CN108195020B

CN108195020B - Control method and control device, storage medium and variable frequency air conditioning equipment

Info

Publication number: CN108195020B
Application number: CN201711381237.9A
Authority: CN
Inventors: 张建新
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2017-12-20
Filing date: 2017-12-20
Publication date: 2020-04-07
Anticipated expiration: 2037-12-20
Also published as: CN108195020A

Abstract

The invention provides a control method of variable frequency air conditioning equipment, which comprises the following steps: setting the maximum consumption power and the maximum working current of the operation of the variable frequency air conditioning equipment; after the variable frequency air conditioning equipment is started and operates for a preset time, acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment; and determining whether to adjust the current operating frequency of the compressor of the variable frequency air conditioning equipment according to the maximum power consumption and the current power consumption, the maximum working current and the current working current. Correspondingly, the invention also provides a control device of the variable frequency air conditioning equipment, a computer readable storage medium and the variable frequency air conditioning equipment. Through the technical scheme of the invention, the consumed power of the variable frequency air conditioning equipment can be reasonably limited not to exceed the set maximum consumed power according to the actual configuration condition of the variable frequency air conditioning equipment, and the circuit can be effectively prevented from being burnt out due to overlarge current of the equipment circuit, so that the purposes of improving the use safety and reliability of the product are achieved, and the service life of the product is prolonged.

Description

Control method and control device, storage medium and variable frequency air conditioning equipment

Technical Field

The invention relates to the technical field of variable frequency air conditioner control, in particular to a control method of variable frequency air conditioner equipment, a control device of the variable frequency air conditioner equipment, a computer readable storage medium and the variable frequency air conditioner equipment.

Background

At present, for variable frequency air conditioning equipment (or a heat pump unit), the input power of the variable frequency air conditioning equipment (or the heat pump unit) generally changes greatly along with the difference of working conditions and the frequency of a compressor, and in consideration of the limitation of partial European countries on the total power of electricity, when the power is too high, a main switch can be tripped, so that inconvenience is caused to the life of a user; in addition, for a certain installed line of the variable frequency air conditioning equipment (or the heat pump unit), when the compressor operates at high frequency, the current of an external line may exceed the maximum allowable current, so that the line is burnt out, even a fire disaster is caused, and the use safety is not effectively guaranteed.

Therefore, how to reasonably limit the input of the maximum power and the maximum current of the variable frequency air conditioning equipment (or the heat pump unit) according to the actual configuration situation of the variable frequency air conditioning equipment, so as to achieve the purpose of improving the use safety and reliability of the product, thereby prolonging the service life of the product, and becoming a technical problem to be solved urgently.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

Therefore, an object of the present invention is to provide a new method for controlling inverter air conditioners, which can reasonably limit the consumed power of the inverter air conditioners to not exceed the set maximum consumed power according to the actual configuration of the inverter air conditioners and can effectively prevent the circuit from being burned out due to excessive line current of the inverter air conditioners, thereby achieving the purpose of improving the safety and reliability of the product and prolonging the service life of the product.

The invention also aims to correspondingly provide a control device of the variable frequency air conditioner, a computer readable storage medium and the variable frequency air conditioner.

In order to achieve at least one of the above objects, according to a first aspect of the present invention, there is provided an inverter air conditioner control method, including: setting the maximum consumption power and the maximum working current of the operation of the variable frequency air conditioning equipment; after the variable frequency air conditioning equipment is started and operates for a preset time, acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment; and determining whether to adjust the current running frequency of a compressor of the variable-frequency air conditioning equipment according to the maximum power consumption and the current power consumption, the maximum working current and the current working current.

In the technical scheme, in order to effectively limit the consumed power and the working current of the inverter air-conditioning equipment and ensure the safe operation of the inverter air-conditioning equipment, the maximum consumed power and the maximum working current which can be reached during the operation of the inverter air-conditioning equipment can be set for the inverter air-conditioning equipment according to the actual configuration condition of the inverter air-conditioning equipment, the corresponding maximum consumed power and the corresponding maximum working current can be respectively set according to different installation environments (such as line configuration conditions) of the inverter air-conditioning equipment, further, the purposes of accurately limiting the consumed power and the working current of the inverter air-conditioning equipment by monitoring the actual conditions of the consumed power and the working current in the operation process of the inverter air-conditioning equipment and determining whether to adjust the current operation power of a compressor of the inverter air-conditioning equipment by combining the preset maximum consumed power and the preset maximum working current can be achieved, and thus, the purposes of reasonably limiting the consumed power of the inverter air-conditioning equipment The power consumption and the effective prevention of the overlarge current of the equipment line, thereby achieving the purposes of improving the use safety and reliability of the product and prolonging the service life of the product; in order to ensure the real-time availability and reliability of the consumed power and the working current of the obtained variable frequency air conditioning equipment, the current consumed power and the current working current of the variable frequency air conditioning equipment can be obtained after the starting operation time of the variable frequency air conditioning equipment reaches the preset time, namely the equipment is ensured to operate stably.

In the above technical solution, preferably, the step of determining whether to adjust the current operating frequency of the compressor of the inverter air conditioning device according to the maximum power consumption and the current power consumption, the maximum operating current, and the current operating current includes: when the current consumed power is greater than or equal to the maximum consumed power, controlling to reduce the current running frequency by a first preset frequency threshold; when the current consumed power is smaller than the maximum consumed power and larger than the preset consumed power, determining whether to adjust the current operating frequency according to the magnitude relation between the current working current and the maximum working current; when the current consumed power is smaller than or equal to the preset consumed power, determining whether to adjust the current operating frequency according to the magnitude relation between the current working current and the maximum working current; the preset power consumption is a difference between the maximum power consumption and a preset power threshold, and the preset power threshold is a product of the maximum power consumption and a first scaling factor.

In the technical scheme, in order to accurately determine whether the current operating frequency of the compressor of the inverter air-conditioning equipment needs to be adjusted to achieve the purpose of limiting the consumed power and the working current of the inverter air-conditioning equipment, specifically, whether the current operating frequency of the compressor needs to be adjusted or not is determined according to the size relationship between the current consumed power of the inverter air-conditioning equipment after the inverter air-conditioning equipment operates stably and the set maximum consumed power, and further, when the current consumed power of the inverter air-conditioning equipment is greater than or equal to the maximum consumed power of the inverter air-conditioning equipment, the inverter air-conditioning equipment is indicated to be in overload operation, and the current operating frequency of the compressor needs to be reduced by a first preset frequency threshold value to ensure the safe operation of the equipment; when the current consumed power is smaller than the maximum consumed power, it is indicated that the equipment does not have the risk of tripping the main switch, and further, when the current consumed power is different from the comparison result of the preset consumed power, whether the current operation frequency of the compressor is adjusted or not is determined according to the comparison result of the current working current of the variable frequency air conditioning equipment and the maximum working current of the variable frequency air conditioning equipment, that is, whether the purpose of limiting the equipment current input by adjusting the operation frequency of the compressor is timely determined according to the actual condition of whether the equipment line current is too large or not, so that the line is prevented from being burnt out due to the fact that the current of an external line of the variable frequency air conditioning equipment is too high, and the safety of electricity utilization of a.

The difference between the preset consumed power and the maximum consumed power set according to the installation environment of the inverter air-conditioning equipment is a preset power threshold value, and the preset power threshold value is further a product calculation result of the maximum consumed power and a first proportional coefficient, so that the operation frequency of the compressor is adjusted within the adaptive power range according to the working current of the equipment, and the operation frequency of the compressor is guaranteed to be reasonably and accurately adjusted to avoid influencing the normal equipment functions of the inverter air-conditioning equipment, such as a normal refrigerating function or a heating function.

In any of the above technical solutions, preferably, when the current power consumption is smaller than the maximum power consumption and larger than the preset power consumption, the step of adjusting the current operating frequency according to the magnitude relationship between the current operating current and the maximum operating current specifically includes: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; and when the current working current is less than the maximum working current, controlling the actual running frequency of the compressor to be less than or equal to the current running frequency.

In the technical scheme, when the current real-time power consumption after the inverter air-conditioning equipment operates stably meets the condition that the current real-time power consumption is lower than the set maximum power consumption, if the current real-time power consumption is larger than the preset power consumption lower than the maximum power consumption, the operating frequency of the compressor can be correspondingly adjusted within the power range according to the working current of the equipment, specifically, when the current real-time working current after the inverter air-conditioning equipment operates stably is larger than or equal to the set maximum working current, the current of an external circuit of the inverter air-conditioning equipment is over high, in order to ensure the operation safety of the inverter air-conditioning equipment, the current operating frequency of the compressor needs to be reduced by a first preset frequency threshold value so as to prevent the circuit from being burnt out and even causing fire due to the over high current of the external circuit, and when the current operating current is smaller than the maximum working current, the current operating frequency can be kept by controlling the compressor or can be properly reduced on the basis of the current operating frequency The current input of the variable frequency air conditioning equipment is limited by the operating frequency working mode, so that the operating safety and reliability of the variable frequency air conditioning equipment are ensured.

In any of the above technical solutions, preferably, when the current consumed power is less than or equal to the preset consumed power, the step of adjusting the current operating frequency according to the magnitude relationship between the current operating current and the maximum operating current specifically includes: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; when the current working current is less than the maximum working current and greater than the preset working current, controlling the actual operating frequency of the compressor to be less than or equal to the current operating frequency; when the current working current is less than or equal to the preset working current, controlling to increase the current running frequency by a second preset frequency threshold; the preset working current is the difference between the maximum working current and a preset current threshold, and the preset current threshold is the product of the maximum working current and a second proportionality coefficient, and the second preset frequency threshold is smaller than the first preset frequency threshold.

In the technical scheme, when the current real-time power consumption after the inverter air conditioning equipment operates stably is lower than the set maximum power consumption, if the current real-time power consumption is less than or equal to the preset power consumption lower than the maximum power consumption, the operating frequency of the compressor can be correspondingly adjusted within the power range according to the working current of the equipment, specifically, when the current real-time current working current after the inverter air conditioning equipment operates stably is greater than or equal to the set maximum working current, it indicates that the current of an external circuit of the inverter air conditioning equipment is too high, in order to ensure the operating safety of the inverter air conditioning equipment, and prevent the circuit from being burned out and even causing fire due to the too high current of the external circuit, the current operating frequency of the compressor needs to be reduced by a first preset frequency threshold; when the current working current is less than the maximum working current, the current operating frequency of the compressor is adjusted according to the difference of the comparison result of the current working current and the preset working current, so as to achieve the purpose of further limiting the current input of the equipment, namely when the current working current is greater than the preset working current, the limitation of the current input of the variable frequency air conditioning equipment can be realized by controlling the compressor to keep working at the current operating frequency or at an operating frequency which is properly reduced on the basis of the current operating frequency, so that the operating safety and reliability of the variable frequency air conditioning equipment are ensured, when the current working current is less than or equal to the preset working current, in order to ensure the working efficiency of the variable frequency air conditioning equipment, the current operating frequency of the compressor needs to be increased by a second preset frequency threshold, and meanwhile, in order to prevent the overload operation after the working frequency is increased, the set second preset frequency threshold should take a value smaller than the first preset frequency threshold.

The difference between the preset working current and the maximum working current set according to the installation environment of the inverter air-conditioning equipment is a preset current threshold value, and the preset current threshold value is further a product calculation result of the maximum working current and a second proportionality coefficient, so that the operation frequency of the compressor is adjusted according to the working current of the equipment, the operation frequency of the compressor is guaranteed to be reasonably and accurately adjusted, and normal equipment functions of the inverter air-conditioning equipment are prevented from being influenced, such as a normal refrigerating function or a heating function.

In any of the above technical solutions, preferably, the step of obtaining the current power consumption and the current working current of the inverter air-conditioning equipment after the inverter air-conditioning equipment is turned on and operated for a preset time specifically includes: after the variable frequency air conditioner is started and operates for a preset time, detecting the working current and the working voltage of a compressor of the variable frequency air conditioner equipment at intervals of the preset time to obtain n working currents and n working voltages, wherein n is an integer greater than or equal to 1; determining fan consumption power and fan working current according to the current wind gear of a fan of the variable frequency air conditioning equipment at preset time intervals so as to obtain n fan consumption powers and n fan working currents; acquiring the element consumption power and the element working current of other elements except a compressor and a fan of the variable frequency air conditioning equipment at preset time intervals to obtain n element consumption powers and n element working currents; acquiring a power factor and a frequency conversion efficiency of the frequency conversion air conditioning equipment; calculating the current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor and the frequency conversion efficiency; and calculating the current working current according to the n working currents, the n fan working currents and the n element working currents.

In this technical scheme, after the inverter air conditioning equipment is stable in the preset operation time, in order to ensure the accuracy and stability of the current power consumption and the current working current of the inverter air conditioning equipment, a mode of acquiring the relevant working parameters of the inverter air conditioning equipment once at preset time intervals and repeating the operation for n times may be adopted to acquire the working parameters of the inverter air conditioning equipment, where other relevant working parameters at least include: working current and working voltage of the compressor, fan power consumption and fan working current, element power consumption and element working current of other elements, and power factor and frequency conversion efficiency of the variable frequency air conditioning equipment are determined, current power consumption of the variable frequency air conditioning equipment is calculated according to the power factor and the frequency conversion efficiency, n working currents and n working voltages of the compressor, n fan power consumption and n element power consumption, and current working current of the variable frequency air conditioning equipment is calculated according to the n working currents, n fan working currents and n element working currents of the compressor, so that favorable guarantee is provided for adjustment of working frequency of the compressor.

In any of the above solutions, preferably, currently

Wherein, I_iRepresentative of the operating current, I_{f_i}Representing the operating current of the fan, I_{o_i}Representing the element operating current; and when the heat pump unit of the variable frequency air conditioning equipment is a single-phase unit, the heat pump unit is currently used

Wherein, U_iRepresents the operating voltage, I_iRepresenting operating current,. epsilon.representing power factor, ξ representing frequency conversion efficiency, P_{f_i}Representing power consumption of the fan, P_{o_i}Representing the power consumed by the element; when the heat pump unit of the variable frequency air conditioning equipment is a three-phase unit, the heat pump unit is currently

Wherein, U_iRepresents the operating voltage, I_iRepresenting operating current,. epsilon.representing power factor, ξ representing frequency conversion efficiency, P_{f_i}Representing power consumption of the fan, P_{o_i}Representing the power consumed by the element.

In the technical scheme, in order to ensure accuracy and stability of the obtained current consumed power and current working current of the inverter air-conditioning equipment, average consumed power and average working current of the inverter air-conditioning equipment within a period of time can be used as the current consumed power and the current working current of the inverter air-conditioning equipment, that is, average consumed power within n preset time intervals is used as the current consumed power of the inverter air-conditioning equipment, and average working current within n preset time intervals is used as the current working current of the inverter air-conditioning equipment; different power calculation formulas can be matched and used for different types of heat pump units so as to further ensure the accuracy of power consumption detection.

According to a second aspect of the present invention, there is provided a control apparatus of an inverter air conditioner, comprising: the setting module is used for setting the maximum consumed power and the maximum working current of the operation of the variable frequency air conditioning equipment; the acquisition module is used for acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment after the variable frequency air conditioning equipment is started and operates for a preset time; and the processing module is used for determining whether to adjust the current running frequency of the compressor of the variable frequency air conditioning equipment according to the maximum power consumption, the current power consumption, the maximum working current and the current working current.

In the foregoing technical solution, preferably, the processing module specifically includes: the control submodule is used for controlling the current operation frequency to be reduced by a first preset frequency threshold when the current consumption power is larger than or equal to the maximum consumption power; the first processing submodule is used for adjusting the current operating frequency according to the magnitude relation between the current working current and the maximum working current when the current consumed power is smaller than the maximum consumed power and larger than the preset consumed power; the second processing submodule is used for determining whether to adjust the current operating frequency according to the magnitude relation between the current working current and the maximum working current when the current consumed power is less than or equal to the preset consumed power; the preset power consumption is a difference between the maximum power consumption and a preset power threshold, and the preset power threshold is a product of the maximum power consumption and a first scaling factor.

In any of the above technical solutions, preferably, the first processing sub-module is specifically configured to: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; and when the current working current is less than the maximum working current, controlling the actual running frequency of the compressor to be less than or equal to the current running frequency.

In any of the above technical solutions, preferably, the second processing sub-module is specifically configured to: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; when the current working current is less than the maximum working current and greater than the preset working current, controlling the actual operating frequency of the compressor to be less than or equal to the current operating frequency; when the current working current is less than or equal to the preset working current, controlling to increase the current running frequency by a second preset frequency threshold; the preset working current is the difference between the maximum working current and a preset current threshold, and the preset current threshold is the product of the maximum working current and a second proportionality coefficient, and the second preset frequency threshold is smaller than the first preset frequency threshold.

In any one of the above technical solutions, preferably, the obtaining module includes: the detection submodule is used for detecting the working current and the working voltage of a compressor of the variable frequency air conditioner equipment at intervals of preset time after the variable frequency air conditioner is started to operate for the preset time so as to obtain n working currents and n working voltages, wherein n is an integer greater than or equal to 1; the determining submodule is used for determining fan consumed power and fan working current according to the current wind gear of a fan of the variable-frequency air conditioning equipment at intervals of preset time so as to obtain n fan consumed powers and n fan working currents; the first obtaining submodule is used for obtaining the element consumption power and the element working current of other elements except the compressor and the fan of the variable frequency air conditioning equipment at preset time intervals so as to obtain n element consumption powers and n element working currents; the second acquisition submodule is used for acquiring the power factor and the frequency conversion efficiency of the frequency conversion air conditioning equipment; the first calculation submodule is used for calculating the current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor and the frequency conversion efficiency; and the second calculation submodule is used for calculating the current working current according to the n working currents, the n fan working currents and the n element working currents.

In any of the above solutions, preferably, currently

According to a third aspect of the present invention, there is provided a control apparatus of an inverter air conditioner, comprising: a processor; and a memory for storing executable instructions of the processor, wherein the processor is used for implementing the steps of the control method of the inverter air conditioner according to any one of the above-mentioned technical solutions of the first aspect when executing the executable instructions stored in the memory.

According to a fourth aspect of the present invention, there is provided a computer readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the control method of an inverter air conditioning equipment as set forth in any one of the above-mentioned aspects of the first aspect.

According to a fifth aspect of the present invention, there is provided an inverter air conditioning apparatus comprising: the control device for an inverter air conditioner according to any one of the second and third aspects.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart illustrating a control method of an inverter air conditioner according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a method for obtaining the current consumed power and the current working current of the inverter air conditioner;

fig. 3 shows a schematic block diagram of a control apparatus of an inverter air conditioner according to a first embodiment of the present invention;

FIG. 4 shows a schematic block diagram of the processing module shown in FIG. 3;

FIG. 5 shows a schematic block diagram of the acquisition module shown in FIG. 3;

FIG. 6 is a schematic block diagram of a control device of an inverter air conditioner according to a second embodiment of the present invention

FIG. 7 shows a block diagram of a control system of an inverter air conditioner according to an embodiment of the present invention;

fig. 8 shows a work flow diagram of a control system of an inverter air conditioner according to an embodiment of the invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The following describes a scheme of a control method of an inverter air conditioner according to an embodiment of the present invention with reference to fig. 1 and 2.

As shown in fig. 1, the method for controlling an inverter air conditioner according to an embodiment of the present invention specifically includes the following steps:

and 102, setting the maximum consumed power and the maximum working current of the operation of the variable frequency air conditioning equipment.

And step 104, acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment after the variable frequency air conditioning equipment is started and operates for a preset time.

And 106, determining whether to adjust the current running frequency of the compressor of the variable frequency air conditioning equipment or not according to the maximum power consumption, the current power consumption, the maximum working current and the current working current.

In this embodiment, in order to effectively limit the power consumption and the working current of the inverter air-conditioning equipment and ensure the safe operation of the inverter air-conditioning equipment, the maximum power consumption and the maximum working current which can be achieved during the operation of the inverter air-conditioning equipment can be set for the inverter air-conditioning equipment according to the actual configuration condition thereof, and specifically, the corresponding maximum power consumption and the maximum working current can be respectively set according to the difference of the installation environment (such as the line configuration condition) of the inverter air-conditioning equipment, and further, the purpose of accurately limiting the power consumption and the working current of the inverter air-conditioning equipment can be achieved by monitoring the actual conditions of the power consumption and the working current during the operation of the inverter air-conditioning equipment and determining whether to adjust the current operation power of the compressor of the inverter air-conditioning equipment by combining the preset maximum power consumption and the preset maximum working current, so that the power consumption of the inverter air-conditioning equipment is reasonably limited by combining The power and the current of the equipment line are effectively prevented from being overlarge, so that the purposes of improving the use safety and reliability of the product are achieved, and the service life of the product is prolonged; in order to ensure the real-time availability and reliability of the consumed power and the working current of the obtained variable frequency air conditioning equipment, the current consumed power and the current working current of the variable frequency air conditioning equipment can be obtained after the starting operation time of the variable frequency air conditioning equipment reaches the preset time, namely the equipment is ensured to operate stably.

Further, step 106 in the above embodiment may be specifically executed as the following process steps:

when the current consumed power is greater than or equal to the maximum consumed power, controlling to reduce the current running frequency by a first preset frequency threshold; when the current consumed power is smaller than the maximum consumed power and larger than the preset consumed power, determining whether to adjust the current operating frequency according to the magnitude relation between the current working current and the maximum working current; and when the current consumed power is less than or equal to the preset consumed power, determining whether to adjust the current operating frequency according to the magnitude relation between the current operating current and the maximum operating current.

In this embodiment, in order to accurately determine whether to adjust the current operating frequency of the compressor of the inverter air-conditioning device to achieve the purpose of limiting the consumed power and the operating current of the inverter air-conditioning device, specifically, first, whether to adjust the current operating frequency of the compressor may be determined according to a magnitude relationship between the current consumed power of the inverter air-conditioning device after the inverter air-conditioning device operates stably and a set maximum consumed power, and further, when the current consumed power of the inverter air-conditioning device is greater than or equal to the maximum consumed power, it is indicated that the inverter air-conditioning device is operating in an overload state, and the current operating frequency of the compressor needs to be reduced by a first preset frequency threshold value to ensure safe operation of the device to avoid tripping of a main switch; when the current consumed power is smaller than the maximum consumed power, it is indicated that the equipment does not have the risk of tripping the main switch, and further, when the current consumed power is different from the comparison result of the preset consumed power, whether the current operation frequency of the compressor is adjusted or not is determined according to the comparison result of the current working current of the variable frequency air conditioning equipment and the maximum working current of the variable frequency air conditioning equipment, that is, whether the purpose of limiting the equipment current input by adjusting the operation frequency of the compressor is timely determined according to the actual condition of whether the equipment line current is too large or not, so that the line is prevented from being burnt out due to the fact that the current of an external line of the variable frequency air conditioning equipment is too high, and the safety of electricity utilization of a.

The preset power consumption is a difference between the maximum power consumption and a preset power threshold, and the preset power threshold is a product of the maximum power consumption and a first scaling factor.

It can be understood that the difference between the preset consumed power and the maximum consumed power set according to the installation environment of the inverter air-conditioning equipment is a preset power threshold, and the preset power threshold is further a product calculation result of the maximum consumed power and the first proportional coefficient, so as to adjust the operating frequency of the compressor according to the working current of the equipment within the adaptive power range, and ensure that the operating frequency of the compressor is reasonably and accurately adjusted to avoid affecting the normal equipment functions of the inverter air-conditioning equipment, such as the normal refrigeration function or the heating function.

Specifically, the value range of the first preset frequency threshold may be preferably 1Hz to 10Hz, and the value range of the first scale factor may be preferably 1% to 10%.

Further, in the above embodiment, when the current consumption power is smaller than the maximum consumption power and larger than the preset consumption power, the step of adjusting the current operating frequency according to the magnitude relationship between the current operating current and the maximum operating current specifically includes: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; and when the current working current is less than the maximum working current, controlling the actual running frequency of the compressor to be less than or equal to the current running frequency.

In this embodiment, when the current real-time power consumption after the inverter air-conditioning equipment is stably operated is lower than the set maximum power consumption, if the current real-time power consumption is greater than the preset power consumption lower than the maximum power consumption, the operating frequency of the compressor may be correspondingly adjusted within the power range according to the magnitude of the operating current of the equipment, specifically, when the current real-time current operating current after the inverter air-conditioning equipment is stably operated is greater than or equal to the set maximum operating current, it indicates that the current of the external circuit of the inverter air-conditioning equipment is too high, in order to ensure the operation safety of the inverter air-conditioning equipment, and to prevent the circuit from being burned out and even causing fire due to the too high current of the external circuit, the current operating frequency of the compressor needs to be reduced by a first preset frequency threshold, and when the current operating current is less than the maximum operating current, the compressor may be controlled to maintain the current operating frequency or to be reduced appropriately on the basis of the current operating frequency The line frequency working mode realizes the limitation of current input of the variable frequency air conditioning equipment, thereby ensuring the operation safety and reliability of the variable frequency air conditioning equipment.

Further, in the above embodiment, the step of adjusting the current operating frequency according to the magnitude relationship between the current operating current and the maximum operating current when the current consumed power is less than or equal to the preset consumed power specifically includes: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; when the current working current is less than the maximum working current and greater than the preset working current, controlling the actual operating frequency of the compressor to be less than or equal to the current operating frequency; and when the current working current is less than or equal to the preset working current, controlling to increase the current running frequency by a second preset frequency threshold.

In this embodiment, when the current real-time power consumption after the inverter air conditioning device is operated stably is lower than the set maximum power consumption, if the current real-time power consumption is less than or equal to the preset power consumption lower than the maximum power consumption, the operating frequency of the compressor may be adjusted within the power range according to the magnitude of the operating current of the device, specifically, when the current real-time power consumption after the inverter air conditioning device is operated stably is greater than or equal to the set maximum operating current, it indicates that the current of the external circuit of the inverter air conditioning device is too high, in order to ensure the operating safety of the inverter air conditioning device, and to prevent the circuit from being burned out or even causing a fire due to the too high current of the external circuit, the current operating frequency of the compressor needs to be decreased by a first preset frequency threshold; when the current working current is less than the maximum working current, the current operating frequency of the compressor is adjusted according to the difference of the comparison result of the current working current and the preset working current, so as to achieve the purpose of further limiting the current input of the equipment, namely when the current working current is greater than the preset working current, the limitation of the current input of the variable frequency air conditioning equipment can be realized by controlling the compressor to keep working at the current operating frequency or at an operating frequency which is properly reduced on the basis of the current operating frequency, so that the operating safety and reliability of the variable frequency air conditioning equipment are ensured, when the current working current is less than or equal to the preset working current, in order to ensure the working efficiency of the variable frequency air conditioning equipment, the current operating frequency of the compressor needs to be increased by a second preset frequency threshold, and meanwhile, in order to prevent the overload operation after the working frequency is increased, the set second preset frequency threshold should take a value smaller than the first preset frequency threshold.

The preset working current is the difference between the maximum working current and a preset current threshold, and the preset current threshold is the product of the maximum working current and a second proportionality coefficient, and the second preset frequency threshold is smaller than the first preset frequency threshold.

It can be understood that the difference between the preset working current and the maximum working current set according to the installation environment of the inverter air-conditioning equipment is a preset current threshold, and the preset current threshold is further a product calculation result of the maximum working current and the second proportionality coefficient, so as to adjust the operating frequency of the compressor according to the working current of the equipment, and ensure that the operating frequency of the compressor is reasonably and accurately adjusted to avoid affecting the normal equipment functions of the inverter air-conditioning equipment, such as the normal refrigeration function or the heating function.

Specifically, the value range of the second preset frequency threshold may be preferably 1Hz to 10Hz, and the value range of the second proportionality coefficient may be preferably 1% to 10%.

Further, step 104 in the foregoing embodiment may specifically execute the flow steps shown in fig. 2, and specifically includes:

step S202, after the inverter air conditioner is started and operates for a preset time, detecting the working current and the working voltage of a compressor of the inverter air conditioner at intervals of the preset time to obtain n working currents and n working voltages, wherein n is an integer greater than or equal to 1.

The value range of the preset time may be preferably 10 seconds to 120 seconds, the value range of the preset time interval may be preferably 1 second to 10 seconds, and n is an integer greater than 1, for example, 10 times to 100 times.

And S204, determining the fan consumption power and the fan working current according to the current wind gear of the fan of the variable-frequency air conditioning equipment at preset time intervals so as to obtain n fan consumption powers and n fan working currents.

And S206, acquiring the element consumption power and the element working current of other elements except the compressor and the fan of the inverter air conditioner at preset time intervals to obtain n element consumption powers and n element working currents.

And S208, acquiring the power factor and the frequency conversion efficiency of the frequency conversion air conditioning equipment.

And step S210, calculating the current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor and the frequency conversion efficiency.

And step S212, calculating the current working current according to the n working currents, the n fan working currents and the n element working currents.

In this embodiment, after the inverter air conditioning equipment is stable during the preset operation time, in order to ensure the accuracy and stability of the obtained current power consumption and current working current of the inverter air conditioning equipment, the working parameters of the inverter air conditioning equipment may be collected in a manner of obtaining the relevant working parameters of the inverter air conditioning equipment once at preset time intervals and repeating the operation n times, where the other relevant working parameters at least include: working current and working voltage of the compressor, fan power consumption and fan working current, element power consumption and element working current of other elements, and power factor and frequency conversion efficiency of the variable frequency air conditioning equipment are determined, current power consumption of the variable frequency air conditioning equipment is calculated according to the power factor and the frequency conversion efficiency, n working currents and n working voltages of the compressor, n fan power consumption and n element power consumption, and current working current of the variable frequency air conditioning equipment is calculated according to the n working currents, n fan working currents and n element working currents of the compressor, so that favorable guarantee is provided for adjustment of working frequency of the compressor.

The power factor and the frequency conversion efficiency of the inverter air conditioner may be specifically obtained through experiments, and the component power consumption and the component operating current of other components of the inverter air conditioner, other than the compressor and the fan, may also be specifically obtained through experiments, and the other components include a PCB (Printed Circuit Board), a coil, and the like in the inverter air conditioner.

Further, in the above-described embodiments, the

Wherein, U_iRepresents the operating voltage, I_iRepresenting operating current,. epsilon.representing power factor, ξ representing frequency conversion efficiency, P_{f_i}Representing power consumption of the fan, P_{o_i}Representing the power consumed by the element; when the heat pump unit of the variable frequency air conditioning equipment is a three-phase unit, the current consumed power

In this embodiment, in order to ensure accuracy and stability of the obtained current consumed power and current operating current of the inverter air-conditioning device, average consumed power and average operating current of the inverter air-conditioning device over a period of time may be used as its current consumed power and current operating current, that is, average consumed power over n preset time intervals is used as the current consumed power of the inverter air-conditioning device and average operating current over n preset time intervals is used as the current operating current of the inverter air-conditioning device; different power calculation formulas can be matched and used for different types of heat pump units so as to further ensure the accuracy of power consumption detection.

The following describes in detail a scheme of a control device of an inverter air conditioner according to a first embodiment of the present invention with reference to fig. 3 to 5.

As shown in fig. 3, a control device 30 of an inverter air conditioner according to a first embodiment of the present invention includes: a setup module 302, an acquisition module 304, and a processing module 306.

The setting module 302 is configured to set a maximum consumed power and a maximum operating current for the operation of the inverter air conditioning equipment; the obtaining module 304 is configured to obtain a current consumed power and a current working current of the variable frequency air conditioning equipment after the variable frequency air conditioning equipment is started and operates for a preset time; the processing module 306 is configured to determine whether to adjust a current operating frequency of a compressor of the inverter air conditioner according to the maximum power consumption and the current power consumption, the maximum operating current, and the current operating current.

Further, in the foregoing embodiment, the processing module 306 specifically includes: a control submodule 3062, a first processing submodule 3064 and a second processing submodule 3066, as shown in figure 4.

The control submodule 3062 is configured to, when the current consumed power is greater than or equal to the maximum consumed power, control to decrease the current operating frequency by a first preset frequency threshold; the first processing submodule 3064 is configured to adjust the current operating frequency according to a magnitude relationship between the current operating current and the maximum operating current when the current consumed power is smaller than the maximum consumed power and larger than a preset consumed power; the second processing submodule 3066 is configured to determine whether to adjust the current operating frequency according to a magnitude relationship between the current operating current and the maximum operating current when the current consumed power is less than or equal to the preset consumed power; the preset power consumption is a difference between the maximum power consumption and a preset power threshold, and the preset power threshold is a product of the maximum power consumption and a first scaling factor.

Further, in the above embodiment, the first processing submodule 3064 is specifically configured to: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; and when the current working current is less than the maximum working current, controlling the actual running frequency of the compressor to be less than or equal to the current running frequency.

Further, in the above embodiment, the second processing submodule 3066 is specifically configured to: when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by a first preset frequency threshold; when the current working current is less than the maximum working current and greater than the preset working current, controlling the actual operating frequency of the compressor to be less than or equal to the current operating frequency; when the current working current is less than or equal to the preset working current, controlling to increase the current running frequency by a second preset frequency threshold; the preset working current is the difference between the maximum working current and a preset current threshold, and the preset current threshold is the product of the maximum working current and a second proportionality coefficient, and the second preset frequency threshold is smaller than the first preset frequency threshold.

The value range of the second preset frequency threshold may be preferably 1Hz to 10Hz, and the value range of the second proportionality coefficient may be preferably 1% to 10%.

Further, in the above embodiment, the obtaining module 304 includes: detection submodule 3041, determination submodule 3042, first acquisition submodule 3043, second acquisition submodule 3044, and first calculation submodule 3045 and second calculation submodule 3046, as shown in fig. 5.

The detecting submodule 3041 is configured to detect the working current and the working voltage of the compressor of the inverter air conditioner at preset time intervals after the inverter air conditioner is started up and operates for a preset time, so as to obtain n working currents and n working voltages, where n is an integer greater than or equal to 1; the determining submodule 3042 is configured to determine, at preset time intervals, fan consumed power and fan working current according to a current wind level of a fan of the variable frequency air conditioning device, so as to obtain n fan consumed powers and n fan working currents; the first obtaining submodule 3043 is configured to obtain, at preset time intervals, the component consumption powers and the component operating currents of other components of the inverter air conditioning device, except for the compressor and the fan, so as to obtain n component consumption powers and n component operating currents; the second obtaining submodule 3044 is configured to obtain a power factor and a frequency conversion efficiency of the inverter air conditioner; the first calculating submodule 3045 is configured to calculate a current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor, and the frequency conversion efficiency; the second calculating submodule 3046 is configured to calculate the current working current according to the n working currents, the n fan working currents, and the n element working currents.

The power factor and the frequency conversion efficiency of the variable frequency air conditioning equipment can be specifically obtained through experiments, the element consumed power and the element working current of other elements of the variable frequency air conditioning equipment except the compressor and the fan can also be specifically obtained through experiments, and the other elements comprise a PCB (printed circuit board), a coil and the like in the variable frequency air conditioning equipment.

Further, in the above-described embodiments, the

Fig. 6 shows a schematic block diagram of a control apparatus of an inverter air conditioner according to a second embodiment of the present invention.

As shown in fig. 6, the control device 60 for inverter air conditioner according to the second embodiment of the present invention includes a processor 602 and a memory 604, wherein the memory 604 stores a computer program operable on the processor 602, wherein the memory 604 and the processor 602 may be connected via a bus, and the processor 602 is configured to implement the steps of the control method for inverter air conditioner according to the above embodiment when executing the computer program stored in the memory 604.

The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.

The units in the control device of the variable frequency air conditioning equipment provided by the embodiment of the invention can be combined, divided and deleted according to actual needs.

According to an embodiment of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored, which when executed by a processor implements the steps of the control method of an inverter air conditioning device as in the above embodiments.

Further, it will be understood that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

As an embodiment of the present invention, an inverter air conditioner is further provided, which includes the control device of the inverter air conditioner in any of the above embodiments.

Fig. 7 shows a block diagram of a control system of an inverter air conditioner according to an embodiment of the present invention.

As shown in fig. 7, the control system of the inverter air conditioner according to the embodiment of the present invention includes a four-way valve 702, a first heat exchanger 704, a compressor 706, a second heat exchanger 708, a fan 710 and a throttling device 712, wherein a c port of the four-way valve 702 is connected to the first heat exchanger 704, a d port of the four-way valve 702 is connected to the first port of the compressor 706, an e port of the four-way valve 702 is connected to the second heat exchanger 708, an s port of the four-way valve 702 is connected to the second port of the compressor 706, and the fan 710 is disposed opposite to the first heat exchanger 704, and the throttling device 712 is connected between the first heat exchanger 704 and the second heat exchanger 708; further, the control system also includes a line controller 714, a controller 716, and a current/voltage detection device 718.

Specifically, for the control system, the maximum consumed power P which the unit can operate can be determined according to different installation environments (such as line configuration conditions and the like) of the variable frequency air conditioning equipment_maxAnd the maximum operating current I_maxGo forward toThe maximum power consumption and the maximum working current of the inverter air conditioner are set by the wire controller 714 of the control system, and detects the operating voltage and the operating current of the compressor 706 through the current/voltage detecting means 718, determining the fan consumed power and the fan working current according to the current wind gear of the fan 710, and obtaining the power factor and the frequency converter efficiency of the variable frequency air conditioner and the element consumed power and the element working current of other elements of the variable frequency air conditioner through experiments, the current power consumption and the current working current of the inverter air conditioner are calculated, and whether the up-conversion or the down-conversion of the compressor 706 is required to be controlled by the controller 716 is further determined according to the comparison relationship between the current power consumption of the inverter air conditioner and the set maximum power consumption and the comparison relationship between the current working current and the maximum working current.

The specific working flow of the control system of the variable frequency air conditioning equipment is shown in fig. 8, and comprises the following steps:

and S802, starting the variable frequency air conditioner.

Step S804, determining whether the running Time t after the device is powered on is greater than a preset Time _1, if so, executing step S806, otherwise, continuing the determination.

The value range of the preset Time _1 may preferably be 10 seconds to 120 seconds.

And step S806, calculating the current consumed power P and the current working current I of the inverter air conditioner.

Specifically, the power factor epsilon and the frequency conversion efficiency ξ of the frequency conversion air conditioning equipment are obtained through experiments, and the working voltage U of the compressor is detected once every preset Time interval Time _2_iAnd an operating current I_iCurrent power consumption P of the fan under the windshield_{f_i}And current I_{f_i}And other components (such as circuit board, coil, etc.) consume power P_oAnd element operating current I_oFurther, when the detection times reach n, the average power consumption of the primary system is calculated, and for the single-phase unit, the calculation formula of the average power consumption is as follows

For a three-phase unit, the average consumed power is calculated according to the formula

And the calculation formula of the average working current of the whole machine is

The preset Time interval Time _2n preferably ranges from 1 second to 10 seconds, and n is an integer greater than 1, for example, 10 times to 100 times.

Step S808, determining whether the current power consumption P is greater than or equal to the maximum power consumption P_maxIf yes, go to step S810, otherwise go to step S812.

Step S810, controlling the compressor to reduce the running frequency, wherein the maximum running frequency of the compressor is f_max＝f₀-△f₁Wherein f is₀△ f, the current operating frequency of the compressor₁(i.e., the first predetermined frequency threshold) may take a value within a range of 1Hz to 10 Hz.

Step S812, determining whether the current power consumption P is greater than P_max△ P (i.e. predetermined power consumption), if it is step S814, otherwise step S818 is performed, wherein △ P is η₁×P_max，η₁The first scale factor (i.e., the first scale factor) may be a value within a range of 1% to 10%.

Step S814, determining whether the current working current I is greater than or equal to the maximum working current I_maxIf not, step S816 is executed, otherwise, step S820 is executed.

Step S816, controlling the running frequency of the compressor to only decrease and not to increase, wherein the maximum running frequency of the compressor is f_max＝f₀。

Step S818, determining whether the current working current I is greater than or equal to the maximum working current I_maxIf yes, go to step S820, otherwise go to step S822.

Step S820, controlling the compressor to reduce the operation frequency, wherein the maximum operation frequency of the compressor is f_max＝f₀-△f₁。

Step S822, judging whether the current working current I is larger than the preset working current I_max△ I, if yes, executing step S824, otherwise, executing step S826, wherein △ I is η₂×I_max，η₂(i.e., the second proportionality coefficient) may take a value within a range of 1% to 10%.

Step S824, controlling the operation frequency of the compressor to only decrease and not to increase, wherein the maximum operable frequency of the compressor is f_max＝f₀。

Step S826, controlling the compressor to increase the running frequency, wherein the maximum running frequency of the compressor is f_max＝f₀+△f₂。

Specifically, △ f₂(i.e., the second predetermined frequency threshold) may be a value within a range of 1Hz to 10Hz, and △ f₂＜△f₁。

To sum up, the embodiment of the present invention provides a control scheme for safely and reliably limiting the maximum power consumption and the maximum current input of an inverter air conditioner, which calculates the current power consumption and the current operating current of the device by detecting the operating voltage and the operating current of a compressor, controls the compressor to perform down-conversion when the current power consumption of the device exceeds the set maximum power consumption, controls the compressor to perform down-conversion when the current power consumption of the device is lower than and close to the maximum power consumption and the current operating current exceeds the set maximum operating current, stops up-conversion when the current power consumption of the device is lower than and close to the maximum power consumption and the current operating current does not exceed the set maximum operating current, controls the compressor to perform down-conversion when the current power consumption of the device is far lower than the maximum power consumption but the current operating current exceeds the set maximum operating current, the frequency up is stopped when the current power consumption of the device is much less than the maximum power consumption but the current operating current is lower than and close to the maximum operating current, and the frequency up may be performed when the current power consumption of the device is much less than the maximum power consumption and the current operating current is much less than the maximum operating current. Therefore, the consumed power of the variable frequency air conditioning equipment does not exceed the set maximum consumed power, the phenomenon of switch tripping caused by overlarge power is prevented, meanwhile, the overlarge line current is effectively prevented, and the electricity utilization safety of a user is improved.

The technical scheme of the invention is explained in detail by combining the attached drawings, can reasonably limit the consumed power of the variable frequency air conditioning equipment not to exceed the set maximum consumed power according to the actual configuration condition of the variable frequency air conditioning equipment, and can effectively prevent the circuit from being burnt out due to overlarge circuit current of the equipment, thereby achieving the purposes of improving the use safety and reliability of the product and prolonging the service life of the product.

In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and specific meanings of the above terms in the embodiments of the present invention may be understood according to specific situations by those of ordinary skill in the art.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method of variable frequency air conditioning equipment is characterized by comprising the following steps:

setting the maximum consumption power and the maximum working current of the operation of the variable frequency air conditioning equipment;

after the variable frequency air conditioning equipment is started and operates for a preset time, acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment;

and determining whether to adjust the current running frequency of a compressor of the variable-frequency air conditioning equipment according to the maximum power consumption and the current power consumption, the maximum working current and the current working current.

2. The control method according to claim 1, wherein the step of determining whether to adjust the current operating frequency of the compressor of the inverter air conditioning device according to the maximum power consumption and the current power consumption, the maximum operating current and the current operating current specifically comprises:

when the current consumed power is larger than or equal to the maximum consumed power, controlling to reduce the current running frequency by a first preset frequency threshold;

when the current consumed power is smaller than the maximum consumed power and larger than a preset consumed power, determining whether to adjust the current operation frequency according to the magnitude relation between the current working current and the maximum working current;

when the current consumed power is smaller than or equal to the preset consumed power, determining whether to adjust the current operating frequency according to the magnitude relation between the current operating current and the maximum operating current;

the preset power consumption is a difference between the maximum power consumption and a preset power threshold, and the preset power threshold is a product of the maximum power consumption and a first proportional coefficient.

3. The control method according to claim 2, wherein the step of adjusting the current operating frequency according to a magnitude relationship between the current operating current and the maximum operating current when the current consumed power is smaller than the maximum consumed power and larger than a preset consumed power specifically comprises:

when the current working current is greater than or equal to the maximum working current, controlling to reduce the current running frequency by the first preset frequency threshold;

and when the current working current is less than the maximum working current, controlling the actual running frequency of the compressor to be less than or equal to the current running frequency.

4. The control method according to claim 2, wherein the step of adjusting the current operating frequency according to the magnitude relationship between the current operating current and the maximum operating current when the current consumed power is less than or equal to the preset consumed power specifically comprises:

when the current working current is smaller than the maximum working current and larger than a preset working current, controlling the actual running frequency of the compressor to be smaller than or equal to the current running frequency;

when the current working current is less than or equal to the preset working current, controlling to increase the current running frequency by a second preset frequency threshold;

the preset working current is the difference between the maximum working current and a preset current threshold, the preset current threshold is the product of the maximum working current and a second proportionality coefficient, and the second preset frequency threshold is smaller than the first preset frequency threshold.

5. The control method according to any one of claims 1 to 4, wherein the step of obtaining the current consumed power and the current operating current of the inverter air-conditioning equipment after the inverter air-conditioning equipment is started up and operated for a preset time specifically comprises:

after the variable frequency air conditioner is started to operate for the preset time, detecting working current and working voltage of a compressor of the variable frequency air conditioner equipment at intervals of the preset time to obtain n working currents and n working voltages, wherein n is an integer greater than or equal to 1;

determining fan consumption power and fan working current according to the current wind gear of a fan of the variable-frequency air conditioning equipment at intervals of the preset time interval so as to obtain n fan consumption powers and n fan working currents;

acquiring element consumption power and element working current of other elements except the compressor and the fan of the variable frequency air conditioning equipment at intervals of the preset time interval to obtain n element consumption power and n element working current;

acquiring the power factor and the frequency conversion efficiency of the frequency conversion air conditioning equipment;

calculating the current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor and the frequency conversion efficiency;

and calculating the current working current according to the n working currents, the n fan working currents and the n element working currents.

6. The control method according to claim 5,

the above-mentioned

Wherein, I_iRepresents the operating current, I_{f_i}Representing the fan operating current, I_{o_i}Represents the element operating current; and

when the heat pump unit of the variable frequency air conditioning equipment is a single-phase unit, the heat pump unit

Wherein, U_iRepresents the operating voltage, I_iRepresenting said operating current, epsilon representing said power factor, ξ representing said conversion efficiency, P_{f_i}Representing the power consumed by the fan, P_{o_i}Representing the power consumed by the element;

when the heat pump unit of the variable frequency air conditioning equipment is a three-phase unit, the heat pump unit

Wherein, U_iRepresents the operating voltage, I_iRepresenting said operating current, epsilon representing said power factor, ξ representing said conversion efficiency, P_{f_i}Representing the power consumed by the fan, P_{o_i}Representing the power consumed by the element.

7. A control device of a variable frequency air conditioner is characterized by comprising:

the setting module is used for setting the maximum consumed power and the maximum working current of the operation of the variable frequency air conditioning equipment;

the acquisition module is used for acquiring the current consumed power and the current working current of the variable frequency air conditioning equipment after the variable frequency air conditioning equipment is started and operates for a preset time;

and the processing module is used for determining whether to adjust the current running frequency of the compressor of the variable-frequency air conditioning equipment according to the maximum power consumption, the current power consumption, the maximum working current and the current working current.

8. The control device according to claim 7, wherein the processing module specifically includes:

the control submodule is used for controlling the current operation frequency to be reduced by a first preset frequency threshold when the current consumed power is greater than or equal to the maximum consumed power;

the first processing submodule is used for adjusting the current operating frequency according to the magnitude relation between the current working current and the maximum working current when the current consumed power is smaller than the maximum consumed power and larger than the preset consumed power;

the second processing submodule is used for determining whether to adjust the current operating frequency according to the magnitude relation between the current working current and the maximum working current when the current consumed power is smaller than or equal to the preset consumed power;

9. The control device of claim 8, wherein the first processing submodule is specifically configured to:

10. The control device according to claim 8, wherein the second processing submodule is specifically configured to:

11. The control device according to any one of claims 7 to 10, wherein the acquisition module includes:

the detection submodule is used for detecting the working current and the working voltage of a compressor of the inverter air-conditioning equipment at intervals of preset time after the inverter air-conditioner is started to operate for the preset time so as to obtain n working currents and n working voltages, wherein n is an integer greater than or equal to 1;

the determining submodule is used for determining fan consumed power and fan working current according to the current wind gear of a fan of the variable-frequency air conditioning equipment at intervals of the preset time interval so as to obtain n fan consumed powers and n fan working currents;

the first obtaining submodule is used for obtaining element consumed power and element working current of other elements except the compressor and the fan of the variable frequency air conditioning equipment at intervals of the preset time so as to obtain n element consumed power and n element working current;

the second obtaining submodule is used for obtaining the power factor and the frequency conversion efficiency of the frequency conversion air conditioning equipment;

the first calculation submodule is used for calculating the current consumed power according to the n working currents, the n working voltages, the n fan consumed powers, the n element consumed powers, the power factor and the frequency conversion efficiency;

and the second calculation submodule is used for calculating the current working current according to the n working currents, the n fan working currents and the n element working currents.

12. The control device according to claim 11,

the above-mentioned

13. A control device of a variable frequency air conditioner is characterized by comprising:

a processor;

memory for storing executable instructions of the processor, wherein the processor is configured to implement the steps of the method according to any one of claims 1 to 6 when executing the executable instructions stored in the memory.

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.

15. An inverter air conditioning apparatus, comprising: the control device of the inverter air conditioner of any one of claims 7 to 13.