CN108317702B - Air conditioner and air conditioner load control method and device thereof - Google Patents
Air conditioner and air conditioner load control method and device thereof Download PDFInfo
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- CN108317702B CN108317702B CN201810114158.XA CN201810114158A CN108317702B CN 108317702 B CN108317702 B CN 108317702B CN 201810114158 A CN201810114158 A CN 201810114158A CN 108317702 B CN108317702 B CN 108317702B
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Abstract
The invention discloses an air conditioner and an air conditioner load control method and device thereof. The method comprises the following steps: receiving a target air supply temperature input by a user; acquiring the current air-out dry bulb temperature and the current air-out wet bulb temperature; and adjusting the current unit load according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature. The invention can accurately determine the relation between the air supply temperature and the actual output load by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature; the user requirement and the actual unit load are in a good corresponding relation, and therefore the unit operation is more stable.
Description
Technical Field
The invention relates to the field of air conditioner control, in particular to an air conditioner and an air conditioner load control method and device thereof.
background
the market of the current large-cooling-capacity frequency conversion commercial water-cooling air cooler units has appeared in a large number, most of control schemes are simpler from the aspect of load control and are just opposite to a single control target, so that a lot of labor and time can be saved from the design and manufacture direction of the unit, but from the other aspect, the user experience and the control sensitivity are not particularly good.
For example, the air supply temperature deviation control adopted by many current units is directly controlled aiming at the air supply temperature target, the control mode can be used naturally, the mode is simple, the output load is directly controlled, but the problem is that the air is different from a single phase body of water, two indexes of humidity and dryness exist, and the two indexes simultaneously determine the enthalpy value and the load output.
disclosure of Invention
In view of the above technical problems, the present invention provides an air conditioner and an air conditioner load control method and apparatus thereof, which can accurately determine the relationship between the supply air temperature and the actual output load by using the composite deviation control of the wet bulb temperature and the dry bulb temperature.
According to an aspect of the present invention, there is provided an air conditioning load control method including:
Receiving a target air supply temperature input by a user;
Acquiring the current air-out dry bulb temperature and the current air-out wet bulb temperature;
and adjusting the current unit load according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature.
In an embodiment of the present invention, the adjusting the current unit load according to the target air supply temperature, the current air outlet dry bulb temperature, and the current air outlet wet bulb temperature includes:
determining an air outlet temperature difference according to the target air supply temperature and the current air outlet dry bulb temperature;
Determining a temperature and humidity difference according to the current air outlet dry bulb temperature and the current air outlet wet bulb temperature;
Determining the temperature change rate according to the current air-out wet bulb temperature and the air-out wet bulb temperature before the preset time interval;
and adjusting the current unit load according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate.
in an embodiment of the present invention, the adjusting the current unit load according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate includes:
Judging whether the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is greater than or equal to a first preset value or not;
And if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a first preset value, increasing the load of the current unit.
In an embodiment of the present invention, the adjusting the current unit load according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate further includes:
If the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a first preset value, judging whether the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value, wherein the second preset value is smaller than the first preset value;
if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value, keeping the current unit load unchanged;
And if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a second preset value, reducing the load of the current unit.
in an embodiment of the present invention, the increasing the current unit load includes:
determining load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate;
And increasing the load of the current unit by the load variable quantity.
In an embodiment of the present invention, the reducing the current unit load includes:
Determining load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate;
and reducing the load of the current unit by the load variable quantity.
In one embodiment of the invention, the method further comprises:
Judging whether the current unit load reaches the highest load or not;
And if the current unit load reaches the highest load, keeping the current load running.
in one embodiment of the invention, the method further comprises:
Judging whether the current unit load reaches the lowest load or not;
If the current unit load reaches the lowest load, after the lowest load is kept running for a preset time, judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is smaller than or equal to a third preset value, wherein the third preset value is smaller than a second preset value;
And if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value, closing the unit.
according to another aspect of the present invention, there is provided an air conditioning load control device including:
the air supply temperature receiving module is used for receiving the target air supply temperature input by a user;
The current temperature acquisition module is used for acquiring the current air-out dry bulb temperature and the current air-out wet bulb temperature;
And the load adjusting module is used for adjusting the current unit load according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature.
in one embodiment of the invention, the load adjustment module comprises:
The air outlet temperature difference determining unit is used for determining air outlet temperature difference according to the target air supply temperature and the current air outlet dry bulb temperature;
the temperature and humidity difference determining unit is used for determining a temperature and humidity difference according to the current air outlet dry bulb temperature and the current air outlet wet bulb temperature;
The temperature change rate determining unit is used for determining the temperature change rate according to the current air-out wet bulb temperature and the air-out wet bulb temperature before the preset time interval;
and the load adjusting unit is used for adjusting the current unit load according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate.
In one embodiment of the present invention, the load adjusting unit includes:
The first judgment submodule is used for judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a first preset value or not;
and the first load adjustment submodule is used for increasing the load of the current unit under the condition that the first judgment submodule judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is greater than or equal to a first preset value.
In one embodiment of the present invention, the load adjusting unit further includes:
the second judgment submodule is used for judging whether the sum of the air-out temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value or not under the condition that the first judgment submodule judges that the sum of the air-out temperature difference, the temperature and humidity difference and the temperature change rate is smaller than the first preset value, wherein the second preset value is smaller than the first preset value;
The second load adjusting submodule is used for keeping the current unit load unchanged under the condition that the second judging submodule judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value;
And the third load adjustment submodule is used for reducing the load of the current unit under the condition that the second judgment submodule judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a second preset value.
In an embodiment of the present invention, the first load adjustment submodule is configured to determine a load variation according to an outlet air temperature difference, a temperature and humidity difference, and a temperature change rate; and increasing the load of the current unit by the load variable quantity.
In an embodiment of the present invention, the third load adjustment submodule is configured to determine a load variation according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate; and reducing the load of the current unit by the load variable quantity.
in one embodiment of the present invention, the load adjusting module further comprises:
The maximum load judging unit is used for judging whether the current unit load reaches the maximum load or not;
the load adjusting unit is also used for keeping the existing load running under the condition that the highest load judging unit judges that the current unit load reaches the highest load.
in one embodiment of the present invention, the load adjusting module further comprises:
the minimum load judging unit is used for judging whether the current unit load reaches the minimum load or not;
the load adjusting unit is also used for keeping the lowest load running under the condition that the lowest load judging unit judges that the current unit load reaches the lowest load;
the shutdown condition judging unit is used for judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value after the unit keeps the lowest load running for a preset time, wherein the third preset value is less than a second preset value;
and the shutdown unit is used for closing the unit under the condition that the shutdown condition judgment unit judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value.
according to another aspect of the present invention, there is provided an air conditioning load control device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method steps of any of the above embodiments when executing the program.
According to another aspect of the present invention, there is provided an air conditioner including the air conditioning load control device according to any one of the above embodiments.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions which, when executed by a processor, implement the air conditioning load control method according to any one of the above embodiments.
The invention can accurately determine the relation between the air supply temperature and the actual output load by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature; the user requirement and the actual unit load are in a good corresponding relation, and therefore the unit operation is more stable.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
fig. 1 is a schematic diagram of an embodiment of an air conditioner load control method according to the present invention.
Fig. 2 is a schematic diagram illustrating adjustment of a current unit load according to an outlet air dry bulb temperature and an outlet air wet bulb temperature in an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating adjustment of a current unit load according to an outlet air temperature difference, a temperature and humidity difference, and a temperature change rate in an embodiment of the present invention.
Fig. 4 is a control timing chart of an embodiment of the air conditioner load control method of the present invention.
Fig. 5 is a schematic diagram comparing the effect of the air conditioning load control method of the present invention and the conventional control method on adjusting the temperature of the supplied air.
Fig. 6 is a schematic diagram of an air conditioning load control device according to a first embodiment of the present invention.
FIG. 7 is a diagram of a load leveling module according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of a load adjustment unit according to an embodiment of the invention.
fig. 9 is a schematic diagram of a load adjustment module according to another embodiment of the invention.
Fig. 10 is a schematic diagram of an air conditioning load control device according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
in all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
it should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of an embodiment of an air conditioner load control method according to the present invention. Preferably, this embodiment may be performed by the air conditioning load control apparatus of the present invention. The method comprises the following steps:
Step 1, receiving a target air supply temperature Tm set and input by a user.
And 2, acquiring the current air-out dry bulb temperature T and the current air-out wet bulb temperature Ts.
And 3, adjusting the current unit load according to the target air supply temperature Tm, the current air-out dry bulb temperature T and the current air-out wet bulb temperature Ts, wherein the current unit load refers to the current compressor load output, namely the current compressor frequency.
Based on the air conditioner load control method provided by the embodiment of the invention, the wet bulb temperature and the dry bulb temperature are brought into the unit load regulation condition through the comprehensive consideration of the wet bulb temperature and the dry bulb temperature, and the load output can be accurately controlled, so that the stability of the unit in partial load operation is improved, the humidity and the dryness in the air are controlled under the acceptable range of a user, and the user experience is improved.
Fig. 2 is a schematic diagram illustrating adjustment of a current unit load according to an outlet air dry bulb temperature and an outlet air wet bulb temperature in an embodiment of the present invention. As shown in fig. 2, step 3 in the embodiment of fig. 1 may include:
And step 31, determining that the outlet air temperature difference delta T1 is T-Tm according to the target air supply temperature Tm and the current outlet air dry bulb temperature T.
and step 32, determining temperature and humidity difference delta T2 to be T-Ts according to the current air-out dry bulb temperature T and the current air-out wet bulb temperature Ts.
and step 33, determining the temperature change rate Δ T3 to be Tst-Ts (T- Δ T) according to the current outlet wet bulb temperature Ts and the outlet wet bulb temperature Ts (T- Δ T) before the preset time interval Δ T.
in one embodiment of the present invention, the predetermined time interval may be 10 s.
And step 34, adjusting the current unit load according to the air outlet temperature difference delta T1, the temperature and humidity difference delta T2 and the temperature change rate delta T3.
according to the embodiment of the invention, the composite deviation control of the wet bulb temperature and the dry bulb temperature is adopted, the current unit load can be specifically adjusted according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, the relation between the air supply temperature and the actual output load is accurately determined, the user requirement and the actual unit load are in a good corresponding relation, and therefore the unit operation is more stable. The embodiment of the invention optimizes the air quality and improves the use experience of users; the load output of the unit can more accurately meet the use requirements of users.
Fig. 3 is a schematic diagram illustrating adjustment of a current unit load according to an outlet air temperature difference, a temperature and humidity difference, and a temperature change rate in an embodiment of the present invention. As shown in fig. 3, step 34 in the embodiment of fig. 2 may include:
Step 341, judging whether the sum Δ T1+ Δ T2+ Δ T3 of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2 and the temperature change rate Δ T3 is greater than or equal to a first preset value or not in a preset period. If Δ T1+ Δ T2+ Δ T3 is greater than or equal to the first predetermined value, go to step 342; otherwise, if Δ T1+ Δ T2+ Δ T3 is less than the first predetermined value, step 343 is performed.
step 342, the current unit load F is increased.
In one embodiment of the present invention, step 342 may comprise:
In step 3421, a load variation Δ F is determined according to the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3.
And 3422, increasing the load variation delta F of the current unit load F.
According to the embodiment of the invention, the load increment can be determined according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, and a certain load increment is increased every time, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
Step 343, determining whether Δ T1+ Δ T2+ Δ T3 is greater than or equal to a second predetermined value at a predetermined period, wherein the second predetermined value is smaller than the first predetermined value; if Δ T1+ Δ T2+ Δ T3 is greater than or equal to the second predetermined value, go to step 344; otherwise, if Δ T1+ Δ T2+ Δ T3 is less than the second predetermined value, step 345 is performed.
And 344, keeping the current unit load F unchanged.
And step 345, reducing the load F of the current unit.
in one embodiment of the present invention, step 345 may comprise:
in step 3451, the load variation Δ F is determined according to the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2 and the temperature change rate Δ T3.
step 3452, the load variation Δ F of the current unit is reduced by the load F.
according to the embodiment of the invention, the load reduction amount can be determined according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, and a certain load reduction amount is reduced every time, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
In one embodiment of the present invention, step 3421 or step 3451 may include: and determining the load change quantity delta F according to a formula delta F ═ delta T1-alpha + delta T2-beta + delta T2-gamma, wherein alpha is a temperature difference correction coefficient, beta is a temperature change rate correction coefficient, and gamma is a temperature and humidity difference correction coefficient.
In one embodiment of the present invention, the predetermined period is 15s in the embodiment of fig. 3, the second predetermined value is-1 ℃, and the first predetermined value is 2 ℃.
that is, when Δ T1+ Δ T2+ Δ T3 is monitored to be equal to or higher than 2 ℃ every 15s, the unit load F increases by Δ F, that is, F is equal to F + Δ F.
When the temperature of delta T1+ delta T2+ delta T3 is monitored to be more than or equal to-1 and less than or equal to 2 ℃ every 15s, the load F of the unit is unchanged.
When the monitored temperature of delta T1+ delta T2+ delta T3 is less than or equal to minus 1 ℃ every 15s, the load F of the unit is reduced by delta F, namely F is equal to F-delta F.
According to the embodiment of the invention, the load of the unit can be determined to be increased or decreased by comparing the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate with the two threshold values, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
The embodiment of the invention solves the technical problem that the air outlet temperature can not intuitively reflect the user requirement in the prior art, and can accurately determine the relation between the air supply temperature and the actual output load by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature, so that the user requirement and the actual unit load are in a low-error corresponding relation, and the unit operation is more stable.
Fig. 4 is a control timing chart of an embodiment of the air conditioner load control method of the present invention. As shown in fig. 4, after the unit is powered on and the initialization process is completed, the unit is started, and the compressor is adjusted to 100% load step by step according to the actual working condition after the compressor is started to operate for 3min with the initial load.
Specifically, the air conditioning load control method shown in fig. 4 may include:
in the first stage, the unit is started
and (4) powering on the unit, controlling the compressor to work to the maximum load in the initialization process, and then closing the compressor.
Second stage, starting up the unit
The compressor was adjusted to initial load on and run for 2 minutes.
the third stage, the unit operation stage (0-100% load stage)
in the third stage, the present invention may control the unit load according to the air conditioning load control method described in any of the above embodiments (for example, any of fig. 1 to 3).
in an embodiment of the present invention, as shown in fig. 4, in the third stage, the air conditioning load control method may further include: judging whether the current unit load reaches the highest load or not; and if the current unit load reaches the highest load, keeping the current load running.
Therefore, the embodiment of the invention can ensure that the current unit load exceeds the highest load and keep the highest load running after the highest load is reached.
In an embodiment of the present invention, in the third stage, the air conditioning load control method may further include: judging whether the current unit load reaches the lowest load or not; if the current unit load reaches the minimum load, after the minimum load is kept running for a preset time (for example, 5 minutes), whether the delta T1+ the delta T2+ the delta T3 is smaller than or equal to a third preset value or not is judged, wherein the third preset value is smaller than a second preset value; and if the delta T1+ the delta T2+ the delta T3 is smaller than or equal to a third preset value, closing the unit.
in a specific embodiment of the present invention, the third predetermined value may be-2 ℃.
the embodiment of the invention can ensure that the load of the current unit is not lower than the lowest load, and the unit is closed in time when the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value after the unit reaches the lowest load preset time, namely the air outlet temperature of the air conditioner meets the requirements of users.
Fig. 5 is a schematic diagram illustrating the comparison between the air conditioner load control method of the present invention and the conventional control method for adjusting the supply air temperature (i.e., the current outlet dry bulb temperature T). As shown in fig. 5, the adjusting effect of the present invention is much smoother than that of the conventional method, and the above-mentioned embodiment of the present invention can precisely handle the load demand, and can avoid the problem of too much or too little load output, thereby precisely controlling the air supply temperature.
The air conditioner load control method provided by the embodiment of the invention can be suitable for a large variable-frequency cold air unit, and the embodiment of the invention can adjust the load output of the compressor in real time by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature so as to control the stable operation of the unit in the operating state.
fig. 6 is a schematic diagram of an air conditioning load control device according to a first embodiment of the present invention. As shown in fig. 6, the air conditioner load control device may include a supply air temperature receiving module 1, a current temperature acquiring module 2, and a load adjusting module 3, wherein:
And the air supply temperature receiving module 1 is used for receiving the target air supply temperature Tm input by the user.
And the current temperature acquisition module 2 is used for acquiring the current air-out dry bulb temperature T and the current air-out wet bulb temperature Ts.
and the load adjusting module 3 is used for adjusting the current unit load according to the target air supply temperature Tm, the current air-out dry bulb temperature T and the current air-out wet bulb temperature Ts.
based on the air conditioner load control device provided by the embodiment of the invention, the wet bulb temperature and the dry bulb temperature are brought into the load regulation condition of the unit by comprehensively considering the wet bulb temperature and the dry bulb temperature, and the load output can be accurately controlled, so that the stability of the unit in partial load operation is improved, the humidity and the dryness in the air are controlled under the acceptable range of a user, and the user experience is improved.
FIG. 7 is a diagram of a load leveling module according to an embodiment of the present invention. As shown in fig. 7, the load adjustment module 3 in the embodiment of fig. 6 may include an outlet air temperature difference determining unit 31, a temperature and humidity difference determining unit 32, a temperature change rate determining unit 33, and a load adjustment unit 34, where:
and the air outlet temperature difference determining unit 31 is configured to determine the air outlet temperature difference Δ T1 as T-Tm according to the target air supply temperature Tm and the current air outlet dry bulb temperature T.
and the temperature and humidity difference determining unit 32 is configured to determine a temperature and humidity difference Δ T2 ═ T-Ts according to the current air outlet dry bulb temperature T and the current air outlet wet bulb temperature Ts.
A temperature change rate determining unit 33, configured to determine a temperature change rate Δ T3 according to the current outlet wet bulb temperature Ts and the outlet wet bulb temperature Ts (T- Δ T) before the predetermined time interval Δ T
In an embodiment of the present invention, the temperature change rate determining unit 33 may specifically be configured to determine the temperature change rate Δ T3 according to the formula Δ T3 ═ Tst-Ts (T- Δ T).
And the load adjusting unit 34 is used for adjusting the current unit load according to the outlet air temperature difference delta T1, the temperature and humidity difference delta T2 and the temperature change rate delta T3.
according to the embodiment of the invention, the composite deviation control of the wet bulb temperature and the dry bulb temperature is adopted, the current unit load can be specifically adjusted according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, the relation between the air supply temperature and the actual output load is accurately determined, the user requirement and the actual unit load are in a good corresponding relation, and therefore the unit operation is more stable. The embodiment of the invention optimizes the air quality and improves the use experience of users; the load output of the unit can more accurately meet the use requirements of users.
Fig. 8 is a schematic diagram of a load adjustment unit according to an embodiment of the invention. As shown in fig. 8, the load adjusting unit 34 of the embodiment of fig. 7 may include a first determining sub-module 341 and a first load adjusting sub-module 342, wherein:
The first determining submodule 341 is configured to determine, at a predetermined period, whether the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is greater than or equal to a first predetermined value.
the first load adjusting submodule 342 is configured to increase the current unit load when the first determining submodule 341 determines that the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is greater than or equal to a first predetermined value.
In an embodiment of the invention, the first load adjusting submodule 342 may be configured to determine the load variation Δ F according to the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3; and increasing the load variation delta F of the current unit load F.
According to the embodiment of the invention, the load increment can be determined according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, and a certain load increment is increased every time, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
in an embodiment of the present invention, as shown in fig. 8, the load adjusting unit 34 may further include a second determining sub-module 343, a second load adjusting sub-module 344, and a third load adjusting sub-module 345, wherein:
the second determining submodule 343 is configured to determine, in a predetermined cycle, whether the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is greater than or equal to a second predetermined value, where the second predetermined value is smaller than the first predetermined value, when the first determining submodule 341 determines that the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is smaller than the first predetermined value.
in one embodiment of the present invention, the predetermined period is 15s in the embodiment of fig. 3, the second predetermined value is-1 ℃, and the first predetermined value is 2 ℃.
and the second load adjusting submodule 344 is configured to keep the current unit load unchanged when the second determining submodule 343 determines that the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is greater than or equal to a second predetermined value.
And the third load adjusting submodule 345 is configured to reduce the current unit load when the second determining submodule 343 determines that the sum of the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3 is smaller than a second predetermined value.
according to the embodiment of the invention, the load of the unit can be determined to be increased or decreased by comparing the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate with the two threshold values, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
In an embodiment of the present invention, the third load adjusting submodule 345 may be specifically configured to determine a load variation Δ F according to the outlet air temperature difference Δ T1, the temperature and humidity difference Δ T2, and the temperature change rate Δ T3; and reducing the load F of the current unit by the load variation delta F.
According to the embodiment of the invention, the load reduction amount can be determined according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate, and a certain load reduction amount is reduced every time, so that the relationship between the air supply temperature and the actual output load can be more accurately determined.
in an embodiment of the present invention, the first load adjusting submodule 342 or the third load adjusting submodule 345 may be specifically configured to determine the load variation Δ F according to a formula Δ F ═ Δ T1 ═ α + Δ T2 × + Δ T2 ×, where α is a temperature difference correction coefficient, β is a temperature change rate correction coefficient, and γ is a temperature and humidity difference correction coefficient.
The embodiment of the invention solves the technical problem that the air outlet temperature can not intuitively reflect the user requirement in the prior art, and can accurately determine the relation between the air supply temperature and the actual output load by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature, so that the user requirement and the actual unit load are in a low-error corresponding relation, and the unit operation is more stable.
Fig. 9 is a schematic diagram of a load adjustment module according to another embodiment of the invention. Compared with the embodiment of fig. 7, in the embodiment of fig. 9, the load adjustment module of the embodiment of fig. 6 may further include a highest load judgment unit 35:
A maximum load judgment unit 35, configured to judge whether the current unit load reaches a maximum load;
the load adjusting unit 34 is further configured to keep the existing load running if the maximum load judging unit 35 judges that the current unit load reaches the maximum load.
Therefore, the embodiment of the invention can ensure that the current unit load exceeds the highest load and keep the highest load running after the highest load is reached.
in an embodiment of the present invention, as shown in fig. 9, the load adjusting module may further include a lowest load determining unit 36, a shutdown condition determining unit 37, and a shutdown unit 38, where:
and a minimum load judgment unit 36, configured to judge whether the current unit load reaches a minimum load.
the load adjusting unit 34 is further configured to keep the minimum load operation when the minimum load determining unit 36 determines that the current unit load reaches the minimum load.
The shutdown condition determining unit 37 is configured to determine whether Δ T1+ Δ T2+ Δ T3 is less than or equal to a third predetermined value after the unit keeps running at the minimum load for a predetermined time (e.g., 5 minutes), where the third predetermined value is less than the second predetermined value.
and the shutdown unit 38 is configured to shut down the unit when the shutdown condition determining unit 37 determines that the sum Δ T1+ Δ T2+ Δ T3 of the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate is less than or equal to a third predetermined value.
in a specific embodiment of the present invention, the third predetermined value may be-2 ℃.
The embodiment of the invention can ensure that the load of the current unit is not lower than the lowest load, and the unit is closed in time when the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value after the unit reaches the lowest load preset time, namely the air outlet temperature of the air conditioner meets the requirements of users.
The adjusting effect of the embodiment of the invention is much more stable than that of the traditional mode, the embodiment of the invention can accurately process the load requirement, and can avoid the problem of too much or too little load output, thereby accurately controlling the air supply temperature.
the air conditioner load control method provided by the embodiment of the invention can be suitable for a large variable-frequency cold air unit, and the embodiment of the invention can adjust the load output of the compressor in real time by adopting the composite deviation control of the wet bulb temperature and the dry bulb temperature so as to control the stable operation of the unit in the operating state.
Fig. 10 is a schematic diagram of an air conditioning load control device according to a second embodiment of the present invention. As shown in fig. 10, the air conditioning load control device may include a memory 101, a processor 102, and a computer program stored in the memory 101 and executable on the processor 102, wherein the processor 102 implements the method steps of any of the above embodiments when executing the program.
Based on the air conditioner load control device provided by the embodiment of the invention, the wet bulb temperature and the dry bulb temperature are brought into the load regulation condition of the unit by comprehensively considering the wet bulb temperature and the dry bulb temperature, and the load output can be accurately controlled, so that the stability of the unit in partial load operation is improved, the humidity and the dryness in the air are controlled under the acceptable range of a user, and the user experience is improved.
According to another aspect of the present invention, there is provided an air conditioner including the air conditioning load control device according to any one of the above embodiments.
Based on the air conditioner provided by the embodiment of the invention, the current unit load can be adjusted according to the outlet air temperature difference, the temperature and humidity difference and the temperature change rate by adopting the composite deviation control of the wet-bulb temperature and the dry-bulb temperature, the relationship between the air supply temperature and the actual output load is accurately determined, the user requirement and the actual unit load are in a good corresponding relationship, and the unit operation is more stable. The embodiment of the invention optimizes the air quality and improves the use experience of users; the load output of the unit can more accurately meet the use requirements of users.
according to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions which, when executed by a processor, implement the air conditioning load control method according to any one of the above embodiments.
Based on the computer-readable storage medium provided by the above embodiment of the present invention, the current unit load can be adjusted specifically according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate by adopting the wet-bulb temperature and dry-bulb temperature composite deviation control, so that the relationship between the supply air temperature and the actual output load is accurately determined, the user demand and the actual unit load are in a good correspondence relationship, and the unit operation is more stable. The embodiment of the invention optimizes the air quality and improves the use experience of users; the load output of the unit can more accurately meet the use requirements of users.
The air conditioning load control devices described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the functions described herein.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (15)
1. An air conditioner load control method, comprising:
receiving a target air supply temperature input by a user;
Acquiring the current air-out dry bulb temperature and the current air-out wet bulb temperature;
adjusting the current unit load according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature, wherein the current unit load is the current compressor frequency;
wherein, the current unit load is adjusted according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature, and the adjustment comprises the following steps:
determining an air outlet temperature difference according to the target air supply temperature and the current air outlet dry bulb temperature;
Determining a temperature and humidity difference according to the current air outlet dry bulb temperature and the current air outlet wet bulb temperature;
determining the temperature change rate according to the current air-out wet bulb temperature and the air-out wet bulb temperature before the preset time interval;
adjusting the current unit load according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate;
Wherein the air conditioning load control method further comprises:
Judging whether the current unit load reaches the lowest load or not;
if the current unit load reaches the minimum load, after the minimum load is kept running for a preset time, judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value or not;
and if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value, closing the unit.
2. The method of claim 1, wherein the adjusting the current unit load according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate comprises:
Judging whether the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is greater than or equal to a first preset value or not;
and if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a first preset value, increasing the load of the current unit.
3. The method of claim 2, wherein the adjusting the current unit load according to the outlet air temperature difference, the temperature and humidity difference, and the temperature change rate further comprises:
If the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a first preset value, judging whether the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value, wherein the second preset value is smaller than the first preset value;
if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value, keeping the current unit load unchanged;
And if the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a second preset value, reducing the load of the current unit.
4. The method according to claim 2 or 3, wherein said increasing the current unit load comprises:
Determining load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate;
and increasing the load of the current unit by the load variable quantity.
5. the method of claim 3, wherein the reducing the current unit load comprises:
determining load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate;
And reducing the load of the current unit by the load variable quantity.
6. The method according to any one of claims 1-3, further comprising:
Judging whether the current unit load reaches the highest load or not;
And if the current unit load reaches the highest load, keeping the current load running.
7. an air conditioning load control device, characterized by comprising:
The air supply temperature receiving module (1) is used for receiving the target air supply temperature input by a user;
the current temperature acquisition module (2) is used for acquiring the current air-out dry bulb temperature and the current air-out wet bulb temperature;
The load adjusting module (3) is used for adjusting the current unit load according to the target air supply temperature, the current air-out dry bulb temperature and the current air-out wet bulb temperature, wherein the current unit load is the current compressor frequency;
Wherein the load adjustment module (3) comprises:
The air outlet temperature difference determining unit (31) is used for determining the air outlet temperature difference according to the target air supply temperature and the current air outlet dry bulb temperature;
The temperature and humidity difference determining unit (32) is used for determining a temperature and humidity difference according to the current air outlet dry bulb temperature and the current air outlet wet bulb temperature;
the temperature change rate determining unit (33) is used for determining the temperature change rate according to the current air-out wet bulb temperature and the air-out wet bulb temperature before the preset time interval;
The load adjusting unit (34) is used for adjusting the current unit load according to the air outlet temperature difference, the temperature and humidity difference and the temperature change rate;
Wherein the load adjustment module (3) further comprises:
The minimum load judging unit (36) is used for judging whether the current unit load reaches the minimum load or not;
The load adjusting unit (34) is also used for keeping the lowest load running under the condition that the lowest load judging unit (36) judges that the current unit load reaches the lowest load;
the shutdown condition judging unit (37) is used for judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value or not after the unit keeps the lowest load operation for a preset time;
and the shutdown unit (38) is used for shutting down the unit under the condition that the shutdown condition judgment unit (37) judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is less than or equal to a third preset value.
8. The arrangement according to claim 7, characterized in that the load adjustment unit (34) comprises:
The first judgment submodule (341) is used for judging whether the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a first preset value or not;
And the first load adjusting submodule (342) is used for increasing the current unit load under the condition that the first judging submodule (341) judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a first preset value.
9. the arrangement according to claim 8, characterized in that the load adjustment unit (34) further comprises:
the second judgment submodule (343) is used for judging whether the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is greater than or equal to a second preset value or not under the condition that the first judgment submodule (341) judges that the sum of the outlet air temperature difference, the temperature and humidity difference and the temperature change rate is smaller than the first preset value, wherein the second preset value is smaller than the first preset value;
the second load adjusting submodule (344) is used for keeping the current unit load unchanged under the condition that the second judging submodule (343) judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is larger than or equal to a second preset value;
and the third load adjusting submodule (345) is used for reducing the current unit load under the condition that the second judging submodule (343) judges that the sum of the air outlet temperature difference, the temperature and humidity difference and the temperature change rate is smaller than a second preset value.
10. The apparatus according to claim 8 or 9,
The first load adjustment submodule (342) is used for determining the load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate; and increasing the load of the current unit by the load variable quantity.
11. The apparatus of claim 9,
The third load adjustment submodule (345) is used for determining the load variation according to the air outlet temperature difference, the temperature and humidity difference and the temperature variation rate; and reducing the load of the current unit by the load variable quantity.
12. The arrangement according to any of the claims 7-9, characterized in that the load adjustment module (3) further comprises:
the maximum load judging unit (35) is used for judging whether the current unit load reaches the maximum load or not;
The load adjusting unit (34) is also used for keeping the existing load running under the condition that the highest load judging unit (35) judges that the current unit load reaches the highest load.
13. an air conditioning load control device comprising a memory (101), a processor (102) and a computer program stored on the memory (101) and executable on the processor (102), characterized in that the processor (102) implements the method steps of any of claims 1-6 when executing said program.
14. An air conditioner characterized by comprising the air conditioning load control device according to any one of claims 7 to 13.
15. A computer-readable storage medium storing computer instructions which, when executed by a processor, implement the air conditioning load control method according to any one of claims 1 to 6.
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| CN201710594616X | 2017-07-20 | ||
| CN201710594616.XA CN107270490A (en) | 2017-07-20 | 2017-07-20 | Air-conditioning and its air conditioner load control method and device |
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| CN108317702A CN108317702A (en) | 2018-07-24 |
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| CN201810112881.4A Active CN108317671B (en) | 2017-07-20 | 2018-02-05 | Air conditioner and air conditioner load control method and device thereof |
| CN201810114158.XA Active CN108317702B (en) | 2017-07-20 | 2018-02-05 | Air conditioner and air conditioner load control method and device thereof |
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| CN109140667B (en) * | 2018-07-16 | 2020-10-09 | 江苏天纳节能科技股份有限公司 | Intelligent setting method for air conditioner target |
| CN109445494B (en) * | 2018-10-10 | 2020-04-28 | 珠海格力电器股份有限公司 | Enthalpy difference laboratory dry-bulb working condition automatic control method |
| CN109489209A (en) * | 2018-10-11 | 2019-03-19 | 珠海格力电器股份有限公司 | Unit allocation method and apparatus |
| CN109612759B (en) * | 2018-12-19 | 2020-07-31 | 珠海格力电器股份有限公司 | Enthalpy difference laboratory wet bulb working condition automatic control method |
| CN112212470A (en) * | 2020-10-10 | 2021-01-12 | 武汉奇威特建安工程有限公司 | Centralized management system for energy-saving control of air-conditioning heating and ventilation project |
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| CN108317671B (en) | 2019-12-06 |
| CN108317671A (en) | 2018-07-24 |
| CN108317702A (en) | 2018-07-24 |
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