CN102937322B - 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 PDF

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Publication number
CN102937322B
CN102937322B CN201210498340.2A CN201210498340A CN102937322B CN 102937322 B CN102937322 B CN 102937322B CN 201210498340 A CN201210498340 A CN 201210498340A CN 102937322 B CN102937322 B CN 102937322B
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compressor
time
current value
tw
deg
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CN201210498340.2A
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CN102937322A (en
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康月
张永良
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海信(山东)空调有限公司
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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

The method for controlling number of revolution of compressor of air conditioner and air-conditioner

Technical field

The invention belongs to air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of for controlling the method for cooler compressor rotating speed and adopting the air-conditioner of 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, in the time that the residing environment temperature of off-premises station is higher (higher two aspects that comprise of outdoor environment temperature here: the one,, in the time that air-conditioner is operated in refrigerating operaton pattern, if outdoor environment temperature is more than or equal to 38 DEG C, think that outdoor environment temperature is higher; The 2nd,, in the time that air-conditioner is operated in heating operation pattern, if outdoor environment temperature is more than or equal to 10 DEG C, think that outdoor environment temperature is higher), air-conditioner often can operate in overload region.Because air-conditioner is when the overlond running, causes 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.

Summary of the invention

The present invention moves and easily causes air-conditioner running current excessive in order to solve existing air-conditioning products in the time that outdoor environment temperature is higher, thereby affect the problem of whole aircraft reliability, a kind of method that limits air-conditioner running current by controlling compressor rotary speed is proposed, to improve 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 method for controlling number of revolution for compressor of air conditioner, comprises following process:

The temperature that detects air-conditioner outdoor unit environment of living in, is 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 reduces the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.

Further, in the time determining described permission running current value I, if air-conditioner operates in refrigeration mode, determine the permission running current value I of compressor according to following principle:

(1) in the time of Tw≤T0, I=Imax; Wherein, the span of T0 is 35 DEG C ~ 40 DEG C, and Imax takes the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on the drive plate that drives described compressor operating;

(2) in the time of T0<Tw≤T1, and I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 DEG C ~ 43 DEG C, 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) in the time of T1<Tw≤T2, and I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 DEG C ~ 52 DEG C, 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) in the time of Tw>T2, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A.

In the time determining described permission running current value I, if air-conditioner operates in heating mode, determine the permission running current value I of compressor according to following principle:

(1) in the time of Tw≤T3, I=Imax; Wherein, the span of T3 is 10 DEG C ~ 13 DEG C, and Imax takes the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on the drive plate that drives described compressor operating;

(2) in the time of T3<Tw≤T4, and I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 DEG C ~ 15 DEG C, 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) in the time of T4<Tw≤T5, and I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 DEG C ~ 27 DEG C, 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) in the time of Tw>T5, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A.

For the acquisition of described real-time current value Ict, preferably utilize in air-conditioner the power factor corrector on the drive plate for driving described compressor operating to detect the operate power of compressor, and calculate and generate described real-time current value Ict in conjunction with the input voltage of compressor.

Further, in the time of Ict>I, control the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I.

And in the time of 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 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, in described off-premises station, be provided with sensor, control module, compressor and the drive plate for the operation of drive compression machine for detection of off-premises station environment temperature of living in; Wherein, the outdoor environment temperature Tw detecting is transferred to control module by described sensor; 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, reduces the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I.

Further, described control module, in the time determining described permission running current value I, adopts following value principle:

If air-conditioner operates in refrigeration mode, determine the permission running current value I of compressor according to following principle:

(1) in the time of Tw≤T0, I=Imax; Wherein, the span of T0 is 35 DEG C ~ 40 DEG C, and Imax gets the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on drive plate;

(2) in the time of T0<Tw≤T1, and I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 DEG C ~ 43 DEG C, 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) in the time of T1<Tw≤T2, and I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 DEG C ~ 52 DEG C, 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) in the time of Tw>T2, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A;

If air-conditioner operates in heating mode, determine the permission running current value I of compressor according to following principle:

(1) in the time of Tw≤T3, I=Imax; Wherein, the span of T3 is 10 DEG C ~ 13 DEG C, and Imax gets the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on drive plate;

(2) in the time of T3<Tw≤T4, and I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 DEG C ~ 15 DEG C, 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) in the time of T4<Tw≤T5, and I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 DEG C ~ 27 DEG C, 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) in the time of Tw>T5, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A.

Further again, 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 the described real-time current value Ict of control module calculating generation.

Further, described control module is in the time Ict>I being detected, and output control signal transfers to drive plate, and the rate reduction turning with each second 2 by drive plate control compressor, until meet the condition of Ict≤I; In the time that control module detects I-Δ I<Ict≤I, the current rotating speed that control drive plate maintains compressor is 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, by the running speed of limit compression machine in the time that 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.

Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.

Brief description of the drawings

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.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.

The present invention is in order to make air-conditioning products still can ensure safe operation in the situation that outdoor environment temperature is higher, in conjunction with the operational mode of outdoor environment temperature Tw and air-conditioner, determine the permission running current value I of compressor of air conditioner, ensure in air-conditioner outdoor unit each current value that can safe operation by electric loading on drive plate.Then, utilize described permission running current value I to limit 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 air-conditioner safe operation.

In the process of actual motion electric current that limits described compressor, the present invention adopts the control strategy of limit compression machine rotating speed, in the time of Ict>I, reach by reducing the rotating speed of compressor of air conditioner the purpose of design that reduces compressor real-time current, until meet the condition of Ict≤I.By the running current of 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 drive plate to cause temperature rise to exceed the maximum temperaturerise respectively allowing 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-, 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 in off-premises station, for the drive plate of drive compression machine operation and the control panel that connects described drive plate and communicate by letter with indoor set.Described control panel, as the control core of off-premises station circuit, receives the control instruction of indoor set, and realizes the driving control to the executing agency such as compressor, evaporimeter in off-premises station by controlling drive plate, and air-conditioner is operated under user-selected mode of operation.

For the temperature of 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 off-premises station control panel, with 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 receiving and the current operational mode (being refrigerating operaton pattern or heating operation pattern) of air-conditioner, and power factor corrector PFC by drive plate gathers the operate power of compressor and the input voltage of compressor, and then calculate the real-time current value Ict of compressor according to the operate power of compressor and input voltage.Then, control module compares the real-time current value Ict of described permission running current value I and compressor; If Ict>I, reduces 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, does not limit the rotating speed of compressor, the rotating speed calculating according to set control algolithm is controlled compressor.

Below in conjunction with Fig. 2, the concrete control procedure of the performed compressor rotary speed control strategy of control module is explained in detail.

S201, startup air-conditioner start operation, and the operational mode control air-conditioner of selecting according to user enters corresponding operational mode;

The outdoor environment temperature Tw that S202, reception outdoor temperature sensor detect;

S203, judge the operational mode that air-conditioner is current, if refrigerating operaton pattern performs step S204; If heating operation pattern, performs step S205;

S204, determine the permission running current value I of compressor under refrigerating operaton pattern according to outdoor environment temperature Tw, 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) in the time of outdoor environment temperature Tw≤T0, the span of T0 is between 35 DEG C ~ 40 DEG C, and outdoor environment temperature is not (for 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 allowing with the normal operation of electric loading on off-premises station drive plate.

Many by electric loading owing to can being provided with on drive plate, such as PFC, heater element and other electronic components such as power model IPM, and these use electric loadings that the electric current that flows through compressor can be flowed through on drive plate equally, while loading on normal operation due to different electricity consumptions, there is different lowest high-current value (this lowest high-current value can find concrete numerical value from the product manual of electronic component), 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 allowing in electric loading, the security of operation of the whole loads of guarantee.Therefore, the in the situation that the present embodiment not being too high at outdoor environment temperature, be less than Imax as long as control the real-time current value Ict of compressor, can ensure drive plate safe operation.

(2) in the time of T0<Tw≤T1, the span of T1, between 38 DEG C ~ 43 DEG C, is set permission running current value I=I1+ ((T1-Tw)/(the T1-T0)) * (Imax – I1) of compressor;

Wherein, I1 on off-premises station drive plate all 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 each electricity consumption loads on temperature for T1 on drive plate, normal operation allows all can be searched and obtain from the product manual of each load.

(3), in the time of T1<Tw≤T2, the span of T2, between 43 DEG C ~ 52 DEG C, is set permission running current value I=I2+ ((T2-Tw)/(the T2-T1)) * (I1 – I2) of compressor;

Wherein, I2 on off-premises station drive plate all 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 each electricity consumption loads on temperature for T2 on drive plate, normal operation allows also can be respectively from the product manual of each load correspondence search and obtain.

(4), in the time of Tw>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:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A.

The specified refrigerating capacity Q of described air-conditioner can search and obtain from the product manual of air-conditioner, i.e. the refrigerating capacity of (1 hour) air-conditioner in the unit interval.

S205, determine the permission running current value I of compressor under heating operation pattern according to described outdoor environment temperature Tw;

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) in the time of outdoor environment temperature Tw≤T3, the span of T3 is between 10 DEG C ~ 13 DEG C, and outdoor environment temperature is not (for 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 allowing with the normal operation of electric loading on off-premises station drive plate.

(2) in the time of T3<Tw≤T4, the span of T4, between 13 DEG C ~ 15 DEG C, is set permission running current value I=I4+ ((T4-Tw)/(the T4-T3)) * (Imax – I4) of compressor;

Wherein, I4 on off-premises station drive plate all 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 each electricity consumption loads on temperature for T4 on drive plate, normal operation allows all can be searched and obtain from the product manual of each load.

(3), in the time of T4<Tw≤T5, the span of T5, between 15 DEG C ~ 27 DEG C, is set permission running current value I=I5+ ((T5-Tw)/(the T5-T4)) * (I4 – I5) of compressor;

Wherein, I5 on off-premises station drive plate all 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 each electricity consumption loads on temperature for T5 on drive plate, normal operation allows also can be searched and obtain by correspondence the product manual of electric loading from each respectively.

(4), in the time of Tw>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:

In the time of Q≤4500W, Imin=1.5A;

In the time of 4500W<Q≤7100W, Imin=2A;

In the time of 7100W<Q≤12000W, Imin=2.5A.

The specified refrigerating capacity Q of described air-conditioner can search and obtain 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 detect the operate power of compressor by the PFC being arranged on drive plate in compressor current supply circuit, and gather the input voltage of compressor.Described operate power and input voltage are transferred in real time control module by PFC, calculates the real-time current value Ict that generates 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, limits without the rotating speed to compressor, only need calculate according to existing compressor rotary speed control algolithm the tachometer value of compressor, and then control compressor operation;

If I-Δ I<Ict≤I, preferred settings scope is between I-0.6A<Ict≤I, and the current rotating speed that maintains compressor is constant, allows running current value I in order to avoid the running current of compressor exceedes;

If Ict>I, thinks that the electric current on drive plate is excessive, the rotating speed that need to control compressor reduces, and the real-time current value Ict of compressor is declined, until meet the condition of Ict≤I.

In the present embodiment, in the time of Ict>I, preferably control compressor and run slowly to reduce by 2 speed that turn (2rps) each second.In the time that the running current of compressor drops to I-Δ I<Ict≤I interval, control compressor rotary speed and remain unchanged.Below the running current of compressor drops to I-Δ I time, exit the limit procedure to compressor rotary speed.

S208, return to step S202 and repeat above-mentioned detection speed limit process.

The present invention controls the running current of air-conditioner by the rotating speed of restriction compressor of air conditioner, thereby solve in the time that outdoor environment temperature is too high, the problem that causes air-conditioner operational reliability to reduce because air-conditioner running current is excessive, has improved the security that 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 (7)

1. a method for controlling number of revolution for compressor of air conditioner, is characterized in that:
The temperature that detects air-conditioner outdoor unit environment of living in, is 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 reduces the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I; Wherein,
In the time determining described permission running current value I, if air-conditioner operates in refrigeration mode, determine the permission running current value I of compressor according to following principle:
(1) in the time of Tw≤T0, I=Imax; Wherein, the span of T0 is 35 DEG C ~ 40 DEG C, and Imax takes the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) in the time of T0<Tw≤T1, and I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 DEG C ~ 43 DEG C, 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) in the time of T1<Tw≤T2, and I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 DEG C ~ 52 DEG C, 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) in the time of Tw>T2, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:
In the time of Q≤4500W, Imin=1.5A;
In the time of 4500W<Q≤7100W, Imin=2A;
In the time of 7100W<Q≤12000W, Imin=2.5A;
If air-conditioner operates in heating mode, determine the permission running current value I of compressor according to following principle:
(1) in the time of Tw≤T3, I=Imax; Wherein, the span of T3 is 10 DEG C ~ 13 DEG C, and Imax takes the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on the drive plate that drives described compressor operating;
(2) in the time of T3<Tw≤T4, and I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 DEG C ~ 15 DEG C, 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) in the time of T4<Tw≤T5, and I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 DEG C ~ 27 DEG C, 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) in the time of Tw>T5, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:
In the time of Q≤4500W, Imin=1.5A;
In the time of 4500W<Q≤7100W, Imin=2A;
In the time of 7100W<Q≤12000W, Imin=2.5A.
2. the method for controlling number of revolution of compressor of air conditioner according to claim 1, it is characterized in that: utilize in air-conditioner the power factor corrector on the drive plate for driving described compressor operating to detect the operate power of compressor, and calculate and generate described real-time current value Ict in conjunction with the input voltage of compressor.
3. the method for controlling number of revolution of compressor of air conditioner according to claim 1 and 2, is characterized in that: in the time of Ict>I, control the rate reduction that compressor turned with each second 2, until meet the condition of Ict≤I.
4. the method for controlling number of revolution of compressor of air conditioner according to claim 3, is characterized in that: in the time of 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.
5. an air-conditioner, comprises indoor set and off-premises station, is provided with sensor, control module, compressor and the drive plate for the operation of drive compression machine for detection of off-premises station environment temperature of living in described off-premises station; It is characterized in that: the outdoor environment temperature Tw detecting is transferred to control module by described sensor; 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, reduces the rotating speed of compressor of air conditioner, until meet the condition of Ict≤I; Wherein,
Described control module, in the time determining described permission running current value I, adopts following value principle:
If air-conditioner operates in refrigeration mode, determine the permission running current value I of compressor according to following principle:
(1) in the time of Tw≤T0, I=Imax; Wherein, the span of T0 is 35 DEG C ~ 40 DEG C, and Imax gets the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on drive plate;
(2) in the time of T0<Tw≤T1, and I=I1+ ((T1-Tw)/(T1-T0)) * (Imax – I1); Wherein, the span of T1 is 38 DEG C ~ 43 DEG C, 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) in the time of T1<Tw≤T2, and I=I2+ ((T2-Tw)/(T2-T1)) * (I1 – I2); Wherein, the span of T2 is 43 DEG C ~ 52 DEG C, 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) in the time of Tw>T2, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:
In the time of Q≤4500W, Imin=1.5A;
In the time of 4500W<Q≤7100W, Imin=2A;
In the time of 7100W<Q≤12000W, Imin=2.5A;
If air-conditioner operates in heating mode, determine the permission running current value I of compressor according to following principle:
(1) in the time of Tw≤T3, I=Imax; Wherein, the span of T3 is 10 DEG C ~ 13 DEG C, and Imax gets the minimum of a value in the lowest high-current value all allowing with the normal operation of electric loading on drive plate;
(2) in the time of T3<Tw≤T4, and I=I4+ ((T4-Tw)/(T4-T3)) * (Imax – I4); Wherein, the span of T4 is 13 DEG C ~ 15 DEG C, 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) in the time of T4<Tw≤T5, and I=I5+ ((T5-Tw)/(T5-T4)) * (I4 – I5); Wherein, the span of T5 is 15 DEG C ~ 27 DEG C, 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) in the time of Tw>T5, I=Imin; Wherein, Imin moves the minimum current value allowing or determines according to following principle according to the specified refrigerating capacity Q of air-conditioner for compressor is normal:
In the time of Q≤4500W, Imin=1.5A;
In the time of 4500W<Q≤7100W, Imin=2A;
In the time of 7100W<Q≤12000W, Imin=2.5A.
6. air-conditioner according to claim 5, 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 the described real-time current value Ict of control module calculating generation.
7. according to the air-conditioner described in claim 5 or 6, it is characterized in that: described control module is in the time Ict>I being detected, output control signal transfers to drive plate, and the rate reduction turning with each second 2 by drive plate control compressor, until meet the condition of Ict≤I; In the time that control module detects I-Δ I<Ict≤I, the current rotating speed that control drive plate maintains compressor is constant; Wherein, the span of Δ I is 0.5A ~ 0.7A.
CN201210498340.2A 2012-11-29 2012-11-29 Rotation speed control method of air conditioner compressor and air conditioner CN102937322B (en)

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