CN110006140A - Control method and air-cooled magnetic suspension unit for air-cooled magnetic suspension unit - Google Patents
Control method and air-cooled magnetic suspension unit for air-cooled magnetic suspension unit Download PDFInfo
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- CN110006140A CN110006140A CN201910160996.5A CN201910160996A CN110006140A CN 110006140 A CN110006140 A CN 110006140A CN 201910160996 A CN201910160996 A CN 201910160996A CN 110006140 A CN110006140 A CN 110006140A
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- Prior art keywords
- pressure
- preset
- unit
- expulsion
- pressure ratio
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
Abstract
The invention belongs to air-conditioner set technical fields, it is intended to solve the problems, such as that existing air-cooled magnetic suspension unit uses multiple structures for determining frequency blower that can not neatly adjust unit pressure ratio and easily leads to unit disorderly closedown and the cost of unit can be made to increase substantially using multiple frequency conversion fans.For this purpose, the present invention provides a kind of control method for air-cooled magnetic suspension unit and air-cooled magnetic suspension unit, the air-cooled magnetic suspension unit include it is multiple determine frequency blower, which includes: to obtain the pressure at expulsion and pressure ratio of unit；According at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop.The present invention can make set steady, reliably run, and improve the stability of unit, and the cost of air-cooled magnetic suspension unit is greatly lowered, and meet the use demand of user.
Description
Technical field
The invention belongs to air-conditioner set technical fields, specifically provide a kind of control method for air-cooled magnetic suspension unit and
Air-cooled magnetic suspension unit.
Background technique
Frequency blower or multiple frequency conversion fans generally are determined using multiple in current air-cooling magnetic suspension Central air-conditioning unit
Structure, when using it is multiple determine frequency blower when, a kind of control mode be it is all determine frequency blower and open together with stopping, this just will appear unit and exists
Easily there is the too small situation of pressure ratio when running under the conditions of circumstance temperature is lower, unit can not be adjusted in time, so as to cause unit failure
Shut down, be to determine frequency blower by all and be divided into two groups there are also a kind of control mode, then start-up phase can be by closing one group
Pressure ratio is adjusted in blower, however the control precision of this control mode is lower, and may cause pressure ratio in shutdown process
It fluctuates larger, can also make unit disorderly closedown；When the multiple frequency conversion fans of use, control mode is that same open is stopped together, can be right
The pressure ratio of unit is neatly adjusted, and is guaranteed that unit can steadily be run under each operating condition, however is used multiple changes
Frequency blower can be such that the cost of entire unit increases substantially, and later period maintenance cost of upkeep is also higher.
Therefore, this field needs a kind of new control method and corresponding air-cooled magnetic suspension for air-cooled magnetic suspension unit
Unit solves the above problems.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve existing air-cooled magnetic suspension unit using multiple fixed frequencies
The structure of blower can not neatly be adjusted unit pressure ratio and easily lead to unit disorderly closedown and can be made using multiple frequency conversion fans
The problem of cost of unit increases substantially, the present invention provides a kind of control method for air-cooled magnetic suspension unit, the wind
Cold magnetic suspension unit include it is multiple determine frequency blower, the control method include: obtain unit pressure at expulsion and pressure ratio；According to exhaust
At least one of pressure and pressure ratio, selectively frequency blower is determined in start and stop.
In the optimal technical scheme of above-mentioned control method, " according at least one of pressure at expulsion and pressure ratio, selectivity
Frequency blower is determined in ground start and stop " the step of specifically include: if pressure ratio less than the first preset value, make at least one determine frequency blower stopping
Operation.
In the optimal technical scheme of above-mentioned control method, " if pressure ratio less than the first preset value, makes at least one fixed
Frequency blower is out of service " the step of further comprise: if pressure ratio is less than the first preset value and continues the first preset time, make
One to determine frequency blower out of service.
In the optimal technical scheme of above-mentioned control method, " according at least one of pressure at expulsion and pressure ratio, selectivity
Frequency blower is determined in ground start and stop " the step of further include: if pressure ratio is greater than or equal to the first preset value and less than the second preset value, and
Pressure at expulsion then makes at least one determine frequency blower out of service less than the first preset pressure, wherein the second preset value is greater than first
Preset value.
In the optimal technical scheme of above-mentioned control method, " if pressure ratio is greater than or equal to the first preset value and less than the
The step of two preset values, and pressure at expulsion then makes at least one determine frequency blower out of service less than the first preset pressure ", is into one
If step includes: that pressure ratio is greater than or equal to the first preset value and less than the second preset value and continues the second preset time, and arranges
Atmospheric pressure is less than the first preset pressure and continues third preset time, then making one, to determine frequency blower out of service.
In the optimal technical scheme of above-mentioned control method, " according at least one of pressure at expulsion and pressure ratio, selectivity
Frequency blower is determined in ground start and stop " the step of further include: if pressure ratio is greater than or equal to the second preset value, and pressure at expulsion is greater than or waits
In the second preset pressure and it is less than third preset pressure, then at least one is made to determine the starting operation of frequency blower, wherein the second default pressure
Power is greater than the first preset pressure, and third preset pressure is greater than the second preset pressure.
In the optimal technical scheme of above-mentioned control method, " if pressure ratio is greater than or equal to the second preset value, and it is vented
Pressure is greater than or equal to the second preset pressure and is less than third preset pressure, then at least one is made to determine frequency blower starting operation "
Step further comprises: if pressure ratio is greater than or equal to the second preset value and continues the 4th preset time, and pressure at expulsion is big
In or equal to the second preset pressure and it is less than third preset pressure and continues the 5th preset time, then makes one to determine the starting of frequency blower
Operation.
In the optimal technical scheme of above-mentioned control method, " according at least one of pressure at expulsion and pressure ratio, selectivity
Frequency blower is determined in ground start and stop " the step of further include: if pressure at expulsion is greater than or equal to third preset pressure, keep at least one fixed
The starting operation of frequency blower.
In the optimal technical scheme of above-mentioned control method, " if pressure at expulsion is greater than or equal to third preset pressure,
So that at least one is determined frequency blower starting operation " the step of further comprise: if pressure at expulsion is greater than or equal to the default pressure of third
Power and continue the 6th preset time, then makes one to determine the starting operation of frequency blower.
On the other hand, the present invention also provides a kind of air-cooled magnetic suspension unit, air-cooled magnetic suspension unit includes controller,
Controller is configured to execute above-mentioned control method.
It will be appreciated to those of skill in the art that first obtaining the exhaust of unit in the preferred technical solution of the present invention
Then pressure and pressure ratio determine frequency blower by least one of the pressure at expulsion of unit and pressure ratio come selectively start and stop, lead to
Such setting is crossed, makes have multiple air-cooled magnetic suspension units for determining frequency blower also can be neatly under the conditions of circumstance temperature is lower
Its pressure ratio is adjusted, avoids unit pressure ratio too small or the larger and disorderly closedown of pressure ratio fluctuation, makes set steady, reliably runs,
The stability of unit is improved, and compared to the air-cooled magnetic suspension unit with multiple frequency conversion fans, air-cooled magnetcisuspension of the invention
The cost of floating unit is lower, and later period maintenance cost of upkeep is relatively low.
Further, in the pressure ratio of unit very hour, by stopping a part of blower, the pressure ratio of unit can be improved,
It avoids the pressure ratio of unit too small, so that unit be avoided to break down shutdown, and unit is enable to stablize, reliably run, thus
Improve the stability of unit.
Further, it in the pressure ratio of unit and all smaller pressure at expulsion, by stopping a part of blower, can be improved
The pressure ratio and pressure at expulsion of unit, avoid the pressure ratio of unit and pressure at expulsion too small, so that unit is avoided to break down shutdown, and
Unit is set to stablize, reliably run, to improve the stability of unit.
Further, it in the pressure ratio of unit and all bigger pressure at expulsion, by starting a part of blower, can reduce
The pressure ratio and pressure at expulsion of unit avoid the pressure ratio of unit and pressure at expulsion fluctuation larger, stop so that unit be avoided to break down
Machine, and unit is enable to stablize, reliably run, to improve the stability of unit.
Further, when the pressure at expulsion of unit is very big, by starting a part of blower, the row of unit can be reduced
Atmospheric pressure avoids the pressure at expulsion of unit from fluctuating larger, so that unit is avoided to break down shutdown, and unit is enable to stablize,
It reliably runs, to improve the stability of unit.
In addition, the air-cooled magnetic suspension unit that the present invention provides based on the above technical solution is above-mentioned due to being able to carry out
Control method, and then have the technical effect that above-mentioned control method has, and compared to the air-cooled magnetcisuspension before improvement
Floating unit, air-cooled magnetic suspension unit of the invention can not only improve the stability of unit operation, unit prevented to be frequent
Disorderly closedown, but also the cost of air-cooled magnetic suspension unit is greatly lowered, meet the use demand of user.
Detailed description of the invention
Fig. 1 is the flow chart of the control method of air-cooled magnetic suspension unit of the invention.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.
It should be noted that in the description of the present invention, term " first ", " second ", " third ", " the 4th ", " the 5th "
" the 6th " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
The existing air-cooled magnetic suspension unit pointed out based on background technique can not be neatly using multiple structures for determining frequency blower
It adjusts unit pressure ratio and easily leads to unit disorderly closedown and the cost of unit can be made to increase substantially using multiple frequency conversion fans
The problem of, the present invention provides a kind of control methods for air-cooled magnetic suspension unit and air-cooled magnetic suspension unit, it is intended to make machine
Group is stablized, is reliably run, and improves the stability of unit, and the cost of air-cooled magnetic suspension unit is greatly lowered, and meets
The use demand of user.
Specifically, air-cooled magnetic suspension unit of the invention include controller and it is multiple determine frequency blower, controller is able to carry out
Whole control logics of unit, comprising control method of the invention, as shown in Figure 1, control method of the invention includes: acquisition machine
The pressure at expulsion and pressure ratio of group；According at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop.Wherein,
The pressure at expulsion of unit is the pressure at expulsion of the compressor of air-cooled magnetic suspension unit, and the pressure ratio of unit is the pressure ratio of compressor, should
Pressure ratio is the pressure at expulsion of compressor and the ratio of admission pressure.Furthermore, it is possible to only by the pressure at expulsion of unit come selectivity
Frequency blower is determined in ground start and stop, only can also determine frequency blower by the pressure ratio of unit come selectively start and stop, and can pass through machine simultaneously
The pressure at expulsion and pressure ratio of group carry out selectively start and stop and determine frequency blower, and those skilled in the art can in practical applications neatly
The condition for judging whether that frequency blower is determined in start and stop is set, as long as using at least one of pressure at expulsion and pressure ratio of unit to sentence
Breaking, whether frequency blower is determined in start and stop all belongs to the scope of protection of the present invention.
Preferably, the step of " according at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop " has
If body includes: pressure ratio less than the first preset value, at least one is set to determine frequency blower out of service.Setting in this way, can
Too small to avoid the pressure ratio of unit, i.e., in the pressure ratio of unit very hour, unit easily breaks down shutdown at this time, can be by making
Frequency blower mode out of service is determined to improve the pressure ratio of unit, wherein can making one, to determine frequency blower out of service, can be with
Make it is multiple determine that frequency blower is out of service, those skilled in the art can be in practical applications according to the concrete condition of unit and fixed
The total number of frequency blower determines the closing quantity of frequency blower, the adjustment and change of this quantity for determining frequency blower to flexibly set
It is not construed as limiting the invention, should all limit within protection scope of the present invention.It is further preferred that among the above " if
Pressure ratio then makes at least one determine frequency blower out of service less than the first preset value " the step of further comprise: if pressure ratio is less than
First preset value and continue the first preset time, then making one, to determine frequency blower out of service.That is, the pressure ratio of unit is not only
Need to be less than the first preset value, it is also necessary to meet and continues the condition of the first preset time can just to make to determine frequency blower out of service,
And, it is preferred that the case is making one to determine every time, frequency blower is out of service, thus guarantee unit pressure ratio will not it is too small and
Very big fluctuation will not occur in the pressure ratio of unit, guarantee the normal refrigeration of unit, and will not make leaving water temperature generate compared with
Big fluctuation, to will not influence the normal use of user.Among the above, the first preset time can be 3 minutes, can also be
4 minutes or 5 minutes, those skilled in the art can flexibly set the specific time of the first preset time in practical applications
Value, the adjustment and change of this first preset time specific value are not construed as limiting the invention, and should all be limited to the present invention
Protection scope within.
Preferably, the step of " according at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop " is gone back
If including: pressure ratio more than or equal to the first preset value and less than the second preset value, and pressure at expulsion is less than the first default pressure
Power then makes at least one determine frequency blower out of service, wherein the second preset value is greater than the first preset value.Setting in this way,
I.e. if when the pressure ratio of unit is smaller and the pressure at expulsion of unit is also smaller, can by make to determine frequency blower it is out of service come
Improve the pressure ratio of unit, that is to say, that though the pressure ratio of unit very small, but when exhaust pressure ratio is lesser, machine
Group still should improve the pressure ratio of unit by way of closing a part and determining frequency blower in principle, on the whole, if machine
When pressure ratio very small (pressure ratio of i.e. aforementioned middle unit is less than the first preset value) of group, it is not necessary that sentencing for pressure size is exhausted
It is disconnected, at this time unit have due to the pressure ratio of unit is too small and the risk of disorderly closedown, and the pressure ratio of unit is very small, but compares
When smaller (pressure ratio of i.e. aforementioned middle unit is greater than or equal to the first preset value and less than the second preset value), need to combine exhaust pressure
Power is combined judgement, when pressure at expulsion is also smaller, illustrate unit still and have due to the pressure ratio of unit is too small and failure is stopped
The risk of machine, control logic in this way can make to pass through closing a part when the risk of the faulty shutdown of unit immediately calmly
The mode of frequency blower promotes the pressure ratio of unit, and unit is avoided to break down shutdown.In addition, with it is aforementioned similarly, in unit
Pressure ratio is greater than or equal to the first preset value and less than the second preset value, and when pressure at expulsion is less than the first preset pressure, can be with
Making one, to determine frequency blower out of service, can also make multiple to determine that frequency blower is out of service, and those skilled in the art can be in reality
According to the concrete condition of unit and determine the total number of frequency blower in and flexibly set the closing quantity for determining frequency blower,
The adjustment and change of this quantity for determining frequency blower are not construed as limiting the invention, and should all be limited to protection scope of the present invention
Within.It is further preferred that " if pressure ratio is greater than or equal to the first preset value and less than the second preset value, and arranging among the above
Atmospheric pressure then makes at least one determine frequency blower out of service less than the first preset pressure " the step of further comprise: if pressure ratio
More than or equal to the first preset value and less than the second preset value and continue the second preset time, and pressure at expulsion is pre- less than first
If pressure and continuing third preset time, then making one, to determine frequency blower out of service.That is, the pressure ratio of unit not only needs
More than or equal to the first preset value and less than the second preset value, it is also necessary to meet the condition for continuing the second preset time, in addition, machine
The pressure at expulsion of group also needs to be less than the first preset pressure, while also needing to meet the condition of lasting third preset time just can be with
It is out of service to make to determine frequency blower, and, it is preferred that the case is making one every time, to determine frequency blower out of service, to guarantee unit
Pressure ratio will not too small and unit pressure ratio very big fluctuation will not occur, guarantee the normal refrigeration of unit, and not
Leaving water temperature can be made to generate biggish fluctuation, to will not influence the normal use of user.Among the above, the second preset time and
Third preset time can be 3 minutes, can also be 4 minutes or 5 minutes, those skilled in the art can be clever in practical applications
The specific time value of second preset time and third preset time, this second preset time and default third are set livingly when
Between specific value adjustment and change be not construed as limiting the invention, should all limit within protection scope of the present invention.
Preferably, the step of " according at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop " is gone back
If including: that pressure ratio is greater than or equal to the second preset value, and pressure at expulsion is greater than or equal to the second preset pressure and less than the
Three preset pressures then make at least one determine the starting operation of frequency blower, wherein and the second preset pressure is greater than the first preset pressure, the
Three preset pressures are greater than the second preset pressure.On the basis of aforementioned schemes, if the pressure ratio of unit is bigger and the row of unit
When atmospheric pressure is also bigger, illustrate that the fluctuation of unit at this time is larger, it should make unit by way of opening and determining frequency blower
Pressure ratio and pressure at expulsion lower, wherein one can be made to determine the starting operation of frequency blower, can also make multiple to determine frequency blower and open
Dynamic operation, those skilled in the art according to the concrete condition of unit and can determine the total number of frequency blower in practical applications
Flexibly set the starting quantity for determining frequency blower, the adjustment of this quantity for determining frequency blower and change is not constituted to of the invention
Limitation, should all limit within protection scope of the present invention.It is further preferred that among the above " if pressure ratio is greater than or equal to the
Two preset values, and pressure at expulsion is greater than or equal to the second preset pressure and is less than third preset pressure, then makes at least one fixed
Frequency blower starting operation " the step of further comprise: if pressure ratio be greater than or equal to the second preset value and continue the 4th it is default when
Between, and pressure at expulsion is greater than or equal to the second preset pressure and is less than third preset pressure and continues the 5th preset time, then
One is set to determine the starting operation of frequency blower.That is, the pressure ratio of unit not only needs to be greater than the second preset value, it is also necessary to which satisfaction is held
The condition of continuous 4th preset time, in addition, the pressure at expulsion of unit also needs to be greater than or equal to the second preset pressure and less than the
Three preset pressures, while the condition for also needing satisfaction to continue the 5th preset time can just make to determine the starting operation of frequency blower, also,
Preferred situation is to make to determine the starting operation of frequency blower every time, to guarantee that the pressure ratio of unit and pressure at expulsion are not too big
And very big fluctuation will not occur in the pressure ratio of unit, guarantee the normal refrigeration of unit, and leaving water temperature will not be made to produce
Raw biggish fluctuation, to will not influence the normal use of user.Among the above, the 4th preset time and the 5th preset time can
Think 3 minutes, can also be 4 minutes or 5 minutes, it is pre- that those skilled in the art can flexibly set the 4th in practical applications
If the specific time value of time and the 5th preset time, the tune of this 4th preset time and the 5th preset time specific value
Whole and change is not construed as limiting the invention, and should all be limited within protection scope of the present invention.
Preferably, the step of " according at least one of pressure at expulsion and pressure ratio, selectively frequency blower is determined in start and stop " is gone back
If including: that pressure at expulsion is greater than or equal to third preset pressure, at least one is made to determine the starting operation of frequency blower.In this way
Setting, can be excessive to avoid the pressure at expulsion of unit, i.e., can be by making to determine frequency wind when the pressure at expulsion of unit is very big
Machine starting operation reduces the pressure at expulsion of unit, that is to say, that when the pressure ratio of unit is bigger, and pressure at expulsion also compares
When big, unit should reduce the pressure at expulsion of unit by way of starting a part and determining frequency blower, on the whole, such as
When the pressure at expulsion of fruit unit very big (pressure at expulsion of i.e. aforementioned middle unit is greater than or equal to third preset pressure), without into
The judgement of row pressure ratio size, unit has since the pressure at expulsion of unit is excessive and the risk of disorderly closedown at this time, and the row of unit
Atmospheric pressure is without very big, but bigger (pressure at expulsion of i.e. aforementioned middle unit is greater than or equal to the second preset pressure and small
In third preset pressure) when, need that pressure ratio is combined to be combined judgement, when pressure ratio is also bigger, illustrate unit still and have by
In the pressure at expulsion of unit, excessive and disorderly closedown risk, control logic in this way can make the faulty shutdown of unit
Risk when reduce the pressure at expulsion of unit by way of starting a part and determining frequency blower immediately, avoid unit from breaking down
It shuts down.In addition, with it is aforementioned similarly, when the pressure at expulsion of unit is greater than or equal to third preset pressure, can make one it is fixed
The starting operation of frequency blower, can also make it is multiple determine the starting of frequency blower and run, those skilled in the art can root in practical applications
According to unit concrete condition and determine the total number of frequency blower and flexibly set the starting quantity for determining frequency blower, this fixed frequency
The adjustment and change of the quantity of blower are not construed as limiting the invention, and should all be limited within protection scope of the present invention.Into
One step preferably, " if pressure at expulsion is greater than or equal to third preset pressure, makes at least one determine the starting of frequency blower among the above
The step of operation ", further comprises: if pressure at expulsion is greater than or equal to third preset pressure and continues the 6th preset time,
One is set to determine the starting operation of frequency blower.That is, the exhaust of unit not only needs to be greater than or equal to third preset pressure, also need
The condition for meeting lasting 6th preset time can just make to determine the starting operation of frequency blower, and, it is preferred that the case is every time
One is set to determine the starting operation of frequency blower, to guarantee that the pressure at expulsion of unit is not too big, and the pressure ratio of unit will not go out
Existing very big fluctuation, guarantees the normal refrigeration of unit, and leaving water temperature will not be made to generate biggish fluctuation, thus will not shadow
Ring the normal use of user.Among the above, the 6th preset time can be 3 minutes, can also be 4 minutes or 5 minutes, this field
Technical staff can flexibly set the specific time value of the 6th preset time, this 6th preset time tool in practical applications
The adjustment and change of body numerical value are not construed as limiting the invention, and should all be limited within protection scope of the present invention.
In addition, in the present invention, it is aforementioned in the first preset value, the second preset value, the first preset pressure, the second default pressure
Power and third preset pressure can be the test value that those skilled in the art obtain according to test, be also possible to rule of thumb obtain
Empirical value, those skilled in the art can flexibly set the first preset value, the second preset value, first pre- in practical applications
If the specific value of pressure, the second preset pressure and third preset pressure, as long as passing through the first preset value and the second preset value
The pressure at expulsion boundary of determining pressure ratio separation and the first preset pressure, the second preset pressure and the determination of third preset pressure
Point, which can determine that unit start, to be determined frequency fan operation, stops determine frequency fan operation and still remain current determining frequency blower and grasp
Work.
Technical solution of the present invention is illustrated below with reference to a specific embodiment.
Preferably, the reference value Pr1 and Pr2 (Pr1 < Pr2) of two unit pressure ratios, i.e., the first preset value above-mentioned are set
With the second preset value, then reference value Pd1, Pd2 and Pd3 (Pd1 < Pd2 < Pd3) of three unit pressures at expulsion are set, i.e., it is aforementioned
The first preset pressure, the second preset pressure and third preset pressure, unit operation during, whenever the pressure ratio Pr of unit
When meeting condition " Pd < Pd1 and Pr1≤Pr < Pr2 " or condition " Pr < Pr1 " with pressure at expulsion Pd, closes one and determine frequency wind
Machine, whenever the pressure ratio Pr and pressure at expulsion Pd of unit meet condition " Pd3 > Pd >=Pd2 and Pr >=Pr2 " or condition " Pd >=Pd3 "
When, frequency blower is determined in starting one.For example, when air-cooled magnetic suspension unit have eight determine frequency blower when, if had been switched at this time
Four are determined frequency blower, then carry out the judgement of above-mentioned condition, if meeting condition " Pd < Pd1 and Pr1≤Pr < Pr2 " or condition
" Pr < Pr1 " then closes one and determines frequency blower, and the unlatching quantity for determining frequency blower at this time becomes three from four, if meeting item
Part " Pd3 > Pd >=Pd2 and Pr >=Pr2 " or condition " Pd >=Pd3 " then open one and determine frequency blower, determine opening for frequency blower at this time
Opening quantity becomes five from four, if aforementioned four condition is not satisfied, such as Pr1≤Pr < Pr2 and Pd2 > Pd >=
Pd1 Pd2 > Pd >=Pd1 and when Pr >=Pr2, maintains the current unlatching quantity for determining frequency blower, that is, be both not turned on and do not transport
Capable determines frequency blower, also do not close run determine frequency blower.It is arranged in this way, so that air-cooled magnetic suspension machine of the invention
Group can in operation control itself pressure ratio and pressure at expulsion (especially at low ambient temperatures in operation) in real time
And adjusting, and high control precision is mentioned, avoid that the pressure ratio of unit is too small or pressure at expulsion is excessive, while avoiding the pressure ratio of unit
There is bigger fluctuation, will not influence the normal operation of unit while ensureing set steady, guarantees that user's is normal
It uses.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of control method for air-cooled magnetic suspension unit, which is characterized in that the air-cooled magnetic suspension unit includes multiple
Determine frequency blower, the control method includes:
Obtain the pressure at expulsion and pressure ratio of the unit；
According at least one of the pressure at expulsion and the pressure ratio, frequency blower is selectively determined described in start and stop.
2. control method according to claim 1, which is characterized in that " according in the pressure at expulsion and the pressure ratio
At least one, selectively determines frequency blower described in start and stop " the step of specifically include:
If the pressure ratio less than the first preset value, makes at least one, described to determine frequency blower out of service.
3. control method according to claim 2, which is characterized in that " if the pressure ratio makes less than the first preset value
At least one is described, and to determine frequency blower out of service " the step of further comprise:
If the pressure ratio, which is less than, first preset value and continues the first preset time, one is set described determine frequency blower and stop
Operation.
4. control method according to claim 2, which is characterized in that " according in the pressure at expulsion and the pressure ratio
At least one, selectively determines frequency blower described in start and stop " the step of further include:
If the pressure ratio is greater than or equal to first preset value and less than the second preset value, and the pressure at expulsion is less than
First preset pressure, then make at least one it is described to determine frequency blower out of service,
Wherein, second preset value is greater than first preset value.
5. control method according to claim 4, which is characterized in that " if the pressure ratio is greater than or equal to described first
Preset value and less than the second preset value, and the pressure at expulsion then makes at least one described fixed frequency less than the first preset pressure
Blower is out of service " the step of further comprise:
If the pressure ratio be greater than or equal to first preset value and be less than second preset value and continue second it is default when
Between, and the pressure at expulsion is less than first preset pressure and continues third preset time, then makes one described to determine frequency wind
Machine is out of service.
6. control method according to claim 4, which is characterized in that " according in the pressure at expulsion and the pressure ratio
At least one, selectively determines frequency blower described in start and stop " the step of further include:
If the pressure ratio is greater than or equal to second preset value, and the pressure at expulsion is greater than or equal to the second default pressure
Power and be less than third preset pressure, then make at least one it is described determine frequency blower starting run,
Wherein, second preset pressure is greater than first preset pressure, and it is pre- that the third preset pressure is greater than described second
If pressure.
7. control method according to claim 6, which is characterized in that " if the pressure ratio is greater than or equal to described second
Preset value, and the pressure at expulsion is greater than or equal to the second preset pressure and is less than third preset pressure, then makes at least one
It is described determine frequency blower starting operation " the step of further comprise:
If the pressure ratio is greater than or equal to second preset value and continues the 4th preset time, and the pressure at expulsion is big
In or equal to second preset pressure and it is less than the third preset pressure and continues the 5th preset time, then makes described in one
Determine the starting operation of frequency blower.
8. control method according to claim 6, which is characterized in that " according in the pressure at expulsion and the pressure ratio
At least one, selectively determines frequency blower described in start and stop " the step of further include:
If the pressure at expulsion be greater than or equal to the third preset pressure, make at least one it is described determine frequency blower starting transport
Row.
9. control method according to claim 8, which is characterized in that " if the pressure at expulsion is more than or equal to described
Third preset pressure, then make at least one it is described determine frequency blower starting operation " the step of further comprise:
If the pressure at expulsion is greater than or equal to the third preset pressure and continues the 6th preset time, make described in one
Determine the starting operation of frequency blower.
10. a kind of air-cooled magnetic suspension unit, the air-cooled magnetic suspension unit includes controller, which is characterized in that the controller
It is configured to control method described in any one of perform claim requirement 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160996.5A CN110006140A (en) | 2019-03-04 | 2019-03-04 | Control method and air-cooled magnetic suspension unit for air-cooled magnetic suspension unit |
| PCT/CN2019/108268 WO2020177309A1 (en) | 2019-03-04 | 2019-09-26 | Air-cooled magnetic levitation unit control method and air-cooled magnetic levitation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160996.5A CN110006140A (en) | 2019-03-04 | 2019-03-04 | Control method and air-cooled magnetic suspension unit for air-cooled magnetic suspension unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110006140A true CN110006140A (en) | 2019-07-12 |
Family
ID=67166323
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|---|---|---|---|
| CN201910160996.5A Pending CN110006140A (en) | 2019-03-04 | 2019-03-04 | Control method and air-cooled magnetic suspension unit for air-cooled magnetic suspension unit |
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| Country | Link |
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| CN (1) | CN110006140A (en) |
| WO (1) | WO2020177309A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177309A1 (en) * | 2019-03-04 | 2020-09-10 | 青岛海尔空调电子有限公司 | Air-cooled magnetic levitation unit control method and air-cooled magnetic levitation unit |
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| WO2020177309A1 (en) | 2020-09-10 |
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