CN113803864A - A fresh air supply system for building air conditioner - Google Patents
A fresh air supply system for building air conditioner Download PDFInfo
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- CN113803864A CN113803864A CN202111308030.5A CN202111308030A CN113803864A CN 113803864 A CN113803864 A CN 113803864A CN 202111308030 A CN202111308030 A CN 202111308030A CN 113803864 A CN113803864 A CN 113803864A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 156
- 238000004378 air conditioning Methods 0.000 claims abstract description 85
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 78
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 78
- 230000001105 regulatory effect Effects 0.000 claims description 71
- 230000008859 change Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 14
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
本发明涉及一种建筑用空调新风供给***，所述空调新风供给***包括控制器和至少一个空调新风单元，空调新风单元分别用于向建筑中的预定区域提供新风，对建筑按照新风服务的空间进行分区并编号，每一个区域由一个空调新风单元输送新风，通过实时地监测每个区域中的空气的二氧化碳含量和/或人员数量，控制相应的空调新风单元，使得每个空调新风单元输送的新风量都能够实时地匹配该区域中的新风需求量，从而既能够满足国家标准的要求，又能够降低新风***的能耗，提高能源利用效率。
The invention relates to an air conditioning fresh air supply system for buildings. The air conditioning fresh air supply system includes a controller and at least one air conditioning fresh air unit. The air conditioning fresh air units are respectively used to provide fresh air to predetermined areas in the building, and provide fresh air to the spaces of the building that are served by the fresh air. Partition and number, each area is supplied with fresh air by an air conditioner fresh air unit, and by monitoring the carbon dioxide content and/or the number of personnel in the air in each area in real time, the corresponding air conditioner fresh air unit is controlled, so that each air conditioner fresh air unit can deliver the fresh air. The fresh air volume can match the fresh air demand in the area in real time, which can not only meet the requirements of national standards, but also reduce the energy consumption of the fresh air system and improve the energy efficiency.
Description
Technical Field
The invention relates to the field of building environments, in particular to an air conditioner fresh air supply system used in a building.
Background
For large buildings, especially buildings for public use, such as station halls, hospitals, exhibition halls, gymnasiums and the like, the internal space is huge and more people can be in the internal space during normal operation, carbon dioxide generated during breathing of people, air pollution released by building materials in the building and polluted gas generated by other objects can cause the problems of reduction of oxygen content, increase of carbon dioxide content, increase of harmful polluted gas, peculiar smell and the like in the air in the internal space, so that the air quality in the internal space is reduced, particularly, the breeding of harmful microorganisms is easily caused by the closed air, the health of human bodies is directly harmed, and public health events are easily caused.
However, because these public buildings are huge in size, natural ventilation effect is often not good, and natural ventilation depends on weather conditions, so that natural ventilation cannot effectively circulate air in the internal space, and thus, existing public buildings are usually provided with a fresh air system for actively conveying fresh air outside the building into the building to improve air quality in the internal space.
The fresh air system is generally adopted in public buildings and is more and more widely adopted in residential buildings in recent years so as to improve the air quality in the living environment.
The fresh air system is a set of independent air processing system consisting of an air supply system and an air return system and is divided into a pipeline type fresh air system and a non-pipeline type fresh air system. The pipeline type fresh air system consists of a fresh air fan and pipeline accessories, fresh outdoor air is introduced into a room through the fresh air fan, and residual dirty air in the room is discharged through a pipeline; the ductless fresh air system is composed of a fresh air blower, and fresh outdoor air is introduced into the room by the fresh air blower. Relatively speaking, the pipeline type fresh air system is more suitable for being used in industrial or large-area office areas, and the pipeline-free fresh air system is more suitable for being used in families due to convenient installation.
In order to ensure the air quality inside the building, the national standard GB50736-2012 stipulates the minimum fresh air volume provided by the fresh air system, and therefore the fresh air system in the existing building must guarantee that its operation meets the regulations of the national standard. Because the public buildings are dense in personnel, and the personnel number and density change rapidly and greatly, the existing fresh air system usually adopts an operation mode of fixed fresh air volume, the corresponding energy consumption for processing fresh air is also huge, the fixed fresh air volume is usually kept at the fresh air volume required by the corresponding standard under the condition of corresponding more people in the internal space, and the fresh air supply volume provided by the fresh air system is larger than the fresh air volume required by the people in the internal space under most conditions, so that the energy consumption is increased, and the energy waste is caused.
Under the condition that climate change becomes a global problem which needs to be faced by human beings at present, how to save energy and reduce greenhouse gas emission becomes a problem which needs to be solved in the whole society. Therefore, how to optimize and reduce the energy consumption of the fresh air system of the air conditioner becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a building air conditioner fresh air supply system, which comprises a controller and at least one air conditioner fresh air unit, wherein the air conditioner fresh air unit is respectively used for providing fresh air to a preset area in a building; each air-conditioning fresh air unit comprises a fresh air pipe, a return air pipe, an air processor and an air supply pipe, wherein the first end of the return air pipe is connected with the space in a building, the second end of the return air pipe is connected with the second end of the fresh air pipe and the first end of the air supply pipe, the first end of the fresh air pipe is connected with the atmosphere, the second end of the air supply pipe is connected with the space in the building, a fresh air regulating valve is arranged on the fresh air pipe, a return air regulating valve is arranged on the return air pipe, the air processor is at least partially arranged in the air supply pipe, an air feeder is arranged in the air processor, each air-conditioning fresh air unit is also provided with a carbon dioxide detection unit, a building space number measurement unit and an indoor and outdoor air temperature measurement unit, the carbon dioxide detection unit, the building space number measurement unit, the indoor and outdoor air temperature measurement unit, the air feeder, Fresh air regulating valve, return air governing valve with the controller links to each other, the corresponding forced draught blower of carbon dioxide detecting element and/or the interior space number of people measuring element of building and/or indoor outer air temperature measuring element's data control and/or fresh air regulating valve and/or return air governing valve of this air conditioner new trend unit can be based on to the controller.
Further, the carbon dioxide detecting unit includes a first sensor installed on the return air duct and a second sensor installed on the blast duct, and measures the content of carbon dioxide in a corresponding region at predetermined first time intervals.
Furthermore, the number of people measuring unit in the building comprises an image recognition device and/or a number of people counter, the image recognition device is used for shooting, recognizing and counting the number of people and the distribution condition in the preset area corresponding to the air-conditioning fresh air unit, and the number of people counter is arranged at the inlet and outlet position of the preset area corresponding to the air-conditioning fresh air unit and acquires the number of people in the preset area corresponding to the air-conditioning fresh air unit by detecting the data of people entering and exiting.
Furthermore, the fresh air regulating valve and the return air regulating valve are electric regulating valves, the opening degree of the valves can be regulated in a discrete regulating mode or a continuous regulating mode, and the controller controls the fresh air regulating valve and the return air regulating valve in a wired or wireless mode.
Further, the indoor and outdoor air temperature measuring unit comprises an indoor temperature sensor and an outdoor temperature sensor, the indoor temperature sensor is installed on the air return pipe, the outdoor temperature sensor is installed on the outdoor fresh air opening, the indoor and outdoor air temperature measuring unit measures indoor and outdoor air temperatures in a mode of separating preset third time, and the controller controls the corresponding air feeder and/or fresh air regulating valve and/or return air regulating valve based on the indoor air temperature and the outdoor air temperature.
Further, the blower has a variable air volume adjusting valve which can adjust performance parameters of the blower in a discrete adjustment mode or a continuous adjustment mode, and the controller controls the blower in a wired or wireless mode. Alternatively, the controller may adjust the rotational speed of the blower and thus the power and volume of the blower.
Further, when the concentration of carbon dioxide detected by a first sensor of the first air-conditioning fresh air unit exceeds a first threshold value, the controller controls the opening of a return air regulating valve of the first air-conditioning fresh air unit to be reduced and/or the opening of a fresh air regulating valve of the first air-conditioning fresh air unit to be increased, and the power of a blower of the first air-conditioning fresh air unit is regulated according to the carbon dioxide concentration change rate detected by the first sensor and/or the carbon dioxide concentration change rate detected by a second sensor; when the carbon dioxide concentration that the first sensor of first air conditioner new trend unit detected is less than the second threshold value, the return air governing valve aperture increase of first air conditioner new trend unit and/or the new trend governing valve aperture of first air conditioner new trend unit of controller control reduce to the power of the forced draught blower of first air conditioner new trend unit is adjusted to the carbon dioxide concentration change rate that the second sensor that measures and/or the first sensor that measures according to first sensor.
Further, the controller adjusts the power of the blower of the first air conditioning fresh air unit based on the carbon dioxide concentration change rate measured by the first sensor and the carbon dioxide concentration measured by the second sensor by adopting PID adjustment.
Furthermore, the number of people in the area is counted by the number of people in the space in the building of the first air-conditioning fresh air unit in a mode of spacing preset second time, and the controller controls the opening degree of the fresh air regulating valve and/or the return air regulating valve of the first air-conditioning fresh air unit and/or the power of the blower of the first air-conditioning fresh air unit according to the measured data of the number of people and the designed relation curve between the number of people and the fresh air volume.
Further, the controller controls the air conditioning fresh air unit of one area in a lead adjustment mode based on the number of people in the other area based on the flow conditions of people in at least two adjacent areas under a preset condition.
Further, the preset condition is a peak condition or a trough condition of the number of people in a preset time, the peak condition is that the personnel flow exceeds a third threshold value, and the trough condition is that the personnel flow is lower than a fourth threshold value.
Further, the predetermined first time is 10 minutes, 15 minutes, 30 minutes, 60 minutes, or 120 minutes, the predetermined second time is 10 minutes, 15 minutes, 30 minutes, 60 minutes, or 120 minutes, and the predetermined third time is 10 minutes, 15 minutes, 30 minutes, 60 minutes, or 120 minutes.
The implementation of the invention has the following beneficial effects: according to the fresh air system for the building, the space of the building according to the fresh air service is partitioned and numbered, the carbon dioxide content and/or the number of people of the air in each area are monitored in real time, and the corresponding air conditioning fresh air units are controlled, so that the fresh air quantity delivered by each air conditioning fresh air unit can be matched with the fresh air demand in the area in real time, the requirements of national standards can be met, the energy consumption of the fresh air system can be reduced, and the energy utilization efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a frame diagram of a fresh air system for a building according to the present invention.
Wherein the reference numerals are: 1. a return air duct; 2. an air supply pipe; 3. a fresh air duct; 4. a pedestrian passageway; 5. a fresh air regulating valve; 6. an air return regulating valve; 7. a blower; a first sensor; 9. a second sensor; 10. an air handler.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In order to solve the above problems, as shown in fig. 1, the present invention provides a fresh air supply system for a building air conditioner, which is used for supplying fresh air to a space in a building. The fresh air system comprises a controller and at least one air conditioner fresh air unit; the interior of the building is divided into a plurality of regions according to space and structural layout, the number of the air-conditioning fresh air units preferably corresponds to the number of the regions in the building, each region is provided with one air-conditioning fresh air unit, and each air-conditioning fresh air unit independently conveys fresh air to the corresponding region. For example, each room may be configured with a separate air conditioning fresh air unit according to the distribution of the rooms, or for a large independent space, such as a station hall, a concert hall, a stadium, etc., the large space may be virtually divided into a plurality of areas, and one air conditioning fresh air unit is respectively arranged in each area.
Fig. 1 shows only three air conditioning fresh air units, which each supply fresh air to a corresponding area individually. However, the present invention is not limited to dividing the space in the building into three regions, and the space may be divided into any number of regions according to the specific situation in the building.
As shown in fig. 1, for the first air-conditioning fresh air unit, the second air-conditioning fresh air unit and the third air-conditioning fresh air unit, each air-conditioning fresh air unit comprises a fresh air pipe 3, a return air pipe 1 and an air supply pipe 2, a first end of the return air pipe 1 is connected with the space in the building, a second end of the return air pipe 1 is connected with a second end of the fresh air pipe 3 and a first end of the air supply pipe 2, a first end of the fresh air pipe 3 is connected with the atmosphere, and a second end of the air supply pipe 2 is connected with the space in the building. The fresh air pipe 3 is provided with a fresh air regulating valve 4, the return air pipe 1 is provided with a return air regulating valve 6, the blast pipe 2 is provided with an air treatment device 10, and the air treatment device 10 comprises a blower 7. The return air pipe 1 of each air-conditioning fresh air unit can be selectively connected with a return air main pipe in a building which is not shown, and the fresh air pipe 3 of each air-conditioning fresh air unit can be selectively connected with a fresh air main pipe in a building which is not shown, so that the structure can ensure that the air in each area can be partially discharged into the atmosphere through the return air main pipe, and can partially receive fresh air from the fresh air main pipe, thereby completing the replacement of the air in the area, discharging the air with higher carbon dioxide concentration in the area and receiving the fresh air with lower carbon dioxide concentration and higher oxygen concentration.
The opening degrees of the fresh air regulating valve 4 and the return air regulating valve 6 can be adjusted, and the fresh air regulating valve 4 and the return air regulating valve 6 are preferably electric regulating valves and can be adjusted in a discrete adjusting mode or a continuous adjusting mode. The blower 7 comprises a motor and a fan, and the fan is driven by the motor to convey air to a corresponding area and thereby serve as at least part of power of air circulation in the area; the output power of the blower 7 can be adjusted, preferably by adjusting the rotational speed of the motor of the blower 7. The controller controls the fresh air regulating valve 5, the return air regulating valve 6 and the blower 7 in a wired or wireless manner.
Each air conditioner fresh air unit is also provided with a carbon dioxide detection unit and a space number measuring unit in the building. The carbon dioxide detection unit is used for detecting the concentration of carbon dioxide in air flowing through the air conditioning fresh air unit, and the space number measuring unit in the building is used for detecting the number of people in the area corresponding to the air conditioning fresh air unit.
As shown in fig. 1, the carbon dioxide detecting unit, the building interior space number measuring unit, the blower 7, the fresh air regulating valve 5 and the return air regulating valve 6 of each air conditioning fresh air unit are all connected with the controller, and the controller can control the blower 7 and/or the fresh air regulating valve 5 and/or the return air regulating valve 6 based on the data of the carbon dioxide detecting unit and/or the building interior space number measuring unit of the air conditioning fresh air unit.
In order to obtain the carbon dioxide concentration of the air flowing through the air conditioning fresh air unit, as shown in fig. 1, the carbon dioxide detection unit of each air conditioning fresh air unit includes a first sensor 8 and a second sensor 9, and both the first sensor 8 and the second sensor 9 are carbon dioxide concentration detection sensors. The first sensor 8 is installed on the return air duct 1, the second sensor 9 is installed on the blast duct 2, and the first sensor 8 and the second sensor 9 are respectively used for detecting the concentration of carbon dioxide at the installation position. In order to be able to acquire carbon dioxide concentration data in real time, the carbon dioxide detection unit measures the content of carbon dioxide in the corresponding region at predetermined first time intervals. The predetermined first time may be a length of time that is optional depending on the specific circumstances of the building and the circumstances of the person, such as 10 minutes, 15 minutes, 30 minutes, 60 minutes, or 120 minutes.
The fresh air supply system of the air conditioner for the building can control the running state of the fresh air unit of the air conditioner by detecting the concentration of carbon dioxide. It is known that the concentration of carbon dioxide in fresh air outside buildings is about 400ppm, i.e. 0.04%; the carbon dioxide concentration in the air of a plurality of areas in the building can have a designed appropriate range, the designed range can be determined according to the specific condition of the building and the specific condition of the personnel flow, for example, the designed range can be 600ppm, 700ppm, 800ppm, 900ppm or 1000ppm, the carbon dioxide concentration of the indoor air is generally not higher than 1000ppm, and the discomfort such as stuffiness and inattention can occur under the concentration condition. The work of the fresh air unit of the air conditioner can be correspondingly controlled by detecting the actual carbon dioxide concentration and comparing the actual carbon dioxide concentration with the design range.
The suitable ranges set for the respective regions may be the same or different. For example, for an area with a small flow of people and infrequent activities, the appropriate range for the carbon dioxide concentration may be set higher; and for the area with large people flow and frequent activity, the proper range of the carbon dioxide concentration should be set to be lower.
Here, taking the first air-conditioning fresh air unit as an example, the suitable range of the carbon dioxide concentration is set to be 500ppm to 800 ppm. The first sensor 8 and the second sensor 9 of the carbon dioxide detection unit of the first air-conditioning fresh air unit are connected with the controller, when the carbon dioxide concentration detected by the first sensor 8 received by the controller exceeds a first threshold value, namely 800ppm, the carbon dioxide concentration in the area is represented to be high at the moment, and accordingly the controller controls the opening degree of the return air regulating valve 6 of the first air-conditioning fresh air unit to be reduced or controls the opening degree of the fresh air regulating valve 5 of the first air-conditioning fresh air unit to be increased or controls the opening degree of the return air regulating valve 6 of the first air-conditioning fresh air unit and the opening degree of the fresh air regulating valve 5 to be increased at the same time. Therefore, the return air in the area can be more discharged and less returned to the area, and the fresh air entering the area is more, so that the content of the fresh air conveyed to the area is improved, and the concentration of carbon dioxide can be reduced.
When the air conditioning fresh air unit continuously conveys fresh air to the region for a certain time, the concentration of carbon dioxide in the region is correspondingly reduced. When the concentration of carbon dioxide detected by the first sensor 8 of the first air-conditioning fresh air unit is lower than a second threshold value, namely 500ppm, the controller controls the opening of the return air regulating valve 6 of the first air-conditioning fresh air unit to increase and/or controls the opening of the fresh air regulating valve 5 of the first air-conditioning fresh air unit to decrease.
Further preferably, for a suitable range of carbon dioxide concentration of 500ppm to 800ppm, in which a plurality of warning values, such as 600ppm, 650ppm, 700ppm, and 750ppm, can be set for the detected carbon dioxide concentration, the controller adjusts the return air regulating valve 6 and the fresh air regulating valve 5 at different opening degrees for each warning value. Here, the corresponding relationship between the early warning value and the opening degree of the regulating valve is preferably set in a linear proportion manner, that is, the higher the early warning value is, the closer to the first threshold value is, the larger the opening degrees of the return air regulating valve 6 and the fresh air regulating valve 5 are, that is, the lower the early warning value is, the farther from the first threshold value is, and the smaller the opening degrees of the return air regulating valve 6 and the fresh air regulating valve 5 are accordingly.
Furthermore, in the adjusting process, the power of the blower of the first air conditioning fresh air unit is adjusted by calculating the carbon dioxide concentration change rate measured by the first sensor 8 and/or the carbon dioxide concentration change rate measured by the second sensor 9 in a PID (proportion integration differentiation) adjusting mode, so that the condition that the carbon dioxide concentration change fluctuation is large due to the over-adjustment of the air conditioning fresh air unit can be prevented; excessive adjustment also causes the energy consumption of the fresh air system to be increased, which is not favorable for economical and efficient operation. For example, although the carbon dioxide concentration measured by the first sensor 8 is still high, if the rate of change of the decrease in the carbon dioxide concentration measured by the first sensor 8 is large at this time, that is, in response to the rate of decrease in the carbon dioxide concentration being fast at this time, the controller controls the power of the blower to be reduced accordingly, so that the carbon dioxide concentration in the air in the area can be smoothly controlled to return to the normal value. On the contrary, although the carbon dioxide concentration measured by the first sensor 8 is still low, if the change rate of the rise of the carbon dioxide concentration measured by the first sensor 8 is large at this time, that is, the carbon dioxide concentration rise speed is fast at this time, the controller controls the power of the blower to be increased accordingly, so that the rapid rise trend of the carbon dioxide concentration in the air in the area can be quickly and effectively suppressed, and the carbon dioxide concentration in the air in the area can be smoothly controlled to return to the normal value.
In addition to the above-mentioned manner of detecting carbon dioxide concentration to adjust the fresh air system, the fresh air system can also be adjusted by the manner of detecting the personnel flow/personnel quantity in the area. The indoor space people number measuring unit of each air conditioning fresh air unit comprises an image recognition device and/or a people number counter which are not shown in fig. 1, wherein the image recognition device is used for shooting, recognizing and counting people numbers and distribution conditions in a preset area corresponding to the air conditioning fresh air unit, the image recognition device can be a visual camera, a camera or an infrared camera, and the people number in the area can be recognized through shot pictures. The number counter is arranged at the inlet and outlet positions of the area corresponding to the air-conditioning fresh air unit and is used for acquiring the number of people in the preset area corresponding to the air-conditioning fresh air unit and the change rate of the number of people by detecting the entering and exiting data of the people. The image recognition method and the counting method are conventional methods in the art, and are not described herein.
Taking the first air conditioning fresh air unit in fig. 1 as an example, the number of people in the building of the first air conditioning fresh air unit is counted by the number of people measuring unit at a predetermined second time, wherein the predetermined second time can be a time length which is optional according to the specific situation of the building and the situation of people, such as 10 minutes, 15 minutes, 30 minutes, 60 minutes or 120 minutes.
Setting the fresh air quantity required by a single person correspondingly according to the motion state of each person in the corresponding area; for example, when the person in the area is in a state of being artificially at rest or in a state of being slowly moved, the fresh air volume required by each person corresponding thereto may be set to be low, and when the person in the area is being artificially vigorously moved, the fresh air volume required by each person corresponding thereto may be set to be high. The space number measuring unit in the building can identify and distinguish the corresponding number of people in different motion states in the area, and therefore the total amount of fresh air corresponding to all people in the area can be calculated.
The controller is used for calculating the corresponding required fresh air volume according to the number and the motion state of the personnel in the corresponding area measured by each air-conditioning fresh air unit, and controlling the opening degree of a fresh air regulating valve 5 and/or a return air regulating valve 6 of the first air-conditioning fresh air unit and/or the power of a blower 7 based on the required fresh air volume.
Likewise, in the mode of monitoring the number of people, PID regulation is preferably introduced, and the power of the blower 7 of the first air conditioning fresh air unit is regulated by calculating the change rate of the number of people in the area and/or the change rate of the number of people in different movement states, so that the phenomenon of over-regulation of the air conditioning fresh air unit can be prevented, and the problem of increased energy consumption of the fresh air system is avoided. For example, although the number of people in the area is unchanged, when a part of people change from a sitting state to a violent movement state and the change rate is high, the controller controls the power of the blower 7 to be increased, so that the air replacement speed in the area is increased, and the increased fresh air volume requirement is met, and thus the air conditioning fresh air unit can be quickly and timely adjusted according to the conditions of the people, so that the air conditioning fresh air unit can meet the fresh air requirement of the people in the area, can also run in a high-efficiency state, reduce energy consumption and improve efficiency.
Furthermore, for the people in the building, sometimes a large and concentrated amount of one wave or a significantly sparse amount of one wave may flow from one area to another, that is, a peak condition or a trough condition of the number of people in the pedestrian passageway 4 as shown in fig. 1 may occur, and such a peak or trough condition may be transferred from one area to another, thereby causing rapid and drastic fluctuation of the fresh air demand in the area through which the wave causes great disturbance to the control of the air conditioning fresh air unit.
For peak conditions or trough conditions of the number of people, the peak conditions may be considered as a people flow exceeding a third threshold, such as 20 people, 30 people, 50 people or 100 people in the population, and the trough conditions are considered as a people flow below a fourth threshold, such as 2 people, 3 people or 5 people sparse in the people flow.
The controller can control the air conditioning fresh air unit of another area in an advance adjusting mode according to the number of people or the change rate of the number of people in one area based on the flow conditions of people in at least two adjacent areas, including the flow conditions monitored in real time or predicted flow conditions based on historical data and real-time monitoring data, under the condition of the wave peaks or the wave troughs, so that the air conditioning fresh air unit can adjust the air in the other area in advance to deal with the wave peaks or the wave troughs flowing by the coming people, and the severe fluctuation of the air conditioning fresh air unit of the other area is avoided, the power fluctuation of the air conditioning fresh air unit is large, and the energy waste is caused by low efficiency. For example, as shown in fig. 1, when the controller monitors that a person with a large wave concentration moves from the area of the first air-conditioning fresh air unit to the area of the second air-conditioning fresh air unit, although the number of persons in the area corresponding to the person with the large wave concentration monitored by the second air-conditioning fresh air unit does not change at this time, the controller still controls the second air-conditioning fresh air unit to increase the output fresh air volume thereof, especially to increase the output fresh air volume thereof relatively quickly, so that when the person with the large wave concentration reaches the area of the second air-conditioning fresh air unit, the carbon dioxide content and the oxygen content of the air in the area are relatively low and relatively high, and the impact demand of the concentrated stream of people can be effectively met. Additionally, the controller can also adjust the first air-conditioning fresh air unit in advance according to the condition that the concentrated people flow leaves the corresponding area of the first air-conditioning fresh air unit, so that the power of the first air-conditioning fresh air unit is reduced earlier, and the energy consumption is saved.
Of course, more than the second air conditioner fresh air unit can be adjusted in advance according to the personnel flow condition of the adjacent first air conditioner fresh air unit, and the third air conditioner fresh air unit and the fourth air conditioner fresh air unit can also be adjusted in advance according to the personnel flow condition of the nonadjacent first air conditioner fresh air unit.
The fresh air supply system of the air conditioner for the building can independently and respectively adjust the fresh air supply quantity by detecting the carbon dioxide concentration or the number of people in the detection area, and also can adjust the fresh air supply quantity by simultaneously detecting the carbon dioxide concentration and the number of people in the area. When the two control modes act simultaneously, the control factors of the two control modes for the fresh air regulating valve, the return air regulating valve and the air feeder can adopt a weighted average mode to control the fresh air regulating valve, the return air regulating valve and the air feeder, and the coefficients of the control factors can be selected arbitrarily according to the conditions.
In addition, each air conditioner new trend unit still includes indoor outer air temperature measuring unit, indoor outer air temperature measuring unit includes indoor temperature sensor and outdoor temperature sensor, indoor temperature sensor installs on the return air pipe, outdoor temperature sensor installs on outdoor fresh air inlet, indoor outer air temperature measuring unit measures indoor, outdoor air temperature with the mode of the predetermined third time of interval. Wherein the predetermined third time may be a time length that is optional according to the specific situation of the building and the situation of the person, such as 10 minutes, 15 minutes, 30 minutes, 60 minutes or 120 minutes. And the controller controls the corresponding blower and/or fresh air regulating valve and/or return air regulating valve based on the indoor air temperature and the outdoor air temperature. Therefore, the fresh air exchange rate in each area can be additionally and correctively controlled according to the indoor and outdoor temperature difference conditions.
The implementation of the invention has the following beneficial effects: according to the air conditioner fresh air supply system for the building, the space of the building according to fresh air service is partitioned and numbered, the carbon dioxide content and/or the number of people of the air in each area are monitored in real time, and the corresponding air conditioner fresh air units are controlled, so that the fresh air quantity delivered by each air conditioner fresh air unit can be matched with the fresh air demand in the area in real time, the requirements of national standards can be met, the energy consumption of a fresh air system can be reduced, and the energy utilization efficiency is improved.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (12)
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| CN115574432A (en) * | 2022-10-11 | 2023-01-06 | 珠海格力机电工程有限公司 | A control method for intelligently adjusting fresh air volume, an air conditioner, and a storage medium |
| CN115638475A (en) * | 2022-10-14 | 2023-01-24 | 青岛海尔空调器有限总公司 | Intelligent household equipment, intelligent household equipment control method and intelligent household system |
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| CN116697548A (en) * | 2023-08-10 | 2023-09-05 | 江苏悦岩医学科技有限公司 | Be applied to purification air conditioning unit and purification air conditioning unit intelligent control system of hospital |
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