CN114047304B - Fresh air system air detection method and device - Google Patents
Fresh air system air detection method and device Download PDFInfo
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- CN114047304B CN114047304B CN202210030275.4A CN202210030275A CN114047304B CN 114047304 B CN114047304 B CN 114047304B CN 202210030275 A CN202210030275 A CN 202210030275A CN 114047304 B CN114047304 B CN 114047304B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
Abstract
The invention discloses a fresh air system air detection method and a device, wherein the method comprises detection environment reconstruction and dynamic detection; wherein the detection environment reconstruction comprises: s101, a sampling pipeline communicated with the air outlet side of a branch of a fresh air system is built, and an air accumulation cavity with the sectional area larger than that of other pipe sections of the pipeline is formed in the sampling pipeline; s102, configuring an opening and closing function at an inlet end of a sampling pipeline; s103, pre-installing an air detection module on the outlet side of the air accumulation cavity of the sampling pipeline; the dynamic detection, comprising: s201, determining a sampling initial node at a preset sampling frequency F; s202, starting a sampling pipeline inlet at a sampling starting node, and closing the sampling pipeline after timing duration T1; s203, recording data sampled and output by the air detection module at T2 time after the sampling pipeline inlet is opened as sample data; wherein T2 > T1. The method and the device have the advantages that the effect of assisting users in better supervision and regulation of the fresh air system is achieved.
Description
Technical Field
The application relates to a fresh air system, in particular to an air detection method and device of the fresh air system.
Background
The fresh air system is a system for filtering and purifying outdoor air and then sending the air into the room to replace the indoor atmospheric environment. Compared with an air filter, the air purifier has higher purification rate and is more suitable for wide-range air purification.
The patent with publication number CN109506326A discloses an air detection device and a control method for a fresh air system, which includes at least one air detector, at least one fresh air fan and a system host, wherein a controller local area network is formed among the system host, the air detector and the fresh air fan, and is used for receiving air quality information acquired by the air detector and processing the air quality information into a control signal to control the operation of the fresh air fan; the air detector is provided with a unique SSID and a unique password, and the air detector and the fresh air machine are provided with communication modules for data exchange between corresponding devices. The device can realize intelligent linkage with new fan, and automatic control new fan's start-up and operation do not need manual control, can adjust new fan according to current air condition.
The above-mentioned scheme that provides one kind and can adjust new trend system according to indoor air quality, new trend system's result of use not only reflects in the operation process of automatic regulating system and carries out energy-conservation, still lies in the quality of new trend, and known domestic air quality sensor (or called PM2.5 sensor) mainly measures based on laser scattering principle, but equipment environment such as new trend system, air cleaner is applied to this type of sensor, and the installation requirement is: the fan can not be installed before, after, etc., it is easily disturbed and detects the trouble by the quick circulation air current, therefore this application proposes a new technical scheme.
Disclosure of Invention
In order to better assist a user in supervising and controlling the fresh air system, the application provides a fresh air system air detection method and device.
In a first aspect, the application provides a fresh air system air detection method, which adopts the following technical scheme:
an air detection method of a fresh air system comprises detection environment reconstruction and dynamic detection; wherein the detection environment reconstruction comprises:
s101, a sampling pipeline communicated with the air outlet side of a branch of a fresh air system is built, and an air accumulation cavity with the sectional area larger than that of other pipe sections of the pipeline is formed in the sampling pipeline;
s102, configuring an opening and closing function at an inlet end of a sampling pipeline;
s103, pre-installing an air detection module on the outlet side of the air accumulation cavity of the sampling pipeline;
the dynamic detection, comprising:
s201, determining a sampling initial node at a preset sampling frequency F;
s202, starting a sampling pipeline inlet at a sampling starting node, and closing the sampling pipeline after timing duration T1;
s203, recording data sampled and output by the air detection module at T2 time after the sampling pipeline inlet is opened as sample data; wherein T2 > T1.
Optionally, the detecting the environmental reconstruction further includes:
establishing a bypass for switching the atmosphere of the sampling pipeline, wherein the bypass takes a purification space of a branch corresponding to the fresh air system as an air inlet space, takes a communication section of the sampling pipeline and the fresh air system branch as an air outlet area, and is provided with an opening and closing function for an air outlet end of the bypass;
the dynamic detection comprises:
when the inlet of the sampling pipeline is closed, the bypass air outlet end is opened; and when the inlet of the sampling pipeline is opened, the bypass air outlet end is closed.
Optionally, the dynamic detection includes: and recording the T3 time after the inlet of the sampling pipeline is closed, wherein the sampling data output by the air detection module is an environment sample, and T2 < T3 < the period corresponding to the sampling frequency F.
In a second aspect, the present application provides a fresh air system air detection device, which adopts the following technical scheme:
the utility model provides a new trend system empty gas detection surveys device, includes:
the inlet end of the sampling pipeline is communicated with the air outlet side of the fresh air system branch, and an air accumulation cavity with the sectional area larger than that of other pipeline sections of the sampling pipeline is formed at one section of the sampling pipeline away from the inlet;
the electric control valve group comprises a plurality of electric control valves which are respectively arranged at the inlets of the sampling pipelines;
the air detection module comprises a PM2.5 sensor arranged on the outlet side of the air accumulation cavity, and the PM2.5 sensor is used for detecting and outputting the air quality;
and the controller is connected with the electric control valve group and the air detection module, is used for receiving and responding to the feedback signal and outputting a control signal, and is also used for performing data interaction with the fresh air system/the designated terminal.
Optionally, the sampling pipeline is communicated with the air outlet side communicating section of the fresh air system branch, an air inlet end of the bypass is communicated with the indoor communicated with the corresponding fresh air system branch, and an electric control valve is installed at an air outlet end of the bypass.
Optionally, the controller is configured to: the sampling device is used for controlling the opening of the electric control valve of the inlet of the sampling pipeline at a sampling frequency F, the opening and closing states of the bypass electric control valve on the side are opposite to that of the bypass electric control valve on the side, the sampling device lasts for a time T1, and sampling data output by the air detection module is recorded as sample data after the time T2.
Optionally, the controller is further configured to: and the electronic control valve for the inlet of the sampling pipeline is closed, and the sampling data output by the air detection module is recorded as an environmental sample at the time T3.
Optionally, a plurality of sampling pipeline outlet ends are communicated with the same balance pipeline, and an adaptive unpowered hood is installed at the air outlet end of the balance pipeline.
Optionally, an electromagnet is arranged in the unpowered funnel cap, a magnetic strip matched with the electromagnet is fixed on a rotating shaft of the unpowered funnel cap, the electromagnet is connected to a controller, and the controller is configured to: and the electromagnet is closed after the electric control valve at the inlet of the sampling pipeline is closed.
Optionally, the wind accumulation cavity is internally provided with a wind impact structure, the wind impact structure comprises two pairs of drainage arc plates, the inner arcs of one pair of drainage arc plates are opposite, the other pair of drainage arc plates are located between the drainage arc plates, and the inner arcs deviate from each other.
In summary, the present application includes at least one of the following beneficial technical effects: can be through the sampling pipeline of intercommunication new trend system branch road outlet side to the sampling of the gas sample in the branch road, and the pipeline is closed after the sampling, avoids the fast flow new trend to continue to rush into the sampling pipeline, makes the gas flow velocity in the follow-up ponding cavity too fast and influence the air quality and detect, uses this application promptly to realize that the air of new trend system branch road outlet side is the quality detection to better supervision, regulation and control new trend system.
Drawings
FIG. 1 is a schematic view of the installation layout of the present application;
fig. 2 is a schematic diagram of the control structure of the device of the present application.
Description of reference numerals: 1. a sampling pipeline; 11. an air accumulation cavity; 2. an electric control valve group; 3. an air detection module; 4. a controller; 5. a bypass; 6. a balance pipeline; 7. an unpowered hood; 8. an electromagnet.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses new trend system air detection device.
Referring to fig. 1 and 2, the fresh air system air detection device includes:
the sampling pipeline 1 is formed by laying a plastic pipeline/corrugated pipe, the end head serving as an inlet is communicated with the air outlet side of a branch of a fresh air system by a flange structure, and the other end of the sampling pipeline is communicated with the outside atmosphere; an air accumulation cavity 11 with the sectional area exceeding other pipe sections of the sampling pipeline is formed in the sampling pipeline, and the air accumulation cavity 11 is an inner cavity of a sealing cylinder;
the electronic control valve group 2 comprises a plurality of electronic control valves which are respectively arranged at the inlets of the sampling pipelines 1, wherein the electronic control valves can select electromagnetic valves;
the air detection module 3 comprises a PM2.5 sensor arranged on the outlet side of the air accumulation cavity, and the PM2.5 sensor is used for detecting and outputting the air quality; it is understood that the sensor in this embodiment is of the type based on the principle of light scattering as described in the background, i.e. the sensor sucks in sample air, and the measurement result of sample light scattering is converted into an electrical signal to realize measurement;
the controller 4 comprises a control circuit board integrating a CPU, an A/D conversion and a relay output, is connected with the electric control valve group 2 and the air detection module 3, is used for receiving and responding to a feedback signal and outputting a control signal, and is also used for performing data interaction with a fresh air system/a designated terminal; in this embodiment, the designated terminal may be a mobile phone of an operation and maintenance worker of the fresh air system or a computer of a machine room; it will be appreciated that the communication units are correspondingly configured as described above.
The air detection method of the fresh air system based on the device is specifically explained in the next embodiment, and is not described herein again.
This device still includes bypass 5, and bypass 5 and above-mentioned sampling pipeline 1 are the tubule, and the pipe diameter should not be too big (for example r is 20-35 mm) to lead into too big amount of wind when avoiding the intercommunication new trend branch road, and can reduce the cost.
The air inlet end of the bypass 5 is close to the air inlet end of the sampling pipeline 1 and is positioned behind the air inlet end of the sampling pipeline 1. The other end of the bypass 5 is communicated with the indoor environment (A-1 in the figure) corresponding to the branch of the fresh air system. The bypass 5 is normally closed, and when the inlet of the sampling pipeline 1 is closed, the bypass 5 is opened.
On one hand, the bypass 5 is used for providing supplementary air flow for the sampling pipeline 1, so that the sample air in the sampling pipeline 1 can flow to the air accumulation cavity conveniently; on the other hand, the air detection module 3 of the device is fully utilized, so that the detection data can also be used as the reference of air detection of a fresh air system.
The device also comprises a balance pipeline 6, and the outlet end of each sampling pipeline is communicated with the balance pipeline 6. One end of the balance pipeline 6 is closed, and an adaptive unpowered hood 7 is installed at one end of the balance pipeline as an outlet.
An electromagnet 8 connected to the controller 4 is installed in the unpowered hood 7, and the electromagnet 8 is positioned on a bracket welded outside a bearing seat of the hood rotating shaft; the magnetic strip is fixed outside the blast cap rotating shaft. When the electromagnet 8 is turned on, it attracts the magnetic strip, which hinders the unpowered hood from rotating.
The unpowered hood 7 is static in a normal state; when the inlet of the sampling pipeline 1 is closed and the outlet of the bypass 5 is opened, the electromagnet 8 is closed, namely the unpowered hood 7 rotates normally. The unpowered funnel cap 7 is mainly used for providing air suction power to guide indoor air flow into the sampling pipeline 1 when the sampling pipeline 1 is communicated with the indoor through the bypass 5. If the cost is not considered, the device can be provided with a motor drive for the unpowered hood 7, namely, an active air exhaust mechanism is changed.
To this device, though through the increase of volume from sampling pipeline 1 to ponding cavity 11, including the bending type of pipeline can be to coming from the air current deceleration of new trend system branch road, but for the influence of the quick air current of minimize, this device still sets up wind in ponding cavity 11 and dashes the structure, and wind dashes the structure and includes two pairs of drainage arc boards, and the inner arc of a pair of drainage arc board is relative, and another pair of drainage arc board is located between the aforesaid drainage arc board, and the inner arc deviates from each other. The airflow enters the air accumulation cavity 11, is separated by the drainage arc plate, and generates opposite impact on the outlet side of the drainage arc plate with the opposite inner arc, so that the gas is relatively smooth; the drainage arc plate is fixed on the inner wall of the wind accumulation cavity 11.
The embodiment of the application discloses a fresh air system air detection method.
The air detection method of the fresh air system comprises the following steps: including detection environment reconstruction and dynamic detection. Wherein, the detection environment is rebuilt, namely the device is installed and constructed.
The dynamic detection comprises the following steps:
determining a sampling starting node at a preset sampling frequency F (such as 30 minutes/time);
starting an inlet of a sampling pipeline 1 at a sampling starting node, and closing the sampling pipeline after timing duration T1;
recording data sampled and output by the air detection module 3 at T2 time after the inlet of the sampling pipeline 1 is opened as sample data; wherein T2 > T1; and the number of the first and second groups,
when the inlet of the sampling pipeline 1 is closed, the air outlet end of the bypass 5 is opened; otherwise, the inlet end of the bypass 5 is closed.
It can be understood that the T1 is calculated and determined according to the branch wind speed of the fresh air system and the length from the sampling pipeline 1 to the air accumulation cavity 11, so as to ensure that the gas sample during detection is the sample of the branch of the fresh air system; t2 is the estimated time taken for the inlet of the sampling pipe 1 to close and the bypass 5 to open, but before the bypass 5 opens to the air displacement plenum 11 + T1. T1, T2 and T3 are all preset parameters.
According to the above, the flow rate of the gas sample detected by the air detection module 3 is relatively gentle and is the gas of the branch of the fresh air system, so that the detection result is the air quality detection result of the fresh air system; meanwhile, on the basis, a PM2.5 sensor or other air quality sensors based on the light scattering principle with higher precision can be adopted, so that the detection effect is better.
The dynamic detection of the method comprises the following steps: and recording the T3 time after the inlet of the sampling pipeline is closed, wherein the sampling data output by the air detection module is an environment sample, and T2 < T3 < the period corresponding to the sampling frequency F.
It can be understood that, the above-mentioned T3 is the time of bypass 5 drainage gas replacing gas in the ventilation cavity 11, that is to say, according to the above-mentioned content, can detect the indoor environment that the bypass 5 corresponds the intercommunication for consider the purifying effect of new trend system.
After the inlet of the sampling pipeline is closed, the controller 4 controls the electromagnet 8 to be closed, so that the unpowered hood rotates, and the bypass 5 is guided to extract air from the room and send the air into the sampling pipeline 1, and the using effect is guaranteed.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. A fresh air system air detection method is characterized in that: the method comprises the steps of detection environment reconstruction and dynamic detection; wherein the detection environment reconstruction comprises:
s101, a sampling pipeline communicated with the air outlet side of a branch of a fresh air system is built, and an air accumulation cavity with the sectional area larger than that of other pipe sections of the pipeline is formed in the sampling pipeline;
s102, configuring an opening and closing function at an inlet end of a sampling pipeline;
s103, pre-installing an air detection module on the outlet side of the air accumulation cavity of the sampling pipeline;
the dynamic detection, comprising:
s201, determining a sampling initial node at a preset sampling frequency F;
s202, starting a sampling pipeline inlet at a sampling starting node, and closing the sampling pipeline after timing duration T1;
s203, recording data sampled and output by the air detection module at T2 time after the sampling pipeline inlet is opened as sample data; wherein T2 > T1; the detection environment reconstruction further includes:
establishing a bypass for switching the atmosphere of the sampling pipeline, wherein the bypass takes a purification space of a branch corresponding to the fresh air system as an air inlet space, takes a communication section of the sampling pipeline and the fresh air system branch as an air outlet area, and is provided with an opening and closing function for an air outlet end of the bypass;
the dynamic detection comprises:
when the inlet of the sampling pipeline is closed, the bypass air outlet end is opened; when the inlet of the sampling pipeline is opened, the bypass air outlet end is closed; the dynamic detection comprises: and recording the T3 time after the inlet of the sampling pipeline is closed, wherein the sampling data output by the air detection module is an environment sample, and T2 < T3 < the period corresponding to the sampling frequency F.
2. The utility model provides a new trend system empty gas detection surveys device which characterized in that includes:
the inlet end of the sampling pipeline is communicated with the air outlet side of the fresh air system branch, and an air accumulation cavity with the sectional area larger than that of other pipeline sections of the sampling pipeline is formed at one section of the sampling pipeline away from the inlet;
the electric control valve group comprises a plurality of electric control valves which are respectively arranged at the inlets of the sampling pipelines;
the air detection module comprises a PM2.5 sensor arranged on the outlet side of the air accumulation cavity, and the PM2.5 sensor is used for detecting and outputting the air quality;
the controller is connected with the electric control valve group and the air detection module, is used for receiving and responding to the feedback signal and outputting a control signal, and is also used for performing data interaction with a fresh air system/a designated terminal; a bypass is communicated with the connection section of the sampling pipeline and the air outlet side of the branch of the fresh air system, the air inlet end of the bypass is communicated with the chamber communicated with the corresponding branch of the fresh air system, and the air outlet end of the bypass is provided with an electric control valve; the controller is configured to: the sampling device is used for controlling the opening and closing of an electric control valve of a sampling pipeline inlet by sampling frequency F, the opening and closing state of a bypass electric control valve on the side is opposite to that of the bypass electric control valve on the side, the sampling device lasts for time T1, and sampling data output by the air detection module is recorded as sample data after time T2; the controller is further configured to: and recording the sampling data output by the air detection module as an environment sample at the time of T3 after the electric control valve at the inlet of the sampling pipeline is closed, wherein T2 < T3 < the period corresponding to the sampling frequency F.
3. The fresh air system air detection device of claim 2, wherein: a plurality of sampling pipeline outlet ends are communicated with the same balance pipeline, and the air outlet end of the balance pipeline is provided with an adaptive unpowered hood.
4. The fresh air system air detection device of claim 3, wherein: the interior electro-magnet that sets up of unpowered hood, and the pivot of unpowered hood is fixed with the magnetic stripe of cooperation electro-magnet, the electro-magnet is connected in the controller, the controller is configured into: and the electromagnet is closed after the electric control valve at the inlet of the sampling pipeline is closed.
5. The fresh air system air detection device of claim 2, wherein: the utility model discloses a drainage arc plate, including ponding wind cavity, wind dashes the structure and includes two pairs of drainage arc plates, and the inner arc of a pair of drainage arc plate is relative, and another pair of drainage arc plate is located between the aforementioned drainage arc plate, and the inner arc deviates from each other.
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| CN202210030275.4A CN114047304B (en) | 2022-01-12 | 2022-01-12 | Fresh air system air detection method and device |
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Effective date of registration: 20230911 Address after: Room 302, Juxing Entrepreneurship Base, No. 8 Lujing Road, High tech Development Zone, Changsha City, Hunan Province, 410000 Patentee after: Hunan Xingpu Information Technology Co.,Ltd. Address before: 518000 8 floor of 2B, Wutong Industrial Park, Baoan District, Guangdong, Shenzhen. Patentee before: SHENZHEN SIMPUSUN INFORMATION TECHNOLOGY CO.,LTD. |