CN111520790A - Central range hood, controller and control method - Google Patents
Central range hood, controller and control method Download PDFInfo
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- CN111520790A CN111520790A CN202010570918.5A CN202010570918A CN111520790A CN 111520790 A CN111520790 A CN 111520790A CN 202010570918 A CN202010570918 A CN 202010570918A CN 111520790 A CN111520790 A CN 111520790A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
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- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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Abstract
The invention provides a central range hood, a controller and a control method, and relates to the technical field of central range hoods, wherein the controller is respectively connected with a plurality of fans connected in parallel and power distribution valves positioned on each floor; the control method of the controller comprises the following steps: determining the exhaust air volume required by the fan according to the quantity information, the floor information, the valve opening information and the specification information of the public flue of the power distribution valves in the opening state; determining the working point information of the fan according to the air exhaust amount; determining the running state information of the fan according to the working point information, the maximum frequency of the fan and a wind pressure-wind volume relation curve of the fan, wherein the running state information comprises the starting number and the running frequency of the fan; the invention has low noise and small vibration amplitude, and can meet the requirements of residential design.
Description
Technical Field
The invention relates to the technical field of central range hoods, in particular to a central range hood, a controller and a control method.
Background
When the central range hood is installed in the super high-rise building to assist in smoke exhaust, the requirement for exhaust air volume during the peak cooking period is high due to the height of the building. However, the existing central range hood is provided with a fan, and the requirement of exhausting air in peak periods is difficult to meet. If the large-specification fan with larger air draft is replaced, the power consumption is increased, the noise is large, the vibration amplitude is large, and the requirements of the residential building on the noise and the vibration are not met.
Disclosure of Invention
The invention aims to provide a central range hood, a controller and a control method, which have low system noise and small vibration amplitude and can meet the requirements of residential design.
In a first aspect, the method provided by the invention is applied to a controller, and the controller is respectively connected with a fan and power distribution valves positioned on each floor; the number of the fans is at least two; the method comprises the following steps:
acquiring current working condition information, wherein the working condition information comprises the quantity information of the power distribution valves in an opening state;
determining running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
and controlling the fan to execute the running state information.
In an alternative embodiment, the fan is mounted in a common flue; the working condition information also comprises floor information and valve opening information of the power distribution valve in an opening state, and specification information of the public flue; determining the running state information of the fan according to the current working condition information, comprising the following steps:
determining the air exhaust amount according to the current working condition information;
determining the working point information of the fan according to the air exhaust amount; the working point information comprises an air volume value and an air pressure value when the fan works at a working point;
and determining the running state information of the fan according to the working point information and the wind pressure-wind volume relation curve of the fan.
In an optional embodiment, determining the operating state information of the fan according to the operating point information and a wind pressure-wind volume relationship curve of the fan includes:
determining a wind pressure value P when the fans are operated in parallel when N is 1, 2 and 3 … according to the wind volume value when the fans are operated at the operating point, the maximum frequency of the fans and the following formula (1)1、P2、P3…；
In formula (1), N is the number of fans, and N is 1, 2, 3 …; pNThe wind pressure value mu of the N fans in parallel operationNThe working efficiency of N fans in parallel operation is shown, Q is the air volume value of the fan when a single fan operates, and R is the frequency of the fan when the single fan operates;
according to the working point information and the wind pressure value P1、P2、P3…, and determining the number information of the starting fans according to the position of the predetermined wind pressure-wind volume relation curve; and determining a relation curve of the wind pressure and the wind volume according to the maximum frequency of the fan and the formula (1).
In an optional embodiment, the operation state information further includes frequency information of a starting-up fan, and the method further includes:
and determining the frequency information of the starting-up fan according to the quantity information and the working point information of the starting-up fan and the formula (1).
In an alternative embodiment, the method further comprises:
comparing the accumulated running time of each starting-up fan with a preset time threshold;
and when the accumulated running time of at least one startup fan reaches a preset time threshold and the relevant fans are detected, closing the startup fans of which the running time reaches the preset time threshold and starting a corresponding number of shutdown fans.
In an alternative embodiment, when all fans are turned on, it is detected whether there is a fan that needs to be shut down, and if so, the fan with the accumulated time reaching the preset time threshold is turned off.
In a second aspect, the controller of the central range hood provided by the embodiment of the present invention is connected to the fan and the power distribution valves located on each floor respectively; the number of the fans is at least two; the controller includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring current working condition information, and the working condition information comprises the quantity information of power distribution valves in an opening state;
the determining module is used for determining the running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
and the operation module is used for controlling the fan to execute the operation state information.
In a third aspect, the central range hood provided in the embodiment of the present invention includes at least two fans, a power distribution valve located on each floor, a range hood located in a kitchen on each floor, and the controller described in the second aspect; the power distribution valve is connected with the range hood on the corresponding floor.
In an optional embodiment, the central range hood further comprises a static pressure box, a plurality of reducer pipes and a plurality of control air valves, wherein the number of the reducer pipes is matched with that of the fans; the fan, the reducer pipe and the control air valve are sequentially connected; the control air valve is connected with the static pressure box, and the static pressure box is connected with a common flue.
In a fourth aspect, an electronic device provided by an embodiment of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method according to any one of the foregoing embodiments when executing the computer program.
In a fifth aspect, an embodiment of the present invention provides a computer-readable medium having non-volatile program code executable by a processor, where the program code causes the processor to execute the method described in any one of the foregoing embodiments.
The central range hood, the controller and the control method provided by the invention have the advantages that the current working condition information is obtained, wherein the working condition information comprises the quantity information of the power distribution valves in the opening state; determining running state information of the fans according to the working condition information, wherein the running state information comprises the number information of the started fans; thereby operating the fans with corresponding quantity according to the operation state information; the invention operates the fans with corresponding quantity according to the working condition information, thus under the condition of meeting the requirement of high air exhaust quantity of the super high-rise building, a plurality of fans with smaller specification (smaller air exhaust quantity) can be adopted to operate in parallel, and the fans with smaller specification have lower noise and vibration amplitude, therefore, the invention has low noise and vibration amplitude and can meet the requirement of residential design.
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 central extractor hood control method according to an embodiment of the present invention;
FIG. 2 is a graph showing a relationship between wind pressure and wind volume according to an embodiment of the present invention;
fig. 3 is another flowchart of the central extractor hood control method according to the embodiment of the present invention;
FIG. 4 is a system diagram of a controller provided in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a central range hood according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a central range hood system according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of direction A in FIG. 5 according to an embodiment of the present invention;
fig. 8 is a system schematic diagram of an electronic device according to an embodiment of the present invention.
Icon: 41-an acquisition module; 42-a determination module; 43-running the module; 51-a fan; 52-a reducer pipe; 53-control air valve; 54-static pressure box; 55-a power distribution valve; 56-smoke exhaust ventilator; 57-common flue; 58-a controller; 400-an electronic device; 401 — a communication interface; 402-a processor; 403-a memory; 404-bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
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.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are 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.
At present, super high-rise buildings are more and more common in our lives, and when the central range hood is applied to the super high-rise buildings, the requirement of the exhaust air volume cannot be met due to the fact that the requirement of the exhaust air volume is large in the peak period of cooking. If a large-sized central range hood is adopted, the exhaust air volume of the fan in unit time is increased, but the noise and vibration of the fan are increased, and the requirements of residential buildings are not met.
Based on the above, the invention provides a central range hood, a controller and a control method, wherein a plurality of small-specification fans are combined, and the opening number of the fans is determined through the opening number of the power distribution valves under the condition of meeting the requirement of the air exhaust volume. The present invention will be described in detail by way of examples.
In the control method of the central range hood provided by the embodiment, the method of the embodiment is applied to a controller, and the controller is respectively connected with a fan and power distribution valves positioned on each floor; the number of the fans is at least two.
Specifically, the central extractor hood includes a controller, a fan, a power distribution valve located on each floor, and an extractor hood located in a kitchen on each floor, and referring to fig. 6, the controller 58 is respectively connected to the power distribution valve on floor 1, the power distribution valve on floor 2 … …, and the power distribution valve on the top floor, and is respectively connected to the fan # 1, the fan #2 … …, and the fan # n. The power distribution valve is electrically connected with the range hood; the fan is installed in public flue, and the quantity of fan is at least two, and every fan is connected with the controller electricity respectively.
The fan is arranged at the air outlet of the common flue of the house roof and plays a role in assisting in discharging smoke for the oil smoke in the common flue; the fans are connected in parallel, namely the fans are respectively electrically connected with the controller.
The range hood is connected with the public flue through a connecting pipe, the power distribution valve is installed on the connecting pipe, the power distribution valve is communicated with the controller in a wired and wireless mode, and the adjustment of the smoke discharge amount of the kitchen is realized by adjusting the opening degree of the valve.
The controller is installed on the fan and is electrically connected with the fan for controlling the working state of the fan. The central range hood also comprises a fire damper which is also arranged on the connecting pipe.
Preferably, the range hood of the embodiment comprises a smoke hood and a control panel, wherein the control panel is electrically connected with the power distribution valve, and when a user presses a start key on the control panel, the control panel sends a starting signal to the power distribution valve; the power distribution valve is opened according to the starting signal. And after the power distribution valve is opened, the working condition information of the power distribution valve is sent to the controller.
Referring to fig. 1, the method of the present embodiment includes the steps of:
and S110, acquiring current working condition information, wherein the working condition information comprises the number information of the power distribution valves in the opening state.
In this step, the operating condition information refers to operating condition information, and in this embodiment, the controller obtains current operating condition information sent by the power distribution valves of each floor, and calculates the number information of the power distribution valves in the open state according to the operating condition information of the power distribution valves of each floor.
S120, determining running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
in this step, the start-up fan refers to a fan in a working state (or an on state), and correspondingly, the shut-down fan refers to a fan in a non-working state (an off state or a standby state).
In this embodiment, the number information of the started fans (fans that need to be started) is determined according to the number information of the power distribution valves in the open state.
And S130, controlling the fan to execute the running state information.
In this step, the fans of corresponding number are started and operated according to the information of the number of the starting fans determined in the step S120.
Compared with the condition that the fans with larger specifications (larger air suction amount) meet the requirement of large air discharge amount of the super high-rise building, the fan parallel operation method can operate the fans with corresponding amount according to the working condition information, and can meet the air discharge amount by adopting the fans with smaller specifications to operate in parallel on the premise of meeting the requirement of the large air suction amount; the embodiment has low noise and small vibration amplitude, and can meet the requirements of residential design. Moreover, as the multiple fans work cooperatively, the service life of the fans can be prolonged; because the fans are connected in parallel to work, all the fans do not need to be closed during maintenance, and therefore maintenance is facilitated.
Preferably, the fan is mounted in a common flue; the working condition information also comprises floor information and valve opening information of the power distribution valve in an opening state, and specification information of the public flue; the step S120 of the above embodiment includes the steps of:
determining the air exhaust amount according to the current working condition information;
determining the working point information of the fan according to the air exhaust amount; the working point information comprises an air volume value and an air pressure value when the fan works at the working point;
and determining the running state information of the fan according to the working point information and the wind pressure-wind volume relation curve of the fan.
Specifically, the air discharge amount in this embodiment refers to the air discharge amount of the fans, and this embodiment determines the number of fans that need to be turned on according to the air discharge amount demand, and usually, the air discharge amount demand can be calculated by acquiring data of the power distribution valve in the on state. The number of fans 51 to be turned on can be calculated according to the required air discharge amount and the air discharge amount of each fan.
However, the exhaust air volume is related to the floor and the opening degree of the power distribution valve, and the opening degree of the power distribution valve is different between floors in order to equalize the air volume. In addition, the length, width, height and other specification information of the public flue also influences the air exhaust amount.
In order to make the calculation more accurate, the embodiment also obtains the floor information and the valve opening information of the power distribution valve in the open state and the specification information of the public flue, and determines the air exhaust volume according to the information; and determining the working point information of the fan according to the air exhaust amount.
The operating point information of the wind turbine in this embodiment includes an air volume value Q and an air pressure value Q, i.e., the operating point is represented by (P)0，Q0)。
Further, determining the running state information of the fan according to the working point information and the wind pressure-wind volume relation curve of the fan, including:
determining a wind pressure value P when the fans are operated in parallel when N is 1, 2 and 3 … according to the wind volume value when the fans are operated at the operating point, the maximum frequency of the fans and the following formula (1)1、P2、P3…；
In formula (1), N is the number of fans, and N is 1, 2, 3 …; pNThe wind pressure value mu of the N fans in parallel operationNThe working efficiency of N fans in parallel operation is shown, Q is the air volume value of the fan when a single fan operates, and R is the frequency of the fan when the single fan operates;
according to the working point information and the wind pressure value P1、P2、P3…, and determining the number information of the starting fans according to the position of the predetermined wind pressure-wind volume relation curve; and determining a relation curve of the wind pressure and the wind volume according to the maximum frequency of the fan and the formula (1).
Specifically, in equation (1), the wind pressure value P when a single fan operates1F (Q, R), two fans operating in parallel
When three fans are in parallel operation
And so on. In these equations, μNIs a predetermined value. When the controller determines the operating point (P) of the fan0，Q0) Then, Q is added0Substituting into the equations to obtain the wind pressure value P1、P2、P3…, for example.
The curve of wind pressure-wind volume (P-Q curve) is the relation curve of wind pressure and wind volume of the fan. In this embodiment, different values of N correspond to different P-Q curves, as shown in fig. 2. PredeterminationMaximum frequency R of fixed fanmaxR is to bemaxAnd N ═ 1, 2, 3 … into equation (1); in fig. 2, a curve S1 is a P-Q curve of a single fan when N is 1, a curve S2 is a P-Q curve when two fans are operated in parallel when N is 2, a curve S3 is a P-Q curve when three fans are operated in parallel when N is 3, and a curve S4 is a P-Q curve when four fans are operated in parallel when N is 4.
Obtaining a wind pressure value P1、P2、P3…, according to the operating point (P)0，Q0) Determining P0And determining the number information of the fans in the working pressure interval in combination with the graph 2. If P is0≤P1If the fan is not operated, the fan is operated; if P is1<P0≤P2If the number of the host machines in parallel operation is 2; if P2<P0≤P3If the number of the host machines in parallel operation is 3; and so on.
The method determines the starting number of the fans according to the working points and the P-Q curves of the fans, and is high in reliability, simple and efficient.
Further, the operation state information further includes frequency information of the starting-up fan, and the method of the above embodiment further includes the following steps:
and determining the frequency information of the starting-up fan according to the quantity information and the working point information of the starting-up fan and the formula (1).
Specifically, the above embodiment determines the number of the fans started, that is, the N value, and substitutes the N value into equation (1) to obtain the R value, that is, the operating frequency of the fans. When the fan is running, the fan exhausts air at the frequency.
In a possible implementation, the method of the above embodiment further comprises the steps of:
comparing the accumulated running time of each starting-up fan with a preset time threshold;
when the accumulated running time of at least one startup fan reaches a preset time threshold and relevant fans are detected, closing the startup fans of which the running time reaches the preset time threshold and starting a corresponding number of shutdown fans; when all fans are started, whether the fans need to be stopped is detected, and if yes, the fans with accumulated time reaching a preset time threshold are closed.
In this step, the shutdown fan refers to a fan currently in a non-operating state (shutdown state).
Firstly, numbering N fans to number # 1 and #2 … … # N, and timing the starting fans respectively to obtain the operation time Ts of each starting fan. Comparing the operation time Ts of each starting-up fan with a preset time threshold Tb, detecting whether fans which do not operate exist in the system when the accumulated operation time Ts of a certain fan reaches Tb, if yes, stopping the operation of the fans which reach Tb, and starting a corresponding number of fans which do not operate; meanwhile, resetting the operation time Ts of the fan which stops operating; if all fans are in operation, no operation is carried out until the fans need to be shut down (the exhaust air volume requirement of the system is reduced), the fan modules with the accumulated operation time reaching Tb are firstly closed, and the accumulated operation time Ts is cleared.
When whether the fan needs to be stopped (the requirement of the exhaust air volume of the system is reduced) is detected, whether the partial fan needs to be stopped or not is judged to be determined by detecting whether the power distribution valve is closed or not (namely, the range hood is closed by a kitchen).
In specific implementation, referring to fig. 3, the method of this embodiment may include the following steps:
s310, counting the accumulated operation time Ts of each fan;
s320, comparing the accumulated operation time Ts of each fan with a preset time threshold Tb respectively;
s330, judging whether Ts is greater than Tb, if yes, turning to the step S350; if not, go to step S340;
s340, normally operating;
s350, detecting whether the fan is related, if so, executing the step S360, otherwise, turning to the step S370;
s360, stopping the fan with the running time reaching Tb, and starting a new fan;
and S370, continuously detecting until the fan needs to be stopped, and firstly closing the fan with the accumulated running time reaching Tb.
In the embodiment, when the running time of a single fan is too long, the fan with too long running time is replaced by the rear air supply fan, so that the long-term stable running of the whole system is ensured, and the service life of the fan is prolonged.
In summary, the central range hood control method provided by the embodiment can realize a large air exhaust amount by adopting a plurality of fans with small specifications, and the embodiment has low noise and small vibration amplitude and can meet the requirements of residential design; the embodiment can realize cross work among different fans, thereby further prolonging the service life of the fans; each fan operates independently, when a certain fan needs to be maintained, the fan is shut down, other fans operate normally, and the use of a user is not influenced, so that the maintenance is convenient.
Referring to fig. 4, in the controller of the central range hood provided in this embodiment, the controller is respectively connected to the fan and the power distribution valve located on each floor; the number of the fans is at least two; the controller includes:
the obtaining module 41 is configured to obtain current working condition information, where the working condition information includes information on the number of power distribution valves in an open state;
the determining module 42 is configured to determine running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
and the operation module 43 is used for controlling the fan to execute the operation state information.
Optionally, the fan is mounted in a common flue; the working condition information also comprises floor information and valve opening information of the power distribution valve in an opening state, and specification information of the public flue; the determination module 42 in the above embodiment includes the following modules:
the air exhaust amount determining module is used for determining the air exhaust amount according to the current working condition information;
the working point determining module is used for determining the working point information of the fan according to the air exhaust amount; the working point information comprises an air volume value and an air pressure value when the fan works at the working point;
and the running state determining module is used for determining the running state information of the fan according to the working point information and the wind pressure-wind volume relation curve of the fan.
Optionally, the operation state determining module in the above embodiment includes the following modules:
a wind pressure value determining module, which is used for respectively determining the wind pressure value P when the fans are operated in parallel when N is 1, 2 and 3 … according to the wind volume value when the fans work at the working point, the maximum frequency of the fans and the following formula (1)1、P2、P3…；
In formula (1), N is the number of fans, and N is 1, 2, 3 …; pNThe wind pressure value mu of the N fans in parallel operationNThe working efficiency of N fans in parallel operation is shown, Q is the air volume value of the fan when a single fan operates, and R is the frequency of the fan when the single fan operates;
a starting-up fan quantity determining module for determining the quantity of the starting-up fans according to the working point information and the wind pressure value P1、P2、P3…, and determining the number information of the starting fans according to the position of the predetermined wind pressure-wind volume relation curve; and determining a relation curve of the wind pressure and the wind volume according to the maximum frequency of the fan and the formula (1).
Optionally, the running state information further includes frequency information of the starting-up fan, and the apparatus of the above embodiment further includes the following modules:
and the fan frequency determining module is used for determining the frequency information of the started fans according to the quantity information and the working point information of the started fans and the formula (1).
Further, the apparatus of the above embodiment further includes the following modules:
the comparison module is used for comparing the accumulated running time of each starting-up fan with a preset time threshold;
and the switching module is used for closing the starting fans with the running time reaching the preset time threshold and starting the corresponding number of shutdown fans when the accumulated running time of at least one starting fan reaches the preset time threshold and the relevant fans are detected.
Further, the apparatus of the above embodiment further includes the following modules:
the detection module is used for detecting whether the fans need to be shut down or not when all the fans are started, and if so, the fans with accumulated time reaching a preset time threshold value are shut down.
Referring to fig. 5 and 7, the central extractor hood provided in this embodiment includes at least two fans 51, power distribution valves 55 located on each floor, an extractor hood 56 located in a kitchen on each floor, and the controller of the above embodiment; the power distribution valve 55 is connected with the range hood 56 of the corresponding floor. Referring to fig. 6, controller 58 is connected to power distribution valves from floor 1, floor 2 … … to the top floor, respectively, and fan # 1, fan #2 … … to fan # n, respectively. Further, the central range hood further comprises a static pressure box 54, a plurality of reducer pipes 52 and a plurality of control air valves 53, wherein the number of the reducer pipes is matched with that of the fans; the fan 51, the reducer pipe 52 and the control air valve 53 are connected in sequence; the control blast gate 53 is connected to a plenum 54, and the plenum 54 is connected to a common flue 57.
In the present embodiment, the static pressure box 54 is a necessary component for reducing dynamic pressure, increasing static pressure, stabilizing air flow and reducing air flow vibration in the central range hood of the present embodiment, and it can make the air supply effect more desirable. The plenum 54 is a device that both allows airflow and effectively prevents or attenuates the outward propagation of acoustic energy.
Specifically, the static pressure box 54 may change a portion of the dynamic pressure to static pressure to blow the wind further; moreover, noise can be further reduced; the plenum 54 enables uniform distribution of air volume and reduces dynamic pressure loss. But also has the function of a universal joint. Plenum 54 is used in the system to improve the overall performance of the ventilation system.
In addition, since a plurality of fans need to be connected, the diameter of the plenum 54 gradually increases from the end of the plenum 54 connected to the common flue 57.
The fans 51 of the present embodiment are operated in parallel, and in order to improve the air exhaust effect, the present embodiment separates each fan 51 through the reducer 52 and the control air valve 53, so that each fan 51 can operate independently without mutual interference. However, since the calibers of the control air valve 53 and the fan 51 are not the same, the present embodiment further requires a reducer 52 with two ends respectively adapted to the calibers of the control air valve and the fan to connect the two.
In this embodiment, the central range hood further includes a fire damper, and the fire damper is installed at a connection end between the connection pipe (the connection pipe is used for connecting the range hood and the common flue) and the common flue. Preferably, the number of the fans is 2-5. The fan is positioned at the air outlet of the building top and at the tail end of the system, the reducer pipe is positioned at the front section of the fan, and the control air valve is communicated with the static pressure box; the power distribution valve is positioned at the interface of the common flue and the connecting pipe. Referring to fig. 8, an embodiment of the present invention further provides an electronic device 400, which includes a communication interface 401, a processor 402, a memory 403, and a bus 404, where the processor 402, the communication interface 401, and the memory 403 are connected by the bus 404; the memory 403 is used for storing a computer program for supporting the processor 402 to execute the central extractor hood control method, and the processor 402 is configured to execute the program stored in the memory 403.
Optionally, an embodiment of the present invention further provides a computer readable medium having a non-volatile program code executable by the processor 402, where the program code causes the processor 402 to execute the central extractor hood control method in the foregoing embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method of a central range hood is characterized in that the control method is applied to a controller, and the controller is respectively connected with a fan and power distribution valves positioned on each floor; the number of the fans is at least two; the method comprises the following steps:
acquiring current working condition information, wherein the working condition information comprises the quantity information of the power distribution valves in an opening state;
determining running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
and controlling the fan to execute the running state information.
2. The method of claim 1, wherein the fan is mounted in a common flue; the working condition information also comprises floor information and valve opening information of the power distribution valve in an opening state, and specification information of the public flue; determining the running state information of the fan according to the current working condition information, comprising the following steps:
determining the air exhaust amount according to the current working condition information;
determining the working point information of the fan according to the air exhaust amount; the working point information comprises an air volume value and an air pressure value when the fan works at a working point;
and determining the running state information of the fan according to the working point information and the wind pressure-wind volume relation curve of the fan.
3. The method of claim 2, wherein determining the operating state information of the fan according to the operating point information and the wind pressure-wind volume relation curve of the fan comprises:
determining a wind pressure value P when the fans are operated in parallel when N is 1, 2 and 3 … according to the wind volume value when the fans are operated at the operating point, the maximum frequency of the fans and the following formula (1)1、P2、P3…；
In equation (1), N is the number of fans, and N is equal to1，2，3…；PNThe wind pressure value mu of the N fans in parallel operationNThe working efficiency of N fans in parallel operation is shown, Q is the air volume value of the fan when a single fan operates, and R is the frequency of the fan when the single fan operates;
according to the working point information and the wind pressure value P1、P2、P3…, and determining the number information of the starting fans according to the position of the predetermined wind pressure-wind volume relation curve; and determining a relation curve of the wind pressure and the wind volume according to the maximum frequency of the fan and the formula (1).
4. The method of claim 3, wherein the operational status information further comprises frequency information of a starting fan, the method further comprising:
and determining the frequency information of the starting-up fan according to the quantity information and the working point information of the starting-up fan and the formula (1).
5. The method of claim 2, further comprising:
comparing the accumulated running time of each starting-up fan with a preset time threshold;
and when the accumulated running time of at least one startup fan reaches a preset time threshold and the relevant fans are detected, closing the startup fans of which the running time reaches the preset time threshold and starting a corresponding number of shutdown fans.
6. The method of claim 5, further comprising:
when all fans are started, whether the fans need to be stopped is detected, and if yes, the fans with accumulated time reaching a preset time threshold are closed.
7. A controller of a central range hood is characterized in that the controller is respectively connected with a fan and power distribution valves positioned on each floor; the number of the fans is at least two; the controller includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring current working condition information, and the working condition information comprises the quantity information of power distribution valves in an opening state;
the determining module is used for determining the running state information of the fan according to the current working condition information; the running state information comprises the number information of the started fans;
and the operation module is used for controlling the fan to execute the operation state information.
8. A central range hood is characterized by comprising at least two fans, power distribution valves positioned on all floors, range hoods positioned in kitchens on all floors and a controller according to claim 7; the power distribution valve is connected with the range hood on the corresponding floor.
9. The central range hood according to claim 8, further comprising a static pressure box, a plurality of reducer pipes corresponding to the number of fans, and a plurality of control air valves corresponding to the number of fans; the fan, the reducer pipe and the control air valve are sequentially connected; the control air valve is connected with the static pressure box, and the static pressure box is connected with a common flue.
10. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to perform the method of any of claims 1 to 6.
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| CN202010570918.5A CN111520790A (en) | 2020-06-19 | 2020-06-19 | Central range hood, controller and control method |
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| CN112484110A (en) * | 2020-11-10 | 2021-03-12 | 华帝股份有限公司 | Smoke discharge control method and control system for public flue |
| CN113834109A (en) * | 2021-11-08 | 2021-12-24 | 杭州老板电器股份有限公司 | Networking configuration method and system for central range hood |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112484110A (en) * | 2020-11-10 | 2021-03-12 | 华帝股份有限公司 | Smoke discharge control method and control system for public flue |
| CN112484110B (en) * | 2020-11-10 | 2022-12-02 | 华帝股份有限公司 | Smoke discharge control method and control system for public flue |
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| CN113883572A (en) * | 2021-11-08 | 2022-01-04 | 杭州老板电器股份有限公司 | Floor configuration method and system for power distribution valve of central range hood and electronic equipment |
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