CN107676923A - A kind of Air conditioning System for Hospitals cooling tower failure automatic judging method and device - Google Patents

A kind of Air conditioning System for Hospitals cooling tower failure automatic judging method and device Download PDF

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Publication number
CN107676923A
CN107676923A CN201710826048.1A CN201710826048A CN107676923A CN 107676923 A CN107676923 A CN 107676923A CN 201710826048 A CN201710826048 A CN 201710826048A CN 107676923 A CN107676923 A CN 107676923A
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China
Prior art keywords
cooling tower
cooling
temperature
cooling water
water
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CN201710826048.1A
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Inventor
申利梅
薛雪
缪胜昔
刘忠华
吴兴刚
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Shenzhen Das Intellitech Co Ltd
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Shenzhen Das Intellitech Co Ltd
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Priority to CN201710826048.1A priority Critical patent/CN107676923A/en
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Abstract

The present invention relates to a kind of Air conditioning System for Hospitals cooling tower failure automatic judging method and device,This method by monitoring and gathering cooling tower air inlet/outlet dry-bulb temperature in real time,Cooling tower air inlet/outlet relative humidity,Cooling water supply and return water temperature,Cooling water pipeline water-carrying capacity,Cool down supply mains's water-carrying capacity,Cooling water pipeline pressure,Cooling water valve feedback signal and fan operation feedback signal,Analyzed and processed based on these data and feedback signal,And failure automatic detection and judgement are carried out to cooling tower systems according to analysis processing result,Corresponding fault message and control signal are exported according to detection judged result,And the fault alarm according to corresponding to triggering control signal,Effectively solving the problems, such as that cooling tower breaks down can not check and find in time and safeguard,Not only realize that cooling water system saves,Also ensure the normal and Effec-tive Function of cooling water system,Reduce maintenance cost,Improve ageing,Both the thermal comfort of air-conditioning system can have been ensured,Also energy waste can be avoided.

Description

Automatic fault judgment method and device for cooling tower of air conditioning system in hospital
Technical Field
The invention relates to the field of cooling towers of air conditioning systems in hospitals, in particular to a method and a device for automatically judging faults of the cooling towers of the air conditioning systems in the hospitals.
Background
The real-time monitoring and control of the energy efficiency level of the main equipment of the central air-conditioning system machine room, particularly the refrigeration host machine, is necessary for the energy-saving operation of the central air conditioner. Researches show that the operation energy efficiency of a main unit of a central air conditioning system is improved by 3-4% when the condensation temperature of a condenser of a refrigerating unit is reduced by 1 ℃, and meanwhile, the water supply temperature of cooling water needs to be correspondingly reduced in order to ensure that the condensation temperature is reduced, so that the operation speed and the energy consumption of a cooling tower and a cooling pump are increased. The energy consumption of the cooler has a trade-off relationship with the energy consumption of the cooling tower and the cooling pump.
Therefore, if the working condition (such as the optimal cooling water supply temperature) with the minimum comprehensive energy consumption of the cold machine, the cooling tower and the refrigerating pump can be found, the energy conservation of the cooling water system can be realized. The Cooling Tower is especially important in the routine maintenance process for the cold source energy efficiency requirement of a hospital, particularly whether a Cooling Tower (Cooling Tower) of a Cooling water system of a hospital refrigeration station can normally and efficiently operate, if a fault occurs in the traditional Cooling Tower, the traditional Cooling Tower can be pertinently checked and found only by regular inspection, the timeliness is lacked, and meanwhile, the energy and the resource can be greatly wasted.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and an apparatus for automatically determining a fault of a cooling tower of a hospital air conditioning system, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for automatically judging the fault of the cooling tower of the air conditioning system of the hospital comprises the following steps:
s11, monitoring and acquiring the temperature of air inlet and outlet dry balls of the cooling tower, the relative humidity of air inlet and outlet of the cooling tower, the temperature of cooling water supply and return water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time;
s12, calculating the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the inlet and outlet air relative humidity of the cooling tower, the change rate of the temperature of the cooling water supply return water, the change rate of the water flow of the cooling water pipeline and the change rate of the pressure of the cooling water pipeline according to the collected inlet and outlet air drying ball temperature of the cooling tower, inlet and outlet air relative humidity of the cooling;
s13, generating fault information and control signals when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the operation feedback signal of the fan, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, and triggering fault alarm according to the control signals.
Preferably, the step S12 further includes:
and calculating the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower, the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower and the difference between the temperature of the return water of the cooling water and the temperature of the supply water according to the acquired temperature of the dry air inlet ball and the temperature of the dry air outlet ball of the cooling tower, the acquired relative humidity of the air inlet of the cooling tower and the.
Preferably, the fault information includes cooling tower power fault information, cooling tower network fault information, cooling tower fan fault information, cooling water valve fault information, excessive cooling tower opening number information and cooling water pipeline water flow abnormal information; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information;
the control signals comprise a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower opening excessive control signal and a cooling water pipeline water flow abnormal control signal;
the cooling water valve failure control signal comprises a cooling water valve opening failure control signal and a cooling water valve closing failure control signal.
Preferably, in step S13, the step S includes that the first preset condition that the temperature of the cooling tower inlet and outlet air dry bulb, the relative humidity of the cooling tower inlet and outlet air, the temperature of the cooling water supply and return water, the water flow rate of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the feedback signal of the fan operation, the temperature change rate of the inlet and outlet air dry bulb, the relative humidity change rate of the cooling tower inlet and outlet air, the temperature change rate of the cooling water supply and return water, the water flow change rate of the cooling water pipeline, and the pressure change rate of the cooling water pipeline satisfy the first preset condition:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry balls of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
Preferably, the step S13 further includes:
when the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference value between the temperature of the dry bulb of the inlet air of the cooling tower and the temperature of the dry bulb of the outlet air of the cooling tower, the difference value between the relative temperature of the inlet and the outlet air of the cooling tower and the relative humidity of the outlet air of the cooling tower and the difference value between the temperature of the return water of the cooling water and the temperature of the supplied water meet a second preset condition, fault information and a control signal are generated, and fault alarm is triggered;
the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, and the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, or the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or,
the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in the preset time period.
The invention also provides a device for automatically judging the fault of the cooling tower of the air conditioning system in the hospital, which comprises:
the monitoring and collecting module is used for monitoring and collecting the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time;
the calculating unit is used for calculating the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the inlet and outlet air relative humidity of the cooling tower, the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the water flow of the cooling water supply and return water, the change rate of the water temperature of the cooling water supply and return water, the change rate of the water flow of the cooling water supply and return water and the change rate of the pressure of the cooling water supply and return water according to the collected inlet and outlet air drying ball temperature of the cooling tower;
and the management control unit is used for generating fault information and control signals when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal, a fan operation feedback signal, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, and triggering fault alarm according to the control signals.
Preferably, the calculation unit includes:
and the calculation module is used for calculating the difference value between the air inlet dry bulb temperature of the cooling tower and the air outlet dry bulb temperature of the cooling tower, the difference value between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference value between the water return temperature of the cooling water and the water supply temperature according to the acquired air inlet and outlet dry bulb temperature of the cooling tower, the air inlet and outlet relative humidity of the cooling tower and the water supply return temperature of the cooling water.
Preferably, the fault information includes cooling tower power fault information, cooling tower network fault information, cooling tower fan fault information, cooling water valve fault information, excessive cooling tower opening number information and cooling water pipeline water flow abnormal information; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information;
the control signals comprise a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower opening excessive control signal and a cooling water pipeline water flow abnormal control signal;
the cooling water valve failure control signal comprises a cooling water valve opening failure control signal and a cooling water valve closing failure control signal.
Preferably, the first preset condition that the temperature of the inlet and outlet air dry bulb of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the feedback signal of the operation of the fan, the temperature change rate of the inlet and outlet air dry bulb, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry balls of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
Preferably, the control unit includes:
the control module is used for generating fault information and a control signal when the pressure of the cooling water pipeline, a fan operation feedback signal, the water flow of the cooling water pipeline, the difference value between the temperature of the air inlet dry bulb of the cooling tower and the temperature of the air outlet dry bulb of the cooling tower, the difference value between the relative temperature of the inlet and the outlet of the cooling tower and the relative humidity of the outlet of the cooling tower and the difference value between the temperature of return water of the cooling water and the temperature of water supply meet a second preset condition, and triggering fault alarm according to the control signal;
the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, and the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, or the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or,
the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in the preset time period.
The method and the device for automatically judging the faults of the cooling tower of the air conditioning system of the hospital have the following beneficial effects: the invention effectively solves the problem that the cooling tower fails to check, find and maintain in time, not only can realize energy saving of the cooling water system, but also can ensure normal and efficient operation of the cooling water system, reduce maintenance cost, improve timeliness, ensure thermal comfort of the air conditioning system and avoid energy waste.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow chart of a first embodiment of a method for automatically determining a fault of a cooling tower of a hospital air conditioning system according to the present invention;
fig. 2 is a logic block diagram of a first embodiment of an automatic determination device for a cooling tower fault of a hospital air conditioning system according to the present 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.
The invention is suitable for the field of central air conditioners in hospitals, and particularly relates to a method for remotely and automatically judging faults of a cooling tower in a refrigeration station in a hospital. Compared with the traditional method for fault maintenance and inspection lack of timeliness, the method disclosed by the invention has the advantages that the remote early warning and fault judgment are carried out through various sensors and execution component feedback signals installed on the cooling tower and background application software (such as an IBMS (Intelligent building management System)), only a dry bulb temperature sensor and a wet bulb temperature sensor are additionally installed at the proper positions of the existing cooling tower, and the cooling tower fan is started and stopped, a gear signal and a cooling water valve opening/closing/opening signal are fed back to an IBMS software platform through a wired/wireless network, so that the cooling tower with fault early warning or fault warning can be effectively screened, the fault reason can be found in time, the problem can be timely handled by a property manager, and the reliable and energy-saving operation of the cooling tower and a centralized air-conditioning refrigeration station can be guaranteed.
FIG. 1 is a schematic flow chart of an embodiment of a method for automatically judging a failure of a cooling tower of a hospital air-conditioning system according to the present invention, which can be implemented on an IBMS system, and is implemented by monitoring the operation status of the cooling tower system in real time and acquiring data of related parameters through signals fed back from sensors and execution components of the cooling tower installed in an operation system of the cooling tower of the hospital air-conditioning system, analyzing, calculating and processing the data of the parameters and the feedback signals, automatically detecting and judging the failure of the cooling tower system based on the analysis processing result, outputting corresponding failure information and control signals to trigger corresponding failure alarms, namely effectively identifying the cooling tower for failure early warning or failure alarm, finding the cause of the failure in time, and helping property managers to deal with the failure problems and maintenance in time, the reliable energy-saving operation of the cooling tower system and the centralized air-conditioning refrigeration station is ensured.
As shown in fig. 1, the method for automatically judging the failure of the cooling tower of the hospital air conditioning system of the embodiment comprises the following steps:
and S11, monitoring and acquiring the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply return water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time.
The temperature of the air inlet and outlet dry balls of the cooling tower comprises the temperature of the air inlet dry balls of the cooling tower and the temperature of the air outlet dry balls of the cooling tower. In this embodiment, the temperature of the air inlet dry bulb of the cooling tower and the temperature of the air outlet dry bulb of the cooling tower can adopt the same air temperature sensor to carry out real-time monitoring and data acquisition, and transmit data to the IBMS system in real time. The air temperature sensor for monitoring the temperature of the air inlet dry balls of the cooling tower can be arranged at the position, close to the filler, of the side air inlet on the periphery of the cooling tower, and the air temperature sensor for monitoring the temperature of the air outlet dry balls of the cooling tower can be arranged at the position, close to the air outlet of the fan at the top of the cooling tower.
The cooling tower inlet and outlet air relative humidity comprises cooling tower inlet air relative humidity and cooling tower outlet air relative humidity. In this embodiment, the cooling tower air inlet relative humidity and the cooling tower air outlet relative humidity can adopt the same humidity sensor to carry out real-time monitoring and data acquisition, and transmit data to the IBMS system in real time. The humidity sensor for monitoring the relative humidity of the inlet air of the cooling tower can be arranged at the position, close to the filler, of the inlet air on the side surface around the cooling tower, and the humidity sensor for monitoring the relative humidity of the outlet air of the cooling tower can be arranged at the position, close to the air outlet of the fan at the top of the cooling tower.
The cooling water supply and return water temperature comprises a cooling water supply temperature and a cooling water return water temperature. In this embodiment, the water supply temperature of the cooling tower and the water return temperature of the cooling tower can be monitored and data collected in real time by using the same water temperature sensor, and the data is transmitted to the IBMS system in real time. Wherein, the water temperature sensor is respectively arranged at the position of the straight pipe section of the water supply pipe of the cooling tower and the position of the straight pipe section of the water return pipe of the cooling tower.
The water flow of the cooling water pipeline can be monitored and data collected in real time through the water flow meter, wherein the water flow of the cooling water pipeline is the water flow of the straight pipe section of the water supply pipe of the cooling tower, and the water flow meter can be installed at the position of the straight pipe section of the water supply pipe of the cooling tower.
The cooling water main water flow rate is the water flow rate of the cooling water main pipeline, and the same water flow meter as the water flow meter for measuring the water flow rate of the cooling water pipeline can be adopted.
The pressure of the cooling water pipeline can be monitored and data can be acquired by a pressure sensor, wherein the pressure sensor can be arranged at the position of the straight pipe section of the water supply pipe of the cooling tower and behind the cooling water pump.
The cooling water valve feedback signal comprises a cooling water valve switch and an opening degree signal, the opening degree of the cooling water valve is monitored by a feedback device arranged in the cooling water valve and then converted into a corresponding signal to be fed back to the IBMS control system, wherein 0% represents that the cooling water valve is fully closed, and 100% represents that the cooling water valve is fully opened.
The fan operation feedback signal can be monitored and fed back by the fan self-contained operation state monitoring module when the cold radiation air conditioning system operates, namely the fan of the embodiment is internally provided with the monitoring module, and the monitoring module can monitor the operation state of the fan in real time and convert the corresponding signal to be fed back to the IBMS control system. The fan operation feedback signal is a digital signal, and may be, for example, 0 and 1, where 0 represents that the fan is stopped, and 1 represents that the fan is fully opened and normal, and when the fan feedback signal is a digital signal other than 0 and other than 1, it indicates that the fan feedback is an abnormal signal, in other words, the fan is abnormal.
It should be noted that, in this step, the acquisition and transmission of data by each sensor is a continuous and interval process, wherein the time interval of data acquisition can be preset, such as 1 minute, 2 minutes, 5 minutes or 15 minutes, and the invention is not limited in particular.
It can be understood that the signals fed back by the sensors and the execution units are transmitted to the IBMS control system, specifically to a processor (or a controller) having a data operation processing function in the IBMS control system, and the processor (or the controller) performs analysis processing, judgment, and the like on the data and the signals. The processor (or controller) includes, but is not limited to, a microprocessor, a microcontroller, a digital signal processor, a microcomputer or a central processing unit.
And S12, calculating the change rate of the temperature of the inlet and outlet air drying balls, the change rate of the inlet and outlet air relative humidity of the cooling tower, the change rate of the cooling water supply and return water temperature, the change rate of the cooling water pipeline water flow and the change rate of the cooling water pipeline pressure according to the collected inlet and outlet air drying ball temperature, the cooling tower inlet and outlet air relative humidity, the cooling water supply and return water temperature and the cooling water pipeline pressure.
In this step, it should be noted that the temperature change rate of the inlet/outlet air dry bulb of the cooling tower includes a temperature change rate of the inlet air dry bulb of the cooling tower and a temperature change rate of the outlet air dry bulb of the cooling tower. The cooling tower inlet and outlet air relative humidity comprises cooling tower inlet air relative humidity and cooling tower outlet air relative humidity. The change rate of the cooling water supply temperature and the cooling water return temperature comprises a change rate of the cooling water supply temperature and a change rate of the cooling water return temperature.
Furthermore, the change rate of the temperature of the dry bulb of the inlet air of the cooling tower can be obtained by performing difference operation on the temperature of the dry bulb of the inlet air of the cooling tower at the current moment and the temperature of the dry bulb of the inlet air of the cooling tower at the previous moment and then dividing the difference by a preset time interval. For example, assume that the temperature of the dry bulb of the cooling tower inlet air at the previous moment is Tt-1Air inlet dry ball of cooling tower at presentTemperature of TtIf the preset time interval is △ T, the change rate of the temperature of the dry bulb of the inlet air of the cooling tower is (T)t-1-Tt) And △ t, similarly, the change rate of other parameters can be calculated by the calculation method.
Preferably, step S12 further includes: and calculating the difference value between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower, the difference value between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower and the difference value between the temperature of the return water of the cooling water and the temperature of the supply water according to the acquired temperature of the dry air inlet ball and the temperature of the dry air outlet ball of the cooling tower, the acquired relative humidity of the air inlet of the cooling tower.
S13, when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the operation feedback signal of the fan, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, generating fault information and a control signal, and triggering fault alarm according to.
The fault information may include, for example, cooling tower power failure information, cooling tower network failure information, cooling tower fan failure information, cooling water valve failure information, excessive cooling tower opening number information, and cooling water pipeline water flow abnormality information; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information.
The control signals may include, for example, a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower open excess control signal, and a cooling water line water flow anomaly control signal. The fault control signal of the cooling water valve comprises a cooling water valve opening fault control signal and a cooling water valve closing fault control signal.
Preferably, in this embodiment, step S13 further includes:
and generating fault information and a control signal when the pressure of the cooling water pipeline, the operation feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the temperature of the air inlet dry ball of the cooling tower and the temperature of the air outlet dry ball of the cooling tower, the difference between the relative temperature of the air inlet and the air outlet of the cooling tower and the relative humidity of the air outlet of the cooling tower and the difference between the temperature of return water of the cooling water and the temperature of water supply meet a second preset condition, and triggering fault alarm according to the control signal.
Specifically, in step S13, the first preset condition and the second preset condition may be preset by the manager before the air conditioning system is turned on. For example, the administrator may set the first preset condition and the second preset condition in advance when the air conditioning system is first powered on, or may set the preset conditions by inputting a certain preset password during the operation of the central air conditioning system, and output a certain trigger condition to trigger the preset password during the operation. The first preset condition and the second preset condition may be stored by various storage devices, and each storage device may be constituted by one or more storage components.
Wherein, the cooling tower business turn over wind dry bulb temperature, cooling tower business turn over wind relative humidity, cooling water supply return water temperature, cooling water pipeline discharge, cooling water pipeline pressure, cooling water valve feedback signal, fan operation feedback signal, business turn over wind dry bulb temperature change rate, cooling tower business turn over wind relative humidity change rate, cooling water supply return water temperature change rate, cooling water pipeline discharge change rate and cooling water pipeline pressure change rate satisfy first preset condition and include:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry bulb of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
The pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in a preset time period.
In order to make the method of the present embodiment more clearly understood, the following describes in detail a specific control procedure of step S13 of the present embodiment.
If the temperature of the cooling tower air inlet dry bulb, the temperature of the cooling tower air outlet dry bulb, the cooling tower air inlet relative humidity, the cooling tower air outlet relative humidity, the cooling water supply temperature, the cooling water return water temperature, the cooling water pipeline water flow, the cooling water pipeline pressure, the cooling water valve feedback signal and the fan operation feedback signal which are acquired by the IBMS system at the current moment are all zero, the fact that the cooling tower has a power fault can be judged, power fault information and a power fault control signal are output, a power fault alarm is triggered according to the generated power fault control signal, the fact that a manager has the power fault is notified in real time is achieved, and the power fault information is notified to the manager.
Or, if the IBMS system is judged by calculation: the network fault alarm system comprises a cooling tower air inlet dry bulb temperature change rate, a cooling tower air outlet dry bulb temperature change rate, a cooling tower air inlet relative humidity change rate, a cooling tower air outlet relative humidity change rate, a cooling water supply water temperature change rate, a cooling water return water temperature change rate, a cooling water pipeline water flow rate change rate and a cooling water pipeline pressure change rate which are all zero, and therefore the occurrence of a network fault of the cooling tower can be judged, cooling tower network fault information and a cooling tower network fault control signal are output, a network fault alarm is triggered according to the generated network fault control signal, a manager is informed of the occurrence of the network fault in real time, and the network fault information is informed to the manager.
Or, if the IBMS system is judged by calculation: and if the machine-seeing operation feedback signal corresponding to the cooling tower is 1 and the absolute value of the difference value between the air inlet dry bulb temperature of the cooling tower and the air outlet dry bulb temperature of the cooling tower is less than 1 ℃, judging that the cooling tower has a fan fault, outputting fan fault information of the cooling tower and a fan fault control signal of the cooling tower, triggering a fan fault alarm according to the generated fan fault control signal, informing a manager of the occurrence of the fan fault of the cooling tower in real time, and informing the manager of the fan fault information. Or if the absolute value of the difference value between the relative humidity of the inlet air of the cooling tower and the relative humidity of the outlet air of the cooling tower is less than 5 percent; or the fan operation feedback signal is abnormal (namely the fan operation feedback signal is a signal which is not 0 but not 1), the condition that the fan fault occurs in the cooling tower can be judged.
Or, if the pressure of the cooling water pipeline acquired by the IBMS system is greater than the set upper limit value, the opening fault of the cooling water pipeline valve can be judged, and then the opening fault information of the cooling water pipeline valve and the opening fault control signal of the cooling water valve are output. Or if the fan operation feedback signal collected by the IBMS system is zero and the water flow of the corresponding cooling water pipeline is greater than 0, judging the closing fault of the valve of the cooling water pipeline, and outputting the closing fault information of the valve of the cooling water pipeline and the closing fault control signal of the valve of the cooling water pipeline.
Or, if the cooling water main flow collected by the IBMS system is within a preset range (for example, the preset range may be set such that the cooling water main flow is greater than 0 and smaller than a set value), and the difference between the cooling water return temperature and the cooling water supply temperature is kept less than 2 degrees celsius within a preset time period, it may be determined that the cooling tower has the information of the excessive opening number and the control signal of the excessive opening number of the cooling tower occurs.
Or if the difference value between the cooling water return temperature and the cooling water supply temperature collected by the IBMS system is kept to be more than 8 ℃ in a preset time period, judging that the cooling tower has abnormal cooling water pipeline water flow information and abnormal cooling water pipeline water flow control signals, and triggering abnormal cooling water pipeline water flow alarm according to the generated abnormal cooling water pipeline water flow control signals so as to prompt a manager to carry out corresponding overhaul and maintenance.
Fig. 2 is a logic block diagram of a first embodiment of the automatic determination device for a cooling tower fault of a hospital air conditioning system according to the present invention. In this embodiment, the automatic fault determination device for a cooling tower of an air conditioning system in a hospital includes:
and the monitoring and collecting module 11 is used for monitoring and collecting the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply return water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time.
The data monitored and collected by the monitoring and collecting module 11 is transmitted or fed back by various sensors and cooling tower execution components. Various types of sensors may include: any one or more of an air temperature sensor, a humidity sensor, a water temperature sensor, a water flow meter, a pressure sensor, a cooling water valve and a fan.
Furthermore, the temperature of the air inlet and outlet dry balls of the cooling tower comprises the temperature of the air inlet dry balls of the cooling tower and the temperature of the air outlet dry balls of the cooling tower. In this embodiment, the temperature of the air inlet dry bulb of the cooling tower and the temperature of the air outlet dry bulb of the cooling tower can adopt the same air temperature sensor to carry out real-time monitoring and data acquisition, and transmit data to the IBMS system in real time. The air temperature sensor for monitoring the temperature of the air inlet dry balls of the cooling tower can be arranged at the position, close to the filler, of the side air inlet on the periphery of the cooling tower, and the air temperature sensor for monitoring the temperature of the air outlet dry balls of the cooling tower can be arranged at the position, close to the air outlet of the fan at the top of the cooling tower.
The cooling tower inlet and outlet air relative humidity comprises cooling tower inlet air relative humidity and cooling tower outlet air relative humidity. In this embodiment, the cooling tower air inlet relative humidity and the cooling tower air outlet relative humidity can adopt the same humidity sensor to carry out real-time monitoring and data acquisition, and transmit data to the IBMS system in real time. The humidity sensor for monitoring the relative humidity of the inlet air of the cooling tower can be arranged at the position, close to the filler, of the inlet air on the side surface around the cooling tower, and the humidity sensor for monitoring the relative humidity of the outlet air of the cooling tower can be arranged at the position, close to the air outlet of the fan at the top of the cooling tower.
The cooling water supply and return water temperature comprises a cooling water supply temperature and a cooling water return water temperature. In this embodiment, the water supply temperature of the cooling tower and the water return temperature of the cooling tower can be monitored and data collected in real time by using the same water temperature sensor, and the data is transmitted to the IBMS system in real time. Wherein, the water temperature sensor is respectively arranged at the position of the straight pipe section of the water supply pipe of the cooling tower and the position of the straight pipe section of the water return pipe of the cooling tower.
The water flow of the cooling water pipeline can be monitored and data collected in real time through the water flow meter, wherein the water flow of the cooling water pipeline is the water flow of the straight pipe section of the water supply pipe of the cooling tower, and the water flow meter can be installed at the position of the straight pipe section of the water supply pipe of the cooling tower.
The cooling water main water flow rate is the water flow rate of the cooling water main pipeline, and the same water flow meter as the water flow meter for measuring the water flow rate of the cooling water pipeline can be adopted.
The pressure of the cooling water pipeline can be monitored and data can be acquired by a pressure sensor, wherein the pressure sensor can be arranged at the position of the straight pipe section of the water supply pipe of the cooling tower and behind the cooling water pump.
The cooling water valve feedback signal comprises a cooling water valve switch and an opening degree signal, the opening degree of the cooling water valve is monitored by a feedback device arranged in the cooling water valve and then converted into a corresponding signal to be fed back to the IBMS control system, wherein 0% represents that the cooling water valve is fully closed, and 100% represents that the cooling water valve is fully opened.
The fan operation feedback signal can be monitored and fed back by the fan self-contained operation state monitoring module when the cold radiation air conditioning system operates, namely the fan of the embodiment is internally provided with the monitoring module, and the monitoring module can monitor the operation state of the fan in real time and convert the corresponding signal to be fed back to the IBMS control system. The fan operation feedback signal is a digital signal, and may be, for example, 0 and 1, where 0 represents that the fan is stopped, and 1 represents that the fan is fully opened and normal, and when the fan feedback signal is a digital signal other than 0 and other than 1, it indicates that the fan feedback is an abnormal signal, in other words, the fan is abnormal.
It should be noted that, in this step, the acquisition and transmission of data by each sensor is a continuous and interval process, wherein the time interval of data acquisition can be preset, such as 1 minute, 2 minutes, 5 minutes or 15 minutes, and the invention is not limited in particular.
It can be understood that the signals fed back by the sensors and the execution units are transmitted to the IBMS control system, specifically to a processor (or a controller) having a data operation processing function in the IBMS control system, and the processor (or the controller) performs analysis processing, judgment, and the like on the data and the signals. The processor (or controller) includes, but is not limited to, a microprocessor, a microcontroller, a digital signal processor, a microcomputer or a central processing unit.
And the calculating unit 12 is used for calculating the change rate of the temperature of the inlet/outlet air drying balls, the change rate of the relative humidity of the inlet/outlet air of the cooling tower, the change rate of the temperature of the inlet/outlet air supply/return water of the cooling tower, the change rate of the water flow of the cooling water supply/return water, the change rate of the water flow of the cooling water pipeline and the change rate of the pressure of the cooling water pipeline according to the collected inlet/outlet air drying ball temperature, the inlet/outlet air relative humidity of the cooling tower, the water flow of the cooling water pipeline.
It should be noted that the temperature change rate of the inlet/outlet air dry bulb of the cooling tower includes the temperature change rate of the inlet air dry bulb of the cooling tower and the temperature change rate of the outlet air dry bulb of the cooling tower. The cooling tower inlet and outlet air relative humidity comprises cooling tower inlet air relative humidity and cooling tower outlet air relative humidity. The change rate of the cooling water supply temperature and the cooling water return temperature comprises a change rate of the cooling water supply temperature and a change rate of the cooling water return temperature.
Furthermore, the change rate of the temperature of the dry bulb of the inlet air of the cooling tower can be obtained by performing difference operation on the temperature of the dry bulb of the inlet air of the cooling tower at the current moment and the temperature of the dry bulb of the inlet air of the cooling tower at the previous moment and then dividing the difference by a preset time interval. For example, assume that the temperature of the dry bulb of the cooling tower inlet air at the previous moment is Tt-1The temperature of the air inlet dry bulb of the cooling tower at the current moment is TtIf the preset time interval is △ T, the change rate of the temperature of the dry bulb of the inlet air of the cooling tower is (T)t-1-Tt) And △ t, similarly, the change rate of other parameters can be calculated by the calculation method.
Preferably, in this embodiment, the calculating unit 12 includes:
and the calculating module 1201 is configured to calculate a difference between the temperature of the inlet air dry bulb of the cooling tower and the temperature of the outlet air dry bulb of the cooling tower, a difference between the inlet air relative humidity of the cooling tower and the outlet air relative humidity of the cooling tower, and a difference between the temperature of the return water of the cooling water and the temperature of the supply water according to the acquired inlet air dry bulb temperature of the cooling tower, inlet air relative humidity of the cooling tower, and the temperature of the return water of the cooling water.
And the management control unit 13 is used for generating fault information and a control signal when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal, a fan operation feedback signal, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, and triggering fault alarm according to the control.
The fault information comprises cooling tower power fault information, cooling tower network fault information, cooling tower fan fault information, cooling water valve fault information, excessive cooling tower opening quantity information and cooling water pipeline water flow abnormal information; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information.
The control signals comprise a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower opening excessive control signal and a cooling water pipeline water flow abnormal control signal. The fault control signal of the cooling water valve comprises a cooling water valve opening fault control signal and a cooling water valve closing fault control signal.
The control unit includes:
the control module 1301 is used for generating fault information and a control signal when the pressure of the cooling water pipeline, the operation feedback signal of the fan, the water flow of the cooling water pipeline, the difference value between the temperature of the inlet air dry bulb of the cooling tower and the temperature of the outlet air dry bulb of the cooling tower, the difference value between the inlet and outlet relative temperatures of the cooling tower and the outlet air relative humidity of the cooling tower and the difference value between the return water temperature of the cooling water and the water supply temperature meet a second preset condition, and triggering fault alarm according to the control signal;
the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in a preset time period.
Specifically, the first preset condition and the second preset condition can be preset by a manager before the air conditioning system is started to operate. For example, the administrator may set the first preset condition and the second preset condition in advance when the air conditioning system is first powered on, or may set the preset conditions by inputting a certain preset password during the operation of the central air conditioning system, and output a certain trigger condition to trigger the preset password during the operation. The first preset condition and the second preset condition may be stored by various storage devices, and each storage device may be constituted by one or more storage components.
Wherein, the cooling tower business turn over wind dry bulb temperature, cooling tower business turn over wind relative humidity, cooling water supply return water temperature, cooling water pipeline discharge, cooling water pipeline pressure, cooling water valve feedback signal, fan operation feedback signal, business turn over wind dry bulb temperature change rate, cooling tower business turn over wind relative humidity change rate, cooling water supply return water temperature change rate, cooling water pipeline discharge change rate and cooling water pipeline pressure change rate satisfy first preset condition and include:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry bulb of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
The pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in a preset time period.
In order to make the method of the present embodiment more clearly understood, the following describes a specific control procedure of the management control unit 13 of the present embodiment in detail.
If the cooling tower air inlet dry bulb temperature, the cooling tower air outlet dry bulb temperature, the cooling tower air inlet relative humidity, the cooling tower air outlet relative humidity, the cooling water supply temperature, the cooling water return water temperature, the cooling water pipeline water flow rate, the cooling water pipeline pressure, the cooling water valve feedback signal and the fan operation feedback signal of the current moment are all zero, which are acquired by a management control unit 13 in the IBMS system, the power failure of the cooling tower can be judged, and then power failure information and a power failure control signal are output, and a power failure alarm is triggered according to the generated power failure control signal, so that a manager is informed of the power failure in real time, and the power failure information is informed to the manager.
Alternatively, if the management control unit 13 in the IBMS system is calculated and judged: the network fault alarm system comprises a cooling tower air inlet dry bulb temperature change rate, a cooling tower air outlet dry bulb temperature change rate, a cooling tower air inlet relative humidity change rate, a cooling tower air outlet relative humidity change rate, a cooling water supply water temperature change rate, a cooling water return water temperature change rate, a cooling water pipeline water flow rate change rate and a cooling water pipeline pressure change rate which are all zero, and therefore the occurrence of a network fault of the cooling tower can be judged, cooling tower network fault information and a cooling tower network fault control signal are output, a network fault alarm is triggered according to the generated network fault control signal, a manager is informed of the occurrence of the network fault in real time, and the network fault information is informed to the manager.
Alternatively, if the control module 1301 in the management control unit 13 of the IBMS system determines through calculation: and if the machine-seeing operation feedback signal corresponding to the cooling tower is 1 and the absolute value of the difference value between the air inlet dry bulb temperature of the cooling tower and the air outlet dry bulb temperature of the cooling tower is less than 1 ℃, judging that the cooling tower has a fan fault, outputting fan fault information of the cooling tower and a fan fault control signal of the cooling tower, triggering a fan fault alarm according to the generated fan fault control signal, informing a manager of the occurrence of the fan fault of the cooling tower in real time, and informing the manager of the fan fault information. Or if the absolute value of the difference value between the relative humidity of the inlet air of the cooling tower and the relative humidity of the outlet air of the cooling tower is less than 5 percent; or the fan operation feedback signal is abnormal (namely the fan operation feedback signal is a signal which is not 0 but not 1), the condition that the fan fault occurs in the cooling tower can be judged.
Or, if the pressure of the cooling water pipeline acquired by the control module 1301 in the management control unit 13 of the IBMS system is greater than the set upper limit value, it may be determined that the cooling water pipeline valve has an open fault, and then the cooling water pipeline valve open fault information and the cooling water valve open fault control signal are output. Or if the fan operation feedback signal collected by the IBMS system is zero and the water flow of the corresponding cooling water pipeline is greater than 0, judging the closing fault of the valve of the cooling water pipeline, and outputting the closing fault information of the valve of the cooling water pipeline and the closing fault control signal of the valve of the cooling water pipeline.
Or, if the cooling water main water flow collected by the control module 1301 in the management control unit 13 of the IBMS system is within a preset range (for example, the preset range may be set such that the cooling water main water flow is greater than 0 and smaller than a set value), and the difference between the cooling water return water temperature and the cooling water supply water temperature is kept less than 2 degrees celsius within a preset time period, it may be determined that the cooling tower has the information of the excessive opening number and the control signal of the excessive opening number of the cooling tower occurs.
Or, if the difference between the cooling water return temperature and the cooling water supply temperature collected by the control module 1301 in the management control unit 13 of the IBMS system is kept at more than 8 ℃ within a preset time period, it may be determined that the cooling tower has abnormal cooling water pipeline water flow information and abnormal cooling water pipeline water flow control signals, and the abnormal cooling water pipeline water flow control signals trigger an abnormal cooling water pipeline water flow alarm to prompt an administrator to perform corresponding overhaul and maintenance.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. A method for automatically judging the fault of a cooling tower of an air conditioning system in a hospital is characterized by comprising the following steps:
s11, monitoring and acquiring the temperature of air inlet and outlet dry balls of the cooling tower, the relative humidity of air inlet and outlet of the cooling tower, the temperature of cooling water supply and return water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time;
s12, calculating the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the inlet and outlet air relative humidity of the cooling tower, the change rate of the temperature of the cooling water supply return water, the change rate of the water flow of the cooling water pipeline and the change rate of the pressure of the cooling water pipeline according to the collected inlet and outlet air drying ball temperature of the cooling tower, inlet and outlet air relative humidity of the cooling;
s13, generating fault information and control signals when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the operation feedback signal of the fan, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, and triggering fault alarm according to the control signals.
2. The method for automatically judging the failure of the cooling tower of the air conditioning system of the hospital according to claim 1, wherein said step S12 further comprises:
and calculating the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower, the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower and the difference between the temperature of the return water of the cooling water and the temperature of the supply water according to the acquired temperature of the dry air inlet ball and the temperature of the dry air outlet ball of the cooling tower, the acquired relative humidity of the air inlet of the cooling tower and the.
3. The method for automatically judging the failure of the cooling tower of the air conditioning system of the hospital according to the claim 1, wherein the failure information comprises the failure information of the power of the cooling tower, the failure information of the network of the cooling tower, the failure information of the fan of the cooling tower, the failure information of the valve of the cooling water, the information of the excessive opening number of the cooling tower and the abnormal information of the water flow of the pipeline of the cooling water; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information;
the control signals comprise a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower opening excessive control signal and a cooling water pipeline water flow abnormal control signal;
the cooling water valve failure control signal comprises a cooling water valve opening failure control signal and a cooling water valve closing failure control signal.
4. The method for automatically determining the failure of the cooling tower of the hospital air-conditioning system as claimed in claim 3, wherein in the step S13, the first preset condition being satisfied by the temperature of the inlet/outlet air dry bulb of the cooling tower, the relative humidity of the inlet/outlet air of the cooling tower, the temperature of the supply/return water of the cooling water, the water flow rate of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the cooling water valve, the feedback signal of the fan operation, the temperature change rate of the inlet/outlet air dry bulb, the relative humidity change rate of the inlet/outlet air of the cooling tower, the water flow rate of the cooling water supply/return water, the water flow rate of the cooling water pipeline, and the pressure change rate:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry balls of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
5. The method for automatically judging the failure of the cooling tower of the air conditioning system for hospitals according to the claim 2, wherein said step S13 further comprises:
when the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference value between the temperature of the dry bulb of the inlet air of the cooling tower and the temperature of the dry bulb of the outlet air of the cooling tower, the difference value between the relative temperature of the inlet and the outlet air of the cooling tower and the relative humidity of the outlet air of the cooling tower and the difference value between the temperature of the return water of the cooling water and the temperature of the supplied water meet a second preset condition, fault information and a control signal are generated, and fault alarm is triggered;
the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, and the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, or the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or,
the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in the preset time period.
6. The utility model provides a hospital air conditioning system cooling tower trouble automatic judgement device which characterized in that includes:
the monitoring and collecting module is used for monitoring and collecting the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of a cooling water pipeline, the water flow of a cooling water main pipe, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal in real time;
the calculating unit is used for calculating the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the inlet and outlet air relative humidity of the cooling tower, the change rate of the temperature of the inlet and outlet air drying balls of the cooling tower, the change rate of the water flow of the cooling water supply and return water, the change rate of the water temperature of the cooling water supply and return water, the change rate of the water flow of the cooling water supply and return water and the change rate of the pressure of the cooling water supply and return water according to the collected inlet and outlet air drying ball temperature of the cooling tower;
and the management control unit is used for generating fault information and control signals when the temperature of the inlet and outlet air dry balls of the cooling tower, the relative humidity of the inlet and outlet air of the cooling tower, the temperature of the supply and return water of the cooling water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal, a fan operation feedback signal, the temperature change rate of the inlet and outlet air dry balls, the relative humidity change rate of the inlet and outlet air of the cooling tower, the temperature change rate of the supply and return water of the cooling water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline meet a first preset condition, and triggering fault alarm according to the control signals.
7. The hospital air conditioning system cooling tower failure automatic judgment device according to claim 6, characterized in that said calculation unit comprises:
and the calculation module is used for calculating the difference value between the air inlet dry bulb temperature of the cooling tower and the air outlet dry bulb temperature of the cooling tower, the difference value between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference value between the water return temperature of the cooling water and the water supply temperature according to the acquired air inlet and outlet dry bulb temperature of the cooling tower, the air inlet and outlet relative humidity of the cooling tower and the water supply return temperature of the cooling water.
8. The hospital air-conditioning system cooling tower fault automatic judgment device according to claim 6, wherein the fault information includes cooling tower power fault information, cooling tower network fault information, cooling tower fan fault information, cooling water valve fault information, excessive cooling tower opening number information and cooling water pipeline water flow abnormality information; the cooling water valve fault information comprises cooling water valve opening fault information and cooling water valve closing fault information;
the control signals comprise a cooling tower power failure control signal, a cooling tower network failure control signal, a cooling tower fan failure control signal, a cooling water valve failure control signal, a cooling tower opening excessive control signal and a cooling water pipeline water flow abnormal control signal;
the cooling water valve failure control signal comprises a cooling water valve opening failure control signal and a cooling water valve closing failure control signal.
9. The device for automatically judging the failure of the cooling tower of the hospital air-conditioning system according to claim 6, wherein the first preset condition of the temperature of the inlet/outlet air dry bulb of the cooling tower, the relative humidity of the inlet/outlet air of the cooling tower, the temperature of the supply/return water of the cooling water, the water flow of the cooling water pipeline, the pressure of the cooling water pipeline, the feedback signal of the valve of the cooling water, the operation feedback signal of the fan, the change rate of the temperature of the inlet/outlet air dry bulb, the change rate of the relative humidity of the inlet/outlet air of the cooling tower, the change rate of the temperature of the supply/return water of the cooling water, the change rate of the water flow of the:
the temperature of the air inlet and outlet dry balls of the cooling tower, the relative humidity of the air inlet and outlet of the cooling tower, the temperature of the cooling water supply and return water, the water flow of a cooling water pipeline, the pressure of the cooling water pipeline, a cooling water valve feedback signal and a fan operation feedback signal are all zero; or
The temperature change rate of the air inlet and outlet dry balls of the cooling tower, the relative humidity change rate of the air inlet and outlet of the cooling tower, the temperature change rate of the cooling water supply return water, the water flow change rate of the cooling water pipeline and the pressure change rate of the cooling water pipeline are all zero.
10. The hospital air conditioning system cooling tower failure automatic judgment device according to claim 7, characterized in that said control unit comprises:
the control module is used for generating fault information and a control signal when the pressure of the cooling water pipeline, a fan operation feedback signal, the water flow of the cooling water pipeline, the difference value between the temperature of the air inlet dry bulb of the cooling tower and the temperature of the air outlet dry bulb of the cooling tower, the difference value between the relative temperature of the inlet and the outlet of the cooling tower and the relative humidity of the outlet of the cooling tower and the difference value between the temperature of return water of the cooling water and the temperature of water supply meet a second preset condition, and triggering fault alarm according to the control signal;
the pressure of the cooling water pipeline, the running feedback signal of the fan, the water flow of the cooling water pipeline, the difference between the air inlet dry-bulb temperature of the cooling tower and the air outlet dry-bulb temperature of the cooling tower, the difference between the air inlet relative humidity of the cooling tower and the air outlet relative humidity of the cooling tower and the difference between the return water temperature of the cooling water and the water supply temperature meet second preset conditions, and the second preset conditions comprise the following steps:
the fan operation feedback signal is 1, and the absolute value of the difference between the temperature of the dry air inlet ball of the cooling tower and the temperature of the dry air outlet ball of the cooling tower is less than 1 ℃, or the absolute value of the difference between the relative humidity of the air inlet of the cooling tower and the relative humidity of the air outlet of the cooling tower is less than 5%, or the fan operation feedback signal is abnormal;
or,
the pressure of the cooling water pipeline is greater than a set upper limit value; or
The fan operation feedback signal is zero, and the water flow of the cooling water pipeline is more than 0; or
The water flow of the cooling water main pipe is in a preset range, and the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be less than 2 ℃ in a preset time period; or
And the difference value between the return water temperature of the cooling water and the water supply temperature of the cooling water is kept to be more than 8 ℃ in the preset time period.
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