CN108224675B - Method and device for reducing power consumption - Google Patents
Method and device for reducing power consumption Download PDFInfo
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- CN108224675B CN108224675B CN201711482838.9A CN201711482838A CN108224675B CN 108224675 B CN108224675 B CN 108224675B CN 201711482838 A CN201711482838 A CN 201711482838A CN 108224675 B CN108224675 B CN 108224675B
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Abstract
The embodiment of the application provides a method and a device for reducing power consumption, and relates to the technical field of energy conservation. The method comprises the steps of collecting the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and the working current of a fan of an air conditioner when the fan runs at different air speeds, then respectively determining the air quantity, the refrigeration capacity and the power, and determining and selecting a rated air speed gear of the fan according to the air quantity, the refrigeration capacity and the power. The method and the device for reducing the power consumption have the advantages of being capable of achieving the purposes of energy conservation and emission reduction and being long in service life.
Description
Technical Field
The present invention relates to the field of energy saving technologies, and in particular, to a method and an apparatus for reducing power consumption.
Background
The precision air conditioner in the machine room is a special air conditioner designed for the machine room of modern electronic equipment, and the working precision and the reliability of the precision air conditioner are much higher than those of a common air conditioner. The machine room precision air conditioner can adjust the temperature and the humidity, and the precision is high.
At present, the technical requirement of precision air conditioner manufacturers is that 80% of wind speed gear of an Embedded Controller (EC) fan can meet the sensible cooling capacity and the wind volume on a nameplate, so that the wind speed of the EC fan at the 80% wind speed gear is generally used as the rated wind speed of the EC fan. However, when the EC fan is operated at the rated wind speed, the sensible heat and the air volume generally reach the desired values, but the power consumption is relatively high, resulting in low energy efficiency of the air conditioner.
Content of application
In view of the above, an object of the present invention is to provide a method for reducing power consumption, so as to solve the problem of large energy consumption when an air conditioner operates at a rated power in the prior art.
Another objective of the present application is to provide a device for reducing power consumption, so as to solve the problem of large energy consumption when the air conditioner operates at rated power in the prior art.
In order to achieve the above purpose, the embodiments of the present application employ the following technical solutions:
in one aspect, an embodiment of the present application provides a method for reducing power consumption, where the method for reducing power consumption includes:
collecting the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and working current when a fan of the air conditioner runs at different air speed gears;
determining the air volume of the fan when the fan operates at different air speed gears based on the air speed of the air outlet;
determining the refrigeration capacity of the fan in different wind speed gears based on the temperature of the air outlet, the temperature of the air inlet and the determined air volume of the fan in different wind speed gears, and determining the power consumption of the fan in different wind speed gears based on the working current;
and selecting a rated wind speed gear for the fan based on the refrigeration capacity, the wind volume and the power consumption when the fan operates at different wind speed gears.
On the other hand, an embodiment of the present application further provides an apparatus for reducing power consumption, where the apparatus for reducing power consumption includes:
the information acquisition unit is used for acquiring the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and working current when a fan of the air conditioner runs at different air speed gears;
the information determining unit is used for determining the air volume of the fan when the fan operates at different air speed gears based on the air speed of the air outlet;
the information determining unit is further configured to determine the refrigeration capacity of the fan when the fan operates at different wind speed gears based on the air outlet temperature, the air inlet temperature and the determined air volume of the fan when the fan operates at different wind speed gears, and determine the power consumption of the fan when the fan operates at different wind speed gears based on the working current;
and the rated wind speed gear selection unit is used for selecting a rated wind speed gear for the fan based on the refrigeration capacity, the air volume and the power consumption when the fan operates at different wind speed gears.
Compared with the prior art, the method has the following beneficial effects:
the application provides a method and a device for reducing power consumption, which are characterized in that the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and the working current of a fan of an air conditioner are collected when the fan runs at different air speeds, then the air quantity, the refrigeration capacity and the power are respectively determined, and the rated air speed gear of the fan is determined and selected according to the air quantity, the refrigeration capacity and the power. The method for reducing the power consumption can determine and select the rated wind speed gear of the fan according to the wind volume, the refrigeration capacity and the power, namely, the wind volume, the refrigeration capacity and the power are linked, so that the power consumption is lower, and the purposes of energy conservation and emission reduction can be achieved. Meanwhile, the rated wind speed gear determined by the refrigeration capacity, the wind quantity and the power is the optimal operation node of the fan, namely the wind speed gear with the highest efficiency is used, so that the air conditioner can operate more reasonably, and the service life of equipment can be prolonged.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a functional block diagram of a server provided in an embodiment of the present application.
Fig. 2 shows a flowchart of a method for reducing power consumption according to an embodiment of the present application.
Fig. 3 shows a block diagram of an apparatus for reducing power consumption according to an embodiment of the present application.
Fig. 4 is a flowchart illustrating another method for reducing power consumption according to an embodiment of the present application.
Fig. 5 shows a flowchart of a sub-step of step S140 in fig. 4 of the present application.
Fig. 6 shows a flowchart of another substep of step S140 of fig. 4 of the present application.
Fig. 7 shows a block diagram of an apparatus for reducing power consumption according to an embodiment of the present application.
Fig. 8 shows a sub-module schematic diagram of a rated wind speed gear selection unit provided by the embodiment of the application.
Icon: 100-a server; 110-a memory; 120-a memory controller; 130-a processor; 140-peripheral interfaces; 150-a radio frequency unit; 160-a display unit; 170-input-output unit; 200-means to reduce power consumption; 210-an information acquisition unit; 220-an information determination unit; 230-rated wind speed gear selection unit; 231-difference calculation module; 232-wind speed gear determination module; 233-wind speed gear selection module; 234-ratio calculation module; and 240-wind speed gear adjusting unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
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, it need not be further defined and explained in subsequent figures. Also, in the description of the present application, it is to be noted that, unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; 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 application can be understood in a specific case by those of ordinary skill in the art. Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The method and apparatus for reducing power consumption according to an embodiment of the present application can be applied to the server 100 shown in fig. 1. As shown in fig. 1, the server 100 includes a memory 110, a storage controller 120, a processor 130, a peripheral interface 140, a radio frequency unit 150, a display unit 160, and an input/output unit 170. In this embodiment, the server 100 may be, but is not limited to, a Personal Computer (PC), a tablet computer, and the like.
The memory 110, the memory controller 120, the processor 130, the peripheral interface 140, the rf unit 150, the display unit 160, and the input/output unit 170 are electrically connected to each other directly or indirectly, so as to implement data transmission or interaction. These components may typically be connected to each other by one or more communication buses or signal lines, for example. In this embodiment, the apparatus 200 for reducing power consumption includes at least one software functional module which can be stored in the memory 110 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the server 100. The processor 130 is used for executing executable modules stored in the memory 110, for example, software functional modules and computer programs included in the apparatus 200 for reducing power consumption. In this embodiment, the operating system of the server 100 is preferably a Windows system.
The Memory 110 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 110 may be used to store software programs and modules, and the processor 130 is used to execute the programs upon receiving execution instructions. Access to the second memory 110 by the processor 130 and possibly other components may be under the control of the memory controller 120.
The processor 130 may be an integrated circuit chip having signal processing capabilities. The processor 130 may be a general-purpose processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
The peripheral interface 140 couples various input/output devices (e.g., radio frequency unit 150, display unit 160, input/output unit 170) to the processor 130 and to the memory 110. In some embodiments, peripheral interface 140, processor 130, and memory controller 120 may be implemented in a single chip. In other examples, they may be implemented separately from separate chips.
The rf unit 150 is configured to receive and transmit radio wave signals, and perform interconversion between radio waves and electrical signals, thereby performing wireless communication between the server 100 and a network or other communication devices.
The display unit 160 is used to provide an interactive interface (e.g., a user operation interface) or to display image data. In this embodiment, the display unit 160 may be a liquid crystal display or a touch display, which may be a capacitive touch screen or a resistive touch screen supporting single-point and multi-point touch operations. Supporting single-point and multi-point touch operations means that the touch display can sense touch operations generated from one or more locations on the touch display, and the sensed touch operations are sent to the processor 130 for calculation and processing.
The input/output unit 170 is used for providing input data to the user to realize the interaction of the user with the server 100. In the present embodiment, the input/output unit 170 may be, but is not limited to, a mouse, a keyboard, and the like.
It will be appreciated that the configuration shown in fig. 1 is merely illustrative and that the server 100 may include more or fewer components than shown in fig. 1 or may have a different configuration than shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
First embodiment
Referring to fig. 2, a flowchart of a method for reducing power consumption according to an embodiment of the present application is shown. In this embodiment, since the technical requirement of the precision air conditioner manufacturer is that an 80% wind speed gear of an Embedded Controller (EC) fan meets the sensible cooling capacity and the air volume on a nameplate, that is, the 80% wind speed gear of the EC fan is used as a rated wind speed gear of the fan, although the rated wind speed gear given by the manufacturer can meet the expected values of the sensible cooling capacity and the air volume, the energy consumption of the EC fan is high at the same time. Therefore, in order to achieve the purpose of energy conservation and emission reduction, the fan needs to be debugged again to select a new rated wind speed gear of the fan.
It should be further noted that the method for reducing power consumption according to the embodiment of the present invention is not limited by the specific sequence shown in fig. 2 and described below, and it should be understood that, in other embodiments, the sequence of some steps in the method for reducing power consumption according to the present invention may be interchanged according to actual needs, or some steps may be omitted or deleted. The specific process shown in fig. 2 will be described in detail below.
And S110, acquiring the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and the working current when a fan of the air conditioner runs at different air speed gears.
In this embodiment, to achieve the purpose of selecting the rated wind speed of the fan through the wind volume, the sensible cooling capacity and the power, the wind volume needs to be calculated first, so related parameters need to be obtained first.
It should be noted that the temperature sensor can acquire the temperature of the air inlet and the temperature of the air outlet of the air conditioner, the air speed sensor can acquire the air speed of the air outlet of the air conditioner, the current detection circuit can acquire current information during the operation of the air conditioner, and the temperature sensor, the air speed sensor and the current detection circuit can transmit the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet and the working current to the server 100, so that the server 100 can acquire relevant data.
It should be noted that, because the wind speed at each position may be different at the air outlet of the air conditioner, if only the wind speed at a single position on the air outlet is collected, the data may be inaccurate. In view of this, in this embodiment, a plurality of wind speed sensors are disposed on the air outlet, and each wind speed sensor is located at a different position of the air outlet, and the server 100 can obtain wind speeds transmitted by the wind speed sensors located at different positions of the air outlet, and use an average value of the collected wind speeds as a wind speed of the air outlet, thereby achieving a purpose of more accurate measurement.
The following is illustrated by way of specific embodiments:
the test is carried out by using a machine room without service, the area of the machine room is 155 square meters, 52 machine cabinets are designed, cold channels are closed, 3 precision air conditioners with refrigerating capacity of 130.3KW and air volume of 29000 cubic meters per hour are designed into an N +1 mode. The technical requirement of precision air-conditioning manufacturers is that the cooling capacity and the air quantity on the nameplate can be met by operating the EC fan at the air speed of 80%. And starting the two precision air conditioners to operate, opening 52 ventilation floors, and measuring the wind speed of the EC fan at 60% wind speed, 70% wind speed, 80% wind speed, 90% wind speed and 100% wind speed respectively. And (3-4 points are adopted by one cold channel) a carton box with the height of 60mmX60mm about 1 m is placed on the ventilation floor, and 9 points are adopted at the position of the air outlet of the carton box to measure the wind speed and record the wind speed. And simultaneously recording the fan current, the temperature of the air inlet and the temperature of the air outlet when each wind speed gear operates. And running for more than 1 hour after the wind speed gear of the fan is converted every time, and then testing.
Of course, in some other embodiments, it is also possible to perform the collection of the related data by some other embodiments, and this embodiment does not limit this.
And step S120, determining the air volume of the fan when the fan runs at different air speed gears based on the air speed of the air outlet.
After acquiring the relevant data, the server 100 first calculates the air volume according to the formula L ═ V × a × T, where L denotes the air volume, V denotes the air speed of the outlet, a denotes the area of the outlet, the operator can set the area of the outlet in the server 100 in advance, and T denotes the time, for example, when measuring the air volume for one hour, T ═ 3600S.
Step S130, determining the refrigeration capacity of the fan when the fan operates at different wind speed gears based on the air outlet temperature, the air inlet temperature and the determined air volume of the fan when the fan operates at different wind speed gears, and determining the power consumption of the fan when the fan operates at different wind speed gears based on the working current.
After the air output is calculated, the sensible cooling capacity can be calculated according to the formula QS (formula QS is Cp multiplied by L multiplied by (T1-T2); wherein QS represents sensible heat, Cp represents specific heat of air, ρ represents air density, L represents air volume, T1 represents air inlet temperature, and T2 represents air outlet temperature. In this example, ρ is a constant value of 1.2kg/m3, and Cp is a constant value of 1kJ/kg ℃.
Meanwhile, according to the formula P √ 3UI, where P denotes power consumption, v 3 denotes root 3, which is 1.731, U denotes an operating voltage, and I denotes an operating current.
Through the above formula, the air quantity, the refrigeration capacity and the power consumption of the fan can be respectively calculated when the fan runs at different wind speed gears.
And step S140, selecting a rated wind speed gear for the fan based on the refrigeration capacity, the air volume and the power consumption when the fan runs at different wind speed gears.
After the refrigeration capacity, the air volume and the power consumption of the fan during operation at different wind speed gears are determined, the server 100 may select a wind speed gear with lower power consumption as a rated wind speed gear according to the refrigeration capacity, the air volume and the power consumption.
It should be noted that, compared with the rated wind speed gear given by the manufacturer, since the new rated wind speed gear determined by the method for reducing the sweet spot power provided by the embodiment of the present invention is the optimal operation node of the fan, the rated wind speed gear determined by using the sensible heat quantity, the wind quantity and the power can be the optimal operation node of the fan, when the fan operates between the optimal operation node and the lowest operation wind speed gear preset by the fan, the power consumption of the fan can be reduced, and the effects of energy saving and emission reduction are achieved.
Second embodiment
Referring to fig. 3, an embodiment of the present application provides an apparatus 200 for reducing power consumption. It should be noted that the basic principle and the technical effects of the apparatus 200 for reducing power consumption according to the embodiment of the present application are the same as those of the first embodiment, and for a brief description, reference may be made to the corresponding contents in the first embodiment for the parts not mentioned in the embodiment.
The apparatus 200 for reducing power consumption includes:
the information acquisition unit 210 is configured to acquire the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet, and the working current when the fan of the air conditioner operates at different air speed levels.
It is understood that step S110 may be performed by the information collecting unit 210.
And an information determining unit 220, configured to determine, based on the wind speed of the air outlet, an air volume of the fan when the fan operates at different wind speed gears.
It is understood that step S120 may be performed by the information determining unit 220.
The information determining unit 220 is further configured to determine, based on the air outlet temperature, the air inlet temperature, and the determined air volume when the fan operates at different wind speed gears, a sensible heat capacity when the fan operates at different wind speed gears, and determine, based on the working current, a power consumption when the fan operates at different wind speed gears.
It is understood that step S130 may be performed by the information determining unit 220.
And a rated wind speed gear selecting unit 230 configured to select a rated wind speed gear for the fan based on the sensible heat amount, the wind amount, and the power consumption when the fan operates at different wind speed gears.
It is understood that step S140 may be performed by the rated wind speed gear selection unit 230.
Third embodiment
Fig. 4 is a flowchart of a method for reducing power consumption according to an embodiment of the present application. In this embodiment, since the technical requirement of the precision air conditioner manufacturer is that an 80% wind speed gear of an Embedded Controller (EC) fan meets the sensible cooling capacity and the air volume on a nameplate, that is, the 80% wind speed gear of the EC fan is used as a rated wind speed gear of the fan, although the rated wind speed gear given by the manufacturer can meet the expected values of the sensible cooling capacity and the air volume, the energy consumption of the EC fan is high at the same time. Therefore, in order to achieve the purpose of energy conservation and emission reduction, the fan needs to be debugged again to select a new rated wind speed gear of the fan.
It should be further noted that the method for reducing power consumption according to the embodiment of the present invention is not limited by the specific sequence shown in fig. 4 and described below, and it should be understood that, in other embodiments, the sequence of some steps in the method for reducing power consumption according to the present invention may be interchanged according to actual needs, or some steps may be omitted or deleted. The specific process shown in fig. 2 will be described in detail below.
And S110, acquiring the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and the working current when a fan of the air conditioner runs at different air speed gears.
In this embodiment, to achieve the purpose of selecting the rated wind speed of the fan through the wind volume, the sensible cooling capacity and the power, the wind volume needs to be calculated first, so related parameters need to be obtained first.
It should be noted that the temperature sensor can acquire the temperature of the air inlet and the temperature of the air outlet of the air conditioner, the air speed sensor can acquire the air speed of the air outlet of the air conditioner, the current detection circuit can acquire current information during the operation of the air conditioner, and the temperature sensor, the air speed sensor and the current detection circuit can transmit the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet and the working current to the server 100, so that the server 100 can acquire relevant data.
It should be noted that, because the wind speed at each position may be different at the air outlet of the air conditioner, if only the wind speed at a single position on the air outlet is collected, the data may be inaccurate. In view of this, in this embodiment, a plurality of wind speed sensors are disposed on the air outlet, and each wind speed sensor is located at a different position of the air outlet, and the server 100 can obtain wind speeds transmitted by the wind speed sensors located at different positions of the air outlet, and use an average value of the collected wind speeds as a wind speed of the air outlet, thereby achieving a purpose of more accurate measurement.
The following is illustrated by way of specific embodiments:
the test is carried out by using a machine room without service, the area of the machine room is 155 square meters, 52 machine cabinets are designed, cold channels are closed, 3 precision air conditioners with refrigerating capacity of 130.3KW and air volume of 29000 cubic meters per hour are designed into an N +1 mode. The technical requirement of precision air-conditioning manufacturers is that the cooling capacity and the air quantity on the nameplate can be met by operating the EC fan at the air speed of 80%. And starting the two precision air conditioners to operate, opening 52 ventilation floors, and measuring the wind speed of the EC fan at 60% wind speed, 70% wind speed, 80% wind speed, 90% wind speed and 100% wind speed respectively. And (3-4 points are adopted by one cold channel) a carton box with the height of 60mmX60mm about 1 m is placed on the ventilation floor, and 9 points are adopted at the position of the air outlet of the carton box to measure the wind speed and record the wind speed. And simultaneously recording the fan current, the temperature of the air inlet and the temperature of the air outlet when each wind speed gear operates. And running for more than 1 hour after the wind speed gear of the fan is converted every time, and then testing.
Of course, in some other embodiments, it is also possible to perform the collection of the related data by some other embodiments, and this embodiment does not limit this.
And step S120, determining the air volume of the fan when the fan runs at different air speed gears based on the air speed of the air outlet.
After acquiring the relevant data, the server 100 first calculates the air volume according to the formula L ═ V × a × T, where L denotes the air volume, V denotes the air speed of the outlet, a denotes the area of the outlet, the operator can set the area of the outlet in the server 100 in advance, and T denotes the time, for example, when measuring the air volume for one hour, T ═ 3600S.
Step S130, determining the refrigeration capacity of the fan when the fan operates at different wind speed gears based on the air outlet temperature, the air inlet temperature and the determined air volume of the fan when the fan operates at different wind speed gears, and determining the power consumption of the fan when the fan operates at different wind speed gears based on the working current.
After the air output is calculated, the sensible cooling capacity can be calculated according to the formula QS (formula QS is Cp multiplied by L multiplied by (T1-T2); wherein QS represents sensible heat, Cp represents specific heat of air, ρ represents air density, L represents air volume, T1 represents air inlet temperature, and T2 represents air outlet temperature. In this example, ρ is a constant value of 1.2kg/m3, and Cp is a constant value of 1kJ/kg ℃.
Meanwhile, according to the formula P √ 3UI, where P denotes power consumption, v 3 denotes root 3, which is 1.731, U denotes an operating voltage, and I denotes an operating current.
Through the above formula, the air quantity, the refrigeration capacity and the power consumption of the fan can be respectively calculated when the fan runs at different wind speed gears.
And step S140, selecting a rated wind speed gear for the fan based on the refrigeration capacity, the air volume and the power consumption when the fan runs at different wind speed gears.
After the refrigeration capacity, the air volume and the power consumption of the fan during operation at different wind speed gears are determined, the server 100 may select a wind speed gear with lower power consumption as a rated wind speed gear according to the refrigeration capacity, the air volume and the power consumption.
Referring to fig. 5, as an implementation manner of the present embodiment, step S140 includes:
and a substep S141 of calculating a first difference value between the refrigeration capacity and preset refrigeration capacity when the fan is operated at different wind speed gears and a second difference value between the air quantity and preset air quantity in sequence.
In this embodiment, the rated sensible cooling capacity provided by the manufacturer is used as the preset sensible cooling capacity, and meanwhile, the rated air quantity provided by the manufacturer is used as the preset air quantity, and a difference value is made between the sensible cooling capacity when the fan operates at different wind speed gears and the preset sensible cooling capacity to obtain a first difference value, when the difference value is greater than 0, the sensible cooling capacity of the air conditioner can meet the rated sensible cooling capacity, and when the difference value is less than 0, the sensible cooling capacity of the air conditioner cannot meet the rated sensible cooling capacity. Similarly, the difference between the air volume and the rated air volume can be adjusted.
Substep S142, determining at least one wind speed gear based on the first difference and a first preset difference and the second difference and a second preset difference.
However, in practical application, even if the actual sensible cooling capacity and/or the air volume of the air conditioner is smaller than the rated sensible cooling capacity and/or the air volume, the actual requirement can be met within a certain range. That is, as long as the first difference is greater than a first preset difference and the second difference is greater than a second preset difference, the actual requirement can be met, and at this time, the server 100 can determine all the wind speed gears meeting the actual requirement. It should be noted that the first preset difference and the second preset difference are both values set by the worker according to actual requirements, and the first preset difference and the second preset value are both negative numbers. For example, the first preset difference value is-30 KW, which indicates that even if the refrigeration capacity at the current wind speed is lower than the rated refrigeration capacity, the actual demand can be satisfied as long as the value of the refrigeration capacity at the current wind speed lower than the rated refrigeration capacity is within 30 KW.
And a substep S143 of selecting a wind speed stage with the lowest power consumption from the at least one wind speed stage as a rated wind speed stage.
After all the wind speed gears capable of meeting the actual requirements are determined, the server 100 selects the wind speed gear with the lowest power consumption from all the wind speed gears as the rated wind speed gear of the fan, and the fan generally works at the rated wind speed gear when the air conditioner is in operation, so that the effects of energy conservation and emission reduction are achieved. Meanwhile, the rated wind speed gear determined by the refrigeration capacity, the wind quantity and the power is the optimal operation node of the fan, namely the wind speed gear with the highest efficiency is used, so that the air conditioner can operate more reasonably, and the service life of equipment can be prolonged.
Referring to fig. 6, as a second implementation manner of the present embodiment, step S140 includes:
and a substep S144 of calculating a first ratio of the refrigeration capacity to preset refrigeration capacity and a second ratio of the air capacity to preset air capacity when the fan runs at different wind speed gears in sequence.
Substep S145, determining at least one wind speed gear based on said first ratio and a first preset ratio and said second ratio and a second preset ratio.
And a substep S146 of selecting a wind speed stage with the lowest power consumption from the at least one wind speed stage as the rated wind speed stage.
Since the implementation between substeps S144-substep S146 and substeps 141-substep S143 provided in this implementation is substantially the same, it is not described herein again.
The following is illustrated by way of specific embodiments:
as shown in Table 1, the rated air volume (i.e., the required air volume) was 58000m3The rated refrigeration capacity is 260.6KW, in order to meet the requirements that the actual measurement refrigeration capacity is larger than the rated refrigeration capacity and the actual air quantity is larger than the rated air quantity, a manufacturer selects a gear which is 80% of the maximum running air speed of the fan as the rated air quantityAnd in the wind gear, the power consumption per hour is 4.5 KW. Compared with the mode that the gear of 80% of the maximum operating wind speed of the fan is used as the rated wind speed gear, when the gear of 70% of the maximum operating wind speed of the fan is selected as the rated wind speed gear, the sensible heat quantity is reduced by 4.4%, the wind quantity is reduced by 4.6%, and when the power consumption of the fan is reduced by 33%, the method for reducing the power consumption can select the gear of 70% of the maximum operating wind speed of the fan as the rated wind speed gear, so that the effects of energy conservation and emission reduction are achieved.
And S150, acquiring the temperature of an air inlet when the fan operates currently.
In the actual operation process, because the air conditioner temperature actually set by the user is different, the air conditioner needs to be controlled to adjust the wind speed gear. Since the external environment temperature and the temperature of the air conditioner actually set by the user need to be compared when the air conditioner is controlled to adjust the air speed gear, in this embodiment, the purpose of the external environment temperature of the fireball is achieved by obtaining the temperature of the air inlet when the fan is currently running.
And step S160, adjusting the wind speed gear of the fan according to the temperature of the air inlet, the temperature set by the user and the rated wind speed gear.
After acquiring the temperature of the air inlet when the fan is currently running, the server 100 may adjust the wind speed level of the fan according to the temperature of the air inlet, the temperature set by the user, and the rated wind speed level.
Specifically, step S160 includes:
and a substep S161 of comparing the current temperature of the air inlet with the temperature set by the user.
And a substep S162 of controlling the fan to increase the speed if the temperature of the current air inlet is higher than the temperature set by the user, wherein the wind speed of the fan after increasing the speed is less than or equal to the wind speed of the rated wind speed gear.
In this embodiment, the temperature of the current air inlet indicates the current external environment temperature, and when the external environment temperature is greater than the temperature set by the user, the fan needs to be controlled to increase the speed, so that the air volume and the refrigerating capacity are increased, the temperature of the external environment is reduced, and the purpose of matching the temperature set by the user is finally achieved.
However, the wind speed of the fan after the speed increase should be less than or equal to the wind speed of the rated wind speed gear, and generally the fan operates at the wind speed corresponding to the rated wind speed gear. When the air conditioner is operated at the rated wind speed, and the temperature of the air inlet is still higher than the temperature set by the user, the server 100 will turn on the standby air conditioner.
And a substep S163, if the temperature of the current air inlet is less than the temperature set by the user, controlling the fan to reduce the speed, wherein the wind speed of the fan after speed reduction is greater than or equal to the preset lowest wind speed.
And a substep S164, if the temperature of the current air inlet is equal to the temperature set by the user, controlling the fan to operate according to the current air speed gear.
Fourth embodiment
Referring to fig. 7, an embodiment of the present application provides an apparatus 200 for reducing power consumption. It should be noted that the basic principle and the technical effects of the apparatus 200 for reducing power consumption according to the embodiment of the present application are the same as those of the first embodiment, and for a brief description, reference may be made to the corresponding contents in the first embodiment for the parts not mentioned in the embodiment.
The apparatus 200 for reducing power consumption includes:
the information acquisition unit 210 is configured to acquire the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet, and the working current when the fan of the air conditioner operates at different air speed levels.
It is understood that step S110 may be performed by the information collecting unit 210.
And an information determining unit 220, configured to determine, based on the wind speed of the air outlet, an air volume of the fan when the fan operates at different wind speed gears.
It is understood that step S120 may be performed by the information determining unit 220.
The information determining unit 220 is further configured to determine, based on the air outlet temperature, the air inlet temperature, and the determined air volume when the fan operates at different wind speed gears, a sensible heat capacity when the fan operates at different wind speed gears, and determine, based on the working current, a power consumption when the fan operates at different wind speed gears.
It is understood that step S130 may be performed by the information determining unit 220.
And a rated wind speed gear selecting unit 230 configured to select a rated wind speed gear for the fan based on the sensible heat amount, the wind amount, and the power consumption when the fan operates at different wind speed gears.
It is understood that step S140 may be performed by the rated wind speed gear selection unit 230.
Specifically, referring to fig. 8, the rated wind speed gear selecting unit 230 includes:
and the difference value calculating module 231 is configured to calculate a first difference value between the refrigeration capacity and a preset refrigeration capacity when the fan is operated at different wind speed gears, and a second difference value between the air volume and a preset air volume in sequence.
It is understood that the substep S141 may be performed by the difference calculation module 231.
A wind speed gear determining module 232, configured to determine at least one wind speed gear based on the first difference and the first preset difference, and the second difference and the second preset difference.
It will be appreciated that substep S142 may be performed by the gear determination module 232.
And the wind speed gear selection module 233 is configured to select a wind speed gear with the lowest power consumption from the at least one wind speed gear as the rated wind speed gear.
It is to be understood that substep S143 may be performed by the wind speed profile selection module 233.
The ratio calculation module 234 is configured to sequentially calculate a first ratio between the refrigeration capacity and a preset refrigeration capacity when the fan is operated at different wind speed gears, and a second ratio between the air volume and a preset air volume.
It will be appreciated that substep S144 may be performed by the ratio calculation module 234.
The wind speed gear determining module 232 is further configured to determine at least one wind speed gear based on the first ratio and the first preset ratio and the second preset ratio.
It will be appreciated that substep S145 may be performed by the wind gear determination module 232.
The wind speed gear selection module 233 is further configured to select a wind speed gear with the lowest power consumption from the at least one wind speed gear as the rated wind speed gear.
It is to be appreciated that substep S146 may be performed by wind speed profile selection module 233.
The information acquisition unit 210 is further configured to acquire a temperature of an air inlet when the fan is currently running.
It is understood that step S150 may be performed by the information collecting unit 210.
And the wind speed gear adjusting unit 240 is configured to adjust a wind speed gear of the fan according to the temperature of the air inlet, the temperature set by the user, and the rated wind speed gear.
It is understood that step S160 may be performed by the wind speed gear adjusting unit 240.
Specifically, the wind speed gear adjusting unit 240 includes:
and the comparison module is used for comparing the current temperature of the air inlet with the temperature set by the user.
It will be appreciated that sub-step S161 may be performed by the comparison module.
And the wind speed gear adjusting module is used for controlling the fan to increase the speed if the temperature of the current air inlet is greater than the temperature set by the user, and the wind speed of the fan after increasing the speed is less than or equal to the wind speed of the rated wind speed gear.
It is understood that substep S162 may be performed by the wind speed gear adjustment module.
And the wind speed gear adjusting module is further used for controlling the fan to reduce the speed if the temperature of the current air inlet is less than the temperature set by the user, and the wind speed of the fan after speed reduction is greater than or equal to the preset minimum wind speed.
It will be appreciated that substep S163 may be performed by the wind speed gear adjustment module.
And the wind speed gear adjusting module is also used for controlling the fan to operate according to the current wind speed gear if the current temperature of the air inlet is equal to the temperature set by the user.
It will be appreciated that substep S164 may be performed by the wind speed profile adjustment module.
Fifth embodiment
A third embodiment of the present application provides a non-volatile computer storage medium, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions can execute the method for reducing power consumption in any of the above method embodiments.
In summary, the present application provides a method and an apparatus for reducing power consumption, which collect the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet and the working current of the air conditioner fan when the fan is operated at different air speeds, then respectively determine the air volume, the refrigeration capacity and the power, and determine and select the rated air speed gear of the fan according to the air volume, the refrigeration capacity and the power. The method for reducing the power consumption can determine and select the rated wind speed gear of the fan according to the wind volume, the refrigeration capacity and the power, namely, the wind volume, the refrigeration capacity and the power are linked, so that the power consumption is lower, and the purposes of energy conservation and emission reduction can be achieved. Meanwhile, the rated wind speed gear determined by the refrigeration capacity, the wind quantity and the power is the optimal operation node of the fan, namely the wind speed gear with the highest efficiency is used, so that the air conditioner can operate more reasonably, and the service life of equipment can be prolonged.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. 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, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A method of reducing power consumption, the method comprising:
collecting the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and working current when a fan of the air conditioner runs at different air speed gears;
determining the air volume of the fan when the fan operates at different air speed gears based on the air speed of the air outlet;
determining the refrigeration capacity of the fan in different wind speed gears based on the temperature of the air outlet, the temperature of the air inlet and the determined air volume of the fan in different wind speed gears, and determining the power consumption of the fan in different wind speed gears based on the working current;
and selecting a rated wind speed gear for the fan based on the cold displaying amount and preset cold displaying amount when the fan operates at different wind speed gears, the wind amount and preset wind amount when the fan operates at different wind speed gears and the power consumption.
2. The method for reducing consumed power according to claim 1, wherein the step of selecting a rated wind speed gear for the fan based on the sensible heat and the preset sensible heat when the fan operates at different wind speed gears, the air volume and the preset air volume when the fan operates at different wind speed gears, and the consumed power comprises:
sequentially calculating a first difference value between the cold displaying amount and preset cold displaying amount when the fan runs at different wind speed gears and a second difference value between the air quantity and preset air quantity;
determining at least one wind speed gear based on the first difference and a first preset difference and the second difference and a second preset difference;
and selecting the wind speed gear with the lowest power consumption from the at least one wind speed gear as the rated wind speed gear.
3. The method for reducing consumed power according to claim 1, wherein the step of selecting a rated wind speed gear for the fan based on the sensible heat and the preset sensible heat when the fan operates at different wind speed gears, the air volume and the preset air volume when the fan operates at different wind speed gears, and the consumed power comprises:
sequentially calculating a first ratio of the refrigeration capacity to preset refrigeration capacity when the fan runs at different wind speed gears and a second ratio of the air quantity to preset air quantity;
determining at least one wind speed gear based on the first ratio and a first preset ratio and the second ratio and a second preset ratio;
and selecting the wind speed gear with the lowest power consumption from the at least one wind speed gear as the rated wind speed gear.
4. The method for reducing consumed power according to claim 1, wherein after the step of selecting a rated wind speed range for the wind turbine based on the sensible heat amount and the preset sensible heat amount when the wind turbine operates at different wind speed ranges, the air volume and the preset air volume when the wind turbine operates at different wind speed ranges, and the consumed power, the method for reducing consumed power further comprises:
acquiring the temperature of an air inlet when the fan operates currently;
and adjusting the wind speed grade of the fan according to the temperature of the air inlet, the temperature set by a user and the rated wind speed grade.
5. The method for reducing power consumption according to claim 4, wherein the step of adjusting the wind speed profile of the wind turbine according to the temperature of the air inlet, the temperature set by the user and the rated wind speed profile comprises:
comparing the current temperature of the air inlet with the temperature set by the user;
and if the temperature of the current air inlet is higher than the temperature set by the user, controlling the fan to increase the speed, wherein the wind speed of the fan after increasing the speed is lower than or equal to the wind speed of the rated wind speed gear.
6. The method for reducing power consumption according to claim 1, wherein the collecting the temperature of the air outlet, the temperature of the air inlet, the air speed of the air outlet and the working current of the fan of the air conditioner during operation at different wind speed gears comprises:
collecting wind speeds transmitted by sensors respectively positioned at different directions of the air outlet;
and determining the average value of the collected wind speeds as the wind speed of the air outlet.
7. The method for reducing power consumption according to claim 1, wherein the determining the sensible heat capacity of the fan when the fan operates at different wind speed gears based on the outlet temperature, the inlet temperature and the determined air volume of the fan when the fan operates at different wind speed gears comprises:
calculating the sensible heat according to formula QS (Cp × ρ × L × (T1-T2); wherein QS represents sensible heat, Cp represents specific heat of air, ρ represents air density, L represents air volume, T1 represents air inlet temperature, and T2 represents air outlet temperature.
8. An apparatus for reducing power consumption, the apparatus comprising:
the information acquisition unit is used for acquiring the temperature of an air outlet, the temperature of an air inlet, the air speed of the air outlet and working current when a fan of the air conditioner runs at different air speed gears;
the information determining unit is used for determining the air volume of the fan when the fan operates at different air speed gears based on the air speed of the air outlet;
the information determining unit is further configured to determine the refrigeration capacity of the fan when the fan operates at different wind speed gears based on the air outlet temperature, the air inlet temperature and the determined air volume of the fan when the fan operates at different wind speed gears, and determine the power consumption of the fan when the fan operates at different wind speed gears based on the working current;
and the rated wind speed gear selection unit is used for selecting a rated wind speed gear for the fan based on the refrigeration capacity and preset refrigeration capacity when the fan operates at different wind speed gears, the air volume and preset air volume when the fan operates at different wind speed gears and the power consumption power.
9. The apparatus for reducing power consumption according to claim 8, wherein the rated wind speed gear selecting unit comprises:
the difference value calculation module is used for sequentially calculating a first difference value between the cold displaying amount and preset cold displaying amount when the fan runs at different wind speed gears and a second difference value between the air quantity and preset air quantity;
the wind speed gear determining module is used for determining at least one wind speed gear based on the first difference and a first preset difference and the second difference and a second preset difference;
and the wind speed gear selection module is used for selecting a wind speed gear with the lowest power consumption from the at least one wind speed gear as a rated wind speed gear.
10. The apparatus for reducing power consumption according to claim 9, wherein the rated wind speed gear selecting unit further comprises:
the ratio calculation module is used for calculating a first ratio of the refrigeration capacity to preset refrigeration capacity when the fan runs at different wind speed gears and a second ratio of the air quantity to preset air quantity in sequence;
the wind speed gear determining module is used for determining at least one wind speed gear based on the first ratio and a first preset ratio and the second ratio and a second preset ratio;
and the wind speed gear selection module is used for selecting a wind speed gear with the lowest power consumption from the at least one wind speed gear as a rated wind speed gear.
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| CN109489215B (en) * | 2018-11-13 | 2020-11-13 | 珠海格力电器股份有限公司 | Wind speed self-adaptive control method, control device and combined air conditioning unit |
| CN111271835B (en) * | 2019-06-28 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Power-based motor speed-up and rotating speed automatic control method and air conditioner |
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