CN107726535A - A kind of hospital's cold emission air-conditioning system fault self-detection method and system - Google Patents
A kind of hospital's cold emission air-conditioning system fault self-detection method and system Download PDFInfo
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- CN107726535A CN107726535A CN201710826127.2A CN201710826127A CN107726535A CN 107726535 A CN107726535 A CN 107726535A CN 201710826127 A CN201710826127 A CN 201710826127A CN 107726535 A CN107726535 A CN 107726535A
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Abstract
The present invention relates to a kind of hospital's cold emission air-conditioning system fault self-detection method and system, the present invention is monitored in real time by installing various kinds of sensors realization in cold emission air-conditioning system to the environmental aspect of cold emission air-conditioning system, and the signal fed back based on various kinds of sensors and each execution unit, fault pre-alarming and judgement are realized to frozen-irradiated air-conditioning system in background control system, the cold emission air-conditioning system that maximum probability will appear from failure or break down effectively is screened in advance, and control signal is produced according to judged result, corresponding fault alarm is triggered according to caused control signal, and then administrative staff are notified to obtain fault message in time, solves cold emission air-conditioning system failure in time, ensure cold emission air-conditioning system safety, reliable and efficient operation, it is final to realize the purpose for timely responding to user's air-conditioning thermal comfort demand and energy-conservation.
Description
Technical field
The present invention relates to hospital central air-conditioning field, more specifically to a kind of hospital's cold emission air-conditioning system failure
Self checking method and system.
Background technology
Traditional air-conditioning system generally use cross-ventilation heat exchange mode carries out the removal or addition of indoor heat, often makes
Undue heating or undue cooling are built in pairs, so, discomfort are not only caused to human body, while waste substantial amounts of energy
Amount.Therefore, indoor thermal environment is regulated and controled using cold emission air-conditioning system, can be avoided while human body comfort is met
Low-temperature receiver wastes.
But the air quality and functional requirement of hospital are directed to, particularly hospital clinic is waited to see the doctor the cold emission in region
Air-conditioning system (Radiant Cooling System) whether can normal operation, its regulate and control area of space semen donors and resh air requirement
Correlation function requirement whether can be met to be particularly important in routine maintenance procedure, if traditional cold emission air-conditioning system goes out
Existing failure, it is typically to have onsite user's complaint or regular visit targetedly could check and find, lacks ageing, sacrifice
The significant wastage of the energy and resource may also be caused while air conditioning comfortableness.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of hospital's cold emission
Air-conditioning system fault self-detection method and system.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of hospital's cold emission air-conditioning system failure
Self checking method, comprise the following steps：
The fresh air wind pushing temperature of real-time reception cold emission air-conditioning system, fresh air air output, chilled water supply and return water temperature, interior
Return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback signal；
Based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air dense carbon dioxide
Degree, cold emission plate surface temperature and chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, fresh air air output rate of change, cold
Freeze water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and freezing
Water water-carrying capacity rate of change；
If the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel,
Cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply back
Coolant-temperature gage rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity
Rate of change meets preparatory condition, then produces control signal；
Fault alarm is triggered according to caused control signal.
Preferably, methods described also includes：
Ratio based on fresh air air output described in the fresh air calculation of air quantity Yu air quantity setting value；
The ratio of the chilled water water-carrying capacity and water flow set point is calculated based on the chilled water water-carrying capacity.Preferably,
The fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate table
Face temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, the change of chilled water supply and return water temperature
Rate, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change meet pre-
If condition includes：
It is the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold
Radiant panel surface temperature and chilled water water-carrying capacity are zero；Or
The fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, interior are returned
Wind changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change are zero.
Preferably, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water
Supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water
Flow change rate meets that preparatory condition also includes：
In preset time period：
The fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rise and the fresh air air output is 0；
Or the fan operation feedback signal is abnormal；
The fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air is sent
Air quantity and the ratio of air quantity setting value are more than the 150% of fresh air valve area.
Preferably, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water
Supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water
Flow change rate meets that preparatory condition also includes：
The cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or
The cold emission plate surface temperature is less than cold emission plate surface temperature upper limit value in the preset time period；Or
The ratio of the chilled water water-carrying capacity and water flow set point is less than freezing penstock in the preset time period
The 50% of aperture, or the ratio of the chilled water water-carrying capacity and water flow set point are more than freezing in the preset time period
The 150% of penstock aperture.
The present invention also provides a kind of hospital's cold emission air-conditioning system fault self-checking system, including：
Receiving module, fresh air wind pushing temperature, fresh air air output, chilled water for real-time reception cold emission air-conditioning system supply
Return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback letter
Number；
First computing module, for based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, room
Interior return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, fresh air
Air output rate of change, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface temperature
Spend rate of change and chilled water water-carrying capacity rate of change；
Processing module, in the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air
Gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, the change of fresh air air output
Rate, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and
When chilled water water-carrying capacity rate of change meets preparatory condition, control signal is produced；
Control module, for the control signal triggering fault alarm caused by.
Preferably, in addition to：
Second computing module, for based on fresh air air output described in the fresh air calculation of air quantity and the ratio of air quantity setting value
Value, and the ratio based on the chilled water water-carrying capacity calculating chilled water water-carrying capacity and water flow set point.
Preferably, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water
Supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water
Flow change rate meets that preparatory condition includes：
It is the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold
Radiant panel surface temperature, chilled water water-carrying capacity are zero；Or
Fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air two
Carbonoxide change rate of concentration, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change are zero.
Preferably, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water
Supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water current
Quantitative change rate meets that preparatory condition also includes：
In preset time period：
The fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rise and the fresh air air output is 0；
Or the fan operation feedback signal is abnormal；
The fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air is sent
Air quantity and the ratio of air quantity setting value are more than the 150% of fresh air valve area.
Preferably, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water
Supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water
Flow change rate meets that preparatory condition also includes：
The cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or
The cold emission plate surface temperature is less than cold emission plate surface temperature upper limit value in the preset time period；Or
The ratio of the chilled water water-carrying capacity and water flow set point is less than freezing penstock in the preset time period
The 50% of aperture, or the chilled water water-carrying capacity and the ratio of the water flow set point are more than in the preset time period
The 150% of chilled water valve opening.
Implement the hospital's cold emission air-conditioning system fault self-detection method and system of the present invention, have the advantages that：It is logical
Cross and the ambient parameter of each operational factor of hospital's cold emission air-conditioning system and air-conditioning system is carried out to monitor in real time, analyzed and processed, can
The fault pre-alarming to cold emission air-conditioning system and judgement are realized, the system failure is found in time and triggers fault alarm, improve system
That safeguards is ageing.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the schematic flow sheet of hospital's cold emission air-conditioning system fault self-detection method embodiment one of the present invention；
Fig. 2 is the logic diagram of hospital's cold emission air-conditioning system fault self-checking system embodiment one of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The present invention is applied to hospital central air-conditioning field, more particularly to hospital clinic cold emission air-conditioning system fault remote
Automatically the method diagnosed.Lack method that is ageing and sacrificing user's thermal comfort compared to conventional failure guarantee and inspection, this
Invention is by the various kinds of sensors installed in cold emission air-conditioning system and execution unit feedback signal, and background application software is (such as
IBMS, Intelligent Building Management System, intelligent building management system) carry out distant early warning and event
Barrier judges, only need to install CO2 concentration sensor additional in existing cold emission air-conditioning system indoor return air mouth, interior adds towards cold emission plate
Infrared temperature sensor is filled, and by cold emission air blower fan start and stop, gear signal, freezing water valve switch/
Opening amount signal feeds back to IBMS software platforms by wire/radio network, you can effective to screen fault pre-alarming or fault alarm
Cold emission air-conditioning system, find failure cause in time, help property management personnel's timely processing problem, ensure cold emission air-conditioning
System reliable and energy-saving is run and user's thermal comfort.
Fig. 1 is a kind of flow signal of hospital's cold emission air-conditioning system fault self-detection method embodiment one provided by the invention
Figure, hospital's cold emission air-conditioning system fault self-detection method of the present embodiment can be realized in IBMS systems, by installed in cold spoke
Each sensor of air-conditioning system and the signal of the execution unit feedback of cold emission air-conditioning system are penetrated, is realized to cold emission air-conditioning system
The real-time monitoring of the operation conditions of system, and carried out based on the signal that each sensor and the execution unit of cold emission air-conditioning system feed back
Calculate, analysis judgement processing, judge that result carries out fault pre-alarming to cold emission air-conditioning system according to analysis, and be based on early warning
As a result failure cause is obtained, and then produces corresponding control signal to trigger fault alarm, timely and effectively screening maximum probability will
The hospital's cold emission air-conditioning system for breaking down or having broken down, quickly makes fault pre-alarming and alarm, so as to administrative staff
Timely and effective solution failure and associated maintenance.
As shown in figure 1, hospital's cold emission air-conditioning system fault self-detection method of the present embodiment comprises the following steps：
S1, the fresh air wind pushing temperature of real-time reception cold emission air-conditioning system, fresh air air output, chilled water supply and return water temperature,
Indoor return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback signal.
In this step, fresh air wind pushing temperature can carry out monitoring and data acquisition, and by number in real time by temperature sensor
According to real-time Transmission into backstage IBMS control systems, wherein, the sensor for monitoring fresh air wind pushing temperature can be arranged on fresh air
Air supply duct is close to location of air supply inlet, i.e., after fresh-air fan and surface cooler.Fresh air air output can be entered by air flow sensor
Row monitoring and data acquisition, and by real-time data transmission into backstage IBMS control systems in real time, wherein, sent for monitoring fresh air
The sensor of air quantity can be arranged on fresh air air supply duct close to location of air supply inlet, i.e., after fresh-air fan.
Chilled water supply and return water temperature includes chilled water supply water temperature and chilled water return water temperature, respectively by water temperature sensor
Monitoring and data acquisition in real time are carried out, wherein, the water temperature sensor for monitoring and measuring chilled water supply water temperature can be installed
In cold emission plate chilled water feed pipe, the water temperature sensor for monitoring and measuring cold-water return temperature can be arranged on cold spoke
Penetrate in plate chilled water return pipe.It is to be appreciated that water temperature sensor in chilled water feed pipe with chilled water return pipe
Water temperature sensor can use identical water temperature sensor.
Indoor return air gas concentration lwevel can be carried out monitoring and data acquisition in real time by gas concentration lwevel sensor, its
In, gas concentration lwevel sensor can be arranged near indoor return air mouth.Cold emission plate surface temperature can be entered by temperature sensor
Row monitoring and data acquisition in real time, wherein, the temperature sensor for measuring cold emission plate surface temperature can install indoors four
All wall probes and position (pop one's head in and need to be typically aligned with cold emission plate) corresponding to cold emission Board position.Preferably, in the reality
Apply in example, in order to obtain more accurate data, the temperature sensor for measuring cold emission plate surface temperature can use infrared
Line temperature sensor.
Chilled water water-carrying capacity can be carried out monitoring and data acquisition in real time by water flow sensor, wherein, water flow sensor
Can be arranged on cold emission plate chilled water return pipe in, by water flow sensor can to chilled water water-carrying capacity carry out in real time monitoring and
Data acquisition, and by water flow sensor by the real-time data transmission gathered into IBMS control systems.
Fan operation feedback signal, the monitoring running state module that can be carried when cold emission air-conditioning system is run by blower fan
It is monitored and feeds back, i.e., be arranged on monitoring modular in the blower fan of the present embodiment, the monitoring modular can monitors the fortune of blower fan in real time
Signal corresponding to row state and conversion is fed back in IBMS control systems.Wherein, fan operation feedback signal is data signal, example
Such as can be 0 and 1,0 to represent that blower fan stops, 1 represents blower fan standard-sized sheet and normal, when the signal of blower fan feedback be non-zero non-1 numeral letter
Number when, then show blower fan feedback is abnormal signal, and in other words, blower fan is abnormal.
Further, in this step, IBMS control systems can also receive fresh air valve area signal and freezing water valve
Door opening amount signal.It is to be appreciated that in this embodiment, fresh air valve area signal can be by the feedback of setting inside fresh air air-valve
Module feedback to IBMS control systems obtain, you can by the feedback device that is set in fresh air air-valve gather air-valve steering angle with
Aperture size is obtained, wherein, 0% represents that fresh air air-valve is fully closed, and 100% represents fresh air air-valve standard-sized sheet.Chilled water valve opening by
The feedback device set in freezing penstock is monitored to the aperture size of valve, and then is converted to corresponding signal and is fed back to
In IBMS control systems, wherein, 0% represents that freezing penstock is fully closed, and 100% represents chilled water valve wide open.
It should be noted that in this step, collection of each sensor to data is transmitted as a mistake for continuing, being spaced
Journey, wherein, the time interval of data acquisition can be configured in advance, such as 1 minute, 2 minutes, 5 minutes or 15 minutes, the present invention
It is not especially limited.
It is to be appreciated that each sensor and the signal of execution unit feedback are transmitted into IBMS control systems, specially pass
Transport in IBMS control systems in the processor (or controller) with data operation processing function, by the processor (or control
Device) data and signal are analyzed and processed, judged.Wherein, processor referred herein (or controller) includes but unlimited
In microprocessor, microcontroller, digital signal processor, micro calculator or central processing unit etc..
S2, based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air carbon dioxide
Concentration, cold emission plate surface temperature, chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, fresh air air output rate of change, cold
Freeze water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and freezing
Water water-carrying capacity rate of change.
In this step, the rate of change of fresh air wind pushing temperature can be by the wind pushing temperature at current time and the fresh air of last moment
Wind pushing temperature make after difference operation again divided by prefixed time interval, to obtain rate of change.For example, it is assumed that the fresh air of last moment
Wind pushing temperature is Tt-1, the fresh air wind pushing temperature at current time is Tt, prefixed time interval is △ t, then fresh air wind pushing temperature change
Rate is (Tt-1-Tt)/△t.Similarly, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air dioxy
Changing concentration of carbon rate of change, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change can be carried out by the computational methods
Calculate and obtain.
Preferably, in this step, in addition to：
According to fresh air air output, chilled water water-carrying capacity, calculating fresh air air output and the ratio of air quantity setting value received
With chilled water water-carrying capacity and the ratio of water flow set point.It is based on fresh air air output and wind described in the fresh air calculation of air quantity
The ratio of setting value is measured, and the ratio of the chilled water water-carrying capacity and water flow set point is calculated based on the chilled water water-carrying capacity
Value.
If S3, the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air dense carbon dioxide
Degree, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply
Return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water water-carrying capacity
Rate of change meets preparatory condition, then produces control signal.
In this step, on preparatory condition it should be noted that：Preparatory condition can be pre-set to obtain by administrative staff.
Imposed a condition for example, administrative staff can set in advance when central air conditioner system first powers on.Or can also be in central hollow
In adjusting system running, by inputting after a certain preset password setting to be imposed a condition etc., the embodiment of the present invention is not done
It is specific to limit.The present invention can store imposing a condition for setting by various memory devices, and each memory device can be by one or more
Individual storage assembly is realized.
Further, in this step, fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air
Gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, the change of fresh air air output
Rate, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change,
Chilled water water-carrying capacity rate of change meets that preparatory condition includes：
Fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission
Plate surface temperature, chilled water water-carrying capacity are zero.
Or fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, interior
Return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change are zero.
Or fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air
Air output and the ratio of air quantity setting value are more than the 150% of fresh air valve area.
Or cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or institute
State cold emission plate surface temperature and be less than cold emission plate surface temperature upper limit value in the preset time period；
Or 50% of the ratio of the chilled water water-carrying capacity and water flow set point less than chilled water valve opening, or
The ratio of person's chilled water water-carrying capacity and water flow set point is more than the 150% of chilled water valve opening.
Preferably, the control signal of the present embodiment includes power failure control signal, network failure control signal, fresh air wind
Machine failure control signal, fresh air air-valve failure control signal, chilled water fault of water pump control signal or chilled water failsafe valve
Control signal.
S4, the control signal triggering fault alarm caused by.
In this step, according to caused power failure control signal, network failure control signal, fresh air in step S3
Fan trouble control signal, fresh air air-valve failure control signal, chilled water fault of water pump control signal and chilled water failsafe valve
Fault alarm corresponding to the triggering of any one control signal in control signal.
Specially：
When fresh air wind pushing temperature, fresh air air output, chilled water the water supply temperature at the current time that IBMS control systems are received
Degree and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature and chilled water water-carrying capacity are zero, then can sentence
There is power failure in disconnected hospital cold emission air-conditioning system, power failure control signal is produced, further according to caused power failure
Control signal triggering power failure alarm.
Or if IBMS control systems according to the rate of change calculated, and judge fresh air wind pushing temperature rate of change, fresh air
Air output rate of change, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface temperature
It is zero to spend rate of change and chilled water water-carrying capacity rate of change, then can determine whether that network failure occurs in hospital's cold emission air-conditioning system, is produced
Raw network failure control signal, further according to the triggering network failure alarm of caused network failure control signal.
Or in preset time period, fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rises and fresh air
Air output is zero, then can determine whether that fresh-air fan failure occurs in cold emission air-conditioning system, produces fresh-air fan failure control signal, then
Fresh-air fan fault alarm is triggered according to caused fresh-air fan failure control signal.Or in preset time period, blower fan
Feedback signal exception is run, i.e. the signal of blower fan feedback is non-zero non-1 status signal, then can determine whether that cold emission air-conditioning system goes out
Existing fresh-air fan failure, produces fresh-air fan failure control signal, is touched further according to caused fresh-air fan failure control signal
Send out fresh-air fan fault alarm.
Or in preset time period, if the ratio of the fresh-air volume at current time and air quantity setting value is less than fresh air wind
The 50% of valve opening, then it can determine whether that fresh air air-valve failure occurs in cold emission air-conditioning system, produce fresh air air-valve failure control signal,
Fresh air air-valve fault alarm is triggered further according to caused fresh air air-valve failure control signal.Or in preset time period, newly
Wind air output and the ratio of air quantity setting value are more than the 150% of fresh air valve area, then can determine whether that cold emission air-conditioning system occurs
Fresh air air-valve failure, fresh air air-valve failure control signal is produced, triggered further according to caused fresh air air-valve failure control signal
Fresh air air-valve fault alarm.
Or if cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period, can
Judge that chilled water fault of water pump occurs in cold emission air-conditioning system, chilled water fault of water pump control signal is produced, further according to produced
The triggering chilled water fault of water pump alarm of chilled water fault of water pump control signal.For example, it is assumed that cold emission plate surface temperature upper limit
Value can be set to 25 degrees Celsius, and preset time period is 5 minutes, therefore, if cold emission plate surface temperature was persistently more than 25 in 5 minutes
Degree Celsius, then it can determine whether that chilled water fault of water pump occurs in frozen-irradiated air-conditioning system.Or if cold emission plate surface temperature 5
It is still holding ascendant trend to be persistently more than 25 degrees Celsius and cold emission plate surface temperature in minute, then can determine whether frozen-irradiated air-conditioning
There is chilled water fault of water pump in system.
Or if cold emission plate surface temperature is less than cold emission plate surface temperature upper limit value in the preset time period,
It then can determine whether that chilled water fault of water pump occurs in cold emission air-conditioning system, chilled water fault of water pump control signal produced, further according to institute
Caused chilled water fault of water pump control signal triggering chilled water fault of water pump alarm.For example, it is assumed that cold emission plate surface temperature
Lower limit can be set to 16 degrees Celsius, and preset time period is 5 minutes, therefore, if cold emission plate surface temperature is lasting small in 5 minutes
In 16 degrees Celsius, then it can determine whether that chilled water fault of water pump occurs in frozen-irradiated air-conditioning system.Or if cold emission plate surface temperature
In 5 minutes continuously less than 25 degrees Celsius and cold emission plate surface temperature still for keep downward trend, then can determine whether frozen-irradiated
There is chilled water fault of water pump in air-conditioning system.
Or if the ratio of chilled water water-carrying capacity and water flow set point is less than the 50% of chilled water valve opening, can
Judge that freezing failsafe valve occurs in cold emission air-conditioning system, freezing valve failure control signal is produced, further according to caused cold
Freeze failsafe valve control signal triggering freezing valve fault alarm.Or the if ratio of chilled water water-carrying capacity and water flow set point
Value then can determine whether that freezing failsafe valve occurs in cold emission air-conditioning system, produce freezing valve more than the 150% of chilled water valve opening
Door failure control signal, further according to caused freezing valve failure control signal triggering freezing valve fault alarm.
It is to be appreciated that the preset time period of the present embodiment meaning can be set to 1 minute, 2 minutes, 5 minutes or 15 minutes
Deng can specifically be determined according to practical application, the present invention is not especially limited.
Fig. 2 is a kind of box of hospital's cold emission air-conditioning system fault self-checking system embodiment one provided by the invention
Figure.As shown in Fig. 2 hospital's cold emission air-conditioning system fault self-checking system of the embodiment includes：Receiving module 11, first calculates
Module 12, the second computing module 13, processing module 14 and control module 15.Wherein,
Receiving module 11, fresh air wind pushing temperature, fresh air air output, chilled water for real-time reception cold emission air-conditioning system
Supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback
Signal.
Fresh air wind pushing temperature can carry out monitoring and data acquisition, and in real time by real-time data transmission extremely by temperature sensor
In the IBMS control systems of backstage, wherein, it is close that the sensor for monitoring fresh air wind pushing temperature can be arranged on fresh air air supply duct
Location of air supply inlet, i.e., after fresh-air fan and surface cooler.Fresh air air output can by air flow sensor carry out in real time monitoring and
Data acquisition, and by real-time data transmission into backstage IBMS control systems, wherein, for monitoring the sensor of fresh air air output
Fresh air air supply duct can be arranged on close to location of air supply inlet, i.e., after fresh-air fan.
Chilled water supply and return water temperature includes chilled water supply water temperature and chilled water return water temperature, respectively by water temperature sensor
Monitoring and data acquisition in real time are carried out, wherein, the water temperature sensor for monitoring and measuring chilled water supply water temperature can be installed
In cold emission plate chilled water feed pipe, the water temperature sensor for monitoring and measuring cold-water return temperature can be arranged on cold spoke
Penetrate in plate chilled water return pipe.It is to be appreciated that water temperature sensor in chilled water feed pipe with chilled water return pipe
Water temperature sensor can use identical water temperature sensor.
Indoor return air gas concentration lwevel can be carried out monitoring and data acquisition in real time by gas concentration lwevel sensor, its
In, gas concentration lwevel sensor can be arranged near indoor return air mouth.Cold emission plate surface temperature can be entered by temperature sensor
Row monitoring and data acquisition in real time, wherein, the temperature sensor for measuring cold emission plate surface temperature can install indoors four
All wall probes and position (pop one's head in and need to be typically aligned with cold emission plate) corresponding to cold emission Board position.Preferably, in the reality
Apply in example, in order to obtain more accurate data, the temperature sensor for measuring cold emission plate surface temperature can use infrared
Line temperature sensor.
Chilled water water-carrying capacity can be carried out monitoring and data acquisition in real time by water flow sensor, wherein, water flow sensor
Can be arranged on cold emission plate chilled water return pipe in, by water flow sensor can to chilled water water-carrying capacity carry out in real time monitoring and
Data acquisition, and by water flow sensor by the real-time data transmission gathered into IBMS control systems.
Fan operation feedback signal, the monitoring running state module that can be carried when cold emission air-conditioning system is run by blower fan
It is monitored and feeds back, i.e., be arranged on monitoring modular in the blower fan of the present embodiment, the monitoring modular can monitors the fortune of blower fan in real time
Signal corresponding to row state and conversion is fed back in IBMS control systems.Wherein, fan operation feedback signal is data signal, example
Such as can be 0 and 1,0 to represent that blower fan stops, 1 represents blower fan standard-sized sheet and normal, when the signal of blower fan feedback be non-zero non-1 numeral letter
Number when, then show blower fan feedback is abnormal signal, and in other words, blower fan is abnormal.
Further, IBMS control systems can also receive fresh air valve area signal and chilled water valve opening signal.
It is to be appreciated that in this embodiment, fresh air valve area signal can be fed back to by the feedback module set inside fresh air air-valve
IBMS control systems obtain, you can it is big to obtain aperture to gather air-valve steering angle by the feedback device set in fresh air air-valve
It is small, wherein, 0% represents that fresh air air-valve is fully closed, and 100% represents fresh air air-valve standard-sized sheet.Chilled water valve opening is by freezing penstock
The feedback device of interior setting is monitored to the aperture size of valve, and then is converted to corresponding signal and is fed back to IBMS controls system
In system, wherein, 0% represents that freezing penstock is fully closed, and 100% represents chilled water valve wide open.
It should be noted that collection of each sensor to data is transmitted as a process for continuing, being spaced, wherein, data
The time interval of collection can be configured in advance, such as 1 minute, 2 minutes, 5 minutes or 15 minutes, and the present invention does not limit specifically
It is fixed.
It is to be appreciated that each sensor and the signal of execution unit feedback are transmitted into IBMS control systems, specially pass
Transport in IBMS control systems in the processor (or controller) with data operation processing function, by the processor (or control
Device) data and signal are analyzed and processed, judged.Wherein, processor referred herein (or controller) includes but unlimited
In microprocessor, microcontroller, digital signal processor, micro calculator or central processing unit etc..
First computing module 12, for based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature,
Indoor return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, new
Wind air output rate of change, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface
Rate of temperature change and chilled water water-carrying capacity rate of change.
The rate of change of fresh air wind pushing temperature can be entered by the wind pushing temperature at current time and the fresh air wind pushing temperature of last moment
Row is made after difference operation again divided by prefixed time interval, to obtain rate of change.For example, it is assumed that the fresh air wind pushing temperature of last moment is
Tt-1, the fresh air wind pushing temperature at current time is Tt, prefixed time interval is △ t, then the rate of change of fresh air wind pushing temperature is
(Tt-1-Tt)/△t.Similarly, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air dense carbon dioxide
Degree rate of change, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change can carry out calculating by the computational methods and obtain
.
Second computing module 13, for based on received fresh air air output, chilled water water-carrying capacity, calculate fresh air air output
With the ratio and the ratio of chilled water water-carrying capacity and water flow set point of air quantity setting value.
Processing module 14, in fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air two
Aoxidize concentration of carbon, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change,
Chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, freezing
Water water-carrying capacity rate of change meets preparatory condition, then produces control signal.
On preparatory condition it should be noted that：Preparatory condition can be pre-set to obtain by administrative staff.For example, custodian
Member can set in advance when central air conditioner system first powers on to impose a condition.Or it can also be run in central air conditioner system
Cheng Zhong, by inputting after a certain preset password setting to be imposed a condition etc., the embodiment of the present invention is not specifically limited.This hair
Bright that imposing a condition for setting can be stored by various memory devices, each memory device can be real by one or more storage assemblies
It is existing.
Further, fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air dense carbon dioxide
Degree, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply
Return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water water-carrying capacity
Rate of change meets that preparatory condition includes：
Fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission
Plate surface temperature, chilled water water-carrying capacity are zero.
Or fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, interior
Return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change, chilled water water-carrying capacity rate of change are zero.
Or fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air
Air output and the ratio of air quantity setting value are more than the 150% of fresh air valve area.
Or cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or institute
State cold emission plate surface temperature and be less than cold emission plate surface temperature upper limit value in the preset time period；
Or 50% of the ratio of the chilled water water-carrying capacity and water flow set point less than chilled water valve opening, or
The ratio of person's chilled water water-carrying capacity and water flow set point is more than the 150% of chilled water valve opening.
Preferably, the control signal of the present embodiment includes power failure control signal, network failure control signal, fresh air wind
Machine failure control signal, fresh air air-valve failure control signal, chilled water fault of water pump control signal or chilled water failsafe valve
Control signal.
Control module 15, for the control signal triggering fault alarm caused by.
Specifically, according to caused power failure control signal, network failure control signal, fresh-air fan Fault Control
Appoint in signal, fresh air air-valve failure control signal, chilled water fault of water pump control signal and chilled water failsafe valve control signal
Fault alarm corresponding to a kind of control signal of anticipating triggering.
Specially：
When fresh air wind pushing temperature, fresh air air output, chilled water the water supply temperature at the current time that IBMS control systems are received
Degree and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature and chilled water water-carrying capacity are zero, then can sentence
There is power failure in disconnected hospital cold emission air-conditioning system, power failure control signal is produced, further according to caused power failure
Control signal triggering power failure alarm.
Or if IBMS control systems according to the rate of change calculated, and judge fresh air wind pushing temperature rate of change, fresh air
Air output rate of change, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface temperature
It is zero to spend rate of change and chilled water water-carrying capacity rate of change, then can determine whether that network failure occurs in hospital's cold emission air-conditioning system, is produced
Raw network failure control signal, further according to the triggering network failure alarm of caused network failure control signal.
Or in preset time period, fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rises and fresh air
Air output is zero, then can determine whether that fresh-air fan failure occurs in cold emission air-conditioning system, produces fresh-air fan failure control signal, then
Fresh-air fan fault alarm is triggered according to caused fresh-air fan failure control signal.Or in preset time period, blower fan
Feedback signal exception is run, i.e. the signal of blower fan feedback is non-zero non-1 status signal, then can determine whether that cold emission air-conditioning system goes out
Existing fresh-air fan failure, produces fresh-air fan failure control signal, is touched further according to caused fresh-air fan failure control signal
Send out fresh-air fan fault alarm.
Or in preset time period, if the ratio of the fresh-air volume at current time and air quantity setting value is less than fresh air wind
The 50% of valve opening, then it can determine whether that fresh air air-valve failure occurs in cold emission air-conditioning system, produce fresh air air-valve failure control signal,
Fresh air air-valve fault alarm is triggered further according to caused fresh air air-valve failure control signal.Or in preset time period, newly
Wind air output and the ratio of air quantity setting value are more than the 150% of fresh air valve area, then can determine whether that cold emission air-conditioning system occurs
Fresh air air-valve failure, fresh air air-valve failure control signal is produced, triggered further according to caused fresh air air-valve failure control signal
Fresh air air-valve fault alarm.
Or if cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period, can
Judge that chilled water fault of water pump occurs in cold emission air-conditioning system, chilled water fault of water pump control signal is produced, further according to produced
The triggering chilled water fault of water pump alarm of chilled water fault of water pump control signal.For example, it is assumed that cold emission plate surface temperature upper limit
Value can be set to 25 degrees Celsius, and preset time period is 5 minutes, therefore, if cold emission plate surface temperature was persistently more than 25 in 5 minutes
Degree Celsius, then it can determine whether that chilled water fault of water pump occurs in frozen-irradiated air-conditioning system.Or if cold emission plate surface temperature 5
It is still holding ascendant trend to be persistently more than 25 degrees Celsius and cold emission plate surface temperature in minute, then can determine whether frozen-irradiated air-conditioning
There is chilled water fault of water pump in system.
Or if cold emission plate surface temperature is less than cold emission plate surface temperature upper limit value in the preset time period,
It then can determine whether that chilled water fault of water pump occurs in cold emission air-conditioning system, chilled water fault of water pump control signal produced, further according to institute
Caused chilled water fault of water pump control signal triggering chilled water fault of water pump alarm.For example, it is assumed that cold emission plate surface temperature
Lower limit can be set to 16 degrees Celsius, and preset time period is 5 minutes, therefore, if cold emission plate surface temperature is lasting small in 5 minutes
In 16 degrees Celsius, then it can determine whether that chilled water fault of water pump occurs in frozen-irradiated air-conditioning system.Or if cold emission plate surface temperature
In 5 minutes continuously less than 25 degrees Celsius and cold emission plate surface temperature still for keep downward trend, then can determine whether frozen-irradiated
There is chilled water fault of water pump in air-conditioning system.
Or if the ratio of chilled water water-carrying capacity and water flow set point is less than the 50% of chilled water valve opening, can
Judge that freezing failsafe valve occurs in cold emission air-conditioning system, freezing valve failure control signal is produced, further according to caused cold
Freeze failsafe valve control signal triggering freezing valve fault alarm.Or the if ratio of chilled water water-carrying capacity and water flow set point
Value then can determine whether that freezing failsafe valve occurs in cold emission air-conditioning system, produce freezing valve more than the 150% of chilled water valve opening
Door failure control signal, further according to caused freezing valve failure control signal triggering freezing valve fault alarm.
It is to be appreciated that the preset time period of the present embodiment meaning can be set to 1 minute, 2 minutes, 5 minutes or 15 minutes
Deng can specifically be determined according to practical application, the present invention is not especially limited.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that scope is done are sought, the covering scope of the claims in the present invention all should be belonged to.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of hospital's cold emission air-conditioning system fault self-detection method, it is characterised in that comprise the following steps：
The fresh air wind pushing temperature of real-time reception cold emission air-conditioning system, fresh air air output, chilled water supply and return water temperature, indoor return air
Gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback signal；
Based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold
Radiant panel surface temperature and chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water and supply
Return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water current
Quantitative change rate；
If the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold spoke
Penetrate plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water and supply backwater temperature
Spend rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and the change of chilled water water-carrying capacity
Rate meets preparatory condition, then produces control signal；
Fault alarm is triggered according to caused control signal.
2. hospital's cold emission air-conditioning system fault self-detection method according to claim 1, it is characterised in that methods described is also
Including：
Ratio based on fresh air air output described in the fresh air calculation of air quantity Yu air quantity setting value；
The ratio of the chilled water water-carrying capacity and water flow set point is calculated based on the chilled water water-carrying capacity.
3. hospital's cold emission air-conditioning system fault self-detection method according to claim 1, it is characterised in that the fresh air is sent
Air temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, freezing
Water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air
Changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet preparatory condition bag
Include：
The fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission
Plate surface temperature and chilled water water-carrying capacity are zero；Or
The fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air two
Carbonoxide change rate of concentration, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change are zero.
4. hospital's cold emission air-conditioning system fault self-detection method according to claim 2, it is characterised in that the fresh air is sent
Air temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, freezing
Water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air
Changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet that preparatory condition is also wrapped
Include：
In preset time period：
The fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rise and the fresh air air output is 0；Or
The fan operation feedback signal is abnormal；
The fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air air output
It is more than the 150% of fresh air valve area with the ratio of air quantity setting value.
5. hospital's cold emission air-conditioning system fault self-detection method according to claim 2, it is characterised in that the fresh air is sent
Air temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, freezing
Water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air
Changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet that preparatory condition is also wrapped
Include：
The cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or the cold spoke
Penetrate plate surface temperature and be less than cold emission plate surface temperature upper limit value in the preset time period；Or
The ratio of the chilled water water-carrying capacity and water flow set point is less than chilled water valve opening in the preset time period
50%, or the ratio of the chilled water water-carrying capacity and water flow set point in the preset time period be more than freezing water valve
The 150% of door aperture.
A kind of 6. hospital's cold emission air-conditioning system fault self-checking system, it is characterised in that including：
Receiving module, fresh air wind pushing temperature, fresh air air output, chilled water for real-time reception cold emission air-conditioning system supply backwater
Temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, chilled water water-carrying capacity and fan operation feedback signal；
First computing module, for being returned based on the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, interior
Wind gas concentration lwevel, cold emission plate surface temperature and chilled water water-carrying capacity, calculate fresh air wind pushing temperature rate of change, fresh air air-supply
Quantitative change rate, chilled water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface temperature become
Rate and chilled water water-carrying capacity rate of change；
Processing module, in the fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air dioxy
Change concentration of carbon, cold emission plate surface temperature, chilled water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, cold
Freeze water supply and return water temperature rate of change, indoor return air changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and freezing
When water water-carrying capacity rate of change meets preparatory condition, control signal is produced；
Control module, for the control signal triggering fault alarm caused by.
7. hospital's cold emission air-conditioning system fault self-checking system according to claim 6, it is characterised in that also include：
Second computing module, for the ratio based on fresh air air output described in the fresh air calculation of air quantity Yu air quantity setting value,
And the ratio of the chilled water water-carrying capacity and water flow set point is calculated based on the chilled water water-carrying capacity.
8. hospital's cold emission air-conditioning system fault self-checking system according to claim 6, it is characterised in that the fresh air is sent
Air temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, freezing
Water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air
Changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet preparatory condition bag
Include：
The fresh air wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission
Plate surface temperature and chilled water water-carrying capacity are zero；Or
Fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air titanium dioxide
Concentration of carbon rate of change, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change are zero.
9. hospital's cold emission air-conditioning system fault self-checking system according to claim 7, it is characterised in that the fresh air is sent
Air temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, freezing
Water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, indoor return air
Changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet that preparatory condition is also wrapped
Include：
In preset time period：
The fresh air wind pushing temperature and indoor return air gas concentration lwevel persistently rise and the fresh air air output is 0；Or
The fan operation feedback signal is abnormal；
The fresh air air output and the ratio of air quantity setting value are less than the 50% of fresh air valve area, or the fresh air air output
It is more than the 150% of fresh air valve area with the ratio of air quantity setting value.
10. hospital's cold emission air-conditioning system fault self-checking system according to claim 7, it is characterised in that the fresh air
It is wind pushing temperature, fresh air air output, chilled water supply and return water temperature, indoor return air gas concentration lwevel, cold emission plate surface temperature, cold
Freeze water water-carrying capacity, fresh air wind pushing temperature rate of change, fresh air air output rate of change, chilled water supply and return water temperature rate of change, interior go back to
Wind changes of concentrations of carbon dioxide rate, cold emission plate surface rate of temperature change and chilled water water-carrying capacity rate of change meet preparatory condition also
Including：
The cold emission plate surface temperature is more than cold emission plate surface temperature upper limit in preset time period；Or
The cold emission plate surface temperature is less than cold emission plate surface temperature upper limit value in the preset time period；Or
The ratio of the chilled water water-carrying capacity and water flow set point is less than chilled water valve opening in the preset time period
50%, or the ratio of the chilled water water-carrying capacity and water flow set point in the preset time period be more than freezing water valve
The 150% of door aperture.
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