CN101769585A - Intelligent fresh air control device - Google Patents
Intelligent fresh air control device Download PDFInfo
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- CN101769585A CN101769585A CN201010042046A CN201010042046A CN101769585A CN 101769585 A CN101769585 A CN 101769585A CN 201010042046 A CN201010042046 A CN 201010042046A CN 201010042046 A CN201010042046 A CN 201010042046A CN 101769585 A CN101769585 A CN 101769585A
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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 fresh air control device, which relates to a fresh air conditioning device of an air conditioning system. The intelligent fresh air control device mainly comprises a temperature humidity sensor, a carbon dioxide concentration sensor, a computer controller, an electrically operated valve and the like. The intelligent fresh air control device has the characteristics of intelligent control, convenient use, accurate control, energy-saving operation, small volume and low cost. And the intelligent fresh air control device also has the characteristics of improving the indoor air quality and meeting requirements of people for the indoor comfort and health. The intelligent fresh air control device can be widely applied to the air conditioning systems of various buildings such as residences, hotels, public buildings and the like and is the fresh air device which is controlled intelligently and saves energy.
Description
One, technical field:
The invention belongs to the air-conditioning technical field of building ventilation, particularly the new wind adjusting device of air-conditioning system.
Two, background technology:
Along with expanding economy and growth in the living standard, people are more and more higher to the requirement of air quality.Since people indoor spend around 90%, so IAQ has very important relation with health, and indoor resh air requirement is a key factor that determines IAQ.But along with the use of air-conditioning, the room air pollution problem is more and more serious, more and more is subjected to people's attention.
In addition, according to incompletely statistics, China's building energy consumption has reached 27.5% of total energy consumption at present, and this numeral also will constantly increase along with the fast development of China's building trade.Therefore, along with establishing of energy-saving and emission-reduction fundamental state policy, carrying out of building energy conservation work also seems more significant.In today of energy growing tension, how to guarantee under the prerequisite that the comfortable of people and production are normally carried out, in different seasons, different occasions adopts different new wind operational modes, making the energy consumption of air-conditioning system minimum, reach healthy and the comfortable purpose that both get both, is a difficult problem that needs to be resolved hurrily.
China present stage belongs to the non-imposed project of Kang Ju dwelling house to the requirement of the new wind of air-conditioning system.Its resh air requirement determine to mainly contain three aspects: the one, resh air requirement accounts for the minimum scale of total blast volume, i.e. the minimum fresh air ratio; The 2nd, guarantee that each air-conditioned room has the resh air requirement of hygienic requirements; The 3rd, keep the malleation value of air-conditioned room.Yet at present site coverage is bigger, and construction area is less than normal per capita, in the room air pernicious gas as: the content of carbon monoxide, carbon dioxide etc. also sharply increases.Therefore, when satisfying indoor resh air requirement requirement, also be necessary to detect these pernicious gases, make indoor not only comfortable, and healthy more by regulating resh air requirement.
The existing new wind adjusting device of air-conditioning system, as the patent No. is " indoor fresh air regulating system " patent of ZL200520075161.3, disclosed is in original air-conditioning system, sets up: the remote controllers of fresh wind tube, new air valve, foreign material coarse filter, new wind filter and new air valve interlocking.The major defect of this system is: Duo a cover VMC than original air-conditioning system, make the system architecture complexity, cost increases; Building structure will be reserved the fresh wind tube road more in addition, and the complexity and the influence building that increase building are attractive in appearance, and inconvenience is promoted the use of; In addition, can only regulate resh air requirement, improve indoor comfort, can not unite according to indoor temperature, humidity and carbon dioxide and regulate resh air requirement, can not guarantee healthy requirement.And for example the patent No. is " a kind of new wind by-pass collar " patent of ZL200720063821.5, this device is mounted on the air inlet of air cleaner or indoor apparatus of air conditioner, have new wind inlet and indoor wind inlet on the housing of new wind by-pass collar, housing one side is equipped with dodge gate, and rotatable new wind adjustment doors is installed in the housing.The major defect of this device is: complex structure, cost height; New wind adjustment doors is installed in the housing, can only the manual adjustments resh air requirement, and operation inconvenience, and increased and install and the difficulty of maintenance; In addition, this device volume is bigger, has increased taking up room of central air conditioner system, and is higher to building requirements; In addition, can only guarantee indoor comfortablely, can not guarantee the requirement of room air health.
Three, summary of the invention
The objective of the invention is weak point, a kind of intelligent fresh air control device is provided at the existing new wind adjusting device of air-conditioning system.Have easy to use, simple to operate, measure accurately, characteristics such as precision height, the aperture that can regulate new wind, return air valve automatically according to the change of room air when satisfying the comfortable and hygienic requirements of architecture indoor, reaches the purpose of energy-saving run.
The object of the present invention is achieved like this: a kind of intelligent fresh air control device mainly comprises Temperature Humidity Sensor, gas concentration lwevel sensor, computing controller, electrically operated valve etc.
Temperature Humidity Sensor is 2 commercially available prod, is installed in the fresh wind tube porch and the backwind tube porch of former air-conditioning system respectively, and is connected with computing controller by data connecting line respectively.In order to detecting in the air-conditioning system temperature and humidity that new wind inlet and return air enter the mouth in real time and accurately, and be transferred to computing controller and calculate control.
The gas concentration lwevel detector is 2 commercially available prod, is installed in the fresh wind tube porch and the backwind tube porch of former air-conditioning system respectively, and is connected with computing controller by data connecting line respectively.In order to detecting in the air-conditioning system gas concentration lwevel that new wind inlet and return air enter the mouth in real time and accurately, and be transferred to computing controller and compare control.
Electrically operated valve is 2, is installed in respectively in the fresh wind tube and backwind tube of former air-conditioning system, and is connected with computing controller by data connecting line respectively.2 electrically operated valves also are connected with control cabinet by lead respectively.In order to the control signal according to computing controller, the aperture of control valve reaches the purpose that controls to adjust indoor resh air requirement.
The enthalpy that is mounted with of computing controller commercial (producer's customization) calculates relatively and the chip or the single-chip microcomputer of gas concentration lwevel comparison program.The computing controller of this device is fixed on by the downside or upside or indoor air conditioner of mixed bellows of former air-conditioning system.In order to the new wind inlet of accepting the next air-conditioning system of Temperature Humidity Sensor transmission in real time and the temperature and humidity parameter that return air enters the mouth, carry out the calculating of air enthalpy compares by program, and the new wind of accepting the next air-conditioning system of gas concentration lwevel sensor transmissions in real time enters the mouth and the gas concentration lwevel parameter of return air inlet, compare by program, determine the resh air requirement of air-conditioning system, and send control signal and give electrically operated valve, regulate its aperture, realize the control of air-conditioning system resh air requirement.Then, new wind is sent in the air-conditioned room by mixed bellows, air processor, blower fan and the ajutage of former air-conditioning system, satisfies comfortable and healthy api request in the air-conditioned room.
Use of the present invention:
(1) calculating of enthalpy in the controller
The enthalpy of air is a foundation of weighing cold and heat.The parameter of the temperature and humidity that the Temperature Humidity Sensor that the fresh wind port place is provided with will detect is in real time delivered in the computing controller, carries out the calculating and the comparative analysis of enthalpy.Being calculated as follows of enthalpy wherein:
h＝1.01t+0.001d(2501+1.85t)(KJ/Kg) (1)
In the formula: h---the enthalpy of air, unit: KJ/Kg;
T---air themperature, unit: ℃;
D---air water capacity, unit: g/Kg (a)
Wherein:
In the formula:
---relative air humidity, unit: %
B---atmospheric pressure, unit: Pa
The saturated partial pressure of the steam of correspondence when Ps---air themperature is t, unit: Pa.This value checks in by " Engineering Thermodynamics " (the 4th edition) (1999) appendix that China Construction Industry Press publishes.
Through type (1) and formula (2) can get, and are obtaining under the situation of local atmospheric pressure, and monitoring air themperature and relative humidity can be carried out the calculating of enthalpy.
(2) the control interval critical point determines
According to local meteorological observatory nearly 10 years by time actual measurement statistics, obtain the annual changes in distribution scope of outdoor climate state.Determine office work state point in summer in winter at first earlier, have between certain wave zone.During summer condition, indoor apparatus of air conditioner arrives apparatus dew point to air-treatment earlier, then blows along heat moisture ratio; During winter condition, indoor apparatus of air conditioner is heated to a fixed point with air from apparatus dew point earlier, then blows along heat moisture ratio.Annual with i
W1, i
L1, i
L2And i
W2Isenthalp is divided into 5 zones with i-d figure and regulates, each critical point definite as follows:
i
w: the highest enthalpy point that occurred in the local climate data.According to temperature, relative humidity and water capacity in the meteorological data in local 10 years, calculating can get air enthalpy:
i
N2: in the summer condition, can obtain the enthalpy that N2 is ordered by the temperature and the relative humidity of indoor design parameter.
i
L2: summer condition is the apparatus dew point enthalpy in the return air processing procedure next time.For specific building, indoor waste heat amount in the summer condition and surplus wet amount can obtain by calculating, thereby the heat moisture ratio ε 2 that obtains building on psychrometric chart, intersects the humidity line of heat moisture ratio line prolongation with humidity ψ=95%, and intersection point is dew point L2.
i
L1: winter condition is the apparatus dew point enthalpy in the return air processing procedure next time, in its method of obtaining and the summer condition apparatus dew point obtain identical.
i
W1: the appearance that W1 is ordered is in the winter time in the operating mode, and new wind preheating and the mixed enthalpy of return air can equal i
L1Being the new wind G of system this moment ratio new and that return air G returns satisfies:
Iw: this point is in the local meteorologic parameter, the point that enthalpy is minimum.
Obtaining local meteorological data and in conjunction with the room parameter requirement in the engineering, above-mentioned critical point enthalpy is known parameters.
(3) enthalpy comparison and valve opening are determined
At the new wind porch of system installing Temperature Humidity Sensor, the signal that detects in real time is delivered to chip in the computing controller, carry out outdoor new wind-warm syndrome humidity parameter enthalpy according to formula (1) and formula (2) and calculate, the seasonal adjusting of the new wind of control air-conditioning system.Gas concentration lwevel sensor by being installed in the return air porch detects the gas concentration lwevel of room air and relatively, carries out the adjusting of new air valve, to tackle the variation of the indoor stream of people and air quality on this basis.
Enthalpy compares and valve opening is judged as follows:
1. the enthalpy i of outdoor air
w＜i
W1, belong to cold season in winter, new air valve aperture minimum, the minimum fresh air that remains design is than m, and the minimum fresh air that satisfies indoor hygienic requirements gets final product.On this basis, obtain indoor carbon dioxide concentration parameter value, compare,, then valve opening is transferred big if gas concentration lwevel is higher than 0.10% with the critical value of stipulating 0.10% by the gas concentration lwevel detector; If the room air gas concentration lwevel is lower than 0.10%, then the aperture of valve is turned down, when indoor carbon dioxide concentration reached critical value 0.10%, valve stopped action.
2. the enthalpy i of outdoor air
W1≤ i
w＜i
L1, new air-valve strengthens along with the increase of outdoor air enthalpy on the basis of minimum aperture, when the enthalpy of outdoor air equals i
L1The time, can close refrigeration fully with 100% new wind.No matter how indoor carbon dioxide concentration changes, new air valve 100% is opened.
3. the zone of outdoor enthalpy between " dew point " enthalpy in winter, summer, i
L1≤ i
w＜i
L2This moment, the return air valve need not be regulated, and indoor design condition point changes with new wind state.In this interval, the aperture of new air valve if gas concentration lwevel is higher than 0.10%, is then transferred valve opening big mainly with the foundation of indoor carbon dioxide concentration as judgement; If the room air gas concentration lwevel is lower than 0.10%, then the aperture of valve is turned down, when indoor carbon dioxide concentration reached critical value 0.10%, valve stopped action.
4. the enthalpy i of outdoor air
L2≤ i
w＜i
N2, at this moment begin and will enter summer, turn off return air, new air valve standard-sized sheet enters brand-new wind operational mode.Aperture at this interval new air valve maintains 100% aperture.
5. the enthalpy i of outdoor air
w＞i
N2, air-conditioning is in the middle of the summer operation pattern, opens air returning valve this moment, and new valve area is turned down, is adjusted to system's design minimum fresh air and compares m.On this basis, the indoor carbon dioxide concentration parameter value by the gas concentration lwevel sensor detects compares with the critical value of stipulating 0.10%, if gas concentration lwevel is higher than 0.10%, then valve opening is transferred big; If be lower than 0.10%, then the aperture of valve is turned down, when indoor carbon dioxide concentration reached critical value 0.10%, valve stopped action.
After the present invention adopts technique scheme, mainly contain following effect:
1, easy to use, control intelligently
The present invention is installed on the new wind and return air duct of the former air-conditioning system of building, by the real-time sensing chamber of sensor inner air and outer air humiture and carbon dioxide, automatically calculate and contrast by computing controller, and output regulation signal is regulated the aperture of electrically operated valve automatically, avoid the hysteresis quality of artificial valve regulated, saved lot of manpower and material resources simultaneously.Thereby realize intelligent control, easy to use, easy to utilize.
2, accurate, the energy-saving run of control
The present invention has adopted long-range humiture inspection sensor, computing controller is chip or the single-chip microcomputer that program is housed, can be automatically the enthalpy of outdoor climate parameter is calculated and compares, measure accurately, precision is high, thereby the air quality that has guaranteed architecture indoor requires and the energy-saving run of air-conditioning system.
3, volume is little, does not take construction area
The volume of each element of apparatus of the present invention is little, be the commercially available prod again, cost is low, and after the electric capacity of majority element such as sensor and motor-driven valve and stabilizing circuit and resistance are connected, be installed in by the circuit control bus in the new wind and return air duct of former air-conditioning system, do not need to pass through body of wall, do not take the construction area of Air Conditioning Facilities, save the space of machine room, reduced investment.
4, healthization more
The present invention has installed the gas concentration lwevel sensor, gas concentration lwevel in the sensing chamber in real time, and compare in the GB setting and to control, IAQ improved, make people's living space healthy more, satisfied the comfortable and healthy requirement of architecture indoor.
The present invention can be widely used in the air-conditioning system of various buildings such as dwelling house, public building, is the energy-conservation again aeration device of a kind of Based Intelligent Control.
Four, description of drawings
Fig. 1 is a principle of the invention block diagram.
Among the figure: 1 Temperature Humidity Sensor, 2 gas concentration lwevel sensors, 3 electrically operated valves, 4 exhaust valves, 5 computing controllers, 6 mix bellows, 7 air processors, 8 blower fans, 9 fresh wind tubes, 10 backwind tubes, 11 ajutages, 12 exhaust ducts, 13 air-conditioned rooms.
Five, the specific embodiment
Below in conjunction with the specific embodiment, further specify invention.
Embodiment 1
As shown in Figure 1, a kind of intelligent fresh air control device that is used for large public building mainly comprises Temperature Humidity Sensor 1, gas concentration lwevel sensor 2, electrically operated valve 3 and computing controller 5 etc.
2 commercially available DS airduct Temperature Humidity Sensors 1 and 2 commercially available TT-GMT220 gas concentration lwevel sensors 2 are installed in the fresh wind tube porch and the backwind tube porch of former central air conditioner system respectively; 2 commercial D971X electrically operated valves 3 are installed in respectively in the fresh wind tube and backwind tube of former air-conditioning system.Temperature Humidity Sensor 1, gas concentration lwevel sensor 2 and electrically operated valve 3 are connected with computing controller 5 by data connecting line respectively, and electrically operated valve 3 also is connected with control cabinet by the circuit line respectively.The enthalpy that is mounted with of computing controller 5 commercial (producer's customization) calculates relatively and the chip of gas concentration lwevel comparison program, be placed on former air-conditioning system mixed bellows 6 above, in order to fresh wind tube 9 inlets of accepting the next air-conditioning system of Temperature Humidity Sensor transmission in real time and the temperature and humidity parameter that backwind tube 10 enters the mouth, carry out the calculating of air enthalpy compares by program, and the new wind of accepting the next air-conditioning system of gas concentration lwevel sensor transmissions in real time enters the mouth and the gas concentration lwevel parameter of return air inlet, compare by program, determine the resh air requirement of air-conditioning system, and send control signal and give electrically operated valve 3, regulate its aperture.Then,, send in the air-conditioned room 13, satisfy comfortable and healthy api request in the air-conditioned room by the air that ajutage 11 will be handled by mixed bellows 6, air processor 7 and the blower fan 8 of former air-conditioning system.
Embodiment 2
As shown in Figure 1, a kind of intelligent fresh air adjuster that is used for residential housing, with embodiment 1, feature is: computing controller 5 is placed on the next door of indoor air conditioner for the loading enthalpy of commercial (producer's customization) calculates relatively and the single-chip microcomputer of gas concentration lwevel comparison program.
Claims (1)
1. intelligent fresh air control device, mainly comprise electrically operated valve (3), it is characterized in that Temperature Humidity Sensor (1) in addition, gas concentration lwevel sensor (2) and computing controller (5), Temperature Humidity Sensor (1) is 2 commercially available prod, be installed in fresh wind tube (9) porch and backwind tube (10) porch of former air-conditioning system respectively, and be connected with computing controller (5) by data connecting line respectively, gas concentration lwevel detector (2) is 2 commercially available prod, be installed in fresh wind tube (9) porch and backwind tube (10) porch of former air-conditioning system respectively, and be connected with computing controller (5) by data connecting line respectively, electrically operated valve (3) is 2, be installed in respectively in the fresh wind tube (9) and backwind tube (10) of former air-conditioning system, and be connected with computing controller (5) by data connecting line respectively, 2 electrically operated valves also are connected with control cabinet by lead respectively, computing controller (5) is calculated relatively and the chip or the single-chip microcomputer of gas concentration lwevel comparison program for the commercial enthalpy that is mounted with, be placed on by the downside or upside or indoor air conditioner of mixed bellows (6) of former air-conditioning system, determine the resh air requirement of air-conditioning system, and send control signal and give electrically operated valve (3), regulate its aperture, then, new wind is by the mixed bellows (6) of former air-conditioning system, air processor (7), blower fan (8) and ajutage (11) are sent in the air-conditioned room (13).
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