CN113203231B - Energy adjusting method and device for unit and unit - Google Patents
Energy adjusting method and device for unit and unit Download PDFInfo
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- CN113203231B CN113203231B CN202110498499.3A CN202110498499A CN113203231B CN 113203231 B CN113203231 B CN 113203231B CN 202110498499 A CN202110498499 A CN 202110498499A CN 113203231 B CN113203231 B CN 113203231B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides an energy adjusting method, an energy adjusting device and a unit, wherein the air supply temperature of the unit is detected within a preset period time; determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; and adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action, the adjusting time and the detected operation number of the variable frequency compressors. In the mode, firstly, the adjusting action and the adjusting time of the unit are determined according to the air supply temperature and the temperature change of the unit, and then the operation modes of the variable frequency compressors are adjusted according to the operation number, the adjusting action and the adjusting time of the compressors, so that the operation efficiency of the unit is the highest, the operation efficiency is improved, and the energy is saved.
Description
Technical Field
The invention relates to the technical field of variable frequency compressors, in particular to an energy adjusting method and device of a unit and the unit.
Background
The variable frequency compressor can adapt to different working conditions to operate by changing the operating frequency so as to meet the actual load fluctuation requirement. If only one inverter compressor is arranged in one unit, the optimal operation performance can be realized by controlling the operation frequency of the inverter compressor. If one unit has a plurality of variable frequency compressors, various operation combination forms are usually adopted to meet the actual load fluctuation requirement. In the related art, when one unit has a plurality of inverter compressors, one inverter compressor is usually loaded first, and another inverter compressor is loaded after a certain load is reached, and the operating frequency of each compressor may be the same or different, so that the unit cannot be operated at the optimal performance position, the operating efficiency is low, and the optimal energy-saving scheme cannot be achieved.
Disclosure of Invention
In view of this, the present invention provides an energy adjusting method, an energy adjusting device and an energy adjusting machine set for improving the operation efficiency of the machine set and further saving energy.
The embodiment of the invention provides an energy adjusting method of a unit, wherein the unit comprises a plurality of variable frequency compressors; the method comprises the following steps: detecting the air supply temperature of the unit within a preset period time; determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; detecting the running number of a plurality of variable frequency compressors in the current unit; and adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the operation quantity, the adjustment action and the adjustment time.
Further, according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time, the adjusting action and the adjusting time of the unit are determined, and the method comprises the following steps: comparing the air supply temperature with a first preset threshold value, and determining a target temperature interval of the air supply temperature from the first preset interval; the first preset threshold comprises a plurality of different temperature values; the first preset interval comprises a plurality of different temperature intervals; comparing the change value with a second preset threshold value, and determining a target change interval where the change value is located from the second preset interval; wherein the second preset threshold comprises a plurality of different variation values; the second preset interval comprises a plurality of different change intervals; and determining the adjusting action and the adjusting time from the preset corresponding relation according to the target temperature interval and the target change interval.
Further, the variation value is determined by: acquiring a first average value of a plurality of air supply temperatures detected in a first preset period before the preset period; acquiring a second average value of a plurality of air supply temperatures detected within a second preset period before the preset period; determining a difference value of the first average value and the second average value as a variation value.
Further, according to operation quantity, regulation action and regulation time, the step of the operational mode of many inverter compressors in the regulation unit includes: if the operation quantity is 1, adjusting the frequency of the running variable frequency compressor according to the adjusting action so as to enable the variable frequency compressor to run in the optimal operation interval; if the running number is not 1, adjusting the running modes of a plurality of variable frequency compressors in the unit according to the adjusting action and the adjusting time so as to enable each running variable frequency compressor to run in an optimal running interval; the optimal operation interval of each variable frequency compressor is preset, and the optimal operation interval is that the ratio of the refrigerating capacity to the power meets a target value.
Further, the adjusting act includes: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; the adjusting time comprises the following steps: a preset cycle time and half of the preset cycle time; if the operation number is not 1, adjusting the operation modes of a plurality of variable frequency compressors in the unit based on the adjustment action and the adjustment time so as to enable each variable frequency compressor in operation to operate in the optimal operation interval, wherein the step comprises the following steps of: if the adjusting time is the preset cycle time, the following operations are executed aiming at each running variable frequency compressor: adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in an optimal running interval; if the adjusting time is half of the preset cycle time, adjusting the number of the running variable frequency compressors according to the adjusting action; for each running inverter compressor after the number is changed, the following operations are executed: and adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in the optimal running interval.
Further, if the adjusting time is half of the preset cycle time, the step of adjusting the number of the running inverter compressors according to the adjusting action comprises: if the adjusting action is high-speed loading or low-speed loading, a variable frequency compressor is additionally arranged; if the adjustment action is high-speed unloading or low-speed unloading, closing one variable-frequency compressor; if the adjustment action is taken as a hold, the running mode of the variable frequency compressor is kept.
Further, the adjusting act includes: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; according to the adjusting action, adjusting the frequency of the running inverter compressor so as to enable the inverter compressor to run in the optimal running range, and the method comprises the following steps: if the adjustment action is high-speed loading or high-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a first preset value so that the variable-frequency compressor runs in an optimal running range; if the adjustment action is low-speed loading or low-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a second preset value so that the variable-frequency compressor runs in an optimal running range; if the adjustment action is used as the maintenance, the running mode of the running variable frequency compressor is maintained; the first preset value is larger than the second preset value.
Further, after the step of adjusting the operation modes of the plurality of inverter compressors in the unit according to the operation number, the adjustment action and the adjustment time, the method further comprises the following steps: and saving the operation mode of the unit, wherein the operation mode comprises the operation parameters of the running variable frequency compressor.
The embodiment of the invention provides an energy regulating device of a unit, wherein the unit comprises a plurality of variable frequency compressors; the device comprises: the first detection module is used for detecting the air supply temperature of the unit within a preset period time; the determining module is used for determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; the second detection module is used for detecting the operation quantity of a plurality of variable frequency compressors in the current unit; and the adjusting module is used for adjusting the operation modes of the plurality of variable frequency compressors in the unit according to the operation quantity, the adjusting action and the adjusting time.
An embodiment of the present invention provides a machine set, including: the energy regulating device of the unit of the second aspect further comprises a plurality of variable frequency compressors.
The embodiment of the invention has the following beneficial effects:
the invention provides an energy adjusting method, an energy adjusting device and a unit, wherein the air supply temperature of the unit is detected within a preset period time; determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; and adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action, the adjusting time and the detected operation number of the variable frequency compressors. In the method, the adjusting action and the adjusting time of the unit are determined according to the air supply temperature and the temperature change of the unit, and then the operation modes of the multiple variable frequency compressors are adjusted according to the operation number, the adjusting action and the adjusting time of the compressors, so that the operation efficiency of the unit is the highest, the operation efficiency is improved, and the energy is saved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of an energy adjustment method for a plant according to an embodiment of the present invention;
FIG. 2 is a performance parameter curve of an inverter compressor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an energy adjusting device of a unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a unit according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The existing compressor comprises two types of fixed frequency and variable frequency; the variable frequency compressor can adapt to different working conditions for operation by changing the operation frequency, more accords with the fluctuation requirement of actual load, and has lower operation power than the operation frequency of the fixed frequency compressor. If only one variable frequency compressor is arranged in one unit, the best performance can be realized only by controlling the frequency of the variable frequency compressor. If a unit has a plurality of variable frequency compressors, a plurality of operation combinations are usually available. In the related art, the control logic of a plurality of inverter compressors is simple, one inverter compressor is usually loaded first, another inverter compressor is loaded after a certain load is reached, the operation frequency of each compressor may be the same or different, the unit cannot be operated at the best performance position in the mode, the operation efficiency is low, and the optimal energy-saving scheme cannot be achieved. Based on the method, the device and the unit for regulating the energy of the unit, the technology can be applied to equipment comprising a plurality of variable frequency compressors, such as a refrigerating unit and the like.
To facilitate understanding of the present embodiment, a detailed description is first provided for an energy adjustment method of a plant disclosed in the embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102, detecting the air supply temperature of the unit within a preset period time;
the preset cycle time can be set according to actual needs, for example, 10 seconds, 15 seconds and the like; specifically, the air supply temperature of the unit can be detected in real time within a preset period time. It should be noted that if the detected supply air temperature fails, the return air temperature can be automatically detected.
Step S104, determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the variation value of the air supply temperature detected in a plurality of preset period times before the preset period time;
the air supply temperature may be a first air supply temperature detected within a preset period time, an average value of a plurality of air supply temperatures detected within the preset period time, an intermediate value of the plurality of air supply temperatures, and the like; the variation value may be a difference between the supply air temperatures detected during two predetermined cycle times prior to the predetermined cycle time, and generally represents a rate of change of the supply air temperature over a period of time. In actual implementation, when the air supply temperature is high, it indicates that the load at the end is large, and the compressor generally needs to be loaded, that is, the adjustment action is loading; when the air supply temperature is lower, the load at the tail end is smaller, and the compressor is generally required to be unloaded, namely, the adjustment action is unloading; the loading and unloading may be to adjust the frequency of the compressors, or to adjust the number of operating compressors, or to adjust the frequency of the compressors while adjusting the number of operating compressors. In addition, when the adjusting time is longer, the energy adjusting time is longer, and when the adjusting time is shorter, the energy adjusting time needs to be carried out on the unit quickly.
In general, the adjustment action and the adjustment time cannot be determined only according to the currently detected air supply temperature, and the change of the air supply temperature in a previous period of time needs to be considered; for example, when the detected supply air temperature is high, but the rate of change of the temperature indicates that the supply air temperature has decreased in the previous period, the adjustment action and the adjustment time need to be determined by comprehensively considering the currently detected supply air temperature and the change of the supply air temperature in the previous period, so that the determined adjustment action and the adjustment time are more reasonable.
S106, detecting the running quantity of a plurality of variable frequency compressors in the current unit;
because the number of the running variable frequency compressors is different, the running mode of the unit is affected, and therefore after the adjusting action and the adjusting time are determined, the running number of the multiple variable frequency compressors in the current unit needs to be detected. The number of the running variable frequency compressors is different, and different adjusting modes are correspondingly provided.
And S108, adjusting the operation modes of the plurality of variable frequency compressors in the unit according to the operation number, the adjustment action and the adjustment time.
In order to enable each running variable-frequency compressor to run in an optimal running interval, the specific running mode of the unit can be determined according to the running number, the regulating action and the running time. For example, when one variable frequency compressor in the current unit is running, performance parameters such as the rotating speed or the frequency of the variable frequency compressor can be directly adjusted according to the adjusting action; when a plurality of frequency conversion compressors in the current unit are running, the running mode of the running frequency conversion compressors is determined according to the size of the adjusting time, when the adjusting time is longer, the adjusting mode of slower frequency adjustment or rotating speed adjustment can be utilized, and when the adjusting time is shorter, the adjusting mode of more quickly increasing or reducing the number of the running frequency conversion compressors can be utilized. It should be noted that, after each adjustment, it is necessary to determine whether each running inverter compressor in the running mode is running in the optimal running interval of the inverter compressor. And if so, finishing the energy regulation of the unit.
The invention provides an energy adjusting method of a unit, which is characterized in that the air supply temperature of the unit is detected within a preset period time; determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; and adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action, the adjusting time and the detected operation number of the variable frequency compressors. In the method, the adjusting action and the adjusting time of the unit are determined according to the air supply temperature and the temperature change of the unit, and then the operation modes of the multiple variable frequency compressors are adjusted according to the operation number, the adjusting action and the adjusting time of the compressors, so that the operation efficiency of the unit is the highest, the operation efficiency is improved, and the energy is saved.
The present embodiment provides another method for adjusting energy of an air conditioning unit, where the embodiment is implemented on the basis of the above embodiment, and the embodiment mainly describes a specific implementation manner of the step of determining an adjustment action and an adjustment time of the air conditioning unit according to a variation value of an air supply temperature detected in a plurality of preset cycle times before the air supply temperature and the preset cycle time, and includes the following steps:
step 201, comparing the air supply temperature with a first preset threshold value, and determining a target temperature interval where the air supply temperature is located from the first preset interval; wherein the first preset threshold comprises a plurality of different temperature values; the first preset interval comprises a plurality of different temperature intervals;
the first preset threshold is determined based on a preset air supply temperature set value LTS, control precision D and a temperature difference DC which can be adjusted, wherein the first preset threshold comprises 6 different temperature values which are LTS-D-3DC, LTS-D-2DC, LTS-D-DC, LTS-D, LTS + D and LTS + D +1.5D respectively; the first preset interval consists of the 6 different temperature values, and the first preset interval comprises 7 different temperature intervals which are respectively (— infinity, LTS-D-3 DC), [ LTS-D-3DC, LTS-D-2 DC), [ LTS-D-2DC, LTS-D-DC), [ LTS-D-DC, LTS-D), [ LTS-D-DC, LTS-D), [ LTS-D, LTS + D), [ LTS + D, LTS + D +1.5 DC), [ LTS + D +1.5DC, + ∞); in actual implementation, the target temperature interval where the supply air temperature is located may be determined by comparing the value of the supply air temperature LT with a plurality of different temperature values.
Step 202, comparing the change value with a second preset threshold value, and determining a target change interval in which the change value is located from the second preset interval; wherein the second preset threshold comprises a plurality of different variation values; the second preset interval comprises a plurality of different change intervals;
the second preset threshold is usually preset according to actual needs and application scenarios, and includes 4 different variation values, which are-2, -1, and 2; the second preset interval is determined according to the 4 different variation values, and comprises 5 different variation intervals, namely (∞, -2), (2, -1), (1, 2), (2, and + ∞); in practical implementation, the target variation interval in which the variation value VT is located may be determined by comparing the magnitude of the variation value VT with a plurality of different variation values.
The above change value is determined by: acquiring a first average value of a plurality of air supply temperatures detected in a first preset period time before the preset period time; acquiring a second average value of a plurality of air supply temperatures detected within a second preset period before the preset period; determining a difference value of the first average value and the second average value as a variation value.
And step 203, determining an adjusting action and adjusting time from a preset corresponding relation according to the target temperature interval and the target change interval.
The preset correspondence is represented by the following table:
wherein Tc represents the preset cycle time, and a, b, c, d and e represent codes of different adjusting actions; a denotes high speed loading, b denotes low speed loading, c denotes hold, d denotes high speed unloading, e denotes low speed unloading, and the conditioning time includes 0.5 × Tc and Tc. In actual implementation, after the temperature interval of the blowing air temperature TL and the variation interval of the variation value VT are obtained, the corresponding adjustment action and the adjustment time can be obtained according to the table. For example, when the temperature zone where the blowing air temperature TL is located is LTS-D-2DC ≦ LT < LTS-D-DC and the variation zone of the variation value VT is 1 ≦ VT <2, the adjustment action may be obtained as the code a, i.e., high speed loading, and the adjustment time is 0.5 × tc.
In the above manner, a plurality of temperature intervals and change intervals are quantized through the blind temperature values and change values and are subdivided into each small interval, and then the adjustment action and the adjustment time are determined in each small interval, so that the energy output of the unit is smoother, and the system is more stable; and the load of the whole unit can be adjusted in an electrodeless way along with the change of the load at the tail end by adjusting the gradient, the minimum gradient of temperature change is realized, the comfort is highest, and the unit can run efficiently.
The embodiment provides another energy adjusting method for a unit, which is implemented on the basis of the above embodiment, and the embodiment mainly describes a specific implementation manner of a step of adjusting operation modes of a plurality of variable frequency compressors in the unit according to an operation number, an adjustment action and an adjustment time, and includes the following steps:
step 301, if the operation number is 1, adjusting the frequency of the running inverter compressor according to the adjustment action so as to enable the inverter compressor to run in the optimal operation interval;
specifically, if the adjustment action is used as loading, the frequency of the running variable frequency compressor can be increased, and when the frequency is increased once per liter, the power and the refrigerating capacity are calculated according to the current evaporation temperature Te, the condensation temperature Tc and the running rotating speed N. If the adjustment action is unloading, the frequency of the running variable frequency compressor can be reduced, and the power and the refrigerating capacity are calculated according to the current evaporation temperature Te, the condensation temperature Tc and the running rotating speed N once reduction is performed. Specifically, it can be calculated according to the following formula:
Y＝C 0 +C 1 Te+C 2 Tc+C 3 N+C 4 TeTc+C 5 TeN+C 6 TcN+C 7 Te^2+C 8 Tc^2+C 9 N^2+C 10 TeTcN+C 11 Te^2Tc+C 12 Te^2N+C 13 Te^3+C 14 Te Tc^2+C 15 Tc^2N+C 16 Tc^3+C 17 Te N^2+C 18 Tc N^2+C 19 n ^3 (formula 1); y can be mass flow, power, refrigerating capacity, running current, exhaust temperature and other parameters of the compressor; c 0 -C 19 Coefficients for each parameter; in general, each inverter compressor has multiple sets of parameter coefficients, and the target parameter coefficients, known evaporating temperature Te, condensing temperature Tc, and operating speed N are substituted into the above formula 1 to obtain the corresponding target parameters.
Taking a cereal wheel compressor ZPV0662E as an example, 20 coefficients C0-C19 of three parameters of mass flow, power and refrigerating capacity are as follows:
in practical implementation, each time the frequency of the inverter compressor is changed, the evaporation temperature Te, the condensation temperature Tc, the operation rotating speed N and the coefficients corresponding to the power and the refrigerating capacity of the inverter compressor are substituted into the formula 1, so that the power and the refrigerating capacity in the current operation state can be obtained, the ratio of the refrigerating capacity to the power is calculated, and if the target value is met, the inverter compressor is indicated to operate in the optimal operation range.
Step 302, if the number of running compressors is not 1, adjusting the running modes of a plurality of variable frequency compressors in the unit according to the adjusting action and the adjusting time so as to enable each running variable frequency compressor to run in an optimal running interval;
if the number of the running variable frequency compressors is not 1, due to the limitation of the adjusting time, whether the number of the running variable frequency compressors needs to be increased or decreased is judged according to the adjusting time, if not, the frequency of each running variable frequency compressor is increased or decreased in the same adjusting mode as that in the step S301, and then the ratio of the refrigerating capacity to the power of each running variable frequency compressor is calculated so that each running variable frequency compressor runs in the optimal running interval.
It should be noted that, if the number of operations is not 1, it may be determined whether the inverter compressor currently operating is in the optimal operation interval, and if so, the current operation mode is maintained; if not, adjusting the operation modes of the plurality of variable frequency compressors in the unit according to the adjusting action and the adjusting time so that each variable frequency compressor which is in operation operates in the optimal operation interval.
The optimal operation interval of each variable frequency compressor is preset, and the optimal operation interval is that the ratio of the refrigerating capacity to the power meets a target numerical value.
The target value can be set according to actual needs. Specifically, according to the above formula 1, the evaporation temperature Te, the condensation temperature Tc, and the operation speed N are collected by the sensors in real time, so that the corresponding performance parameters of the single compressor can be calculated. For the same working condition, such as evaporation temperature Te =15 ℃, condensation temperature Tc =40 ℃, COP (Coefficient Of Performance) Of the compressor corresponding to different rotating speeds N (1000-7200 RPM) generally has a certain rule, wherein COP is the ratio Of the refrigerating capacity Of the compressor to the input power (consumed electric power W); as shown in fig. 2, the compressor COP and the rpm N curve of the valley wheel compressor ZPV0662E in the above example; it can be seen from the graph that when the rotating speed N of the compressor is about 1500-4000 revolutions, the COP of the compressor under the working condition is calculated to meet the target value of 6.5.
The adjusting action comprises: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; the time adjustment comprises the following steps: a preset cycle time and half of the preset cycle time;
considering that the performance parameters corresponding to different operation quantities of a plurality of variable frequency compressors can change; the specific adjustment mode can be determined according to the adjustment time. Step 302, one possible implementation:
step 3021, if the adjustment time is the preset cycle time, performing the following operations for each running inverter compressor: adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in an optimal running interval;
the step of adjusting the frequency of the running inverter compressor according to the adjustment action so that the inverter compressor runs in the optimal running interval is the same as the implementation manner of the step 301, and is not described herein again.
Step 3022, if the adjusting time is half of the preset cycle time, adjusting the number of the running variable frequency compressors according to the adjusting action;
specifically, since the adjustment time is half of the preset cycle time, a quick response adjustment action is required, and the inverter compressor can be operated in the optimal operation interval by increasing or decreasing the number of the operating inverter compressors.
Step 3022, one possible implementation:
(1) If the adjusting action is high-speed loading or low-speed loading, a variable frequency compressor is additionally arranged;
(2) If the adjustment action is high-speed unloading or low-speed unloading, closing one variable-frequency compressor;
(3) If the adjustment action is taken as a hold, the running mode of the variable frequency compressor is kept.
After increasing or decreasing the number of the running inverter compressors, calculating the current total load smooth transition corresponding to the running inverter compressors, for example, increasing one compressor and reducing the load of the running inverter compressors; one compressor is reduced and the load of the operated compressor is increased. Therefore, after increasing or decreasing the number of the operating inverter compressors, the frequency of the already operating inverter compressors needs to be adjusted. The method is completed by the following steps.
Step 3023, for each running inverter compressor after the number is changed, executing the following operations: and adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in the optimal running interval.
In the steps 301, 3021, and 3023, the step of adjusting the frequency of the inverter compressor in operation according to the adjustment operation so that the inverter compressor operates in the optimal operation zone includes one possible embodiment:
(1) If the adjustment action is high-speed loading or high-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a first preset value so that the variable-frequency compressor runs in an optimal running range;
(2) If the adjusting action is low-speed loading or low-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a second preset value so as to enable the variable-frequency compressor to run in an optimal running range;
(3) If the adjustment action is used as a holding action, the running mode of the running variable frequency compressor is kept; wherein the first preset value is greater than the second preset value.
The first preset value may be 10% of the total frequency of the current inverter compressor; the second preset value may be 5% of the total frequency of the current inverter compressor.
In the mode, the load of the whole unit can be adjusted in an electrodeless way along with the change of the load at the tail end through step adjustment, so that the minimum temperature change gradient and the highest comfort are realized. Determining an obstructed adjusting mode through the operation number, the adjusting time and the adjusting action, wherein in each adjusting mode, aiming at each running variable frequency compressor, the COP under the working condition is calculated once when the frequency of the variable frequency compressor is changed once until each running variable frequency compressor reaches an optimal operation interval; by the mode, under each working condition, each compressor is output according to different load proportions, so that the COP of the whole unit is highest, the temperature change gradient is minimum, the real stepless regulation is realized, and the high-efficiency operation is realized.
Further, after the step of adjusting the operation modes of the plurality of inverter compressors in the unit according to the operation number, the adjustment action and the adjustment time, the method further comprises: and saving the operation mode of the unit, wherein the operation mode comprises the operation parameters of the running variable frequency compressor.
In order to enable the subsequent unit operation to quickly reach the optimal operation interval, the operation parameters under the working condition can be stored when the unit reaches the optimal operation interval; the running mode under the working condition can be directly obtained when the working condition of the subsequent unit running is the same as the working condition of the stored running mode, the unit is directly adjusted to the optimal running interval, and the running efficiency of the unit is further improved.
Corresponding to the method embodiment, the embodiment of the invention provides an energy regulating device of a unit, wherein the unit comprises a plurality of variable frequency compressors; as shown in fig. 3, the apparatus includes:
the first detection module 31 is used for detecting the air supply temperature of the unit within a preset period time;
the determining module 32 is configured to determine an adjusting action and an adjusting time of the unit according to the air supply temperature and a variation value of the air supply temperature detected in a plurality of preset period times before the preset period time;
the second detection module 33 is configured to detect the number of the multiple variable frequency compressors in the current unit;
and the adjusting module 34 is used for adjusting the operation modes of the plurality of variable frequency compressors in the unit according to the operation number, the adjusting action and the adjusting time.
The invention provides an energy regulating device of a unit, which detects the air supply temperature of the unit within a preset period time; determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time; and adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action, the adjusting time and the detected operation number of the variable frequency compressors. In the method, the adjusting action and the adjusting time of the unit are determined according to the air supply temperature and the temperature change of the unit, and then the operation modes of the multiple variable frequency compressors are adjusted according to the operation number, the adjusting action and the adjusting time of the compressors, so that the operation efficiency of the unit is the highest, the operation efficiency is improved, and the energy is saved.
Further, the determining module is further configured to: comparing the air supply temperature with a first preset threshold value, and determining a target temperature interval where the air supply temperature is located from the first preset interval; wherein the first preset threshold comprises a plurality of different temperature values; the first preset interval comprises a plurality of different temperature intervals; comparing the change value with a second preset threshold value, and determining a target change interval in which the change value is located from the second preset interval; wherein the second preset threshold comprises a plurality of different variation values; the second preset interval comprises a plurality of different change intervals; and determining the adjusting action and the adjusting time from the preset corresponding relation according to the target temperature interval and the target change interval.
Further, the above variation value is determined by: acquiring a first average value of a plurality of air supply temperatures detected in a first preset period time before the preset period time; acquiring a second average value of a plurality of air supply temperatures detected within a second preset period before the preset period; determining a difference value of the first average value and the second average value as a variation value.
Further, the adjusting module is further configured to: if the operation quantity is 1, adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in the optimal operation interval; if the operation number is not 1, adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjustment action and the adjustment time so as to enable each variable frequency compressor in operation to operate in the optimal operation interval; the optimal operation interval of each variable frequency compressor is preset, and the optimal operation interval is that the ratio of the refrigerating capacity to the power meets a target numerical value.
Further, the adjusting action comprises: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; the above-mentioned regulation time includes: a preset cycle time and half of the preset cycle time; the adjusting module is further configured to: if the adjusting time is the preset cycle time, the following operations are executed for each running variable frequency compressor: adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in an optimal running interval; if the adjusting time is half of the preset cycle time, adjusting the number of the running variable frequency compressors according to the adjusting action; for each running inverter compressor after the number is changed, the following operations are executed: and adjusting the frequency of the running inverter compressor according to the adjusting action so as to enable the inverter compressor to run in the optimal running interval.
Further, the adjusting module is further configured to: if the adjusting action is high-speed loading or low-speed loading, a variable frequency compressor is additionally arranged; if the adjustment action is high-speed unloading or low-speed unloading, closing one variable-frequency compressor; if the adjustment action is taken as a hold, the running mode of the variable frequency compressor is kept.
Further, the adjusting action includes: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; the adjusting module is further configured to: if the adjustment action is high-speed loading or high-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a first preset value so that the variable-frequency compressor runs in an optimal running range; if the adjustment action is low-speed loading or low-speed unloading, increasing or decreasing the frequency of the running variable-frequency compressor according to a second preset value so that the variable-frequency compressor runs in an optimal running range; if the adjustment action is used as a holding action, the running mode of the running variable frequency compressor is kept; the first preset value is larger than the second preset value.
Furthermore, the device further comprises a storage module for storing the operation mode of the unit, wherein the operation mode comprises the operation parameters of the running inverter compressor.
The energy regulating device of the unit provided by the embodiment of the invention has the same technical characteristics as the energy regulating method of the unit provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
Referring to fig. 4, an embodiment of the present invention provides an assembly, including: the energy conditioning device 41 of the assembly of the second aspect further comprises a plurality of inverter compressors 42. Wherein, a plurality of variable frequency compressors can be the same or different.
The method and the apparatus for adjusting energy of a unit and the computer program product of the unit provided in the embodiments of the present invention include a computer-readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementations may refer to the method embodiments and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the scope of the disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The energy regulating method of the unit is characterized in that the unit comprises a plurality of variable frequency compressors; the method comprises the following steps:
detecting the air supply temperature of the unit within a preset period time;
determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the variation value of the air supply temperature detected in a plurality of preset period times before the preset period time;
detecting the operation quantity of a plurality of variable frequency compressors in the current unit;
adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the operation number, the adjustment action and the adjustment time;
according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time, determining the adjusting action and the adjusting time of the unit, and the method comprises the following steps:
comparing the air supply temperature with a first preset threshold value, and determining a target temperature interval where the air supply temperature is located from a first preset interval; wherein the first preset threshold comprises a plurality of different temperature values; the first preset interval comprises a plurality of different temperature intervals;
comparing the change value with a second preset threshold value, and determining a target change interval in which the change value is located from the second preset interval; wherein the second preset threshold comprises a plurality of different variation values; the second preset interval comprises a plurality of different change intervals;
determining the adjusting action and the adjusting time from a preset corresponding relation according to the target temperature interval and the target change interval;
the variation value is determined by:
acquiring a first average value of a plurality of air supply temperatures detected in a first preset period before the preset period;
acquiring a second average value of a plurality of air supply temperatures detected within a second preset period time before the preset period time;
determining a difference value of the first average value and the second average value as the variation value;
adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the operation quantity, the adjustment action and the adjustment time, wherein the step comprises the following steps:
if the operation number is 1, adjusting the frequency of the running variable frequency compressor according to the adjusting action so as to enable the variable frequency compressor to run in an optimal operation interval;
if the operation number is not 1, adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action and the adjusting time so that each variable frequency compressor which is in operation operates in an optimal operation interval;
the method comprises the steps that each variable frequency compressor is preset with an optimal operation interval of the variable frequency compressor, and the optimal operation interval is that the ratio of refrigerating capacity to power meets a target value.
2. The method of claim 1, wherein the act of adjusting comprises: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading; the adjusting time comprises: a preset cycle time and half of the preset cycle time;
if the operation number is not 1, adjusting the operation modes of a plurality of variable frequency compressors in the unit based on the adjusting action and the adjusting time so that each variable frequency compressor in operation operates in an optimal operation interval, wherein the step comprises the following steps of:
if the adjusting time is the preset cycle time, executing the following operations aiming at each running variable frequency compressor: adjusting the frequency of the running variable frequency compressor according to the adjusting action so as to enable the variable frequency compressor to run in an optimal running range;
if the adjusting time is half of the preset cycle time, adjusting the number of the running variable frequency compressors according to the adjusting action;
for each running inverter compressor after the number is changed, the following operations are executed: and adjusting the frequency of the running variable-frequency compressor according to the adjusting action so as to enable the variable-frequency compressor to run in an optimal running interval.
3. The method of claim 2, wherein the step of adjusting the number of inverter compressors being operated according to the adjusting action if the adjusting time is half of the preset cycle time comprises:
if the adjusting action is high-speed loading or low-speed loading, a variable frequency compressor is additionally arranged;
if the adjustment action is high-speed unloading or low-speed unloading, closing one variable-frequency compressor;
and if the adjusting action is keeping, keeping the running variable frequency compressor running mode.
4. The method of claim 1 or 2, wherein the adjusting act comprises: high-speed loading, low-speed loading, maintaining, high-speed unloading and low-speed unloading;
according to the adjusting action, adjusting the frequency of the running inverter compressor so as to enable the inverter compressor to run in an optimal running interval, wherein the step comprises the following steps:
if the adjustment action is high-speed loading or high-speed unloading, increasing or decreasing the frequency of the running variable frequency compressor according to a first preset value so as to enable the variable frequency compressor to run in an optimal running range;
if the adjusting action is low-speed loading or low-speed unloading, increasing or reducing the frequency of the running variable-frequency compressor according to a second preset numerical value so as to enable the variable-frequency compressor to run in an optimal running range;
if the adjusting action is keeping, keeping the running mode of the running variable frequency compressor;
wherein the first preset value is greater than the second preset value.
5. The method of claim 1, wherein after the step of adjusting the operating mode of the plurality of inverter compressors in the unit based on the number of operations, the adjusting act, and the adjusting time, the method further comprises: and saving the operation mode of the unit, wherein the operation mode comprises the operation parameters of the running variable frequency compressor.
6. The energy regulating device of the unit is characterized in that the unit comprises a plurality of variable frequency compressors; the device comprises:
the first detection module is used for detecting the air supply temperature of the unit within a preset period time;
the determining module is used for determining the adjusting action and the adjusting time of the unit according to the air supply temperature and the change value of the air supply temperature detected in a plurality of preset period times before the preset period time;
the second detection module is used for detecting the running number of a plurality of variable frequency compressors in the unit at present;
the adjusting module is used for adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the operation quantity, the adjusting action and the adjusting time;
the determination module is further to:
comparing the air supply temperature with a first preset threshold value, and determining a target temperature interval where the air supply temperature is located from a first preset interval; wherein the first preset threshold comprises a plurality of different temperature values; the first preset interval comprises a plurality of different temperature intervals;
comparing the change value with a second preset threshold value, and determining a target change interval where the change value is located from the second preset interval; wherein the second preset threshold comprises a plurality of different variation values; the second preset interval comprises a plurality of different change intervals;
determining the adjusting action and the adjusting time from a preset corresponding relation according to the target temperature interval and the target change interval;
the apparatus further comprises a variance value determination module; the change value determination module is to:
acquiring a first average value of a plurality of air supply temperatures detected in a first preset period time before the preset period time;
acquiring a second average value of a plurality of air supply temperatures detected within a second preset period time before the preset period time;
determining a difference value of the first average value and the second average value as the variation value;
the adjustment module is further configured to:
if the operation number is 1, adjusting the frequency of the running variable frequency compressor according to the adjusting action so as to enable the variable frequency compressor to run in an optimal operation interval;
if the operation number is not 1, adjusting the operation modes of a plurality of variable frequency compressors in the unit according to the adjusting action and the adjusting time so that each variable frequency compressor which is in operation operates in an optimal operation interval;
the method comprises the steps that each variable frequency compressor is preset with an optimal operation interval of the variable frequency compressor, and the optimal operation interval is that the ratio of refrigerating capacity to power meets a target numerical value.
7. An assembly, comprising: the energy conditioning system of claim 6, further comprising a plurality of inverter compressors.
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| CN113959128B (en) * | 2021-09-23 | 2023-06-20 | 青岛海尔空调电子有限公司 | Control method and device for multi-head water chilling unit, refrigeration equipment and medium |
| CN114234400B (en) * | 2021-12-23 | 2023-05-30 | 珠海格力电器股份有限公司 | Multi-module unit control method, device, computer equipment and storage medium |
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| JP4316933B2 (en) * | 2003-06-03 | 2009-08-19 | 東芝キヤリア株式会社 | Air conditioner |
| KR100749058B1 (en) * | 2006-07-20 | 2007-08-13 | 삼성전자주식회사 | Variable capacity air conditioner and method for control operating of variable capacity air conditioner |
| CN101986050B (en) * | 2010-09-09 | 2013-03-06 | 宁波奥克斯电气有限公司 | Method for controlling air-conditioner in variable volume modular unit |
| CN102466301B (en) * | 2010-11-19 | 2013-10-16 | 约克广州空调冷冻设备有限公司 | Method and system for loading and deloading unit module in module unit |
| CN102252399A (en) * | 2011-05-13 | 2011-11-23 | 珠海铨高机电设备有限公司 | Compressor energy regulating and controlling method of modular cold/hot water unit |
| CN102353122B (en) * | 2011-09-26 | 2013-06-19 | Tcl空调器(中山)有限公司 | Modular multi-connection control method and system |
| CN104990211B (en) * | 2015-06-24 | 2017-12-12 | 山东新力拓节能服务工程科技有限公司 | The control method of the centrifugal Central air-conditioning unit of multi-machine heads frequency conversion |
| CN106225363B (en) * | 2016-08-23 | 2019-07-30 | 荏原冷热***（中国）有限公司 | The control method and device of refrigerator cold water outlet temperature |
| CN108626923B (en) * | 2017-03-15 | 2021-10-22 | 约克广州空调冷冻设备有限公司 | Control structure and control method of air conditioning system |
| CN107655244B (en) * | 2017-07-31 | 2021-11-02 | 青岛海尔空调电子有限公司 | Control method of magnetic suspension centrifugal air conditioning unit |
| CN107490151A (en) * | 2017-09-06 | 2017-12-19 | 重庆美的通用制冷设备有限公司 | Water chiller-heater unit, air-conditioning system and its energy control method |
| CN111288697B (en) * | 2020-03-03 | 2021-09-24 | 百尔制冷(无锡)有限公司 | Frequency conversion control method for refrigeration parallel unit |
| CN112303807A (en) * | 2020-10-27 | 2021-02-02 | 广东Tcl智能暖通设备有限公司 | Compressor loading control method, multi-split system and storage medium |
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