CN104879881A - Constant-frequency air conditioner and control method and unit thereof - Google Patents

Constant-frequency air conditioner and control method and unit thereof Download PDF

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Publication number
CN104879881A
CN104879881A CN201510214564.XA CN201510214564A CN104879881A CN 104879881 A CN104879881 A CN 104879881A CN 201510214564 A CN201510214564 A CN 201510214564A CN 104879881 A CN104879881 A CN 104879881A
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China
Prior art keywords
temperature value
expansion valve
air
conditioner
fixed frequency
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Granted
Application number
CN201510214564.XA
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Chinese (zh)
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CN104879881B (en
Inventor
江悄悄
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.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201510214564.XA priority Critical patent/CN104879881B/en
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Publication of CN104879881B publication Critical patent/CN104879881B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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

Abstract

The invention provides a constant-frequency air conditioner and a control method and unit thereof. The control method includes: acquiring current indoor temperature and current outdoor temperature; comparing the current indoor temperature to set temperature of the constant-frequency air conditioner; and if the current indoor temperature is lower than or equal to the set temperature, adjusting flow of coolant of the constant-frequency air conditioner through electronic expansion valves according to the current outdoor temperature and the set temperature. The electronic expansion valves are disposed on connecting pipes directly used for gas returning of the compressor and arranged at two ends of a compressor of the constant-frequency air conditioner and are used for adjusting the flow of the coolant. The influence of shutdown at satisfied temperature upon fluctuation of room temperature and upon life of the compressor can be avoided, and comfortable functional auto-control is achieved for the constant-frequency air conditioner.

Description

A kind of control method of air-conditioner with fixed frequency, controller and air-conditioner with fixed frequency
Technical field
The present invention relates to air conditioner controlling technology field, particularly relate to a kind of control method of air-conditioner with fixed frequency, controller and air-conditioner with fixed frequency.
Background technology
The mode of air-conditioner with fixed frequency control temperature nearly all in the market reaches temperature to shut down, and namely indoor environment temperature reaches remote control setting temperature space-time mediation machine.
But; reach temperature frequently and shut down the comfortableness that greatly can reduce room to the fluctuation of indoor environment temperature and the discontinuity of air-conditioner sound; on the other hand, reach temperature frequently and shut down and effectively can not realize energy saving, but also can make a big impact to the compressor life-span.
Therefore, how to provide a kind of can stability contorting room temperature and significant without the control method of the fixed frequency air conditioner of frequent shutdown, controller and air-conditioner with fixed frequency.
Summary of the invention
In view of the above problems, the present invention is proposed to provide a kind of control method of air-conditioner with fixed frequency, controller and the air-conditioner with fixed frequency that overcome the problems referred to above or solve or slow down the problems referred to above at least in part.
According to an aspect of the present invention, provide a kind of control method of air-conditioner with fixed frequency, described method comprises:
Obtain current indoor temperature value and current outdoor temperature value;
The set temperature value of described current indoor temperature value and air-conditioner with fixed frequency is compared;
When described current indoor temperature value is less than or equal to described set temperature value, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Described electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
Optionally, describedly adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve, comprising:
Adjust the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
Optionally, the described aperture adjusting electric expansion valve according to described current outdoor temperature value and described set temperature value, comprising:
According to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
According to described first refrigerating capacity, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Described current outdoor temperature value Tx is mated with described mapping table;
If described mapping table comprises: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T1 > Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
Optionally, before described acquisition current indoor temperature value and current outdoor temperature value, described method also comprises:
Set up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Set up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening.
According to another aspect of the present invention, provide a kind of controller of air-conditioner with fixed frequency, described controller comprises:
Acquiring unit, for obtaining current indoor temperature value and current outdoor temperature value;
Comparing unit, the set temperature value for the current indoor temperature value that described acquiring unit obtained and air-conditioner with fixed frequency compares;
Control unit, for at the comparative result of described comparing unit be current indoor temperature value be less than or equal to described set temperature value time, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Described electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
Optionally, described control unit, for adjusting the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realizes the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
Optionally, described control unit comprises:
Refrigerating capacity regulates subelement, for according to the refrigeration relation table set up in advance, determines the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
Chooser unit, for according to described first refrigerating capacity, selects the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Coupling subelement, for mating described current outdoor temperature value Tx with described mapping table;
Control subelement, if comprise for described mapping table: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T 1> Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
Optionally, described controller also comprises:
Refrigeration relation table sets up unit, before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, sets up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Mapping table sets up unit, before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, sets up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening.
According to a further aspect of the invention, provide a kind of air-conditioner with fixed frequency, comprising:
Temperature sensor, compressor, arrange at described compressor two ends for directly carry out compressor return air tube connector, be arranged on electric expansion valve on described tube connector and above-mentioned arbitrary described controller;
Described temperature sensor detects current indoor temperature value and current outdoor temperature value, and the current indoor temperature value of detection and current outdoor temperature value are sent to described controller;
Described controller obtains described current indoor temperature value and current outdoor temperature value, when judging that described current indoor temperature value is less than or equal to default set temperature value, adjust the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize controlling the cold medium flux in described compressor.
Optionally, described temperature sensor is temperature value and outdoor temp angle value in sensing chamber regularly or periodically, and the up-to-date Indoor Temperature angle value detected and outdoor temp angle value are sent to described controller as current indoor temperature value and current outdoor temperature value.
Beneficial effect of the present invention is:
The control method of air-conditioner with fixed frequency provided by the invention, controller and air-conditioner with fixed frequency; the tube connector directly carrying out compressor return air arranged at the compressor two ends of air-conditioner with fixed frequency, the electric expansion valve be arranged on described tube connector; the cold medium flux of described compressor is controlled by the aperture controlling described electric expansion valve; and then can avoid reaching temperature shutdown frequently to the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred embodiment, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the flow chart of the control method of a kind of air-conditioner with fixed frequency that the embodiment of the present invention proposes;
Fig. 2 is the structured flowchart of the controller of a kind of air-conditioner with fixed frequency that the embodiment of the present invention proposes;
Fig. 3 is the fundamental diagram of a kind of air-conditioner with fixed frequency that the embodiment of the present invention proposes.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in description of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology), have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary, should be understood to that there is the meaning consistent with the meaning in the context of prior art, unless and by specific definitions, otherwise can not explain by idealized or too formal implication.
The present invention arranges by the compressor two ends at described air-conditioner with fixed frequency the tube connector directly carrying out compressor return air; and electric expansion valve is set on described tube connector; cold medium flux is controlled by the aperture controlling described electric expansion valve; and then can avoid reaching temperature shutdown frequently to the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner thus realize the energy-conservation comfortable function of fixed frequency air conditioner.
Fig. 1 shows the flow chart of the control method of a kind of air-conditioner with fixed frequency of the embodiment of the present invention.
With reference to Fig. 1, the control method of the air-conditioner with fixed frequency that the embodiment of the present invention proposes comprises:
S1, acquisition current indoor temperature value and current outdoor temperature value;
S2, the set temperature value of described current indoor temperature value and air-conditioner with fixed frequency to be compared;
S3, when described current indoor temperature value is less than or equal to described set temperature value, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Wherein, electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
The embodiment of the present invention carries out the detection of Indoor Temperature angle value Ti and outdoor temp angle value Tx according to preset time period, and obtaining current indoor temperature value Ti and current outdoor temperature value Tx, the operation carrying out air-conditioner with fixed frequency according to the magnitude relationship of the set temperature value Ts of described Indoor Temperature angle value Ti and air-conditioner with fixed frequency remote controller controls.When Indoor Temperature angle value Ti is less than or equal to air-conditioning set temperature value Ts, then adjusted the cold medium flux of described air-conditioner with fixed frequency by electric expansion valve according to described air-conditioning set temperature value Ts and described outdoor temp angle value Tx.When Indoor Temperature angle value Ti is greater than air-conditioning set temperature value Ts, then close described electric expansion valve, Lx=0, keep the normal operation of air-conditioner with fixed frequency.
In the embodiment of the present invention, describedly adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve, comprising:
Adjust the aperture Lx of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
Further, the described aperture adjusting electric expansion valve according to described current outdoor temperature value and described set temperature value, comprising:
According to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Wherein, described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
According to described first refrigerating capacity, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Described current outdoor temperature value Tx is mated with described mapping table;
If described mapping table comprises: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T1 > Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
Under the refrigerating capacity that air-conditioner with fixed frequency is different, outdoor temp angle value is different from the corresponding relation of electronic expansion valve opening, need according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, under the current refrigeration ability of air-conditioner with fixed frequency, determine that first presets outdoor temp angle value T respectively 1, second preset outdoor temp angle value T 2and the 3rd presets outdoor temp angle value T 3corresponding electronic expansion valve opening Lx (T 1), Lx (T 2) and Lx (T 3), wherein, T 1>T 2>T 3, and then described current outdoor temperature value Tx is mated with described mapping table, realize the control of electronic expansion valve opening Lx.
In the embodiment of the present invention, before described acquisition current indoor temperature value and current outdoor temperature value, described method also comprises:
Set up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Set up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening, described outdoor temp angle value is the outdoor temp angle value that user sets.
Carry out the detection of Indoor Temperature angle value and outdoor temp angle value by arranging indoor temperature test point and indoor temperature test point in the embodiment of the present invention, the every preset time period of all detected temperatures points is detected once, change according to described Indoor Temperature angle value and outdoor temp angle value adjusts described electronic expansion valve opening, and the every preset time period of electronic expansion valve opening upgrades once.Preset time period can be set to 30S.
Will be understood that, preset time period can be set to 30S, and can carry out other according to the actual requirements yet and arrange, the present invention does not do concrete restriction to this.
Below by specific embodiment, clearly explanation is explained to the present invention.
Setting: T1: indoor environment temperature, Ts: remote controller design temperature, Tx: outdoor environment temperature, Lx: electronic expansion valve opening, W: air-conditioner rated capacity, Q: air-conditioner practical capacity;
First, the magnitude relationship of the air-conditioning set temperature value Ts of Indoor Temperature angle value Ti and air-conditioner with fixed frequency remote controller is judged;
When Indoor Temperature angle value Ti is greater than air-conditioning set temperature value Ts, then close described electric expansion valve, Lx=0, keep the normal operation of air-conditioner with fixed frequency.
When Indoor Temperature angle value Ti is less than or equal to air-conditioning set temperature value Ts, then adjust described electronic expansion valve opening Lx according to described air-conditioning set temperature value Ts and described outdoor temp angle value Tx.
The default span [17 DEG C of the design temperature of air-conditioner with fixed frequency in the embodiment of the present invention, 30 DEG C], temperature range is obtained: [17 DEG C after carrying out temperature range division, 18 DEG C], [19 DEG C, 21 DEG C], [22 DEG C, 24 DEG C], [25 DEG C, 27 DEG C], [28 DEG C, 30 DEG C], control flow corresponding to each temperature range specifically comprises:
(a) Ts=17/18 DEG C, adjustment electronic expansion valve opening Lx, according to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, specifically comprise: the actual refrigerating capacity Q=air-conditioner rated capacity W*a% of adjustment air-conditioner, a is the preset control parameters of the refrigerating capacity of air-conditioner, is preferably 78≤a≤82, gets a definite value;
T 1, T 2and T 3be respectively 40 DEG C, 30 DEG C, 20 DEG C, according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, draw current Lx (40 DEG C), Lx (30 DEG C), Lx (20 DEG C);
Tx >=40 DEG C, electronic expansion valve opening Lx=Lx (40 DEG C);
40 DEG C of > Tx >=30 DEG C, electronic expansion valve opening Lx=(Lx (30 DEG C)-Lx (40 DEG C)) * (40-Tx)/10+Lx (40 DEG C);
30 DEG C of > Tx >=20 DEG C, electronic expansion valve opening Lx=(Lx (20 DEG C)-Lx (30 DEG C)) * (30-Tx)/10+Lx (30 DEG C);
Tx<20 DEG C, electronic expansion valve opening Lx=Lx (20 DEG C);
Wherein, T1≤Ts-1 DEG C, Lx (i+1)=Lx (i)+2;
(b) Ts=19/20/21 DEG C, adjustment electronic expansion valve opening Lx, according to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, specifically comprise: the actual refrigerating capacity Q=W*a% of adjustment air-conditioner, a is the preset control parameters of the refrigerating capacity of air-conditioner, is preferably 68≤a≤72, gets a definite value;
T 1, T 2and T 3be respectively 40 DEG C, 30 DEG C, 20 DEG C, according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, draw current Lx (40 DEG C), Lx (30 DEG C), Lx (20 DEG C);
Tx >=40 DEG C, electronic expansion valve opening Lx=Lx (40 DEG C);
40 DEG C of > Tx >=30 DEG C, electronic expansion valve opening Lx=(Lx (30 DEG C)-Lx (40 DEG C)) * (40-Tx)/10+Lx (40 DEG C);
30 DEG C of > Tx >=20 DEG C, electronic expansion valve opening Lx=(Lx (20 DEG C)-Lx (30 DEG C)) * (30-Tx)/10+Lx (30 DEG C);
Tx<20 DEG C, electronic expansion valve opening Lx=Lx (20 DEG C);
Wherein, T1≤Ts-1 DEG C, Lx (i+1)=Lx (i)+2;
(c) Ts=22/23/24 DEG C, adjustment electronic expansion valve opening Lx, according to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, specifically comprise: the actual refrigerating capacity Q=W*a% of adjustment air-conditioner, a is the preset control parameters of the refrigerating capacity of air-conditioner, is preferably 58≤a≤62, gets a definite value;
T 1, T 2and T 3be respectively 40 DEG C, 30 DEG C, 20 DEG C, according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, draw current Lx (40 DEG C), Lx (30 DEG C), Lx (20 DEG C);
Tx >=40 DEG C, electronic expansion valve opening Lx=Lx (40 DEG C);
40 DEG C of > Tx >=30 DEG C, electronic expansion valve opening Lx=(Lx (30 DEG C)-Lx (40 DEG C)) * (40-Tx)/10+Lx (40 DEG C);
30 DEG C of > Tx >=20 DEG C, electronic expansion valve opening Lx=(Lx (20 DEG C)-Lx (30 DEG C)) * (30-Tx)/10+Lx (30 DEG C);
Tx<20 DEG C, electronic expansion valve opening Lx=Lx (20 DEG C);
Wherein, T1≤Ts-1 DEG C, Lx (i+1)=Lx (i)+2;
(d) Ts=25/26/27 DEG C, adjustment electronic expansion valve opening Lx, according to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, specifically comprise: the actual refrigerating capacity Q=W*a% of adjustment air-conditioner, a is the preset control parameters of the refrigerating capacity of air-conditioner, is preferably 48≤a≤52, gets a definite value;
T 1, T 2and T 3be respectively 40 DEG C, 30 DEG C, 20 DEG C, according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, draw current Lx (40 DEG C), Lx (30 DEG C), Lx (20 DEG C);
Tx >=40 DEG C, electronic expansion valve opening Lx=Lx (40 DEG C);
40 DEG C of > Tx >=30 DEG C, electronic expansion valve opening Lx=(Lx (30 DEG C)-Lx (40 DEG C)) * (40-Tx)/10+Lx (40 DEG C);
30 DEG C of > Tx >=20 DEG C, electronic expansion valve opening Lx=(Lx (20 DEG C)-Lx (30 DEG C)) * (30-Tx)/10+Lx (30 DEG C);
Tx<20 DEG C, electronic expansion valve opening Lx=Lx (20 DEG C);
Wherein, T1≤Ts-1 DEG C, Lx (i+1)=Lx (i)+2;
(e) T1≤Ts=28/29/30 DEG C, adjustment electronic expansion valve opening Lx, according to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, specifically comprise: the actual refrigerating capacity Q=W*a% of adjustment air-conditioner, a is the preset control parameters of the refrigerating capacity of air-conditioner, is preferably 38≤a≤42, gets a definite value;
T 1, T 2and T 3be respectively 40 DEG C, 30 DEG C, 20 DEG C, according to current refrigeration ability, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance, draw current Lx (40 DEG C), Lx (30 DEG C), Lx (20 DEG C);
Tx >=40 DEG C, electronic expansion valve opening Lx=Lx (40 DEG C);
40 DEG C of > Tx >=30 DEG C, electronic expansion valve opening Lx=(Lx (30 DEG C)-Lx (40 DEG C)) * (40-Tx)/10+Lx (40 DEG C);
30 DEG C of > Tx >=20 DEG C, electronic expansion valve opening Lx=(Lx (20 DEG C)-Lx (30 DEG C)) * (30-Tx)/10+Lx (30 DEG C);
Tx<20 DEG C, electronic expansion valve opening Lx=Lx (20 DEG C);
Wherein, T1≤Ts-1 DEG C, Lx (i+1)=Lx (i)+2.
The embodiment of the present invention arranges at the compressor two ends of described air-conditioner with fixed frequency the tube connector directly carrying out compressor return air; and electric expansion valve is set on described tube connector; by when Indoor Temperature angle value is less than or equal to air-conditioning set temperature value; described electronic expansion valve opening is adjusted according to described air-conditioning set temperature value and described outdoor temp angle value; and then the control of cold medium flux to compressor; can avoid reaching temperature frequently to shut down the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner.
Fig. 2 shows the structured flowchart of the controller of a kind of air-conditioner with fixed frequency that another embodiment of the present invention proposes;
In the embodiment of the present invention; at the compressor two ends of described air-conditioner with fixed frequency, the tube connector directly carrying out compressor return air is set; and electric expansion valve is set on described tube connector; the aperture of controller to described electric expansion valve of a kind of air-conditioner with fixed frequency proposed by the present invention is controlled; realize the control of the cold medium flux of described compressor; and then can avoid reaching temperature shutdown frequently to the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner.
With reference to Fig. 2, the controller of the air-conditioner with fixed frequency that the embodiment of the present invention proposes comprises acquiring unit 10, comparing unit 20 and control unit 30, wherein:
Described acquiring unit 10, for obtaining current indoor temperature value and current outdoor temperature value;
Described comparing unit 20, the set temperature value for the current indoor temperature value that described acquiring unit obtained and air-conditioner with fixed frequency compares;
Described control unit 30, for at the comparative result of described comparing unit be current indoor temperature value be less than or equal to described set temperature value time, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Wherein, electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
Further, described control unit 33, for adjusting the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realizes the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
Further, described control unit 30 comprises:
Refrigerating capacity regulates subelement, for according to the refrigeration relation table set up in advance, determines the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
Chooser unit, for according to described first refrigerating capacity, selects the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Coupling subelement, for mating described current outdoor temperature value Tx with described mapping table;
Control subelement, if comprise for described mapping table: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T 1> Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
The controller of the air-conditioner with fixed frequency that the embodiment of the present invention proposes also comprises:
Refrigeration relation table sets up unit, before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, sets up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Mapping table sets up unit, and before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, set up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening, described outdoor temp angle value is the outdoor temp angle value that user sets.
Further embodiment of this invention additionally provides a kind of air-conditioner with fixed frequency, comprise temperature sensor, compressor, arrange at described compressor two ends for directly carry out compressor return air tube connector, be arranged on the electric expansion valve on described tube connector and the controller described in above-mentioned any embodiment;
Described temperature sensor detects current indoor temperature value and current outdoor temperature value, and the current indoor temperature value of detection and current outdoor temperature value are sent to described controller;
Described controller obtains described current indoor temperature value and current outdoor temperature value, when judging that described current indoor temperature value is less than or equal to default set temperature value, adjust the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize controlling the cold medium flux in described compressor.
The operation principle of described air-conditioner with fixed frequency; as shown in Figure 3; by when Indoor Temperature angle value is less than or equal to air-conditioning set temperature value; described electronic expansion valve opening is adjusted according to described air-conditioning set temperature value and described outdoor temp angle value; and then the control of cold medium flux to compressor; can avoid reaching temperature frequently to shut down the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner.
Further, described temperature sensor is temperature value and outdoor temp angle value in sensing chamber regularly or periodically, and the up-to-date Indoor Temperature angle value detected and outdoor temp angle value are sent to described controller as current indoor temperature value and current outdoor temperature value.
By temperature sensor, indoor temperature test point and indoor temperature test point are carried out to the detection of Indoor Temperature angle value and outdoor temp angle value in the embodiment of the present invention, detect once the every preset time period of all detected temperatures points, the every preset time period adjustment of corresponding electronic expansion valve opening once.Preset time period can be arranged, as 30S.
The control method of air-conditioner with fixed frequency provided by the invention, controller and air-conditioner with fixed frequency; the tube connector directly carrying out compressor return air arranged at the compressor two ends of air-conditioner with fixed frequency, the electric expansion valve be arranged on described tube connector; the cold medium flux of described compressor is controlled by the aperture controlling described electric expansion valve; and then can avoid reaching temperature shutdown frequently to the fluctuation of room temperature and the impact on the compressor life-span, realize the automatic control of the energy-conservation comfortable function of fixed frequency air conditioner.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the system in embodiment can carry out being distributed in the system of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more systems being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The above is only some embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. a control method for air-conditioner with fixed frequency, is characterized in that, described method comprises:
Obtain current indoor temperature value and current outdoor temperature value;
The set temperature value of described current indoor temperature value and air-conditioner with fixed frequency is compared;
When described current indoor temperature value is less than or equal to described set temperature value, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Described electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
2. method according to claim 1, is characterized in that, describedly adjusts the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve, comprising:
Adjust the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
3. method according to claim 2, is characterized in that, the described aperture adjusting electric expansion valve according to described current outdoor temperature value and described set temperature value, comprising:
According to the refrigeration relation table set up in advance, determine the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
According to described first refrigerating capacity, select the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Described current outdoor temperature value Tx is mated with described mapping table;
If described mapping table comprises: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T1 > Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
4. the method according to any one of claim 1-3, is characterized in that, before described acquisition current indoor temperature value and current outdoor temperature value, described method also comprises:
Set up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Set up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening.
5. a controller for air-conditioner with fixed frequency, is characterized in that, described controller comprises:
Acquiring unit, for obtaining current indoor temperature value and current outdoor temperature value;
Comparing unit, the set temperature value for the current indoor temperature value that described acquiring unit obtained and air-conditioner with fixed frequency compares;
Control unit, for at the comparative result of described comparing unit be current indoor temperature value be less than or equal to described set temperature value time, adjust the cold medium flux of described air-conditioner with fixed frequency according to described current outdoor temperature value and described set temperature value by electric expansion valve;
Described electric expansion valve is arranged on the tube connector for directly carrying out compressor return air at described air-conditioner with fixed frequency compressor two ends.
6. controller according to claim 5, is characterized in that, described control unit, for adjusting the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realizes the cold medium flux of the described air-conditioner with fixed frequency of adjustment.
7. controller according to claim 6, is characterized in that, described control unit comprises:
Refrigerating capacity regulates subelement, for according to the refrigeration relation table set up in advance, determines the refrigerating capacity that the set temperature value of current air-conditioner with fixed frequency is corresponding, using first refrigerating capacity of this refrigerating capacity as described air-conditioner with fixed frequency; Described refrigeration relation table is the corresponding relation of multiple set temperature value and refrigerating capacity;
Chooser unit, for according to described first refrigerating capacity, selects the mapping table of outdoor temp angle value and the electronic expansion valve opening set up in advance; Multiple outdoor temp angle value and electronic expansion valve opening corresponding to each outdoor temp angle value is stored in this mapping table;
Coupling subelement, for mating described current outdoor temperature value Tx with described mapping table;
Control subelement, if comprise for described mapping table: T 1, T 2, T 3, and the electronic expansion valve opening of correspondence is Lx (T 1), Lx (T 2), Lx (T 3), wherein, T 1>T 2>T 3;
Then, Tx>=T 1, adjusting described electronic expansion valve opening is Lx=Lx (T 1);
T 1> Tx>=T 2, adjusting described electronic expansion valve opening is Lx=(Lx (T 2)-Lx (T 1)) * (T 1-Tx)/10+Lx (T 1);
T 2> Tx>=T 3, adjustment electronic expansion valve opening is Lx=(Lx (T 3)-Lx (T 2)) * (T 2-Tx)/10+Lx (T 2);
Tx<T 3, adjustment electronic expansion valve opening is Lx=Lx (T 3).
8. the controller according to any one of claim 5-7, is characterized in that, described controller also comprises:
Refrigeration relation table sets up unit, before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, sets up the refrigeration relation table of the set temperature value of air-conditioner with fixed frequency and the refrigerating capacity of described air-conditioner with fixed frequency,
And/or,
Mapping table sets up unit, before obtaining current indoor temperature value and current outdoor temperature value in acquiring unit, sets up the mapping table of multiple outdoor temp angle value and electronic expansion valve opening.
9. an air-conditioner with fixed frequency, is characterized in that, comprising:
Temperature sensor, compressor, arrange at described compressor two ends for directly carry out compressor return air tube connector, be arranged on the electric expansion valve on described tube connector and the controller as described in any one of claim 5-8;
Described temperature sensor detects current indoor temperature value and current outdoor temperature value, and the current indoor temperature value of detection and current outdoor temperature value are sent to described controller;
Described controller obtains described current indoor temperature value and current outdoor temperature value, when judging that described current indoor temperature value is less than or equal to default set temperature value, adjust the aperture of described electric expansion valve according to described current outdoor temperature value and described set temperature value, realize controlling the cold medium flux in described compressor.
10. air-conditioner with fixed frequency according to claim 9, it is characterized in that, described temperature sensor is temperature value and outdoor temp angle value in sensing chamber regularly or periodically, and the up-to-date Indoor Temperature angle value detected and outdoor temp angle value are sent to described controller as current indoor temperature value and current outdoor temperature value.
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CN105222445A (en) * 2015-10-30 2016-01-06 Tcl空调器(中山)有限公司 The control method of electric expansion valve, device and air-conditioner set and control method thereof
CN105546742B (en) * 2015-12-25 2018-10-26 美的集团武汉制冷设备有限公司 The control method and device of air conditioner and air conditioner
CN105546742A (en) * 2015-12-25 2016-05-04 美的集团武汉制冷设备有限公司 Air conditioner and air conditioner control method and device
CN105650829A (en) * 2016-03-14 2016-06-08 珠海格力电器股份有限公司 Control method and device for constant-frequency air-conditioner
CN106196430A (en) * 2016-06-30 2016-12-07 珠海格力电器股份有限公司 Fixed frequency air conditioner adjusts the system and method for refrigerating capacity automatically
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CN106594987B (en) * 2016-12-02 2019-10-01 青岛海尔空调器有限总公司 Fixed frequency air conditioner halt control method
CN107676939B (en) * 2017-10-27 2021-02-26 广东志高暖通设备股份有限公司 Control method, control system and control device of fixed-frequency air conditioner
CN107676939A (en) * 2017-10-27 2018-02-09 广东志高暖通设备股份有限公司 A kind of control method of fixed frequency air conditioner, control system and control device
CN108758976A (en) * 2018-06-19 2018-11-06 广东美的制冷设备有限公司 Control method, device and the air-conditioning with it of air-conditioning
CN108800466B (en) * 2018-06-19 2021-08-20 广东美的制冷设备有限公司 Control method and device of air conditioner
CN108518821B (en) * 2018-06-19 2021-08-20 广东美的制冷设备有限公司 Control method and device of air conditioner
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CN109724203A (en) * 2018-12-29 2019-05-07 青岛海尔空调器有限总公司 Air conditioner and its control method
CN109855257A (en) * 2019-02-28 2019-06-07 宁波奥克斯电气股份有限公司 Improve control method, device, air conditioner and the storage medium of air conditioning comfortableness
CN109855257B (en) * 2019-02-28 2021-09-21 宁波奥克斯电气股份有限公司 Control method and device for improving comfort of air conditioner, air conditioner and storage medium
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