CN104236023A - Load control method and device - Google Patents
Load control method and device Download PDFInfo
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- CN104236023A CN104236023A CN201410549349.0A CN201410549349A CN104236023A CN 104236023 A CN104236023 A CN 104236023A CN 201410549349 A CN201410549349 A CN 201410549349A CN 104236023 A CN104236023 A CN 104236023A
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- 238000005057 refrigeration Methods 0.000 claims abstract description 36
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- 239000000725 suspension Substances 0.000 claims description 217
- 238000013461 design Methods 0.000 claims description 70
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000012937 correction Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 7
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Abstract
The load control method and the device disclosed by the invention have the advantages that when the actually measured return air temperature or the air supply temperature is different from the temperature set by a user, firstly, the load of the compressor is controlled according to the temperature difference relation between the measured temperature and the set temperature, on the basis, the temperature change rate of the return air temperature/the air supply temperature in the preset time length is obtained, and when the temperature change rate reaches a preset change rate node, corresponding balance adjustment is carried out on the load change of the compressor, for example, in a refrigeration mode, when the temperature change rate reaches a set negative node, the temperature is indicated to drop too fast (namely the load of the compressor is loaded too fast), and a sudden cooling phenomenon occurs, at this time, the compressor can be reversely controlled to unload a part of load, the aim of relieving the phenomenon of sudden cooling is achieved through a certain degree of return temperature, and the return air temperature/air supply temperature is stably changed to the temperature set by a user. Therefore, the stability of the change of the return air temperature/the air supply temperature is ensured, the hidden danger of sudden cold and sudden heat is eliminated, and the comfort level 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, particularly relate to a kind of duty control method and device.
Background technology
At present, magnetic suspension water-cooled cold-hot wind air-conditioner general only simply set by return air temperature or wind pushing temperature and user the load of temperature difference relation to compressor of temperature increase, down control, to reach the object of control return air temperature or wind pushing temperature.
Such as, under refrigeration mode, when the temperature that return air temperature or wind pushing temperature set higher or lower than user, air-conditioner passes through the load correspondingly increasing or reduce compressor, until return air temperature or wind pushing temperature conform to design temperature.This kind of control method, does not consider the stationarity of variations in temperature, can not regulate in real time according to the input load of the refrigeration requirement of user's reality to compressor, easily occurs the phenomenon that wind pushing temperature change is too fast, sometimes hot and sometimes cold, thus have impact on the comfort level of user.
In prior art, owing to only controlling according to return air temperature/wind pushing temperature and the load of design temperature temperature difference relation to compressor, easily occurring that wind pushing temperature is dashed forward cold or prominent heat, while reducing users'comfort, also exist compressor load add unloading not steadily (load variations is too fast: load too fast or carry unload too fast) hidden danger, the service life of magnetic suspension compressor can be affected, and then affect the reliability of unit.
Based on this, the present embodiment is except changing the foundation of balance adjustment as compressor load using the rate of temperature change of return air temperature/wind pushing temperature, also simultaneously using the foundation of the load changing rate of compressor as balance adjustment, wherein, load changing rate is specially the physical quantity characterizing compressor load change speed.
The load changing rate process that this step obtains magnetic suspension compressor is as follows:
Obtain magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Utilize formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
S106: according to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation preset, carry out balance adjustment to the load variations of magnetic suspension compressor.
With reference to figure 5, under refrigeration mode, according to rate of temperature change and load changing rate to the principle that the load variations of magnetic suspension compressor carries out balance adjustment be:
S501: judge rate of temperature change and the relation of rate of temperature change node preset.
S502: judge load changing rate and the relation of load changing rate node preset.
S503: work as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2.
S504: work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1.
S505: work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2.
S506: work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1.
S507: work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1.
Particularly, 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 k
t≤-1 and k
qwhen>=1, characterize cooling too fast, the load on of compressor is too fast, and load changing rate has reached the rate of change node of setting, now considers variations in temperature and load variations, controls magnetic suspension compressor unloading one and is greater than X
1load X
2, while realizing rising again, relatively large degree ground carries out balance adjustment to the load variations of compressor, to protect compressor not damaged; Work as k
t≤-1 and 0<k
qduring <1, characterize cooling too fast, but the discharge rate of magnetic suspension compressor does not reach the node of setting, therefore only carries out balance adjustment from the angle of rate of temperature change to the load variations of compressor, now, control compressor unloading load X
1.
Work as k
t>=1 and k
qwhen≤-1, heat up too fast, and the unloading of the load of compressor is too fast, has reached the load changing rate node of setting, has now considered variations in temperature and load variations, control magnetic suspension compressor loads one and is greater than Y
1load Y
2, protection compressor is not damaged; Work as k
t>=1 and-1<k
qduring <0, heat up too fast, but the discharge rate of compressor does not reach the node of setting, now, only carries out balance adjustment from the angle of rate of temperature change to the load variations of compressor, controls compressor loads load Y
1.
As-1<k
tduring <1, the speed of variations in temperature is moderate, and because the load variations of variations in temperature with compressor is echoed mutually, the load variations speed of acquiescence compressor is moderate, now, does not need to carry out balance adjustment to the load variations of magnetic suspension compressor.
With reference to figure 6, under heating mode, according to rate of temperature change and load changing rate to the principle that the load variations of magnetic suspension compressor carries out balance adjustment be:
S601: judge rate of temperature change and the relation of rate of temperature change node preset.
S502: judge load changing rate and the relation of load changing rate node preset.
S603: work as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2.
S604: work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1.
S605: work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2.
S606: work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1.
S607: work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
The balancing the load Principles of Regulation heating situation are relative with the balancing the load Principles of Regulation in refrigeration situation, elaboration of specifically no longer illustrating.
Step S104 in the step S105 of the present embodiment and S106 and embodiment one can respectively as the Liang Tao branch of the inventive method, when embody rule is of the present invention, branch S104 can be adopted to be only with reference to regulating the load variations of compressor with rate of temperature change from main separation, or adopt branch S105 and S106 simultaneously with rate of temperature change, load changing rate for reference to carrying out balance adjustment to the load variations of compressor.
The present embodiment ensure that return air temperature/wind pushing temperature steady change, while improving users'comfort, ensure that the load of magnetic suspension compressor can carry out adding unloading reposefully, improves the reliability of unit operation.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of duty control method and device, to overcome prior art because not regulating in real time according to the input load of the refrigeration requirement of user's reality to compressor, and the wind pushing temperature caused dash forward cold prominent heat, variations in temperature not steadily, shortcoming that the comfortable Experience Degree of user is low.
For this reason, the present invention's openly following technical scheme:
A kind of duty control method, comprising:
Obtain 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;
When described observed temperature is different from described design temperature, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls;
Obtain in preset duration corresponding to observed temperature rate of temperature change;
When described rate of temperature change reaches the relevant temperature rate of change node preset, corresponding balance adjustment is carried out to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
Said method, preferably, described when observed temperature is different from described design temperature, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls, and comprising:
Under refrigeration mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load;
Under heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
Said method, preferably, in described acquisition preset duration corresponding to observed temperature rate of temperature change, comprising:
Obtain described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Utilize formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
Said method, preferably, described according to described rate of temperature change and the rate of temperature change size of node relation preset, balance adjustment is carried out to the load variations of magnetic suspension compressor and comprises:
Under refrigeration mode, work as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1; Work as k
tduring>=B, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0;
Under heating mode, work as k
tduring≤C, control magnetic suspension compressor and load load Z
1; Work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0.
Said method, preferably, also comprises:
Obtain magnetic suspension compressor in described preset duration load changing rate;
According to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation preset, balance adjustment is carried out to the load variations of magnetic suspension compressor.
Said method, preferably, in the described preset duration of described acquisition magnetic suspension compressor load changing rate, comprising:
Obtain magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Utilize formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
Said method, preferably, described according to rate of temperature change and the rate of temperature change size of node relation that presets, and load changing rate and the load changing rate size of node relation that presets, balance adjustment is carried out to the load variations of magnetic suspension compressor, comprising:
Under refrigeration mode, work as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2, work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1; Work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2, work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1;
Under heating mode, work as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2, work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1; Work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2, work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
A kind of load control unit, comprises temperature acquisition module, control module, rate of temperature change acquisition module 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 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, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls;
Described rate of temperature change acquisition module, for obtain in preset duration corresponding to observed temperature rate of temperature change;
Described first correction module, for according to described rate of temperature change and the rate of temperature change size of node relation preset, carries out balance adjustment to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
Said apparatus, preferably, described control module comprises:
Refrigeration control unit, in cooling mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carries out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load;
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
Said method, preferably, described rate of temperature change acquisition module comprises:
Temperature acquiring unit, for obtaining described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Rate of temperature change computing unit, for utilizing formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
Said method, preferably, described first correction module, comprising:
First refrigeration correcting unit, in cooling mode, works as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1; Work as k
tduring>=B, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0;
First heats correcting unit, in a heating mode, works as k
tduring≤C, control magnetic suspension compressor and load load Z
1; Work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0.
Said method, preferably, also comprises:
Load changing rate acquisition module, for obtain magnetic suspension compressor in described preset duration load changing rate k
q;
Second correction module, for according to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation that presets, balance adjustment is carried out to the load variations of magnetic suspension compressor.
Said method, preferably, described load changing rate acquisition module comprises:
Load obtaining unit, for obtaining magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t1 is the starting point moment of described preset duration;
Load changing rate computing unit, for utilizing formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
Said method, preferably, described second correction module comprises:
Second refrigeration correcting unit, in cooling mode, works as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2, work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1; Work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2, work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, not to the load variations of magnetic suspension compressor and k
q>=F balance adjustment; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1;
Second heats correcting unit, in a heating mode, works as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2, work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1; Work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2, work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
To sum up, duty control method disclosed by the invention and device, survey return air temperature or wind pushing temperature different from the design temperature of user time, first the load of temperature difference relation to compressor according to observed temperature and design temperature controls, on this basis, obtain the rate of temperature change of return air temperature/wind pushing temperature in preset duration, and when rate of temperature change reaches default rate of change node, corresponding balance adjustment is carried out to the load variations of compressor, such as, under refrigeration mode, when rate of temperature change reaches the negative nodal point of setting, characterize temperature and decline too fast (namely compressor load loads too fast), occur neglecting cold phenomenon, now, can it be made to unload a part of load by Reverse Turning Control compressor, by the object reaching and alleviate and neglect cold phenomenon of rising again to a certain degree, make the temperature that return air temperature/wind pushing temperature smooth change sets to user.Visible, this invention ensures that the stationarity of return air temperature/wind pushing temperature change, eliminate prominent cold prominent hot hidden danger, improve the comfort level of user.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
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 the flow chart that the load variations of rate of temperature change to compressor regulates under refrigeration mode disclosed in the embodiment of the present invention one;
Fig. 3 is according to the flow chart that the load variations of rate of temperature change to compressor regulates under heating mode disclosed in the embodiment of the present invention one;
Fig. 4 is the another kind of flow chart of duty control method disclosed in the embodiment of the present invention two;
Fig. 5 is according to the flow chart that rate of temperature change, the load variations of load changing rate to compressor regulate under refrigeration mode disclosed in the embodiment of the present invention two;
Fig. 6 is according to the flow chart that rate of temperature change, the load variations of load changing rate to compressor regulate under heating mode disclosed in the embodiment of the present invention two;
Fig. 7 is a kind of structural representation of load control unit disclosed in the embodiment of the present invention three;
Fig. 8 is the another kind of structural representation of load control unit disclosed in the embodiment of the present invention three.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The present embodiment one discloses a kind of duty control method, can be used for controlling the load of magnetic suspension water-cooled cold-hot wind air-conditioner, and with reference to figure 1, described method can comprise the following steps:
S101: the design temperature obtaining 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.
Wherein, the temperature measuring device such as temperature sensor specifically can be adopted to measure return air temperature or wind pushing temperature.
S102: when described observed temperature is different from described design temperature, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls.
When the return air temperature of actual measurement or wind pushing temperature different from the design temperature of user time, need to control to adjust return air temperature or wind pushing temperature, it is made to be changed to temperature set by user, magnetic suspension water-cooled cold-hot wind air-conditioner adds Unloading Control especially by the load of its magnetic suspension compressor, realizes regulating return air temperature or wind pushing temperature.
This step, when observed temperature is different from the design temperature of user, first adds Unloading Control according to both load of temperature difference relation to magnetic suspension compressor.
Particularly, under refrigeration mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
Under heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
S103: obtain in preset duration corresponding to observed temperature rate of temperature change.
In the temperature difference relation according to the return air temperature of surveying or wind pushing temperature and user's design temperature, add on the basis of Unloading Control to the load of magnetic suspension compressor, for preventing steadily not occurring that return air temperature or wind pushing temperature change too fast because adding unloading, sometimes hot and sometimes cold phenomenon, invention defines physical quantity---the rate of temperature change of return air temperature or the wind pushing temperature change speed characterizing air-conditioner, and the rate of temperature change of foundation return air temperature or wind pushing temperature, real-time balance adjustment is carried out to the load variations of magnetic suspension compressor, to reach the object of the return air temperature/wind pushing temperature steadily controlling air-conditioner.
This step S103 especially by following Procedure Acquisition preset duration corresponding to observed temperature (i.e. return air temperature/wind pushing temperature) rate of temperature change:
Obtain described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the described starting point moment stating preset duration;
Utilize formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
S104: when described rate of temperature change reaches the relevant temperature rate of change node preset, carry out corresponding balance adjustment to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
With reference to figure 2, under refrigeration mode, concrete foundation rate of temperature change carries out following balance adjustment with the relation of the rate of temperature change node preset to the load variations of magnetic suspension compressor:
S201: judge rate of temperature change and the relation of rate of temperature change node preset.
S202: work as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1.
S203: work as k
tduring>=B, control magnetic suspension compressor and load load Y
1.
S204: work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0.
Particularly, under refrigeration mode, the rate of change node of setting for A=-1, B=1, namely when return air temperature/wind pushing temperature rate of temperature change lower than-1 or higher than 1 time, characterize its variations in temperature too fast, balance adjustment need be carried out to the load variations of magnetic suspension compressor.
Under refrigeration mode, k
twhen≤-1, characterize the design temperature that current actual temperature is less than user, air-conditioner is controlling return air temperature/wind pushing temperature and is lowering the temperature, and the rate of temperature change of return air temperature/wind pushing temperature has reached the minimum rate of change node-1 of setting, thus the load on of compressor is too fast, need carry out balance adjustment to it, now the present invention controls the load X of magnetic suspension compressor unloading one setting
1, oppositely balance with the loading velocity too fast to compressor, and then make return air temperature/wind pushing temperature carry out rising again to a certain degree, avoid occurring neglecting cold phenomenon.
With answering ground, under refrigeration mode, k
twhen>=1, heat up too fast, the rate of debarkation of magnetic suspension compressor is too fast, and now, the present invention controls the load Y that magnetic suspension compressor loads a setting
1, oppositely balance with the discharge rate too fast to compressor, make return air temperature/wind pushing temperature carry out rising again to a certain degree, avoid occurring neglecting thermal phenomenon.And-1<k
tduring <1, the rate of temperature change of return air temperature/wind pushing temperature does not reach the change node of setting, and the speed of variations in temperature is moderate, and user awareness is comparatively comfortable, without the need to carrying out balance adjustment to the load variations of magnetic suspension compressor.
With reference to figure 3, under heating mode, following balance adjustment is carried out to the load variations of magnetic suspension compressor:
S301: judge rate of temperature change and the relation of rate of temperature change node preset.
S302: work as k
tduring≤C, control magnetic suspension compressor and load load Z
1.
S303: work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1.
S304: work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0
Under heating mode, the rate of change node of setting is equally for C=-1, D=1.
Work as k
twhen≤-1, the return air temperature/wind pushing temperature cooling characterizing air-conditioner is too fast, and the rate of debarkation of magnetic suspension compressor is too fast, now, controls the load Z that magnetic suspension compressor loads a setting
1, oppositely balance with the discharge rate too fast to compressor, make return air temperature/wind pushing temperature carry out rising again to a certain degree, avoid occurring neglecting cold phenomenon.
Work as k
twhen>=1, the return air temperature/wind pushing temperature characterizing air-conditioner heats up too fast, and the loading speed of magnetic suspension compressor is too fast, now, controls the load U of magnetic suspension compressor unloading one setting
1, oppositely balance with the loading velocity too fast to compressor, make return air temperature/wind pushing temperature carry out rising again to a certain degree, avoid occurring neglecting thermal phenomenon.And at-1<k
tduring <1, the variations in temperature of air-conditioner is moderate, without the need to regulating the load variations speed of magnetic suspension compressor.
It should be noted that, X
1, Y
1, Z
1, U
1value can formulate according to the corresponding relation of the variations in temperature of return air temperature/wind pushing temperature and magnetic suspension compressor load variations, can reach and balance adjustment has been carried out to the load variations of magnetic suspension compressor, and then the variations in temperature of return air temperature/wind pushing temperature is tended to be steady, the comfort level that can improve user is as the criterion.
When embody rule is of the present invention, described preset duration can be set as a less duration, such as be set as the duration of level rank second such as 2s, 5s or shorter rank, to realize by utilizing the rate of temperature change of the inventive method to return air temperature/wind pushing temperature to calculate in real time, and the load variations of magnetic suspension compressor is regulated in real time, reach the object making return air temperature/wind pushing temperature smooth change to design temperature.
To sum up, duty control method disclosed by the invention and device, survey return air temperature or wind pushing temperature different from the design temperature of user time, first the load of temperature difference relation to compressor according to observed temperature and design temperature controls, on this basis, obtain the rate of temperature change of return air temperature/wind pushing temperature in preset duration, and when rate of temperature change reaches default rate of change node, corresponding balance adjustment is carried out to the load variations of compressor, such as, under refrigeration mode, when rate of temperature change reaches the negative nodal point of setting, characterize temperature and decline too fast (namely compressor load loads too fast), occur neglecting cold phenomenon, now, can it be made to unload a part of load by Reverse Turning Control compressor, by the object reaching and alleviate and neglect cold phenomenon of rising again to a certain degree, make the temperature that return air temperature/wind pushing temperature smooth change sets to user.Visible, this invention ensures that the stationarity of return air temperature/wind pushing temperature change, eliminate prominent cold prominent hot hidden danger, improve the comfort level of user.
Embodiment two
The present embodiment two continues to improve the duty control method of embodiment one.With reference to figure 4, described method also comprises:
S105: obtain magnetic suspension compressor in described preset duration load changing rate.
Embodiment three
The present embodiment three discloses a kind of load control unit, and this device is corresponding with duty control method disclosed in embodiment one and embodiment two.
First, corresponding to embodiment one, with reference to figure 7, described device comprises 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 observed 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, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls.
Wherein, control module 200 comprises refrigeration control unit and heats control unit.
Refrigeration control unit, in cooling mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carries out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load;
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
Rate of temperature change acquisition module 300, for obtain in preset duration corresponding to observed temperature rate of temperature change.
Wherein, rate of temperature change acquisition module 300 comprises temperature acquiring unit and rate of temperature change computing unit.
Temperature acquiring unit, for obtaining described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Rate of temperature change computing unit, for utilizing formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
First correction module 400, for according to described rate of temperature change and the rate of temperature change size of node relation preset, carries out balance adjustment to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
Wherein, the first correction module 400 comprises the first refrigeration correcting unit and first and heats correcting unit.
First refrigeration correcting unit, in cooling mode, works as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1; Work as k
tduring>=B, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0;
First heats correcting unit, in a heating mode, works as k
tduring≤C, control magnetic suspension compressor and load load Z
1; Work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0.
Corresponding to embodiment two, described device also comprises 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 changing rate k
q.
Wherein, load changing rate acquisition module 500 comprises Load obtaining unit and load changing rate computing unit.
Load obtaining unit, for obtaining magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Load changing rate computing unit, for utilizing formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
Second correction module 600, for according to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation that presets, balance adjustment is carried out to the load variations of magnetic suspension compressor.
Wherein, the second correction module 600 comprises the second refrigeration correcting unit and second and heats correcting unit.
Second refrigeration correcting unit, in cooling mode, works as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2, work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1; Work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2, work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1;
Second heats correcting unit, in a heating mode, works as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2, work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1; Work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2, work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
For load control unit disclosed in the embodiment of the present invention three, because it is corresponding with duty control method disclosed in above embodiment one and embodiment two, so description is fairly simple, relevant similarity refers to the explanation of duty control method part in embodiment one and embodiment two, no longer describes in detail herein.
In sum, the present invention by with rate of temperature change and load changing rate for reference to carrying out balance adjustment to the load variations of magnetic suspension compressor, achieve according to the actual refrigeration requirement of client, the input load of magnetic suspension compressor is regulated in real time, control hommization more, in guarantee return air temperature/wind pushing temperature smooth change, eliminate prominent cold prominent hot hidden danger, while improving the comfort level of user, what 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, the preferred span of negative nodal point A, C, E is [-5,0), the preferred span of positive node B, D, F be (0,5], when practical application is of the present invention, under the prerequisite not departing from the application's spirit or scope, those skilled in the art can carry out sets itself according to the value of actual conditions to rate of temperature change node and load changing rate node of variations in temperature and load variations.
It should be noted that, each embodiment in this description all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (14)
1. a duty control method, is characterized in that, comprising:
Obtain 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;
When described observed temperature is different from described design temperature, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls;
Obtain in preset duration corresponding to observed temperature rate of temperature change;
When described rate of temperature change reaches the relevant temperature rate of change node preset, corresponding balance adjustment is carried out to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
2. method according to claim 1, is characterized in that, described when observed temperature is different from described design temperature, and the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls, and comprising:
Under refrigeration mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load;
Under heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
3. method according to claim 2, is characterized in that, in described acquisition preset duration corresponding to observed temperature rate of temperature change, comprising:
Obtain described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Utilize formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
4. method according to claim 3, is characterized in that, described according to described rate of temperature change and the rate of temperature change size of node relation preset, and carries out balance adjustment comprise the load variations of magnetic suspension compressor:
Under refrigeration mode, work as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1; Work as k
tduring>=B, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0;
Under heating mode, work as k
tduring≤C, control magnetic suspension compressor and load load Z
1; Work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0.
5. method according to claim 3, is characterized in that, also comprises:
Obtain magnetic suspension compressor in described preset duration load changing rate;
According to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation preset, balance adjustment is carried out to the load variations of magnetic suspension compressor.
6. method according to claim 5, is characterized in that, in the described preset duration of described acquisition magnetic suspension compressor load changing rate, comprising:
Obtain magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Utilize formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
7. method according to claim 6, it is characterized in that, described according to rate of temperature change and the rate of temperature change size of node relation preset, and load changing rate and the load changing rate size of node relation that presets, balance adjustment is carried out to the load variations of magnetic suspension compressor, comprising:
Under refrigeration mode, work as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2, work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1; Work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2, work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1;
Under heating mode, work as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2, work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1; Work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2, work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
8. a load control unit, is characterized in that, comprises temperature acquisition module, control module, rate of temperature change acquisition module 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 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, the load of temperature difference relation to magnetic suspension compressor according to described observed temperature and described design temperature controls;
Described rate of temperature change acquisition module, for obtain in preset duration corresponding to observed temperature rate of temperature change;
Described first correction module, for according to described rate of temperature change and the rate of temperature change size of node relation preset, carries out balance adjustment to the load variations of magnetic suspension compressor, to make described return air temperature or wind pushing temperature smooth change.
9. device according to claim 8, is characterized in that, described control module comprises:
Refrigeration control unit, in cooling mode, when described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carries out load on; When described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load;
Heat control unit, in a heating mode, when described observed temperature is less than described design temperature, controls magnetic suspension compressor and carry out load on; When described observed temperature is greater than described design temperature, controls magnetic suspension compressor and carry out load unloading; When described observed temperature equals described design temperature, control magnetic suspension compressor and maintain former load.
10. device according to claim 9, is characterized in that, described rate of temperature change acquisition module comprises:
Temperature acquiring unit, for obtaining described preset duration terminal moment t
2corresponding observed temperature T
t2, and obtain the mean temperature T of the observed temperature in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Rate of temperature change computing unit, for utilizing formula k
t=(T
t2-T
(t2-t1))/(t
2-t
1) calculate in preset duration corresponding to observed temperature rate of temperature change k
t.
11. devices according to claim 10, is characterized in that, described first correction module, comprising:
First refrigeration correcting unit, in cooling mode, works as k
tduring≤A, control magnetic suspension compressor unloaded loads amount X
1; Work as k
tduring>=B, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, A, B, X
1, Y
1be real number, and A<0, B>0, X
1>0, Y
1>0;
First heats correcting unit, in a heating mode, works as k
tduring≤C, control magnetic suspension compressor and load load Z
1; Work as k
tduring>=D, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, C, D, Z
1, U
1be real number, and C<0, D>0, Z
1>0, U
1>0.
12. devices according to claim 10, is characterized in that, also comprise:
Load changing rate acquisition module, for obtain magnetic suspension compressor in described preset duration load changing rate k
q;
Second correction module, for according to described rate of temperature change and the rate of temperature change size of node relation that presets, and described load changing rate and the load changing rate size of node relation that presets, balance adjustment is carried out to the load variations of magnetic suspension compressor.
13. devices according to claim 12, is characterized in that, described load changing rate acquisition module comprises:
Load obtaining unit, for obtaining magnetic suspension compressor at described preset duration terminal moment t
2time load Q
t2, and obtain the average load Q of the magnetic suspension compressor load in described preset duration corresponding to each predetermined time
(t2-t1), wherein, t
1for the starting point moment of described preset duration;
Load changing rate computing unit, for utilizing formula k
q=(Q
t2-Q
(t2-t1))/(t
2-t
1) calculate the load changing rate k of magnetic suspension compressor in preset duration
q.
14. devices according to claim 13, is characterized in that, described second correction module comprises:
Second refrigeration correcting unit, in cooling mode, works as k
t≤ A and k
qduring>=F, control magnetic suspension compressor unloaded loads amount X
2, work as k
t≤ A and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount X
1; Work as k
t>=B and k
qduring≤E, control magnetic suspension compressor and load load Y
2, work as k
t>=B and E<k
qduring <0, control magnetic suspension compressor and load load Y
1; Work as A<k
tduring <B, not to the load variations of magnetic suspension compressor and k
q>=F balance adjustment; Wherein, E, F, X
2, Y
2be real number, and E<0, F>0, X
2>X
1, Y
2>Y
1;
Second heats correcting unit, in a heating mode, works as k
t≤ C and k
qduring≤E, control magnetic suspension compressor and load load Z
2, work as k
t≤ C and E<k
qduring <0, control magnetic suspension compressor and load load Z
1; Work as k
t>=D and k
qduring>=F, control magnetic suspension compressor unloaded loads amount U
2, work as k
t>=D and 0<k
qduring <F, control magnetic suspension compressor unloaded loads amount U
1; Work as C<k
tduring <D, balance adjustment is not carried out to the load variations of magnetic suspension compressor; Wherein, Z
2, U
2be real number, and Z
2>Z
1, U
2>U
1.
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|---|---|---|---|
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|---|---|---|---|
| CN201410549349.0A CN104236023B (en) | 2014-10-16 | 2014-10-16 | Load control method and device |
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