CN114383272A - Preheating control method, device and control system of compressor - Google Patents

Preheating control method, device and control system of compressor Download PDF

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Publication number
CN114383272A
CN114383272A CN202210102585.2A CN202210102585A CN114383272A CN 114383272 A CN114383272 A CN 114383272A CN 202210102585 A CN202210102585 A CN 202210102585A CN 114383272 A CN114383272 A CN 114383272A
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China
Prior art keywords
compressor
temperature
excitation signal
frequency
variable
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CN202210102585.2A
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Chinese (zh)
Inventor
胡斌
黄招彬
刘文龙
龙谭
章文凯
韦东
李吉
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GD Midea Air Conditioning Equipment Co Ltd
Foshan Shunde Midea Electric Science and Technology Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
Foshan Shunde Midea Electric Science and Technology Co Ltd
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Priority to CN202210102585.2A priority Critical patent/CN114383272A/en
Publication of CN114383272A publication Critical patent/CN114383272A/en
Pending legal-status Critical Current

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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
    • F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/16—Lubrication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a preheating control method and a preheating control device for a compressor, a compressor control system, a computer readable storage medium and an air conditioner, wherein the method comprises the steps of controlling a variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor; acquiring the temperature of the variable frequency driver; adjusting power provided to the compressor according to the temperature; and controlling the variable-frequency driver according to the adjusted power. Therefore, the method adopts the injection of the excitation signal to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the power provided to the compressor by detecting the temperature of the variable-frequency driver and protects the variable-frequency driver from being damaged.

Description

Preheating control method, device and control system of compressor
Technical Field
The invention relates to the technical field of compressors, in particular to a preheating control method of a compressor, a control system of the compressor, a computer readable storage medium, a preheating control device of the compressor and an air conditioner.
Background
In an air conditioner compressor system, when the outdoor temperature is low, lubricating oil in a compressor can be condensed, and the condensed lubricating oil can cause difficulty in starting the compressor. In order to solve this problem, as shown in fig. 1, an air conditioner manufacturer often wraps a heating belt around the compressor to preheat the compressor, so as to ensure the normal start and operation of the compressor.
However, the compressor is preheated by using the wrapping heating belt, heat is radiated to enter the compressor, the shell of the compressor is heated firstly, and then the shell of the compressor is heated to the cylinder of the compressor, so that the heating efficiency is low, and meanwhile, the complexity of air conditioner production and the cost of the air conditioner are increased by the installation of the heating belt.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a preheating control method for a compressor, which uses excitation signal injection to heat the compressor, so as to preheat the compressor, solve the problems of high cost and low efficiency caused by the conventional preheating using a heating belt, and control the power supplied to the compressor by detecting the temperature of an inverter driver, so as to protect the inverter driver from being damaged.
A second object of the present invention is to propose a control system of a compressor.
A third object of the invention is to propose a computer-readable storage medium.
A fourth object of the present invention is to provide a preheating control apparatus for a compressor.
A fifth object of the present invention is to provide an air conditioner.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a preheating control method for a compressor, including: controlling a variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor; acquiring the temperature of the variable frequency driver; adjusting the power provided by the turning compressor according to the temperature; and controlling the variable-frequency driver according to the adjusted power.
According to the preheating control method of the compressor, firstly, the variable frequency driver of the compressor is controlled to inject an excitation signal into the compressor so as to preheat the compressor, then the temperature of the variable frequency driver is obtained, the power provided for the compressor is adjusted according to the temperature, and finally the variable frequency driver is controlled according to the adjusted power. Therefore, the method adopts the injection of the excitation signal to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the power provided to the compressor by detecting the temperature of the variable-frequency driver and protects the variable-frequency driver from being damaged.
In addition, the preheating control method of the compressor according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, adjusting power supplied to a compressor according to temperature includes: at least one of a switching frequency of the variable frequency drive, a frequency of the excitation signal, and an amplitude of the excitation signal is adjusted based on the temperature to adjust the power provided to the compressor.
According to one embodiment of the invention, adjusting the switching frequency of a variable frequency drive as a function of temperature comprises: if the temperature is greater than the first temperature threshold, reducing the switching frequency of the variable-frequency driver; and if the temperature is less than a second temperature threshold value, increasing the switching frequency of the variable-frequency driver, wherein the second temperature threshold value is less than the first temperature threshold value. Therefore, the method adopts the injection of the excitation signal to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the switching frequency or amplitude of the variable frequency driver by detecting the temperature of the variable frequency driver, and protects the variable frequency driver from being damaged.
According to an embodiment of the invention, after adjusting the switching frequency of the variable frequency drive according to the temperature, the method further comprises: and adjusting the frequency of the excitation signal according to the preset carrier ratio.
According to an embodiment of the present invention, adjusting the frequency of the excitation signal according to a preset carrier ratio includes: if the temperature is greater than the first temperature threshold, reducing the frequency of the excitation signal; if the temperature is less than the second temperature threshold, the frequency of the excitation signal is increased.
According to one embodiment of the present invention, adjusting the amplitude of the excitation signal according to temperature includes: if the temperature is greater than the third temperature threshold, reducing the amplitude of the excitation signal; and if the temperature is less than a fourth temperature threshold value, increasing the amplitude of the excitation signal, wherein the fourth temperature threshold value is less than the third temperature threshold value.
According to an embodiment of the invention, the method further comprises: and determining whether to control the variable-frequency driver to inject the excitation signal into the compressor or not according to the temperature.
According to one embodiment of the invention, determining whether to control the inverter driver to inject the excitation signal into the compressor according to the temperature comprises: if the temperature is higher than the temperature protection threshold of the variable frequency driver, controlling the variable frequency driver to stop injecting the excitation signal into the compressor; and if the temperature is not greater than the temperature protection threshold value, controlling the variable-frequency driver to inject an excitation signal into the compressor.
In order to achieve the above object, a second aspect of the present invention provides a control system for a compressor, including a memory, a processor, and a preheating control program for the compressor, which is stored in the memory and can be executed on the processor, and when the processor executes the preheating control program for the compressor, the preheating control method for the compressor is implemented.
According to the control system of the compressor, when the preheating control program of the compressor is executed by the processor, the preheating control method of the compressor is realized, based on the preheating control method, the compressor is heated by injecting the excitation signal, the preheating of the compressor is realized, the problems of high cost and low efficiency of the traditional method for preheating by using a heating belt are solved, the power provided for the compressor is controlled by detecting the temperature of the variable-frequency driver, and the variable-frequency driver is protected from being damaged.
To achieve the above object, a third embodiment of the present invention provides a computer-readable storage medium having a warm-up control program of a compressor stored thereon, the warm-up control program of the compressor implementing the warm-up control method of the compressor when executed by a processor.
According to the computer-readable storage medium of the embodiment of the invention, based on the preheating control method of the compressor, the compressor is heated by injecting the excitation signal, so that the preheating of the compressor is realized, the problems of high cost and low efficiency caused by the traditional preheating by using a heating belt are solved, the power provided for the compressor is controlled by detecting the temperature of the variable-frequency driver, and the variable-frequency driver is protected from being damaged.
In order to achieve the above object, a fourth aspect of the present invention provides a preheating control apparatus for a compressor, including: the preheating control module is used for controlling the variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor; the temperature acquisition module is used for acquiring the temperature of the variable frequency driver; and the preheating control module is also used for adjusting the power provided for the compressor according to the temperature and controlling the variable-frequency driver according to the adjusted power.
According to the preheating control device of the compressor, the preheating control module controls the variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor, the temperature of the variable frequency driver is obtained through the temperature obtaining module, the preheating control module adjusts the power provided for the compressor according to the temperature, and controls the variable frequency driver according to the adjusted power. Therefore, the device adopts excitation signal injection to heat the compressor, realizes preheating of the compressor, solves the problems of high cost and low efficiency of the traditional heating belt preheating, controls the power provided for the compressor by detecting the temperature of the variable frequency driver, and protects the variable frequency driver from being damaged.
In addition, the preheating control device of the compressor according to the above embodiment of the present invention may further have the following additional features:
according to an embodiment of the present invention, the preheating control module adjusts the power provided to the compressor according to the temperature, and is specifically configured to: at least one of a switching frequency of the variable frequency drive, a frequency of the excitation signal, and an amplitude of the excitation signal is adjusted based on the temperature to adjust the power provided to the compressor.
According to an embodiment of the present invention, the preheating control module adjusts a switching frequency of the variable frequency drive according to the temperature, and is specifically configured to: if the temperature is greater than the first temperature threshold, reducing the switching frequency of the variable-frequency driver; and if the temperature is less than a second temperature threshold value, increasing the switching frequency of the variable-frequency driver, wherein the second temperature threshold value is less than the first temperature threshold value.
According to an embodiment of the invention, the preheating control module, after adjusting the switching frequency of the variable frequency drive according to the temperature, is further specifically configured to: and adjusting the frequency of the excitation signal according to the preset carrier ratio.
According to an embodiment of the present invention, the preheating control module adjusts the frequency of the excitation signal according to a preset carrier ratio, and is specifically configured to: if the temperature is greater than the first temperature threshold, reducing the frequency of the excitation signal; if the temperature is less than the second temperature threshold, the frequency of the excitation signal is increased.
According to an embodiment of the present invention, the preheating control module adjusts the amplitude of the excitation signal according to the temperature, and is specifically configured to: if the temperature is greater than the third temperature threshold, reducing the amplitude of the excitation signal; and if the temperature is less than a fourth temperature threshold value, increasing the amplitude of the excitation signal, wherein the fourth temperature threshold value is less than the third temperature threshold value.
According to an embodiment of the invention, the preheating control module is further configured to: and determining whether to control the variable-frequency driver to inject the excitation signal into the compressor or not according to the temperature.
According to an embodiment of the present invention, the preheating control module determines whether to control the inverter driver to inject the excitation signal into the compressor according to the temperature, and is specifically configured to: if the temperature is higher than the temperature protection threshold of the variable frequency driver, controlling the variable frequency driver to stop injecting the excitation signal into the compressor; and if the temperature is not greater than the temperature protection threshold value, controlling the variable-frequency driver to inject an excitation signal into the compressor.
In order to achieve the above object, a fifth embodiment of the present invention provides an air conditioner, including: a compressor; the variable frequency driver is used for injecting an excitation signal into the compressor so as to preheat the compressor; and the controller is used for acquiring the temperature of the variable-frequency driver of the compressor, adjusting the power provided for the compressor according to the temperature and controlling the variable-frequency driver according to the adjusted power.
According to the air conditioner provided by the embodiment of the invention, the excitation signal is injected into the compressor through the variable-frequency driver so as to preheat the compressor, the controller obtains the temperature of the variable-frequency driver of the compressor, adjusts the power provided for the compressor according to the temperature and controls the variable-frequency driver according to the adjusted power. Therefore, the air conditioner adopts the excitation signal injection to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the power provided for the compressor by detecting the temperature of the variable frequency driver, and protects the variable frequency driver from being damaged.
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
FIG. 1 is a schematic diagram of a compressor preheated by a heating belt according to the related art;
fig. 2 is a flowchart of a preheating control method of a compressor according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a compressor according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a connection of a variable frequency drive according to one embodiment of the present invention;
FIG. 5 is a circuit diagram of a compressor and inverter drive connection according to an embodiment of the present invention;
FIG. 6 is a trapezoidal wave rotating voltage waveform diagram according to one embodiment of the present invention;
FIG. 7 is a graph of a square wave rotating voltage waveform according to one embodiment of the present invention;
FIG. 8 is a graph of a high frequency sine wave rotating voltage waveform according to one embodiment of the present invention;
FIG. 9 is a waveform diagram of a three-phase bridge PWM inverter circuit according to an embodiment of the present invention;
FIG. 10 is a flowchart of a warm-up control method of a compressor according to an embodiment of the present invention;
FIG. 11 is a flowchart of a preheating control method of a compressor according to another embodiment of the present invention;
FIG. 12 is a flowchart of a warm-up control method of a compressor according to still another embodiment of the present invention;
FIG. 13 is a block schematic diagram of a control system for a compressor according to an embodiment of the present invention;
FIG. 14 is a block schematic diagram of a warm-up control apparatus of a compressor according to an embodiment of the present invention;
fig. 15 is a block diagram schematically illustrating an air conditioner according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A preheating control method of a compressor, a control system of a compressor, a computer-readable storage medium, a preheating control device of a compressor, and an air conditioner according to embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 2 is a flowchart of a preheating control method of a compressor according to an embodiment of the present invention.
In one embodiment of the present invention, the compressor 100 is constructed as shown in fig. 3, and includes a rotor 110, a stator 120, windings including a stator winding 121 and a rotor winding, and a terminal 130, which are connected to an external compressor driver 200 in a star connection as shown in fig. 4. The stator 120 is composed of a stator core and a stator winding 121, the stator core is generally composed of a plurality of annular silicon steel sheets which are stacked together, a plurality of small slots are formed in the middle of the silicon steel sheets and used for embedding the stator winding 121, and insulating layers are coated on the silicon steel sheets to insulate the stacked sheets. The stator winding 121 is usually formed by winding an insulated copper wire, the wound copper wire is embedded into a small slot of the stator core according to a certain rule, after the stator winding 121 is embedded into the small slot, the stator winding 121 in the slot is connected according to a wiring method and is connected to a terminal 130 of a junction box, and further, the connection with an external circuit, namely, a variable frequency driver 200 is realized, and the connection mode is as shown in fig. 4. The rotor 110 is arranged in the middle of the stator 120, the rotor 110 is the running part of the motor and is composed of a rotor core, a rotor winding and a rotating shaft, the rotor core is formed by overlapping a plurality of silicon steel sheets with small grooves on the outer circle and is used for placing the rotor winding, the rotor winding wound by insulating wires is embedded in the rotor core according to a certain rule, then the rotor winding is connected according to a star connection method, 3 phase lines are led out, the rotor winding is connected to 3 copper collecting rings of the rotating shaft through an inner hole of the rotating shaft, the collecting rings run along with a rotating shaft instrument, the collecting rings are in friction contact with a fixed electric brush, the electric brush is connected with a rheostat through wires, and therefore current generated by the rotor winding forms a loop through the collecting rings, the electric brush and the rheostat, and the rotating shaft is nested in the middle of the rotor core. Taking fig. 5 as an example, in the inverter driver 200 in this embodiment, Insulated Gate Bipolar Transistors (IGBTs) are used as switching devices to form a three-phase full bridge, signals of upper and lower half bridges on the same bridge arm are opposite, and nodes A, B, C connected to three-phase windings U, V, W of the compressor 100 respectively are formed, and switching of the upper and lower half bridges of each bridge arm is controlled to implement three-phase Pulse Width Modulation (PWM) control, so that dc bus electric energy is converted into three-phase ac electric energy under the PWM control, and then the three-phase ac electric energy is input to the compressor 100 through the nodes A, B, C.
In the application process, the stator 120 is stationary in the space, the rotor 110 can rotate around the shaft, a certain air gap is formed between the stator 120 and the rotor 110 to ensure that the rotor 110 can rotate freely, when three-phase alternating current is supplied to the stator winding 121, a rotating magnetic field is generated, the rotor 110 can cut the rotating magnetic field of the stator 120 to generate induced electromotive force and current, and electromagnetic torque is formed to rotate the motor.
The compressor motor heat mainly comprises two parts, one part is heat generated by winding (stator winding and rotor winding), namely copper loss, and the power formula is as follows:
Figure BDA0003492939970000061
the other part is eddy current and hysteresis loss generated by iron cores (stator iron core and rotor iron core), and the loss also generates heat, and can be generally expressed by formula
Figure BDA0003492939970000062
Figure BDA0003492939970000063
The present invention provides a method for preheating a compressor by using a high frequency electric signal, which indicates that an eddy current loss is positively correlated with a current frequency and a hysteresis loss is positively correlated with a square of the current frequency, and when the frequency is increased to a certain degree, the heat generated by an iron core can be used more to heat the compressor, so that the winding current is too large and the component is not damaged.
It should be noted that the structure of the compressor 100 is only an implementation manner of an embodiment of the present invention, and may be used in practical applications according to practical situations, for example, the rotor 110 is composed of a rotor core and a plurality of rotor magnet pieces disposed on the rotor core, and in this case, the winding is only the stator winding 121.
As shown in fig. 2, the preheating control method of the compressor according to the embodiment of the present invention may include:
and S1, controlling the variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor.
That is, the inverter driver receives the preheating control signal, and controls the inverter to inject the excitation signal to the compressor, thereby performing the preheating operation.
It should be noted that the excitation signal may be a voltage excitation signal or a current excitation signal. The excitation signal may be a voltage excitation signal that varies in rotation, pulse oscillation, or the like, and is not limited to these two variations, and may produce a relatively good heat generation effect by excitation that varies at a high frequency, for example, the excitation signal may be a trapezoidal wave as shown in fig. 6, a square wave as shown in fig. 7, a sine wave as shown in fig. 8, or the like.
Further, the frequency of the excitation signal may be set to be greater than 100 Hz. When the compressor is used for injecting voltage with high frequency (more than 100Hz) change as an excitation signal, the interior of the shell can be directly heated through hysteresis and eddy current loss generated by the stator core and the rotor core, and meanwhile, the rotor of the compressor cannot move due to the high-frequency excitation signal. When the injection current excitation signal is adopted for heating operation, the current magnitude of the input current excitation signal does not exceed the rated current of the compressor generally and can be obtained according to the required temperature debugging, wherein the higher the frequency of the excitation signal is, the more heat is generated, the higher the current is, and the more heat is generated.
And S2, acquiring the temperature of the variable frequency drive.
Specifically, the temperature of the variable frequency drive can be acquired in real time through a temperature sensor arranged on the variable frequency drive. The temperature acquisition operation can set the sampling time according to actual conditions.
And S3, adjusting the power provided by the phase compressor according to the temperature.
According to one embodiment of the present invention, adjusting power supplied to a compressor according to temperature includes: at least one of a switching frequency of the variable frequency drive, a frequency of the excitation signal, and an amplitude of the excitation signal is adjusted based on the temperature to adjust the power provided to the compressor.
That is to say, the real-time acquired temperature of the frequency converter is compared with the set temperature interval, if the temperature is within the set temperature interval, the current temperature of the frequency converter is in a reasonable range, if the temperature is lower than or exceeds the set temperature interval, the current temperature of the frequency converter is abnormal, and at least one of the switching frequency of the frequency conversion driver, the frequency of the excitation signal or the amplitude of the excitation signal is regulated and controlled according to the real-time temperature of the frequency conversion driver and the size relation with the set temperature interval, so that the temperature of the frequency conversion driver is maintained within the set temperature interval, and the IPM module driving the compressor is protected from being damaged. It will be appreciated that as the switching frequency of the variable frequency drive, the frequency of the excitation signal, and/or the amplitude of the excitation signal increases, the power consumption of the variable frequency drive increases, causing increased heating of the variable frequency drive, and as the switching frequency, the frequency of the excitation signal, and/or the amplitude of the excitation signal decreases, the corresponding amount of heating decreases. For example, when the acquired real-time temperature of the variable frequency driver is higher, the switching frequency of the variable frequency driver may be reduced, and the power consumption of the switching device may be reduced to reduce the heating value, or the power consumption of the variable frequency driver may be reduced by reducing the frequency of the output excitation signal to reduce the heating value, or the amplitude of the output excitation signal is reduced to reduce the power consumption of the variable frequency driver, so that the heating value is reduced. The temperature reduction is realized by adjusting one item of the switching frequency of the variable frequency driver, the frequency of the excitation signal or the amplitude of the excitation signal, and in addition, the two items can be simultaneously adjusted to reduce the heat productivity, for example: and simultaneously, the switching frequency and the frequency of the excitation signal of the variable frequency driver are reduced, the switching frequency and the amplitude of the excitation signal of the variable frequency driver are reduced, and the switching frequency and the amplitude of the excitation signal of the variable frequency driver are reduced. In addition, when the cooling requirement is large or the application requirement is high, the method can be realized by adjusting the switching frequency of the variable frequency driver, the frequency of the excitation signal and the amplitude of the excitation signal at the same time, for example, the switching frequency can be adjusted first, then the frequency of the excitation signal is adjusted through temperature change, then the real-time temperature of the variable frequency driver is obtained again, and the frequency of the excitation signal is adjusted according to the current temperature. When the real-time temperature of the obtained variable frequency driver is low, the power consumption of the variable frequency driver can be increased by increasing the switching frequency of the variable frequency driver, the frequency of the output excitation signal or the amplitude of the excitation signal, and the calorific value is increased.
Further, taking fig. 5 as an example, the inverter driver 200 is connected to a dc voltage source, and may use a dc bus as a power source, and control on/off of switching devices corresponding to PWM control signals (UP, VP, WP, UN, VN, WN) transmitted from the inverter controller, so that a series of pulses having equal amplitude but different widths are output from an output terminal, i.e., node A, B, C, to generate excitation signals, i.e., PWM waves applied to windings of U-phase, V-phase, and W-phase of the compressor 100, that is, these pulses are used in the PWM control process instead of sine waves or required waveforms, and the widths of the pulses are modulated according to a certain rule, so that the voltage level of the excitation signals output from the inverter driver 200 may be changed, and the output frequency may also be changed. The PWM control method can accurately calculate the width and interval of each pulse in the PWM waveform by a calculation method by giving the frequency and amplitude of the excitation signal output by the variable frequency driver 200 and the number of pulses in a half cycle, so as to control the on/off of the switching device in the inverter driver 200, thereby obtaining the required PWM waveform, i.e., the excitation signal. In addition, a control signal corresponding to the switching device may be obtained by a modulation method, that is, a PWM wave, which is a desired PWM control output waveform, may be obtained by modulating a signal using a waveform of an excitation signal, which is a desired output waveform, as a modulation signal and using the modulated signal as a carrier wave, and controlling the switching device in accordance with the width and interval of each pulse in the PWM wave. The PWM control will be described in detail below by taking the modulation method as an example.
As shown in FIG. 9, urU、urVAnd urWRespectively, a modulated signal u corresponding to U, V, W of the compressor respectivelyrU、urVAnd urWA sine wave, a triangular wave u, with a phase difference of 120 degrees in sequencecAs a carrier, u is presetc、urU、urVAnd urWAnd inputting the PWM control signal into an inverter controller, and outputting a corresponding PWM control signal to control the on-off of the switching device through the modulation operation of the inverter controller. Referring to the circuit diagram shown in fig. 5, the modulation signal U input to the inverter controller is the U-phase excitation signal output as an examplerUAnd a carrier signal ucMaking a comparison when urUGreater than ucWhen the switching device is in a high level state, the inverter controller outputs control signals for controlling UH (ultra high frequency) conduction and UL (ultra high frequency) disconnection to control the UH conduction and UL disconnection of the switching device, and when u is in a high level staterUGreater than ucWhen the inverter controller outputs control signals for controlling UH turn-off and UL turn-on, the corresponding control switch device UH turn-off and UL turn-on, the corresponding pulse is at low level, and so on, and the signal u is modulatedrUAnd a triangular wave carrier ucTo output the on-off signal for controlling the switching device corresponding to UH and UL, thereby forming the pulse output shown in the figure, i.e. the PWM waveform corresponding to U. That is, the on-off of the switching device is controlled at the intersection point of the modulation signal and the carrier signal, so as to obtain a pulse with a width proportional to the amplitude of the signal wave. And urU、urVAnd urWThe corresponding modulation signal is the waveform of the preset output excitation signal, so that the waveform and the amplitude of the excitation signal output by the variable frequency driver 200 can be controlled directly by adjusting the frequency and the amplitude of the modulation signal input to the variable frequency controller.
It should be noted that the above-mentioned adjustment manner of the switching frequency, the frequency of the excitation signal, and the amplitude of the excitation signal is merely an example of one specific embodiment, and can be set according to actual situations.
The following is a detailed description of a method for controlling the switching frequency of the variable frequency drive by temperature adjustment and a method for controlling the amplitude of the excitation signal by temperature adjustment, respectively.
When adjusting the switching frequency of the variable frequency drive by temperature, according to one embodiment of the invention, adjusting the switching frequency of the variable frequency drive according to temperature comprises: if the temperature is greater than the first temperature threshold, reducing the switching frequency of the variable-frequency driver; and if the temperature is less than a second temperature threshold value, increasing the switching frequency of the variable-frequency driver, wherein the second temperature threshold value is less than the first temperature threshold value. The first temperature threshold and the second temperature threshold can be set according to actual conditions.
Specifically, assume that the acquired current temperature of the variable frequency drive is T and the first temperature threshold is T1The second temperature threshold is T2，T1Greater than T2The switching frequency adjustment Δ f of the single-conversion driver is preset. Firstly, the temperature T and a first temperature threshold value T are measured1In comparison, if T is greater than T1If so, the switching frequency of the variable frequency driver is decreased by delta f and is taken as the current operating switching frequency, the temperature T under the current switching frequency work is continuously obtained, and the temperature T are obtained again1In comparison, if T is still greater than T1Then, the switching frequency is continuously decreased by delta f, and the above operation is repeated until T is less than or equal to T1And then comparing T with a second temperature threshold T2For comparison.
If the temperature T is less than T2The switching frequency of the variable-frequency drive is increased by Δ f and the temperature T recovered is again compared with T1、T2In comparison, if T is still less than T2Then the switching frequency is continued to be increased by Δ f until the temperature T is at [ T [ ]2,T1]In the interval range of (1), i.e., T satisfies T or more2And is less than or equal to T1And the variable frequency driver keeps the current switching frequency to continue working.
The Δ f may be set according to actual conditions, and the temperature T and the first temperature threshold T may be set1A second temperature threshold T2The comparison method is only one specific embodiment of the present invention, and in the practical application process, the temperature T may also be compared with the second temperature threshold T first2Size of (2)Is then related to the first temperature threshold T1In comparison, the specific flow can be set according to the actual situation.
Further, according to an embodiment of the invention, after adjusting the switching frequency of the variable frequency drive according to the temperature, the method further comprises: and adjusting the frequency of the excitation signal according to the preset carrier ratio. The preset carrier ratio can be set according to actual conditions. According to an embodiment of the present invention, adjusting the frequency of the excitation signal according to a preset carrier ratio includes: if the temperature is greater than the first temperature threshold, reducing the frequency of the excitation signal; if the temperature is less than the second temperature threshold, the frequency of the excitation signal is increased.
Specifically, the temperature is continuously set as T, and the first temperature threshold is set as T1The second temperature threshold is T2，T1Greater than T2The switching frequency adjustment Δ f of the single-time variable frequency drive is preset as an example, and the preset carrier ratio is N. If the temperature T is greater than the first temperature threshold T1If the temperature T is less than the second temperature threshold T, the frequency of the excitation signal is synchronously decreased according to the preset carrier ratio N while the switching frequency of the variable frequency driver is decreased by delta f2Increasing the switching frequency of the variable frequency driver by delta f, and increasing the frequency of the excitation signal according to the preset carrier ratio N until the acquired current temperature T is in [ T [ [ T ]2,T1]The preheating operation is continued by keeping the current switching frequency of the variable frequency drive and the frequency of the excitation signal in the temperature interval. The specific control method can be similar to the control method for adjusting the switching frequency of the variable frequency driver by temperature, and is not described herein again.
When the temperature is used for adjusting the amplitude of the excitation signal, according to an embodiment of the present invention, the adjusting the amplitude of the excitation signal according to the temperature includes: if the temperature is greater than the third temperature threshold, reducing the amplitude of the excitation signal; and if the temperature is less than a fourth temperature threshold value, increasing the amplitude of the excitation signal, wherein the fourth temperature threshold value is less than the third temperature threshold value. The third temperature threshold and the fourth temperature threshold can be set according to actual conditions.
Specifically, assume the third temperatureThe threshold value is T3The fourth temperature threshold is T4，T3Greater than T4The unit adjustment amplitude of the excitation signal can be preset to be delta U, and the delta U is used as an adjustment unit for each amplitude rise or fall in the amplitude adjustment process. During operation, the acquired temperature T and a third temperature threshold value T are firstly compared3In comparison, if T is greater than T3If the current temperature of the variable frequency driver is over-high, the amplitude of the excitation signal is reduced by delta U, the temperature of the variable frequency driver with the reduced amplitude is measured again, and the temperature T which are obtained again are obtained3In comparison, if T is still greater than T3Then the amplitude of the excitation signal is reduced again by DeltaU, and the above operation is repeated until the obtained temperature T is less than or equal to T3Then the temperature T is compared with a fourth temperature threshold T4And (6) comparing.
If less than or equal to T3Temperature T is less than T4The amplitude of the excitation signal rises by Δ U and the temperature T recovered is again compared with T3、T4In comparison, if T is still less than T4Then, the amplitude of the excitation signal is continuously increased by DeltaU, if T is in [ T ]4,T3]The amplitude of the current excitation signal is kept in the interval range of (2), and the preheating operation is continued.
It should be noted that Δ U can be set according to actual conditions, and the temperature and the third temperature threshold are T3A fourth temperature threshold T4The comparison method is only one specific embodiment of the present invention, and in the practical application process, the temperature may also be compared with the fourth temperature threshold T first4Then the third temperature threshold is T3In comparison, the specific operation flow can be set according to the actual situation.
And S4, controlling the variable frequency driver according to the adjusted switching frequency or amplitude.
Specifically, a control signal corresponding to the determined switching frequency or the amplitude of the excitation signal is sent to the variable frequency driver, and the variable frequency driver is controlled to inject the excitation signal into the compressor, so that the preheating operation is performed.
It should be noted that, in addition to the temperature of the variable frequency drive in the method being used for determining the switching frequency or the amplitude of the excitation signal of the variable frequency drive, according to an embodiment of the present invention, the preheating control method further includes: and determining whether to control the variable-frequency driver to inject the excitation signal into the compressor or not according to the temperature.
According to one embodiment of the invention, determining whether to control the inverter driver to inject the excitation signal into the compressor according to the temperature comprises: if the temperature is higher than the temperature protection threshold of the variable frequency driver, controlling the variable frequency driver to stop injecting the excitation signal into the compressor; and if the temperature is not greater than the temperature protection threshold value, controlling the variable-frequency driver to inject an excitation signal into the compressor. Wherein, the temperature protection threshold value can be set according to the actual situation.
Specifically, assume a temperature protection threshold of TlimitWhen the preheating command is sent, the temperature T and T of the variable frequency drive obtained by detection are firstly detectedlimitIn comparison, if T is greater than TlimitWhen the temperature of the variable frequency driver is over high, outputting a stop control signal to the variable frequency driver to stop the output of the excitation signal, and detecting the temperature T of the variable frequency driver again until the temperature T is less than or equal to TlimitAnd outputting the starting control signal to the variable frequency driver to inject the excitation signal to the compressor, namely starting the output of the excitation signal, thereby protecting the variable frequency driver for driving the compressor from being damaged.
As an embodiment of the present invention, as shown in fig. 10, the preheating control method of the compressor may include:
s101, a preheating command is received.
S102, detecting the temperature T of the variable frequency driver.
S103, judging whether the temperature T is greater than a temperature protection threshold value T or notlimit. If yes, go to step S104; if not, go to step S105.
S104, the excitation signal output is closed, and the step S102 is returned.
And S105, starting the excitation signal output.
S106, judging whether the temperature T is larger than a first temperature threshold value T or not1. If yes, go to step S107; if not, the user can not select the specific application,step S108 is performed.
S107, switching frequency f of variable frequency driverc＝fc-. DELTA.f, return to step S102.
S108, judging whether the temperature T is smaller than a second temperature threshold value T2. If yes, go to step S109; if not, go to step S110.
S109, switching frequency f of variable frequency driverc＝fcAnd +/-af, returning to step S102.
And S110, controlling the variable-frequency driver to inject an excitation signal into the compressor, and preheating the compressor.
As another embodiment of the present invention, as shown in fig. 10, the preheating control method of a compressor may include:
s201, a preheating command is received.
S202, detecting the temperature T of the variable frequency drive.
S203, judging whether the temperature T is larger than a temperature protection threshold value T or notlimit. If yes, go to step S204; if not, go to step S205.
S204, the excitation signal output is closed, and the step S202 is returned.
And S205, starting the excitation signal output.
S206, judging whether the temperature T is larger than a first temperature threshold value T1. If yes, go to step S207; if not, step S209 is executed.
S207, switching frequency f of variable frequency driverc＝fc-△f。
In step S208, the voltage frequency of the high-frequency excitation signal is lowered according to the carrier ratio, and the process returns to step S202.
S209, judging whether the temperature T is less than a second temperature threshold value T2. If yes, go to step S210; if not, go to step S212.
S210, switching frequency f of variable frequency driverc＝fc+△f。
S211, according to the carrier ratio, the voltage frequency of the high-frequency excitation signal is increased, and the step S202 is returned.
S212, controlling the variable frequency driver to inject an excitation signal into the compressor, and preheating the compressor.
As another embodiment of the present invention, as shown in fig. 12, the preheating control method of a compressor may include:
s301, a preheating command is received.
S302, detecting the temperature T of the variable frequency driver.
S303, judging whether the temperature T is larger than a temperature protection threshold value T or notlimit. If yes, go to step S304; if not, step S305 is executed.
S304, the excitation signal output is closed, and the step S302 is returned.
And S305, starting the excitation signal output.
S306, judging whether the temperature T is greater than a third temperature threshold value T3. If yes, go to step S307; if not, go to step S308.
S307, high-frequency excitation signal voltage amplitude Uref＝UrefΔ U, return to step S102.
S308, judging whether the temperature T is less than a fourth temperature threshold T4. If yes, go to step S309; if not, go to step S310.
S309, high-frequency excitation signal voltage amplitude Uref＝UrefAnd +. DELTA.U, return to step S102.
And S310, controlling the variable-frequency driver to inject an excitation signal into the compressor, and preheating the compressor.
In summary, according to the preheating control method of the compressor in the embodiment of the present invention, the inverter driver of the compressor is first controlled to inject the excitation signal into the compressor to preheat the compressor, then the temperature of the inverter driver is obtained, the power provided to the compressor is adjusted according to the temperature, and finally the inverter driver is controlled according to the adjusted power. Therefore, the method adopts the injection of the excitation signal to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the power provided to the compressor by detecting the temperature of the variable-frequency driver and protects the variable-frequency driver from being damaged.
The invention further provides a control system of the compressor, which corresponds to the embodiment.
As shown in fig. 13, the control system 300 of the compressor according to the embodiment of the present invention may include a memory 310, a processor 320, and a preheating control program of the compressor, which is stored in the memory 310 and is executable on the processor 320, and when the processor 320 executes the preheating control program of the compressor, the preheating control method of the compressor is implemented.
According to the control system of the compressor, when the preheating control program of the compressor is executed by the processor, the preheating control method of the compressor is realized, based on the preheating control method, the compressor is heated by injecting the excitation signal, the preheating of the compressor is realized, the problems of high cost and low efficiency of the traditional method for preheating by using a heating belt are solved, the power provided for the compressor is controlled by detecting the temperature of the variable-frequency driver, and the variable-frequency driver is protected from being damaged.
The invention further provides a computer readable storage medium corresponding to the above embodiment.
The computer readable storage medium of an embodiment of the present invention has a preheating control program of a compressor stored thereon, and the preheating control program of the compressor realizes the preheating control method of the compressor described above when executed by a processor.
According to the computer-readable storage medium of the embodiment of the invention, based on the preheating control method of the compressor, the compressor is heated by injecting the excitation signal, so that the preheating of the compressor is realized, the problems of high cost and low efficiency caused by the traditional preheating by using a heating belt are solved, the power provided for the compressor is controlled by detecting the temperature of the variable-frequency driver, and the variable-frequency driver is protected from being damaged.
The invention further provides a preheating control device of the compressor, which corresponds to the embodiment.
As shown in fig. 14, the preheating control device of the compressor according to the embodiment of the present invention may include: a preheating control module 10 and a temperature acquisition module 20.
The preheating control module 10 is configured to control the inverter driver of the compressor to inject an excitation signal into the compressor, so as to preheat the compressor. The temperature acquisition module 20 is used for acquiring the temperature of the variable frequency drive. The pre-heating control module 10 is also used to adjust the power supplied to the compressor according to the temperature and to control the variable frequency drive according to the adjusted power.
It should be noted that, the details of the preheating control device of the compressor according to the embodiment of the present invention are not disclosed, and please refer to the details disclosed in the preheating control method of the compressor according to the above embodiment of the present invention, which are not described herein again.
According to the preheating control device of the compressor, the preheating control module controls the variable frequency driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor, the temperature of the variable frequency driver is obtained through the temperature obtaining module, the preheating control module adjusts the power provided for the compressor according to the temperature, and controls the variable frequency driver according to the adjusted power. Therefore, the device adopts excitation signal injection to heat the compressor, realizes preheating of the compressor, solves the problems of high cost and low efficiency of the traditional heating belt preheating, controls the power provided for the compressor by detecting the temperature of the variable frequency driver, and protects the variable frequency driver from being damaged.
The invention further provides an air conditioner corresponding to the embodiment.
As shown in fig. 15, the air conditioner according to the embodiment of the present invention may include: compressor 100, inverter drive 200, and controller 400.
The inverter driver 200 is used to inject an excitation signal into the compressor 100 to preheat the compressor 100. The controller 400 is configured to obtain a temperature of the inverter driver 200 of the compressor 100, adjust power supplied to the compressor 100 according to the temperature, and control the inverter driver 200 according to the adjusted power.
According to the air conditioner provided by the embodiment of the invention, the excitation signal is injected into the compressor through the variable-frequency driver so as to preheat the compressor, the controller obtains the temperature of the variable-frequency driver of the compressor, adjusts the power provided for the compressor according to the temperature and controls the variable-frequency driver according to the adjusted power. Therefore, the air conditioner adopts the excitation signal injection to heat the compressor, realizes the preheating of the compressor, solves the problems of high cost and low efficiency of the traditional preheating by using a heating belt, controls the power provided for the compressor by detecting the temperature of the variable frequency driver, and protects the variable frequency driver from being damaged.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as 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.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (12)

1. A warm-up control method of a compressor, comprising:
controlling an inverter driver of the compressor to inject an excitation signal into the compressor to preheat the compressor;
acquiring the temperature of the variable frequency driver;
adjusting power provided to the compressor based on the temperature;
and controlling the variable-frequency driver according to the adjusted power.
2. The preheating control method of the compressor according to claim 1, wherein adjusting power supplied to the compressor according to the temperature includes:
adjusting at least one of a switching frequency of the variable frequency drive, a frequency of the excitation signal, and an amplitude of the excitation signal based on the temperature to adjust power provided to the compressor.
3. The method of claim 2, wherein adjusting the switching frequency of the variable frequency drive as a function of the temperature comprises:
if the temperature is greater than a first temperature threshold value, reducing the switching frequency of the variable-frequency driver;
and if the temperature is less than a second temperature threshold value, increasing the switching frequency of the variable-frequency driver, wherein the second temperature threshold value is less than the first temperature threshold value.
4. The method of claim 3, wherein after adjusting the switching frequency of the variable frequency drive as a function of the temperature, the method further comprises:
and adjusting the frequency of the excitation signal according to a preset carrier ratio.
5. The method of claim 4, wherein the adjusting the frequency of the excitation signal according to the preset carrier ratio comprises:
if the temperature is greater than the first temperature threshold, reducing the frequency of the excitation signal;
if the temperature is less than the second temperature threshold, increasing the frequency of the excitation signal.
6. The method of claim 2, wherein adjusting the amplitude of the excitation signal as a function of the temperature comprises:
if the temperature is greater than a third temperature threshold, reducing the amplitude of the excitation signal;
if the temperature is less than a fourth temperature threshold, increasing the amplitude of the excitation signal, wherein the fourth temperature threshold is less than the third temperature threshold.
7. The method according to any one of claims 1-6, further comprising:
and determining whether to control the variable-frequency driver to inject an excitation signal into the compressor or not according to the temperature.
8. The method of claim 7, wherein the determining whether to control the variable frequency drive to inject the excitation signal into the compressor based on the temperature comprises:
if the temperature is greater than the temperature protection threshold value of the variable-frequency driver, controlling the variable-frequency driver to stop injecting an excitation signal into the compressor;
and if the temperature is not greater than the temperature protection threshold value, controlling the variable-frequency driver to inject an excitation signal into the compressor.
9. A control system of a compressor, comprising a memory, a processor and a preheating control program of the compressor stored on the memory and operable on the processor, wherein the processor implements the preheating control method of the compressor according to any one of claims 1 to 8 when executing the preheating control program of the compressor.
10. A computer-readable storage medium, characterized in that a warm-up control program of a compressor is stored thereon, which when executed by a processor implements the warm-up control method of the compressor according to any one of claims 1 to 7.
11. A warm-up control apparatus of a compressor, comprising:
the preheating control module is used for controlling an inverter driver of the compressor to inject an excitation signal into the compressor so as to preheat the compressor;
the temperature acquisition module is used for acquiring the temperature of the variable frequency driver;
the preheating control module is also used for adjusting the power provided for the compressor according to the temperature and controlling the variable-frequency driver.
12. An air conditioner, comprising:
a compressor;
an inverter drive for injecting an excitation signal to the compressor to preheat the compressor;
and the controller is used for acquiring the temperature of the variable-frequency driver of the compressor, adjusting the power provided for the compressor according to the temperature and controlling the variable-frequency driver according to the adjusted power.
CN202210102585.2A 2022-01-27 2022-01-27 Preheating control method, device and control system of compressor Pending CN114383272A (en)

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CN113531762A (en) * 2021-06-18 2021-10-22 宁波奥克斯电气股份有限公司 Air conditioner control method and device and air conditioner

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