CN104236023B - Load control method and device - Google Patents
Load control method and device Download PDFInfo
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- CN104236023B CN104236023B CN201410549349.0A CN201410549349A CN104236023B CN 104236023 B CN104236023 B CN 104236023B CN 201410549349 A CN201410549349 A CN 201410549349A CN 104236023 B CN104236023 B CN 104236023B
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Abstract
The invention discloses a load control method and device. When a real measured return air temperature or a supply air temperature is different from the temperature set by a user, first, the load of a compressor is controlled according to the temperature difference relation of the real measured temperature and the set temperature, and on the basis, the temperature change rate of return air temperatures/supply air temperatures within a preset period is acquired. When the temperature change rate reaches a preset change rate node, corresponding balance adjusting is conducted on the load change of a compressor, like, under a refrigeration mode, the temperature change rate reaches a set negative node, a characteristic temperature drops too quick (namely the load of the compressor is loaded too quick), a sudden cold phenomenon happens, at the moment, the compressor can be controlled reversely to enable the compressor to unload parts of loads, the purpose of releasing the sudden cold phenomenon is achieved through a certain degree of temperature returning, and the return air temperature/supply air temperature is made to stably changed to the temperature set by the user. Accordingly, the stability of change of the return air temperature/supply air temperature is guaranteed, the hidden danger of being sudden cold and sudden hot is removed, and the comfort degree of a user is improved.
Description
Technical field
The invention belongs to the spatial load forecasting technical field of magnetic suspension water-cooled air conditioner, more particularly, to a kind of duty control method
And device.
Background technology
At present, magnetic suspension water-cooled cold-hot wind air-conditioner is typically simply just according to return air temperature or wind pushing temperature and user institute
The load of the temperature difference relation pair compressor of design temperature carries out increasing, down control, controls return air temperature or wind pushing temperature to reach
Purpose.
For example, under refrigeration mode, when return air temperature or wind pushing temperature are higher or lower than the temperature that user sets, air-conditioning
Device passes through correspondingly to increase or reduce the load of compressor, until return air temperature or wind pushing temperature are consistent with design temperature.This
Plant control method, do not consider the stationarity of temperature change it is impossible to bear to the input of compressor according to the actual refrigeration requirement of user
Lotus carries out real-time regulation, too fast, the sometimes hot and sometimes cold phenomenon of wind pushing temperature change easily, thus have impact on the comfort level of user.
Content of the invention
In view of this, it is an object of the invention to provide a kind of duty control method and device, with overcome prior art because
According to user's actual refrigeration requirement, real-time regulation can not be carried out to the input load of compressor, and the wind pushing temperature leading to dash forward cold
Prominent heat, the shortcoming that temperature change is unstable, the comfortable Experience Degree of user is low.
For this reason, the present invention is disclosed directly below technical scheme：
A kind of duty control method, including：
Obtain the design temperature of the current observed temperature of air-conditioner and user, described observed temperature is returning of actual measurement
Any one in air temperature or wind pushing temperature；
When described observed temperature is different from described design temperature, according to the temperature of described observed temperature and described design temperature
The load of difference relation pair magnetic suspension compressor is controlled；
Obtain in preset duration corresponding to observed temperature rate of temperature change；
When described rate of temperature change reaches relevant temperature rate of change node set in advance, magnetic suspension compressor is born
Lotus change carries out corresponding balance adjustment, so that described return air temperature or wind pushing temperature smooth change.
Said method it is preferred that described when observed temperature is different from described design temperature, according to described observed temperature with
The load of the temperature difference relation pair magnetic suspension compressor of described design temperature is controlled, including：
Under refrigeration mode, when described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load
Load；When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；When described actual measurement
When temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load；
Under heating mode, when described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load
Load；When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；When described actual measurement
When temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
Said method it is preferred that corresponding to observed temperature in described acquisition preset duration rate of temperature change, including：
Obtain described preset duration end of time t2Corresponding observed temperature Tt2, and obtain in described preset duration each
Mean temperature T of the observed temperature corresponding to predetermined time(t2-t1), wherein, t1Start time for described preset duration；
Using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate in preset duration corresponding to observed temperature temperature become
Rate kT.
Said method is it is preferred that described big according to described rate of temperature change and predetermined temperature rate of change node
The load variations of magnetic suspension compressor are balanced adjusting inclusion by little relation：
Under refrigeration mode, work as kTDuring≤A, control magnetic suspension compressor unloaded loads amount X1；Work as kTDuring >=B, control magnetic suspension
Compressor loads load Y1；Work as A<kT<During B, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, A, B,
X1、Y1It is real number, and A<0, B>0, X1>0, Y1>0；
Under heating mode, work as kTDuring≤C, magnetic suspension compressor is controlled to load load Z1；Work as kTDuring >=D, control magnetic suspension
Compressor unloading load U1；Work as C<kT<During D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, C, D,
Z1、U1It is real number, and C<0, D>0, Z1>0, U1>0.
Said method is it is preferred that also include：
Obtain magnetic suspension compressor in described preset duration load changing rate；
According to described rate of temperature change and predetermined temperature rate of change size of node relation, and described load becomes
The load variations of magnetic suspension compressor are balanced adjusting by rate and load changing rate size of node relation set in advance
Section.
Said method it is preferred that in the described preset duration of described acquisition magnetic suspension compressor load changing rate, bag
Include：
Obtain magnetic suspension compressor in described preset duration end of time t2When load Qt2, and obtain described preset duration
Average load Q of the magnetic suspension compressor load corresponding to each predetermined time interior(t2-t1), wherein, t1For described preset duration
Start time；
Using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate preset duration in magnetic suspension compressor load changing rate
kQ.
Said method is it is preferred that described closed with predetermined temperature rate of change size of node according to rate of temperature change
System, and load changing rate and load changing rate size of node relation set in advance, become to the load of magnetic suspension compressor
Change and be balanced adjusting, including：
Under refrigeration mode, work as kT≤ A and kQDuring >=F, control magnetic suspension compressor unloaded loads amount X2, work as kT≤ A and 0<kQ<
During F, control magnetic suspension compressor unloaded loads amount X1；Work as kT>=B and kQDuring≤E, magnetic suspension compressor is controlled to load load
Y2, work as kT>=B and E<kQ<When 0, magnetic suspension compressor is controlled to load load Y1；Work as A<kT<During B, not to magnetic suspension compressor
Load variations are balanced adjusting；Wherein, E, F, X2、Y2It is real number, and E<0, F>0, X2>X1, Y2>Y1；
Under heating mode, work as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to load load Z2, work as kT≤ C and E<kQ<
When 0, magnetic suspension compressor is controlled to load load Z1；Work as kT>=D and kQDuring >=F, control magnetic suspension compressor unloaded loads amount
U2, work as kT>=D and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount U1；Work as C<kT<During D, not to magnetic suspension compressor
Load variations are balanced adjusting；Wherein, Z2、U2It is real number, and Z2>Z1, U2>U1.
A kind of load control unit, including temperature acquisition module, control module, rate of temperature change acquisition module and the first school
Positive module, wherein：
Described temperature acquisition module, for obtaining the design temperature of the current observed temperature of air-conditioner and user, described
Observed temperature is any one in the return air temperature of actual measurement or wind pushing temperature；
Described control module, for when described observed temperature is different from described design temperature, according to described observed temperature
It is controlled with the load of the temperature difference relation pair magnetic suspension compressor of described design temperature；
Described rate of temperature change acquisition module, for obtain corresponding to observed temperature in preset duration temperature change
Rate；
Described first correction module, for big according to described rate of temperature change and predetermined temperature rate of change node
The load variations of magnetic suspension compressor are balanced adjusting, so that described return air temperature or wind pushing temperature steadily become by little relation
Change.
Said apparatus are it is preferred that described control module includes：
Refrigeration control unit, in cooling mode, when described observed temperature is more than described design temperature, controlling magnetic
Suspension compressor carries out load on；When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out
Load unloads；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load；
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controlling magnetic
Suspension compressor carries out load on；When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out
Load unloads；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
Said method is it is preferred that described rate of temperature change acquisition module includes：
Temperature acquiring unit, for obtaining described preset duration end of time t2Corresponding observed temperature Tt2, and obtain
Mean temperature T of the observed temperature corresponding to each predetermined time in described preset duration(t2-t1), wherein, t1For described default when
Long start time；
Rate of temperature change computing unit, for using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate in preset duration in fact
Corresponding to testing temperature rate of temperature change kT.
Said method it is preferred that described first correction module, including：
First refrigeration correction unit, in cooling mode, working as kTDuring≤A, control magnetic suspension compressor unloaded loads
Amount X1；Work as kTDuring >=B, magnetic suspension compressor is controlled to load load Y1；Work as A<kT<During B, the not load to magnetic suspension compressor
Change is balanced adjusting；Wherein, A, B, X1、Y1It is real number, and A<0, B>0, X1>0, Y1>0；
First heats correction unit, in a heating mode, working as kTDuring≤C, magnetic suspension compressor is controlled to load load
Amount Z1；Work as kTDuring >=D, control magnetic suspension compressor unloaded loads amount U1；Work as C<kT<During D, the not load to magnetic suspension compressor
Change is balanced adjusting；Wherein, C, D, Z1、U1It is real number, and C<0, D>0, Z1>0, U1>0.
Said method is it is preferred that also include：
Load changing rate acquisition module, for obtain magnetic suspension compressor in described preset duration load changing rate
kQ；
Second correction module, for closing with predetermined temperature rate of change size of node according to described rate of temperature change
System, and described load changing rate and load changing rate size of node relation set in advance, bear to magnetic suspension compressor
Lotus change is balanced adjusting.
Said method is it is preferred that described load changing rate acquisition module includes：
Load obtaining unit, for obtaining magnetic suspension compressor in described preset duration end of time t2When load Qt2,
And obtain average load Q of the magnetic suspension compressor load corresponding to each predetermined time in described preset duration(t2-t1), its
In, t1 is the start time of described preset duration；
Load changing rate computing unit, for using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate magnetic in preset duration
The load changing rate k of suspension compressorQ.
Said method is it is preferred that described second correction module includes：
Second refrigeration correction unit, in cooling mode, working as kT≤ A and kQDuring >=F, magnetic suspension compressor is controlled to unload
Carry load X2, work as kT≤ A and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount X1；Work as kT>=B and kQDuring≤E, control
Magnetic suspension compressor loads load Y2, work as kT>=B and E<kQ<When 0, magnetic suspension compressor is controlled to load load Y1；Work as A<kT<
During B, the not load variations to magnetic suspension compressor and kQ>=F balance adjustment；Wherein, E, F, X2、Y2It is real number, and E<0, F>
0, X2>X1, Y2>Y1；
Second heats correction unit, in a heating mode, working as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to add
Carry load Z2, work as kT≤ C and E<kQ<When 0, magnetic suspension compressor is controlled to load load Z1；Work as kT>=D and kQDuring >=F, control
Magnetic suspension compressor unloaded loads amount U2, work as kT>=D and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount U1；Work as C<kT<
During D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, Z2、U2It is real number, and Z2>Z1, U2>U1.
To sum up, duty control method disclosed by the invention and device, in return air temperature or wind pushing temperature and the user of actual measurement
Design temperature different when, the load being first depending on observed temperature with the temperature difference relation pair compressor of design temperature is controlled,
On this basis, obtain the rate of temperature change of return air temperature/wind pushing temperature in preset duration, and reach in rate of temperature change default
Rate of change node when, corresponding balance adjustment is carried out to the load variations of compressor, for example, under refrigeration mode, temperature change
When rate reaches the negative nodal point of setting, characterize temperature drop too fast (i.e. compressor load loading is too fast), occur in that cold phenomenon suddenly, this
When, it can be made to unload a part of load by Reverse Turning Control compressor, the mesh alleviating cold phenomenon suddenly is reached by a certain degree of rising again
, make the temperature that return air temperature/wind pushing temperature smooth change to user sets.It can be seen that, this invention ensures that return air temperature/air-supply
The stationarity of temperature change, eliminates prominent cold hot hidden danger of dashing forward, improves the comfort level of user.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing providing obtains other accompanying drawings.
Fig. 1 is a kind of flow chart of duty control method disclosed in the embodiment of the present invention one；
Fig. 2 is according to rate of temperature change, the load variations of compressor to be entered under refrigeration mode disclosed in the embodiment of the present invention one
The flow chart that row is adjusted；
Fig. 3 is according to rate of temperature change, the load variations of compressor to be entered under heating mode disclosed in the embodiment of the present invention one
The flow chart that row is adjusted；
Fig. 4 is another kind of flow chart of duty control method disclosed in the embodiment of the present invention two；
Fig. 5 is to compressor under refrigeration mode disclosed in the embodiment of the present invention two according to rate of temperature change, load changing rate
The flow chart that is adjusted of load variations；
Fig. 6 is to compressor under heating mode disclosed in the embodiment of the present invention two according to rate of temperature change, load changing rate
The flow chart that is adjusted of load variations；
Fig. 7 is a kind of structural representation of load control unit disclosed in the embodiment of the present invention three；
Fig. 8 is another kind of structural representation of load control unit disclosed in the embodiment of the present invention three.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment one
The present embodiment one discloses a kind of duty control method, can be used for the load of magnetic suspension water-cooled cold-hot wind air-conditioner is entered
Row controls, and with reference to Fig. 1, methods described may comprise steps of：
S101：Obtain the design temperature of the current observed temperature of air-conditioner and user, described observed temperature is actual survey
Any one in the return air temperature of amount or wind pushing temperature.
Wherein, specifically can adopt the temperature measuring device such as temperature sensor that return air temperature or wind pushing temperature are measured.
S102：When described observed temperature is different from described design temperature, set temperature according to described observed temperature with described
The load of the temperature difference relation pair magnetic suspension compressor of degree is controlled.
When the return air temperature of actual measurement or wind pushing temperature are different from the design temperature of user, need to return air temperature or
Wind pushing temperature is controlled adjusting so as to become the temperature turning to set by user, and magnetic suspension water-cooled cold-hot wind air-conditioning implement body leads to
Cross the load to its magnetic suspension compressor to carry out plus Unloading Control, realize return air temperature or wind pushing temperature are adjusted.
Temperature difference relation pair magnetic suspension when observed temperature is different from the design temperature of user, first according to both for this step
The load of compressor is carried out plus Unloading Control.
Specifically, under refrigeration mode, when described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to enter
Row load on；When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；Work as institute
When stating observed temperature equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
Under heating mode, when described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load
Load；When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；When described actual measurement
When temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
S103：Obtain in preset duration corresponding to observed temperature rate of temperature change.
In the temperature difference relation of the return air temperature according to actual measurement or wind pushing temperature and user's design temperature, to magnetic suspension compressor
Load carry out plus Unloading Control on the basis of, for prevent because plus unloading unstable and occur return air temperature or wind pushing temperature change
Too fast, sometimes hot and sometimes cold phenomenon, invention defines characterize the return air temperature of air-conditioner or the physics of wind pushing temperature change speed
Amount temperature rate of change, and the rate of temperature change according to return air temperature or wind pushing temperature, become to the load of magnetic suspension compressor
Change and carry out real-time balance adjustment, to reach the purpose of the steady return air temperature/wind pushing temperature controlling air-conditioner.
This step S103 is especially by observed temperature in following Procedure Acquisition preset duration (i.e. return air temperature/wind pushing temperature)
Corresponding rate of temperature change：
Obtain described preset duration end of time t2Corresponding observed temperature Tt2, and obtain in described preset duration each
Mean temperature T of the observed temperature corresponding to predetermined time(t2-t1), wherein, t1For the described start time stating preset duration；
Using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate in preset duration corresponding to observed temperature temperature become
Rate kT.
S104：When described rate of temperature change reaches relevant temperature rate of change node set in advance, magnetic suspension is compressed
The load variations of machine carry out corresponding balance adjustment, so that described return air temperature or wind pushing temperature smooth change.
With reference to Fig. 2, under refrigeration mode, the relation of concrete foundation rate of temperature change and predetermined temperature rate of change node
Following balance adjustment is carried out to the load variations of magnetic suspension compressor：
S201：Judge the relation of rate of temperature change and predetermined temperature rate of change node.
S202：Work as kTDuring≤A, control magnetic suspension compressor unloaded loads amount X1.
S203：Work as kTDuring >=B, magnetic suspension compressor is controlled to load load Y1.
S204：Work as A<kT<During B, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, A, B, X1、Y1
It is real number, and A<0, B>0, X1>0, Y1>0.
Specifically, under refrigeration mode, the rate of change node of setting taking A=-1, B=1 as a example, that is, when return air temperature/air-supply
The rate of temperature change of temperature is less than -1 or during higher than 1, characterizes that its temperature change is too fast, need to be to the load variations of magnetic suspension compressor
It is balanced adjusting.
Under refrigeration mode, kTWhen≤- 1, characterize the design temperature that current actual temperature is less than user, air-conditioner is controlled
Return air temperature/wind pushing temperature processed is lowered the temperature, and the rate of temperature change of return air temperature/wind pushing temperature has reached the minimum change of setting
Rate node -1, thus the load on of compressor is too fast, need to be balanced to it adjusting, now the present invention controls magnetic suspension pressure
Load X of contracting machine unloading one setting1, counterbalancing is carried out with the loading velocity too fast to compressor, so make return air temperature/
Wind pushing temperature carries out a certain degree of rising again, it is to avoid occur neglecting cold phenomenon.
Answer together ground, under refrigeration mode, kTWhen >=1, heat up too fast, the rate of debarkation of magnetic suspension compressor is too fast, now, this
Invention controls magnetic suspension compressor to load load Y of a setting1, reversely put down with the discharge rate too fast to compressor
Weighing apparatus, makes return air temperature/wind pushing temperature carry out a certain degree of rising again, it is to avoid occur neglecting thermal phenomenon.And -1<kT<When 1, return air temperature
The rate of temperature change of degree/wind pushing temperature is not up to the change node setting, and the speed of temperature change is moderate, and user's perception is more easypro
Suitable, the load variations of magnetic suspension compressor need not be balanced adjust.
With reference to Fig. 3, under heating mode, following balance adjustment is carried out to the load variations of magnetic suspension compressor：
S301：Judge the relation of rate of temperature change and predetermined temperature rate of change node.
S302：Work as kTDuring≤C, magnetic suspension compressor is controlled to load load Z1.
S303：Work as kTDuring >=D, control magnetic suspension compressor unloaded loads amount U1.
S304：Work as C<kT<During D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, C, D, Z1、U1
It is real number, and C<0, D>0, Z1>0, U1>0
Under heating mode, the rate of change node of setting equally taking C=-1, D=1 as a example.
Work as kTWhen≤- 1, the return air temperature/wind pushing temperature cooling characterizing air-conditioner is too fast, the unloading speed of magnetic suspension compressor
Rate is too fast, now, controls magnetic suspension compressor to load load Z of a setting1, carried out with the discharge rate too fast to compressor
Counterbalancing, makes return air temperature/wind pushing temperature carry out a certain degree of rising again, it is to avoid occur neglecting cold phenomenon.
Work as kTWhen >=1, the return air temperature/wind pushing temperature characterizing air-conditioner heats up too soon, the loading speed of magnetic suspension compressor
Rate is too fast, now, controls load U of magnetic suspension compressor unloading one setting1, carried out with the loading velocity too fast to compressor
Counterbalancing, makes return air temperature/wind pushing temperature carry out a certain degree of rising again, it is to avoid occur neglecting thermal phenomenon.And -1<kT<1
When, the temperature change of air-conditioner is moderate, need not adjust the load variations speed of magnetic suspension compressor.
It should be noted that X1、Y1、Z1、U1Value can be according to the temperature change of return air temperature/wind pushing temperature and magnetcisuspension
The corresponding relation of floating compressor load change is formulated, and can reach the load variations to magnetic suspension compressor and be balanced
Adjust, and then so that the temperature change of return air temperature/wind pushing temperature is tended to be steady, it is possible to increase the comfort level of user is defined.
During the concrete application present invention, described preset duration can be set as a less duration, for example, be set as 2s, 5s etc.
Second level rank or the duration of shorter rank, to realize by using the inventive method, the temperature of return air temperature/wind pushing temperature being become
Rate is calculated in real time, and carries out real-time regulation to the load variations of magnetic suspension compressor, reaches and makes return air temperature/air-supply temperature
Spend smooth change to the purpose of design temperature.
To sum up, duty control method disclosed by the invention and device, in return air temperature or wind pushing temperature and the user of actual measurement
Design temperature different when, the load being first depending on observed temperature with the temperature difference relation pair compressor of design temperature is controlled,
On this basis, obtain the rate of temperature change of return air temperature/wind pushing temperature in preset duration, and reach in rate of temperature change default
Rate of change node when, corresponding balance adjustment is carried out to the load variations of compressor, for example, under refrigeration mode, temperature change
When rate reaches the negative nodal point of setting, characterize temperature drop too fast (i.e. compressor load loading is too fast), occur in that cold phenomenon suddenly, this
When, it can be made to unload a part of load by Reverse Turning Control compressor, the mesh alleviating cold phenomenon suddenly is reached by a certain degree of rising again
, make the temperature that return air temperature/wind pushing temperature smooth change to user sets.It can be seen that, this invention ensures that return air temperature/air-supply
The stationarity of temperature change, eliminates prominent cold hot hidden danger of dashing forward, improves the comfort level of user.
Embodiment two
The present embodiment two continues the duty control method of embodiment one is improved.With reference to Fig. 4, methods described is also wrapped
Include：
S105：Obtain magnetic suspension compressor in described preset duration load changing rate.
In prior art, due to negative only in accordance with return air temperature/wind pushing temperature and design temperature temperature difference relation pair compressor
Lotus is controlled, and dashes forward cold or prominent heat easily wind pushing temperature, while reducing users'comfort, also there is compressor load and adds
Unloading is unstable, and (load variations are too fast：Load too fast or carry unload too fast) hidden danger, the use longevity of magnetic suspension compressor can be affected
Life, and then affect the reliability of unit.
Based on this, the present embodiment except changing the rate of temperature change of return air temperature/wind pushing temperature as compressor load
The foundation of balance adjustment, also simultaneously using the load changing rate of compressor as balance adjustment foundation, wherein, load changing rate have
Body is to characterize the physical quantity that compressor load changes speed.
The load changing rate process that this step obtains magnetic suspension compressor is as follows：
Obtain magnetic suspension compressor in described preset duration end of time t2When load Qt2, and obtain described preset duration
Average load Q of the magnetic suspension compressor load corresponding to each predetermined time interior(t2-t1), wherein, t1For described preset duration
Start time；
Using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate preset duration in magnetic suspension compressor load changing rate
kQ.
S106：According to described rate of temperature change and predetermined temperature rate of change size of node relation and described
The load variations of magnetic suspension compressor are put down by load changing rate and load changing rate size of node relation set in advance
Weighing apparatus is adjusted.
With reference to Fig. 5, under refrigeration mode, according to the rate of temperature change and load changing rate load variations to magnetic suspension compressor
Be balanced adjust principle be：
S501：Judge the relation of rate of temperature change and predetermined temperature rate of change node.
S502：Judge the relation of load changing rate and load changing rate node set in advance.
S503：Work as kT≤ A and kQDuring >=F, control magnetic suspension compressor unloaded loads amount X2.
S504：Work as kT≤ A and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount X1.
S505：Work as kT>=B and kQDuring≤E, magnetic suspension compressor is controlled to load load Y2.
S506：Work as kT>=B and E<kQ<When 0, magnetic suspension compressor is controlled to load load Y1.
S507：Work as A<kT<During B, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, E, F, X2、Y2
It is real number, and E<0, F>0, X2>X1, Y2>Y1.
Specifically, under refrigeration mode, the present embodiment design temperature rate of change node A=-1, B=1, load changing rate node
E=-1, F=1.
Under refrigeration mode, work as kT≤ -1 and kQWhen >=1, characterize cooling too soon, the load on of compressor is too fast, and load
Rate of change has reached the rate of change node of setting, now considers temperature change and load variations, controls magnetic suspension compressor
Unloading one is more than X1Load X2, while to realize rising again, relatively large degree ground is put down to the load variations of compressor
Weighing apparatus is adjusted, to protect compressor to be not damaged by；Work as kT≤ -1 and 0<kQ<When 1, characterize that cooling is too fast, but the unloading of magnetic suspension compressor
Carry speed and be not up to the node setting, therefore only the load variations of compressor are balanced adjust from the angle of rate of temperature change
, now, control compressor unloading load X1.
Work as kT>=1 and kQWhen≤- 1, heat up too fast, and the load unloading of compressor is too fast, has reached the load variations of setting
Rate node, now considers temperature change and load variations, controls magnetic suspension compressor to load one and is more than Y1Load Y2,
Protection compressor is not damaged by；Work as kT>=1 and -1<kQ<When 0, heat up too fast, but the discharge rate of compressor is not up to setting
The load variations of compressor now, only are balanced adjusting from the angle of rate of temperature change, control compressor loads to bear by node
Lotus amount Y1.
When -1<kT<When 1, the speed of temperature change is moderate, and the load variations phase due to temperature change and compressor is echoed,
The load variations speed of default compressor is moderate, now, is not required to the load variations of magnetic suspension compressor are balanced adjust.
With reference to Fig. 6, under heating mode, according to the rate of temperature change and load changing rate load variations to magnetic suspension compressor
Be balanced adjust principle be：
S601：Judge the relation of rate of temperature change and predetermined temperature rate of change node.
S502：Judge the relation of load changing rate and load changing rate node set in advance.
S603：Work as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to load load Z2.
S604：Work as kT≤ C and E<kQ<When 0, magnetic suspension compressor is controlled to load load Z1.
S605：Work as kT>=D and kQDuring >=F, control magnetic suspension compressor unloaded loads amount U2.
S606：Work as kT>=D and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount U1.
S607：Work as C<kT<During D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, Z2、U2It is
Real number, and Z2>Z1, U2>U1.
The balancing the load Principles of Regulation heating situation are relative with the balancing the load Principles of Regulation in the case of refrigeration, specifically no longer
Citing illustrates.
Step S105 of the present embodiment and S106 can be respectively as the inventive method with step S104 in embodiment one
Liang Tao branch, in the concrete application present invention, can independently select to adopt branch S104 to be with reference to regulation pressure only with rate of temperature change
The load variations of contracting machine, or adopt branch S105 and S106 simultaneously with rate of temperature change, load changing rate for reference pair compressor
Load variations be balanced adjust.
The present embodiment ensure that return air temperature/wind pushing temperature steady change, improve while users'comfort it is ensured that
The load of magnetic suspension compressor can smoothly be carried out plus unloading, improves the reliability of unit operation.
Embodiment three
The present embodiment three discloses a kind of load control unit, this device and embodiment one and load control disclosed in embodiment two
Method processed is corresponding.
First, corresponding to embodiment one, with reference to Fig. 7, described device include temperature acquisition module 100, control module 200,
Rate of temperature change acquisition module 300 and the first correction module 400.
Temperature acquisition module 100, for obtaining the design temperature of the current observed temperature of air-conditioner and user, described reality
Testing temperature is any one in the return air temperature of actual measurement or wind pushing temperature.
Control module 200, for when described observed temperature is different from described design temperature, according to described observed temperature with
The load of the temperature difference relation pair magnetic suspension compressor of described design temperature is controlled.
Wherein, control module 200 includes refrigeration control unit and heats control unit.
Refrigeration control unit, in cooling mode, when described observed temperature is more than described design temperature, controlling magnetic
Suspension compressor carries out load on；When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out
Load unloads；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load；
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controlling magnetic
Suspension compressor carries out load on；When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out
Load unloads；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
Rate of temperature change acquisition module 300, for obtain corresponding to observed temperature in preset duration rate of temperature change.
Wherein, rate of temperature change acquisition module 300 includes temperature acquiring unit and rate of temperature change computing unit.
Temperature acquiring unit, for obtaining described preset duration end of time t2Corresponding observed temperature Tt2, and obtain
Mean temperature T of the observed temperature corresponding to each predetermined time in described preset duration(t2-t1), wherein, t1For described default when
Long start time；
Rate of temperature change computing unit, for using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate in preset duration in fact
Corresponding to testing temperature rate of temperature change kT.
First correction module 400, for big according to described rate of temperature change and predetermined temperature rate of change node
The load variations of magnetic suspension compressor are balanced adjusting, so that described return air temperature or wind pushing temperature steadily become by little relation
Change.
Wherein, the first correction module 400 include first refrigeration correction unit and first heat correction unit.
First refrigeration correction unit, in cooling mode, working as kTDuring≤A, control magnetic suspension compressor unloaded loads
Amount X1；Work as kTDuring >=B, magnetic suspension compressor is controlled to load load Y1；Work as A<kT<During B, the not load to magnetic suspension compressor
Change is balanced adjusting；Wherein, A, B, X1、Y1It is real number, and A<0, B>0, X1>0, Y1>0；
First heats correction unit, in a heating mode, working as kTDuring≤C, magnetic suspension compressor is controlled to load load
Amount Z1；Work as kTDuring >=D, control magnetic suspension compressor unloaded loads amount U1；Work as C<kT<During D, the not load to magnetic suspension compressor
Change is balanced adjusting；Wherein, C, D, Z1、U1It is real number, and C<0, D>0, Z1>0, U1>0.
Corresponding to embodiment two, described device also includes load changing rate acquisition module 500 and the second correction module 600.
Load changing rate acquisition module 500, for obtain magnetic suspension compressor in described preset duration load variations
Rate kQ.
Wherein, load changing rate acquisition module 500 includes Load obtaining unit and load changing rate computing unit.
Load obtaining unit, for obtaining magnetic suspension compressor in described preset duration end of time t2When load Qt2,
And obtain average load Q of the magnetic suspension compressor load corresponding to each predetermined time in described preset duration(t2-t1), its
In, t1Start time for described preset duration；
Load changing rate computing unit, for using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate magnetic in preset duration
The load changing rate k of suspension compressorQ.
Second correction module 600, for big according to described rate of temperature change and predetermined temperature rate of change node
Little relation, and described load changing rate and load changing rate size of node relation set in advance, to magnetic suspension compressor
Load variations be balanced adjust.
Wherein, the second correction module 600 include second refrigeration correction unit and second heat correction unit.
Second refrigeration correction unit, in cooling mode, working as kT≤ A and kQDuring >=F, magnetic suspension compressor is controlled to unload
Carry load X2, work as kT≤ A and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount X1；Work as kT>=B and kQDuring≤E, control
Magnetic suspension compressor loads load Y2, work as kT>=B and E<kQ<When 0, magnetic suspension compressor is controlled to load load Y1；Work as A<kT<
During B, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, E, F, X2、Y2It is real number, and E<0, F>0, X2
>X1, Y2>Y1；
Second heats correction unit, in a heating mode, working as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to add
Carry load Z2, work as kT≤ C and E<kQ<When 0, magnetic suspension compressor is controlled to load load Z1；Work as kT>=D and kQDuring >=F, control
Magnetic suspension compressor unloaded loads amount U2, work as kT>=D and 0<kQ<During F, control magnetic suspension compressor unloaded loads amount U1；Work as C<kT<
During D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, Z2、U2It is real number, and Z2>Z1, U2>U1.
For load control unit disclosed in the embodiment of the present invention three, due to itself and above example one and embodiment
Disclosed in two, duty control method is corresponding, so description is fairly simple, related similarity refers to embodiment one and reality
Apply the explanation of duty control method part in example two, no longer describe in detail herein.
In sum, the present invention passes through with rate of temperature change and load changing rate for the load of reference pair magnetic suspension compressor
Change is balanced adjusting it is achieved that according to the actual refrigeration requirement of client, carrying out in real time to the input load of magnetic suspension compressor
Adjust, control more hommization, ensureing return air temperature/wind pushing temperature smooth change, eliminating prominent cold hot hidden danger of dashing forward, improve and use
While the comfort level at family, also achieve magnetic suspension compressor load steadily adds unloading, improves the reliability of unit operation.
In the application, in rate of temperature change node and load changing rate node, negative nodal point A, C, the preferred span of E are
[- 5,0), the preferred span of positive node B, D, F be (0,5], in the practical application present invention, without departing from the application spirit
Or on the premise of scope, those skilled in the art can be according to the actual conditions of temperature change and load variations to rate of temperature change section
The value of point and load changing rate node carries out sets itself.
It should be noted that each embodiment in this specification is all described by the way of going forward one by one, each embodiment weight
Point explanation is all difference with other embodiment, between each embodiment identical similar partly mutually referring to.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (14)
1. a kind of duty control method is it is characterised in that include：
Obtain the design temperature of the current observed temperature of air-conditioner and user, described observed temperature is the return air temperature of actual measurement
Any one in degree or wind pushing temperature；
When described observed temperature is different from described design temperature, the temperature difference according to described observed temperature and described design temperature is closed
System is controlled to the load of magnetic suspension compressor；
During the load to magnetic suspension compressor is controlled such that air-conditioner observed temperature changes, obtain default
Corresponding to observed temperature in duration rate of temperature change；
When described rate of temperature change reaches relevant temperature rate of change node set in advance, the load of magnetic suspension compressor is become
Change and carry out corresponding balance adjustment, so that described return air temperature or wind pushing temperature smooth change；Wherein, described to magnetic suspension compression
The load variations of machine carry out corresponding balance adjustment and include：The relevant temperature rate of change node being reached when described rate of temperature change
Represent when load on speed is too fast or discharge rate is too fast of magnetic suspension compressor, the load of described magnetic suspension compressor is entered
The corresponding unloading of row is processed or loading processing.
2. method according to claim 1 it is characterised in that described when observed temperature is different from described design temperature,
Load according to described observed temperature and the temperature difference relation pair magnetic suspension compressor of described design temperature is controlled, including：
Under refrigeration mode, when described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load on；
When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；When described observed temperature
During equal to described design temperature, magnetic suspension compressor is controlled to maintain former load；
Under heating mode, when described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load on；
When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load unloading；When described observed temperature
During equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
3. method according to claim 2 it is characterised in that corresponding to observed temperature in described acquisition preset duration
Rate of temperature change, including：
Obtain described preset duration end of time t2Corresponding observed temperature Tt2, and obtain that each is preset in described preset duration
Mean temperature T of the observed temperature corresponding to the moment(t2-t1), wherein, t1Start time for described preset duration；
Using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate in preset duration corresponding to observed temperature rate of temperature change
kT.
4. method according to claim 3 it is characterised in that described according to described rate of temperature change and temperature set in advance
The load variations of magnetic suspension compressor are balanced adjusting inclusion by degree rate of change size of node relation：
Under refrigeration mode, work as kTDuring≤A, control magnetic suspension compressor unloaded loads amount X1；Work as kTDuring >=B, control magnetic suspension compression
Machine loads load Y1；As A ＜ kTDuring ＜ B, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, A, B,
X1、Y1It is real number, and A ＜ 0, B ＞ 0, X1＞ 0, Y1＞ 0；
Under heating mode, work as kTDuring≤C, magnetic suspension compressor is controlled to load load Z1；Work as kTDuring >=D, control magnetic suspension compression
Machine unloaded loads amount U1；As C ＜ kTDuring ＜ D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, C, D,
Z1、U1It is real number, and C ＜ 0, D ＞ 0, Z1＞ 0, U1＞ 0.
5. method according to claim 3 is it is characterised in that also include：
Obtain magnetic suspension compressor in described preset duration load changing rate；
According to described rate of temperature change and predetermined temperature rate of change size of node relation, and described load changing rate
With load changing rate size of node relation set in advance, the load variations of magnetic suspension compressor are balanced adjusting.
6. method according to claim 5 is it is characterised in that magnetic suspension compressor in the described preset duration of described acquisition
Load changing rate, including：
Obtain magnetic suspension compressor in described preset duration end of time t2When load Qt2, and obtain each in described preset duration
Average load Q of the magnetic suspension compressor load corresponding to individual predetermined time(t2-t1), wherein, t1Starting point for described preset duration
Moment；
Using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate preset duration in magnetic suspension compressor load changing rate kQ.
7. method according to claim 6 is it is characterised in that described become with predetermined temperature according to rate of temperature change
Rate size of node relation, and load changing rate and load changing rate size of node relation set in advance, to magnetcisuspension
The load variations of floating compressor are balanced adjusting, including：
Under refrigeration mode, work as kT≤ A and kQDuring >=F, control magnetic suspension compressor unloaded loads amount X2, work as kT≤ A and 0 ＜ kQ＜ F
When, control magnetic suspension compressor unloaded loads amount X1；Work as kT>=B and kQDuring≤E, magnetic suspension compressor is controlled to load load Y2,
Work as kT>=B and E ＜ kQDuring ＜ 0, magnetic suspension compressor is controlled to load load Y1；As A ＜ kTDuring ＜ B, not to magnetic suspension compressor
Load variations be balanced adjust；Wherein, E, F, X2、Y2It is real number, and E ＜ 0, F ＞ 0, X2＞ X1, Y2＞ Y1；
Under heating mode, work as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to load load Z2, work as kT≤ C and E ＜ kQ＜ 0
When, control magnetic suspension compressor to load load Z1；Work as kT>=D and kQDuring >=F, control magnetic suspension compressor unloaded loads amount U2,
Work as kT>=D and 0 ＜ kQDuring ＜ F, control magnetic suspension compressor unloaded loads amount U1；As C ＜ kTDuring ＜ D, not to magnetic suspension compressor
Load variations be balanced adjust；Wherein, Z2、U2It is real number, and Z2＞ Z1, U2＞ U1, A ＜ 0, B ＞ 0, X1＞ 0, Y1＞ 0,
C ＜ 0, D ＞ 0, Z1＞ 0, U1＞ 0.
8. a kind of load control unit is it is characterised in that include temperature acquisition module, control module, rate of temperature change acquisition mould
Block and the first correction module, wherein：
Described temperature acquisition module, for obtaining the design temperature of the current observed temperature of air-conditioner and user, described actual measurement
Temperature is any one in the return air temperature of actual measurement or wind pushing temperature；
Described control module, for when described observed temperature is different from described design temperature, according to described observed temperature and institute
The load stating the temperature difference relation pair magnetic suspension compressor of design temperature is controlled；
Described rate of temperature change acquisition module, during being controlled in the load to magnetic suspension compressor, obtains pre-
If corresponding to observed temperature in duration rate of temperature change；
Described first correction module, for closing with predetermined temperature rate of change size of node according to described rate of temperature change
The load variations of magnetic suspension compressor are balanced adjusting by system, so that described return air temperature or wind pushing temperature smooth change；Its
In, the described load variations to magnetic suspension compressor carry out corresponding balance adjustment and include：When described rate of temperature change is reached
Relevant temperature rate of change node represent that the load on speed of magnetic suspension compressor is too fast or when discharge rate is too fast, to described
The load of magnetic suspension compressor is unloaded process or loading processing accordingly.
9. device according to claim 8 is it is characterised in that described control module includes：
Refrigeration control unit, in cooling mode, when described observed temperature is more than described design temperature, controlling magnetic suspension
Compressor carries out load on；When described observed temperature is less than described design temperature, magnetic suspension compressor is controlled to carry out load
Unloading；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load；
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controlling magnetic suspension
Compressor carries out load on；When described observed temperature is more than described design temperature, magnetic suspension compressor is controlled to carry out load
Unloading；When described observed temperature is equal to described design temperature, magnetic suspension compressor is controlled to maintain former load.
10. device according to claim 9 is it is characterised in that described rate of temperature change acquisition module includes：
Temperature acquiring unit, for obtaining described preset duration end of time t2Corresponding observed temperature Tt2, and obtain described
Mean temperature T of the observed temperature corresponding to each predetermined time in preset duration(t2-t1), wherein, t1For described preset duration
Start time；
Rate of temperature change computing unit, for using formula kT=(Tt2-T(t2-t1))/(t2-t1) calculate actual measurement temperature in preset duration
Degree corresponding rate of temperature change kT.
11. devices according to claim 10 it is characterised in that described first correction module, including：
First refrigeration correction unit, in cooling mode, working as kTDuring≤A, control magnetic suspension compressor unloaded loads amount X1；
Work as kTDuring >=B, magnetic suspension compressor is controlled to load load Y1；As A ＜ kTDuring ＜ B, the not load variations to magnetic suspension compressor
It is balanced adjusting；Wherein, A, B, X1、Y1It is real number, and A ＜ 0, B ＞ 0, X1＞ 0, Y1＞ 0；
First heats correction unit, in a heating mode, working as kTDuring≤C, magnetic suspension compressor is controlled to load load Z1；
Work as kTDuring >=D, control magnetic suspension compressor unloaded loads amount U1；As C ＜ kTDuring ＜ D, the not load variations to magnetic suspension compressor
It is balanced adjusting；Wherein, C, D, Z1、U1It is real number, and C ＜ 0, D ＞ 0, Z1＞ 0, U1＞ 0.
12. devices according to claim 10 are it is characterised in that also include：
Load changing rate acquisition module, for obtain magnetic suspension compressor in described preset duration load changing rate kQ；
Second correction module, for according to described rate of temperature change and predetermined temperature rate of change size of node relation,
And described load changing rate and load changing rate size of node relation set in advance, the load of magnetic suspension compressor is become
Change and be balanced adjusting.
13. devices according to claim 12 are it is characterised in that described load changing rate acquisition module includes：
Load obtaining unit, for obtaining magnetic suspension compressor in described preset duration end of time t2When load Qt2, and obtain
Take average load Q of the magnetic suspension compressor load corresponding to each predetermined time in described preset duration(t2-t1), wherein, t1For
The start time of described preset duration；
Load changing rate computing unit, for using formula kQ=(Qt2-Q(t2-t1))/(t2-t1) calculate magnetic suspension in preset duration
The load changing rate k of compressorQ.
14. devices according to claim 13 are it is characterised in that described second correction module includes：
Second refrigeration correction unit, in cooling mode, working as kT≤ A and kQDuring >=F, control magnetic suspension compressor to unload and load with
Lotus amount X2, work as kT≤ A and 0 ＜ kQDuring ＜ F, control magnetic suspension compressor unloaded loads amount X1；Work as kT>=B and kQDuring≤E, control magnetic
Suspension compressor loads load Y2, work as kT>=B and E ＜ kQDuring ＜ 0, magnetic suspension compressor is controlled to load load Y1；As A ＜ kT
During ＜ B, the not load variations to magnetic suspension compressor and kQ>=F balance adjustment；Wherein, E, F, X2、Y2It is real number, and E ＜ 0,
F ＞ 0, X2＞ X1, Y2＞ Y1；
Second heats correction unit, in a heating mode, working as kT≤ C and kQDuring≤E, magnetic suspension compressor is controlled to load negative
Lotus amount Z2, work as kT≤ C and E ＜ kQDuring ＜ 0, magnetic suspension compressor is controlled to load load Z1；Work as kT>=D and kQDuring >=F, control magnetic
Suspension compressor unloading load U2, work as kT>=D and 0 ＜ kQDuring ＜ F, control magnetic suspension compressor unloaded loads amount U1；As C ＜ kT
During ＜ D, the load variations of magnetic suspension compressor are not balanced adjusting；Wherein, Z2、U2It is real number, and Z2＞ Z1, U2＞
U1, A ＜ 0, B ＞ 0, X1＞ 0, Y1＞ 0, C ＜ 0, D ＞ 0, Z1＞ 0, U1＞ 0.
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