阅读说明：本技术 一种楼宇内中央空调出风状态监控系统 (Central air conditioning air-out state monitoring system in building ) 是由 吴淑花 于 2021-04-20 设计创作，主要内容包括：本发明公开了一种楼宇内中央空调出风状态监控系统,涉及机房监测技术领域。本发明中：根据出风阀门数目、出风阀门状态分析当前风机盘管所对应的总出风阀门打开状态；根据当前独立的出风阀门开阀状态、当前风机盘管所对应的总出风阀门打开状态,分析当前出风管道阀门占比系数；根据当前风机盘管出风机出风量以及当前出风管道阀门占比系数,分析当前出风口标准风速；其中,对从风机盘管出风机至出风管道末端的气流压头损失进行系统预输入计算分析,分析当前独立化出风管道上产生的出风常态系数。本发明能够及时高效精准的发现出现异常的出风阀门、出风管道,便于后续进行通风管道维修维护操作,提高了楼宇内的空调通风效率,间接降低了能耗损失。(The invention discloses a monitoring system for the air outlet state of a central air conditioner in a building, and relates to the technical field of machine room monitoring. In the invention: analyzing the opening state of a total air outlet valve corresponding to the current fan coil according to the number of the air outlet valves and the state of the air outlet valves; analyzing the current air outlet pipeline valve proportion coefficient according to the current independent air outlet valve opening state and the current total air outlet valve opening state corresponding to the fan coil; analyzing the current standard air speed of an air outlet according to the air outlet quantity of an air outlet machine of the current fan coil and the current air outlet pipeline valve ratio coefficient; the system pre-input calculation analysis is carried out on the loss of the airflow pressure head from the fan coil air outlet machine to the tail end of the air outlet pipeline, and the air outlet normal coefficient generated on the current independent air outlet pipeline is analyzed. The invention can timely, efficiently and accurately find the abnormal air outlet valve and air outlet pipeline, is convenient for subsequent maintenance and maintenance operation of the ventilation pipeline, improves the ventilation efficiency of the air conditioner in a building, and indirectly reduces the energy consumption loss.)

1. A monitoring system for the air outlet state of a central air conditioner in a building is characterized in that the monitoring system monitors and controls the state of a central air conditioner unit in a building air conditioner room, a main ventilation pipeline connected with the central air conditioner unit is installed in the building, and a main pipeline air pressure sensor is arranged on the main ventilation pipeline; all independently be equipped with the air feed small transfer line that is linked together with the main pipeline that ventilates in each floor or the house, be provided with branch pipe baroceptor on the air feed small transfer line, install independent fan coil on the air feed small transfer line, including going out the fan in the fan coil, the last air-out machine that goes out the fan coil receives wireless remote control drive control, and the air-out side intercommunication that goes out the fan has a plurality of air-out pipelines, its characterized in that:

an air outlet valve is arranged on each air outlet pipeline, an indoor air outlet is arranged at the tail end of each air outlet pipeline, and an air outlet air speed sensor is arranged at the indoor air outlet position at the tail end of each air outlet pipeline;

the air outlet air speed sensor detects the air outlet air speed of a node where the air outlet air speed sensor is located;

the monitoring system monitors the real-time voltage on the air outlet machine of the fan coil, analyzes the real-time power of the air outlet machine of the current fan coil and correspondingly analyzes the air outlet quantity of the air outlet machine of the current fan coil;

the monitoring system monitors and analyzes the number of action valves on the air outlet pipeline and the state of each action air outlet valve;

the monitoring system analyzes the opening state of a total air outlet valve corresponding to the current fan coil according to the number of the air outlet valves and the state of the air outlet valves;

the monitoring system analyzes the current air outlet pipeline valve proportion coefficient according to the current independent air outlet valve opening state and the current total air outlet valve opening state corresponding to the fan coil;

the monitoring system analyzes the current standard air speed of the air outlet according to the current air output of the air outlet machine of the fan coil and the current air outlet pipeline valve ratio coefficient;

the method comprises the following steps of carrying out system pre-input calculation analysis on loss of an airflow pressure head from an air outlet machine of a fan coil to the tail end of an air outlet pipeline, and analyzing an air outlet normal coefficient generated on the current independent air outlet pipeline;

and the monitoring system compares and analyzes the node air outlet speed detected by the air outlet speed sensor with the current air outlet standard speed subjected to the air outlet normalization coefficient, and outputs an alarm prompt of the abnormal state of the air outlet pipeline.

2. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, wherein:

an air outlet valve arranged on the air outlet pipeline adopts a wireless remote control electric control valve;

the air outlet valve adopts a servo driving system to carry out linear regulation and control on the valve.

3. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1 or 2, wherein:

a distance sensor for sensing and detecting the transmission distance displacement is arranged in the air outlet valve on the air outlet pipeline or a servo driving system connected with the air outlet valve;

and the distance sensor outputs the displacement information detected by sensing to a monitoring system, and the opening degree of the air outlet valve at the current position is analyzed.

4. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, wherein:

the number of the air outlet valves on the air outlet pipeline is n;

the air outlet valve on the air outlet pipeline is in any state from complete closing to complete opening, and the air outlet valve on the air outlet pipeline is in a complete opening state Q;

the valve opening coefficients of a plurality of air outlet valves on the air outlet pipeline are lambda in sequence₁、λ₂...λ_nWherein λ is₁、λ₂...λ_nAre all belonged to [0, 1 ]]；

Setting the opening state of a total air outlet valve at the air outlet side of the air outlet machine of the fan coil as Wz;

then there is Wz ═ λ₁Q+λ₂Q+...+λ_nQ；

Setting the valve opening coefficient of any air outlet valve on the air outlet pipeline as lambda x;

setting the relation ratio of the valve state of any one air outlet valve to the opening state of the total air outlet valve as the current air outlet pipeline valve occupation ratio phi x;

then Φ x is λ x · Q/Wz.

5. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, wherein:

setting the frictional resistance between the airflow of any air outlet pipeline from the fan coil air outlet machine to the tail end of the air outlet pipeline and the pipeline as hm;

setting the loss coefficient of the airflow pressure head of any one air outlet pipeline from the air outlet machine of the fan coil to the tail end of the air outlet pipeline as hy, wherein hy belongs to (0, 1);

there are: the airflow head loss coefficient hy ∈ frictional resistance hm.

6. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 5, wherein:

setting the friction coefficient of the air in the air outlet pipeline as beta, the length of any air outlet pipeline as L, the diameter of the pipeline as d, and the pneumatic head as (rho u)²/2)Pa；

There is a frictional resistance h_m＝β·(L/d)·(ρu²/2)。

7. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, 4 or 5, wherein:

setting the real-time power of an air outlet machine of a fan coil as Pc, and the air outlet quantity of the air outlet machine in the power state as Fc;

setting the standard wind speed of a corresponding air outlet on any air outlet pipeline as Vo;

vo is phi x Fc;

there are: the loss coefficient hy of the airflow pressure head is in proportion to the real-time power Pc of the fan coil air outlet machine/the air outlet machine air outlet quantity Fc;

setting an air outlet normal coefficient on the current independent air outlet pipeline as k;

then k is 1-hy;

setting the actual reference standard wind speed as k & Vo;

setting a real-time air outlet speed Vc detected by an air outlet speed sensor;

comparing and analyzing the outlet air speed Vc with the actual reference standard air speed k & Vo;

when Vc is larger than or equal to k.vo, the monitoring system judges that the current air outlet pipeline state is normal;

and (II) when Vc is less than k.vo, the monitoring system judges that the current air outlet pipeline state is abnormal.

8. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, wherein:

each air supply branch pipeline is provided with an air outlet machine, an air return machine, an air outlet valve, an air outlet air speed sensor of the fan coil, a sensor and an integrated interface singlechip which are connected with the sensor and the valve on the air return pipeline;

the integrated interface single chip microcomputer transmits the collected information to the unmanned machine room monitoring system through a signal cable.

9. The system for monitoring the air outlet state of the central air conditioner in the building as claimed in claim 1, wherein:

when the alarm prompt of the abnormal state of the air outlet pipeline is output, the alarm prompt information is transmitted to the property management system and the corresponding mobile phone APP through the network system of the machine room;

and the network system of the computer room adopts a Wifi or 4G or 5G information transmission mode.

Technical Field

The invention belongs to the technical field of machine room monitoring, particularly relates to a central air conditioner air-out state monitoring system in a building, and particularly monitors the air-out efficiency of air-out pipelines in an air conditioning system and a ventilation system in the building.

Background

With the high-speed development of intelligent technology, the fields related to the intelligent industry are more and more, and intelligent buildings are deep combination products of traditional buildings and intelligent technology. The intelligent building has the characteristics of safety, convenience, high efficiency and energy conservation through the communication network system set structure, system, service, management and the optimal combination among the communication network system set structure, the system, the service and the management. The intelligent building is a discipline with cross property at the edge, which relates to computer technology, automatic control, communication technology, building technology and the like, and more new technologies are applied to the intelligent building.

In modern building construction, such as office buildings, underground parking lots, shopping malls and other building scenes, a central air conditioner or a corresponding ventilation system is very common, and the central air conditioner system is composed of one or more cold and heat source systems and a plurality of air conditioning systems. In each floor or the house of independent remote control drive, be provided with independent fan coil, the air-out machine in the fan coil provides the air current (air conditioning, heating installation or taking a breath) of requisition to indoor, air-out machine one side is connected with the air-out pipeline of many branches, some pipelines are because long-term unused or decorate in the building and decorate the production deposition, or its pipeline itself, the ageing of parts such as connecting piece, sealing washer, the leakproofness goes wrong, can cause the extrusion, the breakage to the air-out pipeline during construction loading and unloading even when the building, although the air outlet can the air-out, nevertheless air current in the air-out pipeline reveals leads to reacing indoor air outlet air-out efficiency and compares the reduction.

Detect the air outlet among the prior art, all set up an air velocity transducer at the air outlet of air-out pipeline, set up the air-out sensor at fan coil's air-out machine air-out side, directly carry out the sensing monitoring contrast, judge whether normal air-out of air outlet. However, in this way, there are some problems: the method comprises the following steps that (I) mutual influence exists when a plurality of air outlet pipelines connected to the air outlet side of a fan coil are subjected to air outlet, and the air outlet speed has fluctuation; and (II) the length and the directivity of the air outlet pipeline corresponding to each air outlet are different, and the loss of the airflow in the transmission process is also different.

On the basis of overcoming the above-mentioned prior art problem, how to carry out high-efficient accurate air current ventilation efficiency to fan coil air-out pipeline and detect, judge its air-out efficiency state of air-out pipeline, become the important basis that is convenient for in time pinpoint maintain air conditioner ventilation system, promote air conditioner ventilation efficiency, reduce air conditioner ventilation loss.

Disclosure of Invention

The invention aims to provide a monitoring system for the air outlet state of a central air conditioner in a building, which analyzes and judges the air outlet efficiency of an air outlet pipeline by sensing and detecting the air outlet channel of a fan coil in a node manner, timely, efficiently and accurately discovers an abnormal air outlet valve and the air outlet pipeline, facilitates subsequent efficient and accurate maintenance and maintenance operation of a ventilation pipeline, improves the ventilation efficiency of the air conditioner in the building, and indirectly reduces energy consumption loss.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a monitoring system for the air outlet state of a central air conditioner in a building, which is used for monitoring and controlling the state of a central air conditioner unit in a building air conditioner room, wherein a main ventilation pipeline connected with the central air conditioner unit is arranged in the building, and a main pipeline air pressure sensor is arranged on the main ventilation pipeline; all independently be equipped with the air feed small transfer line that is linked together with the main pipeline that ventilates in each floor or the house, be provided with branch pipe baroceptor on the air feed small transfer line, install independent fan coil on the air feed small transfer line, including going out the fan in the fan coil, the last air-out machine that goes out the fan coil receives wireless remote control drive control, and the air-out side intercommunication that goes out the fan has a plurality of air-out pipelines.

An air outlet valve is arranged on each air outlet pipeline, an indoor air outlet is arranged at the tail end of each air outlet pipeline, and an air outlet air speed sensor is arranged at the indoor air outlet position at the tail end of each air outlet pipeline; and the air outlet air speed sensor detects the air outlet air speed of the node where the air outlet air speed sensor is located.

The monitoring system monitors real-time voltage on an air outlet machine of the fan coil, analyzes the real-time power of the air outlet machine of the current fan coil, and correspondingly analyzes the air outlet quantity of the air outlet machine of the current fan coil.

The monitoring system monitors and analyzes the number of action valves on the air outlet pipeline and the state of each action air outlet valve; the monitoring system analyzes the opening state of a total air outlet valve corresponding to the current fan coil according to the number of the air outlet valves and the state of the air outlet valves; the monitoring system analyzes the current air outlet pipeline valve proportion coefficient according to the current independent air outlet valve opening state and the current total air outlet valve opening state corresponding to the fan coil; the monitoring system analyzes the current standard air speed of the air outlet according to the current air output of the air outlet machine of the fan coil and the current air outlet pipeline valve ratio coefficient; the system pre-input calculation analysis is carried out on the loss of the airflow pressure head from the fan coil air outlet machine to the tail end of the air outlet pipeline, and the air outlet normal coefficient generated on the current independent air outlet pipeline is analyzed.

And the monitoring system compares and analyzes the node air outlet speed detected by the air outlet speed sensor with the current air outlet standard speed subjected to the air outlet normalization coefficient, and outputs an alarm prompt of the abnormal state of the air outlet pipeline.

As a preferred technical scheme of the invention, an air outlet valve arranged on an air outlet pipeline adopts a wireless remote control electric control valve; the air outlet valve adopts a servo driving system to carry out linear regulation and control on the valve.

As a preferred technical scheme of the invention, a distance sensor for sensing and detecting the transmission distance displacement is arranged in an air outlet valve on an air outlet pipeline or a servo driving system connected with the air outlet valve; and the distance sensor outputs the displacement information detected by sensing to a monitoring system, and the opening degree of the air outlet valve at the current position is analyzed.

As a preferred technical scheme of the invention, the number of the air outlet valves on the air outlet pipeline is n; the air outlet valve on the air outlet pipeline is in a state of being completely closed toIn any state in the process of complete opening, the full opening state of an air outlet valve on the air outlet pipeline is set as Q; the valve opening coefficients of a plurality of air outlet valves on the air outlet pipeline are lambda in sequence₁、λ₂...λ_nWherein λ is₁、λ₂...λ_nAre all belonged to [0, 1 ]](ii) a The opening state of a total air outlet valve at the air outlet side of the air outlet machine of the fan coil is set as W_z(ii) a Then there is W_z＝λ₁Q+λ₂Q+...+λ_nQ。

The valve opening coefficient of any air outlet valve on the air outlet pipeline is lambda_xSetting the relation ratio of the valve state of any one air outlet valve to the opening state of the total air outlet valve as the current air outlet pipeline valve occupation ratio phi_xThen has phi_x＝λ_x·Q/W_z。

As a preferred technical scheme of the invention, the frictional resistance between the airflow of any air outlet pipeline from the fan coil air outlet machine to the tail end of the air outlet pipeline and the pipeline is set to be h_mSetting the loss coefficient of airflow pressure head of any air outlet pipeline from the air outlet machine of the fan coil to the tail end of the air outlet pipeline as h_yWherein h is_yE (0, 1), there is: coefficient of head loss h of gas flow_yIs proportional to frictional resistance h_m。

As a preferred technical scheme of the invention, the friction coefficient formed by the gas in the air outlet pipeline is beta, the length of any one air outlet pipeline is L, the diameter of the pipeline is d, and the pneumatic pressure head is (rho u)²Per 2) Pa; there is a frictional resistance h_m＝β·(L/d)·(ρu²/2)。

As a preferred technical scheme of the invention, the real-time power of the air outlet machine of the fan coil is Pc, and the air outlet quantity of the air outlet machine in the power state is Fc; setting the standard wind speed of a corresponding air outlet on any air outlet pipeline as Vo; then Vo is equal to phi_xFc; there are: coefficient of head loss h of gas flow_yThe real-time power Pc of the air outlet machine of the oc fan coil/the air outlet quantity Fc of the air outlet machine;

as a preferred technical scheme of the invention, the air-out normal coefficient on the current independent air-out pipeline is set as kIf k is 1-h_y(ii) a And (3) setting the actual reference standard wind speed as k & Vo, setting the real-time air outlet wind speed detected by the air outlet wind speed sensor as Vc, and carrying out comparative analysis on the air outlet wind speed Vc and the actual reference standard wind speed k & Vo:

when Vc is larger than or equal to k.vo, the monitoring system judges that the current air outlet pipeline state is normal;

and (II) when Vc is less than k.vo, the monitoring system judges that the current air outlet pipeline state is abnormal.

As a preferred technical scheme of the invention, each air supply branch pipeline is provided with an integrated interface singlechip which is connected with an air outlet machine, an air return machine, an air outlet valve and an air outlet air speed sensor of a fan coil, and a sensor and a valve on the air return pipeline; the integrated interface single chip microcomputer transmits the collected information to the unmanned machine room monitoring system through a signal cable.

As a preferred technical scheme of the invention, when the alarm prompt of the abnormal state of the air outlet pipeline is output, the alarm prompt information is transmitted to the property management system and the corresponding mobile phone APP through the network system of the machine room; and the network system of the computer room adopts a Wifi or 4G or 5G information transmission mode.

The invention has the following beneficial effects:

1. according to the invention, the air outlet fluency and the air outlet efficiency of the air outlet pipeline are analyzed and judged by carrying out node-based sensing detection on the air outlet channels of the fan coil pipes in each floor or house in the building, and abnormal air outlet valves and air outlet pipelines are timely, efficiently and accurately found, so that subsequent efficient and accurate maintenance and maintenance operations of ventilation pipelines are facilitated, the ventilation efficiency of an air conditioner in the building is improved, and the energy consumption loss is indirectly reduced;

2. the invention analyzes the valve proportion of the air outlet pipeline on a single pipeline independently by analyzing the number of the valves on the air outlet pipeline of the air outlet machine and the linear opening and closing state thereof, thereby effectively and accurately determining the standard air speed of the air outlet of the current air outlet pipeline;

3. according to the invention, the real-time power (air output) of the fan coil air outlet machine and the inherent characteristic attribute of the air outlet pipeline are used for analyzing the gas flow loss of the current air outlet pipeline to obtain the air outlet normalization coefficient, and the actual air speed information is compared and analyzed with the standard air speed after the normalization coefficient, so that whether the running state of the current air outlet pipeline is normal or not is judged efficiently and accurately.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a central air conditioning duct for a building and the distribution of components on the duct according to the present invention;

FIG. 2 is a schematic view of a separate fan coil and downstream air outlet components in a building according to the present invention;

FIG. 3 is a logic diagram of the indoor ventilation control system of the present invention;

FIG. 4 is a logic diagram of the wind speed comparison and abnormal alarm system according to the present invention;

FIG. 5 is a schematic diagram of the system logic of the total outlet valve opening state according to the present invention;

FIG. 6 is a logic diagram of a system for analyzing a valve proportion of a current air outlet pipeline according to the present invention;

FIG. 7 is a schematic diagram of the logic of the comparison between the wind speed of the outlet air and the standard wind speed after normalization of the coefficients;

FIG. 8 is a logic diagram of the air pressure reference analysis between the main and branch pipes in the present invention;

FIG. 9 is a schematic interface diagram of a central air conditioning status management system according to the present invention;

FIG. 10 is an interface schematic of the fan coil operating state of the present invention;

fig. 11 is an interface schematic diagram of the branch pipe ventilation operation state of the invention.

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 given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper," "middle," "length," "inner," and the like are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered as limiting the present invention.

Example one

Referring to fig. 1, 2 and 3, the present invention is a system for monitoring the air outlet state of a central air conditioner in a building, wherein a central air conditioning unit in a building air conditioning machine room is used for cooling or heating, a main ventilation pipe connected with the central air conditioning unit is installed in the building, and a main pipe air pressure sensor is arranged on the main ventilation pipe for sensing and monitoring the air pressure in the main pipe.

And a branch air supply pipeline communicated with the main ventilation pipeline is independently arranged in each floor or house, and a branch air pressure sensor is arranged on each branch air supply pipeline to perform sensing analysis on the air pressure on each branch pipeline.

Each air supply branch pipeline is provided with a fan coil, an air outlet machine is arranged in the fan coil, the air outlet machine on the fan coil is driven and controlled by wireless remote control, and the air outlet side of the air outlet machine is communicated with a plurality of air outlet pipelines.

An air outlet valve is arranged on each air outlet pipeline, and the air outlet valve adopts a wireless remote control electric control valve; the air outlet valve adopts a servo driving system to carry out linear regulation and control on the valve.

A distance sensor for sensing and detecting the transmission distance displacement is arranged in the air outlet valve on the air outlet pipeline or a servo driving system connected with the air outlet valve; and the distance sensor outputs the displacement information detected by sensing to a monitoring system, and the opening degree of the air outlet valve at the current position is analyzed.

An indoor air outlet is arranged at the tail end of each air outlet pipeline, and an air outlet air speed sensor is arranged at the indoor air outlet position at the tail end of each air outlet pipeline; and the air outlet air speed sensor detects the air outlet air speed of the node where the air outlet air speed sensor is located.

Example two

Referring to fig. 4, the monitoring system monitors the real-time voltage on the air outlet machine of the fan coil, and analyzes the real-time power of the air outlet machine of the fan coil.

The monitoring system monitors and analyzes the number of the action valves on the air outlet pipeline and the state of each action-taking air outlet valve.

When the monitoring system outputs the alarm prompt of the abnormal state of the air outlet pipeline, the alarm prompt information is transmitted to the property management system and the corresponding mobile phone APP through the network system of the machine room.

The network system of the online machine room adopts a Wifi or 4G or 5G information transmission mode.

EXAMPLE III

Referring to fig. 5, the monitoring system analyzes the total opening state of the outlet valve corresponding to the current fan coil according to the number of the outlet valves and the state of the outlet valves; and the monitoring system is used for monitoring the opening state of the current independent air outlet valve and the opening state of the current total air outlet valve corresponding to the fan coil.

The number of the air outlet valves on the air outlet pipeline is n; the air outlet valve on the air outlet pipeline is in any state from complete closing to complete opening, and the air outlet valve on the air outlet pipeline is in a complete opening state Q; the valve opening coefficients of a plurality of air outlet valves on the air outlet pipeline are lambda in sequence₁、λ₂...λ_nWherein λ is₁、λ₂...λ_nAre all belonged to [0, 1 ]](ii) a The opening state of a total air outlet valve at the air outlet side of the air outlet machine of the fan coil is set as W_z(ii) a Then there is W_z＝λ₁Q+λ₂Q+...+λ_nQ。

In the above-mentioned₁、λ₂...λ_nAre all belonged to [0, 1 ]]The value of 0 is the complete closing state of the air outlet valve, and the value of 1 is the complete opening state of the air outlet valve.

Example four

Referring to fig. 6, the monitoring system correspondingly analyzes the air output of the air outlet machine of the current fan coil according to the real-time power of the air outlet machine of the current fan coil.

Analyzing the current air outlet pipeline valve proportion coefficient, and analyzing the current standard air speed of an air outlet by a monitoring system according to the current air outlet amount of the air outlet machine of the fan coil and the current air outlet pipeline valve proportion coefficient;

the valve opening coefficient of any air outlet valve on the air outlet pipeline is lambda_xSetting the relation ratio of the valve state of any one air outlet valve to the opening state of the total air outlet valve as the current air outlet pipeline valve occupation ratio phi_xThen has phi_x＝λ_x·Q/W_z。

Setting the real-time power of an air outlet machine of a fan coil as Pc, and the air outlet quantity of the air outlet machine in the power state as Fc; if the corresponding air outlet standard air speed on any air outlet pipeline is Vo, the current air outlet standard air speed Vo is phi_x·Fc。

EXAMPLE five

Referring to fig. 7, the system pre-input calculation analysis is performed on the loss of the air flow head from the fan coil air outlet machine to the end of the air outlet pipeline, and the air outlet normal coefficient generated on the current independent air outlet pipeline is analyzed.

And the monitoring system compares and analyzes the node air outlet speed detected by the air outlet speed sensor with the current air outlet standard speed subjected to the air outlet normalization coefficient, and outputs an alarm prompt of the abnormal state of the air outlet pipeline.

The frictional resistance between the air flow of any air outlet pipeline from the air outlet machine of the fan coil to the tail end of the air outlet pipeline and the pipeline is set to be h_mSetting the loss coefficient of airflow pressure head of any air outlet pipeline from the air outlet machine of the fan coil to the tail end of the air outlet pipeline as h_yWherein h is_yE (0, 1), there is: coefficient of head loss h of gas flow_yIs proportional to frictional resistance h_m。

First, gas flow friction resistance

In the head loss of gas flow, there is a frictional resistance between the gas and the pipe: the gas flows in the pipe, and the friction effect of the pipe wall and the friction effect of the inner part of the gas are caused, so that the friction resistance of the pipe to the gas is formed.

Setting the friction coefficient of the air in the air outlet pipeline as beta, the length of any air outlet pipeline as L, the diameter of the pipeline as d, and the pneumatic head as (rho u)²/2)Pa。

There is a frictional resistance h_m＝β·(L/d)·(ρu²2) · (a) (a formula)

The gas flows in the branch pipe in a laminar flow, the coefficient of friction resistance beta of the gas is 64/Re, and in the case of turbulent flow, the coefficient of friction resistance can be calculated by adopting the following formula:

β＝A/Reⁿquestion mark (second)

Smooth metal pipe a is 0.32, n is 0.25;

the rough surface of the metal pipeline A is 0.129, and n is 0.12.

In general engineering calculation, the beta value can be approximately selected as follows:

the beta value of the smooth metal pipeline is 0.02-0.025;

the rough surface of the metal pipeline beta is 0.035-0.04.

Second, local resistance of gas flow

When the gas channel is locally deformed, such as expansion, contraction, turning, and the channel is provided with a flashboard, the gas flow speed and direction are changed, and gas mass points collide with mass points and tube walls, so that local energy loss is caused.

Local resistance h_j＝T·(ρu²2. The (third formula)

Where T is the local drag coefficient, and the value of T depends mainly on the local drag properties (e.g., the shape, size, etc. of the local obstacle).

Thirdly, analyzing the air-out normal coefficient k in the invention

The head loss in the process of gas circulation in the air outlet pipeline of the invention is mainly caused by the frictional resistance h_mLocal resistance to gas flow h_jInfluence. In addition, the air outlet power P of the air outlet machine_CThe bigger the air outlet side of the air outlet machine, the pneumatic pressure head (rho u)²The greater the/2) the greater the resulting frictional resistance h_mLocal resistance to gas flow h_jThe larger.

Coefficient of head loss h of gas flow_yThe analysis of (a) is as follows:

wherein, Po is the air pressure at the air outlet side of the air outlet machine (an air pressure sensor can be arranged at the air outlet side of the air outlet machine for sensing and collecting), and d is the diameter of the pipeline.

If the normal air outlet coefficient of the current independent air outlet pipeline is k, k is 1-h_y(ii) a And (3) setting the actual reference standard wind speed as k & Vo, setting the real-time air outlet wind speed detected by the air outlet wind speed sensor as Vc, and carrying out comparative analysis on the air outlet wind speed Vc and the actual reference standard wind speed k & Vo:

when Vc is larger than or equal to k.vo, the monitoring system judges that the current air outlet pipeline state is normal;

and (II) when Vc is less than k.vo, the monitoring system judges that the current air outlet pipeline state is abnormal.

EXAMPLE six

Referring to fig. 1 and 8, the branch air pressure sensors on the plurality of air supply branches sense and detect the air pressure in the branch pipes where the branch air pressure sensors are located according to the air pressure information in the main pipe of the air conditioning unit detected by the main pipe air pressure sensor, and the smoothness of the air flow between the main pipe and each branch pipe is determined by the distance between the monitoring point of the air pressure sensor on each branch pipe and the monitoring point of the main pipe air pressure sensor, the horizontal position height of the branch pipe relative to each other and the air outlet state of each branch pipe.

EXAMPLE seven

Please refer to fig. 9, which is a software interface of the central air-conditioning state management system, and illustrates part of the contents in the interface, including displaying and reminding the normal and abnormal states of the fan coil operation states of each floor.

Referring to fig. 10, the floor button key with abnormality in fig. 9 is clicked to enter the specific content interface of the operating state of the floor fan coil, which includes the ventilation operating states of the branch pipes in the floor fan coil, and the branch pipes with abnormality are displayed and reminded of abnormality.

Referring to fig. 11, the button key of the branch duct with abnormality in fig. 10 is clicked to check the specific operation information of the current abnormal branch duct, which includes displaying the opening state of the outlet valve on the current branch duct, the ratio of the outlet duct valve, the reference standard wind speed value, and the wind speed value of the outlet, and performing abnormality reminding.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.