CN111623485A - Control method for automatically adjusting air volume of fresh air fan - Google Patents
Control method for automatically adjusting air volume of fresh air fan Download PDFInfo
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- CN111623485A CN111623485A CN202010421419.XA CN202010421419A CN111623485A CN 111623485 A CN111623485 A CN 111623485A CN 202010421419 A CN202010421419 A CN 202010421419A CN 111623485 A CN111623485 A CN 111623485A
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- fresh air
- indoor
- air valve
- opening degree
- air volume
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/70—Carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a control method for automatically adjusting air volume of a fresh air fan. The control method comprises the following steps: s1, detecting the indoor CO2 concentration value P; s2, comparing the detected indoor CO2 concentration value P with a preset threshold value, and judging the range of a threshold value interval in which the CO2 concentration value is positioned; and S3, correspondingly adjusting the opening degree of the fresh air valve by the control unit according to the section range obtained in the step S2, wherein the larger the value of the section range is, the larger the corresponding opening degree of the fresh air valve is. By the control method, the fresh air quantity introduced into the room is automatically adjusted, so that the service life of the filter element is prolonged, and the use cost is reduced.
Description
Technical Field
The invention relates to the technical field of indoor air quality control, in particular to a control method for automatically adjusting air volume of a fresh air fan.
Background
At present, along with the rapid development of cities, the quality of air in the cities continuously slides down, and the new fans are more and more popularized to become common household appliances following air conditioners. After being filtered by the filter element of the fresh air fan, the outdoor air becomes clean fresh air and is sent into a room, so that the indoor air quality is effectively improved. However, if the introduced fresh air volume is not regulated and controlled and is always operated at the maximum air volume, two negative effects are caused. On one hand, the filter element of the new fan needs to be replaced quickly, the cost is high, the delay replacement is not feasible, and the filter element can become a pollution source of air during the period, so that the indoor air quality is poor. On the other hand, too much fresh air is introduced into the room, which brings great burden to the indoor air conditioner, not only does not save energy, but also cannot ensure the proper temperature and humidity of the indoor environment.
Disclosure of Invention
In view of the above, the present invention provides a new control method for automatically adjusting the air volume of a new air blower to solve the above problems.
The invention provides a control method for automatically adjusting air volume of a fresh air fan, wherein the fresh air fan comprises a fresh air duct for air inlet and a return air duct for return air, a fresh air valve for adjusting the fresh air volume is arranged at the position of the fresh air duct, the fresh air fan also comprises a control unit for controlling the opening degree of the fresh air valve, and the control method comprises the following steps:
s1, detecting the indoor CO2 concentration value P;
s2, comparing the detected indoor CO2 concentration value P with a preset threshold value, and judging the range of a threshold value interval in which the CO2 concentration value is positioned;
and S3, correspondingly adjusting the opening degree of the fresh air valve by the control unit according to the section range obtained in the step S2, wherein the larger the value of the section range is, the larger the corresponding opening degree of the fresh air valve is.
In one embodiment, the control unit stores the preset threshold in advance, the number of the preset threshold is n, where n is a positive integer, the preset threshold includes P1, P2, …, and Pn in sequence from small to large, the preset threshold divides n +1 of the interval ranges, and the opening degree of the fresh air valve is matched with K1, K2, … Kn, Kn +1 in sequence from small to large corresponding to each of the interval ranges, where Kn +1 corresponds to 100% of the opening degree of the fresh air valve.
In one embodiment, if the indoor CO2 concentration value P is in the range of (0, P1], the control unit adjusts the opening degree of the fresh air valve to be K1;
if the indoor CO2 concentration value P is at (P1, P2), the control unit adjusts the opening degree of the fresh air valve to be K2;
by analogy, if the indoor CO2 concentration value P is (Pn-1, Pn), the control unit adjusts the opening of the fresh air valve to Kn;
and if the indoor CO2 concentration value is larger than the maximum preset threshold Pn, the control unit adjusts the opening of the fresh air valve to 100%.
In one embodiment, the number n of the preset thresholds is equal to 3.
In one embodiment, a CO2 concentration sensor is arranged in the return air duct and is used for detecting the indoor CO2 concentration value P in real time.
In one embodiment, the new air blower further includes a selection module for an automatic air volume adjusting mode and a manual air volume adjusting mode, before step S1 is executed, the new air blower first identifies the air volume adjusting mode selected to enter, and if the new air blower selects the automatic air volume adjusting mode, the step of starting the control method for automatically adjusting the air volume is started.
In one embodiment, the fresh air valve is an electric fresh air valve.
In one embodiment, the fresh air machine further comprises a filter element for filtering fresh air entering from the fresh air pipe.
In one embodiment, the new fan is provided with an air valve, a motor is arranged in the air valve, the output end of the motor is connected with a blade, and the blade is driven by the motor to rotate. The air valve is provided with a plurality of blades which are connected through a connecting rod device, one blade is connected with the output end of the motor, the moving blade is driven by the motor to rotate, and the rotation of the plurality of blades is realized through the linkage of the connecting rod device. Starting from the condition that the air valve is completely closed, the blades are perpendicular to the air flow direction, the angle of each blade is 0 degree at the moment, after the controller receives a signal, the motor controls one blade in the air valve connected with the motor to rotate by a certain angle, all other blades are driven to synchronously rotate by the same angle through the connecting rod device 109, and therefore the air valve is changed from a completely closed state to a state of opening a certain ventilation area.
Advantageous effects
According to the control method for automatically adjusting the air volume of the fresh air fan, manual operation is not needed, the fresh air volume introduced into a room can be automatically adjusted according to the preset program of the control unit, the total air volume of the fresh air fan is unchanged in the whole adjusting process, normal indoor air flow circulation is maintained, and meanwhile, on the premise of ensuring the indoor air quality, energy is saved, the service life of a filter element is prolonged, and the use cost is reduced.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 is a functional schematic according to an embodiment of the present invention.
Fig. 2 and 3 are schematic structural views of a new fan according to an embodiment of the invention
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, procedures, components, and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
FIG. 1 is a functional schematic according to an embodiment of the present invention. As shown in fig. 1, the fresh air machine 1 includes a main body 4, a fan set 3 and a filter element 7 for filtering air, the fresh air machine is arranged in the main body 4, the fresh air machine further includes a fresh air pipe 3, a return air pipe 2 and an air supply outlet (not shown) connected with the main body 4, and a fresh air valve 5 for adjusting fresh air volume is arranged in the fresh air pipe 3.
The fresh air machine 1 further comprises a control unit, a fresh air volume adjusting algorithm is stored in the control unit in advance, and the control unit can adjust the fresh air volume according to the collected indoor CO2And (4) calculating the opening degree of the matched fresh air valve 5 through a fresh air volume adjusting algorithm, and sending a control signal to adjust the fresh air valve 5 to the corresponding opening degree. In this embodiment, the fresh air valve 5 is an electric fresh air valve, and the control unit automatically controls the opening of the fresh air valve 5 through an electric signal.
Indoor CO2Under the lower condition of concentration value, adjust fresh air valve 5's aperture less for the fresh air intake is lower level, and the air volume that externally introduces like this reduces, thereby reduces filter core 7's burden, prolongs filter core 7's life, has still reduced the influence of outside air to indoor environment simultaneously, further reduces indoor air conditioner's burden. When indoor CO is monitored2The concentration value is at a higher level, the opening degree of the fresh air valve 5 is automatically increased, the fresh air inlet volume is enlarged, and the quality of indoor air is kept.
The control method for automatically adjusting the air volume of the fresh air fan provided by the embodiment comprises the following steps:
s1 detection of indoor CO2The concentration value P.
The new fan 1 also comprises CO arranged in the return air duct 22 Concentration transmitterSensor 6 for real-time detection of indoor CO2The concentration value P and transmits it to the control unit.
S2, detecting the indoor CO2Comparing the concentration value P with a preset threshold value, and judging CO2The range of the interval in which the concentration value P is located.
The control unit is prestored with preset threshold values, the number of the preset threshold values is n, wherein n is a positive integer, the preset threshold values sequentially comprise P1, P2, … and Pn from small to large, and n +1 interval ranges are divided by the preset threshold values. Corresponding to each interval range, different control signals can be calculated by a fresh air volume adjusting algorithm of the control unit. The control unit controls the air volume adjustment of the fresh air machine according to the control signal.
And S3, correspondingly adjusting the opening degree of the fresh air valve 5 according to the section range obtained in the step S2, wherein the larger the value of the section range is, the larger the opening degree of the fresh air valve 5 is.
And the control unit adjusts the algorithm according to the pre-stored fresh air volume, which can be expressed as K ═ f (P), where P is the detected indoor CO2And the concentration value K is a control signal of the corresponding fresh air valve 5, and f represents a functional relation. In the invention, n preset thresholds P1, P2, … and Pn are used for dividing n +1 interval ranges, the opening degree of the fresh air valve 5 is sequentially set to be K1, K2, … Kn and Kn +1 from small to large corresponding to each interval range, each interval range corresponds to the opening degree of a specific fresh air valve 5, and the opening degree of the fresh air valve 5 corresponding to Kn +1 is 100%. In particular, if detected indoor CO2The concentration value P is at (0, P1)]In the interval range, the opening degree of the fresh air valve 5 is adjusted to be the lowest opening degree K1; if detected indoor CO2The concentration value is at (P1, P2)]Adjusting the opening of the fresh air valve 5 to be K2; analogizing in turn, if the indoor CO is detected2The concentration value P is at (Pn-1, Pn)]Then, the opening degree of the fresh air valve 5 is adjusted to Kn, and if indoor CO is detected2If the concentration value P is greater than the maximum preset threshold value Pn, the opening Kn +1 of the fresh air valve 5 is adjusted, that is, the opening of the fresh air valve 5 is 100%. It is understood that the end points P1, P2, …, Pn of the above-mentioned interval ranges can be classified as belonging to another adjacent one of the intervals, i.e. must be the end points of one of the adjacent intervals.
In this embodiment, the number of the preset thresholds n is 3, and the preset thresholds P1, P2, P3 and 3 are divided into 4 ranges from small to large, where each range is 0<P<＝P1,P1<P<＝P2,P2<P<＝P3,P>P3. If the indoor CO2 concentration value P falls into (0, P1)]The interval range is that the corresponding opening degree of the fresh air valve 5 is K1 when the indoor CO is in2The concentration value P is (P1, P2)]In the range, the opening degree of the fresh air valve 5 is K2, and when the indoor CO is in the range of2The concentration value P is (P2, P3)]The corresponding opening degree of the fresh air valve 5 is K3 when P is>P3, the opening degree of the fresh air valve 5 is K4. The opening K1, K2, K3 and K4 are sequentially increased from small to large, and the opening K4 corresponds to 100 percent, namely the fresh air valve 5 is fully opened.
In one embodiment, the new air blower 1 further includes a selection module for an automatic air volume adjusting mode and a manual air volume adjusting mode, before executing step S1, the new air blower 1 first identifies the air volume adjusting mode selected to enter, and if the new air blower 1 collects that the user selects the automatic air volume adjusting mode, the control method for automatically adjusting the air volume is started, that is, S1, S2, and S3.
In this embodiment, the indoor CO is monitored in real time2The opening degree of a fresh air valve 5 in the fresh air pipeline is adjusted according to the concentration value, so that the air volume is adjusted, and the indoor CO can be real-time2The concentration timely adjusts the opening of the fresh air valve 5, and changes the fresh air volume entering the room.
In the control method for automatically adjusting the air volume of the fresh air fan 1 provided by this embodiment, a CO is added to the return air duct2 A concentration sensor 6, an electric fresh air valve is added on the fresh air pipeline, and indoor CO is monitored in real time2The opening degree of a fresh air valve 5 in the fresh air pipeline is adjusted according to the concentration value P, so that the air volume is adjusted, and the real-time indoor CO can be used2The opening degree of the fresh air valve 5 is adjusted in time according to the concentration, the fresh air quantity entering the room is changed, manual operation is not needed, the fresh air quantity introduced into the room can be automatically adjusted according to a preset program, the total air quantity of the fresh air fan 1 is unchanged, normal indoor airflow circulation is maintained, the indoor air quality is guaranteed, energy is saved, and the service life of the filter element 7 is prolongedThe load on the indoor air conditioner is reduced, and the use cost is reduced.
Fig. 2 and fig. 3 are schematic structural views of a fresh air machine according to an embodiment. This new fan 100, include, body 101, the configuration of body 101 one side is used for the new trend tuber pipe 104 of air inlet and is used for the return air tuber pipe 103 of return air, supply-air outlet 102, its configuration body 101 one side relative with new trend tuber pipe 104, new trend tuber pipe 104 side in the body 101 is equipped with the new trend valve 106 that is used for adjusting the new amount of wind, control module 108, its configuration is in one side of new trend valve 106 in the body 101, control module 108 electric connection new trend valve 106, the aperture based on new trend valve 106 of command control module 108 control. The new blower is provided with a blower 105, which is arranged on the side close to the air supply opening 102 in the main body 101, and the blower 105 is electrically connected with the control module 108. This new fan, dispose the blade 107 of blast gate and the link means 109 between the blast gate blade, from under the blast gate complete closure's the condition, blade 107 is perpendicular with the air current direction, can regard the blade angle this moment to be 0 at this moment, after the controller received the signal, the motor control was rather than one in the blast gate that is connected blade 107 rotatory certain angle, drive all other blades synchronous rotation same angle through link means 109 like this, the state that the blast gate just changed from the complete closure into the state of having opened certain ventilation area like this. The larger the rotation angle is, the larger the ventilation area of the air valve is opened. When the rotation angle reaches 90 degrees, the direction of the blades is consistent with the direction of the airflow, namely the state that the air valve is completely opened. In the present embodiment, a motor is disposed in the damper, and the output end of the motor is connected to one of the blades 107. Based on the driving of the motor to realize the rotation of the blades.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (8)
1. The control method for automatically adjusting the air volume of the new fan is characterized in that a new air valve for adjusting the new air volume is arranged at the position of the new air duct, the new fan further comprises a control unit for controlling the opening degree of the new air valve, and the control method comprises the following steps:
s1 detection of indoor CO2A concentration value P;
s2, detecting the indoor CO2Comparing the concentration value P with a preset threshold value, and judging the CO2The range of the threshold interval where the concentration value is located;
and S3, correspondingly adjusting the opening degree of the fresh air valve by the control unit according to the section range obtained in the step S2, wherein the larger the value of the section range is, the larger the corresponding opening degree of the fresh air valve is.
2. The method as claimed in claim 1, wherein the control unit stores the preset threshold in advance, the number of the preset threshold is n, where n is a positive integer, the preset threshold includes P1, P2, …, and Pn from small to large, the preset threshold divides n +1 of the interval ranges, and the opening degree of the fresh air valve is matched with K1, K2, … Kn, Kn +1 from small to large in sequence corresponding to each of the interval ranges, where Kn +1 corresponds to 100% of the opening degree of the fresh air valve.
3. The control method for automatically adjusting the air volume of the fresh air fan according to claim 2, characterized in that,
if the indoor CO is2The concentration value P is at (0, P1)]The control unit adjusts the opening degree of the fresh air valve to be K1;
if the indoor CO is2The concentration value P is (P1, P2)]The control unit adjusts the opening degree of the fresh air valve to be K2;
and so on, if the indoor CO is2The concentration value P is at (Pn-1, Pn)]The control unit adjusts the opening degree of the fresh air valve to be Kn;
if the indoor CO is2The value of concentration being greater than maximumAnd setting a threshold Pn, and adjusting the opening of the fresh air valve to 100% by the control unit.
4. The control method for automatically adjusting the air volume of the fresh air fan as claimed in claim 3, wherein the number n of the preset threshold values is equal to 3.
5. The method for controlling the automatic air volume regulation of the fresh air fan as claimed in claim 1, wherein a CO is arranged in the return air duct2A concentration sensor for detecting the indoor CO in real time2The concentration value P.
6. The method as claimed in claim 1, wherein the new blower further includes a selection module for an automatic air volume adjusting mode and a manual air volume adjusting mode, before executing step S1, the new blower first identifies the air volume adjusting mode selected to enter, and if the new blower selects the automatic air volume adjusting mode, the method starts the step of automatically adjusting the air volume.
7. The control method for automatically adjusting the air volume of the fresh air fan as claimed in claim 1, wherein the fresh air valve is an electric fresh air valve.
8. The control method for automatically adjusting the air volume of the fresh air fan as claimed in claim 1, wherein the fresh air fan further comprises a filter element for filtering fresh air entering from the fresh air duct.
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| CN202010421419.XA CN111623485A (en) | 2020-07-07 | 2020-07-07 | Control method for automatically adjusting air volume of fresh air fan |
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| CN202010421419.XA CN111623485A (en) | 2020-07-07 | 2020-07-07 | Control method for automatically adjusting air volume of fresh air fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944957A (en) * | 2021-10-28 | 2022-01-18 | 青岛海尔空调器有限总公司 | Air conditioning system, control method and device thereof, and computer-readable storage medium |
| CN114440417A (en) * | 2021-12-17 | 2022-05-06 | 湖南东方红建设集团有限公司 | Fresh air fan control method and system and storage medium |
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| CN110006143A (en) * | 2019-03-26 | 2019-07-12 | 深圳达实智能股份有限公司 | A kind of indoor fresh air control method and device based on access control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113944957A (en) * | 2021-10-28 | 2022-01-18 | 青岛海尔空调器有限总公司 | Air conditioning system, control method and device thereof, and computer-readable storage medium |
| CN114440417A (en) * | 2021-12-17 | 2022-05-06 | 湖南东方红建设集团有限公司 | Fresh air fan control method and system and storage medium |
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