CN113390162A - Alarm system for subway central air-conditioning system - Google Patents
Alarm system for subway central air-conditioning system Download PDFInfo
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- CN113390162A CN113390162A CN202110738307.1A CN202110738307A CN113390162A CN 113390162 A CN113390162 A CN 113390162A CN 202110738307 A CN202110738307 A CN 202110738307A CN 113390162 A CN113390162 A CN 113390162A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- 238000001816 cooling Methods 0.000 claims abstract description 104
- 239000000498 cooling water Substances 0.000 claims description 58
- 238000007710 freezing Methods 0.000 claims description 21
- 230000008014 freezing Effects 0.000 claims description 21
- 238000013459 approach Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 21
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Abstract
The invention discloses an alarm system for a central air-conditioning system of a subway, which comprises a sub-health alarm device, a fault alarm device and a sensor multi-point consistency early warning device, wherein the sub-health alarm device comprises a host alarm module, a water pump alarm module and a cooling tower alarm module. Through the mode, the system can judge abnormal operation of the subway central air-conditioning system, alarm faults and early warn multi-point consistency of the sensor, so that the alarm of the subway central air-conditioning system is comprehensively and perfectly realized, the daily operation and maintenance level of the subway central air-conditioning system is greatly improved, and the cooling reliability is ensured; and the alarm system can remind operation and maintenance personnel to maintain the equipment, reduce the labor intensity of the operation and maintenance personnel and realize intelligent operation and maintenance and intelligent professional management of the subway central air-conditioning system.
Description
Technical Field
The invention relates to the technical field of central air-conditioning fault alarming, in particular to an alarming system for a subway central air-conditioning system.
Background
The subway central air-conditioning system comprises a host machine, a cooling water pump, a freezing water pump, a cooling tower, an air cabinet and other equipment, is a strong-comprehensive and complex electromechanical system, integrates knowledge application of subjects such as thermodynamics, hydrodynamics, mechanical principle, electric dragging, automatic control and the like, and is particularly important for intelligent operation and maintenance of public traffic intensive air-conditioning systems such as rail transit and the like because four subsystems such as wind, water, electricity and automatic control are mutually associated and interact in the operation process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an alarm system for a central air-conditioning system of a subway, which can solve the technical problems.
(II) technical scheme
In order to solve the technical problems, the invention provides the following technical scheme: an alarm system for a subway central air-conditioning system comprises a host, a cooling water pump, a chilled water pump, a cooling tower and an air cabinet, wherein the alarm system comprises a sub-health alarm device, a fault alarm device and a sensor multi-point consistency early warning device, wherein the sub-health alarm device comprises a host alarm module, a water pump alarm module and a cooling tower alarm module; the host alarm module is used for judging whether the host condenser approximation degree is continuously greater than or equal to a preset condenser approximation degree threshold value within a preset time period, and if so, alarming; the host alarm module is also used for judging whether the approach degree of the host evaporator is continuously greater than or equal to a preset evaporator approach degree threshold value within a preset time period, and if so, alarming; the water pump alarm module is used for judging whether the input power of the cooling water pump is continuously less than or equal to a preset minimum power value of the cooling water pump within a preset time period, and if so, alarming; the water pump alarm module is also used for judging whether the input power of the cooling water pump is continuously greater than or equal to the preset highest power value of the cooling water pump within a preset time period, and if so, alarming; the water pump alarm module is also used for judging whether the input power of the chilled water pump is continuously less than or equal to the preset minimum power value of the chilled water pump within a preset time period, and if so, alarming; the water pump alarm module is also used for judging whether the input power of the chilled water pump is continuously greater than or equal to the preset highest power value of the chilled water pump within a preset time period or not, and if so, alarming; the cooling tower alarm module is used for judging whether the approximation degree of the cooling tower is continuously greater than or equal to a preset cooling tower approximation degree threshold value within a preset time period or not, and alarming if the approximation degree of the cooling tower is continuously greater than or equal to the preset cooling tower approximation degree threshold value; the cooling tower alarm module is also used for judging whether the fan input power of the cooling tower is continuously greater than or equal to the preset highest power value of the cooling tower fan within a preset time period, and if so, alarming; the cooling tower alarm module is also used for judging whether the fan input power of the cooling tower is continuously less than or equal to the preset minimum power value of the cooling tower fan within a preset time period, and if so, alarming; the fault alarm device is used for judging whether a sensor fault, an equipment fault, a valve fault, a communication fault or a system operation parameter fault exists or not, and if so, alarming. The sensor multi-point consistency early warning device is used for judging whether the temperature errors of the cooling water and the chilled water exceed the standard or not, and if yes, alarming.
Preferably, the cooling tower alarm module is further configured to determine whether the fan frequency difference of each running cooling tower is continuously greater than or equal to a preset fan frequency difference threshold value within a preset time period, and if so, alarm.
Preferably, the cooling tower alarm module is further configured to determine whether the accumulated operation time of the cooling tower is greater than or equal to a preset accumulated operation time threshold of the cooling tower, and alarm if the accumulated operation time of the cooling tower is greater than or equal to the preset accumulated operation time threshold of the cooling tower; the cooling tower alarm module is also used for judging whether the water level of the cooling tower is lower than a preset water level threshold value or not, and if so, alarming.
Preferably, the sub-health alarm device further comprises a wind cabinet alarm module; the air cabinet alarm module is used for judging whether the input power of the fan of the air cabinet is continuously less than or equal to the preset minimum power value of the fan of the air cabinet within a preset time period, and if so, alarming; the air cabinet alarm module is also used for judging whether the input power of the fan of the air cabinet is continuously greater than or equal to the preset maximum power value of the fan of the air cabinet within a preset time period, and if so, alarming; the air cabinet alarm module is also used for judging whether the temperature difference between the inlet air and the return air is continuously less than or equal to a preset inlet air and return air temperature difference threshold value within a preset time period, and giving an alarm if the temperature difference between the inlet air and the return air is less than or equal to the preset inlet air and return air temperature difference threshold value; the air cabinet alarm module is also used for judging whether the accumulated operation time of the fan of the air cabinet is greater than or equal to a preset threshold value of the accumulated operation time of the fan of the air cabinet, and if so, alarming.
Preferably, the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the cooling return water side of the host is continuously smaller than or equal to a preset temperature difference threshold value of the cooling return water side of the host in a preset time period, and if so, giving an alarm; the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the cooling water outlet side of the main machine is continuously smaller than or equal to a preset temperature difference threshold value of the cooling water outlet side of the main machine in a preset time period, and if so, giving an alarm; the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the freezing backwater side of the host is continuously smaller than or equal to a preset temperature difference threshold value of the freezing backwater side of the host in a preset time period, and if so, giving an alarm; the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the freezing water outlet side of the main machine is continuously smaller than or equal to a preset temperature difference threshold value of the freezing water outlet side of the main machine in a preset time period, and if so, giving an alarm.
Preferably, the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the return water side of the cooling water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the return water side of the cooling water main pipe in a preset time period, and if so, giving an alarm; the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the return water side of the chilled water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the return water side of the chilled water main pipe in a preset time period, and if so, giving an alarm; the sensor multi-point consistency early warning device is specifically used for judging whether the temperature difference of the water outlet side of the chilled water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the water outlet side of the chilled water main pipe in a preset time period, and if yes, giving an alarm.
Preferably, the fault alarm device is specifically configured to determine whether a measurement value of each sensor of the subway central air conditioning system exceeds a preset normal measurement range of the sensor, and if so, perform an alarm.
Preferably, the fault alarm device is specifically used for judging whether a frequency converter of each device of the subway central air-conditioning system has a fault, and if so, alarming.
Preferably, the fault alarm device is specifically configured to alarm if no signal indicating that the valve is in place or closed is received after the preset time period of opening or closing of the valve is determined.
Preferably, the fault alarm device is specifically used for judging whether a communication fault exists in a frequency converter or an ammeter of each device of the subway central air-conditioning system, and if yes, alarming; the fault alarm device is specifically used for judging whether the chilled water flow of the host is continuously smaller than a preset chilled water flow threshold value within a preset time period, and if so, giving an alarm; the fault alarm device is specifically used for judging whether the cooling water flow of the host is continuously smaller than a preset cooling water flow threshold value within a preset time period, and if so, alarming.
(III) advantageous effects
Compared with the prior art, the invention provides an alarm system for a central air-conditioning system of a subway, which has the following beneficial effects: the alarm system comprises a sub-health alarm device, a fault alarm device and a sensor multi-point consistency early warning device, wherein the sub-health alarm device can judge abnormal operation, the fault alarm device can judge whether a sensor fault, an equipment fault, a valve fault, a communication fault or a system operation parameter fault exists, and the sensor multi-point consistency early warning device can judge whether the temperature errors of cooling water and chilled water exceed the standard or not, so that the invention can comprehensively and perfectly carry out fault alarm on the subway central air-conditioning system, greatly improve the daily operation and maintenance level of the subway central air-conditioning system and ensure the reliability of cooling; and the alarm system can remind operation and maintenance personnel to maintain the equipment, reduce the labor intensity of the operation and maintenance personnel and realize intelligent operation and maintenance and intelligent professional management of the subway central air-conditioning system.
Drawings
FIG. 1 is a schematic block diagram of an alarm system for a central air conditioning system of a subway in accordance with the present invention;
fig. 2 is a schematic block diagram of the sub-health warning device of 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 subway central air-conditioning system comprises a host, a cooling water pump, a chilled water pump, a cooling tower and an air cabinet. The invention discloses an alarm system for a subway central air-conditioning system, which comprises a sub-health alarm device 1, a fault alarm device 2 and a sensor multi-point consistency early warning device 3, wherein the sub-health alarm device 1 comprises a host alarm module 11, a water pump alarm module 12 and a cooling tower alarm module 13.
The host alarm module 11 is configured to determine whether the host condenser approach is continuously greater than or equal to a preset condenser approach threshold within a preset time period, where the host condenser approach is a host condenser refrigerant temperature-a host cooling outlet water temperature, and if so, alarm: the approach degree of the main machine condenser is high, and the condenser is recommended to be cleaned; for example, the approach degree of the main machine condenser is more than or equal to 2.5 ℃, and the duration is 30 minutes, an alarm is given correspondingly. The host alarm module 11 is further configured to determine whether the host evaporator approach is continuously greater than or equal to a preset evaporator approach threshold within a preset time period, where the host evaporator approach is the host chilled water temperature — the weather station wet bulb temperature, and if so, alarm: the approach degree of the host evaporator is high, and the evaporator is recommended to be cleaned; for example, the approach degree of the host evaporator is more than or equal to 2.5 ℃, and the duration is 30 minutes, an alarm is given correspondingly.
In addition, because the cooling water system is in an open circulation mode, the main machine condenser is easy to have sludge and scale, the cooling heat exchange capacity is influenced, and the COP of the main machine is seriously reduced and the high-pressure protection shutdown is caused in serious cases, so the main machine alarm module 11 is also used for judging whether the actual heat exchange approximation degree of the main machine condenser is greater than or equal to a preset main machine condenser heat exchange approximation degree threshold value, and if so, giving an alarm: reminding the host condenser to be cleaned; and the actual heat exchange approximation degree of the main machine condenser is equal to the actual heat exchange temperature of the main machine condenser-the main machine cooling outlet water temperature. For example, the actual heat exchange approximation degree of the main machine condenser is more than or equal to 2.5 ℃, and the main machine condenser is reminded to be cleaned.
The water pump alarm module 12 is configured to determine whether the input power of the cooling water pump is continuously less than or equal to a preset minimum power value of the cooling water pump within a preset time period, and if so, alarm: the filter of the cooling water pump is dirty or the cooling water pump has mechanical faults (such as pump blades and the like), and the maintenance is recommended; for example, if the input power of the cooling water pump is less than or equal to 80% of the rated power of the cooling water pump and the duration time is 10 minutes, an alarm is given correspondingly. The water pump alarm module 12 is further configured to determine whether the input power of the cooling water pump is continuously greater than or equal to a preset maximum power value of the cooling water pump within a preset time period, and if so, alarm: the flow of the cooling water pump is overlarge (possibly the opening of a valve is overlarge), a water filter is damaged or the cooling water pump fails, and the maintenance is recommended; for example, if the input power of the cooling water pump is larger than or equal to the rated power of the cooling water pump by 105 percent and the duration is 5 minutes, an alarm is given correspondingly.
The water pump alarm module 12 is further configured to determine whether the input power of the chilled water pump is continuously less than or equal to a preset minimum power value of the chilled water pump within a preset time period, and alarm if yes; the water pump alarm module 12 is further configured to determine whether the input power of the chilled water pump is continuously greater than or equal to a preset maximum power value of the chilled water pump within a preset time period, and alarm if yes.
The cooling tower alarm module 13 is configured to determine whether the approximation degree of the cooling tower is continuously greater than or equal to a preset threshold value of the approximation degree of the cooling tower within a preset time period, and if so, alarm: the cooling tower has poor heat dissipation and is recommended to be overhauled; for example, the approximation degree of the cooling tower is more than or equal to 4.0 ℃, and the duration is 30 minutes, an alarm is given correspondingly. The cooling tower alarm module 13 is further configured to determine whether the fan input power of the cooling tower is continuously greater than or equal to a preset maximum power value of the fan of the cooling tower within a preset time period, where the preset maximum power value of the fan of the cooling tower is (the preset coefficient is greater than 1) rated power calculated by the fan of the cooling tower, the fan of the cooling tower calculates (the operating frequency of the motor of the cooling tower/50) rated power input by the fan of the cooling tower, and if so, the cooling tower alarm module gives an alarm: the motor fault that the angle of the fan blade of the cooling tower is larger is recommended to be maintained; for example, the operation frequency of the motor of the cooling tower is 50Hz, the input power of the fan of the cooling tower is larger than or equal to the rated power of 105 percent calculated by the fan of the cooling tower, and the alarm is given after the duration of 5 minutes. The cooling tower alarm module 13 is further configured to determine whether the fan input power of the cooling tower is continuously less than or equal to a preset cooling tower fan minimum power value within a preset time period, where the preset cooling tower fan minimum power value is the cooling tower fan calculation rated power (less than a preset coefficient of 1), and if so, alarm: the belt of the cooling tower slips or the angle of the fan blade is smaller, and the maintenance is recommended; for example, the input power of the fan of the cooling tower is less than or equal to 80 percent of the rated power of the fan of the cooling tower, and the alarm is given out when the rated power lasts for 10 minutes.
In addition, the cooling tower alarm module 13 is further configured to determine whether the fan frequency difference of each running cooling tower is continuously greater than or equal to a preset fan frequency difference threshold within a preset time period, and if so, perform an alarm: and the water distribution of the cooling tower is unbalanced, and the maintenance is recommended. For example, when the cooling tower A, B, C is running and the preset fan frequency difference threshold is 5Hz, where the fan frequency of a is 6Hz higher than that of B, B is 5Hz higher than that of C, and lasts for 30 minutes, an alarm is issued.
In addition, the cooling tower alarm module 13 is further configured to determine whether the accumulated operation time of the cooling tower is greater than or equal to a preset accumulated operation time threshold of the cooling tower, and if so, alarm: the running time of a single cooling tower driven by a belt is close to the service life, a new belt is recommended to be replaced, and the time is accumulated again after replacement and resetting; for example, the preset cumulative operation time threshold of the cooling tower is 4000 hours. The cooling tower alarm module 13 is further configured to determine whether the water level of the cooling tower is lower than a preset water level threshold, and if so, alarm: reminding maintenance personnel that the cooling tower is at a low water level; the water level monitor is installed on a water pan of the cooling tower to obtain the water level of the cooling tower.
In addition, the sub-health warning device 1 further comprises a wind cabinet warning module 14.
The wind cabinet alarm module 14 is used for judging whether the fan input power of the wind cabinet is continuously less than or equal to a preset minimum power value of the wind cabinet fan within a preset time period, wherein the preset minimum power value of the wind cabinet fan is equal to a rated power of the wind cabinet fan (less than a preset coefficient of 1), and if so, the wind cabinet alarm module gives an alarm: and (5) the dust net is dirty and blocked or a fan belt of the air cabinet slips, and the maintenance is recommended. For example, the input power of the fan of the wind cabinet is less than or equal to 80% of the rated power of the fan of the wind cabinet, and the alarm is given out after the duration of 10 minutes.
The wind cabinet alarm module 14 is further configured to determine whether the input power of the wind cabinet fan is continuously greater than or equal to a preset maximum power value of the wind cabinet fan within a preset time period, where the preset maximum power value of the wind cabinet fan is equal to a rated power of the wind cabinet fan (greater than a preset coefficient of 1), and if so, alarm: and (4) suggesting the maintenance due to the over-tight belt of the fan of the air cabinet or the failure of the motor. For example, if the input power of the fan of the wind cabinet is larger than or equal to the rated power of the fan of the wind cabinet by 105 percent and the duration is 5 minutes, the alarm is given.
The air cabinet alarm module 14 is also used for judging whether the air inlet and return temperature difference is continuously less than or equal to a preset air inlet and return temperature difference threshold value within a preset time period, and if so, giving an alarm: and (4) the frozen water proportional-integral valve is not opened or the air quantity of a fan of the air cabinet is too large, and the maintenance is recommended. For example, if the temperature difference between the inlet air and the return air is less than or equal to 7 ℃ and the duration time is 5 minutes, an alarm is given.
The wind cabinet alarm module 14 is further configured to determine whether the accumulated operation time of the wind cabinet fan is greater than or equal to a preset wind cabinet fan accumulated operation time threshold, and if so, alarm: the running time of the belt of the fan of the single fan cabinet driven by the belt is close to the service life, the replacement is recommended, and the time is accumulated again after the replacement and the reset. For example, if the accumulated running time of the fan of the wind cabinet is more than or equal to 4000 hours, an alarm is given.
In addition, the sub-health warning device 1 further comprises an air quality warning module, the air quality warning module is used for judging whether the value of inhalable particulate matter PM10, the temperature value, the humidity value and the carbon dioxide content preset in the subway exceed corresponding preset values or not, if yes, warning is carried out, and specifically 4-8 PM10 transmitters, temperature and humidity sensors and carbon dioxide sensors can be arranged in subway station halls and stations.
The fault alarm device 2 is used for judging whether a sensor fault, an equipment fault, a valve fault, a communication fault or a system operation parameter fault exists or not, and if so, alarming.
The fault alarm device 2 is specifically used for judging whether the measured value of each sensor of the subway central air-conditioning system exceeds the normal measurement range of a preset sensor, and if so, alarming: and (4) considering that the sensor can be damaged, and alarming for checking. The sensors include temperature sensors, pressure sensors, and flow sensors. For example, if the temperature value measured by the sensor for measuring the temperature of the outlet water of the chilled water is 0, an alarm is given. In addition, the fault alarm device 2 is also provided with an emergency function, if the sensor is damaged, the sensor has the function of participating in automatic control, and a certain preset value is input in an emergency mode, so that the automatic operation is not influenced.
The fault alarm device 2 is specifically configured to determine whether a frequency converter of each device of the subway central air conditioning system has a fault, and alarm if the frequency converter of each device of the subway central air conditioning system has a fault. The prior art is adopted to detect whether the frequency converter has faults. Preferably, in a remote mode (remote manual), the equipment reports a fault and only alarms; in the automatic mode, the equipment reports faults, namely alarms, and also participates in logic actions, such as sending instructions to start standby equipment and the like.
The fault alarm device 2 is specifically configured to alarm if no signal indicating that the valve is in place or closed is received after the preset time period for opening or closing the valve is judged: the valve is not in place due to the fact that dirt is blocked, and needs to be alarmed to remind people to maintain timely. For example, when the main machine chilled water inlet valve is opened or closed, after 120 seconds, if a signal that the valve is opened in place or closed in place is not received, the main machine chilled water inlet valve is indicated to be in fault, and an alarm is given.
The fault alarm device 2 is specifically configured to determine whether a communication fault exists in a frequency converter or an electric meter of each device of the subway central air-conditioning system, and if yes, alarm. The prior art is adopted to detect whether the frequency converter or the ammeter has communication faults. Because the frequency converter, the electric meter and other internal and external devices exchange data instructions in a communication mode, communication needs to be monitored.
The fault alarm device 2 is specifically configured to determine whether the chilled water flow of the host is continuously smaller than a preset chilled water flow threshold value within a preset time period, and if so, perform an alarm.
The fault alarm device 2 is specifically configured to determine whether the cooling water flow of the host is continuously smaller than a preset cooling water flow threshold value within a preset time period, and if so, alarm: indicating that the cooling water flow is too low, is protected by the lowest flow to accommodate the variable flow system. The fault alarm device 2 is also used for judging whether the flow rate of the chilled water of the host is continuously smaller than a preset chilled water flow threshold value within a preset time period, and if so, giving an alarm.
In addition, the fault alarm device 2 is also used for judging whether the cylinder body pressure of the chilled water-containing water cylinder and the cylinder body pressure of the chilled water collecting cylinder are too high or not, so that pressure protection is realized, the end valve is protected to be closed completely, the water system pressure is too high when the differential pressure bypass valve does not act, and the water pump and the host are protected. In addition, the fault alarm device 2 is also used for judging whether the temperature of the chilled water outlet of the main machine and the temperature of the cooling return water of the main machine are abnormal or not so as to ensure normal cooling of the system.
The sensor multipoint consistency early warning device 3 is used for judging whether the temperature errors of the cooling water and the chilled water exceed the standard or not, and if so, giving an alarm.
Sensor multiple spot uniformity early warning device 3 is specifically used for judging whether host computer cooling return water side difference in temperature lasts less than or equal to predetermined host computer cooling return water side difference in temperature threshold value in predetermined time quantum, if then reports to the police: the error of the temperature of the cooling return water of the main machine/the outlet water of the condenser exceeds the standard. The temperature difference of the cooling return water side of the main machine is equal to the cooling return water temperature of the main machine-the outlet water temperature of the condenser of the main machine; for example, the temperature difference of the cooling return water side of the main machine is less than or equal to 0.2 ℃, and the duration is 30 minutes, then the alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the temperature difference of the cooling water outlet side of the main machine is continuously less than or equal to a preset temperature difference threshold value of the cooling water outlet side of the main machine within a preset time period, and if so, giving an alarm: the error of the temperature of the cooling water outlet of the main machine/the inlet water of the condenser exceeds the standard. And the temperature difference between the cooling water outlet side of the main machine and the cooling water outlet temperature of the main machine-the water inlet temperature of the condenser of the main machine. For example, the temperature difference of the cooling water outlet side of the main machine is less than or equal to 0.2 ℃, and the duration is 30 minutes, then the alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the temperature difference of the freezing backwater side of the host is continuously less than or equal to a preset temperature difference threshold value of the freezing backwater side of the host within a preset time period, and if so, giving an alarm: the error of the temperature of the freezing backwater of the main machine/the inlet water of the evaporator exceeds the standard. And the temperature difference of the freezing backwater side of the main machine is equal to the freezing backwater temperature of the main machine-the water inlet temperature of the evaporator of the main machine. For example, the temperature difference of the freezing and water return side of the main machine is less than or equal to 0.2 ℃, and the duration is 30 minutes, then an alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the temperature difference of the freezing water outlet side of the main machine is continuously less than or equal to a preset temperature difference threshold value of the freezing water outlet side of the main machine within a preset time period, and if so, giving an alarm: the error of the temperature of the freezing outlet water of the main machine/the outlet water of the evaporator exceeds the standard. And the temperature difference of the freezing water outlet side of the main machine is equal to the freezing water outlet temperature of the main machine-the water outlet temperature of the evaporator of the main machine. For example, if the temperature difference of the freezing water outlet side of the main machine is less than or equal to 0.2 ℃ and the duration is 30 minutes, an alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the cooling water main pipe return water side temperature difference is continuously less than or equal to a preset cooling water main pipe return water side temperature difference threshold value within a preset time period, and if so, giving an alarm: the temperature error of the return water of the cooling water main pipe/the cooling return water of the main machine exceeds the standard. The temperature difference between the return side of the cooling water main pipe and the return temperature of the cooling water main pipe is equal to the return temperature of the cooling water main pipe and the cooling return temperature of the main machine. For example, the temperature difference of the return side of the cooling water main pipe is less than or equal to 0.2 ℃, and the duration is 30 minutes, then an alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the chilled water main pipe return water side temperature difference is continuously less than or equal to a preset chilled water main pipe return water side temperature difference threshold value within a preset time period, and if so, giving an alarm: the return water temperature error of the main chilled water pipe/the return water temperature of the main chilled water pipe exceeds the standard. The temperature difference of the return side of the chilled water main pipe is equal to the return temperature of the chilled water main pipe-the chilled return temperature of the main machine. For example, the temperature difference of the return water side of the chilled water main pipe is less than or equal to 0.2 ℃, and the duration is 30 minutes, then an alarm is given.
The sensor multipoint consistency early warning device 3 is specifically used for judging whether the chilled water main pipe water outlet side temperature difference is continuously less than or equal to a preset chilled water main pipe water outlet side temperature difference threshold value within a preset time period, and if so, giving an alarm: the temperature error of the outlet water/the water distribution pipe of the chilled water main pipe exceeds the standard. Wherein, the temperature difference of the water outlet side of the main chilled water pipe is equal to the water outlet temperature of the main chilled water pipe-the chilled water outlet temperature of the water distribution pipe. For example, if the temperature difference of the water outlet side of the main chilled water pipe is less than or equal to 0.2 ℃ and the duration is 30 minutes, an alarm is given.
The system comprises a sub-health alarm device 1, a fault alarm device 2 and a sensor multi-point consistency early warning device 3, wherein the sub-health alarm device 1 can judge abnormal operation, the fault alarm device 2 can judge whether a sensor fault, an equipment fault, a valve fault, a communication fault or a system operation parameter fault exists, and the sensor multi-point consistency early warning device 3 can judge whether the temperature errors of cooling water and chilled water exceed the standard or not, so that the system can comprehensively and perfectly give a fault alarm to a subway central air-conditioning system, the daily operation and maintenance level of the subway central air-conditioning system is greatly improved, and the reliability of cooling supply is ensured; and the alarm system can remind operation and maintenance personnel to maintain the equipment, reduce the labor intensity of the operation and maintenance personnel and realize intelligent operation and maintenance and intelligent professional management of the subway central air-conditioning system. In addition, the alarm system can be arranged on a cloud platform, and cloud early warning on a subway central air-conditioning system is realized.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An alarm system for a subway central air-conditioning system, wherein the subway central air-conditioning system comprises a host, a cooling water pump, a chilled water pump, a cooling tower and an air cabinet, and is characterized in that the alarm system comprises a sub-health alarm device, a fault alarm device and a sensor multi-point consistency early warning device, wherein the sub-health alarm device comprises a host alarm module, a water pump alarm module and a cooling tower alarm module;
the host alarm module is used for judging whether the host condenser approximation degree is continuously greater than or equal to a preset condenser approximation degree threshold value within a preset time period, and if so, alarming; the host alarm module is also used for judging whether the approach degree of the host evaporator is continuously greater than or equal to a preset evaporator approach degree threshold value within a preset time period, and if so, alarming;
the water pump alarm module is used for judging whether the input power of the cooling water pump is continuously less than or equal to a preset minimum power value of the cooling water pump within a preset time period, and if so, alarming; the water pump alarm module is also used for judging whether the input power of the cooling water pump is continuously greater than or equal to a preset highest power value of the cooling water pump within a preset time period, and if so, alarming;
the water pump alarm module is also used for judging whether the input power of the chilled water pump is continuously less than or equal to a preset minimum power value of the chilled water pump within a preset time period, and if so, alarming; the water pump alarm module is also used for judging whether the input power of the chilled water pump is continuously greater than or equal to a preset maximum power value of the chilled water pump within a preset time period or not, and if so, alarming;
the cooling tower alarm module is used for judging whether the approximation degree of the cooling tower is continuously greater than or equal to a preset cooling tower approximation degree threshold value within a preset time period, and if so, alarming; the cooling tower alarm module is also used for judging whether the fan input power of the cooling tower is continuously greater than or equal to a preset highest power value of the cooling tower fan within a preset time period, and if so, alarming; the cooling tower alarm module is also used for judging whether the fan input power of the cooling tower is continuously less than or equal to a preset minimum power value of the cooling tower fan within a preset time period, and if so, alarming;
the fault alarm device is used for judging whether a sensor fault, an equipment fault, a valve fault, a communication fault or a system operation parameter fault exists or not, and if so, alarming;
the sensor multi-point consistency early warning device is used for judging whether the temperature errors of the cooling water and the chilled water exceed the standard or not, and if yes, alarming.
2. The alarm system for a central air-conditioning system of a subway according to claim 1, wherein: the cooling tower alarm module is further used for judging whether the fan frequency difference of each running cooling tower is continuously larger than or equal to a preset fan frequency difference threshold value within a preset time period, and if so, alarming.
3. The alarm system for a central air-conditioning system of a subway according to claim 1, wherein: the cooling tower alarm module is also used for judging whether the accumulated running time of the cooling tower is greater than or equal to a preset accumulated running time threshold value of the cooling tower or not, and if so, alarming; the cooling tower alarm module is also used for judging whether the water level of the cooling tower is lower than a preset water level threshold value or not, and if so, alarming.
4. The alarm system for a central air-conditioning system of a subway according to claim 1, wherein: the sub-health alarm device also comprises a wind cabinet alarm module;
the air cabinet alarm module is used for judging whether the input power of the fan of the air cabinet is continuously less than or equal to the preset minimum power value of the fan of the air cabinet within a preset time period, and if so, alarming;
the air cabinet alarm module is also used for judging whether the input power of the fan of the air cabinet is continuously greater than or equal to the preset maximum power value of the fan of the air cabinet within a preset time period, and if so, alarming;
the air cabinet alarm module is also used for judging whether the temperature difference between the inlet air and the return air is continuously less than or equal to a preset inlet air and return air temperature difference threshold value within a preset time period, and giving an alarm if the temperature difference between the inlet air and the return air is less than or equal to the preset inlet air and return air temperature difference threshold value;
the air cabinet alarm module is also used for judging whether the accumulated operation time of the fan of the air cabinet is greater than or equal to a preset threshold value of the accumulated operation time of the fan of the air cabinet, and if so, alarming.
5. The alarm system for a central air-conditioning system of a subway according to claim 1, wherein:
the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the cooling return water side of the main machine is continuously smaller than or equal to a preset temperature difference threshold value of the cooling return water side of the main machine in a preset time period, and if so, giving an alarm;
the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the cooling water outlet side of the main machine is continuously smaller than or equal to a preset temperature difference threshold value of the cooling water outlet side of the main machine in a preset time period, and if so, giving an alarm;
the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the freezing backwater side of the host is continuously smaller than or equal to a preset temperature difference threshold value of the freezing backwater side of the host in a preset time period or not, and if so, giving an alarm;
the sensor multi-point consistency early warning device is specifically used for judging whether the temperature difference of the freezing water outlet side of the main machine is continuously smaller than or equal to a preset temperature difference threshold value of the freezing water outlet side of the main machine in a preset time period, and if so, giving an alarm.
6. The warning system for a central air-conditioning system of a subway according to claim 5, wherein:
the sensor multi-point consistency early warning device is specifically used for judging whether the temperature difference of the return water side of the cooling water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the return water side of the cooling water main pipe in a preset time period, and if so, giving an alarm;
the sensor multipoint consistency early warning device is specifically used for judging whether the temperature difference of the return water side of the chilled water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the return water side of the chilled water main pipe in a preset time period, and if so, giving an alarm;
the sensor multi-point consistency early warning device is specifically used for judging whether the temperature difference of the water outlet side of the chilled water main pipe is continuously smaller than or equal to a preset temperature difference threshold value of the water outlet side of the chilled water main pipe in a preset time period, and if yes, giving an alarm.
7. The alarm system for a central air-conditioning system of a subway according to claim 1, wherein: the fault alarm device is specifically used for judging whether the measured value of each sensor of the subway central air-conditioning system exceeds the normal measurement range of a preset sensor or not, and if so, alarming.
8. The warning system for a central air-conditioning system of a subway according to claim 7, wherein: the fault alarm device is specifically used for judging whether a frequency converter of each device of the subway central air-conditioning system has a fault or not, and if yes, alarming.
9. The warning system for a central air-conditioning system of a subway according to claim 8, wherein: the fault alarm device is specifically used for alarming if the signal that the valve is opened in place or closed in place is not received after the preset time period that the valve is opened or closed is judged.
10. The warning system for a central air-conditioning system of a subway according to claim 9, wherein:
the fault alarm device is specifically used for judging whether a frequency converter or an ammeter of each device of the subway central air-conditioning system has a communication fault or not, and if so, giving an alarm;
the fault alarm device is specifically used for judging whether the chilled water flow of the host is continuously smaller than a preset chilled water flow threshold value within a preset time period, and if so, giving an alarm;
the fault alarm device is specifically used for judging whether the cooling water flow of the host is continuously smaller than a preset cooling water flow threshold value within a preset time period, and if so, alarming.
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Application publication date: 20210914 |