CN114234289A - Multi-working-condition tail end air conditioning system, control method and control device - Google Patents
Multi-working-condition tail end air conditioning system, control method and control device Download PDFInfo
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- CN114234289A CN114234289A CN202111552156.7A CN202111552156A CN114234289A CN 114234289 A CN114234289 A CN 114234289A CN 202111552156 A CN202111552156 A CN 202111552156A CN 114234289 A CN114234289 A CN 114234289A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003993 interaction Effects 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000013500 data storage Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000001932 seasonal effect Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000001954 sterilising effect Effects 0.000 description 8
- 238000004659 sterilization and disinfection Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
- F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air
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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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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Abstract
The invention discloses a tail-end air conditioning system for multiple working conditions, a control method and a control device, which relate to the technical field of automatic control and comprise a combined air conditioning unit body, an exhaust shaft, an air inlet shaft, a fresh air duct, a winter air duct and an air return duct, wherein the system air duct of the combined air conditioning unit body is provided with the fresh air duct and the winter air duct, the winter air duct is connected with the fresh air duct, the fresh air duct is connected with the air inlet shaft, and the air return duct is connected with the exhaust shaft; the system air duct of the combined air conditioning unit body is additionally provided with the new air duct, so that a surface cooler is not required to be arranged in the tail end air conditioning system, the resistance of the surface cooler is avoided in transitional seasons, the power consumption of a fan for doing useless work is reduced, and the comprehensive energy efficiency of the tail end air conditioning system can be improved; the winter air duct is additionally arranged on the system air duct of the combined air conditioning unit body, so that the use requirement of small air volume in winter can be met, the comfort of a human body is improved, and the energy consumption of a tail end air conditioning system is reduced.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to a multi-working-condition tail end air conditioning system, a control method and a control device.
Background
The group control system is composed of a management layer (group control system software), a control layer (intelligent control cabinet group), and an equipment layer (unit, water pump, cooling tower, tail end fan, electric butterfly valve, various sensors, etc.) three-level network. The heating ventilation air-conditioning control system is a brain in the heating ventilation air-conditioning and controls various devices (a cooling tower, a water pump, a cold source unit, a fan and the like) in the heating ventilation specialty to operate;
the conventional air duct system of the heating ventilation air conditioner in the market at present is designed into an air supply duct and a return air duct, the air duct design is designed according to a hot working condition in summer, and the working condition that the tail end air conditioner does not need refrigeration but needs air supply in transition seasons and winter is not considered, so that the air duct resistance in the transition seasons and winter is large, the air volume in an input room is large, and the conditions of high energy consumption and discomfort occur; therefore, the invention aims to provide a multi-working-condition tail end air conditioning system, a control method and a control device so as to overcome the defects in the prior art.
Disclosure of Invention
In order to overcome the above-mentioned disadvantages of the prior art, it is an object of the present invention to provide: the tail end air conditioning system for the multiple working conditions comprises a combined air conditioning unit body, an exhaust shaft, an air inlet shaft, a fresh air duct, a winter air duct and an air return duct, wherein the fresh air duct and the winter air duct are arranged on the system air duct of the combined air conditioning unit body, the winter air duct is connected with the fresh air duct, the fresh air duct is connected with the air inlet shaft, and the air return duct is connected with the exhaust shaft.
The further improvement lies in that: and a fresh air fan and a fresh air supply valve are arranged on the fresh air duct, and a winter air supply valve and a winter fan are arranged on the winter air duct.
The further improvement lies in that: the combined air conditioning unit body is connected with a first air mixing chamber and a second air mixing chamber, the first air mixing chamber is respectively connected with an air inlet shaft and an air return duct, and the air return duct is provided with an air return fan, an air return valve and an air exhaust valve.
The further improvement lies in that: the combined air conditioning unit body is connected with a refrigeration air duct, an air supply valve of the combined air conditioning unit is arranged on the refrigeration air duct, and the refrigeration air duct, the fresh air duct and the winter air duct are all connected with the second air mixing chamber.
The further improvement lies in that: and a pipeline of the first air mixing chamber connected with the air inlet shaft is provided with a fresh air valve, and a pipeline of the first air mixing chamber connected with the air return duct is provided with an air return valve.
A control method of a multi-working-condition tail end air conditioning system is applied to an air conditioning unit and comprises the following steps:
acquiring a running environment parameter value;
judging the mode of the air side system according to the operating environment parameter value, and controlling the tail end air conditioning system to execute a corresponding air side mode under a corresponding working condition according to a judgment result;
judging whether a wind side mode in the tail end air conditioning system is in a mode available state or not, and controlling the wind side mode to be opened or closed according to a judgment result;
and when the wind responding side mode belongs to the openable state, controlling each subordinate mode contained in the wind responding side mode to operate according to the control flow of the corresponding mode.
The further improvement lies in that: the operating environment parameter values are outdoor air enthalpy value, indoor average enthalpy value, outdoor temperature, air supply temperature set value, outdoor minimum temperature set value and indoor dew point temperature parameter.
The further improvement lies in that: the wind side mode comprises a small fresh air mode, a full ventilation mode and a winter and seasonal wind mode.
The further improvement lies in that: when the enthalpy value Hw of outdoor air is larger than or equal to the indoor average enthalpy value Ha, executing a small fresh air mode, and synchronously carrying out time delay zero clearing operation when the state of a wind module is 'opening';
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha and the outdoor temperature Tw is larger than or equal To the air supply temperature set value To, executing a fresh air mode, and synchronously carrying out time delay zero clearing operation when the air module is in an opening state;
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha, and the outdoor minimum temperature set value Tl is smaller than the outdoor temperature Tw and smaller than the air supply temperature set value To, executing a full ventilation mode, and synchronously performing time delay zero clearing operation when the state of the air module is 'opening';
when the enthalpy value Hw of outdoor air is smaller than the indoor average enthalpy value Ha, and the indoor dew point temperature TL is smaller than the outdoor temperature Tw and smaller than the outdoor minimum temperature set value Tl, the winter-season wind mode is executed, the wind module is in the 'on' state, and the delay zero clearing operation is synchronously carried out.
The utility model provides a terminal air conditioning system controlling means for multiplex condition which characterized in that: the system comprises a human-computer interaction interface, a data storage database and a control execution system;
the human-computer interaction interface is used for providing operation and maintenance operation functions, starting and stopping operation of the tail end air conditioning system and monitoring the tail end air conditioning system;
the data storage database is used for storing data and accessing internal historical data through a human-computer interaction interface;
the control execution system is used for receiving a control command issued by a user in the man-machine interaction interface and executing corresponding logic output according to a preset execution flow to realize control over the wind side mode.
The invention has the beneficial effects that: according to the combined air conditioning unit, the system air duct of the combined air conditioning unit body is additionally provided with the new air duct, so that a surface cooler is not required to be arranged in the tail end air conditioning system, the tail end air conditioning system does not have resistance of the surface cooler in transitional seasons, the power consumption of a fan for doing useless work is reduced, and the comprehensive energy efficiency of the tail end air conditioning system can be improved;
the winter air duct is additionally arranged on the system air duct of the combined air conditioning unit body and is designed according to the small air volume, so that the use requirement of the small air volume in winter can be met, the comfort of a human body is improved, and the energy consumption of a tail end air conditioning system is reduced;
the mode of the air side system is judged according to the enthalpy value of outdoor air, the indoor average enthalpy value, the outdoor temperature, the air supply temperature set value, the outdoor minimum temperature set value and the indoor dew point temperature parameter, so that the opening of each air side mode in the terminal air conditioning system is more scientific, the terminal air conditioning system can adapt to different working conditions, the application range is greatly expanded, the automatic adjusting mode can reduce the consumption of human resources, and the air side system has the advantages of high efficiency and quickness.
Drawings
FIG. 1 is a schematic structural diagram of a multi-operating-mode end air conditioning system according to the present invention;
FIG. 2 is a schematic view of a wind side system mode determination process according to the present invention;
FIG. 3 is a schematic view of a wind side mode control flow of the present invention;
FIG. 4 is a schematic structural diagram of a control device of a multi-operating-mode end air conditioning system according to the present invention.
Wherein: 1. a combined air conditioning unit body; 2. an air discharge well; 3. an air inlet well; 4. a first air mixing chamber; 5. a second air mixing chamber; 6. a fresh air duct; 7. a winter air duct; 8. a return air exhaust duct; 9. a refrigeration air duct; 10. the air supply valve of the combined air conditioning unit; 11. a brand new fan; 12. a fresh air supply valve; 13. a winter air supply valve; 14. a fan in winter; 15. a return exhaust fan; 16. a return air exhaust valve; 17. an exhaust valve; 18. a fresh air valve; 19. and a return air valve.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
According to the figure 1, the embodiment provides a multi-working-condition terminal air conditioning system, which comprises a combined air conditioning unit body 1, an exhaust well 2, an air inlet well 3, a fresh air duct 6, a winter air duct 7 and an air return duct 8, wherein the fresh air duct 6 and the winter air duct 7 are arranged on the system air duct of the combined air conditioning unit body 1, the winter air duct 7 is connected with the fresh air duct 6, the fresh air duct 6 is connected with the air inlet well 3, and the air return duct 8 is connected with the exhaust well 2.
The fresh air duct 6 is provided with a fresh air blower 11 and a fresh air supply valve 12, and the winter air duct 7 is provided with a winter air supply valve 13 and a winter air blower 14.
The combined air conditioning unit body 1 is connected with a first air mixing chamber 4 and a second air mixing chamber 5, the first air mixing chamber 4 is respectively connected with an air inlet shaft 3 and an air return duct 8, and the air return duct 8 is provided with an air return fan 15, an air return valve 16 and an air exhaust valve 17.
The combined air conditioning unit comprises a combined air conditioning unit body 1, a refrigerating air duct 9, a combined air conditioning unit air supply valve 10, a refrigerating air duct 9, a fresh air duct 6 and a winter air duct 7, wherein the combined air conditioning unit body 1 is connected with the refrigerating air duct 9, and the refrigerating air duct 9, the fresh air duct 6 and the winter air duct 7 are connected with a second air mixing chamber 5.
A pipeline of the first air mixing chamber 4 connected with the air inlet shaft 3 is provided with a fresh air valve 18, and a pipeline of the first air mixing chamber 4 connected with the air return duct 8 is provided with an air return valve 19.
According to the combined air conditioning unit, the system air duct of the combined air conditioning unit body 1 is additionally provided with the new air duct 6, so that a surface cooler is not required to be arranged in the tail end air conditioning system, the tail end air conditioning system does not have resistance of the surface cooler in a transition season, the power consumption of a fan for doing useless work is reduced, and the comprehensive energy efficiency of the tail end air conditioning system can be improved;
the winter air duct 7 is additionally arranged on the system air duct of the combined air conditioning unit body 1, the winter air duct 7 is designed according to the small air volume, the use requirement of the small air volume in winter can be adapted, the comfort of a human body is improved, and the energy consumption of a terminal air conditioning system is reduced.
Example two
As shown in fig. 2, the present embodiment provides a method for controlling a multi-operating-mode terminal air conditioning system, including the following steps:
acquiring an outdoor air enthalpy value, an indoor average enthalpy value, an outdoor temperature, an air supply temperature set value, an outdoor minimum temperature set value and an indoor dew point temperature parameter, judging a wind side system mode according to the parameters, and controlling a terminal air conditioning system to execute a corresponding wind side mode under a corresponding working condition according to a judgment result;
the method specifically comprises the following steps:
when the enthalpy value Hw of outdoor air is larger than or equal to the indoor average enthalpy value Ha, executing a small fresh air mode, and synchronously carrying out time delay zero clearing operation when the state of a wind module is 'opening';
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha and the outdoor temperature Tw is larger than or equal To the air supply temperature set value To, executing a fresh air mode, and synchronously carrying out time delay zero clearing operation when the air module is in an opening state;
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha, and the outdoor minimum temperature set value Tl is smaller than the outdoor temperature Tw and smaller than the air supply temperature set value To, executing a full ventilation mode, and synchronously performing time delay zero clearing operation when the state of the air module is 'opening';
when the enthalpy value Hw of outdoor air is less than the indoor average enthalpy value Ha, and the indoor dew point temperature TL is less than the outdoor temperature Tw and less than the outdoor minimum temperature set value Tl, executing a winter-season wind mode, wherein the wind module is in an opening state, and synchronously performing time delay zero clearing operation;
judging whether a wind side mode in the tail end air conditioning system is in a mode available state or not, and controlling the wind side mode to be opened or closed according to a judgment result;
the method specifically comprises the following steps:
available conditions of the small fresh air mode are as follows: the blower of the combined air conditioning unit body 1 has no fault, the return air exhaust fan 15 has no fault, and the return air valve 19 has no fault;
available conditions of a full-fresh mode: the blower of the combined air conditioning unit body 1 has no fault, the return air exhaust fan 15 has no fault, the fresh air valve 18 has no fault, and the exhaust air valve 17 has no fault;
conditions available for full ventilation mode: the brand new fan 11 has no fault, the return exhaust fan 15 has no fault, and the exhaust valve 17 has no fault;
available conditions for the winter season mode: the fan 14 is failure free in winter.
The mode of the air side system is judged according to the enthalpy value of outdoor air, the indoor average enthalpy value, the outdoor temperature, the air supply temperature set value, the outdoor minimum temperature set value and the indoor dew point temperature parameter, so that the opening of each air side mode in the terminal air conditioning system is more scientific, the terminal air conditioning system can adapt to different working conditions, and the application range is greatly expanded.
EXAMPLE III
As shown in fig. 3, this embodiment provides a control method for a multi-operating-condition terminal air conditioning system, where when a wind-side mode is in an openable state, the method controls each subordinate mode included in the wind-side mode according to a control flow of the corresponding mode to perform operation, specifically:
when the small fresh air mode belongs to an openable state, the control flow is as follows:
opening the return air valve 19, and judging whether the return air valve 19 is opened to the maximum range;
when the return air valve 19 is opened to the maximum range, controlling the blower and the return air exhauster 15 of the combined air conditioning unit body 1 to carry out opening commands;
when the air feeder and the air return exhauster of the combined air conditioning unit body 1 feed back the running state, issuing a starting command of the air-conditioning electrostatic sterilization device;
and when the group air static sterilization device is started and operated, other equipment is closed, and the control flow is ended.
When the fresh air mode belongs to an openable state, the control flow is as follows:
issuing an opening command of the exhaust valve 17 and the fresh air valve 18, and judging whether the exhaust valve 17 and the fresh air valve 18 are opened to 100%;
when the feedback of the exhaust valve 17 and the fresh air valve 18 is 100%, the opening commands of the blower and the return exhaust fan 15 of the combined air conditioning unit body 1 are issued;
when the air feeder and the air return exhauster of the combined air conditioning unit body 1 feed back the running state, issuing a starting command of the air-conditioning electrostatic sterilization device;
and when the group air static sterilization device is started and operated, other equipment is closed, and the control flow is ended.
When the full ventilation mode belongs to an openable state, the control flow is as follows:
issuing an opening command of the exhaust valve 17 and the fresh air supply valve 12, and judging whether the exhaust valve 17 and the fresh air supply valve 12 are opened to 100%;
when the exhaust valve 17 and the fresh air supply valve 12 are opened to 100%, issuing opening commands of the fresh air fan 11 and the return air fan 15;
when the brand new fan 11 and the return exhaust fan feed back the running state, issuing a group air static sterilization device starting command;
and when the group air static sterilization device is started and operated, other equipment is closed, and the control flow is ended.
When the winter season mode belongs to the openable state, the control flow is as follows:
issuing a winter fan 14 starting command;
when the fan 14 feeds back the running state in winter, issuing a starting command of the air-cooling electrostatic sterilization device;
and when the group air static sterilization device is started and operated, other equipment is closed, and the control flow is ended.
In this embodiment, the automatic adjustment mode can reduce human resource consumption, has high-efficient swift advantage.
Example four
As shown in fig. 4, the present embodiment provides a multi-operating mode terminal air conditioning system control device, which includes a human-computer interaction interface, a data storage database, and a control execution system;
the human-computer interaction interface is used for providing operation and maintenance operation functions, and providing operation and maintenance personnel for starting and stopping the operation of the tail end air conditioning system and supervising the tail end air conditioning system;
the data storage database is used for storing data and allowing operation and maintenance personnel to access internal historical data through a man-machine interaction interface;
the control execution system is used for receiving a control command issued by a user in the man-machine interaction interface and executing corresponding logic output according to a preset execution flow to realize control over the wind side mode.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a terminal air conditioning system is used to multiplex condition which characterized in that: the combined air conditioning unit comprises a combined air conditioning unit body, an exhaust shaft, an air inlet shaft, a fresh air duct, a winter air duct and an air return duct, wherein the fresh air duct and the winter air duct are arranged on a system air duct of the combined air conditioning unit body, the winter air duct is connected with the fresh air duct, the fresh air duct is connected with the air inlet shaft, and the air return duct is connected with the exhaust shaft.
2. The multi-operating-mode terminal air conditioning system according to claim 1, wherein: and a fresh air fan and a fresh air supply valve are arranged on the fresh air duct, and a winter air supply valve and a winter fan are arranged on the winter air duct.
3. The multi-operating-mode terminal air conditioning system according to claim 1, wherein: the combined air conditioning unit body is connected with a first air mixing chamber and a second air mixing chamber, the first air mixing chamber is respectively connected with an air inlet shaft and an air return duct, and the air return duct is provided with an air return fan, an air return valve and an air exhaust valve.
4. The multi-operating-mode terminal air conditioning system according to claim 3, wherein: the combined air conditioning unit body is connected with a refrigeration air duct, an air supply valve of the combined air conditioning unit is arranged on the refrigeration air duct, and the refrigeration air duct, the fresh air duct and the winter air duct are all connected with the second air mixing chamber.
5. The multi-operating-mode terminal air conditioning system according to claim 3, wherein: and a pipeline of the first air mixing chamber connected with the air inlet shaft is provided with a fresh air valve, and a pipeline of the first air mixing chamber connected with the air return duct is provided with an air return valve.
6. A control method of a tail end air conditioning system for multiple working conditions is applied to an air conditioning unit and is characterized in that: the method comprises the following steps:
acquiring a running environment parameter value;
judging the mode of the air side system according to the operating environment parameter value, and controlling the tail end air conditioning system to execute a corresponding air side mode under a corresponding working condition according to a judgment result;
judging whether a wind side mode in the tail end air conditioning system is in a mode available state or not, and controlling the wind side mode to be opened or closed according to a judgment result;
and when the wind responding side mode belongs to the openable state, controlling each subordinate mode contained in the wind responding side mode to operate according to the control flow of the corresponding mode.
7. The control method of the multi-condition terminal air conditioning system according to claim 6, wherein: the operating environment parameter values are outdoor air enthalpy value, indoor average enthalpy value, outdoor temperature, air supply temperature set value, outdoor minimum temperature set value and indoor dew point temperature parameter.
8. The control method of the multi-condition terminal air conditioning system according to claim 6, wherein: the wind side mode comprises a small fresh air mode, a full ventilation mode and a winter and seasonal wind mode.
9. The control method of the multi-condition terminal air conditioning system according to claim 7, wherein: when the enthalpy value Hw of outdoor air is larger than or equal to the indoor average enthalpy value Ha, executing a small fresh air mode, and synchronously carrying out time delay zero clearing operation when the state of a wind module is 'opening';
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha and the outdoor temperature Tw is larger than or equal To the air supply temperature set value To, executing a fresh air mode, and synchronously carrying out time delay zero clearing operation when the air module is in an opening state;
when the outdoor air enthalpy value Hw is smaller than the indoor average enthalpy value Ha, and the outdoor minimum temperature set value Tl is smaller than the outdoor temperature Tw and smaller than the air supply temperature set value To, executing a full ventilation mode, and synchronously performing time delay zero clearing operation when the state of the air module is 'opening';
when the enthalpy value Hw of outdoor air is smaller than the indoor average enthalpy value Ha, and the indoor dew point temperature TL is smaller than the outdoor temperature Tw and smaller than the outdoor minimum temperature set value Tl, the winter-season wind mode is executed, the wind module is in the 'on' state, and the delay zero clearing operation is synchronously carried out.
10. The utility model provides a terminal air conditioning system controlling means for multiplex condition which characterized in that: the system comprises a human-computer interaction interface, a data storage database and a control execution system;
the human-computer interaction interface is used for providing operation and maintenance operation functions, starting and stopping operation of the tail end air conditioning system and monitoring the tail end air conditioning system;
the data storage database is used for storing data and accessing internal historical data through a human-computer interaction interface;
the control execution system is used for receiving a control command issued by a user in the man-machine interaction interface and executing corresponding logic output according to a preset execution flow to realize control over the wind side mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115200131A (en) * | 2022-07-25 | 2022-10-18 | 贵州汇通华城股份有限公司 | Control method and device for ventilation air-conditioning air system of subway station |
| CN115388480A (en) * | 2022-09-05 | 2022-11-25 | 珠海格力电器股份有限公司 | Air conditioning unit and control method thereof |
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