CN114543140B - Air quantity control method and device for kitchen and bathroom air exhaust system - Google Patents
Air quantity control method and device for kitchen and bathroom air exhaust system Download PDFInfo
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- CN114543140B CN114543140B CN202210178648.2A CN202210178648A CN114543140B CN 114543140 B CN114543140 B CN 114543140B CN 202210178648 A CN202210178648 A CN 202210178648A CN 114543140 B CN114543140 B CN 114543140B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000013461 design Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 10
- 239000003517 fume Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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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
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
-
- 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
-
- 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
- F24F7/007—Ventilation with forced flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Ventilation (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
Abstract
The invention provides an air quantity control method and a device of a kitchen and bathroom exhaust system, which relate to the technical field of equipment control and comprise the following steps: after a first starting-up signal sent by a kitchen range hood in a building to be controlled and a second starting-up signal sent by a bathroom ventilator are obtained, calculating a first target wind pressure of the target kitchen range hood and a second target wind pressure of the target bathroom ventilator by using preset parameters; determining a system power demand point based on the first target wind pressure, the second target wind pressure and preset parameters; based on the system power demand point and a preset curve, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator are adjusted, so that the kitchen range hood and the bathroom ventilator exhaust air in an equalizing mode, and the technical problem that in the prior art, the kitchen and the bathroom in each layer of a building are difficult to exhaust air in an equalizing mode is solved.
Description
Technical Field
The invention relates to the technical field of equipment control, in particular to an air quantity control method and device of a kitchen and bathroom air exhaust system.
Background
The kitchen fume exhaust of the existing residential building is to exhaust the roof through a kitchen public exhaust passage, and the bathroom ventilation is to exhaust the roof through a bathroom public flue, and the two sets of exhaust modes are mutually independent. The kitchen exhaust fume can pass through a range hood or concentrated exhaust fume, and the bathroom exhaust fume has natural ventilation, a bathroom ventilator or a concentrated mechanical exhaust fume mode.
However, the air exhaust mode has the problem that the air exhaust of the lower layer is unsmooth in the use peak period due to the balanced air exhaust of the kitchen and the toilet of each layer in the residential building.
An effective solution to the above-mentioned problems has not been proposed yet.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for controlling the air volume of a kitchen and bathroom air exhaust system, so as to alleviate the technical problem that it is difficult to perform balanced air exhaust on the kitchen and bathroom of each layer in a building in the prior art.
In a first aspect, an embodiment of the present invention provides a method for controlling an air volume of a kitchen and bathroom exhaust system, including: after a first starting signal sent by a kitchen ventilator in a building to be controlled and a second starting signal sent by a bathroom ventilator are obtained, calculating a first target wind pressure of the target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters, wherein the target kitchen ventilator is a kitchen ventilator positioned at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is a bathroom ventilator positioned at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is a wind pressure required when the exhaust volume of the target kitchen ventilator is a first preset exhaust volume, and the second target wind pressure is a wind pressure required when the exhaust volume of the target bathroom ventilator is a second preset exhaust volume; determining a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameter, wherein the abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure in the first target wind pressure and the second target wind pressure, the ordinate of the system power demand point is total wind quantity, and the total wind quantity is the sum of the exhaust quantity of the kitchen range hood and the exhaust quantity of the toilet ventilator; based on the system power demand point and a preset curve, adjusting the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of a bathroom flow distribution valve corresponding to the bathroom ventilator so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of a host; wherein, the preset parameters include: the kitchen range hood comprises a floor where the kitchen range hood is located, the cross-sectional dimension of a kitchen public flue and the roughness of the kitchen public flue, the number of bathroom ventilators and the preset air exhaust volume of the bathroom single user, the floor where the bathroom ventilators are located and the cross-sectional dimension of a bathroom exhaust passage, and the first preset air exhaust volume and the second preset air exhaust volume.
Further, the preset parameters include: the number of kitchen range hoods, the floor where the kitchen range hoods are located, the cross-sectional dimension of a kitchen public flue, the roughness of the kitchen public flue, the number of bathroom ventilators, the preset air exhaust volume of a bathroom single household, the floor where the bathroom ventilators are located, the cross-sectional dimension of a bathroom exhaust passage, the first preset air exhaust volume and the second preset air exhaust volume; the calculation formula of the sum of the exhaust quantity of the kitchen range hood and the exhaust quantity of the toilet ventilator isWherein/>Is the sum of the exhaust air quantity of the kitchen range hood and the exhaust air quantity of the toilet ventilator,/>For the first preset air discharge rate,/>For the number of kitchen range hoods,/>For the second preset air discharge rate,/>The number of toilet ventilators.
Further, if the system power demand point is located at the inner side of the preset curve, based on the system power demand point and the preset curve, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator, including: determining the actual running frequency of the host corresponding to the system power demand point based on the preset curve; based on the actual running frequency of the host, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the opening and closing degree corresponding to the first preset exhaust amount, and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the toilet ventilator is the second preset exhaust amount.
Further, if the system power demand point is located outside the preset curve, based on the system power demand point and the preset curve, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator, including:
Determining a maximum operating frequency of a host corresponding to the system power demand point based on the preset curve so that the host operates at the corresponding maximum operating frequency of the host; determining a first target air discharge amount corresponding to the third target air pressure when the host operates at the corresponding maximum operating frequency of the host, and calculating a difference value between the total air discharge amount and the first target air discharge amount; and adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator based on the difference value and the preset parameter.
Further, if the working time of the kitchen and bathroom exhaust system is in a preset time period, based on the difference value and the preset parameter, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator, including: adjusting the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator to the second preset opening and closing degree so that the air volume discharged by the toilet ventilator is the second preset air volume; calculating a second target air discharge rate of the single kitchen user based on the preset air discharge rate of the single kitchen user, the number of the kitchen range hoods and the difference value; and adjusting the kitchen flow distribution valve corresponding to the kitchen range hood to the opening and closing degree corresponding to the second target air discharge quantity so that the air discharge quantity of the kitchen range hood is the second target air discharge quantity.
Further, if the working time of the kitchen and bathroom exhaust system is not in the preset time period, based on the difference value and the preset parameter, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator, including: the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the first preset opening and closing degree, so that the air discharge quantity of the kitchen range hood is the first preset air discharge quantity; calculating a third target air discharge rate of the single bathroom user based on the preset air discharge rate of the single bathroom user, the number of the bathroom ventilators and the difference value; and adjusting the toilet flow distribution valve corresponding to the toilet ventilator to the opening and closing degree corresponding to the third target air discharge quantity so that the air discharge quantity of the toilet ventilator is the third target air discharge quantity.
Further, before calculating the first target wind pressure of the target kitchen range hood and the second target wind pressure of the target toilet ventilator using the preset parameters, the method further includes: and controlling the kitchen air volume total control valve and the bathroom air volume total control valve to be opened to a first preset angle, and controlling the target kitchen flow distribution valve and the target bathroom flow distribution valve to be opened to a second preset angle.
In a second aspect, an embodiment of the present invention further provides an air volume control device of a kitchen and bathroom exhaust system, including: the kitchen ventilator comprises a main machine, a kitchen air volume total control valve, a kitchen flow distribution valve, a kitchen range hood, a bathroom air volume total control valve, a bathroom flow distribution valve, a bathroom ventilator and an induction detector, wherein a kitchen flow distribution valve and a kitchen range hood are arranged in each kitchen; the host is used for calculating a first target wind pressure of a target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters after a first starting signal sent by the kitchen ventilator in a building to be controlled and a second starting signal sent by the bathroom ventilator are obtained, wherein the target kitchen ventilator is the kitchen ventilator at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is the bathroom ventilator at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is the wind pressure required when the exhaust volume of the target kitchen ventilator is the first preset exhaust volume, and the second target wind pressure is the wind pressure required when the exhaust volume of the target bathroom ventilator is the second preset exhaust volume; the host is configured to determine a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameter, where an abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure of the first target wind pressure and the second target wind pressure, an ordinate of the system power demand point is a total air volume, and the total air volume is a sum of an exhaust volume of the kitchen ventilator and an exhaust volume of the toilet ventilator; the host is used for adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator based on the system power demand point and a preset curve so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of the host; the host is further configured to determine an actual operating frequency of the host corresponding to the system power demand point based on the preset curve if the system power demand point is located at the inner side of the preset curve; based on the actual running frequency of the host, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the opening and closing degree corresponding to the first preset exhaust amount, and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the toilet ventilator is the second preset exhaust amount.
Further, the host machine is also used for providing power for the kitchen and bathroom exhaust system and purifying the gas in the kitchen and the bathroom.
Further, the kitchen air volume total control valve is used for controlling the total flow of the kitchen public exhaust passage; the bathroom air volume total control valve is used for controlling the total flow of the bathroom public exhaust passage.
According to the embodiment of the invention, after a first starting signal sent by a kitchen ventilator in a building to be controlled and a second starting signal sent by a bathroom ventilator are obtained, a first target wind pressure of the target kitchen ventilator and a second target wind pressure of the target bathroom ventilator are calculated by using preset parameters, wherein the target kitchen ventilator is the kitchen ventilator at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is the bathroom ventilator at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is the wind pressure required when the exhaust volume of the target kitchen ventilator is a first preset exhaust volume, and the second target wind pressure is the wind pressure required when the exhaust volume of the target bathroom ventilator is a second preset exhaust volume; determining a system power demand point based on the first target wind pressure, the second target wind pressure and preset parameters, wherein the abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure in the first target wind pressure and the second target wind pressure, the ordinate of the system power demand point is total wind quantity, and the total wind quantity is the sum of the wind quantity of the kitchen range hood and the wind quantity of the toilet ventilator; based on the system power demand point and a preset curve, the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of a bathroom flow distribution valve corresponding to the bathroom ventilator are adjusted so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air volume and air pressure corresponding to the maximum design working frequency of the main machine.
According to the embodiment of the invention, the starting-up quantity of the bathroom ventilators and the starting-up quantity of the kitchen range hoods are obtained in real time, and the preset exhaust quantity of each kitchen unit, the quantity of the kitchen range hoods, the floor where the kitchen range hoods are located, the section size of the kitchen public flue, the roughness of the kitchen public flue, the quantity of the bathroom ventilators, the preset exhaust quantity of each bathroom unit, the floor where the bathroom ventilators are located, the section size of the bathroom exhaust channel, the first preset exhaust quantity and the second preset exhaust quantity are combined, so that the exhaust quantity of the kitchen range hoods and the bathroom ventilators on each floor of a building is regulated in real time, the purpose of carrying out balanced exhaust on the kitchen and the bathroom on each floor in the building is achieved, and the technical problem that balanced exhaust is difficult to be carried out on the kitchen and the bathroom on each floor in the building in the prior art is solved, and the technical effect for 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 above objects, features and advantages of the present invention more 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for controlling air volume of a kitchen and bathroom air exhaust system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an air volume control device of a kitchen and bathroom air exhaust system according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, 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 embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
according to an embodiment of the present invention, there is provided an embodiment of an air volume control method for a kitchen and bathroom air exhaust system, it should be noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown herein.
Fig. 1 is a flowchart of a method for controlling air volume of a kitchen and bathroom air exhaust system according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
Step S102, after a first starting signal sent by a kitchen ventilator in a building to be controlled and a second starting signal sent by a bathroom ventilator are obtained, calculating a first target wind pressure of the target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters, wherein the target kitchen ventilator is a kitchen ventilator positioned at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is a bathroom ventilator positioned at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is a wind pressure required when the exhaust volume of the target kitchen ventilator is a first preset exhaust volume, and the second target wind pressure is a wind pressure required when the exhaust volume of the target bathroom ventilator is a second preset exhaust volume;
Step S104, determining a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameters, wherein the abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure in the first target wind pressure and the second target wind pressure, the ordinate of the system power demand point is a total wind quantity, and the total wind quantity is the sum of the exhaust quantity of the kitchen range hood and the exhaust quantity of the toilet ventilator;
Step S106, based on the system power demand point and a preset curve, adjusting the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of a bathroom flow distribution valve corresponding to the bathroom ventilator so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of a host;
It should be noted that the preset parameters include: the kitchen range hood comprises a floor where the kitchen range hood is located, the cross-sectional dimension of a kitchen public flue and the roughness of the kitchen public flue, the number of bathroom ventilators and the preset air exhaust volume of the bathroom single user, the floor where the bathroom ventilators are located and the cross-sectional dimension of a bathroom exhaust passage, and the first preset air exhaust volume and the second preset air exhaust volume.
According to the embodiment of the invention, the starting-up quantity of the bathroom ventilators and the starting-up quantity of the kitchen range hoods are obtained in real time, and the preset exhaust quantity of each kitchen unit, the quantity of the kitchen range hoods, the floor where the kitchen range hoods are located, the section size of the kitchen public flue, the roughness of the kitchen public flue, the quantity of the bathroom ventilators, the preset exhaust quantity of each bathroom unit, the floor where the bathroom ventilators are located, the section size of the bathroom exhaust channel, the first preset exhaust quantity and the second preset exhaust quantity are combined, so that the exhaust quantity of the kitchen range hoods and the bathroom ventilators on each floor of a building is regulated in real time, the purpose of carrying out balanced exhaust on the kitchen and the bathroom on each floor in the building is achieved, and the technical problem that balanced exhaust is difficult to be carried out on the kitchen and the bathroom on each floor in the building in the prior art is solved, and the technical effect for experience is improved.
In the embodiment of the present invention, the specific process of step S102 is as follows:
When the range hood is started, the kitchen flow distribution valve detects a starting signal of the range hood and sends the starting signal to the roof host, and the kitchen air volume total control valve is opened (opening 90 °); meanwhile, the lowest-layer startup range hood (namely, the target kitchen range hood) in the system is detected And opens its corresponding flow distribution valve angle to 90 deg.. Then, fitting a functional relation/>, according to the working condition of the system(/>,/>,/>,/>,/>,/>,/>) Kitchen single-user preset air discharge quantityNumber of kitchen range hoods/>Floor/>, where kitchen range hood is locatedKitchen common flue section size/>×/>Kitchen public flue roughness/>Total exhaust volume (/ >) of toilet exhaust passage×/>) Number of toilet ventilators/>Calculating the first preset set air quantity/>, of the target kitchen range hoodFirst target wind pressure/>, required at that time。
When the toilet ventilator is started, the toilet flow distribution valve detects a starting signal of the ventilator and sends the starting signal to the roof host, and the toilet air volume total control valve is opened (opening 90 °); at the same time, the lowest-floor startup toilet ventilator (i.e., target toilet ventilator) in the system is detectedAnd opens its corresponding flow distribution valve angle to 90 deg.. Then, fitting a functional relation/>, according to the working condition of the system(/>,/>,/>,/>,/>,/>,/>) [ Bathroom Single household preset air discharge volume/>Number of kitchen range hoods/>Floor/>, where toilet ventilator is locatedThe cross section size of the exhaust passage of the toilet/>×/>Roughness of exhaust passage of toilet/the likeTotal exhaust volume of kitchen exhaust duct (/ >)×/>) Number of kitchen ventilators/>Calculating the second preset air discharge rate/>, of the target toilet ventilatorThe second target wind pressure/>, required at that time。
In the embodiment of the present invention, the specific process of step S104 is as follows:
Firstly, judging the size between the first target wind pressure and the second target wind pressure, and determining the larger target wind pressure in the first target wind pressure and the second target wind pressure as the abscissa of the system power demand point 。
Then, the calculation formula for calculating the sum of the air discharge quantity of the kitchen range hood and the air discharge quantity of the toilet ventilator is used asAnd determining the sum of the air discharge quantity of the kitchen range hood and the air discharge quantity of the toilet ventilator as the ordinate of a system power demand point, wherein/>Is the sum of the exhaust air quantity of the kitchen range hood and the exhaust air quantity of the toilet ventilator,/>For the first preset exhaust air volume,/>For the number of kitchen range hoods,/>For the second preset exhaust air volume,/>The number of toilet ventilators.
Thereby obtaining the power demand point of the system。
In the embodiment of the present invention, if the system power demand point is located inside the preset curve, step S106 includes the following steps:
step S21, determining the actual running frequency of the host corresponding to the system power demand point based on the preset curve;
Step S22, based on the actual running frequency of the host, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood to the opening and closing degree corresponding to the first preset exhaust amount, and adjusting the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the bathroom ventilator is the second preset exhaust amount.
In the embodiment of the invention, if the target curve is inside (i.e., left lower side) the maximum operating frequency performance curve of the host, the actual operating frequency of the host is determined according to the target curve; Synchronization, fitting a relation according to local resistance of the flow distribution valveAdjusting the opening/>, of the flow distribution valve of each kitchen and toilet、/>The exhaust volume of the kitchen range hood of each floor meets the first preset exhaust volume, and the exhaust volume of the toilet ventilator meets the second preset exhaust volume.
In the embodiment of the present invention, the system power demand point is located outside the preset curve, and step S106 includes the following steps:
step S31, determining the maximum operating frequency of the host corresponding to the system power demand point based on the preset curve, so that the host operates at the corresponding maximum operating frequency of the host;
Step S32, determining a first target air discharge rate corresponding to the third target air pressure when the host operates at the corresponding maximum operating frequency of the host, and calculating a difference value between the total air discharge rate and the first target air discharge rate;
And step S33, based on the difference value and the preset parameter, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator.
In the embodiment of the invention, if the system power is required to be at the pointOutside (i.e., upper right side) of the power performance curve at the maximum operating frequency of the host machine, the host machine operates at the maximum design operating frequency while determining a third target wind pressure/>, at this time, from the target curveThe lower corresponding target exhaust volume/>And calculate the total air volume/>And a first target exhaust volume/>Difference between。
And then, according to the difference value and the preset parameter, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator.
In the embodiment of the present invention, if the working time of the kitchen and bathroom exhaust system is in the preset time period, step S33 includes the following steps:
Step S41, adjusting the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator to the second preset opening and closing degree so that the air volume discharged by the toilet ventilator is the second preset air volume;
step S42, calculating a second target air discharge rate of the single kitchen user based on the preset air discharge rate of the single kitchen user, the number of the kitchen range hoods and the difference value;
and step S43, adjusting the kitchen flow distribution valve corresponding to the kitchen range hood to the opening and closing degree corresponding to the second target air discharge quantity so that the air discharge quantity of the kitchen range hood is the second target air discharge quantity.
It should be noted that, in general, the above-mentioned preset time period is from 6 a.m. to 8 a.m. for the operator.
If the working time of the kitchen and bathroom exhaust system is in the preset time period, adjusting the opening of the bathroom flow distribution valve corresponding to each bathroom ventilatorSo that the air discharge rate of the toilet ventilator is the second preset air discharge rate/>。
Then, calculating a second target air discharge quantity of each kitchen fume extractor kitchen individual householdAccording to the relation/>, of opening resistance characteristics of kitchen flow distribution valveAdjusting the opening of the kitchen flow distribution valve plate to enable the actual exhaust air quantity of the kitchen range hood to be the second target exhaust air quantity/>。
In the embodiment of the present invention, if the working time of the kitchen and bathroom exhaust system is not in the preset time period, step S33 includes the following steps:
Step S51, adjusting the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood to the first preset opening and closing degree so that the air discharge quantity of the kitchen range hood is the first preset air discharge quantity;
Step S52, calculating a third target air discharge rate of the single bathroom user based on the preset air discharge rate of the single kitchen user, the number of the bathroom ventilators and the difference value;
and step S53, adjusting the toilet flow distribution valve corresponding to the toilet ventilator to the opening and closing degree corresponding to the third target air discharge quantity so that the air discharge quantity of the toilet ventilator is the third target air discharge quantity.
In the embodiment of the invention, if the working time of the kitchen and bathroom exhaust system is not in the preset time period, the opening of the kitchen flow distribution valve corresponding to the kitchen range hood is adjustedSo that the actual air discharge quantity of the kitchen range hood is the first preset air discharge quantity/>。
Then, the actually available air discharge amount (i.e., the third target air discharge amount) of each toilet is calculatedAccording to the relation/>, of opening resistance characteristics of the toilet flow distribution valveThe opening degree of the toilet flow distribution valve plate is regulated to ensure that the actual air discharge quantity of the toilet ventilator is the third target air discharge quantity/>。
Embodiment two:
The embodiment of the invention also provides an air volume control device of the kitchen and bathroom air exhaust system, which is used for executing the air volume control method of the kitchen and bathroom air exhaust system provided by the embodiment of the invention, and the following is a specific introduction of the air volume control device of the kitchen and bathroom air exhaust system provided by the embodiment of the invention.
As shown in fig. 2, fig. 2 is a schematic diagram of an air volume control device of the kitchen and bathroom air exhaust system, and the air volume control device of the kitchen and bathroom air exhaust system includes: the kitchen ventilator comprises a main machine 10, a kitchen air volume total control valve 20, a kitchen flow distribution valve 30, a kitchen range hood 40, a bathroom air volume total control valve 50, a bathroom flow distribution valve 60, a bathroom ventilator 70 and a sensing detector 80, wherein one kitchen flow distribution valve and one kitchen range hood are arranged in each kitchen;
The host is used for calculating a first target wind pressure of a target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters after a first starting signal sent by the kitchen ventilator in a building to be controlled and a second starting signal sent by the bathroom ventilator are obtained, wherein the target kitchen ventilator is the kitchen ventilator at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is the bathroom ventilator at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is the wind pressure required when the exhaust volume of the target kitchen ventilator is the first preset exhaust volume, and the second target wind pressure is the wind pressure required when the exhaust volume of the target bathroom ventilator is the second preset exhaust volume;
The host is configured to determine a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameter, where an abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure of the first target wind pressure and the second target wind pressure, an ordinate of the system power demand point is a total air volume, and the total air volume is a sum of an exhaust volume of the kitchen ventilator and an exhaust volume of the toilet ventilator;
The host is used for adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator based on the system power demand point and a preset curve so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of the host;
The host is further configured to determine an actual operating frequency of the host corresponding to the system power demand point based on the preset curve if the system power demand point is located at the inner side of the preset curve; based on the actual running frequency of the host, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the opening and closing degree corresponding to the first preset exhaust amount, and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the toilet ventilator is the second preset exhaust amount.
It should be noted that the preset parameters include: the kitchen range hood comprises a floor where the kitchen range hood is located, the cross-sectional dimension of a kitchen public flue and the roughness of the kitchen public flue, the number of bathroom ventilators and the preset air exhaust volume of the bathroom single user, the floor where the bathroom ventilators are located and the cross-sectional dimension of a bathroom exhaust passage, and the first preset air exhaust volume and the second preset air exhaust volume.
According to the embodiment of the invention, the starting-up quantity of the bathroom ventilators and the starting-up quantity of the kitchen range hoods are obtained in real time, and the preset exhaust quantity of each kitchen unit, the quantity of the kitchen range hoods, the floor where the kitchen range hoods are located, the section size of the kitchen public flue, the roughness of the kitchen public flue, the quantity of the bathroom ventilators, the preset exhaust quantity of each bathroom unit, the floor where the bathroom ventilators are located, the section size of the bathroom exhaust channel, the first preset exhaust quantity and the second preset exhaust quantity are combined, so that the exhaust quantity of the kitchen range hoods and the bathroom ventilators on each floor of a building is regulated in real time, the purpose of carrying out balanced exhaust on the kitchen and the bathroom on each floor in the building is achieved, and the technical problem that balanced exhaust is difficult to be carried out on the kitchen and the bathroom on each floor in the building in the prior art is solved, and the technical effect for experience is improved.
Preferably, the main machine is also used for providing power for the kitchen and bathroom exhaust system and purifying the gas in the kitchen and the bathroom.
Preferably, the kitchen air volume total control valve is used for controlling the total flow of the kitchen public exhaust passage; the bathroom air volume total control valve is used for controlling the total flow of the bathroom public exhaust passage.
When the range hood is started, the kitchen flow distribution valve obtains a starting signal and sends the starting signal to a roof host, and meanwhile, the flow distribution valve is opened; the toilet flow distribution valve is interlocked with the sensing detector and the ventilator, when the sensing detector monitors the activity of a person, a signal is sent to the ventilator, the ventilator is started, and after the toilet flow distribution valve monitors the ventilator starting signal, the toilet flow distribution valve is started and the starting signal is sent to the roof host; the kitchen flow distribution valve, the bathroom flow distribution valve and the roof host are communicated in real time in a wired or wireless communication mode.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The air quantity control method of the kitchen and bathroom air exhaust system is characterized by comprising the following steps of:
After a first starting signal sent by a kitchen ventilator in a building to be controlled and a second starting signal sent by a bathroom ventilator are obtained, calculating a first target wind pressure of the target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters, wherein the target kitchen ventilator is a kitchen ventilator positioned at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is a bathroom ventilator positioned at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is a wind pressure required when the air volume of the target kitchen ventilator is a first preset air volume, and the second target wind pressure is a wind pressure required when the air volume of the target bathroom ventilator is a second preset air volume;
Determining a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameter, wherein the abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure in the first target wind pressure and the second target wind pressure, the ordinate of the system power demand point is total wind quantity, and the total wind quantity is the sum of the exhaust quantity of the kitchen range hood and the exhaust quantity of the toilet ventilator;
Based on the system power demand point and a preset curve, adjusting the opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of a bathroom flow distribution valve corresponding to the bathroom ventilator so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of a host;
If the system power demand point is located at the inner side of the preset curve, based on the system power demand point and the preset curve, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator, including:
Determining the actual running frequency of the host corresponding to the system power demand point based on the preset curve;
Based on the actual running frequency of the host, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the opening and closing degree corresponding to the first preset exhaust amount, and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the toilet ventilator is the second preset exhaust amount.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The preset parameters include: the number of kitchen range hoods, the floor where the kitchen range hoods are located, the cross-sectional dimension of a kitchen public flue, the roughness of the kitchen public flue, the number of bathroom ventilators, the preset air exhaust volume of a bathroom single household, the floor where the bathroom ventilators are located, the cross-sectional dimension of a bathroom exhaust passage, the first preset air exhaust volume and the second preset air exhaust volume;
The calculation formula of the sum of the exhaust quantity of the kitchen range hood and the exhaust quantity of the toilet ventilator is Wherein/>Is the sum of the exhaust air quantity of the kitchen range hood and the exhaust air quantity of the toilet ventilator,/>For the first preset air discharge rate,/>For the number of kitchen range hoods,/>For the second preset air discharge rate,/>The number of ventilators in the toilet.
3. The method of claim 1, wherein adjusting the opening and closing of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing of the toilet flow distribution valve corresponding to the toilet ventilator based on the system power demand point and the preset curve if the system power demand point is located outside the preset curve comprises:
determining a maximum operating frequency of a host corresponding to the system power demand point based on the preset curve so that the host operates at the corresponding maximum operating frequency of the host;
Determining a first target air discharge amount corresponding to the third target air pressure when the host operates at the corresponding maximum operating frequency of the host, and calculating a difference value between the total air discharge amount and the first target air discharge amount;
And adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator based on the difference value and the preset parameter.
4. A method according to claim 3, wherein if the operation time of the kitchen and toilet exhaust system is in a preset time period, adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator based on the difference value and the preset parameter comprises:
The opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to a second preset opening and closing degree, so that the air discharge quantity of the toilet ventilator is the second preset air discharge quantity;
Calculating a second target air discharge rate of the single kitchen user based on the preset air discharge rate of the single kitchen user, the number of the kitchen range hoods and the difference value;
And adjusting the kitchen flow distribution valve corresponding to the kitchen range hood to the opening and closing degree corresponding to the second target air discharge quantity so that the air discharge quantity of the kitchen range hood is the second target air discharge quantity.
5. The method of claim 3, wherein adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator based on the difference and the preset parameter if the operation time of the kitchen range hood is not in the preset time period, comprises:
The opening and closing degree of a kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to a first preset opening and closing degree, so that the air discharge quantity of the kitchen range hood is the first preset air discharge quantity;
calculating a third target air discharge rate of the single bathroom user based on the preset air discharge rate of the single bathroom user, the number of the bathroom ventilators and the difference value;
and adjusting the toilet flow distribution valve corresponding to the toilet ventilator to the opening and closing degree corresponding to the third target air discharge quantity so that the air discharge quantity of the toilet ventilator is the third target air discharge quantity.
6. The method of claim 1, wherein prior to calculating the first target wind pressure for the target kitchen hood and the second target wind pressure for the target toilet ventilator using the preset parameters, the method further comprises:
And controlling the kitchen air volume total control valve and the bathroom air volume total control valve to be opened to a first preset angle, and controlling the target kitchen flow distribution valve and the target bathroom flow distribution valve to be opened to a second preset angle.
7. An air quantity control device of a kitchen and bathroom exhaust system is characterized by comprising: the kitchen ventilator comprises a main machine, a kitchen air volume total control valve, a kitchen flow distribution valve, a kitchen range hood, a bathroom air volume total control valve, a bathroom flow distribution valve, a bathroom ventilator and an induction detector, wherein a kitchen flow distribution valve and a kitchen range hood are arranged in each kitchen;
The host is used for calculating a first target wind pressure of a target kitchen ventilator and a second target wind pressure of the target bathroom ventilator by using preset parameters after a first starting signal sent by the kitchen ventilator in a building to be controlled and a second starting signal sent by the bathroom ventilator are obtained, wherein the target kitchen ventilator is the kitchen ventilator at the lowest layer of the building to be controlled in the kitchen ventilator, the target bathroom ventilator is the bathroom ventilator at the lowest layer of the building to be controlled in the bathroom ventilator, the first target wind pressure is the wind pressure required when the exhaust volume of the target kitchen ventilator is the first preset exhaust volume, and the second target wind pressure is the wind pressure required when the exhaust volume of the target bathroom ventilator is the second preset exhaust volume;
The host is configured to determine a system power demand point based on the first target wind pressure, the second target wind pressure and the preset parameter, where an abscissa of the system power demand point is a third target wind pressure, the third target wind pressure is a larger target wind pressure of the first target wind pressure and the second target wind pressure, an ordinate of the system power demand point is a total air volume, and the total air volume is a sum of an exhaust volume of the kitchen ventilator and an exhaust volume of the toilet ventilator;
The host is used for adjusting the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood and the opening and closing degree of the bathroom flow distribution valve corresponding to the bathroom ventilator based on the system power demand point and a preset curve so as to enable the kitchen range hood and the bathroom ventilator to exhaust air in an equalizing mode, wherein the preset curve is a performance curve between air quantity and air pressure corresponding to the maximum design working frequency of the host;
The host is further configured to determine an actual operating frequency of the host corresponding to the system power demand point based on the preset curve if the system power demand point is located at the inner side of the preset curve; based on the actual running frequency of the host, the opening and closing degree of the kitchen flow distribution valve corresponding to the kitchen range hood is adjusted to the opening and closing degree corresponding to the first preset exhaust amount, and the opening and closing degree of the toilet flow distribution valve corresponding to the toilet ventilator is adjusted to the opening and closing degree corresponding to the second preset exhaust amount, so that the exhaust amount of the kitchen range hood is the first preset exhaust amount, and the exhaust amount of the toilet ventilator is the second preset exhaust amount.
8. The apparatus of claim 7, wherein the device comprises a plurality of sensors,
The main machine is also used for providing power for the kitchen and bathroom exhaust system and purifying the gas in the kitchen and the bathroom.
9. The apparatus of claim 7, wherein the device comprises a plurality of sensors,
The kitchen air volume total control valve is used for controlling the total flow of the kitchen public exhaust passage;
The bathroom air volume total control valve is used for controlling the total flow of the bathroom public exhaust passage.
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| CN114017819A (en) * | 2021-11-04 | 2022-02-08 | 杭州老板电器股份有限公司 | Residential kitchen and bathroom exhaust system control device and method |
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| JP2006038364A (en) * | 2004-07-28 | 2006-02-09 | Max Co Ltd | Ventilating device |
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