CN111238007A - Central air conditioner control method - Google Patents
Central air conditioner control method Download PDFInfo
- Publication number
- CN111238007A CN111238007A CN201811446991.0A CN201811446991A CN111238007A CN 111238007 A CN111238007 A CN 111238007A CN 201811446991 A CN201811446991 A CN 201811446991A CN 111238007 A CN111238007 A CN 111238007A
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- China
- Prior art keywords
- frequency compressor
- central air
- equipment
- starting
- fixed
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
Abstract
The invention discloses a control method.A controller sequentially starts or closes related equipment according to the start-stop sequence and the running time of each equipment in a central air-conditioning system so as to output start or close control signals, thereby solving the problems of the complexity of the start-stop operation of each current equipment, the different aging degrees of the equipment caused by manual start-stop operation equipment, the shutdown of the whole system caused by the fault of certain equipment of the system and the like, reducing the working load of operators, improving the stability of the system running, the convenience of equipment maintenance and reducing the energy consumption of the system.
Description
Technical Field
The invention relates to the technical field of central air conditioner control, in particular to a central air conditioner control method.
Background
Currently, a building central air conditioning system is generally managed and operated by a building manager, and the start-stop control method of the building central air conditioning system is as follows:
when starting each equipment in the central air-conditioning system, the starting time is determined according to outdoor temperature and humidity and working time, and under the general condition, the controller is started in sequence according to the sequence of starting a refrigerator electric butterfly valve, starting a cooling tower, starting a cooling water pump, starting a cold water pump and starting a refrigerator; when each device in the central air-conditioning system is closed, the closing time is determined according to the outdoor temperature and humidity and the off-duty time, and generally, the controller is sequentially closed according to the sequence of the stop of the refrigerator, the time delay, the stop of the cooling water pump, the stop of the cooling tower, the stop of the freezing water pump and the closing of the electric butterfly valve of the refrigerator.
The above are the operation steps of the property manager starting and stopping each device, and as can be seen from the above starting and stopping control method, the operator must strictly execute the operation according to the starting and stopping sequence of each device, the operation steps are complex and complicated, and operation errors are easy to occur to cause the shutdown of the central air conditioning system, even damage some devices; after field investigation, it is found that the equipment can be started and stopped by an operator at will, so that the aging degree of part of equipment is particularly serious due to long-term operation, and in this way, the equipment is not beneficial to unified maintenance and replacement.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a novel central air conditioner control method, which improves the allowable stability.
In order to achieve the above object, the present invention provides a central air-conditioning control method, wherein each of the devices of the central air-conditioning system includes a plurality of chiller devices, a plurality of refrigerant pump devices, a plurality of cooling pump devices, and a plurality of cooling tower devices; comprises that
The variable-frequency compressor and the fixed-frequency compressor are arranged in the central air conditioner in parallel;
receiving a starting or shutdown instruction of a user, and acquiring operation signals of each device of the central air-conditioning system in real time by a controller;
in the initial stage of starting, when the energy demand of the air conditioner is less than the output energy of the fixed-frequency compressor, only the variable-frequency compressor is started;
when the output power needs to be increased and the energy demand of the air conditioner is greater than the output energy of the variable frequency compressor, the variable frequency compressor is operated to the highest frequency, and then the fixed frequency compressor is started; and
according to the operation signal, the controller automatically accumulates the operation time of each device of the central air-conditioning system so as to respectively compare the device with the shortest operation time and the device with the longest operation time in the same device of each device of the central air-conditioning system;
according to the start-stop sequence and the running time of each device of the central air-conditioning system, the controller sequentially starts the device with the shortest running time in the same device or closes the device with the longest running time in the same device so as to output a start or close control signal;
after receiving a starting instruction of a user or after starting of each device of the central air-conditioning system is finished, automatically locking the device according to a fault signal of the device in the central air-conditioning system acquired by the controller in real time so as to prohibit the device from being started again, and starting the device which is not started and has the shortest running time in the same device.
The control method further comprises the following steps:
and after the fixed-frequency compressor is started, when the energy requirement of the air conditioner is less than the output energy of the fixed-frequency compressor, closing the fixed-frequency compressor.
In the control method, after the inverter compressor is operated to the highest frequency, the step of starting the fixed-frequency compressor specifically comprises the following steps:
delaying a period of time after the variable frequency compressor operates to the highest frequency, and then starting the fixed frequency compressor;
and when the energy requirement of the air conditioner is greater than the output energy of the variable frequency compressor, the fixed frequency compressor is started in the step of starting the fixed frequency compressor after the variable frequency compressor runs to the highest frequency, and the frequency of the variable frequency compressor is reduced at the same time.
In the control method, the equipment with the shortest running time is searched in the same equipment which does not run, whether the equipment is in a fault-free state or not is judged, and if yes, the equipment is started preferentially;
and searching the equipment with the longest running time in the same running equipment, and preferentially closing the equipment.
The invention has the following beneficial effects;
in the control method, the controller sequentially starts or closes the related equipment according to the start-stop sequence and the running time of each equipment in the central air-conditioning system so as to output the start-stop or close control signals, thereby solving the problems of the complexity of the start-stop operation of each equipment, the different aging degrees of the equipment caused by the manual start-stop operation of the equipment, the shutdown of the whole system caused by the fault of one equipment of the system and the like, reducing the working load of operators, improving the stability of the system running, the convenience of equipment maintenance and reducing the energy consumption of the system.
Detailed Description
The technical solution of the present invention is explained in detail below for easy understanding.
A central air-conditioning control method, wherein, each device of the central air-conditioning system comprises a plurality of refrigerating machine devices, a plurality of refrigerating pump devices, a plurality of cooling pump devices and a plurality of cooling tower devices; comprises that
The variable-frequency compressor and the fixed-frequency compressor are arranged in the central air conditioner in parallel;
receiving a starting or shutdown instruction of a user, and acquiring operation signals of each device of the central air-conditioning system in real time by a controller;
in the initial stage of starting, when the energy demand of the air conditioner is less than the output energy of the fixed-frequency compressor, only the variable-frequency compressor is started;
when the output power needs to be increased and the energy demand of the air conditioner is greater than the output energy of the variable frequency compressor, the variable frequency compressor is operated to the highest frequency, and then the fixed frequency compressor is started; and
according to the operation signal, the controller automatically accumulates the operation time of each device of the central air-conditioning system so as to respectively compare the device with the shortest operation time and the device with the longest operation time in the same device of each device of the central air-conditioning system;
according to the start-stop sequence and the running time of each device of the central air-conditioning system, the controller sequentially starts the device with the shortest running time in the same device or closes the device with the longest running time in the same device so as to output a start or close control signal;
after receiving a starting instruction of a user or after starting of each device of the central air-conditioning system is finished, automatically locking the device according to a fault signal of the device in the central air-conditioning system acquired by the controller in real time so as to prohibit the device from being started again, and starting the device which is not started and has the shortest running time in the same device.
The control method further comprises the following steps:
and after the fixed-frequency compressor is started, when the energy requirement of the air conditioner is less than the output energy of the fixed-frequency compressor, closing the fixed-frequency compressor.
In the control method, after the inverter compressor is operated to the highest frequency, the step of starting the fixed-frequency compressor specifically comprises the following steps:
delaying a period of time after the variable frequency compressor operates to the highest frequency, and then starting the fixed frequency compressor;
and when the energy requirement of the air conditioner is greater than the output energy of the variable frequency compressor, the fixed frequency compressor is started in the step of starting the fixed frequency compressor after the variable frequency compressor runs to the highest frequency, and the frequency of the variable frequency compressor is reduced at the same time.
In the control method, the equipment with the shortest running time is searched in the same equipment which does not run, whether the equipment is in a fault-free state or not is judged, and if yes, the equipment is started preferentially;
and searching the equipment with the longest running time in the same running equipment, and preferentially closing the equipment.
In the control method, the controller sequentially starts or closes the related equipment according to the start-stop sequence and the running time of each equipment in the central air-conditioning system so as to output the start-stop or close control signals, thereby solving the problems of the complexity of the start-stop operation of each equipment, the different aging degrees of the equipment caused by the manual start-stop operation of the equipment, the shutdown of the whole system caused by the fault of one equipment of the system and the like, reducing the working load of operators, improving the stability of the system running, the convenience of equipment maintenance and reducing the energy consumption of the system.
The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Claims (4)
1. A central air-conditioning control method, wherein, each device of the central air-conditioning system comprises a controller, a plurality of refrigerating machine devices, a plurality of refrigerating pump devices, a plurality of cooling pump devices and a plurality of cooling tower devices; which is characterized by comprising
The variable-frequency compressor and the fixed-frequency compressor are arranged in the central air conditioner in parallel;
the controller receives a starting or shutdown instruction of a user, and collects operation signals of all equipment of the central air-conditioning system in real time;
in the initial stage of starting, when the energy demand of the air conditioner is less than the output energy of the fixed-frequency compressor, only the variable-frequency compressor is started;
when the output power needs to be increased and the energy demand of the air conditioner is greater than the output energy of the variable frequency compressor, the variable frequency compressor is operated to the highest frequency, and then the fixed frequency compressor is started; and
according to the operation signal, the controller automatically accumulates the operation time of each device of the central air-conditioning system so as to respectively compare the device with the shortest operation time and the device with the longest operation time in the same device of each device of the central air-conditioning system;
according to the start-stop sequence and the running time of each device of the central air-conditioning system, the controller sequentially starts the device with the shortest running time in the same device or closes the device with the longest running time in the same device so as to output a start or close control signal;
after receiving a starting instruction of a user or after starting of each device of the central air-conditioning system is finished, automatically locking the device according to a fault signal of the device in the central air-conditioning system acquired by the controller in real time so as to prohibit the device from being started again, and starting the device which is not started and has the shortest running time in the same device.
2. The control method according to claim 1, characterized by further comprising:
and after the fixed-frequency compressor is started, when the energy requirement of the air conditioner is less than the output energy of the fixed-frequency compressor, closing the fixed-frequency compressor.
3. The control method according to claim 2, wherein the step of starting the fixed-frequency compressor after the inverter compressor is operated to the highest frequency comprises the following specific steps:
delaying a period of time after the variable frequency compressor operates to the highest frequency, and then starting the fixed frequency compressor;
and when the energy requirement of the air conditioner is greater than the output energy of the variable frequency compressor, the fixed frequency compressor is started in the step of starting the fixed frequency compressor after the variable frequency compressor runs to the highest frequency, and the frequency of the variable frequency compressor is reduced at the same time.
4. The control method according to claim 1, wherein the device with the shortest running time is searched for in the same device which is not running, and whether the device is in a no-fault state is judged, if yes, the device is started preferentially;
and searching the equipment with the longest running time in the same running equipment, and preferentially closing the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446991.0A CN111238007A (en) | 2018-11-29 | 2018-11-29 | Central air conditioner control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446991.0A CN111238007A (en) | 2018-11-29 | 2018-11-29 | Central air conditioner control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111238007A true CN111238007A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811446991.0A Pending CN111238007A (en) | 2018-11-29 | 2018-11-29 | Central air conditioner control method |
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| CN (1) | CN111238007A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682882A (en) * | 2020-12-28 | 2021-04-20 | 无锡市工业设备安装有限公司 | Implementation method of green efficient energy-saving refrigeration machine room integrated module |
-
2018
- 2018-11-29 CN CN201811446991.0A patent/CN111238007A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682882A (en) * | 2020-12-28 | 2021-04-20 | 无锡市工业设备安装有限公司 | Implementation method of green efficient energy-saving refrigeration machine room integrated module |
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Application publication date: 20200605 |