CN108361934B - Starting control method of air conditioner - Google Patents

Starting control method of air conditioner Download PDF

Info

Publication number
CN108361934B
CN108361934B CN201810277318.2A CN201810277318A CN108361934B CN 108361934 B CN108361934 B CN 108361934B CN 201810277318 A CN201810277318 A CN 201810277318A CN 108361934 B CN108361934 B CN 108361934B
Authority
CN
China
Prior art keywords
speed
frequency
compressor
air conditioner
expansion valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810277318.2A
Other languages
Chinese (zh)
Other versions
CN108361934A (en
Inventor
罗荣邦
王飞
许文明
丁爽
李皖皖
张心怡
李阳
袁俊军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
Chongqing Haier Air Conditioner Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
Chongqing Haier Air Conditioner Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Haier Smart Home Co Ltd, Chongqing Haier Air Conditioner Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN201810277318.2A priority Critical patent/CN108361934B/en
Publication of CN108361934A publication Critical patent/CN108361934A/en
Application granted granted Critical
Publication of CN108361934B publication Critical patent/CN108361934B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of air conditioners, in particular to a starting control method of an air conditioner. The invention aims to solve the problems of poor universality and poor user experience of the conventional air conditioner starting control method. To this end, the boot control method of the present invention comprises: acquiring the rotating speed of the inner fan; calculating the closing speed of the expansion valve according to a first fitting formula; calculating the acceleration of the outer fan according to a second fitting formula; calculating the frequency increasing speed of the compressor in the frequency increasing stage according to a third fitting formula; controlling the expansion valve to close the valve to a target opening degree according to the valve closing speed; controlling the outer fan to increase the speed to a target rotating speed according to the acceleration; preferably, when the expansion valve is closed to the target opening degree and the external fan is accelerated to the target rotating speed, the compressor is controlled to perform frequency increasing according to the frequency increasing speed. Through the control mode, the starting control method of the air conditioner can improve the universality of the air conditioner and improve the use experience of users.

Description

Starting control method of air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a starting control method of an air conditioner.
Background
With the increasing living standard, the requirements of people on the quality of life are higher and higher, and the requirements are particularly obvious on household appliances. Taking an air conditioner as an example, in order to meet the requirement of a user for quick heating and bring comfortable use experience to the user, when the conventional air conditioner is just started, the compressor is generally quickly increased to a higher frequency (for example, the compressor is increased to the maximum working frequency) for operation. In the process of rapidly raising the frequency of the compressor to a high frequency, in order to ensure normal oil return, the compressor is usually forced to operate for a period of time at a certain or certain fixed frequency (oil return frequency), and the frequency is continuously raised after the oil return is stable. However, the arrangement mode of forcing the compressor to continuously operate for a period of time at the oil return frequency enables the frequency rising time of the compressor to be too long in the process of starting the air conditioner for rapid heating, and the speed of the compressor reaching the maximum working frequency is slowed down, so that the effect of rapid heating of the air conditioner is influenced.
In order to solve the above problems of the air conditioner, the patent application with publication number CN107576016A discloses a method and a system for controlling an air conditioner. Specifically, the control method mainly comprises the following steps: starting a compressor of an air conditioner; continuously increasing the frequency of the compressor in stages according to a plurality of set speeds; after the frequency is continuously increased in stages, judging whether the frequency of the compressor reaches a first target frequency; and stopping the frequency increasing of the compressor when the frequency of the compressor reaches the first target frequency. The method mainly shortens the frequency rising time of the compressor and achieves the purpose of rapid heating by canceling the continuous operation stage on the oil return frequency in the frequency rising process of the compressor and then enabling the compressor to continuously rise the frequency in stages at different frequency rising speeds after the compressor is started. Although the above control method solves the problem of poor quick heating effect in the prior art to a certain extent, the following defects are also unavoidable: firstly, not all users need to quickly heat after the air conditioner is started, nor all users are suitable for quickly heating under all environmental conditions, so that the control method has the problem of poor universality in actual use. Secondly, the rapid frequency rise of the air conditioner can correspondingly cause the noise to be increased, and for some special users or occasions (such as insomnia users or libraries), the use experience of the users is greatly influenced by the generation of the noise.
Accordingly, there is a need in the art for a new method for controlling the start-up of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems of poor universality and poor user experience existing in the conventional start-up control method for the air conditioner, the present invention provides a start-up control method for an air conditioner, wherein the air conditioner comprises a compressor, an expansion valve, an external fan and an internal fan, and the start-up control method comprises:
acquiring the rotating speed of the inner fan;
calculating the valve closing speed of the expansion valve according to a first fitting formula;
calculating the acceleration of the outer fan according to a second fitting formula;
calculating the frequency increasing speed of the compressor in the frequency increasing stage according to a third fitting formula;
controlling the expansion valve to close the valve to a target opening degree according to the valve closing speed;
controlling the outer fan to increase to a target rotating speed according to the acceleration while, before or after the expansion valve closes to the target opening according to the valve closing speed;
when the expansion valve and/or the outer fan reach set conditions, controlling the compressor to perform frequency boosting according to the frequency boosting speed;
the first fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the valve closing speed of the expansion valve; the second fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the acceleration of the outer fan; and the third fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the frequency increasing speed of the compressor.
In a preferred technical solution of the start-up control method of the air conditioner, the start-up control method further includes:
judging whether the frequency of the compressor reaches a stable working frequency or not;
and when the frequency of the compressor reaches the stable working frequency, controlling the compressor to stop increasing the frequency.
In a preferred technical solution of the above startup control method of an air conditioner, the stable operating frequency is determined according to a corresponding relationship between the outdoor environment temperature and the stable operating frequency.
In a preferred embodiment of the start-up control method of the air conditioner, the step of controlling the compressor to perform frequency boosting according to the frequency boosting speed when the expansion valve and/or the outer fan reach a set condition further includes:
and when the opening degree of the expansion valve reaches the reference opening degree and/or when the external fan reaches the maximum rotating speed, controlling the compressor to perform frequency boosting according to the frequency boosting speed.
In a preferred embodiment of the start-up control method of the air conditioner, after the step of controlling the expansion valve to close to the target opening degree according to the valve closing speed, the start-up control method further includes:
and adjusting the opening degree of the expansion valve according to the target exhaust temperature of the compressor.
In a preferred technical solution of the startup control method of the air conditioner, after the step of "controlling the external fan to increase in speed to the target rotation speed according to the acceleration", the startup control method further includes:
and adjusting the rotating speed of the outer fan according to the corresponding relation between the outdoor environment temperature and/or the frequency of the compressor and the rotating speed of the outer fan.
In a preferred technical solution of the above starting control method of an air conditioner, the frequency increasing stage includes a plurality of frequency increasing sub-stages, the third fitting formula correspondingly includes a plurality of third fitting sub-formulas, and calculating the frequency increasing speed of the compressor in the frequency increasing stage according to the third fitting formula further includes:
and respectively calculating the frequency increasing speed of each frequency increasing sub-stage of the compressor according to each third fitting sub-formula.
In a preferred embodiment of the method for controlling starting of an air conditioner, the step of controlling the compressor to perform frequency increase according to the frequency increasing speed further includes:
and controlling the compressor to continuously increase the frequency according to the frequency increasing speed of each frequency increasing sub-stage.
In the preferable technical scheme of the starting control method of the air conditioner, the rotating speed of the inner fan is in direct proportion to the closing speed of the expansion valve; and/or the rotating speed of the inner fan is in direct proportion to the acceleration of the outer fan; and/or the rotating speed of the inner fan is in direct proportion to the frequency increasing speed of the compressor.
In the preferable technical scheme of the starting control method of the air conditioner, the frequency increasing speed is any value of 0.5Hz-30 Hz.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, a method for controlling the start-up of an air conditioner includes: acquiring the rotating speed of the inner fan; calculating the closing speed of the expansion valve according to a first fitting formula; calculating the acceleration of the outer fan according to a second fitting formula; calculating the frequency increasing speed of the compressor in the frequency increasing stage according to a third fitting formula; controlling the expansion valve to close the valve to a target opening degree according to the valve closing speed; controlling the outer fan to increase the speed to a target rotating speed according to the acceleration; preferably, when the valve closing speed of the expansion valve is closed to a target opening degree and the speed of the external fan is increased to a target rotating speed, the compressor is controlled to perform frequency increasing according to the frequency increasing speed; the first fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the valve closing speed of the expansion valve; the second fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the acceleration of the outer fan; and the third fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the frequency increasing speed of the compressor. The method comprises the steps of determining a first fitting formula, a second fitting formula and a third fitting formula in advance, calculating the valve closing speed of an expansion valve, the acceleration of an outer fan and the frequency increasing speed of a compressor in a frequency increasing stage according to the first fitting formula, the second fitting formula and the third fitting formula, further controlling the expansion valve to close the valve to a target opening according to the valve closing speed, controlling the outer fan to increase the speed to a target rotating speed according to the acceleration, and controlling the compressor to increase the frequency according to the frequency increasing speed while the valve is closed to the target opening and the speed is increased to the target rotating speed.
Specifically, the rotation speed of the inner fan is in direct proportion to the closing speed of the expansion valve, the acceleration of the outer fan and the rising speed of the compressor. When the rotating speed of the inner fan is low, the user is not strongly willing to control the air conditioner to carry out rapid refrigeration/heating, at the moment, the valve closing speed of the expansion valve, the acceleration of the outer fan and the frequency raising speed of the compressor which are calculated according to the first fitting formula, the second fitting formula and the third fitting formula are relatively low, when the expansion valve is closed to a target opening degree according to the valve closing speed and the outer fan is raised to a target rotating speed according to the acceleration, the compressor is raised according to the frequency raising speed, the refrigeration/heating effect of the air conditioner can be ensured, and meanwhile, the operation stability and the operation noise of the expansion valve, the outer fan and the compressor are improved; when the rotating speed of the inner fan is high, it is indicated that a user urgently needs the air conditioner to perform rapid cooling/heating at the moment, the valve closing speed of the expansion valve, the acceleration of the outer fan and the frequency raising speed of the compressor which are calculated according to the first fitting formula, the second fitting formula and the third fitting formula are relatively high, when the expansion valve is quickly closed to a target opening according to the valve closing speed and the outer fan is quickly raised to a target rotating speed according to the acceleration, the compressor is quickly raised according to the frequency raising speed, so that rapid cooling/heating of the air conditioner can be realized, the cooling/heating time is greatly shortened, and good use experience is brought to the user. And through repeated tests, observation, analysis and comparison of the inventor, under the condition of adopting the technical scheme of the invention to carry out quick refrigeration/heating, the frequency increasing speed of the air conditioner can be increased by times or even tens of times compared with the prior art, and the frequency jump of the air conditioner is realized. In addition, the opening degree of the expansion valve is reduced to the target opening degree before the compressor is started, the opening degree of the expansion valve can be matched with the compressor when the compressor is started, the situation that the opening degree of the expansion valve is not matched with the compressor due to the fact that the expansion valve is started together with the compressor is avoided, and the refrigerating/heating effect after the compressor is started is further improved. The outer fan is controlled to be accelerated to the target rotating speed before the compressor is started, namely, the air is driven to flow at the high rotating speed in advance to dissipate heat of the compressor and the outdoor unit, so that the compressor has good heat dissipation conditions when being started, the situation that the heat dissipation effect of the compressor is poor due to the fact that the outer fan is started along with the compressor is avoided, and the refrigerating/heating effect of the compressor after being started is further improved.
Drawings
The startup control method of an air conditioner of the present invention is described below with reference to the accompanying drawings. In the drawings:
the power-on control method of the air conditioner according to the present invention will be described with reference to the accompanying drawings in conjunction with a cooling mode of the air conditioner. In the drawings:
FIG. 1 is a flowchart illustrating a method for controlling a start-up of an air conditioner according to the present invention;
FIG. 2 is a graph showing the closing speed of an expansion valve in the start-up control method of the air conditioner according to the present invention;
fig. 3 is a graph showing an acceleration curve of an external fan in the start-up control method of the air conditioner according to the present invention;
fig. 4 is a graph illustrating an increasing frequency speed of a compressor in the method for controlling a start-up of an air conditioner according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present invention is described with reference to the operation of an air conditioner in a cooling mode, such an application scenario is not always the same, and those skilled in the art may also apply the method of the present invention to other application scenarios, such as a heating mode or a dehumidifying mode of an air conditioner, without departing from the principle of the present invention.
First, it should be noted that, in general, air conditioners each include an indoor unit and an outdoor unit, where the indoor unit is provided with an indoor heat exchanger, an internal fan, and the like, and the outdoor unit is provided with a compressor, an electronic expansion valve (hereinafter, referred to as an expansion valve), an external fan, an outdoor heat exchanger, and the like. The indoor unit is also usually provided with a control system for controlling the operation of the air conditioner, and the control system comprises a control module, a judgment module, a calculation module, an acquisition module and the like. The physical forms of the control module, the judgment module, the calculation module and the acquisition module may be independent from each other, and certainly, the control module, the judgment module, the calculation module and the acquisition module may also be functional units integrated on one physical module. The control system of the air conditioner comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the computer program can complete the functions of the control module, the judgment module and the acquisition module. The physical arrangement of the air conditioners is the conventional arrangement mode of the air conditioners in the prior art, and should not be considered as the limitation of the control method of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling a start-up of an air conditioner according to the present invention.
As shown in fig. 1, in order to solve the problems of poor universality and poor user experience of the conventional start-up control method for the air conditioner, the invention provides a start-up control method for the air conditioner, which mainly comprises the following steps:
s100, acquiring the rotating speed of an inner fan; if the user presses the switch to start the air conditioner and selects an operation mode (such as refrigeration) and an operation wind speed, the air conditioner acquires the operation wind speed set by the user, namely the rotating speed of the inner fan, by receiving the instruction of the user;
s200, calculating the valve closing speed of the electronic expansion valve according to a first fitting formula, wherein if the first fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the valve closing speed of the electronic expansion valve, and the rotating speed of the inner fan and the valve closing speed of the electronic expansion valve are in a direct proportion relation, namely the higher the rotating speed of the inner fan is, the faster the valve closing speed of the electronic expansion valve is, and the control system of the air conditioner calculates the valve closing speed of the electronic expansion valve in the valve closing stage according to the first fitting formula;
s300, calculating the acceleration of the outer fan according to a second fitting formula, wherein if the second fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the acceleration of the outer fan, and the rotating speed of the inner fan and the acceleration of the outer fan are in a direct proportion relation, namely the higher the rotating speed of the inner fan is, the faster the acceleration of the outer fan is, and the acceleration of the outer fan at the acceleration stage is calculated by the control system of the air conditioner according to the second fitting formula;
s400, calculating the frequency-rising speed of the compressor in the frequency-rising stage according to a third fitting formula, wherein if the third fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the frequency-rising speed of the compressor, and the rotating speed of the inner fan is in direct proportion to the frequency-rising speed of the compressor, the higher the rotating speed of the inner fan is, the higher the frequency-rising speed of the compressor is, and the higher the frequency-rising speed of the compressor is, and the control system of the air conditioner calculates the frequency-rising speed of the compressor in the frequency-rising stage according to the third fitting formula;
s500, controlling the electronic expansion valve to close to a target opening according to a valve closing speed, preferably, controlling the target opening to be a reference opening of the electronic expansion valve, and after calculating the valve closing speed of the electronic expansion valve, controlling the expansion valve to close to the reference opening according to the valve closing speed by the control system of the air conditioner;
s600, controlling the outer fan to increase to a target rotating speed according to the acceleration while, before or after the electronic expansion valve is closed to a target opening degree, preferably, controlling the target rotating speed to be the maximum rotating speed of the outer fan, and controlling the outer fan to increase to the maximum rotating speed according to the acceleration while the electronic expansion valve starts to be closed by a control system of the air conditioner;
s700, when the expansion valve and/or the outer fan reach set conditions, controlling the compressor to perform frequency raising according to the frequency raising speed, preferably, when the opening degree of the expansion valve reaches a reference opening degree and the rotating speed of the outer fan reaches the maximum rotating speed, controlling the compressor to perform continuous frequency raising according to the frequency raising speed or perform continuous frequency raising in stages by the control system of the air conditioner;
s800, judging whether the frequency of the compressor reaches a stable working frequency, for example, a control system of the air conditioner acquires the current frequency of the compressor in real time and compares the current frequency with the stable working frequency;
and S900, when the frequency of the compressor reaches the stable working frequency, stopping the frequency increasing of the compressor, and if the current frequency reaches the stable working frequency, controlling the compressor to keep the stable working frequency to continuously work by the control system.
The method comprises the steps of determining a first fitting formula, a second fitting formula and a third fitting formula in advance, calculating the valve closing speed of the electronic expansion valve, the acceleration of the outer fan and the frequency increasing speed of the compressor in the frequency increasing stage according to the first fitting formula, the second fitting formula and the third fitting formula, further controlling the electronic expansion valve to close the valve to a target opening according to the valve closing speed, controlling the outer fan to increase to a target rotating speed according to the acceleration, and controlling the compressor to increase the frequency according to the frequency increasing speed while the electronic expansion valve is closed to the target opening and the outer fan increases to the target rotating speed. In other words, the method and the device solve the problems of poor universality and poor user experience of the conventional air conditioner starting control method, improve the comfort of the air conditioner and improve the user experience.
The principles of the present invention are further explained with reference to fig. 2, 3 and 4. Fig. 2 is a graph showing a valve closing speed of an expansion valve in the start-up control method of the air conditioner of the present invention, and fig. 3 is a graph showing an acceleration of an external fan in the start-up control method of the air conditioner of the present invention; fig. 4 is a graph illustrating an increasing frequency speed of a compressor in the method for controlling a start-up of an air conditioner according to the present invention.
In one possible embodiment, as shown in fig. 2, the rotation speed of the inner fan in the first fitting formula is in direct proportion to the closing speed of the expansion valve, and preferably, the target opening degree is a reference opening degree of the expansion valve. For example, a first fit of the closing valve speedThe formula may be: v. ofp＝k”rn+ b ", wherein vpIndicates the closing speed of the expansion valve (P/s, where P is the opening degree unit "step") rnRepresenting the rotating speed (r/min) of the inner fan, k 'is a proportionality coefficient, and b' is a constant. The proportionality coefficient k "and the constant b" of the first fitting equation may be determined as follows: the wind speed of the air conditioner is assumed to be five from low to high, and the corresponding rotating speeds of the fans in the ground are rn1＝500r/min、rn2＝700r/min、rn3＝900r/min、rn4＝1200r/min、rn51500r/min, thereby, let rn1When the speed is 500r/min, the valve closing speed vp1＝30P/s，rn5When the speed is 1500r/min, the valve closing speed vp5At 80P/s, k ″ -0.05 and b ″ -5 are determined, so that v isp＝0.05rn+5. After the first fitting formula is calculated, the first fitting formula is preset in a control system of the air conditioner, so that after a user starts the air conditioner to select a mode and an air speed each time, the control system can determine the valve closing speed of the expansion valve and control the expansion valve to close according to the valve closing speed.
In one possible embodiment, as shown in fig. 3, the rotation speed of the inner fan in the second fitting formula is in a direct proportion relation with the acceleration of the outer fan, and preferably, the target rotation speed is the maximum rotation speed of the outer fan. For example, the second fitting equation for acceleration may be: a isw＝k’rn+ b', wherein, awIndicating the acceleration (r/s) of the outer fan2)，rnRepresenting the rotating speed (r/min) of the inner fan, k 'is a proportionality coefficient, and b' is a constant. The proportionality coefficient k 'and the constant b' of the second fitting equation may be determined as follows: the wind speed of the air conditioner is assumed to be five from low to high, and the corresponding rotating speeds of the fans in the ground are rn1＝500r/min、rn2＝700r/min、rn3＝900r/min、rn4＝1200r/min、rn51500r/min, thereby, let rn1At 500r/min, acceleration aw1＝10P/s，rn5At 1500r/min, acceleration aw530P/s, k 'is 0.02 and b' is 0, so aw＝0.02rn. After the second fitting formula is calculated, the second fitting formula is preset in a control system of the air conditioner, so that after a user starts the air conditioner to select a mode and a wind speed each time, the control system can determine the acceleration of the outer fan and control the outer fan to work at an increased speed according to the acceleration.
In one possible embodiment, as shown in fig. 4, the compressor has only one frequency increasing stage, and the third fitting formula of the frequency increasing stage has the rotation speed of the inner fan in direct proportion to the frequency increasing speed of the compressor, and preferably, the frequency increasing speed is any value from 0.5Hz to 30 Hz. For example, the third fitting equation for the up-conversion speed may be: v. ofy＝krn+ b, wherein, vyRepresenting the up-conversion speed (Hz/s), r, of the compressornRepresenting the rotating speed (r/min) of the inner fan, k is a proportionality coefficient, and b is a constant. The scaling factor and constant of the third fitting equation may be determined as follows: the wind speed of the air conditioner is assumed to be five from low to high, and the corresponding rotating speeds of the fans in the ground are rn1＝500r/min、rn2＝700r/min、rn3＝900r/min、rn4＝1200r/min、rn51500r/min, thereby, let rn1When the frequency is 500r/min, the frequency raising speed vy1＝0.5Hz/s，rn5When the frequency is 1500r/min, the frequency raising speed vy530Hz/s, k is 0.0295 and b is-14.25, so that v isy＝0.0295rn-14.25. After the third fitting formula is calculated, the third fitting formula is preset in a control system of the air conditioner, so that after a user starts the air conditioner to select a mode and an air speed each time, the control system can determine the frequency increasing speed of the compressor and control the frequency increasing operation of the compressor according to the frequency increasing speed.
Referring now to table 1, in one possible embodiment, the stable operating frequency may be determined based on a correspondence between the outdoor ambient temperature and the stable operating frequency.
TABLE 1 stable working frequency comparison table
Figure GDA0002526717710000091
Wherein, TaoRepresenting the outdoor ambient temperature, fwRepresenting the stable operating frequency of the compressor, feRepresenting the nominal operating frequency of the compressor.
In a possible embodiment, to better improve the experience of the user in using the air conditioner, improve the refrigeration effect, improve the working stability and the service life of the compressor, after the step of controlling the electronic expansion valve to close the valve to the target opening according to the valve closing speed, the start-up control method further includes:
and adjusting the opening degree of the electronic expansion valve according to the target exhaust temperature of the compressor.
Referring to table 2 below, in a possible implementation manner, in order to better improve the experience of the user in using the air conditioner, improve the refrigeration effect, and improve the working stability and the service life of the compressor, after the step of controlling the outer fan to increase the speed to the target speed according to the acceleration, the start-up control method further includes:
and adjusting the rotating speed of the outer fan according to the corresponding relation between the outdoor environment temperature and the rotating speed of the outer fan.
TABLE 2 outer fan speed control table (1)
Tao(℃) ≤22 22-29 ≥29
rw(r/min) 400 800 1200
Wherein, TaoRepresents the outdoor ambient temperature, rwRepresenting the rotational speed of the outer fan.
Through the control mode, the starting control method of the air conditioner has the advantages that: the method comprises the steps of determining a first fitting formula, a second fitting formula and a third fitting formula in advance, calculating the valve closing speed of an expansion valve in a valve closing stage according to the first fitting formula, calculating the acceleration of an outer fan in an acceleration stage according to the second fitting formula, calculating the frequency increasing speed of a compressor in a frequency increasing stage according to the third fitting formula, further controlling the expansion valve to close the valve to a reference opening degree according to the valve closing speed, controlling the outer fan to increase to the maximum rotating speed according to the acceleration, and controlling the compressor to increase the frequency according to the frequency increasing speed when the electronic expansion valve is closed to the reference opening degree and the outer fan increases to the maximum rotating speed.
Specifically, the rotation speed of the inner fan is in direct proportion to the closing speed of the expansion valve, the acceleration of the outer fan and the rising speed of the compressor. When the rotating speed of the inner fan is low, the user is not strong in the desire of controlling the air conditioner to carry out rapid refrigeration, at the moment, the valve closing speed of the expansion valve, the acceleration of the outer fan and the frequency raising speed of the compressor which are calculated according to the first fitting formula, the second fitting formula and the third fitting formula are relatively low, the expansion valve is closed to the reference opening degree according to the valve closing speed, and when the outer fan raises to the maximum rotating speed according to the acceleration, the compressor raises the frequency according to the frequency raising speed, so that the refrigeration effect of the air conditioner can be guaranteed, and meanwhile, the operation stability and the operation noise of the expansion valve, the outer fan and the compressor are improved; when the rotating speed of the inner fan is high, it is indicated that a user urgently needs the air conditioner to perform rapid refrigeration at the moment, the valve closing speed of the expansion valve, the acceleration of the outer fan and the frequency rising speed of the compressor which are calculated according to the first fitting formula, the second fitting formula and the third fitting formula are relatively high, when the expansion valve is quickly closed to the reference opening degree according to the valve closing speed and the outer fan is quickly raised to the maximum rotating speed according to the acceleration, the compressor is quickly raised according to the frequency rising speed, so that the rapid refrigeration of the air conditioner can be realized, the refrigeration time is greatly shortened, and good use experience is brought to the user.
The opening degree of the expansion valve is reduced to the reference opening degree before the compressor is started, the opening degree of the expansion valve can be matched with the compressor when the compressor is started, the situation that the opening degree of the expansion valve is not well matched with the compressor due to the fact that the expansion valve is started together with the compressor is avoided, and the refrigerating effect after the compressor is started is further improved. The outer fan is controlled to be accelerated to the target rotating speed before the compressor is started, namely, the air is driven to flow at a high rotating speed in advance to be used for heat dissipation of the compressor and the outdoor unit, so that the compressor has a good heat dissipation condition when being started, the situation that the heat dissipation effect of the compressor is poor due to the fact that the outer fan is started along with the compressor is avoided, and the refrigeration effect after the compressor is started is further improved. The starting control method can also provide a matched running environment for the compressor when the compressor works, further improve the working efficiency and working stability of the compressor and improve the running effect of the air conditioner.
Further, repeated experiments, observation, analysis and comparison of the inventor show that the frequency raising speed of the compressor can be stably controlled to be 0.5-30Hz/s on the premise of ensuring the stable operation of the compressor by accurately controlling the oil output of the compressor, the opening degree of the electronic expansion valve, the rotating speed of the outer fan, the oil-liquid separator and the like, and particularly the maximum frequency raising speed can reach astonishing 30 Hz/s. Those skilled in the art will appreciate that the prior art compressors typically have a frequency up-conversion rate of 0.5 to 1Hz/s, and that few compressors achieve the frequency up-conversion rate of the present invention while maintaining stable operation. Therefore, when the air conditioner performs quick refrigeration, the frequency increasing speed of the air conditioner can be increased by multiple times or even tens of times compared with the prior art, so that the frequency jump of the air conditioner is realized, and the use experience of a user is greatly improved.
Of course, the above embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art may also make any type of adjustment on the above parameters without departing from the principle of the present invention, as long as the adjusted technical solution can improve the frequency raising speed on the premise of ensuring normal oil return of the compressor. For example, the forms of the first fitting formula, the second fitting formula and the third fitting formula and the parameters of the air conditioner may be adjusted based on different application scenarios, for example, the third fitting formula may also be vy＝krn 2+ b, the air speed of the air conditioner can be 4 or 6, the rotating speed of the inner fan corresponding to the lowest air speed can be 400r/min or 600r/min, and the rotating speed of the inner fan corresponding to the highest air speed can be 1400r/min or 1600 r/min.
For another example, the target opening degree may be another opening degree of the electronic expansion valve or an opening degree value near the reference opening degree, and correspondingly, when the target opening degree is smaller than the reference opening degree, the compressor may start the frequency increase after the electronic expansion valve reaches the target opening degree, and when the target opening degree value is larger than the reference opening degree, the compressor may start the frequency increase before the electronic expansion valve reaches the target opening degree. For another example, the target rotation speed may also be another rotation speed of the external fan or an opening value near the maximum rotation speed, and correspondingly, when the target rotation speed is less than the maximum rotation speed, the compressor may start up frequency boost after the external fan reaches the target rotation speed, and when the target rotation speed is greater than the maximum rotation speed, the compressor may start up frequency boost before the external fan reaches the target rotation speed. For another example, after the electronic expansion valve reaches the reference opening degree, the electronic expansion valve may be adjusted according to the outdoor environment temperature and/or the corresponding relationship between the frequency of the compressor and the opening degree of the electronic expansion valve, and the rotation speed of the external fan may be adjusted according to the corresponding relationship between the outdoor environment temperature and the frequency of the compressor and the rotation speed of the external fan (see table 3 below).
TABLE 3 outer fan speed control table (2)
Figure GDA0002526717710000121
Wherein, TaoRepresenting the outdoor ambient temperature, f representing the operating frequency of the compressor, rwRepresenting the rotational speed of the outer fan.
In addition, in order to further improve the cooling effect of the air conditioner, the frequency raising stage of the compressor may be further subdivided into a plurality of frequency raising sub-stages, and correspondingly, each frequency raising sub-stage includes a third fitting sub-formula, and the third fitting sub-formulas may only have different coefficients or may have different formulas. For example, the frequency increasing stage of the compressor may include three frequency increasing sub-stages, and each frequency increasing sub-stage corresponds to a third fitting sub-formula of vy1＝k1rn+b1、vy2＝k2rn+b2、vy3＝k3rn+b3. After the user determines the wind speed, the control system respectively calculates the frequency raising speed of each frequency raising sub-stage of the corresponding compressor according to each third fitting sub-formula, and then controls the compressor to sequentially raise the frequency according to the frequency raising speed of each frequency raising sub-stage. If the relationship of the frequency raising speeds of the three frequency raising sub-stages is calculated as vy1>vy2>vy3(of course, the relationship may be other such as vy1<vy2<vy3Etc.), then through controlling the compressor with the mode that the speed of rising frequency reduces gradually, when realizing the quick refrigeration of air conditioner, guarantee that the compressor oil return is normal, reduce the process noise gradually, increase of service life.
The following briefly introduces a working flow of an air conditioner applying the startup control method of the present invention with reference to fig. 1 to 4. The working process of the air conditioner can be as follows:
air conditioner start-up → selection of refrigeration mode and setting of wind speed to maximum speed → calculation of valve closing speed v of expansion valve according to first fitting formulapCalculating the acceleration a of the outer fan according to a second fitting formulawCalculating the raising frequency speed v of the compressor according to a third fitting formulayWhile determining a stable operating frequency f from Table 1w→ electronic expansion valve pressBy closing the valve speed vpWhen the valve is closed quickly, the external fan is driven according to the acceleration awFast speed raising → electronic expansion valve closing to standard opening and outer fan raising speed to maximum speed, compressor raising speed v according to raising frequency speedyPerforming fast frequency raising → after a period of time the compressor reaches stable working frequency fwThen the frequency is maintained, the opening degree B of the electronic expansion valve is adjusted according to the target exhaust temperature of the compressor, and the rotating speed r of the external fanwAdjusted according to table 3.
Finally, although the embodiment is described by taking a cooling mode as an example, it is obvious that such an application scenario is not constant, and those skilled in the art may also apply the power-on control method of the present invention to other modes of an air conditioner, such as a heating mode or a dehumidifying mode of an air conditioner, without departing from the principle of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (8)

1. A starting control method of an air conditioner comprises a compressor, an expansion valve, an outer fan and an inner fan, and is characterized in that the starting control method comprises the following steps:
after the air conditioner is started and an operation mode and an operation wind speed instruction are received, acquiring the rotating speed of the inner fan;
calculating the valve closing speed of the expansion valve according to a first fitting formula;
calculating the acceleration of the outer fan according to a second fitting formula;
calculating the frequency increasing speed of the compressor in the frequency increasing stage according to a third fitting formula;
controlling the expansion valve to close the valve to a target opening degree according to the valve closing speed;
controlling the outer fan to increase to a target rotating speed according to the acceleration while the expansion valve closes to the target opening according to the valve closing speed;
when the expansion valve and/or the outer fan reach set conditions, controlling the compressor to perform frequency boosting according to the frequency boosting speed;
the first fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the valve closing speed of the expansion valve, and the rotating speed of the inner fan is in direct proportion to the valve closing speed of the expansion valve; the second fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the acceleration of the outer fan, and the rotating speed of the inner fan and the acceleration of the outer fan are in a direct proportion relation; the third fitting formula is determined according to the corresponding relation between the rotating speed of the inner fan and the frequency rising speed of the compressor, and the rotating speed of the inner fan and the frequency rising speed of the compressor are in a direct proportion relation;
the step of controlling the compressor to perform frequency boosting according to the frequency boosting speed when the expansion valve and/or the outer fan reach a set condition further includes:
when the opening degree of the expansion valve reaches the reference opening degree and the rotating speed of the outer fan reaches the maximum rotating speed, controlling the compressor to perform frequency boosting according to the frequency boosting speed;
the first fitting equation is:
vp＝k”rn+b”
wherein v ispIndicating the closing speed, r, of the expansion valvenRepresenting the rotating speed of the inner fan, k 'is a proportionality coefficient, and b' is a constant;
the second fitting equation is:
aw＝k’rn+b’
wherein, awRepresenting said external fanAcceleration, rnRepresenting the rotating speed of the inner fan, k 'is a proportionality coefficient, and b' is a constant;
the third fitting equation is:
vy＝krn+b
wherein v isyIndicating the up-conversion speed, r, of the compressornRepresenting the rotating speed of the inner fan, k is a proportionality coefficient, and b is a constant.
2. The startup control method of an air conditioner according to claim 1, further comprising:
judging whether the frequency of the compressor reaches a stable working frequency or not;
and when the frequency of the compressor reaches the stable working frequency, controlling the compressor to stop increasing the frequency.
3. A start-up control method of an air conditioner according to claim 2, wherein the stable operating frequency is determined according to a correspondence between an outdoor ambient temperature and the stable operating frequency.
4. The start-up control method of an air conditioner according to claim 1, wherein after the step of controlling the expansion valve to close the valve to a target opening degree at the valve closing speed, the start-up control method further comprises:
and adjusting the opening degree of the expansion valve according to the target exhaust temperature of the compressor.
5. The startup control method of an air conditioner according to claim 1, wherein after the step of "controlling the outer fan to increase in speed to a target rotation speed in accordance with the acceleration", the startup control method further comprises:
and adjusting the rotating speed of the outer fan according to the corresponding relation between the outdoor environment temperature and/or the frequency of the compressor and the rotating speed of the outer fan.
6. A start-up control method of an air conditioner according to any one of claims 1 to 5, wherein the frequency-up stage comprises a plurality of frequency-up sub-stages, the third fitting formula correspondingly comprises a plurality of third fitting sub-formulas, and calculating the frequency-up speed of the compressor in the frequency-up stage according to the third fitting formula further comprises:
and respectively calculating the frequency increasing speed of each frequency increasing sub-stage of the compressor according to each third fitting sub-formula.
7. The method for controlling the start-up of an air conditioner according to claim 6, wherein the step of controlling the compressor to perform the frequency up-conversion in accordance with the frequency up-conversion speed further comprises:
and controlling the compressor to continuously increase the frequency according to the frequency increasing speed of each frequency increasing sub-stage.
8. The method of claim 1, wherein the up-conversion speed is any value of 0.5Hz to 30 Hz.
CN201810277318.2A 2018-03-31 2018-03-31 Starting control method of air conditioner Active CN108361934B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810277318.2A CN108361934B (en) 2018-03-31 2018-03-31 Starting control method of air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810277318.2A CN108361934B (en) 2018-03-31 2018-03-31 Starting control method of air conditioner

Publications (2)

Publication Number Publication Date
CN108361934A CN108361934A (en) 2018-08-03
CN108361934B true CN108361934B (en) 2021-09-21

Family

ID=63001510

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810277318.2A Active CN108361934B (en) 2018-03-31 2018-03-31 Starting control method of air conditioner

Country Status (1)

Country Link
CN (1) CN108361934B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109654653B (en) * 2018-11-26 2020-04-28 珠海格力电器股份有限公司 Control method and device for frequency adjustment of multi-connected air conditioning unit and air conditioner
CN113251622B (en) * 2021-04-25 2022-12-23 青岛海尔空调器有限总公司 Control method of sleep mode

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09310902A (en) * 1996-05-23 1997-12-02 Fujitsu General Ltd Control method of air conditioner
CN101446434B (en) * 2007-11-27 2011-05-25 台湾得意温控科技股份有限公司 Driving module of a DC motor and fan coil therewith
CN103940038B (en) * 2014-04-03 2016-09-28 广东美的集团芜湖制冷设备有限公司 The defrosting control method of air-conditioner
CN104266305B (en) * 2014-09-02 2017-02-22 广东美的集团芜湖制冷设备有限公司 Variable-frequency air conditioner control device and method and variable-frequency air conditioner
CN104314796A (en) * 2014-10-21 2015-01-28 芜湖美智空调设备有限公司 Compressor frequency controlling method, compressor frequency controlling device and air conditioner
CN107677005B (en) * 2017-09-22 2020-05-29 青岛海尔空调器有限总公司 Control method and system of air conditioner under low-temperature heating working condition
CN107702280B (en) * 2017-09-22 2020-08-25 青岛海尔空调器有限总公司 Control method and system of air conditioner in refrigeration mode

Also Published As

Publication number Publication date
CN108361934A (en) 2018-08-03

Similar Documents

Publication Publication Date Title
CN107702280B (en) Control method and system of air conditioner in refrigeration mode
CN108534322B (en) Starting control method of air conditioner
CN107631443B (en) Control method and system of air conditioner under low-humidity heating working condition
CN107576016B (en) Control method and system of air conditioner
CN108548269B (en) Control method of air conditioner
CN107677005B (en) Control method and system of air conditioner under low-temperature heating working condition
CN108758998B (en) Control method of air conditioner
CN106839341B (en) Air conditioner mute control method
CN108548304B (en) Control method of air conditioner
CN107726558B (en) Control method and system of air conditioner under high-humidity heating working condition
CN113739344B (en) Control method of internal expansion valve, air conditioner and computer readable storage medium
CN107606835B (en) Control method and system of air conditioner in refrigeration mode
CN108548301B (en) Starting control method of air conditioner
CN110068119B (en) Dynamic frequency conversion method and device for air conditioner compressor
CN107576029B (en) Control method and system of air conditioner under low-temperature low-humidity heating working condition
CN113531801B (en) Control method and device of multi-connected air conditioner and readable storage medium
CN107192085B (en) Air conditioner refrigeration operation control method
CN110057050B (en) Control method of air conditioner in refrigeration mode
CN108361934B (en) Starting control method of air conditioner
CN108548288A (en) The control method of air-conditioning
CN108548289A (en) The control method of air-conditioning
CN107655247B (en) Control method and system of air conditioner in refrigeration mode
CN111023523A (en) Air conditioner control method and device, air conditioner and storage medium
CN107631438B (en) Control method and system of air conditioner under high-humidity heating working condition
CN107726557B (en) Control method and system of air conditioner under low-temperature high-humidity heating working condition

Legal Events

Date Code Title Description
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20210813

Address after: No.1 Gangcheng South Road, Jiangbei District, Chongqing, 400026

Applicant after: CHONGQING HAIER AIR-CONDITIONER Co.,Ltd.

Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.

Applicant after: Haier Smart Home Co., Ltd.

Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao

Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.

GR01 Patent grant
GR01 Patent grant