CN114383270A - Control method of centralized air supply system and centralized air supply system - Google Patents
Control method of centralized air supply system and centralized air supply system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000009826 distribution Methods 0.000 claims abstract description 108
- 230000003584 silencer Effects 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 11
- 238000012163 sequencing technique Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 7
- 238000012937 correction Methods 0.000 description 6
- 238000004422 calculation algorithm Methods 0.000 description 4
- 238000009827 uniform distribution Methods 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
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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
Abstract
The invention provides a control method of a centralized air supply system and the centralized air supply system, the method is applied to a centralized air supply host of the centralized air supply system, and comprises the following steps: when a resident presses a control button switch, acquiring a switch opening electric signal sent by a flow distribution valve, and determining a target air volume and at least one resident with an air supply demand; determining the pipeline impedance of a branch pipeline where a target household is located when the target air volume is reached, and determining the maximum pipeline impedance as target air supply power; determining the opening angle corresponding to the flow distribution valve of the branch pipeline of each household based on the difference between the pipeline impedance of the branch pipeline of each household and the target air supply power; and determining the operation frequency of the centralized air supply host machine based on the total amount table of the target air supply power and the target air volume so that the centralized air supply host machine operates at the operation frequency. The invention can uniformly distribute air quantity, reduce energy consumption and cost and simultaneously improve the experience of residents.
Description
Technical Field
The invention relates to the technical field of fresh air systems, in particular to a control method of a centralized air supply system and the centralized air supply system.
Background
In the current centralized fresh air system design process, pipeline design is based on the design of the full-open working condition, and the fresh air host is always in the operating frequency under the full-open working condition, so that the energy consumption is high, the householder needs to pay higher cost, the air distribution uniformity is poor, the autonomous regulation and control of the householder are difficult to meet, and the experience of the householder is poor.
Disclosure of Invention
In view of the above, the present invention provides a control method for a centralized air supply system and a centralized air supply system, which can uniformly distribute air volume, reduce energy consumption and cost, and improve household experience.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a method for controlling a centralized air supply system, where the method is applied to a centralized air supply host of the centralized air supply system, and includes: when a resident presses a control button switch, acquiring a switch opening electric signal sent by a flow distribution valve, and determining a target air volume and at least one resident with an air supply demand; determining the pipeline impedance of a branch pipeline where a target household is located when the target air volume is reached, and determining the maximum pipeline impedance as target air supply power; the target householder is determined based on the distance between the householder and the centralized air supply host; determining the opening angle corresponding to the flow distribution valve of the branch pipeline of each household based on the difference between the pipeline impedance of the branch pipeline of each household and the target air supply power; and determining the operation frequency of the centralized air supply host machine based on the total amount table of the target air supply power and the target air volume so that the centralized air supply host machine operates at the operation frequency.
In one embodiment, determining a duct impedance of a branch duct in which a target household is located when a target air volume is reached, and determining a maximum duct impedance as a target blowing power, comprises: sorting the residents based on the distance between the residents and the centralized air supply host; based on the sequencing result, sequentially selecting a preset number of residents as target residents from the resident farthest from the centralized air supply host; and determining the pipeline impedance of the branch pipeline where the target household is located when the target air volume is reached, and determining the maximum pipeline impedance as the target air supply power.
In one embodiment, determining the opening angle corresponding to the flow distribution valve of the branch pipeline of each household based on the difference value between the pipeline impedance of the branch pipeline of each household and the target air supply power comprises: determining the pipeline impedance of the branch pipeline where each household is located, and determining the difference value between the pipeline impedance of the branch pipeline where each household is located and the target air supply power; determining the resistance coefficient of the flow distribution valve of the branch pipeline where each resident is located based on the difference value and the local resistance formula; and determining the corresponding opening angle of each flow distribution valve when the target air volume is reached through table look-up based on the resistance coefficient.
In one embodiment, determining an operating frequency of the central blower host based on a look-up table of total target blower power and target air volume to operate the central blower host at the operating frequency comprises: determining the number of households based on the number of received switch opening electrical signals; multiplying the number of residents by the target air volume to obtain the total amount of the target air volume; determining the total amount of the target air supply power and the target air volume as the working point of the centralized air supply main machine; and determining the operating frequency corresponding to the operating point based on the predetermined power performance curve when the concentrated air supply main machine operates at each frequency, so that the concentrated air supply main machine operates at the operating frequency.
In one embodiment, the method further comprises: and sending the opening angle to the corresponding flow distribution valve so that the flow distribution valve performs corresponding angle adjustment based on the opening angle.
In a second aspect, an embodiment of the present invention provides a centralized air supply system, including: the centralized air supply main machine, the silencer and the main pipeline are connected in sequence; the system also comprises a plurality of branch pipelines connected with the main pipeline and flow distribution valves connected on the branch pipelines; the centralized air supply host is used for providing power for the centralized air supply system; the silencer is used for eliminating the noise of the centralized air supply host; and the flow distribution valve is used for adjusting the air supply amount of the branch pipeline.
In one embodiment, the central air supply system further comprises an air supply well, and the air supply well is connected with the central air supply main machine.
In one embodiment, the terminal of the branch duct is provided with an air outlet, and the air outlet is a louver air outlet.
In one embodiment, the central air supply system further comprises a control button switch, which is disposed in the chamber and connected to the flow distribution valve.
In one embodiment, the flow distribution valve is connected with a centralized air supply host, and the centralized air supply host further comprises a host module and a control module; the control module is used for sending the opening angle of each flow distribution valve corresponding to the target air volume to the host module; and the host module is used for sending the opening angle to the corresponding flow distribution valve so as to enable the flow distribution valve to carry out corresponding angle adjustment based on the opening angle.
In one embodiment, the control module is further configured to send an operating frequency of the central air supply host corresponding to the total amount of the target air volume to the host module, so that the central air supply host operates at the operating frequency.
The embodiment of the invention has the following beneficial effects:
the control method of the centralized air supply system and the centralized air supply system are applied to a centralized air supply host of the centralized air supply system, and firstly, when a resident presses a control button switch, a switch opening electric signal sent by a flow distribution valve is acquired, and a target air volume and at least one resident with an air supply demand are determined; then determining the pipeline impedance of a branch pipeline where a target household (determined based on the distance between the household and the centralized air supply host) is located when the target air volume is reached, and determining the maximum pipeline impedance as target air supply power; then, determining the opening angle corresponding to the flow distribution valve of the branch pipeline of each household based on the difference between the pipeline impedance of the branch pipeline of each household and the target air supply power; and finally, determining the operation frequency of the centralized air supply host machine based on the total amount table of the target air supply power and the target air volume so as to enable the centralized air supply host machine to operate at the operation frequency.
According to the method, the air supply power of the centralized air supply main machine can be determined according to the pipeline impedance of the branch pipeline where the resident with the air supply requirement is located when the target air volume is reached, and the opening angle of the flow distribution valve is controlled, so that the uniform distribution of the air volume is realized; meanwhile, according to the method, the household can control the flow distribution valve through the control button switch, whether the centralized air supply system is used or not is selected according to needs, the operation frequency of the centralized air supply system under the full-open working condition is not needed, energy consumption is reduced, cost is reduced, and household experience is improved.
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 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 a control method of a centralized air supply system according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another method for controlling a centralized air supply system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a centralized air supply system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another centralized air supply system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a centralized air supply host according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a centralized air supply system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon:
1-blast well; 2-centralized air supply host; 3-a silencer; 4-a main pipeline; 5-a flow distribution valve; 6-branch pipelines; 7-air outlet; 21-air inlet end; 22-air outlet end; 23-a host module; 24-control module.
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, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the current centralized new trend system design process, pipeline design all is based on the operating frequency under the operating mode of opening entirely, and the new trend host computer is in the operating frequency under the operating mode of opening entirely always, and this kind of mode leads to the power consumption big, and the resident family needs higher expense of paying, and the host computer lacks intelligent distribution adjustment ability simultaneously, and the amount of wind distribution homogeneity is poor, is difficult to satisfy the resident family and independently regulates and control, and the resident experience feels poor.
Based on the above, the control method of the centralized air supply system and the centralized air supply system provided by the embodiment of the invention can uniformly distribute the air volume, reduce the energy consumption and the cost, and simultaneously improve the experience of residents.
To facilitate understanding of the present embodiment, first, a detailed description is given to a control method of a centralized air supply system disclosed in the present embodiment, which is applied to a centralized air supply host of the centralized air supply system, and referring to a flowchart of the control method of the centralized air supply system shown in fig. 1, it is shown that the method mainly includes the following steps S101 to S104:
step S101: when a resident presses a control button switch, a switch opening electric signal sent by the flow distribution valve is obtained, and the target air volume and at least one resident with air supply requirements are determined.
In one embodiment, a control button switch is provided in the household room, and the household can control the opening and closing of the flow distribution valve through the control button switch, so as to select whether to use the centralized air supply system or not according to the requirement. The flow distribution valve of each branch pipeline in the centralized air supply system is connected with the centralized air supply host, and the flow distribution valve and the centralized air supply host are communicated in real time in a wired or wireless communication mode.
When a resident presses a control button switch, the flow distribution valve obtains a switch opening electric signal, and is electrified to start self-correction, and the opening angle of the flow distribution valve at the current moment is determined; meanwhile, the flow distribution valve sends a switch opening signal to the centralized air supply host, the centralized air supply host starts to operate at an initial frequency after receiving the switch opening signal, and the initial frequency can be determined according to the performance of the centralized air supply host.
Further, the concentrated air supply host can accurately judge specific residents with air supply requirements according to switch-on electric signals sent by the flow distribution valves, and determine target air volume uniformly distributed to all the residents with air supply requirements.
Step S102: and determining the pipeline impedance of the branch pipeline where the target household is located when the target air volume is reached, and determining the maximum pipeline impedance as the target air supply power.
Wherein the target household is determined based on a distance between the household and the central blower host. In order to overcome the wind resistance requirement of the farthest path, in the embodiment of the invention, one or more households with the air supply requirement, which are farthest away from the main machine, can be selected as target households according to the distance between the households and the centralized air supply main machine, the pipeline impedance of a branch pipeline where each target household is located when the branch pipeline reaches the target air volume is calculated through an embedded algorithm of a control module of the centralized air supply main machine, and the maximum pipeline impedance is selected as the target air supply power of the centralized air supply main machine, so that each household can reach the target air volume.
Step S103: and determining the opening angle corresponding to the flow distribution valve of the branch pipeline where each household is located based on the difference between the pipeline impedance of the branch pipeline where each household is located and the target air supply power.
In specific application, the resistance difference value of each branch pipeline can be calculated through logic operation in the centralized air supply host according to the calculated pipeline resistance of the branch pipeline where each resident is located and the determined target air supply power of the centralized air supply host, the resistance coefficient of the flow distribution valve is determined according to the resistance difference value, and the opening angle of the flow distribution valve is determined according to the resistance coefficient of the flow distribution valve.
Step S104: and determining the operation frequency of the centralized air supply host machine based on the total amount table of the target air supply power and the target air volume so that the centralized air supply host machine operates at the operation frequency.
In the embodiment of the invention, the operation frequency corresponding to the total amount of target air supply power and target air volume can be determined in a table look-up mode, the initial frequency of the concentrated air supply host is adjusted to the operation frequency, and the concentrated air supply host operates at the operation frequency, so that each branch pipeline can reach the target air supply volume, the air volume is uniformly distributed, and the household experience is improved; the concentrated air supply host does not need to be always in the operating frequency under the full-open working condition, so that the energy consumption is reduced, and the cost is reduced.
According to the control method of the centralized air supply system provided by the embodiment of the invention, the air supply power of the centralized air supply host can be determined according to the pipeline impedance of the branch pipeline where the resident with the air supply requirement is located when the branch pipeline reaches the target air volume, and the opening angle of the flow distribution valve is controlled, so that the uniform distribution of the air volume is realized; meanwhile, according to the method, the household can control the flow distribution valve through the control button switch, whether the centralized air supply system is used or not is selected according to needs, the operation frequency of the centralized air supply system under the full-open working condition is not needed, energy consumption is reduced, cost is reduced, and household experience is improved.
In one embodiment, for the aforementioned step S102, that is, when determining the duct impedance of the branch duct where the target household is located when the target air volume is reached, and determining the maximum duct impedance as the target blowing power, the following methods can be adopted, including but not limited to:
first, the residents are sorted based on the distance between the residents and the centralized air supply host.
And then, based on the sequencing result, sequentially selecting a preset number of residents as target residents from the resident farthest from the centralized air supply host.
And finally, determining the pipeline impedance of the branch pipeline where the target household is located when the target air volume is reached, and determining the maximum pipeline impedance as the target air supply power.
Specifically, in the embodiment of the invention, all residents C with specific air supply requirements can be comparedi(i is more than or equal to 0 and less than or equal to n, n is the number of all households with air supply requirements), and identifying the household C with air supply requirements of two households farthest from the centralized air supply main machinenAnd Cn-1As the target household, the two identified households are not necessarily in the same branch line path. Pipeline impedance P of branch pipelines with air supply requirements when the branch pipelines reach target air quantity Q through embedded algorithm of control module of centralized air supply hostiWherein P isi＝PLocal part+PAlong the way，PiIs the line impedance of the ith household, PLocal partThe impedances of the air outlet, the flow distribution valve and the silencer in the branch pipeline can be specifically factory set values; pAlong the wayThe impedance of the branch pipeline and the main pipeline can be an actual working condition value, or can be calculated according to the distance between the branch pipeline and the main pipeline, PAlong the wayIs as oneThe bit branch pipe impedance + unit main pipe impedance. Further, the calculation result P is compared and judgediTake the maximum value MAX (P)n，Pn-1) Target blowing power P as central blowing main machine0。
In one embodiment, for the aforementioned step S103, that is, when determining the opening angle corresponding to the flow distribution valve of the branch duct of each household based on the difference between the duct impedance of the branch duct of each household and the target blowing power, the following methods can be adopted, including but not limited to:
first, the duct impedance of the branch duct in which each household is located is determined, and the difference between the duct impedance of the branch duct in which each household is located and the target blowing power is determined.
In particular, it can be according to formula Pi＝PLocal part+PAlong the wayDetermining the pipeline impedance of the branch pipeline of each household, and then calculating the difference value delta P between the pipeline impedance of the branch pipeline of each household and the target air supply poweri＝P0-Pi。
Then, the resistance coefficient of the flow distribution valve of the branch pipeline where each household is located is determined based on the difference value and the local resistance formula.
In a specific application, the formula Δ P may be calculated according to the local resistancei＝ξρv2And/2 (wherein, rho is air density, and v is relative movement speed of the object and the air) calculates a resistance coefficient xi of the flow distribution valve.
And finally, determining the corresponding opening angle of each flow distribution valve when the target air volume is reached through table lookup based on the resistance coefficient.
In specific application, the resistance coefficient-angle curve (i.e. ξ - θ curve) of the flow distributing valves is preset in the centralized air supply host, and the opening angle θ of each flow distributing valve which is to be opened when reaching the target air volume Q can be determined in a table look-up manner in the embodimenti。
Further, the method provided by the embodiment of the present invention further includes: sending the opening angle to the corresponding flow distribution valve so that the flow distribution valve performs corresponding operation based on the opening angleAnd (6) angle adjustment. Specifically, the centralized air supply main machine can calculate the opening angle theta of each flow distribution valveiAnd sending the data to corresponding flow distribution valves, wherein the flow distribution valves can adjust corresponding angles according to the calculated opening angles, and the condition of realizing balanced air volume is achieved.
In one embodiment, for the aforementioned step S104, that is, when determining the operation frequency of the central blower host based on the total amount lookup table of the target blower power and the target air volume so that the central blower host operates at the operation frequency, the following manners can be adopted, including but not limited to:
first, the number of residents is determined based on the number of received switch-on electrical signals.
Specifically, the centralized air supply host machine can determine the number of residents who turn on the centralized air supply system, namely the number n of all residents with air supply requirements, namely the total startup number n of the system according to the switch turn-on electric signal fed back by the flow distribution valve.
And secondly, multiplying the number of the residents by the target air volume to obtain the total amount of the target air volume.
Specifically, the total exhaust air volume of the centralized air supply system, namely the total amount Q of the target air volume, is calculated according to the total startup number n of the system0＝n*Q。
Then, the total amount of the target air supply power and the target air volume is determined as the working point of the concentrated air supply main machine.
Specifically, the maximum value MAX (P) of the pipeline impedance when the branch pipeline reaches the target air volume is takenn，Pn-1) Target blowing power P as central blowing main machine0Will (P)0，Q0) The working point of the main machine of the centralized air supply is the power demand point of the system.
And finally, determining the operating frequency corresponding to the operating point based on the predetermined power performance curve of the concentrated air supply main machine when the concentrated air supply main machine operates at each frequency, so that the concentrated air supply main machine operates at the operating frequency.
In specific application, the power performance curve of the concentrated air supply main machine when the concentrated air supply main machine operates at each frequency is predetermined, so that the air supply power and the total row required by the concentrated air supply main machine are determinedThe air quantity, namely after the working point of the central air supply host is determined, the actual running frequency R of the central air supply host can be determined by matching the working point according to the power performance curve when the central air supply host runs at each frequency in a table look-up mode0And adjusting the running frequency of the centralized air supply main machine from the initial frequency to R0Make the central air supply main machine operate at the running frequency R0And (5) operating.
The control method of the centralized air supply system provided by the embodiment of the invention comprises the steps of firstly determining the wind resistance of the farthest maximum branch pipeline (namely, the maximum pipeline impedance), and adjusting the total power value of the centralized air supply host (namely, the target air supply power); then after the air volume of the centralized air supply host is adjusted, calculating a pressure difference value of each branch pipeline (namely a difference value between the pipeline impedance of a branch pipeline where each household is located and the target air supply power), determining the opening angle of each flow distribution valve, and performing angle adjustment, wherein the opening angle of the existing flow distribution valve is large and needs to be adjusted to be small, and the adjustment of the branch pipeline flow distribution valves is completed to balance the air volume of each branch pipeline; and finally, determining the operation frequency of the concentrated air supply host machine when the concentrated air supply host machine provides the target air supply power and the total air exhaust amount through table lookup. According to the air quantity balance control method for firstly adjusting the power of the main machine and then adjusting the flow of the branch pipeline, the centralized air supply main machine can intelligently adjust the frequency, and the flow distribution valves can carry out angle self-correction, so that the uniform distribution of the air quantity is realized, the energy is saved, the cost is reduced, and the user experience is improved.
For easy understanding, the embodiment of the present invention further provides another control method for a centralized air supply system, and referring to fig. 2, it is shown that the method mainly includes the following steps S201 to S209:
step S201: the fresh air switch in the house is turned on.
Namely, the resident presses the indoor control button switch to start the centralized air supply system.
Step S202: the flow distribution valve is electrified to complete self-correction, and meanwhile, an electric signal is transmitted to the host.
Specifically, when a resident presses a control button switch, the flow distribution valve obtains a switch opening electric signal, and is electrified to start self-correction, and the opening angle of the flow distribution valve at the current moment is determined; meanwhile, the flow distribution valve sends a switch opening signal to the centralized air supply host.
Step S203: the host computer receives the electrical signal and operates at an initial frequency.
Specifically, the central air supply host starts to operate at an initial frequency after receiving a switch opening signal.
Step S204: the host machine accurately judges the specific household C for starting up according to the feedback signal of the flow distribution valvei。
Specifically, the centralized air supply host can accurately judge the specific household C with air supply demand according to the switch-on electric signal sent by the flow distribution valveiThe particular household C being started immediatelyi。
Step S205: the host machine detects, compares and identifies two households C farthest from the host machinenAnd Cn-1Calculating the pipeline impedance P of each starting main pipeline when the target air quantity Q is reached through a host embedded logic algorithmiThe maximum value MAX (P) is obtained by comparison and judgmentn，Pn-1) As system power P0。
Specifically, the centralized air supply main machine compares all the residents C with specific air supply requirementsiIdentifying the resident C with the air supply requirement of the two households farthest from the centralized air supply main machinenAnd Cn-1As the target household, the two identified households are not necessarily in the same branch line path. Pipeline impedance P of branch pipelines with air supply requirements when the branch pipelines reach target air quantity Q through logic algorithm embedded in control module of centralized air supply hostiAnd further, comparing and judging the above-mentioned calculation result PiTake the maximum value MAX (P)n，Pn-1) Target blowing power P as central blowing main machine0I.e. system power P0。
Step S206: calculating the pipeline impedance P of each branch pipelineiAnd system power P0The resistance coefficient of each flow distribution valve is calculated according to the resistance difference, and the angle theta of each flow distribution valve which is opened when the target air quantity Q is reached is determined according to the resistance coefficient-angle curve of the flow distribution valvei。
Specifically, the difference Δ P between the pipeline impedance of the branch pipeline (i.e. each branch pipeline for starting up) where each household is located and the target air supply power is calculatedi＝P0-Pi(ii) a Then, the formula Δ P is calculated from the local resistancei＝ξρv22, calculating a resistance coefficient xi of the flow distribution valve; finally, a resistance coefficient-angle curve (namely a xi-theta curve) of the flow distribution valves is preset in the centralized air supply host, and the opening angle theta of each flow distribution valve which is to be opened when the target air quantity Q is reached can be determined in a table look-up modei。
Step S207: the host machine counts the total startup number n according to the feedback signal of the flow distribution valve, and determines the total exhaust air quantity Q according to the total startup number0。
Specifically, the central air supply host can determine the number of residents opening the central air supply system, namely the total startup number n of the system, according to the switch opening electric signal fed back by the flow distribution valve, and calculate the total exhaust air volume of the central air supply system, namely the total amount Q of the target air volume according to the total startup number n of the system0＝n*Q。
Step S208: the total exhaust air quantity Q0And system power P0As the required operating point R of the host0(P0，Q0)。
Step S209: matching the working point R according to the power performance curve of the main engine during running at each frequency0And determining the host operating frequency.
Specifically, the actual operation frequency R of the centralized air supply main machine can be determined by matching the working points according to the power performance curve when the centralized air supply main machine operates at each frequency in a table look-up mode0And adjusting the running frequency of the centralized air supply main machine from the initial frequency to R0Make the central air supply main machine operate at the running frequency R0And (5) operating.
The mode has two-stage control, the first stage is a control button switch in a household room, and the control button switch can control the flow distribution valve to be opened and closed, so that a centralized air supply household can select the flow distribution valve as required, the cost is reduced, and the household experience is improved; the second level is a centralized air supply host which can match with air volume power according to system working conditions and control the opening angle of a flow distribution valve, so that the balanced distribution of air volume is realized, the operating frequency under the full-open working condition is not needed, and the energy consumption is reduced.
As to the control method of the centralized air supply system, an embodiment of the present invention further provides a centralized air supply system, which is shown in fig. 3 and schematically includes: the centralized air supply main machine 2, the silencer 3 and the main pipeline 4 are connected in sequence; the centralized air supply system also comprises a plurality of branch pipelines 6 connected with the main pipeline 4 and flow distribution valves 5 connected on the branch pipelines 6; the centralized air supply host 2 is used for providing power for a centralized air supply system; the silencer 3 is used for eliminating the noise of the centralized air supply main machine 2; and a flow distribution valve 5 for adjusting the air supply amount of the branch duct 6.
When a resident presses a control button switch of the system, the flow distribution valve 5 of the branch pipeline 6 receives a control button switch turn-on electric signal, the flow distribution valve 5 of the branch pipeline 6 is electrified to start self-correction, the switch turn-on signal is sent to the centralized air supply host 2, the centralized air supply host 2 starts to operate at an initial frequency after receiving the switch turn-on electric signal, and meanwhile, the silencer 3 starts to operate to eliminate noise of the centralized air supply host 2.
The centralized air supply system provided by the embodiment of the invention comprises: the centralized air supply main machine, the silencer and the main pipeline are connected in sequence; the centralized air supply system also comprises a plurality of branch pipelines connected with the main pipeline and flow distribution valves connected on the branch pipelines; the centralized air supply host is used for providing power for the centralized air supply system; the silencer is used for eliminating the noise of the centralized air supply host; and the flow distribution valve is used for adjusting the air supply amount of the branch pipeline. The noise that the concentrated air supply host computer produced can be eliminated through the muffler among the above-mentioned system, avoids the noise to pass into indoor through the trunk line, promotes resident's experience and feels.
Referring to a schematic structural diagram of another centralized air supply system shown in fig. 4, on the basis of fig. 3, the centralized air supply system further includes: the air supply well 1 is connected with the centralized air supply host machine 2, the terminal of the branch pipeline 6 is provided with an air outlet 7, and the air outlet 7 is a louver air port.
Referring to the structural schematic diagram of the concentrated air supply host shown in fig. 5, the concentrated air supply host 2 includes an air inlet end 21 and an air outlet end 22, the air inlet end 21 is connected with the air supply shaft 1, and the air outlet end 22 is connected with the silencer 3.
Further, the flow distribution valve 5 is connected with the centralized air supply host 2, and specifically, the flow distribution valve 5 is in real-time communication connection with the centralized air supply host 2 through a wired or wireless communication mode. The flow distribution valve 5 is used for sending the received switch opening electric signal to the centralized air supply host machine 2 after a resident presses a control button switch; and the centralized air supply host machine 2 is used for receiving the switch opening electric signal and starting operation after receiving the switch opening electric signal.
With continued reference to fig. 5, the central blower 2 further includes a host module 23 and a control module 24; the control module 24 is configured to send the opening angle of each flow distributing valve 5 corresponding to the target air volume to the host module 23; and the host module 23 is configured to send the opening angle to the corresponding flow distributing valve 5, so that the flow distributing valve 5 performs corresponding angle adjustment based on the opening angle.
In one embodiment, the control module 24 is further configured to send the operation frequency of the central blower host 2 corresponding to the total amount of the target air volume to the host module 23, so that the central blower host 2 operates at the operation frequency.
Furthermore, the centralized air supply system also comprises a control button switch which is arranged indoors and is connected with the flow distribution valve. The control button switch can control the opening and closing of the flow distribution valve, and a resident can select whether to use the centralized air supply system or not according to needs.
In a specific application, a resident can select whether to use the centralized air supply system or not according to needs through an indoor control button switch. When a resident presses a control button switch, the flow distribution valve is electrified to finish self-correction after receiving a switch opening electric signal, and the received switch opening electric signal is sent to the centralized air supply host; the centralized air supply host starts to operate at an initial frequency after receiving the switch-on electric signal, and simultaneously sends a starting signal to the silencer, so that the silencer starts to operate.
The centralized air supply host machine can determine residents with air supply requirements according to electric signals fed back by the flow distribution valves, and sends the opening angle of the flow distribution valve of the branch pipeline where each resident is located when the flow distribution valve reaches the target air volume to the corresponding flow distribution valve, so that the opening angle of the flow distribution valve is adjusted, for example, when the angle of the existing flow distribution valve is larger than the opening angle, the angle of the flow distribution valve is reduced, and the air volume of each branch pipeline is balanced.
In addition, the control module of the centralized air supply host can also send the running power required by the centralized air supply host for conveying all target air volume to the host module, so that the centralized air supply host runs at the running frequency, and the wind resistance requirement of the farthest path is overcome.
Referring to fig. 6, a specific structural diagram of a centralized air supply system is shown, which illustrates that the system includes: the central air supply system comprises an air supply well 1, a central air supply host 2, a silencer 3, a main pipeline 4, a flow distribution valve 5, branch pipelines 6 and air outlets 7, wherein each air outlet corresponds to one resident, as shown in C in figure 61～CnAs shown.
The concentrated air supply main machine 2 provides power for the system, the silencer 3 eliminates the noise of the concentrated air supply main machine 2, the noise is prevented from being transmitted into a room through the main pipeline 4, and the flow distribution valves 5 of the branch pipelines 6 control the flow of each branch pipeline 6 and are used for adjusting the air supply quantity of each household; the air outlet 7 is a louver air outlet.
In the mode, the noise generated by the concentrated air supply host can be eliminated through the silencer in the concentrated air supply system, the noise is prevented from being transmitted into a room through the main pipeline, and the experience of residents is improved; in addition, the system can determine the air supply power of the centralized air supply host according to the pipeline impedance of the branch pipeline of the resident with the air supply requirement when the branch pipeline reaches the target air volume, and controls the opening angle of the flow distribution valve, thereby realizing the uniform distribution of the air volume; meanwhile, in the system, a resident can control the flow distribution valve through the control button switch and select whether to use the centralized air supply system or not according to needs, the centralized air supply system does not need to be in the operating frequency under the full-open working condition, the energy consumption is reduced, the cost is reduced, and the resident experience is improved.
The system provided by the embodiment of the present invention has the same implementation principle and technical effect as the foregoing method embodiment, and for the sake of brief description, no mention is made in the system embodiment, and reference may be made to the corresponding contents in the foregoing method embodiment.
It should be noted that all the embodiments mentioned in the embodiments of the present invention are merely exemplary, and may be different from the embodiments in practical applications, and are not limited herein.
The embodiment of the invention also provides electronic equipment, which specifically comprises a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the method of any of the above embodiments.
Fig. 7 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present invention, where the electronic device 100 includes: a processor 70, a memory 71, a bus 72 and a communication interface 73, wherein the processor 70, the communication interface 73 and the memory 71 are connected through the bus 72; the processor 70 is arranged to execute executable modules, such as computer programs, stored in the memory 71.
The Memory 71 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 73 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
The bus 72 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 7, but this does not indicate only one bus or one type of bus.
The memory 71 is configured to store a program, and the processor 70 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 70, or implemented by the processor 70.
The processor 70 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 70. The Processor 70 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 71, and the processor 70 reads the information in the memory 71 and completes the steps of the method in combination with the hardware thereof.
The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the foregoing method embodiment, which is not described herein again.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. 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 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, 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: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present 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 (11)
1. A control method of a centralized air supply system is characterized in that the method is applied to a centralized air supply main machine of the centralized air supply system and comprises the following steps:
when a resident presses a control button switch, acquiring a switch opening electric signal sent by a flow distribution valve, and determining a target air volume and at least one resident with an air supply demand;
determining the pipeline impedance of a branch pipeline where a target household is located when the target air volume is reached, and determining the maximum pipeline impedance as target air supply power; wherein the target household is determined based on a distance between the household and the central blower host;
determining an opening angle corresponding to a flow distribution valve of each branch pipeline where the resident is located based on a difference value between the pipeline impedance of the branch pipeline where the resident is located and the target air supply power;
and determining the operation frequency of the concentrated air supply host machine based on the total amount lookup table of the target air supply power and the target air volume so as to enable the concentrated air supply host machine to operate at the operation frequency.
2. The control method of claim 1, wherein determining a duct impedance of a branch duct in which the target household is located when the target air volume is reached, and determining a maximum duct impedance as the target blowing power comprises:
sequencing the residents based on the distance between the residents and the centralized air supply host;
based on the sequencing result, sequentially selecting a preset number of residents as target residents from the resident farthest from the centralized air supply host;
and determining the pipeline impedance of the branch pipeline where the target household is located when the target air volume is reached, and determining the maximum pipeline impedance as the target air supply power.
3. The control method according to claim 1, wherein the determining the opening angle corresponding to the flow distribution valve of the branch duct where each household is located based on the difference between the pipeline impedance of the branch duct where each household is located and the target air supply power includes:
determining the pipeline impedance of the branch pipeline where each household is located, and determining the difference value between the pipeline impedance of the branch pipeline where each household is located and the target air supply power;
determining the resistance coefficient of the flow distribution valve of the branch pipeline where each household is located based on the difference value and the local resistance formula;
and determining the corresponding opening angle of each flow distribution valve when the target air volume is reached through table look-up based on the resistance coefficient.
4. The control method of claim 1, wherein determining an operating frequency of the central blower host based on a total amount lookup table of the target blower power and the target air volume so that the central blower host operates at the operating frequency comprises:
determining the number of the households based on the number of the received switch opening electric signals;
multiplying the number of the residents by the target air volume to obtain the total amount of the target air volume;
determining the total amount of the target air supply power and the target air volume as the working point of the centralized air supply main machine;
and determining the operating frequency corresponding to the working point based on a predetermined power performance curve when the concentrated air supply main machine operates at each frequency, so that the concentrated air supply main machine operates at the operating frequency.
5. The control method according to claim 3, characterized in that the method further comprises:
and sending the opening angle to a corresponding flow distribution valve so that the flow distribution valve performs corresponding angle adjustment based on the opening angle.
6. A centralized air delivery system, comprising: the centralized air supply main machine, the silencer and the main pipeline are connected in sequence; the flow distribution valve is connected with the branch pipelines;
the centralized air supply host is used for providing power for the centralized air supply system;
the silencer is used for eliminating the noise of the centralized air supply host;
and the flow distribution valve is used for adjusting the air supply amount of the branch pipeline.
7. The centralized air supply system of claim 6, further comprising an air supply shaft, wherein the air supply shaft is connected with the centralized air supply main machine.
8. The centralized air supply system of claim 6, wherein the branch ducts are provided with air outlets at the terminal ends, and the air outlets are louver openings.
9. The centralized air supply system of claim 6, further comprising a control button switch disposed indoors and connected to the flow distribution valve.
10. The centralized air supply system of claim 6, wherein the flow distribution valve is connected to the centralized air supply host, and the centralized air supply host further comprises a host module and a control module;
the control module is used for sending the opening angle of each flow distribution valve corresponding to the target air volume to the host module;
and the host module is used for sending the opening angle to the corresponding flow distribution valve so as to enable the flow distribution valve to carry out corresponding angle adjustment based on the opening angle.
11. The centralized air supply system of claim 10, wherein the control module is further configured to send an operating frequency of the centralized air supply host corresponding to a total amount of a target air volume to the host module, so that the centralized air supply host operates at the operating frequency.
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