CN106123193B - A kind of PM2.5And CO2The Intelligent fresh air ventilator and fresh air processing method of joint control - Google Patents
A kind of PM2.5And CO2The Intelligent fresh air ventilator and fresh air processing method of joint control Download PDFInfo
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- CN106123193B CN106123193B CN201610576599.2A CN201610576599A CN106123193B CN 106123193 B CN106123193 B CN 106123193B CN 201610576599 A CN201610576599 A CN 201610576599A CN 106123193 B CN106123193 B CN 106123193B
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- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000005265 energy consumption Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims description 45
- 239000013618 particulate matter Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 21
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
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- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 375
- 238000013461 design Methods 0.000 description 6
- 238000004887 air purification Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000011118 depth filtration Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F24F2110/10—Temperature
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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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2110/64—Airborne particle content
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Ventilation (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of PM2.5And CO2The Intelligent fresh air ventilator and fresh air processing method of joint control, new blower include fresh wind port, air outlet, return air inlet, exhaust outlet, total-heat exchanger, first to fourth air duct.Electric air valve a, grade one filter a, Electric air valve b are disposed with by fresh air flow direction in first air duct；Fresh air flow direction is provided with Electric air valve c, Electric air valve f, secondary filter, breeze fan in second air duct；Grade one filter b, Electric air valve d are disposed with by return air flow direction in third air duct；Exhaust fan is disposed with by return air flow direction in 4th air duct；Central baffle and Electric air valve e mounted thereto are equipped between second air duct and third air duct；The present invention reduces air-conditioning and fan energy consumption according to indoor and outdoor air quality, six kinds of different working modes of intelligent opening to greatest extent, has significant energy-saving benefit.
Description
Technical Field
The invention belongs to the field of air purification, and relates to a PM reducing agent suitable for occasions with higher air quality requirements, such as classrooms, offices and the like2.5And CO2Concentration intelligent fresh air machine technology.
Background
In recent years, the atmospheric pollution situation of China is very severe, severe haze weather is encountered for many times in North China, east China, southwest China and the like, wherein the main pollutant source is fine particulate matter PM2.5。PM2.5Refers to particles with an aerodynamic equivalent diameter less than or equal to 2.5 μm in ambient air. PM in air2.5It is easy to carry a large amount of toxic and harmful substances, enters deep lung of human body through respiratory tract and circulates in blood, thus causing harm to human body.
At present, the main methods available for indoor air purification at home and abroad comprise window opening ventilation, a movable air purifier and an independent fresh air machine.
Windowing ventilation is the easiest and easiest method for purifying indoor air, but there is a possibility that outdoor polluted air deteriorates indoor air quality. When PM is outdoors2.5When the concentration is higher, the window opening ventilation can not improve the indoor air quality, but can further deteriorate the indoor air environment.
The adoption of movable air purifier can reduce PM in indoor air2.5Another common means of concentration. The working principle of the mobile air purifier is that the mobile air purifier is placed in a relatively closed indoor environment, air circulates through the purifier, and the concentration of pollutants in the environment is gradually attenuated along with the increase of the number of air circulation times. However, the mobile air purifier needs to operate in a relatively closed indoor environment, thereby causing indoor CO2The accumulation makes it unsuitable for use in situations where people are dense and require air circulation.
The existing independent fresh air machine mainly utilizes a filter section to purify fresh air so as to dilute indoor PM2.5And (4) concentration. The indoor latent heat load is borne by fresh air, and the sensible heat load is borne by air conditioning equipment. However, the existing fresh air machine only considers PM2.5Concentration, absence of CO2Concentration monitoring, most of the air quantity is constant, the operation mode is single, and intelligent adjustment cannot be achieved.
Therefore, the invention combines natural ventilation, indoor air circulation filtration and fresh air filtration, and provides the PM2.5And CO2The energy consumption of the new fan is reduced to the maximum extent by switching six working modes, and the energy-saving benefit is remarkable.
Disclosure of Invention
The technical problem is as follows: the invention provides a guarantee PM2.5And CO2The concentration meets the standard requirement, and PM which reduces the running energy consumption of the fan and the air conditioner to the maximum extent when realizing indoor air purification2.5And CO2Provided are an intelligent combined control fresh air machine and a fresh air processing method.
The technical scheme is as follows: PM of the invention2.5And CO2The intelligent combined control fresh air machine comprises a fresh air inlet, an air supply outlet, an air return inlet, an air exhaust outlet, a total heat exchanger, a first air channel arranged between a fresh air inlet and the fresh air inlet of the total heat exchanger, a second air channel arranged between a fresh air outlet and the air supply outlet of the total heat exchanger, and a fanThe third air duct is arranged between the return air inlet and the return air inlet of the total heat exchanger, and the fourth air duct is arranged between the return air outlet of the total heat exchanger and the air outlet; an upper air duct communicated with the first air duct and the second air duct is arranged above the total heat exchanger, and a lower air duct communicated with the third air duct and the fourth air duct is arranged below the total heat exchanger. The first air channel is sequentially provided with an electric air valve a, a primary filter a and an electric air valve b according to the fresh air flow direction; an electric air valve c, an electric air valve f, a secondary filter and an air supply fan are arranged in the second air channel according to the fresh air flow direction; a primary filter b and an electric air valve d are sequentially arranged in the third air channel according to the return air flow direction; an exhaust fan is sequentially arranged in the fourth air duct according to the return air flow direction; and a central partition plate and an electric air valve e arranged on the central partition plate are arranged between the second air duct and the third air duct.
Furthermore, in the intelligent fresh air fan, the fresh air inlet is provided with PM for detection2.5The primary filter a is arranged close to the electric air valve a, the electric air valve b is positioned at an air duct inlet above the total heat exchanger, and the total heat exchanger and a box central partition plate divide the fresh air fan box into two parts. The air supply outlet is provided with a PM for detection2.5The sensor of concentration, electronic blast gate c and electronic blast gate f set up side by side, and electronic blast gate c is located the secondary filter front side. The return air inlet is provided with a detection chamber for detecting indoor CO2Concentration, temperature and PM2.5And the primary filter b is arranged close to the air return inlet, and the electric air valve d is positioned at the air duct inlet below the total heat exchanger.
Furthermore, in the intelligent fresh air machine, the outer frames of the primary filter a and the primary filter b are galvanized iron frames, and the filter material is non-woven fabric, nylon mesh, active carbon filter material or metal mesh.
Furthermore, in the intelligent fresh air machine, the secondary filter is a strong electric field medium module.
PM of the invention2.5And CO2Integrated control fresh airProcessing method based on the PM2.5And CO2The intelligent joint control fresh air machine is based on indoor and outdoor PM2.5Concentration sensor, temperature sensor, and indoor CO2The data detected by the concentration sensor respectively adopts the following six working modes: the fresh air filtering mode comprises a fresh air filtering mode I, a fresh air filtering mode II, a fresh air filtering mode III, an internal circulation filtering mode, a natural ventilation mode and a standby mode;
wherein, the work flow of new trend filtration mode one does: the electric air valve a is opened, the electric air valve f is opened, the electric air valve b is closed, the electric air valve d is closed, fresh air sequentially passes through the fresh air opening → the electric air valve a → the first-stage filter a → the total heat exchanger → the electric air valve f → the air supply fan, is sent into a room through the air supply opening, and return air sequentially passes through the return air opening → the first-stage filter b → the total heat exchanger → the air exhaust fan and is exhausted to the outside through the air exhaust opening; the working process of the fresh air filtering mode two is as follows: the electric air valve a is opened, the electric air valve c is opened, the electric air valve f is closed, the electric air valve d is closed, fresh air is sent into a room through an air supply port sequentially through a fresh air port → the electric air valve a → a primary filter a → a total heat exchanger → the electric air valve c → a secondary filter → an air supply fan, and return air is exhausted to the outside through an air outlet sequentially through a return air port → a primary filter b → the total heat exchanger → an air exhaust fan; the working process of the fresh air filtering mode III is as follows: the electric air valve a is opened, the electric air valve b is opened, the electric air valve c is opened, the electric air valve f is closed, the electric air valve d is opened, fresh air sequentially passes through a fresh air inlet → a first-stage filter a of the electric air valve a → the electric air valve b → the electric air valve c → a second-stage filter → an air supply fan, is sent into a room through an air supply outlet, and return air sequentially passes through a return air inlet → a first-stage filter b → the electric air valve d → an air exhaust fan and is exhausted to the outside through an air outlet; the working process of the internal circulation filtering mode comprises the following steps: the electric air valve e is opened, the electric air valve c is opened, the electric air valve f is closed, the electric air valve a is closed, and return air sequentially passes through the primary filter b → the electric air valve e → the electric air valve c → the secondary filter → the air supply fan and is sent into a room through an air supply outlet; the working process of the natural ventilation mode comprises the following steps: fresh air is introduced by windowing, so that the energy consumption of the fan is reduced; the standby mode is that the fresh air fan is in standby state without any operation under the condition that the indoor air quality reaches the standard.
Further, in the method of the present invention, the first fresh air filtering mode is adopted when: non-transient season, outdoor air PM2.5When the concentration reaches the standard.
Further, in the method of the present invention, the fresh air filtering mode two is adopted when: non-transient season, outdoor air PM2.5And (5) when the concentration exceeds the standard.
Further, in the method of the present invention, the fresh air filtering mode three is adopted in the following cases: transitional season, outdoor air PM2.5When the concentration reaches the standard.
Further, in the method of the present invention, the internal circulation filtration mode is adopted when: indoor PM2.5Excessive concentration and CO2The concentration is not over standard.
Further, in the method of the present invention, the natural ventilation mode is adopted in the following cases: transitional season, outdoor air PM2.5When the concentration reaches the standard.
In the invention, the total heat exchanger is coupled with the upper air duct and the lower air duct, and different air ducts are switched according to the opening and closing of the electric air valve b and the electric air valve d. The specific implementation is as follows: when the electric air valve b and the electric air valve d are opened, the fresh air and the exhaust air respectively flow through the upper air channel and the lower air channel, namely the bypass of the total heat exchanger is performed, otherwise, the fresh air and the exhaust air enter the middle total heat exchanger for heat exchange and then respectively enter the respective air channels.
The opening and closing of the electric air valve c and the electric air valve f can bypass the secondary filter. The specific implementation is as follows: when electronic blast gate c opened and electronic blast gate f closed, the new trend carries out depth filtration and purifies the back through the secondary filter and sends into indoor by air supply fan, and when electronic blast gate c closed and electronic blast gate f opened, the new trend was walked around the secondary filter and is directly sent into indoor through air supply fan, and the windage reduces greatly this moment.
The opening of the electric air valve e can switch the intelligent fresh air fan to an internal circulation filtering mode. When the electric air valve e is opened, the return air is efficiently filtered by the secondary filter and then is sent into the room through the air supply outlet, so that the situation that when outdoor pollution is serious, fresh air is filtered to increase more fan energy consumption can be avoided, and otherwise, the indoor return air is exhausted to the outside through the air exhaust channel.
Cannot guarantee CO aiming at the prior movable air purifier2The main problems that the concentration meets the standard requirement, the operation mode of the fresh air fan with the fixed air volume is single and the energy consumption is large are comprehensively considered2Concentration and PM2.5Concentration, three indoor air purification methods of natural ventilation, indoor air circulation filtration and fresh air filtration are combined, a fresh air fan with six different working modes is designed, and the operation energy consumption of the fan and an air conditioner is reduced to the maximum extent while the indoor air purification is realized. In non-transitional seasons, the heat recovery is carried out on the exhaust air, so that the fresh air is precooled/preheated before entering the room, and the energy consumption of an air conditioning system is reduced; in a transition season, because the heat and humidity load of outdoor air is small, the energy consumption of an air conditioner is reduced without considering heat recovery, a total heat exchanger in a fresh air machine is bypassed, the wind resistance of a system is reduced, and the energy consumption of a fan is saved; when the fresh air is filtered, the fresh air selectively passes through the secondary filter according to the indoor and outdoor air quality, so that unnecessary energy consumption of the fan is saved; when indoor CO2And when the concentration reaches the standard, the internal circulation filtration mode is started timely.
Has the advantages that: compared with the existing new fan (with total heat recovery), the invention has the following advantages:
1) the existing fresh air machine with fixed air volume only considers PM2.5The concentration filters the fresh air, so that the operation mode is single, and unnecessary energy consumption loss of the fan caused by untimely constant fresh air volume also exists. PM provided by the design2.5And CO2Intelligent new fan of allies oneself with accuse comprehensively considers PM2.5And CO2Concentration according to indoor and outdoor temperature and PM2.5And CO2The data detected by the concentration sensor intelligently opens six different working modes, and the concentration of the concentration sensor are in one stateThe fresh air quantity is selected by reducing to the limit value within a fixed time, so that the defects of single operation mode and large energy consumption of the existing fresh air fan are effectively overcome.
2) Compared with the existing fresh air machine, the bypass selection of the total heat exchanger is increased. Through the coupling of the total heat exchanger and the upper air duct and the lower air duct, the total heat recovery in non-transition seasons can be realized, the energy consumption of an air conditioning system is reduced, the bypass of the total heat exchanger in transition seasons can be realized, the wind resistance is reduced, and the energy consumption of a fan is saved.
3) Compared with the existing fresh air machine, the fresh air filtering degree is increased. According to the indoor and outdoor air quality, the bypass of the electric air valve to the secondary filter can enable fresh air to selectively pass through the secondary filter, so that the wind resistance is reduced, and the energy consumption of the fan is further saved.
4) According to the actual measurement data of outdoor weather in Nanjing area 2015-2016 and 2, the new fan is subjected to benefit analysis by taking a certain classroom of the Zhongshan institute of southeast university as an example. The outdoor meteorological data are analyzed, and the running days of the new fan in the design under different modes all year round can be obtained, as shown in table 1.
TABLE 1 number of days of operation of fresh air blower in different modes
The energy consumption of the new fan of the design and the conventional new fan is calculated, and the result is shown in table 2.
TABLE 2 annual energy consumption comparison of the new fan of the design with the traditional new fan
As can be seen from the table 2, the new fan of the design intelligently opens different working modes by balancing the indoor and outdoor air quality according to the outdoor meteorological conditions, and compared with the traditional new fan, the new fan of the design can save 277.04kW & h of energy consumption all the year round and occupies 21.6% of the total energy consumption of the traditional new fan.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of a main body a of the new fan of the present invention.
Fig. 3 is a schematic structural diagram of the total heat exchanger.
FIG. 4 is a schematic view of a primary filter configuration.
FIG. 5 is a schematic diagram of a two-stage filter configuration.
The figure shows that: a-a fresh air machine; b-a control panel; 1-fresh air port; 2-electric air valve a; 3-first-stage filter a; 4-electric air valve b; 5-total heat exchanger; 6-electric air valve c; 7-a secondary filter; 8-air supply fan; 9-an air supply outlet; 10-air return inlet; 11-first stage filter b; 12-electric air valve d; 13-an exhaust fan; 14-an air outlet; 15-electric air valve e; 16-electric air valve f; 17-PM2.5A concentration sensor a; 18-temperature sensor a; 19-PM2.5A concentration sensor b; 20-temperature sensor b; 21-CO2A concentration sensor; 22-PM2.5And a concentration sensor c.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings.
The overall structure of the present embodiment is schematically shown in fig. 1, and includes a fresh air machine a and a control panel B. PM (particulate matter)2.5Concentration sensor a17, PM2.5Concentration sensor b19, PM2.5Concentration sensor c22, temperature sensor a18, temperature sensor b20 and CO detection2The concentration sensors 21 are arranged at the fresh air inlet 1, the supply air inlet 9 and the return air inlet 10 at the positions shown in fig. 1. Wherein,the main structure schematic diagram of the fresh air machine is shown in fig. 2.
The fresh air machine A comprises a fresh air inlet 1, an air supply outlet 9, a return air inlet 10, an air outlet 14, a total heat exchanger 5, a first air channel arranged between a fresh air inlet of the total heat exchanger 5 and the fresh air inlet 1, a second air channel arranged between a fresh air outlet of the total heat exchanger 5 and the air supply outlet 9, a third air channel arranged between a return air inlet of the total heat exchanger 5 and the return air inlet 10, and a fourth air channel arranged between a return air outlet of the total heat exchanger 5 and the air outlet 14; the first air duct is sequentially provided with an electric air valve a2, a primary filter a3 and an electric air valve b4 according to the fresh air flow direction; an electric air valve c6, an electric air valve f16, a secondary filter 7 and an air supply fan 8 are arranged in the second air channel according to the fresh air flow direction; a primary filter b11 and an electric air valve d12 are sequentially arranged in the third air duct according to the return air flow direction; an exhaust fan 13 is sequentially arranged in the fourth air duct according to the return air flow direction; and a central partition plate and an electric air valve e15 arranged on the central partition plate are arranged between the second air duct and the third air duct.
The fresh air inlet 1 is provided with PM2.5Concentration a17 and temperature sensor a18, the primary filter a3 is arranged next to the electric air valve a2, the electric air valve b4 is arranged at the air duct inlet above the total heat exchanger 5, and the total heat exchanger 5 and a box central partition plate divide the fresh air fan box into two parts.
The air supply outlet 9 is provided with PM2.5And a concentration sensor c22, wherein the electric air valve c6 and the electric air valve f16 are arranged side by side and are positioned at the front side of the secondary filter 7.
The air return inlet 10 is provided with indoor CO2Concentration sensor 21, temperature sensor b20, and PM2.519 concentration sensor b, the primary filter b11 is arranged close to the air return opening 10, and the electric air valve d12 is positioned at the air duct inlet below the total heat exchanger 5.
The total heat exchanger 5 is coupled with the upper air duct and the lower air duct, and the specific structure is as shown in fig. 3, and different air ducts are switched according to the opening and closing of the electric air valve b4 and the electric air valve d 12. The specific implementation is as follows: when the electric air valve b4 and the electric air valve d12 are opened, fresh air and exhaust air respectively flow through the upper air duct and the lower air duct, which is equivalent to bypassing the total heat exchanger 5, and on the contrary, the fresh air and the exhaust air enter the middle total heat exchanger 5 for heat exchange and then respectively enter the respective air ducts.
The primary filter a3 and the primary filter b11 are mainly used for filtering large particles in fresh air and return air, the removal rate of the particles with the diameter of more than 2.5 mu m is more than 80%, and the specific structure is shown in figure 4. The outer frames of the first-stage filter a3 and the first-stage filter b11 are galvanized iron frames, and the filter material can be non-woven fabric, nylon mesh, activated carbon filter material or metal mesh.
The secondary filter 7 is a strong electric field medium module, has a removal rate of 99.9% of particulate matters with the diameter of 0.3 mu m, has a specific structure shown in figure 5, and not only has the function of efficiently filtering PM2.5And the wind resistance loss is ultralow. The opening and closing of the electric air valve c6 and the electric air valve f16 can bypass the secondary filter 7. The specific implementation is as follows: when the electric air valve c6 is opened and the electric air valve f16 is closed, fresh air is sent into the room by the air supply fan 8 after being subjected to depth filtration and purification through the secondary filter 7, and when the electric air valve c6 is closed and the electric air valve f16 is opened, the fresh air bypasses the secondary filter 7 and is directly sent into the room through the air supply fan 8, so that the air resistance is greatly reduced.
The operation of the present invention will be described in detail with reference to the accompanying drawings.
1. When PM in room2.5Concentration and CO2When the concentration reaches the standard, the new fan does not operate, and the data detected by the sensor, including the temperature and PM of the indoor air, are displayed by the control panel B2.5Concentration and CO2Concentration and temperature of outdoor air, PM2.5And (4) concentration.
2. When PM in room2.5The concentration reaches the standard and CO reaches the standard2When the concentration exceeds the standard, fresh air needs to be introduced to dilute indoor CO2And (4) concentration. According to PM2.5Outdoor air PM monitored by concentration sensor a172.5Concentration and temperature transferThe indoor and outdoor temperatures detected by the sensor a18 and the temperature sensor b20 are specifically analyzed:
(1) when outdoor air PM2.5When the concentration reaches the standard and the indoor and outdoor temperature difference is less than 5 ℃, the fresh air fan stops working, the control panel B prompts window opening and ventilation, and indoor CO is diluted through a natural ventilation mode2Concentration;
(2) when outdoor air PM2.5When the concentration reaches the standard and the indoor and outdoor temperature difference is greater than 5 ℃, a first fresh air filtering mode is started, and the working flow is as follows: the electric air valve a2 is opened, the electric air valve f16 is opened, the electric air valve b4 is closed, the electric air valve d12 is closed, fresh air sequentially passes through a fresh air inlet 1 → the electric air valve a2 → the primary filter a3 → the total heat exchanger 5 → the electric air valve f16 → the air supply fan 8 and is sent into the room through an air supply outlet 9, and return air sequentially passes through a return air inlet 10 → the primary filter b11 → the total heat exchanger 5 → the air exhaust fan 13 and is exhausted to the outside through an air exhaust outlet 14;
(3) when outdoor air PM2.5When the concentration exceeds standard and the indoor and outdoor temperature difference is greater than 5 ℃, a second fresh air filtering mode is started, and the working flow is as follows: the electric air valve a2 is opened, the electric air valve c6 is opened, the electric air valve f16 is closed, the electric air valve d12 is closed, fresh air sequentially passes through a fresh air inlet 1 → the electric air valve a2 → the primary filter a3 → the total heat exchanger 5 → the electric air valve c6 → the secondary filter 7 → the air supply fan 8 and is supplied into a room through an air supply outlet 9, and return air sequentially passes through a return air inlet 10 → the primary filter b11 → the total heat exchanger 5 → the air exhaust fan 13 and is exhausted to the outside through an air exhaust outlet 14;
(4) when outdoor air PM2.5When the concentration exceeds standard and the indoor and outdoor temperature difference is less than 5 ℃, a third fresh air filtering mode is started, and the working flow is as follows: the electric air valve a2 is opened, the electric air valve b4 is opened, the electric air valve c6 is opened, the electric air valve f16 is closed, the electric air valve d12 is opened, fresh air sequentially passes through a fresh air inlet 1 → the electric air valve a2 primary filter a3 → the electric air valve b4 → the electric air valve c6 → the secondary filter 7 → the air supply fan 8 and is supplied into a room through an air supply outlet 9, and return air sequentially passes through a return air inlet 10 → the primary filter b11 → the electric air valve d12 → the air exhaust fan 13 and is exhausted out of the room through an air exhaust outlet 14;
3. when PM in room2.5Excessive concentration and CO2When the concentration is not over standard, according to indoor and outdoor PM2.5The internal circulation filtering mode or the fresh air filtering mode is selected to be started by the concentration comparison. If PM in room2.5If the concentration is higher than the outdoor condition, a fresh air filtering mode is started, specifically according to outdoor PM2.5Whether the concentration exceeds the standard and whether the indoor and outdoor temperature difference is greater than 5 ℃ or not, a fresh air filtering mode I, a fresh air filtering mode II or a fresh air filtering mode III are selected to be started, otherwise, an inner circulation mode is started, and the working flow of the inner circulation filtering mode is as follows: the electric air valve e15 is opened, the electric air valve c6 is opened, the electric air valve f16 is closed, the electric air valve a2 is closed, and the return air passes through the primary filter b11 → the electric air valve e15 → the electric air valve c6 → the secondary filter 7 → the air supply fan 8 in sequence and is sent into the room through the air supply outlet 9;
4. when PM in room2.5Concentration and CO2When the concentration exceeds the standard, according to PM2.5Outdoor air PM detected by concentration sensor a172.5The concentration and the temperature difference between the inside and outside of the room detected by the temperature sensor a18 and the temperature sensor b20 were compared and analyzed in the same manner as in the second case.
In the embodiment of the invention, the daily average PM is determined according to the environmental air quality Standard of the environmental protection agency of China (GB3095-2012)2.5Concentration criterion value 75 μ g/m3 and annual average PM2.5Concentration criterion value 35 μ g/m3, will PM indoor2.5The concentration control value was 35. mu.g/m 3; according to the indoor air quality Standard (GB/T18883-2002) CO2Standard value of concentration of CO2The concentration limit was 1000 ppm.
The transitional season is usually referred to as the non-air-conditioning season in the heating and ventilation field, and the indoor and outdoor temperature difference is 5 ℃ as the judgment standard in the embodiment.
The above examples are only preferred embodiments of the present invention, it should be noted that: it will be apparent to those skilled in the art that various modifications and equivalents can be made without departing from the spirit of the invention, and it is intended that all such modifications and equivalents fall within the scope of the invention as defined in the claims.
Claims (9)
1. PM (particulate matter)2.5And CO2New fan of intelligence of antithetical couplet accuse, its characterized in that, this new fan includes fresh air inlet (1), supply-air outlet (9), return air inlet (10), air exit (14), full heat exchanger (5), set up the first wind channel between full heat exchanger (5) new trend entry and fresh air inlet (1), set up the second wind channel between full heat exchanger (5) new trend export and supply-air outlet (9), set up the third wind channel between full heat exchanger (5) return air entry and return air inlet (10), set up the fourth wind channel between full heat exchanger (5) return air export and air exit (14), full heat exchanger (5) topAn upper air duct communicated with the first air duct and the second air duct is arranged, and a lower air duct communicated with the third air duct and the fourth air duct is arranged below the total heat exchanger (5);
the first air channel is sequentially provided with an electric air valve a (2), a primary filter a (3) and an electric air valve b (4) according to the fresh air flow direction; an electric air valve c (6), an electric air valve f (16), a secondary filter (7) and an air supply fan (8) are arranged in the second air channel according to the fresh air flow direction; a primary filter b (11) and an electric air valve d (12) are sequentially arranged in the third air channel according to the return air flow direction; an exhaust fan (13) is sequentially arranged in the fourth air channel according to the return air flow direction; a central partition plate and an electric air valve e (15) arranged on the central partition plate are arranged between the second air duct and the third air duct:
the fresh air inlet (1) is provided with PM for detection2.5The primary filter a (3) is arranged close to the electric air valve a (2), the electric air valve b (4) is positioned at the inlet of the upper air duct, and the total heat exchanger (5) and a central partition board of the box body divide the fresh air fan box body into two parts;
the air supply outlet (9) is provided with a PM for detection2.5The concentration sensor comprises an electric air valve c (6) and an electric air valve f (16) which are arranged side by side, and the electric air valve c (6) is positioned on the front side of the secondary filter (7);
the return air inlet (10) is provided with a detection chamber for detecting indoor CO2Concentration, temperature and PM2.5A sensor of concentration; the primary filter b (11) is arranged close to the air return opening (10), and the electric air valve d (12) is positioned at the inlet of the lower air duct.
2. A PM according to claim 12.5And CO2The intelligent joint-control fresh air machine is characterized in that outer frames of the primary filter a (3) and the primary filter b (11) are galvanized iron frames, and filter materials are non-woven fabrics, nylon nets, activated carbon filter materials or metal meshes.
3. A PM according to claim 1 or 22.5And CO2New fan of intelligence of allies oneself with accuse, its characterized in that, instituteThe secondary filter (7) is a strong electric field medium module.
4. PM (particulate matter)2.5And CO2Method for the integrated control of fresh air treatment, characterized in that the method is based on the PM of claim 1, 2 or 32.5And CO2The intelligent joint control fresh air machine is based on indoor and outdoor PM2.5Concentration, temperature and indoor CO2The data detected by the concentration sensor respectively adopts the following six working modes: the fresh air filtering mode comprises a fresh air filtering mode I, a fresh air filtering mode II, a fresh air filtering mode III, an internal circulation filtering mode, a natural ventilation mode and a standby mode;
the working process of the fresh air filtering mode I is as follows: the method comprises the following steps that an electric air valve a (2) is opened, an electric air valve f (16) is opened, an electric air valve b (4) is closed, an electric air valve d (12) is closed, fresh air sequentially passes through a fresh air inlet (1) → the electric air valve a (2) → a primary filter a (3) → a total heat exchanger (5) → the electric air valve f (16) → an air supply fan (8), is sent into a room from an air supply outlet (9), and return air sequentially passes through a return air inlet (10) → a primary filter b (11) → the total heat exchanger (5) → an air exhaust fan (13), and is exhausted to the outside from an air outlet (14);
the working process of the fresh air filtering mode two is as follows: the electric air valve a (2) is opened, the electric air valve c (6) is opened, the electric air valve f (16) is closed, the electric air valve d (12) is closed, fresh air sequentially passes through a fresh air inlet (1) → the electric air valve a (2) → the primary filter a (3) → the total heat exchanger (5) → the electric air valve c (6) → the secondary filter (7) → the air supply fan (8) and is sent into a room from an air supply outlet (9), and return air sequentially passes through a return air inlet (10) → the primary filter b (11) → the total heat exchanger (5) → the air exhaust fan (13) and is exhausted to the outside from an air exhaust outlet (14);
the working process of the fresh air filtering mode III is as follows: the electric air valve a (2) is opened, the electric air valve b (4) is opened, the electric air valve c (6) is opened, the electric air valve f (16) is closed, the electric air valve d (12) is opened, fresh air sequentially passes through the fresh air inlet (1), the electric air valve a (2), the primary filter a (3) → the electric air valve b (4) → the electric air valve c (6) → the secondary filter (7) → the air supply fan (8) and is delivered into a room through the air supply outlet (9), and return air sequentially passes through the return air inlet (10) → the primary filter b (11) → the electric air valve d (12) → the air exhaust fan (13) and is exhausted out of the room through the air exhaust outlet (14);
the working process of the internal circulation filtering mode comprises the following steps: opening an electric air valve e (15), opening an electric air valve c (6), closing an electric air valve f (16), closing an electric air valve a (2), and sending return air into a room through an air supply outlet (9) sequentially by a first-stage filter b (11) → the electric air valve e (15) → the electric air valve c (6) → a second-stage filter (7) → an air supply fan (8);
the working process of the natural ventilation mode comprises the following steps: fresh air is introduced by windowing, so that the energy consumption of the fan is reduced;
the standby mode is that the fresh air fan is in standby state without any operation under the condition that the indoor air quality reaches the standard.
5. A PM according to claim 42.5And CO2The joint control fresh air processing method is characterized in that the fresh air filtering mode I is adopted under the following conditions: non-transient season, outdoor air PM2.5When the concentration reaches the standard.
6. A PM according to claim 42.5And CO2The joint control fresh air processing method is characterized in that the fresh air filtering mode II is adopted under the following conditions: non-transient season, outdoor air PM2.5And (5) when the concentration exceeds the standard.
7. A PM according to claim 42.5And CO2The joint control fresh air processing method is characterized in that the fresh air filtering mode III is adopted under the following conditions: transitional season, outdoor air PM2.5When the concentration reaches the standard.
8. A PM according to claim 4, 5, 6 or 72.5And CO2The joint control fresh air processing method is characterized in that the internal circulation filtering mode is adopted under the following conditions: indoor PM2.5Excessive concentration and CO2The concentration is not over standard.
9. A PM according to claim 4, 5, 6 or 72.5And CO2The joint control fresh air processing method is characterized in that the natural ventilation mode is adopted under the following conditions: transitional season, outdoor air PM2.5When the concentration reaches the standard.
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