculating the flow proportion corresponding to each indoor unit based on the opening of the expansion valve and the aperture of the expansion valve.
By adopting the technical scheme, the flow proportion of the refrigerant flowing into each indoor unit is calculated according to the opening degree and the caliber of the expansion valve of each indoor unit, the flow distribution condition of each indoor unit can be accurately calculated when the distributed electric quantity of each indoor unit is determined, and the distribution charging accuracy of the multi-connected air conditioner is improved.
Preferably, the step of calculating the flow rate ratio corresponding to each indoor unit based on the opening degree of the expansion valve and the aperture of the expansion valve includes: inputting the opening degree and the caliber of an expansion valve corresponding to the indoor unit into a first calculation formula to obtain a flow proportion corresponding to the indoor unit; wherein the first calculation formula is:
rnis the flow ratio of the nth indoor unit, PnOpening degree of expansion valve of the nth indoor unit, dnThe diameter of the expansion valve of the nth indoor unit, and m is the number of the indoor units included in the multi-connected air conditioner.
By adopting the technical scheme, the refrigerant flow proportion corresponding to each indoor unit is calculated based on the first calculation formula, the charging allocation of the multi-connected air conditioner can be associated with the structural characteristics of the multi-connected air conditioner, the charging mode is attached to the structural characteristics of the multi-connected air conditioner, and the calculation error of the allocated power consumption is reduced.
Preferably, the step of determining the ratio of the cooling capacity of each indoor unit based on the enthalpy difference and the flow rate ratio corresponding to each indoor unit includes: inputting the enthalpy difference value and the flow ratio corresponding to the indoor unit into a second calculation formula to obtain the cold volume ratio of the indoor unit; wherein the second calculation formula is:
Rnis the cold capacity of the nth indoor unit, delta hnIs the enthalpy difference, r, corresponding to the nth indoor unitnAnd m is the flow ratio of the nth indoor unit, and the number of the indoor units included in the multi-connected air conditioner.
By adopting the technical scheme, the cold capacity ratio of each indoor unit is calculated based on the second calculation formula, the structural characteristics of the multi-connected air conditioner and the actual operation load of the indoor unit are comprehensively considered, and the accuracy and the rationality of the allocation and the charging of the multi-connected air conditioner are improved.
According to an embodiment of the present invention, in another aspect, a shared charging apparatus for a multi-connected air conditioner is provided, including: the detection module is used for detecting the inlet temperature and the outlet temperature of the coil pipe of each indoor unit of the multi-split air conditioner; a first determination module for determining refrigerant enthalpy at coil inlet and outlet of each indoor unit based on the inlet temperature and the outlet temperature; and the second determination module is used for determining the cold quantity ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil pipe inlet and outlet of each indoor unit and determining the apportioned electric quantity of each indoor unit according to the cold quantity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
According to an embodiment of the present invention, in another aspect, there is provided a multi-connected air conditioner, including a processor and a computer readable storage medium storing a computer program, where the computer program is read by the processor and executed by the processor, and the method according to any one of the first aspect is implemented.
According to an embodiment of the present invention, in another aspect, a computer-readable storage medium is provided, which stores a computer program, which when read and executed by a processor, implements the method according to any one of the first aspect.
The invention has the following beneficial effects: the method comprises the steps of actually detecting the temperature of the inlet and the outlet of a coil pipe of each indoor unit of the multi-connected air conditioner, determining the enthalpy value of a refrigerant at the inlet and the outlet of the coil pipe based on the temperature of the inlet and the outlet of the coil pipe, determining the cold volume ratio of each indoor unit according to the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe of the indoor unit, comprehensively considering the actual use condition of the indoor unit to calculate the cold volume ratio, improving the rationality of the calculation of the cold volume ratio of the multi-connected air conditioner, calculating the apportioned electric quantity of the indoor unit according to the cold volume ratio of the indoor unit and the total power consumption of the multi-connected air conditioner, enabling the.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a flowchart of a shared charging method for a multi-connected air conditioner according to the present invention;
FIG. 2 is a flow chart of charge sharing of a multi-connected air conditioner according to the present invention;
fig. 3 is a schematic structural diagram of a shared charging device of a multi-connected air conditioner according to the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
the embodiment provides a method for apportioning and charging a multi-split air conditioner, which may be applied to a multi-split air conditioner, as shown in fig. 1, the method mainly includes the following steps S102 to S106:
step S102: and detecting the inlet temperature and the outlet temperature of the coil pipe of each indoor unit of the multi-split air conditioner.
The temperature sensors are respectively arranged at the coil inlet and the coil outlet of each indoor unit of the multi-split air conditioner, the coil inlet temperature of each indoor unit is detected based on the temperature sensor at the coil inlet of each indoor unit, and the coil outlet temperature of each indoor unit is detected based on the temperature sensor at the coil outlet of each indoor unit.
Step S104: and determining the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe of each indoor unit based on the inlet temperature and the outlet temperature.
The enthalpy value of the refrigerant at the coil inlet of each indoor unit can be determined according to the inlet temperature of the coil of each indoor unit, the enthalpy value of the refrigerant refers to the total heat contained in the refrigerant, and the enthalpy value of the refrigerant at the coil outlet of each indoor unit can be determined according to the outlet temperature at the coil outlet of each indoor unit.
The heat quantity increased or reduced after the refrigerant passes through the coil pipe can be further determined by acquiring the enthalpy values of the refrigerant at the inlet and the outlet of the coil pipe of each indoor unit, when the enthalpy value of the refrigerant at the outlet is larger than that of the refrigerant at the inlet, the refrigerant is indicated to obtain heat quantity in the coil pipe, and when the enthalpy value of the refrigerant at the outlet is smaller than that of the refrigerant at the inlet, the refrigerant is indicated to lose heat quantity in the coil pipe.
Step S106: and determining the cold capacity ratio of each indoor unit based on the enthalpy value of the refrigerant at the inlet and outlet of the coil pipe of each indoor unit, and determining the shared electric quantity of each indoor unit according to the cold capacity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
According to the enthalpy values of the refrigerants at the coil pipe inlet and the coil pipe outlet of each indoor unit, the heat change condition of the refrigerants after passing through the coil pipe can be determined, and the cold volume ratio of each indoor unit can be determined according to the heat change condition of the refrigerants after passing through the coil pipe of each indoor unit. Under the condition that the working time of each indoor unit of the multi-connected air conditioner is the same, the apportioned electric quantity of each indoor unit can be obtained through calculation according to the cold quantity ratio of each indoor unit and the total electric consumption quantity of the multi-connected air conditioner, and the apportioned electric charge of each indoor unit can be obtained by multiplying the proportion of the apportioned electric quantity and the total electric consumption quantity of each indoor unit by the total electric charge.
According to the allocation charging method of the multi-connected air conditioner, the temperatures of the coil pipe inlet and the coil pipe outlet of each indoor unit of the multi-connected air conditioner are actually detected, the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe is determined based on the temperatures of the inlet and the outlet of the coil pipe, the cold capacity occupation ratio of each indoor unit is determined according to the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe of the indoor unit, the cold capacity occupation ratio is calculated by comprehensively considering the actual use condition of the indoor unit, the reasonability of calculation of the cold capacity occupation ratio of the multi-connected air conditioner is improved, the allocation electric quantity of the indoor unit is calculated according to the cold capacity occupation ratio of the indoor unit and the total power consumption of the multi-connected.
In order to improve the accuracy of shared charging of the multi-connected air conditioner, the embodiment provides an implementation manner for determining the enthalpy value of the refrigerant at the inlet and the outlet of the coil of each indoor unit based on the inlet temperature and the outlet temperature, and the implementation manner may be specifically executed with reference to the following steps (1) to (3):
step (1): and detecting the evaporation temperature of each indoor unit of the multi-connected air conditioner.
In one embodiment, the pressure value of the evaporator of each indoor unit of the multi-connected air conditioner is detected based on the pressure sensor, and the evaporation temperature of each indoor unit is determined based on the pressure value. The pressure sensors are arranged in the evaporators of the indoor units of the multi-connected air conditioner, and in the normal working process of the indoor units, the pressure values of the evaporators of the indoor units are respectively detected based on the detection of the pressure sensors in the evaporators of the indoor units.
In another embodiment, the evaporating temperature of each indoor unit is detected based on a temperature sensor disposed in the middle of the coil of each indoor unit. The middle part of the coil pipe in each indoor unit of the multi-connected air conditioner is provided with a temperature sensor, and when the indoor units are in a normal working state, the temperature sensors in the middle parts of the coil pipes can detect the evaporation temperature of the refrigerant in the coil pipes.
The pressure sensor is used for detecting the pressure value of the evaporator of each indoor unit, the evaporation temperature of each indoor unit is determined according to the pressure value of the evaporator, or the temperature sensor is directly used for detecting the temperature in the middle of the coil pipe to obtain the evaporation temperature of each indoor unit, so that the evaporation temperature of each indoor unit can be accurately detected, and accurate basic data are provided for further determining the enthalpy values of the refrigerants at the inlet and the outlet of the coil pipe.
Step (2): and inquiring the enthalpy value of the refrigerant at the coil pipe inlet of the indoor unit from the refrigerant state parameter table based on the inlet temperature and the evaporation temperature.
The preset refrigerant state parameter table stores enthalpy values corresponding to various refrigerants at different evaporation temperatures and at different coil pipe inlet temperatures and coil pipe outlet temperatures, wherein the only enthalpy value of the refrigerant at the coil pipe inlet can be determined according to the coil pipe inlet temperature and the evaporation temperature, and the only enthalpy value of the refrigerant at the coil pipe outlet can be determined according to the coil pipe outlet temperature and the evaporation temperature.
The method comprises the steps of obtaining the inlet temperature of a coil pipe when each indoor unit normally operates, inquiring a refrigerant state parameter table based on the type of a refrigerant in the indoor unit, and obtaining the enthalpy value of the refrigerant corresponding to the inlet temperature and the evaporation temperature of the coil pipe of each indoor unit from the refrigerant state parameter table.
And (3): and inquiring the enthalpy value of the refrigerant at the coil pipe outlet of the indoor unit from the refrigerant state parameter table based on the outlet temperature and the evaporation temperature.
And acquiring the outlet temperature of the coil pipe when each indoor unit normally operates, and inquiring a refrigerant state parameter table to obtain the enthalpy value of the refrigerant at the outlet of the coil pipe based on the outlet temperature and the evaporation temperature of the coil pipe.
The enthalpy value of the refrigerant at the inlet of the coil pipe is determined according to the temperature of the inlet of the coil pipe and the evaporation temperature, and the enthalpy value of the refrigerant at the outlet of the coil pipe is determined according to the temperature of the outlet of the coil pipe and the evaporation temperature, so that the actual load of an indoor unit in the running process of the multi-connected air conditioner is fully considered, and the apportionment charging rationality of the multi-connected air conditioner is improved.
In order to accurately calculate the cold capacity ratio of each indoor unit, this embodiment provides an implementation manner for determining the cold capacity ratio of each indoor unit based on the enthalpy value of the refrigerant at the inlet and outlet of the coil of each indoor unit, and the implementation manner can be specifically executed by referring to the following steps 1 to 2:
step 1: and calculating the difference between the enthalpy value of the refrigerant at the outlet of the coil pipe of each indoor unit and the enthalpy value of the refrigerant at the inlet of the coil pipe to obtain the enthalpy value difference corresponding to each indoor unit.
Respectively calculating the enthalpy value h of the refrigerant at the outlet of the coil pipe of each indoor unit2nWith refrigerant enthalpy h at coil inlet1nDifference Δ h ofnWherein, Δ hn＝h2n-h1n. The multi-connected air conditioner comprises m indoor units, and the value range of n is 1-m.
Step 2: and acquiring the flow proportion corresponding to each indoor unit, and determining the cold capacity ratio of each indoor unit based on the enthalpy difference value and the flow proportion corresponding to each indoor unit.
Because each indoor unit is provided with an expansion valve, the opening of each expansion valve can be adjusted, when the opening of each expansion valve is different, the flow of the refrigerant flowing into each indoor unit is different, the heat change condition of the refrigerant before and after flowing into the indoor unit can be determined by calculating the enthalpy difference value corresponding to each indoor unit, the cold volume ratio of each indoor unit is determined by acquiring the flow ratio of the refrigerant corresponding to each indoor unit and determining the cold volume ratio of each indoor unit based on the enthalpy difference value and the flow ratio of each indoor unit, and the accuracy and the reasonability of determining the cold volume ratio of each indoor unit are improved.
In a specific embodiment, when determining the flow rate proportion corresponding to each indoor unit, the opening degree and the aperture of the expansion valve corresponding to each indoor unit can be obtained; and calculating the flow proportion corresponding to each indoor unit based on the opening degree of the expansion valve and the caliber of the expansion valve. The method comprises receiving user input of expansion valve opening and diameter of expansion valve connected with each indoor unit, and receiving feedback expansion valve opening from the expansion valve connected with each indoor unit when the expansion valve is electronic expansion valve. When the opening degree of the expansion valve is larger or the diameter of the expansion valve is larger, the ratio of the total refrigerant flow rate (that is, the flow rate flowing into all the indoor units) occupied by the refrigerant flowing into each indoor unit can be determined according to the opening degree of the expansion valve and the diameter of the expansion valve corresponding to each indoor unit.
The flow proportion of the refrigerant flowing into each indoor unit is calculated according to the opening degree and the caliber of the expansion valve of each indoor unit, so that the flow distribution condition of each indoor unit can be accurately calculated when the shared electric quantity of each indoor unit is determined, and the accuracy of shared charging of the multi-connected air conditioner is improved.
Inputting the opening degree and the caliber of an expansion valve corresponding to the indoor unit into a first calculation formula to obtain the flow proportion corresponding to the indoor unit; wherein the first calculation formula is:
rnis the flow ratio of the nth indoor unit, PnOpening degree of expansion valve of the nth indoor unit, dnThe diameter of the expansion valve of the nth indoor unit, m is the number of indoor units included in the multi-connected air conditioner, diIs the aperture of the expansion valve of the ith indoor unit, PiThe opening degree of an expansion valve of the ith indoor unit is set, and the value range of i is 1-m. . And inputting the opening degree and the caliber of the expansion valve of each indoor unit of the multi-connected air conditioner into the first calculation formula, and calculating the flow ratio of each indoor unit based on the first calculation formula.
For example, when the multi-connected air conditioner includes three indoor units, the flow rate ratio of the indoor unit 1 is indoor unit 1 expansion valve opening degree/(indoor unit 1 expansion valve opening degree + indoor unit 2 expansion valve opening degree + indoor unit 3 expansion valve opening degree).
By calculating the refrigerant flow proportion corresponding to each indoor unit based on the first calculation formula, the charging allocation of the multi-connected air conditioner can be associated with the structural characteristics of the multi-connected air conditioner, the charging mode is attached to the structural characteristics of the multi-connected air conditioner, and the calculation error of the allocated power consumption is reduced.
In order to accurately calculate the cooling capacity ratio of each indoor unit, the embodiment provides a specific implementation manner for determining the cooling capacity ratio of each indoor unit based on the enthalpy difference and the flow rate ratio corresponding to each indoor unit: inputting the enthalpy difference value and the flow ratio corresponding to the indoor unit into a second calculation formula to obtain the cold capacity ratio of the indoor unit; wherein the second calculation formula is:
Rnis the cold capacity of the nth indoor unit, delta hnIs the enthalpy difference, r, corresponding to the nth indoor unitnIs the flow ratio of the nth indoor unit, m is the number of indoor units included in the multi-connected air conditioner, riIs the flow ratio of the ith indoor unit, Δ hiThe value of i is 1-m, which is the enthalpy difference value corresponding to the indoor unit of the ith unit. And inputting the enthalpy difference value and the flow ratio of each indoor unit of the multi-connected air conditioner into the second calculation formula, and calculating the cooling capacity ratio of each indoor unit based on the second calculation formula. The method provided by this embodiment can calculate the cold capacity ratio of each indoor unit in real time, and further can calculate the apportioned electric quantity of each indoor unit in real time according to the cold capacity ratio of each indoor unit, where the apportioned electric quantity is RnTotal electric quantity of the air conditioning system.
For example, when the multi-connected air conditioner includes three indoor units, the ratio of the cooling capacity of the indoor unit 1 is the difference of the enthalpy values of the indoor units 1 and the flow rate ratio of the indoor unit 1/(the difference of the enthalpy values of the indoor units 1 and the flow rate ratio of the indoor units 2 and the difference of the enthalpy values of the indoor units 2 and the flow rate ratio of the indoor units 3).
Most machines adopt the proportion of the power of the internal machine to share at present, the power of the internal machine is basically equal to the power of the motor actually, the power is basically fixed as long as the wind gear is fixed, the power is only used for sharing the electric quantity of the motor when the power is used for calculating the sharing electric quantity, and the electric quantity required by the cooling of the internal machine is inaccurate. The cold capacity ratio of each indoor unit is calculated based on the second calculation formula, the structural characteristics of the multi-connected air conditioner and the actual operation load of the indoor units are comprehensively considered, and the accuracy and the reasonability of the shared charging of the multi-connected air conditioner are improved.
In another specific embodiment, when the multi-connected air conditioner needs to be apportioned in stages, the cooling capacity ratio of each indoor unit can be calculated based on the operation time, the enthalpy difference and the flow ratio of each indoor unit:
wherein, tnOperating time, t, of the nth indoor unit in charging phase for multi-connected air conditioneriAnd the value range of i is 1-m for the operation time of the ith indoor unit in the charging stage of the multi-connected air conditioner.
If the enthalpy difference of the refrigerant at the inlet and the outlet of the coil pipe changes or the opening of the expansion valve changes in the operation process of the indoor unit of the multi-connected air conditioner, the cold capacity ratio of each stage (the enthalpy difference and the flow ratio of the indoor unit in each stage are not changed) can be calculated respectively, and therefore the electric quantity is calculated in stages.
According to the shared charging method of the multi-connected air conditioner, the enthalpy difference of the refrigerant at the inlet and the outlet of the coil of the indoor unit can be calculated by detecting the temperature of the inlet and the outlet of the coil of the indoor unit in real time, the refrigerant flow distribution relation of each indoor unit can be calculated by detecting the opening of the expansion valve of the indoor unit in real time, the ratio of the cold output of a single indoor unit in the total cold output is calculated, the running electric quantity of the outdoor unit is shared according to the ratio, the actual running load of each indoor unit is comprehensively considered, and the shared charging precision of the multi-connected air conditioner is improved.
Example two:
corresponding to the shared charging method for the multi-connected air conditioner provided in the first embodiment, an embodiment of the present invention provides an example of applying the shared charging method for the multi-connected air conditioner, referring to the flow chart of the shared charging for the multi-connected air conditioner shown in fig. 2, and the following steps S202 to S210 may be specifically referred to:
step S202: and detecting the coil inlet temperature, the coil outlet temperature, the evaporation temperature and the opening degree parameter of the expansion valve of each indoor unit of the multi-connected air-conditioning system.
Detecting the coil inlet temperature T of each indoor unit in real time or at preset time intervals1nCoil outlet temperature T2nEvaporation temperature Te and expansion valve opening degree PnAnd the like. The preset time interval can be any time between 1 to 10 s.
Step S204: and calculating the enthalpy difference of the inlet and the outlet of the coil pipe based on the evaporation temperature of each indoor unit, the inlet temperature of the coil pipe and the outlet temperature of the coil pipe.
According to the state parameter (T) of the coil pipe of the indoor unit1nTe) inquiring the refrigerant state parameter table to obtain the enthalpy value h of the refrigerant at the inlet of the coil pipe1nAccording to the state parameter (T) of the coil pipe of the indoor unit2nTe) inquiring the refrigerant state parameter table to obtain the enthalpy value h of the refrigerant at the outlet of the coil2nCalculating enthalpy difference delta h of inlet and outlet of coil pipen＝h2n-h1n。
Step S206: the flow rate ratio of each indoor unit is calculated based on the opening degree of the expansion valve of each indoor unit.
According to the opening P of the expansion valve of the indoor unitnDiameter d of expansion valvenRespectively calculating the flow ratio r of each indoor unitn：
Step S208: and calculating the ratio of the cold output of each indoor unit in the total cold output of the system according to the enthalpy difference and the flow ratio of each indoor unit.
Calculating the ratio of the cold output of each indoor unit in the total cold output of the system:
step S210: and calculating the apportioned power consumption according to the cold quantity ratio of each indoor unit.
Indoor unit n according to cold quantity proportion RnSharing the operating electric quantity, in the nth chamberShared electric quantity of machine is RnTotal amount of electricity in the system. The total electric quantity of the system can be the electric quantity consumed by the multi-connected air-conditioning system in the preset time interval, and after the operation parameters of each indoor unit are detected each time, the current apportioned electric quantity of each indoor unit is calculated based on the operation parameters of each indoor unit, so that the accumulated apportioned electric quantity of each indoor unit in the charging time period is obtained.
Example three:
corresponding to the first method for apportioning and charging a multi-connected air conditioner provided in the foregoing embodiment, an embodiment of the present invention provides an apportioning and charging device for a multi-connected air conditioner, where the device may be applied to a multi-connected air conditioner, and refer to a schematic structural diagram of an apportioning and charging device for a multi-connected air conditioner shown in fig. 3, where the device includes the following modules:
and the detection module 31 is used for detecting the inlet temperature and the outlet temperature of the coil pipe of each indoor unit of the multi-split air conditioner.
And the first determination module 32 is used for determining the enthalpy value of the refrigerant at the inlet and the outlet of the coil of each indoor unit based on the inlet temperature and the outlet temperature.
And the second determining module 33 is configured to determine the cooling capacity duty ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil inlet and outlet of each indoor unit, and determine the shared electric quantity of each indoor unit according to the cooling capacity duty ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
According to the allocation charging device of the multi-connected air conditioner, the temperatures of the coil pipe inlet and the coil pipe outlet of each indoor unit of the multi-connected air conditioner are actually detected, the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe is determined based on the temperatures of the inlet and the outlet of the coil pipe, the cold capacity occupation ratio of each indoor unit is determined according to the enthalpy value of the refrigerant at the inlet and the outlet of the coil pipe of each indoor unit, the cold capacity occupation ratio is calculated by comprehensively considering the actual use condition of the indoor units, the reasonability of calculation of the cold capacity occupation ratio of the multi-connected air conditioner is improved, the allocation electric quantity of the indoor units is calculated according to the cold capacity occupation ratio of the indoor units and the total power consumption of the multi-connected.
In an embodiment, the first determining module 32 is further configured to detect an evaporation temperature of each indoor unit of the multi-connected air conditioner; inquiring the enthalpy value of the refrigerant at the coil pipe inlet of the indoor unit from the refrigerant state parameter table based on the inlet temperature and the evaporation temperature; and inquiring the enthalpy value of the refrigerant at the coil pipe outlet of the indoor unit from the refrigerant state parameter table based on the outlet temperature and the evaporation temperature.
In an embodiment, the first determining module 32 is further configured to detect a pressure value of an evaporator of each indoor unit of the multi-connected air conditioner based on the pressure sensor, and determine an evaporation temperature of each indoor unit based on the pressure value; or the evaporating temperature of each indoor unit is detected based on a temperature sensor arranged in the middle of the coil pipe of each indoor unit.
In an embodiment, the second determining module 33 is further configured to calculate a difference between an enthalpy value of the refrigerant at an outlet of the coil of each indoor unit and an enthalpy value of the refrigerant at an inlet of the coil, so as to obtain an enthalpy difference corresponding to each indoor unit; and acquiring the flow proportion corresponding to each indoor unit, and determining the cold capacity ratio of each indoor unit based on the enthalpy difference value and the flow proportion corresponding to each indoor unit.
In one embodiment, the second determining module 33 is further configured to obtain an opening degree and an aperture of an expansion valve corresponding to each indoor unit; and calculating the flow proportion corresponding to each indoor unit based on the opening degree of the expansion valve and the caliber of the expansion valve.
In one embodiment, the second determining module 33 is further configured to input the opening degree and the aperture diameter of the expansion valve corresponding to the indoor unit into the first calculation equation to obtain the flow rate ratio corresponding to the indoor unit; wherein the first calculation formula is:
rnis the flow ratio of the nth indoor unit, PnOpening degree of expansion valve of the nth indoor unit, dnThe diameter of the expansion valve of the nth indoor unit, and m is the number of the indoor units included in the multi-connected air conditioner.
In an embodiment, the second determining module 33 is further configured to input the enthalpy difference and the flow rate ratio corresponding to the indoor unit into a second calculation formula to obtain the cooling capacity ratio of the indoor unit; wherein the second calculation formula is:
Rnis the cold capacity of the nth indoor unit, delta hnIs the enthalpy difference, r, corresponding to the nth indoor unitnThe flow ratio of the nth indoor unit is shown, and m is the number of the indoor units included in the multi-connected air conditioner.
According to the shared charging device of the multi-connected air conditioner, the enthalpy difference value of the refrigerant at the inlet and outlet of the coil of the indoor unit can be calculated by detecting the temperature of the inlet and outlet of the coil of the indoor unit in real time, the refrigerant flow distribution relation of each indoor unit can be calculated by detecting the opening of the expansion valve of the indoor unit in real time, the ratio of the cold output of a single indoor unit in the total cold output is calculated, the running electric quantity of the outdoor unit is shared according to the ratio, the actual running load of each indoor unit is comprehensively considered, and the shared charging precision of the multi-connected air conditioner is improved.
Example four:
corresponding to the shared charging method for the multi-connected air conditioner provided in the first embodiment, the present embodiment provides a multi-connected air conditioner, where the air conditioner includes a computer-readable storage medium storing a computer program and a processor, and when the computer program is read and executed by the processor, the shared charging method for the multi-connected air conditioner provided in the first embodiment is implemented.
Temperature sensors are respectively arranged at the inlet and the outlet of each indoor unit coil pipe of the multi-connected air conditioner, a pressure sensor is arranged in an evaporator of each indoor unit, or a temperature sensor is also arranged in the middle of each indoor unit coil pipe.
Example five:
the embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the split charging method for a multi-connected air conditioner, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The shared charging device of the multi-connected air conditioner and the multi-connected air conditioner disclosed by the embodiment correspond to the shared charging method of the multi-connected air conditioner disclosed by the embodiment, so that the description is relatively simple, and relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A shared charging method of a multi-connected air conditioner is characterized by comprising the following steps:
detecting the inlet temperature and the outlet temperature of a coil pipe of each indoor unit of the multi-split air conditioner;
determining a refrigerant enthalpy value at a coil inlet and outlet of each indoor unit based on the inlet temperature and the outlet temperature;
and determining the cold quantity ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil pipe inlet and outlet of each indoor unit, and determining the shared electric quantity of each indoor unit according to the cold quantity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
2. The shared charging method for a multi-connected air conditioner according to claim 1, wherein the step of determining the enthalpy of the refrigerant at the inlet and outlet of the coil of each indoor unit based on the inlet temperature and the outlet temperature comprises:
detecting the evaporation temperature of each indoor unit of the multi-connected air conditioner;
inquiring the enthalpy value of the refrigerant at the coil pipe inlet of the indoor unit from a refrigerant state parameter table based on the inlet temperature and the evaporation temperature;
and inquiring the enthalpy value of the refrigerant at the coil pipe outlet of the indoor unit from the refrigerant state parameter table based on the outlet temperature and the evaporation temperature.
3. The shared charging method for the multi-connected air conditioners as claimed in claim 2, wherein the step of detecting the evaporating temperature of each indoor unit of the multi-connected air conditioners comprises:
detecting pressure values of evaporators of all indoor units of the multi-connected air conditioner based on pressure sensors, and determining evaporation temperatures of all the indoor units based on the pressure values;
alternatively, the first and second electrodes may be,
and detecting the evaporation temperature of each indoor unit based on a temperature sensor arranged in the middle of the coil pipe of each indoor unit.
4. The shared charging method for the multi-connected air conditioners as claimed in claim 1, wherein the step of determining the cold capacity ratio of each indoor unit based on the enthalpy of the refrigerant at the coil inlet and outlet of each indoor unit comprises:
calculating the difference between the enthalpy value of the refrigerant at the outlet of the coil pipe of each indoor unit and the enthalpy value of the refrigerant at the inlet of the coil pipe to obtain the enthalpy value difference corresponding to each indoor unit;
and acquiring the flow proportion corresponding to each indoor unit, and determining the cold capacity ratio of each indoor unit based on the enthalpy difference value and the flow proportion corresponding to each indoor unit.
5. The shared charging method for the multi-connected air conditioners according to claim 4, wherein the step of obtaining the flow rate proportion corresponding to each indoor unit comprises:
acquiring the opening degree and the caliber of an expansion valve corresponding to each indoor unit;
and calculating the flow proportion corresponding to each indoor unit based on the opening of the expansion valve and the aperture of the expansion valve.
6. The shared charging method for a multi-connected air conditioner according to claim 5, wherein the step of calculating the flow rate ratio corresponding to each indoor unit based on the opening degree of the expansion valve and the aperture of the expansion valve comprises:
inputting the opening degree and the caliber of an expansion valve corresponding to the indoor unit into a first calculation formula to obtain a flow proportion corresponding to the indoor unit; wherein the first calculation formula is:
rnis the flow ratio of the nth indoor unit, PnOpening degree of expansion valve of the nth indoor unit, dnThe diameter of the expansion valve of the nth indoor unit, and m is the number of the indoor units included in the multi-connected air conditioner.
7. The shared charging method for the multi-connected air conditioners as claimed in claim 4, wherein the step of determining the ratio of the cooling capacity of each indoor unit based on the enthalpy difference and the flow rate ratio corresponding to each indoor unit comprises:
inputting the enthalpy difference value and the flow ratio corresponding to the indoor unit into a second calculation formula to obtain the cold volume ratio of the indoor unit; wherein the second calculation formula is:
Rnis the cold capacity of the nth indoor unit, delta hnIs the enthalpy difference, r, corresponding to the nth indoor unitnAnd m is the flow ratio of the nth indoor unit, and the number of the indoor units included in the multi-connected air conditioner.
8. The utility model provides a sharing charging device of multi-connected air conditioner which characterized in that includes:
the detection module is used for detecting the inlet temperature and the outlet temperature of the coil pipe of each indoor unit of the multi-split air conditioner;
a first determination module for determining refrigerant enthalpy at coil inlet and outlet of each indoor unit based on the inlet temperature and the outlet temperature;
and the second determination module is used for determining the cold quantity ratio of each indoor unit based on the enthalpy value of the refrigerant at the coil pipe inlet and outlet of each indoor unit and determining the apportioned electric quantity of each indoor unit according to the cold quantity ratio of each indoor unit and the total electric quantity consumption of the multi-connected air conditioner.
9. A multi-connected air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read by the processor and executing the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-7.
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