CN110966722A - BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment - Google Patents

BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment Download PDF

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CN110966722A
CN110966722A CN201910992818.9A CN201910992818A CN110966722A CN 110966722 A CN110966722 A CN 110966722A CN 201910992818 A CN201910992818 A CN 201910992818A CN 110966722 A CN110966722 A CN 110966722A
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air
real
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air inlet
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韩风毅
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Changchun Institute of Applied Chemistry of CAS
Changchun Institute Technology
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Changchun Institute of Applied Chemistry of CAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
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  • Mathematical Physics (AREA)
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  • Biomedical Technology (AREA)
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Abstract

The invention provides a foreign matter detection method of heating, ventilating, air conditioning and refrigerating equipment based on BIM, a 3D heating, ventilating and air conditioning system model constructed based on a building information model BIM, the relation of each device of the heating, ventilating, air conditioning and refrigerating device and the control influence object on the space position can be intuitively reflected, and through the calculation processor and the diagnosis processor, can judge whether the foreign matters on the equipment (a fan, a dust removal sterilizer and the like) which is easy to absorb the foreign matters in the heating, ventilation, air conditioning and refrigerating equipment reach the alarm degree, so that when the blockage occurs, the position of the blockage of the foreign matter can be found out from the huge heating, ventilating, air conditioning and refrigerating equipment intuitively and quickly, so as to clean or maintain timely and at fixed points, save time, reduce management difficulty and overhaul difficulty, but also can judge whether the dust removal sterilizer in each air inlet pipe breaks down, and prevent that the air that will not reach standard from being sent into indoor.

Description

BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment
Technical Field
The invention relates to the technical field of heating, ventilating, air conditioning and refrigerating equipment, in particular to a BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment.
Background
The heating, ventilating, air conditioning and refrigerating equipment refers to a system or related equipment which is responsible for heating, ventilating and air conditioning indoors. The heating, ventilating, air conditioning and refrigerating equipment is a household central air conditioner, has the greatest characteristic of being capable of creating a comfortable indoor environment. The common household split air conditioner can only solve the problems of cooling and heating, but cannot solve the air treatment process.
The air treatment process of the heating, ventilating, air conditioning and refrigerating equipment comprises the following steps: firstly, after the air comes in, except introducing the new trend, can cool off the air and handle, then just carry out filtration treatment, after filtration treatment, increased several characteristics: the first is to add an electronic dust catcher which can mainly catch dust of very small particles, generally speaking, it can catch dust of one micron, and most of the dust in the range of the dust is bacteria, virus, smoke or peculiar smell, so that the dust can be filtered.
However, the existing heating, ventilating, air conditioning and refrigerating equipment cannot accurately and intuitively reflect the relation of each equipment of the heating, ventilating, air conditioning and refrigerating equipment and control influence objects on spatial positions in the monitoring process, cannot meet the increasingly deep requirement of fine management, and is low in management efficiency; meanwhile, the location of blockage of foreign matter in the hvac refrigeration equipment cannot be accurately diagnosed.
Disclosure of Invention
The invention aims to provide a BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment, which not only can intuitively reflect the relation of each equipment of the heating, ventilating, air conditioning and refrigerating equipment and a control influence object on the spatial position, but also can accurately judge the position where foreign matter blockage occurs and judge whether a dust removal sterilizer breaks down or not.
The embodiment provides a foreign matter detection method of heating, ventilating, air conditioning and refrigerating equipment based on BIM, which comprises the following steps:
s1: acquiring preset information of heating, ventilating, air conditioning and refrigerating equipment from a Building Information Model (BIM), wherein the preset information comprises space distribution information and attribute information of a refrigerating and heating subsystem, a fresh air subsystem and an exhaust subsystem in the preset heating, ventilating, air conditioning and refrigerating equipment, the preset information is used as heating, ventilating and air conditioning system 3D modeling information, and a 3D heating, ventilating and air conditioning system model is established according to the heating, ventilating and air conditioning system 3D modeling information;
s2: the fresh air subsystem comprises a fresh air component and a fresh air sensor, the fresh air component comprises an air inlet pipe, a dust removal sterilizer, an air inlet fan and a humidifier which are arranged in the air inlet pipe, the fresh air sensor comprises a first pressure sensor and a second pressure sensor which are arranged on an air inlet side and an air outlet side of the dust removal sterilizer, an air inlet motor rotating speed sensor, an air inlet motor current sensor and an air inlet voltage sensor which are used for detecting the real-time rotating speed, current and voltage of the air inlet fan, a third pressure sensor and a fourth pressure sensor which are arranged on the air inlet side and the air outlet side of the humidifier, and an air detection sensor which is arranged in the air inlet pipe and is positioned at an air outlet of the air inlet pipe;
the exhaust subsystem comprises an exhaust assembly and an exhaust sensor, the assembly comprises an exhaust pipe and an exhaust fan arranged in an air inlet pipe, and the exhaust sensor comprises an exhaust motor rotating speed sensor, an exhaust motor current sensor and an exhaust voltage sensor which are used for detecting the real-time rotating speed, current and voltage of the exhaust fan;
s3: displaying a fresh air assembly, a fresh air sensor, an exhaust assembly, an exhaust sensor and an air detection sensor in the heating, ventilating, air conditioning and refrigerating equipment at corresponding positions of the 3D heating, ventilating and air conditioning system model according to corresponding display modes;
displaying data acquired by the fresh air sensor, the exhaust air sensor and the air detection sensor in real time at corresponding positions of the 3D heating, ventilating and air conditioning system model according to corresponding display modes;
s4: connecting a calculation processor with the first pressure sensor and the second pressure sensor, and calculating the difference between pressure data acquired by the first pressure sensor and the second pressure sensor in real time to form a first real-time pressure difference;
connecting a calculation processor with the third pressure sensor and the fourth pressure sensor, and calculating the difference between pressure data acquired by the third pressure sensor and the fourth pressure sensor in real time to form a second real-time pressure difference;
enabling a calculation processor to be connected with the air inlet motor rotating speed sensor, the air inlet motor current sensor and the air inlet voltage sensor, acquiring the real-time rotating speed, current and voltage of the air inlet fan, and then calculating the real-time air inlet power of the air inlet fan according to the current and voltage of the air inlet fan;
connecting a calculation processor with the exhaust motor rotating speed sensor, the exhaust motor current sensor and the exhaust voltage sensor to acquire the real-time rotating speed, current and voltage of the exhaust fan, and then implementing the current and voltage to calculate the real-time exhaust power of the exhaust fan;
s5: under the standard condition, the pressure difference between the air inlet side and the air outlet side of the dust removal sterilizer is a first standard pressure difference, the first standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain a first real-time pressure difference, then whether the first real-time pressure difference exceeds the floating range of the first standard pressure difference is compared, and if the first real-time pressure difference exceeds the floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer has foreign matters;
under the standard condition, the pressure difference between the air inlet side and the air outlet side of the humidifier is a second standard pressure difference, the second standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain a second real-time pressure difference, then whether the second real-time pressure difference exceeds the floating range of the second standard pressure difference is compared, and if the second real-time pressure difference exceeds the floating range of the second standard pressure difference, the alarm unit alarms that the humidifier has foreign matters;
the diagnostic processor is stored with an air inlet fan real-time rotating speed-standard air inlet power comparison table, so that the diagnostic processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time air inlet power of the air inlet fan, and compares the real-time air inlet power with the standard air inlet power of the same rotating speed, if the real-time air inlet power is greater than the standard air inlet power (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the air inlet fan has foreign matters;
the diagnosis processor is stored with an exhaust fan real-time rotating speed-standard exhaust power comparison table, the diagnosis processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time exhaust power of the exhaust fan, the real-time exhaust power and the standard exhaust power with the same rotating speed are compared, and if the real-time exhaust power is greater than the standard exhaust power (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the exhaust fan has foreign matters;
the diagnostic processor is stored with standard air parameters, the diagnostic processor is connected with the air detection sensor to obtain real-time air parameters in the fresh air component, the real-time air parameters and the standard air parameters are compared, and if indexes of the real-time air parameters exceed a preset range of the standard air parameters and the first real-time pressure difference is within a floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer is out of order.
Further, in S1, the method for establishing the 3D hvac system model according to the hvac system 3D modeling information includes: and converting the 3D modeling information of the heating, ventilation and air conditioning system into data information in a format required by modeling, and importing the data information in the format required by modeling into a modeling engine to obtain a 3D heating, ventilation and air conditioning system model.
Further, the air detection sensor includes a dust detection sensor and a formaldehyde detection sensor.
Further, the current detected by the current sensor of the air inlet motor comprises Q-axis current I of the air inlet fanQAnd D-axis current IDThe voltage detected by the air inlet voltage sensor comprises Q-axis voltage U of the air inlet fanQAnd D-axis voltage UDCalculating the real-time exhaust power P calculated by the processorInto＝IQ*UQ+ID*UD。
The invention has the beneficial effects that: the 3D heating ventilation air-conditioning system model constructed based on the building information model BIM can visually reflect the relation of each device of the heating ventilation air-conditioning refrigeration equipment and a control influence object on a spatial position, and can judge whether the foreign matters on the devices (a fan, a dust removal sterilizer and the like) which are easy to absorb the foreign matters in the heating ventilation air-conditioning refrigeration equipment reach the alarm degree through a calculation processor and a diagnosis processor, so that when blockage occurs, the positions where the foreign matters are blocked can be found out from the huge heating ventilation air-conditioning refrigeration equipment visually and quickly, so that the cleaning or maintenance can be carried out on the large fixed points in time, time is saved, the management difficulty and the maintenance difficulty are reduced, whether the dust removal sterilizer in each air inlet pipe breaks down can be judged, and air which does not reach the standard is prevented from being sent into a room.
Drawings
FIG. 1 is a flow chart of a foreign matter detection method of a BIM-based heating, ventilating, air conditioning and refrigerating device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for detecting a foreign object in a BIM-based heating, ventilation, air conditioning and refrigeration device, including the following steps:
s1: the method comprises the steps of obtaining preset information of heating, ventilating, air conditioning and refrigerating equipment from a building information model BIM, wherein the preset information comprises space distribution information and attribute information of a refrigerating and heating subsystem, a fresh air subsystem and an exhaust subsystem in the preset heating, ventilating, air conditioning and refrigerating equipment, taking the preset information as heating, ventilating and air conditioning system 3D modeling information, and establishing a 3D heating, ventilating and air conditioning system model according to the heating, ventilating and air conditioning system 3D modeling information.
In S1, the method for creating a 3D hvac system model according to the hvac system 3D modeling information includes: and converting the 3D modeling information of the heating, ventilation and air conditioning system into data information in a format required by modeling, and importing the data information in the format required by modeling into a modeling engine to obtain a 3D heating, ventilation and air conditioning system model.
According to the identification of each pipeline, each adjusting valve and each device in the heating, ventilating, air conditioning and refrigerating equipment, finding out air conditioning information and a display mode of actual operation parameters related to each pipeline, each adjusting valve and each device in the heating, ventilating, air conditioning and refrigerating equipment in a 3D heating, ventilating and air conditioning system model, wherein the air conditioning information comprises the current power consumption and the monthly average power consumption of the devices on the same day, the display mode comprises one or any combination of the following modes: colors, patterns or characters; displaying the actual operation parameters of the heating, ventilating, air conditioning and refrigerating equipment at the position of the air conditioning information according to a corresponding display mode; the 3D heating, ventilating and air-conditioning system model has actual shapes and spatial distribution conditions corresponding to the actual structures of pipelines and equipment in the actual heating, ventilating and air-conditioning system.
According to the number of rooms in the building where the heating, ventilating, air conditioning and refrigerating equipment is located, the heating, ventilating, air conditioning and refrigerating equipment can comprise a plurality of refrigerating and heating subsystems, a plurality of fresh air subsystems, a plurality of air exhaust subsystems and the like.
S2: the new trend subsystem includes new trend subassembly and new trend sensor, the new trend subassembly includes the air-supply line and sets up dust removal sterilizer, air inlet fan and the humidifier in the air-supply line, the new trend sensor still including be used for detecting including setting up in the first pressure sensor and the second pressure sensor of dust removal sterilizer air-supply side and air-out side air inlet motor speed sensor, air inlet motor current sensor and the air inlet voltage sensor of real-time rotational speed, electric current and voltage of air inlet fan, still including set up in the third pressure sensor and the fourth pressure sensor of humidifier air-supply side and air-out side still including set up in the air-supply line just be located the empty gas detection sensor of the air outlet of air-supply line.
The air exhaust subsystem comprises an air exhaust assembly and an air exhaust sensor, the assembly air exhaust pipe and an air exhaust fan arranged in the air inlet pipe, and the air exhaust sensor comprises an air exhaust motor rotating speed sensor, an air exhaust motor current sensor and an air exhaust voltage sensor which are used for detecting the real-time rotating speed, current and voltage of the air exhaust fan.
The air detection sensor comprises a dust detection sensor and a formaldehyde detection sensor which are respectively used for detecting the PM value and the formaldehyde content of the air discharged to the indoor from the air outlet of the air inlet pipe, and the air detection sensor is positioned behind the dust removal sterilizer and is used for detecting the air which is subjected to dust removal sterilization by the dust removal sterilizer.
S3: and displaying a fresh air component, a fresh air sensor, an exhaust component, an exhaust sensor and an air detection sensor in the heating, ventilation and air conditioning refrigeration equipment at corresponding positions of the 3D heating, ventilation and air conditioning system model according to corresponding display modes.
And displaying the data acquired by the fresh air sensor, the exhaust air sensor and the air detection sensor in real time at the corresponding positions of the 3D heating, ventilating and air conditioning system model according to the corresponding display modes.
S4: and connecting a calculation processor with the first pressure sensor and the second pressure sensor, and calculating the difference between the pressure data acquired by the first pressure sensor and the second pressure sensor in real time to form a first real-time pressure difference.
And connecting a calculation processor with the third pressure sensor and the fourth pressure sensor, and calculating the difference between the pressure data acquired by the third pressure sensor and the pressure data acquired by the fourth pressure sensor in real time to form a second real-time pressure difference.
And the calculation processor is connected with the air inlet motor rotating speed sensor, the air inlet motor current sensor and the air inlet voltage sensor to obtain the real-time rotating speed, current and voltage of the air inlet fan, and then the real-time air inlet power of the air inlet fan is calculated according to the current and voltage of the air inlet fan.
And the calculation processor is connected with the exhaust motor rotating speed sensor, the exhaust motor current sensor and the exhaust voltage sensor to acquire the real-time rotating speed, current and voltage of the exhaust fan, and then the current and voltage are applied to calculate the real-time exhaust power of the exhaust fan.
The current detected by the current sensor of the air inlet motor comprises Q-axis current I of the air inlet fanQAnd D-axis current IDThe voltage detected by the air inlet voltage sensor comprises Q-axis voltage U of the air inlet fanQAnd D-axis voltage UDCalculating the real-time exhaust power P calculated by the processorInto＝IQ*UQ+ID*UD。
S5: under the standard condition, the pressure difference between the air inlet side and the air outlet side of the dust removal sterilizer is a first standard pressure difference, the first standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain the first real-time pressure difference, then whether the first real-time pressure difference exceeds the floating range of the first standard pressure difference is compared, and if the first real-time pressure difference exceeds the floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer has foreign matters. At the moment, the dust removal sterilizer is judged to be adhered with the smoke dust exceeding the standard or to be blocked by the smoke dust, and when the alarm unit gives an alarm, the 3D heating and ventilation air conditioning system model highlights the position information and the identity information of the dust removal sterilizer at the position where the foreign matters exceed the standard so as to be convenient for the supervision personnel to identify and implement cleaning or maintenance.
Under the standard condition, the pressure difference between the air inlet side and the air outlet side of the humidifier is a second standard pressure difference, the second standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain a second real-time pressure difference, then whether the second real-time pressure difference exceeds the floating range of the second standard pressure difference is compared, and if the second real-time pressure difference exceeds the floating range of the second standard pressure difference, the alarm unit alarms that the humidifier has foreign matters. At the moment, the situation that the humidifier is adhered with smoke dust exceeding the standard or is blocked by the smoke dust is judged, and when the alarm unit gives an alarm, the 3D heating, ventilating and air conditioning system model highlights the position information and the identity information of the humidifier at the position where the foreign matters exceed the standard, so that a supervisor can recognize and clean or maintain the humidifier conveniently.
The diagnosis processor is stored with an air inlet fan real-time rotating speed-standard air inlet power comparison table, the diagnosis processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time air inlet power of the air inlet fan, the real-time air inlet power and the standard air inlet power with the same rotating speed are compared, and if the real-time air inlet power is larger than the standard air inlet power by (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the air inlet fan has foreign matters. At the moment, the situation that the smoke dust exceeding the standard adheres to the air inlet fan or is blocked by the smoke dust is judged, and when the alarm unit gives an alarm, the position information and the identity information of the air inlet fan at the position where the foreign matters exceed the standard are highlighted by the 3D heating and ventilation air conditioning system model, so that a supervisor can recognize and carry out cleaning or maintenance conveniently.
The diagnosis processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time exhaust power of the exhaust fan, and compares the real-time exhaust power with the standard air inlet power of the same rotating speed, if the real-time exhaust power is greater than the standard air outlet power (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the exhaust fan has foreign matters. At the moment, the air inlet fan is judged to be adhered with the smoke dust exceeding the standard or to be blocked by the smoke dust, and when the alarm unit gives an alarm, the 3D heating and ventilation air conditioning system model highlights the position information and the identity information of the air exhaust fan at the position where the foreign matters exceed the standard, so that a supervisor can recognize and implement cleaning or maintenance conveniently.
The diagnostic processor is stored with standard air parameters, the diagnostic processor is connected with the air detection sensor to obtain real-time air parameters in the fresh air component, the real-time air parameters and the standard air parameters are compared, and if indexes of the real-time air parameters exceed a preset range of the standard air parameters and the first real-time pressure difference is within a floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer is out of order. At the moment, the dust removal and sterilization performance of the dust removal sterilizer is judged to be unqualified, and when the alarm unit gives an alarm, the 3D heating, ventilating and air conditioning system model highlights the position information and the identity information of the dust removal sterilizer at the position where the foreign matters exceed the standard, so that a supervisor can conveniently identify and implement replacement or maintenance.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (4)

1. A foreign matter detection method of heating ventilation air conditioning refrigeration equipment based on BIM is characterized in that: the method comprises the following steps:
s1: acquiring preset information of heating, ventilating, air conditioning and refrigerating equipment from a Building Information Model (BIM), wherein the preset information comprises space distribution information and attribute information of a refrigerating and heating subsystem, a fresh air subsystem and an exhaust subsystem in the preset heating, ventilating, air conditioning and refrigerating equipment, the preset information is used as heating, ventilating and air conditioning system 3D modeling information, and a 3D heating, ventilating and air conditioning system model is established according to the heating, ventilating and air conditioning system 3D modeling information;
s2: the fresh air subsystem comprises a fresh air component and a fresh air sensor, the fresh air component comprises an air inlet pipe, a dust removal sterilizer, an air inlet fan and a humidifier which are arranged in the air inlet pipe, the fresh air sensor comprises a first pressure sensor and a second pressure sensor which are arranged on an air inlet side and an air outlet side of the dust removal sterilizer, an air inlet motor rotating speed sensor, an air inlet motor current sensor and an air inlet voltage sensor which are used for detecting the real-time rotating speed, current and voltage of the air inlet fan, a third pressure sensor and a fourth pressure sensor which are arranged on the air inlet side and the air outlet side of the humidifier, and an air detection sensor which is arranged in the air inlet pipe and is positioned at an air outlet of the air inlet pipe;
the exhaust subsystem comprises an exhaust assembly and an exhaust sensor, the assembly comprises an exhaust pipe and an exhaust fan arranged in an air inlet pipe, and the exhaust sensor comprises an exhaust motor rotating speed sensor, an exhaust motor current sensor and an exhaust voltage sensor which are used for detecting the real-time rotating speed, current and voltage of the exhaust fan;
s3: displaying a fresh air assembly, a fresh air sensor, an exhaust assembly, an exhaust sensor and an air detection sensor in the heating, ventilating, air conditioning and refrigerating equipment at corresponding positions of the 3D heating, ventilating and air conditioning system model according to corresponding display modes;
displaying data acquired by the fresh air sensor, the exhaust air sensor and the air detection sensor in real time at corresponding positions of the 3D heating, ventilating and air conditioning system model according to corresponding display modes;
s4: connecting a calculation processor with the first pressure sensor and the second pressure sensor, and calculating the difference between pressure data acquired by the first pressure sensor and the second pressure sensor in real time to form a first real-time pressure difference;
connecting a calculation processor with the third pressure sensor and the fourth pressure sensor, and calculating the difference between pressure data acquired by the third pressure sensor and the fourth pressure sensor in real time to form a second real-time pressure difference;
enabling a calculation processor to be connected with the air inlet motor rotating speed sensor, the air inlet motor current sensor and the air inlet voltage sensor, acquiring the real-time rotating speed, current and voltage of the air inlet fan, and then calculating the real-time air inlet power of the air inlet fan according to the current and voltage of the air inlet fan;
connecting a calculation processor with the exhaust motor rotating speed sensor, the exhaust motor current sensor and the exhaust voltage sensor to acquire the real-time rotating speed, current and voltage of the exhaust fan, and then implementing the current and voltage to calculate the real-time exhaust power of the exhaust fan;
s5: under the standard condition, the pressure difference between the air inlet side and the air outlet side of the dust removal sterilizer is a first standard pressure difference, the first standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain a first real-time pressure difference, then whether the first real-time pressure difference exceeds the floating range of the first standard pressure difference is compared, and if the first real-time pressure difference exceeds the floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer has foreign matters;
under the standard condition, the pressure difference between the air inlet side and the air outlet side of the humidifier is a second standard pressure difference, the second standard pressure difference is pre-stored in the diagnosis processor, the diagnosis processor is connected with the calculation processor to obtain a second real-time pressure difference, then whether the second real-time pressure difference exceeds the floating range of the second standard pressure difference is compared, and if the second real-time pressure difference exceeds the floating range of the second standard pressure difference, the alarm unit alarms that the humidifier has foreign matters;
the diagnostic processor is stored with an air inlet fan real-time rotating speed-standard air inlet power comparison table, so that the diagnostic processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time air inlet power of the air inlet fan, and compares the real-time air inlet power with the standard air inlet power of the same rotating speed, if the real-time air inlet power is greater than the standard air inlet power (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the air inlet fan has foreign matters;
the diagnosis processor is stored with an exhaust fan real-time rotating speed-standard exhaust power comparison table, the diagnosis processor is connected with the calculation processor to obtain the real-time rotating speed and the real-time exhaust power of the exhaust fan, the real-time exhaust power and the standard exhaust power with the same rotating speed are compared, and if the real-time exhaust power is greater than the standard exhaust power (1+ X)%, and X is a preset parameter between 5 and 15, the alarm unit alarms that the exhaust fan has foreign matters;
the diagnostic processor is stored with standard air parameters, the diagnostic processor is connected with the air detection sensor to obtain real-time air parameters in the fresh air component, the real-time air parameters and the standard air parameters are compared, and if indexes of the real-time air parameters exceed a preset range of the standard air parameters and the first real-time pressure difference is within a floating range of the first standard pressure difference, the alarm unit alarms that the dust removal sterilizer is out of order.
2. The BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment according to claim 1, wherein: in S1, the method for creating a 3D hvac system model according to the hvac system 3D modeling information includes: and converting the 3D modeling information of the heating, ventilation and air conditioning system into data information in a format required by modeling, and importing the data information in the format required by modeling into a modeling engine to obtain a 3D heating, ventilation and air conditioning system model.
3. The BIM-based foreign matter detection method for the heating, ventilating, air conditioning and refrigerating equipment as claimed in claim 2, wherein: the air detection sensor comprises a dust detection sensor and a formaldehyde detection sensor.
4. The BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment according to claim 1, wherein: the current detected by the current sensor of the air inlet motor comprises Q-axis current I of the air inlet fanQAnd D-axis current IDThe voltage detected by the air inlet voltage sensor comprises Q-axis voltage U of the air inlet fanQAnd D-axis voltage UDCalculating the real-time exhaust power P calculated by the processorInto＝IQ*UQ+ID*UD。
CN201910992818.9A 2019-10-18 2019-10-18 BIM-based foreign matter detection method for heating, ventilating, air conditioning and refrigerating equipment Pending CN110966722A (en)

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