CN113310185A - Intelligent air supplementing method of fresh air ventilation system and fresh air ventilation system - Google Patents
Intelligent air supplementing method of fresh air ventilation system and fresh air ventilation system Download PDFInfo
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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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
- F24F2110/40—Pressure, e.g. wind pressure
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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
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Abstract
The invention discloses an intelligent air supplementing method of a fresh air ventilating system and the fresh air ventilating system, wherein the intelligent air supplementing method comprises the following steps of S1, acquiring indoor air quality parameters, and comparing the indoor air quality parameters with set parameters; s2, starting an exhaust program to exhaust air from the indoor to the outside; and S3, detecting the pressure in the chamber, controlling the air inlet valve to open when the pressure in the chamber is reduced to a first set value, and intermittently changing the pressure in the chamber to lift the pressure in the chamber in a stage. When the indoor air quality is detected to be not up to the standard, the exhaust program is started, so that the indoor air quality can be ensured; indoor air discharge is to indoor ventilation again when certain degree, replaces limit exhaust limit tonifying qi, on the one hand can be as much as possible with indoor air discharge of treating the change for the speed of taking a breath, improves the efficiency of taking a breath, and the indoor pressure of intermittent type change makes indoor internal energy keep a period of time under specific pressure in addition, replaces indoor pressure to progressively improve, has further improved the efficiency of taking a breath.
Description
Technical Field
The invention belongs to the field of household appliances, and particularly relates to an intelligent air supplementing method of a fresh air ventilating system and the fresh air ventilating system.
Background
At present, with the rapid development of society and the rapid improvement of people's living standard, healthy, energy-saving, simple, reliable fresh air ventilation system and fresh air equipment have become the focus of common attention of buildings, air conditioner designs and users, and fresh air ventilators are born in response to the requirements. The fresh air ventilator is used for replacing indoor air, and the indoor air can be kept fresh. However, the ventilation mode is generally to control the opening angle of the unpowered valve by using the pressure difference formed between the indoor and outdoor after the air is exhausted to control the air intake rate, or to control the on/off of the air by fully opening and fully closing the electrically operated valve, and to make the air supply while exhausting all the time, so that the situation that the air just entering the room is immediately exhausted by the fan is serious, the air exchange efficiency is low, and the energy is wasted.
In addition, a complete fresh air ventilator system has a high value, namely thousands of yuan for a few and ten thousand yuan for a large number, is complex to install and can be popularized and used by far-reaching common people. However, the range hood becomes a necessary product for the existing families, the popularization rate is very high, and the existing open kitchen with a building structure is very common, so that the range hood can be considered to replace a power device, namely a fan, of the existing fresh air ventilation system to exhaust indoor air to the outdoor.
Chinese patent with application number CN201510968914.1 discloses a pressure-adjustable purification and ventilation system of CIT, including air supply arrangement, exhaust device, a frequency converter, differential pressure sensor, in the course of the work, under the effect of forced draught blower, the new trend is in proper order through the primary filter, the room is got into from the new trend entry after the tertiary filtration of middle efficiency filter and high efficiency filter, differential pressure sensor detects the pressure in the room, opening angle is adjusted according to this testing result to first blast gate, and the rotational speed is adjusted to the forced draught blower, thereby the amount of wind in the room is introduced in the change, with the pressure in adjusting the room, dirty new trend in the room is regularly discharged under the effect of exhaust fan, thereby guarantee new trend quality and pressure in the room.
Although the CIT pressure-adjustable purification ventilation system in the scheme can detect the pressure in a room according to the pressure difference sensor, the first air valve adjusts the opening angle according to the detection result, and the air feeder adjusts the rotating speed, the aim is to change the air volume introduced into the room, provide proper pressure for a user, and not improve the indoor air exchange efficiency, so that the effect of improving the air exchange efficiency cannot be achieved, and the energy consumption can not be saved; in addition, since the above-described scheme does not include a device for detecting air quality, it is impossible to determine whether to ventilate the room based on the indoor air quality.
The present invention has been made in view of the above technical drawbacks.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide an intelligent air supplementing method of a fresh air ventilation system, which can detect the air quality and judge whether ventilation is needed according to the indoor air quality, can improve the replacement efficiency of the indoor air, saves energy, and can prevent overlarge noise generated by air exhaust.
In order to solve the technical problems, the invention adopts the technical scheme that:
an intelligent air supplementing method for a fresh air ventilation system, wherein the fresh air ventilation system comprises an air inlet valve, the intelligent air supplementing method comprises the steps of,
s1, acquiring indoor air quality parameters, and comparing the indoor air quality parameters with set parameters;
s2, starting an exhaust program to exhaust air from the indoor to the outside;
and S3, detecting the pressure in the chamber, controlling the air inlet valve to open when the pressure in the chamber is reduced to a first set value, and intermittently changing the pressure in the chamber to lift the pressure in the chamber in a stage.
By adopting the scheme, when the indoor air quality is detected not to reach the standard, the exhaust program is started, and the indoor air quality is ensured. When indoor air discharge certain degree, open the admission valve again and ventilate to indoor, replace limit exhaust limit tonifying qi, on the one hand can be as much as possible with indoor air discharge of treating the change for the speed of taking a breath, improve the efficiency of taking a breath, on the other hand can prevent that indoor pressure from crossing lowly, influence user's health, moreover, can also prevent that indoor pressure from crossing the difficulty of airing exhaust that leads to excessively, and then need increase the noise that the power of airing exhaust leads to too big. In addition, the pressure in the chamber is changed intermittently, so that the pressure in the chamber can be kept for a period of time under the specific pressure instead of gradually increasing the pressure in the chamber, and the ventilation efficiency is further improved.
Further, in step S1, the indoor air quality parameter is acquired, and after comparing with the set parameter, it is determined that the indoor air quality does not meet the standard, a signal prompting the start of the exhaust process is sent.
Through adopting above-mentioned scheme, when detecting that indoor air quality does not reach standard, send the effect that prompt signal can play whether need taking a breath to the user affirmation, can prevent directly not taking a breath unnecessary energy consumption brought indoor under the people's the condition temporarily at home.
Further, the number of times and/or time of sending the signal prompting the start of the exhaust program is detected to reach a set value, and the exhaust program is started.
By adopting the scheme, the situation that the user forgets to confirm the starting of the exhaust program, so that the indoor ventilation cannot be normally carried out and the health of the user is influenced can be prevented.
Further, in step S3, the step of raising the pressure in the chamber includes,
setting at least two pressure set values for maintaining stable pressure, maintaining the pressure for a set time when detecting that the indoor pressure reaches a first pressure set value, then increasing the indoor pressure to a second pressure set value, and maintaining the pressure for another set time;
repeating the steps until the pressure in the chamber rises to a second set value;
the first set value is smaller than or equal to the first pressure set value and smaller than or equal to the second pressure set value.
Through adopting above-mentioned scheme, can reach the purpose that improves the efficiency of taking a breath, can guarantee again that indoor pressure stage promotes.
Further, in the step S3, after the indoor pressure rises to the second set value, there is also step S4 of obtaining an indoor air quality parameter, comparing the indoor air quality parameter with the set parameter, determining whether the set parameter is reached, if yes, stopping air intake and exhaust, otherwise, closing the air intake valve, stopping air intake, continuing to execute the exhaust procedure in the step S2 and the steps S3 and S4 until the indoor air quality parameter reaches the set parameter, and stopping air intake and exhaust.
By adopting the scheme, the indoor air quality can be ensured to meet the requirement, and the indoor air quality is ensured.
Further, in step S3, the method for maintaining the indoor pressure includes instantaneously controlling the opening angle and/or the exhaust power of the intake valve so that the intake air amount and the exhaust air amount per unit time become equal to each other, and maintaining the state.
By adopting the scheme, the opening or the increasing of the opening angle of the air inlet valve is controlled after the indoor pressure reaches the set value, if the opening or the increasing of the opening angle of the air inlet valve is possibly a process which changes gradually, the indoor pressure can be changed in the process, and the effect of maintaining the pressure can be achieved only by controlling the opening angle and/or the exhaust power of the air inlet valve instantly to enable the air inflow and the exhaust volume in unit time to be equal.
Further, in step S3, after the air intake valve is opened, there is a step of performing purification to purify the fresh air to be introduced into the room.
Through adopting above-mentioned scheme, carry out purification treatment to letting in indoor new trend, guarantee to get into the quality of indoor new trend, be favorable to user's physical and mental health.
And further, the step of executing purification comprises the steps of detecting the air quality parameter of the purified fresh air, comparing the air quality parameter with the set parameter, judging whether the air quality parameter reaches the set parameter, if so, executing the next step, and if not, continuing to execute purification until the air quality parameter of the purified fresh air reaches the set parameter.
Further, there is a step of adjusting the temperature of the purified fresh air after performing the purification;
the adjusting of the temperature of the purified fresh air comprises the steps of,
detecting the temperature of the purified fresh air;
if the temperature of the purified fresh air is judged to be lower than a first preset value T1, heating the purified fresh air;
if the temperature of the purified fresh air is judged to be higher than a second preset value T2, cooling the purified fresh air;
otherwise, directly introducing the purified fresh air into the room;
the T1 < T2.
By adopting the above scheme, the new trend after purifying heats or cooling treatment, enables indoor temperature to keep in certain extent, guarantees that the temperature of new trend accords with the temperature of user's demand. In addition, the temperature adjusting unit heats or cools the purified fresh air, so that unnecessary heating or cooling can be avoided, the heating or cooling efficiency can be improved, and energy can be saved.
Another objective of the present invention is to provide a fresh air ventilation system, which comprises an air intake valve, a range hood for providing an exhaust device, a pressure detection device, an air quality detection device and a central control unit;
the central control unit comprises a central control unit which comprises,
the first signal receiving module is used for receiving indoor air quality parameter information detected by the air quality detection device;
the second signal receiving module is used for receiving the indoor pressure parameter information detected by the pressure detection device;
the judging module is at least used for judging the time for starting the exhaust device according to the received indoor air quality parameter information and judging the time for opening the air inlet valve according to the received pressure parameter information;
the first signal sending module is used for sending an exhaust signal to an exhaust device;
and the second signal sending module is used for sending the opening time of the air inlet valve to the air inlet valve.
By adopting the above scheme, the exhaust device of the range hood is used as the exhaust device of the fresh air ventilation system, so that the fresh air to be replaced can be exhausted, the oil smoke in a kitchen can be extracted when a user cooks, the function of the common range hood is exerted, the indoor air can be exhausted when the indoor air needs to be replaced, new fresh air is supplemented through the air inlet device, and the indoor air is replaced. In addition, the pressure detection device can detect indoor pressure, the central control unit determines the exhaust action of the air inlet valve and the range hood according to the indoor pressure condition, the air quality detection device can detect indoor air quality, the air quality detection device is matched with the air inlet valve, the range hood and each module of the central control unit to achieve the purpose of automatically replacing the indoor air, and the indoor air quality is guaranteed.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. When the indoor air quality is detected not to reach the standard, an exhaust program is opened, indoor ventilation is realized, and the indoor air quality is ensured. When indoor exhaust falls to first setting value to pressure, open the admission valve again and ventilate to indoor, replace limit exhaust limit tonifying qi, on the one hand can be as much as possible with indoor air discharge of treating the change for the speed of taking a breath, improve the efficiency of taking a breath, on the other hand can prevent that indoor pressure from crossing lowly, influencing user's health, moreover, can prevent that indoor pressure from crossing the difficulty of airing exhaust that leads to excessively, and then need increase the noise that the power of airing exhaust leads to too big. In addition, the pressure in the chamber is changed intermittently, so that the pressure in the chamber can be kept for a period of time under the specific pressure instead of gradually increasing the pressure in the chamber, and the ventilation efficiency is further improved.
2. When the indoor air quality is detected to be not up to the standard, the prompting signal is sent to play a role in confirming whether ventilation is needed or not to the user, unnecessary energy consumption caused by direct indoor ventilation under the condition that people are not living temporarily at home can be prevented, the frequency and/or time for detecting and sending the signal for prompting starting of the exhaust program reaches a set value, the exhaust program is started, and the situation that the user forgets to confirm starting of the exhaust program, so that the indoor ventilation cannot be normally confirmed and the health of the user is influenced can be prevented.
3. The air quality of the indoor fresh air and/or the purified fresh air is detected, and air intake and exhaust are stopped after the indoor air quality reaches the standard, so that the indoor air quality can be ensured, and the health of a user is facilitated.
4. The air inflow and the air discharge in unit time are equal by controlling the opening angle and/or the air discharge power of the air inlet valve, and the indoor pressure can be ensured to be stable.
5. The fresh air introduced into the room is purified, so that the quality of the fresh air entering the room is ensured, the physical and mental health of a user is facilitated, the purified fresh air is heated or cooled, the temperature of the fresh air entering the room is ensured to meet the temperature required by the user, and the situation that the temperature in the room is greatly increased or decreased due to the overlarge temperature difference between the fresh air entering the room and the temperature in the room is prevented; in addition, the fresh air introduced into the room is purified, so that unnecessary heating or cooling can be avoided, the heating or cooling efficiency can be improved, and energy can be saved.
6. The range hood is used as an exhaust device of the fresh air ventilation system, air to be replaced can be exhausted, oil smoke in a kitchen can be pumped and exhausted when a user cooks, the function of the common range hood is exerted, air in a corresponding indoor space can be exhausted when the air in other areas except the kitchen or in a room needs to be replaced, new fresh air is supplemented through the air inlet device, and indoor air is replaced. In addition, the air quality detection device can detect the indoor air quality and is matched with the range hood and the central control unit to achieve the purpose of automatically discharging the indoor air, the pressure detection device can detect the indoor pressure, and the central control unit determines the exhaust actions of the air inlet valve and the range hood according to the indoor pressure condition, so that the intelligence of the fresh air ventilation system is realized.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic flow chart of an intelligent air supplement method of a fresh air ventilation system according to the present invention;
fig. 2 is a schematic flow chart of an intelligent air supplement method of a fresh air ventilation system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of an intelligent air supplement method for a fresh air ventilation system according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of the fresh air ventilating system of the present invention.
In the figure: 1. a central control unit; 2. a range hood; 21. an exhaust device; 22. a panel of a range hood; 23. a purification and circulation device; 3. an air intake device; 31. an air intake unit; 32. an intake valve; 4. a pressure detection device; 5. a fresh air processing device; 51. a purification unit; 52. a temperature adjusting unit; 6. a temperature detection device; 7. a control module; 71. a terminal control unit; 711. a mobile terminal; 712. a control panel; 8. air quality detection device.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
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 will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the intelligent air supplement method for a fresh air ventilation system of the present invention includes an air intake valve, the intelligent air supplement method includes steps,
s1, acquiring indoor air quality parameters, and comparing the indoor air quality parameters with set parameters;
s2, starting an exhaust program to exhaust air from the indoor to the outside;
and S3, detecting the pressure in the chamber, controlling the air inlet valve to open when the pressure in the chamber is reduced to a first set value, and intermittently changing the pressure in the chamber to lift the pressure in the chamber in a stage.
The air quality parameter obtained in step S1 includes O2Content and concentration, CO2Concentration, PM2.5 concentration, Ammonia concentration, TVOC concentration and H2S concentration, etc. O is2The content and concentration are lower than the minimum set value, and/or CO2At least one of the concentration, PM2.5 concentration, ammonia concentration, TVOC concentration, H2S concentration and the like is higher than the highest set value, namely the air quality does not reach the standard; o2 content and concentration are not lower than the highest set value, and CO2 concentration, PM2.5 concentration, ammonia concentration, TVOC concentration and H concentration2S concentration and the like are not higher than the lowestThe constant value meets the requirement of no ventilation.
The air quality parameter is obtained in step S1 by monitoring the indoor air quality in real time, or monitoring the indoor air quality at a set time point or at set time intervals.
As an embodiment, as shown in fig. 2, after the indoor air quality parameter is acquired and compared with the set parameter in step S1, step S10 is further included to determine that the indoor air quality does not meet the standard, and a signal is sent to prompt the start of the exhaust process.
The control mode of the fresh air ventilation system comprises mobile terminal control and panel control, and the feedback signals received by the fresh air ventilation system comprise remote signals sent by the mobile terminal and signals sent by the panel.
The alert signal may be in the form of a voice alert or an alert tone. When the indoor air quality is detected to be not up to the standard, the prompting signal is sent to play a role in confirming whether air exchange is needed or not to a user, and unnecessary energy consumption caused by direct indoor air exchange of the fresh air exchange system under the condition that people are not living at home temporarily can be prevented.
As shown in fig. 2, after the step S10, there is a step S100 of detecting that the number and/or time of sending the signal for prompting the start of the exhaust routine reaches a set value, and starting the exhaust routine, or receiving the signal for starting the exhaust routine, and starting the exhaust routine. The scheme can prevent the user from forgetting to confirm the starting of the exhaust program, so that the indoor ventilation cannot be normally carried out, and the health of the user is influenced.
The reminding mode can be that the reminding mode sends out a reminding signal at intervals, the interval time can be set to 10S, 30S, 50S and the like, the reminding frequency is n, the specific frequency can be set to 3 times, 5 times and the like, and a user can also set the interval time and the reminding frequency according to the needs of the user. The form of the cue signal is not limited to the above-described cue manner.
In step S3, when the indoor pressure drops to the first set value P1, the indoor and outdoor pressure difference reaches the set value Pa, and the fresh outdoor air enters the room from the outdoor space under the set pressure difference Pa.
In step S3, the pressure in the chamber is intermittently changed by opening the intake valve when the pressure in the chamber drops to the first set value P1, adjusting the gas velocity until the pressure in the chamber reaches the set pressure P01 and the amount of intake air and exhaust gas per unit time are equal, and maintaining the pressure in the chamber at the set pressure P01 for a set time t 01; then increasing the opening angle of the air inlet valve, detecting the indoor pressure, adjusting the air speed until the indoor pressure reaches a set pressure P02 when the indoor pressure is increased to Pa1, keeping the air inlet amount and the air outlet amount equal in unit time, and maintaining the indoor pressure at the set pressure P02 for a set time t02 under the state; then increasing the opening angle of the air inlet valve, detecting the indoor pressure, adjusting the air speed until the indoor pressure reaches a set pressure P03 when the indoor pressure is increased to Pa2, keeping the air inlet speed and the air exhaust speed in the state equal, and maintaining the indoor pressure at the set pressure P03 for a set time t 03; and so on until the pressure in the chamber rises to P2.
Alternatively, as shown in fig. 2, the step S3 of increasing the pressure in the chamber may include,
setting at least two pressure set values for maintaining the pressure to be stable, maintaining the pressure for a set time t11 when the pressure in the chamber reaches a first pressure set value P11, increasing the pressure in the chamber to a second pressure set value P12, and maintaining the pressure for another set time t 12; repeating the steps until the pressure in the chamber rises to a second set value P2; the P1 ≦ P11 < P12 ≦ P2, i.e., the pressure set point includes the first set point P1.
The manner of increasing the indoor pressure in step S3 includes controlling to gradually increase the opening angle of the intake valve according to the trend of the indoor pressure stage and the indoor pressure value.
As an embodiment, the pressure in the chamber is increased by adjusting only the opening angle of the intake valve; the opening angle of the air inlet valve is adjusted in the process of indoor pressure rise, so that the air intake quantity in unit time is larger than the air displacement, and the opening angle and/or the air exhaust power of the air inlet valve are/is reduced at the moment when the indoor pressure rises to the set pressure, so that the air intake quantity is equal to the air displacement.
The method for adjusting the opening angle of the intake valve in the process of indoor boosting to make the intake air amount in unit time greater than the exhaust air amount comprises the steps of gradually increasing the opening angle of the intake valve to a target value ai to make the intake air amount in unit time greater than the exhaust air amount; the fresh air ventilation system controls the air inlet valve to be opened to the target value ai instantaneously according to the indoor and outdoor pressure difference, the outdoor air speed and other data.
As one embodiment, said P1 ═ P11, P12 < P2, said step S3 comprises the steps of,
s31, when the pressure in the chamber drops to the first set value P1, the pressure in the chamber is maintained to be P1, and the set time t11 is set;
s32, after the indoor pressure is maintained to be P1 and the set time t11, increasing the opening angle of the air inlet valve, detecting the indoor pressure, and when the indoor pressure is increased to a second pressure set value P12, maintaining the indoor pressure to be P12 and the set time t 12;
s33, and so on, until the pressure in the chamber rises to the second set point P2.
The t11 and t12 are the same or different in time.
In one embodiment, t11 is not less than t12, and since the indoor air quality is poor in the early stage of ventilation, the indoor space is maintained long in a state where the indoor-outdoor pressure difference is large, and it is convenient to discharge as much dirty air in the indoor space as possible.
The intelligent air supplementing method of the fresh air ventilation system can achieve the purpose of improving the ventilation efficiency and ensure that the indoor pressure is gradually increased.
As shown in fig. 2, after the indoor pressure is increased to the second set value P2 in step S3, step S4 is further included, the indoor air quality parameter is obtained, the indoor air quality parameter is compared with the set parameter, whether the set parameter is reached is judged, if yes, the air intake and the air exhaust are stopped, otherwise, the air intake valve is closed, the air intake is stopped, the exhaust process in step S2 and steps S3 and S4 are continuously executed until the indoor air quality parameter reaches the set parameter, and the air intake and the air exhaust are stopped.
The indoor air quality parameter reaching the set parameter indicates that O2The content and the concentration are not lower than the highest set value; CO22Concentration, PM2.5 concentration, Ammonia concentrationTVOC concentration and H2The concentration of S and the like are not higher than the lowest set value.
In step S3, the method for maintaining the indoor pressure includes instantaneously controlling the opening angle and/or the exhaust power of the intake valve so that the intake air amount and the exhaust air amount per unit time become equal to each other, and maintaining the state.
As an embodiment, the exhaust power is kept constant and only the opening angle of the inlet valve is controlled. Specifically, the fresh air ventilation system controls the opening angle of the air inlet valve according to indoor and outdoor pressure difference, outdoor wind speed, exhaust rate and other data, so that the air inlet valve is opened instantly to enable the air inflow and the exhaust amount in unit time to be equal.
When the indoor pressure is increased to the set pressure, the state that the air inflow and the air discharge in unit time are equal is kept, the indoor pressure can be ensured to reach and keep the set value, the overlarge exhaust power and the overlarge noise caused by the fact that the air inflow and the air discharge in unit time are simultaneously increased are avoided, and the air exchange rate is too slow caused by the fact that the air inflow and the air discharge in unit time are simultaneously reduced. The exhaust power is ensured to be unchanged, only the opening angle of the air inlet valve is adjusted, and the control and adjustment mode is simpler.
This scheme leans on indoor outer differential pressure to ventilate to indoor through the opening angle of control admission valve, has practiced thrift the energy consumption of power device that admits air, has reduced user's cost of life.
As an implementation mode, the intelligent air supplementing method of the fresh air ventilation system comprises the steps of,
s1, acquiring indoor air quality parameters, and comparing the indoor air quality parameters with set parameters;
s10, when the indoor air quality is judged not to reach the standard, a signal for prompting starting of an exhaust program is sent;
s100, detecting that the frequency and/or time of sending a signal for prompting starting of an exhaust program reaches a set value;
s2, starting an exhaust program to exhaust air from the indoor to the outside;
s31, detecting the indoor pressure, controlling the angle of the gradually opened air inlet valve to a1 when the indoor pressure is reduced to a first set value P1, so that the air inlet quantity and the air outlet quantity in unit time are equal, keeping the state, and maintaining the indoor pressure to be P1 for a set time t 11;
s32, gradually increasing the opening angle of the air inlet valve to a12, detecting the indoor pressure, when the indoor pressure rises to P12, instantaneously reducing the opening angle of the air inlet valve to a120, enabling the air inlet quantity and the air outlet quantity in unit time to be equal, keeping the state, and maintaining the indoor pressure to be P12 for set time t 12;
s33, gradually increasing the opening angle of the air inlet valve to a2, and detecting that the pressure in the chamber rises to P2;
and S4, obtaining indoor air quality parameters, comparing the indoor air quality parameters with the set parameters, judging whether the indoor air quality parameters reach the set parameters, if so, stopping air intake and air exhaust, otherwise, executing the steps S2, S3 and S4 until the indoor air quality parameters reach the set values, and stopping air intake and air exhaust.
The a2 > a12 > a120 > a 1; the P2 > P12 > P1.
Because the indoor pressure is gradually increased, the indoor and outdoor pressure difference is gradually reduced, and the opening angle of the air inlet valve is gradually increased under the condition that the exhaust power is not changed, so that the air inflow and the exhaust amount can be ensured to be equal; in addition, the opening angle of the air inlet valve is gradually increased, so that the situation that the air inlet speed is too high in the process of increasing the opening angle of the air inlet valve to lift the indoor pressure and the fresh air cannot be treated in the subsequent steps is avoided.
The a2 is not greater than the maximum opening angle a of the intake valve.
Further, if the intake valve is opened to the maximum opening angle a or the intake rate cannot be made larger than the exhaust rate, the chamber pressure is raised to P2, the exhaust rate is lowered so that the intake rate is made larger than the exhaust rate at least in the state where the intake valve is opened to the maximum opening angle a, and the chamber pressure is raised to P2.
As shown in fig. 3, in step S3, after the air intake valve is opened, there is step S30 in which the fresh air to be taken into the room is purified. Carry out purification treatment to letting in indoor new trend, guarantee to get into the quality of indoor new trend, be favorable to user's physical and mental health.
Further, step S30 is a step before performing purification, in which an air quality parameter of fresh air to be introduced into the room is detected, the detected air quality parameter is compared with a set parameter, whether the detected air quality parameter reaches the set parameter is judged, and if yes, the detected air quality parameter is directly introduced into the room; otherwise, step S30 is executed.
The fresh air ventilation system comprises a purification unit, the step S30 comprises a step of opening the purification unit, the step S30 of opening the purification unit and the step S31 of opening the air inlet valve are carried out simultaneously, or the air inlet valve is opened first and then the purification unit is opened.
The step S30 of performing purification further includes step S301 of detecting an air quality parameter of the purified fresh air, comparing the detected air quality parameter with a set parameter, and determining whether the air quality parameter reaches the set parameter, if so, performing the next step, otherwise, continuing to perform purification until the air quality parameter of the purified fresh air reaches the set value.
Further, after the step S30 is executed for purification, there is a step S300 of adjusting the temperature of the purified fresh air; the step of adjusting the temperature of the purified fresh air comprises the step of S3001, detecting the temperature of the purified fresh air; if the temperature of the purified fresh air is lower than a first preset value T1, heating the purified fresh air; if the temperature of the purified fresh air is higher than a second preset value T2, cooling the purified fresh air;
otherwise, directly introducing the purified fresh air into the room; the T1 < T2.
And detecting the temperature of the heated/cooled fresh air, if the temperature of the heated/cooled fresh air meets the requirement, namely the temperature of the heated/cooled fresh air is not lower than a first preset value T1 and is not higher than a second preset value T2, discharging the heated/cooled fresh air to the room, otherwise, continuing to heat/cool the purified fresh air until the temperature meets the requirement.
The purified fresh air is heated or cooled, so that the indoor temperature can be kept within a certain range, and the temperature of the newly exchanged fresh air is ensured to meet the temperature required by a user. In addition, the purified fresh air is heated or cooled, so that unnecessary heating or cooling can be avoided, the heating or cooling efficiency can be improved, and energy can be saved.
As shown in fig. 4, another objective of the present invention is to provide a fresh air ventilation system, which includes an air intake device 3 with an air intake valve 32, a range hood 2 with an air exhaust device 21, a pressure detection device 4, an air quality detection device 8, and a central control unit 1; the central control unit 1 comprises a first signal receiving module for receiving indoor air quality parameter information detected by the air quality detection device 8; the second signal receiving module is used for receiving the indoor pressure parameter information detected by the pressure detection device 4; a judging module at least used for judging the time for starting the exhaust device 21 according to the received indoor air quality parameter information and judging the time for opening the air inlet valve 32 according to the received pressure parameter information; the first signal sending module is used for sending an exhaust signal to the exhaust device 21; and a second signal sending module for sending the opening time of the air inlet valve 32 to the air inlet valve 32.
The fresh air ventilation system also comprises an airflow detection unit for detecting the parameter information of the gas flow and the gas flow speed of the gas inlet and the gas outlet; the central control unit 1 further comprises a third signal receiving module for receiving the air intake and exhaust parameter information detected by the air flow detection unit; a calculation module, which is used for calculating at least the opening angle and the exhaust power of the intake valve 32 according to the received indoor pressure parameter information and the intake and exhaust parameter information; and a third signal sending module, configured to send the opening angle of the intake valve 32 to the intake valve 32, and send the exhaust power of the exhaust apparatus 21 to the exhaust apparatus 21.
The fresh air ventilating system also comprises a fresh air processing device 5 which is used for processing the fresh air introduced into the room; the fresh air processing device 5 comprises a purification unit 51 for filtering and purifying fresh air introduced into a room; and a temperature adjusting unit 52 for heating or cooling the fresh air introduced into the room and/or the purified fresh air.
The air intake device 3 is openably and closably connected to the indoor and outdoor.
The fresh air processing device 5 comprises a purification unit 51 for filtering and purifying fresh air introduced into the room; and a temperature adjusting unit 52 for heating or cooling the fresh air introduced into the room and/or the purified fresh air.
The exhaust device 21 comprises a fan for extracting fresh air and an exhaust pipe for guiding the extracted fresh air out of the room.
The range hood 2 is installed in a kitchen, the air inlet device 3 is provided with at least one air inlet device and is at least installed in a room far away from the kitchen, the room provided with the air inlet device 3 can be communicated with other rooms in an opening and closing mode through a door or a communication device, the exhaust device 21 and the room provided with the air inlet device 3 can be communicated in an opening and closing mode through the door or the communication device, a fresh air passage can be formed in the whole room, and the fresh air passage is used for replacing air in at least one room.
In one embodiment, the air inlet devices 3 are respectively installed in a kitchen and other rooms including a living room, a bedroom, a bathroom and the like, and the other rooms can form a passage with the exhaust device 21 of the range hood 2, so that fresh air entering the other rooms from the air inlet unit 31 can be finally exhausted through the exhaust device 21. Because the air inlet devices 3 are arranged in all the rooms, when the air quality of one room is poor, doors of other rooms or communication devices for communicating the exhaust device 21 with other rooms can be correspondingly closed, and only the room with poor air quality is communicated with the exhaust device 21, so that a passage is formed between the room with poor air quality and the exhaust device 21, local ventilation can be realized, and energy consumption is saved.
The pressure detection device 4 is installed in a room where the air intake device 3 is installed, and/or is installed on a passage formed by the room where the air intake device 3 is installed and the exhaust device 21, or the pressure detection device 4 is installed in all rooms.
As an embodiment, the living room is an open space, and other rooms are communicated with the kitchen through doors of all rooms and the living room, the pressure detection device 4 is at least installed in the living room, and after the room to be replaced is communicated with the exhaust device 21, the pressure detection device plays a role in detecting pressure under the action of air circulation pressure equalization.
As a preferable scheme of the above scheme, a pressure detection device 4 is provided in each room, and the pressure value in the ventilated room is acquired correspondingly.
The air inlet device 3 also comprises an air inlet unit 31 which is communicated with the indoor and the outdoor and is used for introducing fresh air from the outdoor to the indoor; the air inlet valve 32 is installed on the air inlet unit 31 and used for controlling the on-off of the air path according to the control information sent by the second signal sending module of the central control unit 1. The intake valve 32 is an electric valve.
The purification unit 51 is installed on the air intake unit 31, and further, the purification unit 51 is installed inside the air intake unit 31 and located at the downstream of the air intake valve 32, and is used for purifying the air introduced into the room.
The purification unit 51 comprises a filter, a filter screen, an ozone generator and the like, wherein the filter comprises a non-woven fabric layer, a styrene-divinylbenzene crosslinked adsorption resin filter layer, an activated carbon layer, a bamboo charcoal fiber layer, a nylon layer, a wool fiber layer, a polyphenylene sulfide fiber layer, a glass fiber layer, a carbon nanofiber fabric layer and the like.
The temperature adjusting unit 52 is located at the downstream of the purifying unit 51 and is used for heating or cooling the purified fresh air which meets the set parameters.
The air quality detection devices 8 are at least two, are respectively installed indoors and in the air inlet unit 31, are respectively used for detecting the indoor air quality and the quality of the purified fresh air, and are introduced into the rooms from the air inlet unit 31 after the purified fresh air reaches set parameters.
In one embodiment, an air quality detection device 8 is installed in each room in the room.
The air inlet unit 31 is further provided with a temperature detection device 6 for detecting the temperature of the fresh air to be introduced into the room and/or the temperature of the processed fresh air. Further, the temperature detection device 6 is installed downstream of the purification unit 51, and is configured to detect the temperature of the purified fresh air and the temperature of the heated/cooled fresh air.
The range hood 2 is a dual-purpose range hood integrating an external exhaust type and a circulation type, that is, the range hood 2 further comprises a purification and circulation device 23. Purify circulating device 23 and include the purification portion, purify circulating device 23 and utilize the indoor air of fan extraction, let in the purification portion with the new trend of extraction, later pass through the exhaust portion from the other end of purification portion and discharge the new trend after purifying into indoorly, reach the purpose of purifying room air.
The range hood 2 of the invention is a dual-purpose range hood integrating an external exhaust type and a circulation type, and can replace indoor air by using an external exhaust function under the condition of poor indoor air quality; when the indoor air quality is not very poor, utilize range hood 2 self purification performance, recirculate indoor after filtering and purifying to indoor air, guarantee indoor temperature and humidity's invariant, can reduce the waste of resources that trades wind and heating or cooling cause. In addition, the range hood 2 is provided with an independent range hood panel 22, the operation of the range hood 2 is controlled, and the air pumping and exhausting functions of the range hood 2 can be exerted independently.
The fresh air ventilation system also comprises an operation module 7 for controlling the running state of the fresh air ventilation system; the control module 7 comprises a terminal control unit 71, which is used for receiving and displaying the running state and/or detection information of the fresh air ventilation system, and controlling the running or stopping of the fresh air ventilation system; the terminal control unit 71 comprises a mobile terminal 711, which is used for receiving and displaying the running state and/or detection information of the fresh air ventilation system, and remotely controlling the running or stopping of the fresh air ventilation system; and the control panel 712 is used for receiving and displaying the operation state and/or detection information of the fresh air ventilation system, and controlling the operation or stop of the fresh air ventilation system.
The mobile terminal 711 includes a mobile phone, a watch, a tablet, and the like. The user can directly control panel 712 control new trend air exchange system operation at home, also can be in the not condition at home, and remote control starts exhaust apparatus 21, takes a breath to indoor in advance, gets home again under the condition that indoor air meets the requirements.
The central control unit 1 receives the instruction sent by the control module 7 and sends the instruction to the fresh air ventilation system, and receives the feedback data/information of the fresh air ventilation system, processes the data/information and sends the processed data/information to the control module 7.
The air quality detecting device 8 comprises2Sensor, CO2Sensors, PM2.5 sensors, ammonia sensors, TVOC sensors, etc. The air quality detection device 8 sends the detected data to the central control unit 1, the central control unit 1 compares the relevant data with the set parameters to judge whether the air quality is required, and if not, the central control unit 1 sends a signal for requesting ventilation to the terminal control unit 71 to request the start of an exhaust program.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. An intelligent air supplement method of a fresh air ventilation system, the fresh air ventilation system comprises an air inlet valve, and is characterized in that the intelligent air supplement method comprises the steps of,
s1, acquiring indoor air quality parameters, and comparing the indoor air quality parameters with set parameters;
s2, starting an exhaust program to exhaust air from the indoor to the outside;
and S3, detecting the pressure in the chamber, controlling the air inlet valve to open when the pressure in the chamber is reduced to a first set value, and intermittently changing the pressure in the chamber to lift the pressure in the chamber in a stage.
2. The intelligent air supplementing method of a fresh air ventilating system according to claim 1, wherein in the step S1, the indoor air quality parameter is obtained, and after the indoor air quality parameter is compared with the set parameter, it is determined that when the indoor air quality does not meet the standard, a signal prompting the start of the exhaust program is sent.
3. An intelligent air supplementing method for a fresh air ventilation system according to claim 2, wherein the air exhausting program is started by detecting that the number and/or time of sending a signal prompting the start of the air exhausting program reaches a set value.
4. An intelligent air supplementing method for a fresh air ventilating system according to claim 1, wherein in the step S3, the manner of raising the indoor pressure stage comprises,
setting at least two pressure set values for maintaining stable pressure, maintaining the pressure for a set time when detecting that the indoor pressure reaches a first pressure set value, then increasing the indoor pressure to a second pressure set value, and maintaining the pressure for another set time;
repeating the steps until the pressure in the chamber rises to a second set value;
the first set value is smaller than or equal to the first pressure set value and smaller than or equal to the second pressure set value.
5. The intelligent air supplement method of a fresh air ventilation system according to claim 4, wherein in the step S3, after the indoor pressure is increased to the second set value, the step S4 is further included, the indoor air quality parameter is obtained, the indoor air quality parameter is compared with the set parameter, whether the set parameter is reached is judged, if the set parameter is reached, the air intake and the air exhaust are stopped, otherwise, the air intake valve is closed, the air intake is stopped, the exhaust process in the step S2 and the steps S3 and S4 are continuously executed until the indoor air quality parameter reaches the set parameter, and the air intake and the air exhaust are stopped.
6. An intelligent air supplementing method for a fresh air ventilating system according to claim 4 or 5, wherein in the step S3, the method for maintaining the indoor pressure includes instantaneously controlling the opening angle and/or the exhaust power of the intake valve so that the intake air amount and the exhaust air amount per unit time are equal to each other, and keeping the state.
7. The intelligent air supplementing method of a fresh air ventilating system according to claim 1, wherein in step S3, after the air intake valve is opened, there is a step of performing purification to purify the fresh air to be introduced into the room.
8. The intelligent air supplementing method of a fresh air ventilating system according to claim 7, wherein the performing of purification includes the steps of detecting an air quality parameter of the purified fresh air, comparing the detected air quality parameter with a set parameter, determining whether the set parameter is reached, if so, performing the next step, otherwise, continuing to perform purification until the air quality parameter of the purified fresh air reaches the set parameter.
9. The intelligent air supplementing method of a fresh air ventilating system according to claim 8, wherein there is a step of adjusting the temperature of the purified fresh air after performing the purification;
the adjusting of the temperature of the purified fresh air comprises the steps of,
detecting the temperature of the purified fresh air;
if the temperature of the purified fresh air is judged to be lower than a first preset value T1, heating the purified fresh air;
if the temperature of the purified fresh air is judged to be higher than a second preset value T2, cooling the purified fresh air;
otherwise, directly introducing the purified fresh air into the room;
the T1 < T2.
10. A fresh air ventilation system is characterized by comprising an air inlet valve, a range hood for providing an exhaust device, a pressure detection device, an air quality detection device and a central control unit;
the central control unit comprises a central control unit which comprises,
the first signal receiving module is used for receiving indoor air quality parameter information detected by the air quality detection device;
the second signal receiving module is used for receiving the indoor pressure parameter information detected by the pressure detection device;
the judging module is at least used for judging the time for starting the exhaust device according to the received indoor air quality parameter information and judging the time for opening the air inlet valve according to the received pressure parameter information;
the first signal sending module is used for sending an exhaust signal to an exhaust device;
and the second signal sending module is used for sending the opening time of the air inlet valve to the air inlet valve.
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