CN106288130B - The control method and air conditioner of air-conditioner outdoor unit motor - Google Patents
The control method and air conditioner of air-conditioner outdoor unit motor Download PDFInfo
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- CN106288130B CN106288130B CN201510283017.7A CN201510283017A CN106288130B CN 106288130 B CN106288130 B CN 106288130B CN 201510283017 A CN201510283017 A CN 201510283017A CN 106288130 B CN106288130 B CN 106288130B
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Abstract
The invention discloses a kind of control methods of air-conditioner outdoor unit motor, the following steps are included: in cooling mode, when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, the air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is obtained as initial gas pressure difference；According to the size of the initial gas pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted to corresponding revolving speed.The invention also discloses a kind of air conditioners.The control method of air-conditioner outdoor unit motor provided by the present invention, pass through the size according to the initial gas pressure difference being vented between air pressure and compressor return air pipe inner return-air air pressure in compressor exhaust pipe, the revolving speed of air-conditioner outdoor unit motor is adjusted to corresponding revolving speed, with adjust the air-conditioning system condensing pressure and evaporating pressure and to form normal pressure difference between the condensing pressure of the air-conditioning system and evaporating pressure, to promote the refrigeration stability and efficiency of the air-conditioning system at low ambient temperatures.
Description
Technical field
The present invention relates to air conditioner technical field more particularly to the control methods and air-conditioning of a kind of air-conditioner outdoor unit motor
Device.
Background technique
Under normal conditions, common air conditioner only freezes in the higher situation of ambient temperature, therefore often at present
The air conditioner seen usually only focuses on the comfort level and reliability freezed under high temperature environment.And it is close for communication base station, bar etc.
The biggish Space, Place of calorific value is closed, under the condition of low ambient temperature, indoor temperature is still higher, needs at this time
Air conditioner freezes at low ambient temperatures.When air conditioner common at present freezes at low ambient temperatures, due to external environment temperature
Spend lower, condensation effect is very good, if the revolving speed of air-conditioner outdoor unit motor is excessively high, the condensing pressure that will lead to air-conditioning system is too low
And evaporating pressure is excessively high, can not form pressure difference so as to cause the condensing pressure and evaporating pressure of air-conditioning system, poor refrigerating efficiency；If
The revolving speed of air-conditioner outdoor unit motor is too low, and the condensing pressure that will lead to air-conditioning system is excessively high and evaporating pressure is too low, so as to cause
Pressure difference is excessive between the condensing pressure and evaporating pressure of air-conditioning system, and the excessively high damage that will increase condenser of condensing pressure is several
Rate, evaporating pressure is too low, will lead to air conditioner and carries out anti-freeze protection, compressor shutdown phenomenon occurs, eventually lead to air conditioner
Can not normally it freeze.In this way, a kind of control method of air-conditioner outdoor unit motor is provided, to promote air-conditioning system at low ambient temperatures
Refrigeration stability, it is actually necessary.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of control method of air-conditioner outdoor unit motor and a kind of air conditioner, purports
Freeze at low ambient temperatures unstable and low refrigeration efficiency technical problem solving air-conditioning system in the prior art.
To achieve the above object, the control method of a kind of air-conditioner outdoor unit motor provided by the invention, comprising the following steps:
In cooling mode, when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, compressor air-discharging is obtained
Air pressure difference in pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is as initial gas pressure difference；
According to the size of the initial gas pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted to corresponding revolving speed.
Preferably, the size according to the initial gas pressure difference adjusts the revolving speed of air-conditioner outdoor unit motor to correspondence
The step of revolving speed includes:
When the initial gas pressure difference is less than or equal to the first preset pressure difference, turning for air-conditioner outdoor unit motor is adjusted
Speed is to the first revolving speed；
When the initial gas pressure difference is greater than the first preset pressure difference and is less than or equal to the second preset pressure difference,
The revolving speed of air-conditioner outdoor unit motor is adjusted to the second revolving speed；
When the initial gas pressure difference is greater than the second preset pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted to the
Three revolving speeds.
Preferably, first revolving speed is less than second revolving speed, and second revolving speed is less than the third revolving speed.
Preferably, first revolving speed in 0rpm between 450rpm, second revolving speed 450rpm to 750rpm it
Between, the third revolving speed is in 750rpm between 1000rpm.
Preferably, the size according to the initial gas pressure difference adjusts the revolving speed of air-conditioner outdoor unit motor to correspondence
After the step of revolving speed, further includes:
Every prefixed time interval, obtain in compressor exhaust pipe exhaust air pressure and the air pressure of compressor return air pipe inner return-air it
Between air pressure difference as current gas pressure difference；
When the current gas pressure difference is less than or equal to the first preset pressure difference, by the current of air-conditioner outdoor unit motor
Revolving speed is run after reducing the first speed variable；
When the current gas pressure difference is greater than the first preset pressure difference and is less than or equal to the second preset pressure difference,
Air-conditioner outdoor unit motor is run with current rotating speed；
When the current gas pressure difference is greater than the second preset pressure difference, the current rotating speed of air-conditioner outdoor unit motor is increased
It is run after adding the second speed variable.
In addition, to achieve the above object, the present invention also provides a kind of air conditioners, comprising:
Module is obtained, in cooling mode, when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, is obtained
Take the air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure as initial gas pressure difference
Value；
First control module adjusts the revolving speed of air-conditioner outdoor unit motor for the size according to the initial gas pressure difference
To corresponding revolving speed.
Preferably, first control module includes:
First control unit, for adjusting when the initial gas pressure difference is less than or equal to the first preset pressure difference
The revolving speed of air-conditioner outdoor unit motor is to the first revolving speed；
Second control unit, for being greater than the first preset pressure difference in the initial gas pressure difference and being less than or equal to the
When two preset pressure differences, the revolving speed of air-conditioner outdoor unit motor is adjusted to the second revolving speed；
Third control unit, for adjusting air conditioning chamber when the initial gas pressure difference is greater than the second preset pressure difference
The revolving speed of outer electromechanics machine is to third revolving speed.
Preferably, first revolving speed is less than second revolving speed, and second revolving speed is less than the third revolving speed.
Preferably, first revolving speed in 0rpm between 450rpm, second revolving speed 450rpm to 750rpm it
Between, the third revolving speed is in 750rpm between 1000rpm.
Preferably, the first acquisition module is also used to adjusting the revolving speed of air-conditioner outdoor unit motor to corresponding revolving speed,
Every prefixed time interval, the air pressure in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is obtained
Difference is as current gas pressure difference；
The control device of the air-conditioner outdoor unit motor further include:
Second control module is used for when the current gas pressure difference is less than or equal to the first preset pressure difference, will be empty
It is run after adjusting the current rotating speed of outdoor unit motor to reduce the first speed variable；And for being greater than first in the current gas pressure difference
Preset pressure difference and be less than or equal to the second preset pressure difference when, control air-conditioner outdoor unit motor run with current rotating speed；
And for when the current gas pressure difference is greater than the second preset pressure difference, the current rotating speed of air-conditioner outdoor unit motor to be increased
It is run after adding the second speed variable.
The control method of air-conditioner outdoor unit motor provided by the present invention, by according to being vented air pressure in compressor exhaust pipe
The size of initial gas pressure difference between compressor return air pipe inner return-air air pressure, by the revolving speed of air-conditioner outdoor unit motor adjust to
Corresponding revolving speed and the condensation efficiency of the condenser that changes air-conditioner outdoor unit, to adjust condensing pressure and the evaporation of the air-conditioning system
Pressure and to form normal pressure difference between the condensing pressure of the air-conditioning system and evaporating pressure, to promote the air-conditioning system
Refrigeration stability and efficiency at low ambient temperatures.
Detailed description of the invention
Fig. 1 is the flow diagram of one embodiment of control method of air-conditioner outdoor unit motor of the present invention；
Fig. 2 is the flow diagram of another embodiment of control method of air-conditioner outdoor unit motor of the present invention；
Fig. 3 is the functional block diagram of one embodiment of the air condition of that present invention；
Fig. 4 is the refinement the functional block diagram for obtaining module in Fig. 3 in air conditioner；
Fig. 5 is the refinement the functional block diagram of the first control module in air conditioner in Fig. 3；
Fig. 6 is the functional block diagram of another embodiment of the air condition of that present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of control method of air-conditioner outdoor unit motor.
Referring to Fig.1, Fig. 1 is the flow diagram of one embodiment of control method of air-conditioner outdoor unit motor of the present invention.
In one embodiment, the control method of the air-conditioner outdoor unit motor includes:
Step S10 when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, obtains pressure in cooling mode
Air pressure difference in contracting machine exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is as initial gas pressure difference；
In the present embodiment, air-conditioner outdoor unit is equipped with one for monitoring the temperature sensor of environment temperature.The air conditioner into
After entering refrigeration mode, control system receives the environment temperature that temperature sensor is monitored, and in environment temperature lower than default
When temperature, the air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is obtained as just
Beginning air pressure difference.In the present embodiment, preset temperature can be set to any one temperature value in 15 DEG C to 22 DEG C, normally, in advance
If temperature setting is 17 DEG C, when temperature sensor monitors environment temperature lower than preset temperature, the control system of air conditioner can
To determine to enter the operating condition freezed at low ambient temperatures.In the present embodiment, specifically, exhaust pipe of the air conditioner in compressor
It is equipped with the high-pressure pressure sensor for measuring exhaust air pressure, and is equipped on the muffler of compressor for measuring return-air gas
The low-pressure sensor of pressure.After the air-conditioning system enters the operating condition freezed at low ambient temperatures, control system receives high
Exhaust air pressure P measured by pressure pressure sensorIt is highWith return-air air pressure P measured by low-pressure sensorIt is low, and will exhaust
Atmospheric pressure value subtracts return-air atmospheric pressure value and obtains air pressure difference DELTA P between the two, i.e. Δ P=PIt is high-PIt is low, and will be obtained at this time
Air pressure difference DELTA P is identified as initial gas pressure difference DELTA PBegin。
Step S20, according to the size of the initial gas pressure difference, the revolving speed for adjusting air-conditioner outdoor unit motor turns to corresponding
Speed.
In the present embodiment, according to the initial gas pressure difference DELTA PBeginSize, the control system of air conditioner will be outside air conditioning chamber
The revolving speed of electromechanical machine adjusts the condensation efficiency for the condenser for changing air-conditioner outdoor unit to corresponding revolving speed, to adjust the air-conditioning system
The condensing pressure and evaporating pressure of system and to form normal pressure difference between the condensing pressure of the air-conditioning system and evaporating pressure,
To promote the refrigeration stability and efficiency of the air-conditioning system at low ambient temperatures.
In the present embodiment, further, step S20 is specifically included:
As the initial gas pressure difference DELTA PBeginWhen less than or equal to the first preset pressure difference DELTA P1, step S201 is executed；
As the initial gas pressure difference DELTA PBeginGreater than the first preset pressure difference DELTA P1 and it is less than or equal to the second preset pressure difference DELTA
When P2, step S202 is executed；As the initial gas pressure difference DELTA PBeginWhen greater than the second preset pressure difference DELTA P2, step is executed
S203:
Step S201 adjusts the revolving speed of air-conditioner outdoor unit motor to the first revolving speed；
Step S202 adjusts the revolving speed of air-conditioner outdoor unit motor to the second revolving speed；
Step S203 adjusts the revolving speed of air-conditioner outdoor unit motor to third revolving speed.
In the present embodiment, the initial gas pressure difference DELTA P is being gotBeginLater, first by the initial gas pressure difference DELTA PBegin
Compared with the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2 carries out size, the control system of the air conditioner is again
The revolving speed of air-conditioner outdoor unit motor is adjusted to revolving speed corresponding with comparison result according to comparison result.In the present embodiment, by
In as Δ PBeginWhen between 1MPa to 1.5MPa, the air-conditioning system have at low ambient temperatures good refrigeration stability and compared with
High efficiency, therefore, the first preset pressure difference DELTA P1 is typically set at 1MPa, and the second preset pressure difference DELTA P2 is typically set at
1.5MPa；Certainly, in other embodiments of the invention, the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2
Value can be normally set up in correspondence slightly to float up and down.Specifically, as Δ PBeginWhen≤1MPa, the control system of the air conditioner will be empty
It adjusts the revolving speed body of the motor of outdoor unit to adjust to the first revolving speed to run；And work as 1MPa < Δ PBeginWhen≤1.5MPa, the air conditioner
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to the second revolving speed and is run by control system；As Δ PBeginWhen > 1.5MPa, the air-conditioning
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to third revolving speed and is run by the control system of device.In the present embodiment, it is preferable that the
For one revolving speed less than the second revolving speed, the second revolving speed is less than third revolving speed, specifically, the size of the first revolving speed 0rpm to 450rpm it
Between, the size of the second revolving speed is in 450rpm between 750rpm, and the size of third revolving speed is in 750rpm between 1000rpm.
In fact, the revolving speed of the motor of air-conditioner outdoor unit is faster, the condensation efficiency of condenser is higher in air-conditioner outdoor unit.
In the present embodiment, as 1MPa < Δ PBeginWhen≤1.5MPa, the control system of the air conditioner is by the revolving speed of the motor of air-conditioner outdoor unit
Body is adjusted to the second revolving speed and is run, so that the Δ P of the air-conditioning systemBeginStablize between 1MPa to 1.5MPa, to guarantee the sky
Adjusting system has good refrigeration stability and higher efficiency at low ambient temperatures；And work as Δ PBeginWhen≤1MPa, by air-conditioning
The revolving speed body of the motor of outdoor unit is adjusted to the first revolving speed and is run, and the first revolving speed is less than the second revolving speed, and air-conditioner outdoor unit is cold at this time
The condensation efficiency of condenser obtains a degree of reduction, can play the exhaust air pressure P for increasing the air-conditioning systemIt is highWith the reduction air-conditioning
The return-air air pressure P of systemIt is lowEffect, to make Δ PBeginIncreased, have to promote the air-conditioning system at low ambient temperatures
Good refrigeration stability and higher efficiency；And work as Δ PBeginWhen > 1.5MPa, by the revolving speed body of the motor of air-conditioner outdoor unit
It adjusts to third revolving speed and runs, third revolving speed is greater than the second revolving speed, and the condensation efficiency of condenser for outdoor unit of air conditioner obtains one at this time
Determine the increase of degree, the exhaust air pressure P for reducing the air-conditioning system can be playedIt is highWith the return-air air pressure P for increasing the air-conditioning systemIt is lowWork
With to make Δ PBeginBe reduced, have to promote the air-conditioning system at low ambient temperatures good refrigeration stability and
Higher efficiency.
It is the flow diagram of another embodiment of control method of air-conditioner outdoor unit motor of the present invention referring to Fig. 2, Fig. 2.
On the basis of previous embodiment, further, the control method of the air-conditioner outdoor unit motor is after step S20
Further include:
Step S301 is obtained in compressor exhaust pipe in exhaust air pressure and compressor return air pipe every prefixed time interval
Air pressure difference between return-air air pressure is as current gas pressure difference；
And when the current gas pressure difference is less than or equal to the first preset pressure difference DELTA P1, step S302 is executed；When
When the current gas pressure difference is greater than the first preset pressure difference DELTA P1 and is less than or equal to the second preset pressure difference DELTA P2, hold
Row step S303；When the current gas pressure difference is greater than the second preset pressure difference DELTA P2, step S304 is executed:
Step S302 is run after the current rotating speed of air-conditioner outdoor unit motor is reduced the first speed variable；
Step S302, air-conditioner outdoor unit motor are run with current rotating speed；
Step S302 is run after the current rotating speed of air-conditioner outdoor unit motor is increased by the second speed variable.
In the present embodiment, according to the initial gas pressure difference DELTA PBeginSize, adjust the revolving speed of air-conditioner outdoor unit motor
To corresponding revolving speed, the control system of the air conditioner will obtain in first compression machine exhaust pipe every prefixed time interval to be vented
Air pressure difference DELTA P between air pressure and compressor return air pipe inner return-air air pressure, and the air pressure that will be obtained every prefixed time interval
Difference DELTA P is identified as current gas pressure difference DELTA PCurrently；In the present embodiment, which be can be set in 5 seconds to 15 seconds
Any one time value, normally, prefixed time interval is set as 10 seconds, with guarantee before once to air-conditioner outdoor unit motor
Revolving speed adjustment embodies the freeze at low ambient temperatures influence of stability of the air-conditioning system；Then, the control of the air conditioner
System will be according to Δ P obtained each timeCurrentlyBetween the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2
Size comparison result, further to adjust the current rotating speed of air-conditioner outdoor unit motor, specifically, as Δ PCurrentlyWhen≤1MPa, control
System processed is run after the motor for controlling the air-conditioner outdoor unit is reduced the first speed variable on the basis of current rotating speed；And work as
1MPa < Δ PCurrentlyWhen≤1.5MPa, the motor for controlling the air-conditioner outdoor unit is kept stable operation with current rotating speed by control system；
And work as Δ PCurrentlyWhen > 1.5MPa, the motor for controlling the air-conditioner outdoor unit is increased by by control system on the basis of current rotating speed
It is run after two speed variables.In the present embodiment, the size of the first speed variable in 30rpm between 80rpm, the second speed variable
Size in 30rpm between 80rpm, normally, the first speed variable and the second speed variable are disposed as 50rpm.
In the present embodiment, by obtaining a Δ P every prefixed time intervalCurrently, and by according to obtained each time
ΔPCurrentlySize comparison result between the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2 is further adjusted
The current rotating speed of whole air-conditioner outdoor unit motor, so as to be formed by pressure difference between the condensing pressure and evaporating pressure of the air-conditioning system
It is maintained between the first preset pressure difference DELTA P1 to the second preset pressure difference DELTA P2, to make the air-conditioning system in low temperature ring
Refrigeration under border has good stability and efficiency is higher.Specifically, Δ P is found after prefixed time interval each timeCurrently≤1MPa
When, it is run after the current rotating speed of air-conditioner outdoor unit motor is reduced the first speed variable, reduces air-conditioner outdoor unit motor each time
Current rotating speed can increase the exhaust air pressure P of the air-conditioning system to a certain extentIt is highWith the return-air air pressure for reducing the air-conditioning system
PIt is low, i.e., the current rotating speed of reduction air-conditioner outdoor unit motor can increase Δ P to a certain extent each timeCurrently, until 1MPa < Δ
PCurrently≤1.5MPa；And Δ P is found after prefixed time interval each timeCurrentlyWhen > 1.5MPa, by working as air-conditioner outdoor unit motor
Preceding revolving speed is run after increasing by the second speed variable, and the current rotating speed for increasing air-conditioner outdoor unit motor each time can be to a certain extent
Reduce the exhaust air pressure P of the air-conditioning systemIt is highWith the return-air air pressure P for increasing the air-conditioning systemIt is low, i.e., increase air-conditioner outdoor unit each time
Low delta p can drop in the current rotating speed of motor to a certain extentCurrently, until 1MPa < Δ PCurrently≤1.5MPa.It should be noted that working as
When the current rotating speed of air-conditioner outdoor unit motor is reduced to its minimum predetermined revolving speed, if exhaust air pressure and compression in compressor exhaust pipe
Air pressure difference DELTA P between machine muffler inner return-air air pressureCurrently(lead to still less than or equal to the first preset pressure difference DELTA P1
Often it is 1MPa), then the motor for controlling the air-conditioner outdoor unit is kept stable operation with its minimum predetermined revolving speed by control system；And it is empty
When adjusting the current rotating speed of outdoor unit motor increases to its highest preset rotation speed, if exhaust air pressure and compressor in compressor exhaust pipe
Air pressure difference DELTA P between muffler inner return-air air pressureCurrentlyThe second preset pressure difference DELTA P2 is still greater than (usually
1.5MPa), then control system by the motor for controlling the air-conditioner outdoor unit with its highest preset rotation speed keep stable operation.
The present invention further provides a kind of air conditioner, which includes air-conditioner outdoor unit.
It is the functional block diagram of one embodiment of the air condition of that present invention referring to Fig. 3, Fig. 3.
In one embodiment, which includes:
Module 10 is obtained, in cooling mode, when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature,
The air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is obtained as initial gas pressure
Difference；
First control module 20 adjusts turning for air-conditioner outdoor unit motor for the size according to the initial gas pressure difference
Speed is to corresponding revolving speed.
In the present embodiment, air-conditioner outdoor unit is equipped with one for monitoring the temperature sensor of environment temperature.Work as temperature sensing
Device monitors that (preset temperature can be set to any one temperature value in 15 DEG C to 22 DEG C to environment temperature, lead to lower than preset temperature
Chang Di, preset temperature are set as 17 DEG C) when, it can determine that the air conditioner enters the operating condition freezed at low ambient temperatures.When the sky
When device being adjusted to enter the operating condition freezed at low ambient temperatures, obtains module 10 and obtain exhaust air pressure and compressor in compressor exhaust pipe
Air pressure difference between muffler inner return-air air pressure is as initial gas pressure difference.In the present embodiment, specifically, which is being pressed
The exhaust pipe of contracting machine is equipped with the high-pressure pressure sensor for measuring exhaust air pressure, and is equipped with and uses on the muffler of compressor
In the low-pressure sensor of measurement return-air air pressure；It obtains module 10 and includes receiving unit 11 and computing unit 12 (referring to Fig. 4),
Wherein, receiving unit 11 is for receiving exhaust air pressure P measured by high-pressure pressure sensorIt is highIt is surveyed with low-pressure sensor
The return-air air pressure P measuredIt is low, computing unit 12 then subtracts return-air atmospheric pressure value and obtains gas between the two for will be vented atmospheric pressure value
Pressure difference Δ P, i.e.,
Δ P=PIt is high-PIt is low, and initial gas pressure difference DELTA P will be identified as by obtained air pressure difference DELTA P at this timeBegin。
In the present embodiment, the initial gas pressure difference DELTA P is got obtaining module 10BeginLater, the first control module 20
According to the initial gas pressure difference DELTA PBeginSize, the revolving speed of air-conditioner outdoor unit motor is adjusted to corresponding revolving speed and changes sky
Adjust outdoor unit condenser condensation efficiency, with adjust the air-conditioning system condensing pressure and evaporating pressure and make the air-conditioning system
Normal pressure difference is formed between the condensing pressure and evaporating pressure of system, to promote the refrigeration of the air-conditioning system at low ambient temperatures
Stability and efficiency.
Referring to Fig. 5, in the present embodiment, further, the first control module 20 includes:
First control unit 21, for adjusting when the initial gas pressure difference is less than or equal to the first preset pressure difference
The revolving speed of whole air-conditioner outdoor unit motor is to the first revolving speed；
Second control unit 22, for being greater than the first preset pressure difference in the initial gas pressure difference and being less than or equal to
When the second preset pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted to the second revolving speed；
Third control unit 23, for adjusting air-conditioning when the initial gas pressure difference is greater than the second preset pressure difference
The revolving speed of outdoor unit motor is to third revolving speed.
In the present embodiment, obtains module 10 and getting the initial gas pressure difference DELTA PBeginLater, by the initial gas pressure
Difference DELTA PBeginIt is sent to the first control module 20, so that the first control module 20 is by the initial gas pressure difference DELTA PBeginIt is pre- with first
If air pressure difference DELTA P1 and the second preset pressure difference DELTA P2 carry out size comparison, then first control module 20 is according to comparing
As a result the revolving speed of air-conditioner outdoor unit motor is adjusted to revolving speed corresponding with comparison result.In the present embodiment, due to working as Δ PBegin
When between 1MPa to 1.5MPa, which has good refrigeration stability and higher energy at low ambient temperatures
Effect, therefore, the first preset pressure difference DELTA P1 is typically set at 1MPa, and the second preset pressure difference DELTA P2 is typically set at
1.5MPa；Certainly, in other embodiments of the invention, the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2
Value can be normally set up in correspondence slightly to float up and down.In the present embodiment, specifically, as Δ PBeginWhen≤1MPa, the first control is single
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to the first revolving speed and is run by member 21；And work as 1MPa < Δ PBeginWhen≤1.5MPa, the
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to the second revolving speed and is run by two control units 22；As Δ PBeginWhen > 1.5MPa, the
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to third revolving speed and is run by three control units 23.In the present embodiment, it is preferable that the
For one revolving speed less than the second revolving speed, the second revolving speed is less than third revolving speed, specifically, the size of the first revolving speed 0rpm to 450rpm it
Between, the size of the second revolving speed is in 450rpm between 750rpm, and the size of third revolving speed is in 750rpm between 1000rpm.
In fact, the revolving speed of the motor of air-conditioner outdoor unit is faster, the condensation efficiency of condenser is higher in air-conditioner outdoor unit.
In the present embodiment, as 1MPa < Δ PBeginWhen≤1.5MPa, the second control unit 22 is by the revolving speed body tune of the motor of air-conditioner outdoor unit
It is whole to the second revolving speed run so that the air-conditioning system Δ P stablize between 1MPa to 1.5MPa, to guarantee the air-conditioning system
There is good refrigeration stability and higher efficiency at low ambient temperatures；And work as Δ PBeginWhen≤1MPa, first control unit
The revolving speed body of the motor of air-conditioner outdoor unit is adjusted to the first revolving speed and is run by 21, and the first revolving speed is less than the second revolving speed, air-conditioning at this time
The condensation efficiency of outdoor condenser obtains a degree of reduction, can play the exhaust air pressure P for increasing the air-conditioning systemIt is highAnd drop
The return-air air pressure P of the low air-conditioning systemIt is lowEffect, to make Δ PBeginIncreased, to promote the air-conditioning system in low temperature ring
There is good refrigeration stability and higher efficiency under border；And work as Δ PBeginWhen > 1.5MPa, third control unit 23 will be empty
It adjusts the revolving speed body of the motor of outdoor unit to adjust to third revolving speed to run, third revolving speed is greater than the second revolving speed, at this time air-conditioner outdoor unit
The condensation efficiency of condenser obtains a degree of increase, can play the exhaust air pressure P for reducing the air-conditioning systemIt is highWith the increase sky
The return-air air pressure P of adjusting systemIt is lowEffect, to make Δ PBeginBe reduced, have at low ambient temperatures to promote the air-conditioning system
There are good refrigeration stability and higher efficiency.
Referring to the functional module signal that Fig. 6, Fig. 6 are another embodiment of control device of air-conditioner outdoor unit motor of the present invention
Figure.
On the basis of previous embodiment, further, module 10 is obtained, is also used to turn by air-conditioner outdoor unit motor
After whole to the corresponding revolving speed of velocity modulation, every prefixed time interval, exhaust air pressure and compressor return air in compressor exhaust pipe are obtained
Air pressure difference between pipe inner return-air air pressure is as current gas pressure difference；
The control device of the air-conditioner outdoor unit motor further include:
Second control module 30 is used for when the current gas pressure difference is less than or equal to the first preset pressure difference, will
The current rotating speed of air-conditioner outdoor unit motor is run after reducing the first speed variable；And for being greater than the in the current gas pressure difference
One preset pressure difference and be less than or equal to the second preset pressure difference when, control air-conditioner outdoor unit motor transported with current rotating speed
Row；And for when the current gas pressure difference is greater than the second preset pressure difference, air-conditioner outdoor unit motor to be worked as forward
Speed is run after increasing by the second speed variable.
In the present embodiment, in the first control module 10 according to the initial gas pressure difference DELTA PBeginSize, adjust air conditioning chamber
After the revolving speed to corresponding revolving speed of outer electromechanics machine, obtains module 10 and also obtain first compression machine exhaust pipe every prefixed time interval
Air pressure difference DELTA P between interior exhaust air pressure and compressor return air pipe inner return-air air pressure, and will be obtained every prefixed time interval
Δ P be identified as current gas pressure difference DELTA PCurrently；In the present embodiment, which be can be set in 5 seconds to 15 seconds
Any one time value, normally, prefixed time interval are set as 10 seconds, once to turn to air-conditioner outdoor unit motor before guarantee
Velocity modulation is whole to embody the freeze at low ambient temperatures influence of stability of the air-conditioning system；Then, the second control module 30 will
According to Δ P obtained each timeCurrentlyWith the size between the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2
Comparison result, further to adjust the current rotating speed of air-conditioner outdoor unit motor, specifically, as Δ PCurrentlyWhen≤1MPa, the second control
Module 30 is run after the motor for controlling the air-conditioner outdoor unit is reduced the first speed variable on the basis of current rotating speed；And work as
1MPa < Δ PCurrentlyWhen≤1.5MPa, the motor for controlling the air-conditioner outdoor unit is kept steady with current rotating speed by the second control module 30
Fixed operation；And work as Δ PCurrentlyWhen > 1.5MPa, the second control module 30 will control the motor of the air-conditioner outdoor unit in current rotating speed
On the basis of increase by the second speed variable after run.In the present embodiment, the size of the first speed variable in 30rpm between 80rpm,
The size of second speed variable is in 30rpm between 80rpm, and normally, the first speed variable is respectively provided with the second speed variable
For 50rpm.
In the present embodiment, a Δ P is obtained every prefixed time interval by obtaining module 10Currently, and pass through the second control
Module 30 is according to Δ P obtained each timeCurrentlyBetween the first preset pressure difference DELTA P1 and the second preset pressure difference DELTA P2
Size comparison result further adjust the current rotating speed of air-conditioner outdoor unit motor so that the condensing pressure of the air-conditioning system and
Pressure difference is formed by between evaporating pressure to be maintained between the first preset pressure difference DELTA P1 to the second preset pressure difference DELTA P2,
To make, the refrigeration of the air-conditioning system at low ambient temperatures has good stability and efficiency is higher.Specifically, it is preset when each time
Δ P is found after time intervalCurrentlyWhen≤1MPa, the current rotating speed of air-conditioner outdoor unit motor is reduced by first by the second control module 30
It is run after speed variable, the current rotating speed for reducing air-conditioner outdoor unit motor each time can increase the air-conditioning system to a certain extent
Exhaust air pressure PIt is highWith the return-air air pressure P for reducing the air-conditioning systemIt is low, i.e., the current rotating speed of air-conditioner outdoor unit motor is reduced each time
Δ P can be increased to a certain extentCurrently, until 1MPa < Δ PCurrently≤1.5MPa；And it is found after prefixed time interval each time
ΔPCurrentlyWhen > 1.5MPa, the second control module 30 is transported after the current rotating speed of air-conditioner outdoor unit motor is increased by the second speed variable
Row, the current rotating speed for increasing air-conditioner outdoor unit motor each time can reduce the exhaust air pressure P of the air-conditioning system to a certain extentIt is high
With the return-air air pressure P for increasing the air-conditioning systemIt is low, i.e., the current rotating speed for increasing air-conditioner outdoor unit motor each time can be to a certain degree
Upper drop low delta pCurrently, until 1MPa < Δ PCurrently≤1.5MPa.It should be noted that the current rotating speed when air-conditioner outdoor unit motor drops
When as low as its minimum predetermined revolving speed, if the gas in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure
Pressure difference Δ PCurrentlyStill less than or be equal to the first preset pressure difference DELTA P1 (usually 1MPa), then the second control module 30
The motor for controlling the air-conditioner outdoor unit is kept into stable operation with its minimum predetermined revolving speed；And air-conditioner outdoor unit motor works as forward
When speed increases to its highest preset rotation speed, if in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure
Air pressure difference DELTA PCurrentlyThe second preset pressure difference DELTA P2 (usually 1.5MPa) is still greater than, then the second control module 30 will
It controls the motor of the air-conditioner outdoor unit and stable operation is kept with its highest preset rotation speed.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of control method of air-conditioner outdoor unit motor, which is characterized in that the control method packet of the air-conditioner outdoor unit motor
Include following steps:
In cooling mode, it when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, obtains in compressor exhaust pipe
The air pressure difference between air pressure and compressor return air pipe inner return-air air pressure is vented as initial gas pressure difference；
According to the size of the initial gas pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted to corresponding revolving speed；
Every prefixed time interval, obtain in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure
Air pressure difference is as current gas pressure difference；
When the current gas pressure difference is less than or equal to the first preset pressure difference, by the current rotating speed of air-conditioner outdoor unit motor
It is run after reducing the first speed variable；
When the current gas pressure difference is greater than the first preset pressure difference and is less than or equal to the second preset pressure difference, air-conditioning
Outdoor unit motor is run with current rotating speed；
When the current gas pressure difference is greater than the second preset pressure difference, the current rotating speed of air-conditioner outdoor unit motor is increased by the
It is run after two speed variables；
Wherein, when the current rotating speed of air-conditioner outdoor unit motor is reduced to minimum predetermined revolving speed, if exhaust in compressor exhaust pipe
Air pressure difference between air pressure and compressor return air pipe inner return-air air pressure is less than or equal to the first preset pressure difference, outside air conditioning chamber
Electromechanical machine is with the operation of minimum predetermined revolving speed；When the current rotating speed of air-conditioner outdoor unit motor increases to highest preset rotation speed, if pressure
It is poor that air pressure difference in contracting machine exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is greater than the second preset pressure
Value, air-conditioner outdoor unit motor is with the operation of highest preset rotation speed.
2. the control method of air-conditioner outdoor unit motor as described in claim 1, which is characterized in that described according to the initial gas
The size of pressure difference, adjusting the revolving speed of air-conditioner outdoor unit motor to the step of corresponding revolving speed includes:
When the initial gas pressure difference is less than or equal to the first preset pressure difference, the revolving speed of air-conditioner outdoor unit motor is adjusted extremely
First revolving speed；
When the initial gas pressure difference is greater than the first preset pressure difference and is less than or equal to the second preset pressure difference, adjustment
The revolving speed of air-conditioner outdoor unit motor is to the second revolving speed；
When the initial gas pressure difference is greater than the second preset pressure difference, revolving speed to the third for adjusting air-conditioner outdoor unit motor turns
Speed.
3. the control method of air-conditioner outdoor unit motor as claimed in claim 1 or 2, which is characterized in that first revolving speed is small
In second revolving speed, second revolving speed is less than the third revolving speed.
4. the control method of air-conditioner outdoor unit motor as claimed in claim 3, which is characterized in that first revolving speed is in 0rpm
To between 450rpm, second revolving speed in 450rpm between 750rpm, the third revolving speed 750rpm to 1000rpm it
Between.
5. a kind of air conditioner, which is characterized in that the air conditioner includes:
Module is obtained, in cooling mode, when the environment temperature locating for the air-conditioner outdoor unit is lower than preset temperature, obtains pressure
Air pressure difference in contracting machine exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is as initial gas pressure difference, institute
It states and obtains module and be also used to adjusting the revolving speed of air-conditioner outdoor unit motor to corresponding revolving speed, every prefixed time interval,
The air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is obtained as current gas pressure
Difference；
First control module adjusts the revolving speed of air-conditioner outdoor unit motor to right for the size according to the initial gas pressure difference
Answer revolving speed；
Second control module is used for when the current gas pressure difference is less than or equal to the first preset pressure difference, by air conditioning chamber
The current rotating speed of outer electromechanics machine is run after reducing the first speed variable；And it is default for being greater than first in the current gas pressure difference
Air pressure difference and be less than or equal to the second preset pressure difference when, control air-conditioner outdoor unit motor run with current rotating speed；And
For when the current gas pressure difference is greater than the second preset pressure difference, the current rotating speed of air-conditioner outdoor unit motor is increased by the
It is run after two speed variables；
Wherein, second control module is also used to be reduced to minimum predetermined revolving speed when the current rotating speed of air-conditioner outdoor unit motor
When, if the air pressure difference in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure is less than or equal to the
One preset pressure difference controls air-conditioner outdoor unit motor with the operation of minimum predetermined revolving speed；Work as forward when air-conditioner outdoor unit motor
When speed increases to highest preset rotation speed, if in compressor exhaust pipe between exhaust air pressure and compressor return air pipe inner return-air air pressure
Air pressure difference is greater than the second preset pressure difference, controls air-conditioner outdoor unit motor with the operation of highest preset rotation speed.
6. air conditioner as claimed in claim 5, which is characterized in that first control module includes:
First control unit, for adjusting air-conditioning when the initial gas pressure difference is less than or equal to the first preset pressure difference
The revolving speed of outdoor unit motor is to the first revolving speed；
Second control unit, for being greater than the first preset pressure difference in the initial gas pressure difference and being less than or equal to second in advance
If when air pressure difference, adjusting the revolving speed of air-conditioner outdoor unit motor to the second revolving speed；
Third control unit, for adjusting air-conditioner outdoor unit when the initial gas pressure difference is greater than the second preset pressure difference
The revolving speed of motor is to third revolving speed.
7. such as air conditioner described in claim 5 or 6, which is characterized in that first revolving speed is less than second revolving speed, described
Second revolving speed is less than the third revolving speed.
8. air conditioner as claimed in claim 7, which is characterized in that first revolving speed in 0rpm between 450rpm, it is described
Second revolving speed is in 450rpm between 750rpm, and the third revolving speed is in 750rpm between 1000rpm.
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| CN201510283017.7A CN106288130B (en) | 2015-05-28 | 2015-05-28 | The control method and air conditioner of air-conditioner outdoor unit motor |
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| CN108006890B (en) * | 2017-11-03 | 2020-10-09 | 特灵空调系统(中国)有限公司 | Air conditioner heat dissipation control method, air conditioner heat dissipation control device and air conditioner |
| CN111895627B (en) * | 2020-07-14 | 2022-01-04 | Tcl空调器(中山)有限公司 | Air conditioner outdoor fan rotating speed control method, air conditioner and storage medium |
| CN112665161B (en) * | 2020-12-08 | 2022-02-18 | 珠海格力电器股份有限公司 | Screw unit control method and device and air conditioning unit |
| CN114234406A (en) * | 2021-12-22 | 2022-03-25 | 四川长虹空调有限公司 | Air conditioner refrigeration control method |
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|---|---|---|---|---|
| JP2002039598A (en) * | 2000-07-26 | 2002-02-06 | Daikin Ind Ltd | Air conditioner |
| CN1643306A (en) * | 2002-03-29 | 2005-07-20 | 大金工业株式会社 | Air conditioner |
| JP2013083425A (en) * | 2011-09-30 | 2013-05-09 | Fujitsu General Ltd | Air conditioner |
| CN103759345A (en) * | 2014-02-21 | 2014-04-30 | 广东志高暖通设备股份有限公司 | Draught fan control method |
| CN103982990A (en) * | 2014-06-04 | 2014-08-13 | 深圳麦克维尔空调有限公司 | Method for controlling draught fan in air conditioner outdoor unit and air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002039598A (en) * | 2000-07-26 | 2002-02-06 | Daikin Ind Ltd | Air conditioner |
| CN1643306A (en) * | 2002-03-29 | 2005-07-20 | 大金工业株式会社 | Air conditioner |
| JP2013083425A (en) * | 2011-09-30 | 2013-05-09 | Fujitsu General Ltd | Air conditioner |
| CN103759345A (en) * | 2014-02-21 | 2014-04-30 | 广东志高暖通设备股份有限公司 | Draught fan control method |
| CN103982990A (en) * | 2014-06-04 | 2014-08-13 | 深圳麦克维尔空调有限公司 | Method for controlling draught fan in air conditioner outdoor unit and air conditioning system |
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