CN102937322A - Rotation speed control method of air conditioner compressor and air conditioner - Google Patents
Rotation speed control method of air conditioner compressor and air conditioner Download PDFInfo
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- CN102937322A CN102937322A CN2012104983402A CN201210498340A CN102937322A CN 102937322 A CN102937322 A CN 102937322A CN 2012104983402 A CN2012104983402 A CN 2012104983402A CN 201210498340 A CN201210498340 A CN 201210498340A CN 102937322 A CN102937322 A CN 102937322A
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Abstract
The invention discloses a rotation speed control method of an air conditioner compressor and an air conditioner. The method comprises the following steps of: firstly detecting the temperature Tw of an environment in which an outdoor machine of the air conditioner is located; then determining an allowed running current value I of the air conditioner compressor according to the temperature Tw of the outdoor environment as well as a running mode of the air conditioner; and finally, detecting a real-time current value Ict of the air conditioner compressor, comparing the real-time current value Ict with the allowed running current value I, and lowering the rotation speed of the air conditioner compressor if the Ict>1 until meeting the condition that Ict<=1. The air conditioner provided by the invention implements different control strategies on the rotation speed of the compressor through the temperature of the outdoor environment, when the temperature of the outdoor environment is high, current passing through the compressor and a driving board canbe limited by limiting the rotation speed of the compressor, and thus the running current of the air compressor is always restricted within a range in which each electricity load on the driving board can run safely, so that the safety of the operation of the driving board is ensured, and the running reliability of the whole air conditioner is improved.
Description
Technical field
The invention belongs to the air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of for the method for controlling the cooler compressor rotating speed and the air-conditioner that adopts this method for controlling number of revolution design.
Background technology
Along with warming gradually of terrestrial climate and improving constantly of people's living standard, it is day by day extensive that air-conditioning products has progressively been come into huge numbers of families and the scope of application.Existing air-conditioning products generally all comprises indoor set and off-premises station two parts, when the residing environment temperature of off-premises station is higher (higher two aspects that comprise of the outdoor environment temperature here: the one,, when air-conditioner is operated in the refrigerating operaton pattern, if outdoor environment temperature is more than or equal to 38 ℃, think that outdoor environment temperature is higher; The 2nd,, when air-conditioner is operated in the heating operation pattern, if outdoor environment temperature is more than or equal to 10 ℃, think that outdoor environment temperature is higher), air-conditioner often can operate in the overload zone., cause possibly the electric current that moves in air-conditioner excessive, thereby affect the even whole air-conditioner reliability of operation of off-premises station control panel when the overlond running due to air-conditioner.
Summary of the invention
The present invention moves and easily causes the air-conditioner running current excessive in order to solve existing air-conditioning products when outdoor environment temperature is higher, thereby affect the problem of whole aircraft reliability, a kind of method that limits the air-conditioner running current by controlling compressor rotary speed has been proposed, to improve the complete machine reliability of operation.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of method for controlling number of revolution of compressor of air conditioner comprises following process:
Detect the temperature of air-conditioner outdoor unit environment of living in, be designated as outdoor environment temperature Tw;
Determine the permission running current value I of compressor of air conditioner according to the operational mode of described outdoor environment temperature Tw and air-conditioner;
Detect the real-time current value Ict of compressor of air conditioner, and compare with described permission running current value I, if Ict I, reduce the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.
Further, when determining described permission running current value I, if air-conditioner operates in refrigeration mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T0, I=Imax; Wherein, the span of T0 is 35 ℃ ~ 40 ℃, and Imax takes the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) when T0<Tw≤T1, I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 ℃ ~ 43 ℃, and I1 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T1, normal operation allows;
(3) when T1<Tw≤T2, I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 ℃ ~ 52 ℃, and I2 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T2, normal operation allows;
(4) as Tw > during T2, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
When determining described permission running current value I, if air-conditioner operates in heating mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T3, I=Imax; Wherein, the span of T3 is 10 ℃ ~ 13 ℃, and Imax takes the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) when T3<Tw≤T4, I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 ℃ ~ 15 ℃, and I4 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T4, normal operation allows;
(3) when T4<Tw≤T5, I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 ℃ ~ 27 ℃, and I5 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T5, normal operation allows;
(4) as Tw > during T5, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
Acquisition for described real-time current value Ict, preferably utilize the operate power that detects compressor in air-conditioner for the power factor corrector on the drive plate that drives described compressor operating, and generate described real-time current value Ict in conjunction with the input voltage of compressor.
Further, as Ict > during I, control the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I.
And, when I-Δ I<Ict≤I, the current rotating speed that maintains compressor is constant; Wherein, the span of Δ I is 0.5A ~ 0.7A, preferably sets Δ I=0.6A.
Based on the above-mentioned compressor method for controlling number of revolution, the present invention also provides a kind of air-conditioner, comprise indoor set and off-premises station, be provided with sensor, control module, the compressor for detection of off-premises station environment temperature of living in and the drive plate moved for the drive compression machine in described off-premises station; Wherein, described sensor transfers to control module by the outdoor environment temperature Tw detected; Control module is determined the permission running current value I of described compressor according to the operational mode of outdoor environment temperature Tw and air-conditioner, and the real-time current value Ict of described permission running current value I and compressor is compared; If Ict > I, reduce the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.
Further, described control module, when determining described permission running current value I, adopts following value principle:
If air-conditioner operates in refrigeration mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T0, I=Imax; Wherein, the span of T0 is 35 ℃ ~ 40 ℃, and Imax gets the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on drive plate;
(2) when T0<Tw≤T1, I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 ℃ ~ 43 ℃, and I1 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T1, normal operation allows;
(3) when T1<Tw≤T2, I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 ℃ ~ 52 ℃, and I2 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T2, normal operation allows;
(4) as Tw > during T2, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A;
If air-conditioner operates in heating mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T3, I=Imax; Wherein, the span of T3 is 10 ℃ ~ 13 ℃, and Imax gets the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on drive plate;
(2) when T3<Tw≤T4, I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 ℃ ~ 15 ℃, and I4 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T4, normal operation allows;
(3) when T4<Tw≤T5, I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 ℃ ~ 27 ℃, and I5 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T5, normal operation allows;
(4) as Tw > during T5, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
Further again, be provided with power factor corrector on described drive plate, described power factor corrector is connected in the current supply circuit of compressor, utilize described power factor corrector to detect the operate power of compressor and the input voltage of compressor, and transfer to control module and generate described real-time current value Ict.
Further, described control module is detecting Ict > during I, the output control signal transfers to drive plate, controls by drive plate the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I; When control module detects I-Δ I<Ict≤I, controlling drive plate, to maintain the current rotating speed of compressor constant; Wherein, the span of Δ I is 0.5A ~ 0.7A.
Compared with prior art, advantage of the present invention and good effect are: air-conditioner of the present invention is implemented different control strategies according to the height of outdoor environment temperature to the working speed of compressor, running speed by limit compression machine when outdoor environment temperature is higher, reach the restriction of the electric current on convection current overcompression machine and drive plate, and then the running current that makes air-conditioner be limited in all the time on drive plate each with electric loading can the scope of safe operation in, guarantee thus the security of drive plate work, improved air-conditioner complete machine reliability of operation.
After reading by reference to the accompanying drawings the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
The accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of air-conditioner proposed by the invention;
Fig. 2 is the program flow diagram of a kind of embodiment of the method for controlling number of revolution of compressor of air conditioner proposed by the invention;
Fig. 3 is air-conditioner while operating in refrigeration mode, the corresponding relation figure between the permission running current value of outdoor environment temperature and compressor;
Fig. 4 is air-conditioner while operating in heating mode, the corresponding relation figure between the permission running current value of outdoor environment temperature and compressor.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The present invention still can guarantee safe operation in order to make air-conditioning products in the situation that outdoor environment temperature is higher, operational mode in conjunction with outdoor environment temperature Tw and air-conditioner, determine the permission running current value I of compressor of air conditioner, guarantee in air-conditioner outdoor unit on drive plate the current value that each can safe operation by electric loading.Then, utilize described permission running current value I to be limited the actual motion electric current of compressor, make the real-time current value Ict of compressor be less than or equal to described permission running current value I, thereby reach the purpose of design of guaranteeing the air-conditioner safe operation.
In the process of the actual motion electric current that limits described compressor, the present invention adopts the control strategy of limit compression machine rotating speed, at Ict > during I, reach the purpose of design that reduces the compressor real-time current by the rotating speed that reduces compressor of air conditioner, until meet the condition of Ict≤I.Running current by the limit compression machine, make in off-premises station controlled for the electric current on the drive plate of drive compression machine operation, thereby the phenomenon of having avoided the heater element on the drive plate to cause temperature rise to surpass each maximum temperaturerise allowed by electric loading on drive plate because electric current is excessive occurs, and has improved drive plate, compressor and even complete machine reliability of operation.
Below by a specific embodiment, the method for controlling number of revolution of air-conditioner hardware assembling structure of the present invention and compressor is at length set forth.
Embodiment mono-, and at first the present embodiment is elaborated to the hardware assembling structure of air-conditioner, shown in Figure 1.The air-conditioner of the present embodiment comprises indoor set and off-premises station two parts, wherein, is provided with compressor, the drive plate moved for the drive compression machine and the control panel that connects described drive plate and communicate by letter with indoor set in off-premises station.Described control panel, as the control core of off-premises station circuit, receives the control instruction of indoor set, and realizes the driving of the executing agency such as compressor, evaporimeter in off-premises station is controlled by controlling drive plate, and air-conditioner is operated under user-selected mode of operation.
For the temperature to off-premises station environment of living in is detected, the present embodiment is provided with the sensor for detection of outdoor environment temperature in off-premises station, it is outdoor temperature sensor, connect the control module on the off-premises station control panel, with the Real-time Collection outdoor environment temperature, and feed back to control module, to determine, the rotating speed of compressor is carried out to which kind of control strategy.
For described control module, determine the permission running current value I of compressor according to the outdoor environment temperature Tw received and the current operational mode (being refrigerating operaton pattern or heating operation pattern) of air-conditioner, and gather the operate power of compressor and the input voltage of compressor by the power factor corrector PFC on drive plate, and then the real-time current value Ict that calculates compressor according to operate power and the input voltage of compressor.Then, control module compares the real-time current value Ict of described permission running current value I and compressor; If Ict > I, reduce the rotating speed of compressor of air conditioner, the real-time current value Ict of compressor is reduced, until meet the condition of Ict≤I.If I-Δ I<Ict≤I, wherein, Δ I is value in the scope of 0.5A ~ 0.7A, and the electric current on drive plate is excessive, and it is constant that the rotating speed of preferably controlling compressor maintains current rotating speed.If Ict≤I-Δ I, do not limited the rotating speed of compressor, the rotating speed calculated according to set control algolithm is controlled and is got final product compressor.
Below in conjunction with Fig. 2, the concrete control procedure of the compressor rotary speed control strategy performed to control module is explained in detail.
S201, startup air-conditioner start operation, and the operational mode of selecting according to user control air-conditioner enters corresponding operational mode;
The outdoor environment temperature Tw that S202, reception outdoor temperature sensor detect;
S203, the current operational mode of judgement air-conditioner, if the refrigerating operaton pattern performs step S204; If the heating operation pattern, perform step S205;
S204, according to outdoor environment temperature Tw, determine the permission running current value I of compressor under the refrigerating operaton pattern, and jump to step S206;
In this process, the present embodiment adopts following value principle to set the permission running current value I of compressor, in conjunction with the corresponding relation curve map between the outdoor environment temperature Tw shown in Fig. 3 and permission running current value I, that is:
(1) when outdoor environment temperature Tw≤T0, the span of T0 is between 35 ℃ ~ 40 ℃, and outdoor environment temperature is not (for the refrigerating operaton pattern) in too high situation, sets the permission running current value I=Imax of compressor; Wherein, Imax is the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the off-premises station drive plate.
Owing to can be provided with many electric loadings of using on drive plate, such as PFC, heater element and other electronic components such as power model IPM, these and the electric current that flows through compressor can be flowed through equally on drive plate are used electric loading, there is different lowest high-current value (this lowest high-current value can find concrete numerical value from the product manual of electronic component) while due to different electricity consumptions, loading on normal operation, therefore only have the permission running current value I that limits compressor to be less than these with normally moving the minimum of a value Imax in the lowest high-current value allowed in electric loading, the security of operation of the whole loads of guarantee.Therefore, the present embodiment, in the situation that outdoor environment temperature is not too high, is less than Imax as long as control the real-time current value Ict of compressor, can guarantee the drive plate safe operation.
(2) when T0<Tw≤T1, the span of T1, between 38 ℃ ~ 43 ℃, is set permission running current value I=I1+ ((T1-Tw)/(the T1-T0)) * (Imax – I1) of compressor;
Wherein, I1 is that on the off-premises station drive plate, whole electricity consumptions load on the minimum of a value in the lowest high-current value that under the condition that temperature is T1, normal operation allows.The lowest high-current value that when on drive plate, each electricity consumption loads on temperature and is T1, normal operation allows all can be searched acquisition from the product manual of each load.
(3) when T1<Tw≤T2, the span of T2, between 43 ℃ ~ 52 ℃, is set permission running current value I=I2+ ((T2-Tw)/(the T2-T1)) * (I1 – I2) of compressor;
Wherein, I2 is that on the off-premises station drive plate, whole electricity consumptions load on the minimum of a value in the lowest high-current value that under the condition that temperature is T2, normal operation allows.Same, the lowest high-current value that when on drive plate, each electricity consumption loads on temperature and is T2, normal operation allows also can be respectively from the product manual of each load correspondence search acquisition.
(4) as Tw > during T2, set the permission running current value I=Imin of compressor;
Wherein, Imin can adopt in two ways and determine: a kind of minimum current value that is the normal operation of compressor allows is set to described Imin; Another kind is to determine according to following principle according to the specified refrigerating capacity Q of air-conditioner, that is:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
The specified refrigerating capacity Q of described air-conditioner can search acquisition from the product manual of air-conditioner, i.e. the refrigerating capacity of (1 hour) air-conditioner in the unit interval.
S205, according to described outdoor environment temperature Tw, determine the permission running current value I of compressor under the heating operation pattern;
In this process, the present embodiment adopts following value principle to set the permission running current value I of compressor, in conjunction with the corresponding relation curve map between the outdoor environment temperature Tw shown in Fig. 4 and permission running current value I, that is:
(1) when outdoor environment temperature Tw≤T3, the span of T3 is between 10 ℃ ~ 13 ℃, and outdoor environment temperature is not (for the heating operation pattern) in too high situation, sets the permission running current value I=Imax of compressor; Wherein, Imax is the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the off-premises station drive plate.
(2) when T3<Tw≤T4, the span of T4, between 13 ℃ ~ 15 ℃, is set permission running current value I=I4+ ((T4-Tw)/(the T4-T3)) * (Imax – I4) of compressor;
Wherein, I4 is that on the off-premises station drive plate, whole electricity consumptions load on the minimum of a value in the lowest high-current value that under the condition that temperature is T4, normal operation allows.The lowest high-current value that when on drive plate, each electricity consumption loads on temperature and is T4, normal operation allows all can be searched acquisition from the product manual of each load.
(3) when T4<Tw≤T5, the span of T5, between 15 ℃ ~ 27 ℃, is set permission running current value I=I5+ ((T5-Tw)/(the T5-T4)) * (I4 – I5) of compressor;
Wherein, I5 is that on the off-premises station drive plate, whole electricity consumptions load on the minimum of a value in the lowest high-current value that under the condition that temperature is T5, normal operation allows.Same, the lowest high-current value that when on drive plate, each electricity consumption loads on temperature and is T5, normal operation allows also can be searched acquisition from each by correspondence the product manual of electric loading respectively.
(4) as Tw > during T5, set the permission running current value I=Imin of compressor;
Wherein, Imin can adopt in two ways and determine: a kind of minimum current value that is the normal operation of compressor allows is set to described Imin; Another kind is to determine according to following principle according to the specified refrigerating capacity Q of air-conditioner, that is:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
The specified refrigerating capacity Q of described air-conditioner can search acquisition from the product manual of air-conditioner, i.e. the refrigerating capacity (under heating mode, also can be referred to as heating capacity) of (1 hour) air-conditioner in the unit interval.
The real-time current value Ict of S206, detection compressor;
In the present embodiment, preferably by the PFC be arranged on drive plate in the compressor current supply circuit, detect the operate power of compressor, and gather the input voltage of compressor.PFC transfers to control module in real time by described operate power and input voltage, generates the real-time current value Ict of compressor by control module.
S207, the permission running current value I of the real-time current value Ict of compressor and compressor is compared, to determine the control mode of compressor rotary speed, that is:
If Ict≤I-Δ I, wherein, Δ I is value in the scope of 0.5A ~ 0.7A, preferably set Δ I=0.6A, think that the running current of compressor, much smaller than the safe current of drive plate, now, is limited without the rotating speed to compressor, only need calculate according to existing compressor rotary speed control algolithm the tachometer value of compressor, and then the control compressor operation gets final product;
If I-Δ I<Ict≤I, the preferred settings scope is between I-0.6A<Ict≤I, and the current rotating speed that maintains compressor is constant, in order to avoid the running current of compressor surpasses, allows running current value I;
If Ict > I, think that the electric current on drive plate is excessive, need the rotating speed of controlling compressor to reduce, the real-time current value Ict of compressor is descended, until meet the condition of Ict≤I.
In the present embodiment, as Ict > during I, preferably control compressor and run slowly to reduce by 2 speed that turn (2rps) each second.When the running current of compressor drops to I-Δ I<Ict≤I when interval, control compressor rotary speed and remain unchanged.When the running current of compressor drops to I-Δ I when following, exit the limit procedure to compressor rotary speed.
S208, return to step S202 and repeat above-mentioned detection speed limit process.
The present invention is controlled the running current of air-conditioner by the rotating speed of restriction compressor of air conditioner, thereby solved when outdoor environment temperature is too high, the problem that causes the air-conditioner operational reliability to reduce because the air-conditioner running current is excessive, improved the security that the air-conditioning products complete machine moves.
Certainly; the above is only a kind of preferred embodiment of the present invention; it should be noted 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. the method for controlling number of revolution of a compressor of air conditioner is characterized in that:
Detect the temperature of air-conditioner outdoor unit environment of living in, be designated as outdoor environment temperature Tw;
Determine the permission running current value I of compressor of air conditioner according to the operational mode of described outdoor environment temperature Tw and air-conditioner;
Detect the real-time current value Ict of compressor of air conditioner, and compare with described permission running current value I, if Ict I, reduce the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.
2. the method for controlling number of revolution of compressor of air conditioner according to claim 1 is characterized in that: when determining described permission running current value I, if air-conditioner operates in refrigeration mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T0, I=Imax; Wherein, the span of T0 is 35 ℃ ~ 40 ℃, and Imax takes the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) when T0<Tw≤T1, I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 ℃ ~ 43 ℃, and I1 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T1, normal operation allows;
(3) when T1<Tw≤T2, I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 ℃ ~ 52 ℃, and I2 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T2, normal operation allows;
(4) as Tw > during T2, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
3. the method for controlling number of revolution of compressor of air conditioner according to claim 1 is characterized in that: when determining described permission running current value I, if air-conditioner operates in heating mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T3, I=Imax; Wherein, the span of T3 is 10 ℃ ~ 13 ℃, and Imax takes the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) when T3<Tw≤T4, I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 ℃ ~ 15 ℃, and I4 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T4, normal operation allows;
(3) when T4<Tw≤T5, I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 ℃ ~ 27 ℃, and I5 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T5, normal operation allows;
(4) as Tw > during T5, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
4. the method for controlling number of revolution of compressor of air conditioner according to claim 1, it is characterized in that: utilize the operate power that detects compressor in air-conditioner for the power factor corrector on the drive plate that drives described compressor operating, and generate described real-time current value Ict in conjunction with the input voltage of compressor.
5., according to the method for controlling number of revolution of the described compressor of air conditioner of any one in claim 1 to 4, it is characterized in that: as Ict during I, control the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I.
6. the method for controlling number of revolution of compressor of air conditioner according to claim 5 is characterized in that: when I-Δ I<Ict≤I, the current rotating speed that maintains compressor is constant; Wherein, the span of Δ I is 0.5A ~ 0.7A.
7. an air-conditioner, comprise indoor set and off-premises station, is provided with sensor, control module, the compressor for detection of off-premises station environment temperature of living in and the drive plate moved for the drive compression machine in described off-premises station; It is characterized in that: described sensor transfers to control module by the outdoor environment temperature Tw detected; Control module is determined the permission running current value I of described compressor according to the operational mode of outdoor environment temperature Tw and air-conditioner, and the real-time current value Ict of described permission running current value I and compressor is compared; If Ict > I, reduce the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.
8. air-conditioner according to claim 7 is characterized in that: described control module, when determining described permission running current value I, adopts following value principle:
If air-conditioner operates in refrigeration mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T0, I=Imax; Wherein, the span of T0 is 35 ℃ ~ 40 ℃, and Imax gets the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on drive plate;
(2) when T0<Tw≤T1, I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 ℃ ~ 43 ℃, and I1 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T1, normal operation allows;
(3) when T1<Tw≤T2, I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 ℃ ~ 52 ℃, and I2 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T2, normal operation allows;
(4) as Tw > during T2, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A;
If air-conditioner operates in heating mode, according to following principle, determine the permission running current value I of compressor:
(1) when Tw≤T3, I=Imax; Wherein, the span of T3 is 10 ℃ ~ 13 ℃, and Imax gets the minimum of a value in the lowest high-current value all allowed with the normal operation of electric loading on drive plate;
(2) when T3<Tw≤T4, I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 ℃ ~ 15 ℃, and I4 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T4, normal operation allows;
(3) when T4<Tw≤T5, I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 ℃ ~ 27 ℃, and I5 gets whole electricity consumptions on described drive plate and loads on the minimum of a value in the lowest high-current value that under the condition that temperature is T5, normal operation allows;
(4) as Tw > during T5, I=Imin; Wherein, Imin is the compressor minimum current value that normally operation allows or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner:
When Q≤4500W, Imin=1.5A;
When 4500W<Q≤7100W, Imin=2A;
When 7100W<Q≤12000W, Imin=2.5A.
9. air-conditioner according to claim 7, it is characterized in that: on described drive plate, be provided with power factor corrector, described power factor corrector is connected in the current supply circuit of compressor, utilize described power factor corrector to detect the operate power of compressor and the input voltage of compressor, and transfer to control module and generate described real-time current value Ict.
10. according to the described air-conditioner of any one in claim 7 to 9, it is characterized in that: described control module is detecting Ict > during I, the output control signal transfers to drive plate, controls by drive plate the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I; When control module detects I-Δ I<Ict≤I, controlling drive plate, to maintain the current rotating speed of compressor constant; Wherein, the span of Δ I is 0.5A ~ 0.7A.
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