CN213811035U - Automatic control system of air purification ventilation air conditioner - Google Patents
Automatic control system of air purification ventilation air conditioner Download PDFInfo
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- CN213811035U CN213811035U CN202022574340.9U CN202022574340U CN213811035U CN 213811035 U CN213811035 U CN 213811035U CN 202022574340 U CN202022574340 U CN 202022574340U CN 213811035 U CN213811035 U CN 213811035U
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Abstract
The utility model provides an automatic control system of an air purification ventilation air conditioner, which is used for a workshop and comprises a combined purification air conditioner control system, a workshop temperature and humidity/pressure difference monitoring system and a refrigeration station water system; the combined type purifying air-conditioning system comprises an air inlet pipeline, an air return pipeline, a shutdown anti-freezing protection device, a fresh air valve, a primary-effect filter screen, a preheating device, a blower, a cold water device, a steam device, a middle-effect filter screen, an ozone generating device and an air return valve; the workshop temperature and humidity/pressure difference control system comprises a return air temperature sensor, a return air humidity sensor, an indoor temperature sensor, an indoor humidity sensor, an indoor pressure sensor, an air supply speed sensor and a man-machine interaction device; the utility model discloses air purification ventilation air conditioner automatic control system includes that combination formula purifies air conditioner control system, workshop humiture/pressure differential monitored control system, refrigeration station water system and PLC controller, through accurate control, can ensure automatically that temperature, humidity, pressure etc. in every workshop are suitable.
Description
Technical Field
The utility model relates to a control system technical field, concretely relates to air purification ventilation air conditioner automatic control system.
Background
In workplaces such as hospitals and factories, air quality is strictly required, the circulation of internal air needs to be maintained, and polluted air in the workplace is discharged through an air exhaust system.
The workshop in the factory is the basic unit of enterprise internal organization production, also is the first-level organization of enterprise production administrative management, is formed by a plurality of workshop sections or production teams, it sets up according to the professional nature of each stage of enterprise internal product production or each component of product and the professional nature of each auxiliary production activity, possess factory building or place, machine equipment, instrument and certain producer, technical staff and managers that accomplish the production task necessary, the workshop has four characteristics: (1) it is a collective ground of elements of productivity formed according to the specialized principle; (2) it is an intermediate link of enterprise management between a factory and a production team; (3) the products of the workshop are generally semi-finished products (except finished workshops) or internal products of enterprises, but not commodities; (4) the workshop is not an independent commodity production and management unit and generally does not directly generate economic connection to the outside.
The ward, operating room or medicine storeroom in hospital all generally adopt centralized air-conditioning system, because the environmental cleanliness requirement of many departments of hospital is higher, so the ventilation volume of its room is several times of that of ordinary air-conditioning room, especially high-grade clean operating room, the number of times of ventilation per hour is from tens to hundreds. In addition, the tail end of the air outlet of the air conditioning system is also specially provided with a high-efficiency air filter.
The existing air draft system is single, and the control precision is not accurate. There is no efficient control method for temperature, humidity, pressure, etc. in the air, and a high waste of energy, which results in higher energy consumption, is obvious.
Accordingly, there is a need for improvements in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an efficient air purification ventilation air conditioner automatic control system.
In order to solve the technical problem, the utility model provides an automatic control system of an air purification ventilation air conditioner, which is used in a workshop and comprises a combined purification air conditioner control system, a workshop temperature/pressure difference monitoring system and a refrigeration station water system;
the combined type purifying air-conditioning system comprises an air inlet pipeline, an air return pipeline, a shutdown anti-freezing protection device, a fresh air valve, a primary-effect filter screen, a preheating device, a blower, a cold water device, a steam device, a middle-effect filter screen, an ozone generating device and an air return valve;
the workshop temperature and humidity/pressure difference control system comprises a return air temperature sensor, a return air humidity sensor, an indoor temperature sensor, an indoor humidity sensor, an indoor pressure sensor, an air supply speed sensor and a man-machine interaction device;
the steam device comprises a steam heating device and a steam humidifying device; the steam heating device is used for heating air, and the steam humidifying device is used for humidifying air;
a shutdown anti-freezing protection device, a fresh air valve, a primary filter screen, a preheating device, a blower, a cold water device, a steam heating device, a steam humidifying device and a primary filter screen are sequentially arranged in the air inlet pipeline from an inlet to an outlet;
the outlet of the air inlet pipeline is communicated with the air inlet of the workshop through an air supply valve;
the air outlet of the workshop is connected with the air inlet pipeline through an air return pipeline provided with an air return valve, the outlet of the air return pipeline is positioned between the primary filter screen and the preheating device,
the refrigerating station water system comprises a first refrigerating pump, a second refrigerating pump, a third refrigerating pump, a fourth refrigerating pump, a heat exchange device and a cooling tower, wherein a water inlet pipeline is connected with a heat release pipeline inlet of the heat exchange device after passing through the first refrigerating pump and the second refrigerating pump which are arranged in parallel; the water inlet pipeline and the water outlet pipeline are respectively connected with the water outlet and the water inlet of the cold water device.
As right the utility model discloses air purification ventilation air conditioner automatic control system's improvement:
a return air temperature sensor and a return air humidity sensor are arranged in the return air pipeline;
an air inlet temperature sensor is arranged at an air inlet of the air inlet pipeline;
an air outlet of the air inlet pipeline is provided with an air supply air speed sensor;
and an indoor temperature sensor, an indoor humidity sensor and an indoor pressure sensor are arranged in the working room.
As right the utility model discloses air purification ventilation air conditioner automatic control system's improvement:
the shutdown anti-freezing protection device comprises a constant-temperature water circulation pipeline and a constant-temperature water tank, the constant-temperature water circulation pipeline is connected with the constant-temperature water tank, a circulating water pump is arranged on the constant-temperature water circulation pipeline, and the constant-temperature water circulation pipeline is arranged on the inner wall of an inlet of the air inlet pipeline.
As right the utility model discloses air purification ventilation air conditioner automatic control system's improvement:
the primary filter screen comprises four grade filter cotton layers of G1 grade, G2 grade, G3 grade and G4 grade and is used for filtering dust particles with the particle size of more than 5 mu m;
the medium-efficiency filter screen comprises four grades of filter cotton layers of F5 grade, F6 grade, F7 grade and F8 grade and is used for filtering dust particles with the particle size of 1-5 mu m.
As right the utility model discloses air purification ventilation air conditioner automatic control system's improvement:
the ozone generating device comprises an ozone generator and an electric valve, wherein the outlet of the ozone generator is connected with the outlet of the air inlet pipeline through the electric valve by a pipeline.
As right the utility model discloses air purification ventilation air conditioner automatic control system's improvement:
flow/wind speed sensing devices are arranged at the front end and the rear end of the primary filter screen and the middle filter screen.
The utility model discloses air purification ventilation air conditioner automatic control system's technical advantage does:
the utility model discloses air purification ventilation air conditioner automatic control system includes that combination formula purifies air conditioner control system, workshop humiture/pressure differential monitored control system, refrigeration station water system and PLC controller, through accurate control, can ensure automatically that temperature, humidity, pressure etc. in every workshop are suitable.
Drawings
The following describes the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a combined type purifying air-conditioning control system of the automatic control system of the air purifying ventilation air-conditioning of the present invention;
FIG. 2 is a schematic structural diagram of a refrigeration station water system of the automatic control system for air purification, ventilation and air conditioning of the present invention;
fig. 3 is the structure diagram of the utility model of the PLC controller 30 of the automatic control system of the air purification ventilation air conditioner and the signal connection of the combined purification air conditioner control system, the workshop temperature/pressure difference monitoring system and the refrigeration station water system.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Embodiment 1, an air purification ventilation air-conditioning automatic control system, as shown in fig. 1-3, is used in a workshop 13, and includes a combined purification air-conditioning control system, a workshop temperature/humidity/pressure difference monitoring system, a refrigeration station water system, and a PLC controller 30.
The combined purifying air conditioning system comprises an air inlet pipeline 1, an air return pipeline 19, a shutdown anti-freezing protection device 22, a fresh air valve 2, a primary effect filter screen 3, a preheating device 4, a blower 5, a cold water device 6, a steam device, a medium effect filter screen 9, an ozone generating device 10 and an air return valve 20.
When the system heats in winter, the outside temperature is very low, and if only one group of heating is used, the set temperature of the system can not be achieved. So the utility model discloses air purification ventilation air conditioner automatic control system has set up two group's heats (preheating device 4 and steam heating device 7), and external cold air can be at first through preheating device 4 heating, and the temperature can rise some, then heats through steam heating device 7 again, reaches the temperature that the system set for.
The workshop temperature and humidity/pressure difference control system comprises a return air temperature sensor 18, a return air humidity sensor 17, an indoor temperature sensor 14, an indoor humidity sensor 15, an indoor pressure sensor 16, an air supply speed sensor 11 and a man-machine interaction device 37.
The steam device comprises a steam heating device 7 and a steam humidifying device 8; the steam heating device 7 is used for heating air, and the steam humidifying device 8 is used for humidifying air.
The PLC 30 is respectively connected with the return air temperature sensor 18, the return air humidity sensor 17, the indoor temperature sensor 14, the indoor humidity sensor 15, the indoor pressure sensor 16, the blower 5, the control device of the fresh air valve 2, the control device of the return air valve 20, the steam heating device 7, the steam humidifying device 8 and the shutdown anti-freezing protection device 22 through signals. The PLC controller 30 is a Siemens S7200-CPU224XP controller.
The air inlet pipeline 1 is sequentially provided with a shutdown anti-freezing protection device 22, a fresh air valve 2, a primary effect filter screen 3, a preheating device 4, a blower 5, a cold water device 6, a steam heating device 7, a steam humidifying device 8 and a primary effect filter screen 9 from an inlet to an outlet.
The shutdown anti-freezing protection device 22 comprises a constant-temperature water circulation pipeline and a constant-temperature water tank, the constant-temperature water circulation pipeline is connected with the constant-temperature water tank, a circulating water pump is arranged on the constant-temperature water circulation pipeline, and the constant-temperature water circulation pipeline is arranged on the inner wall of the inlet of the air inlet pipeline 1. PLC controller 30 can be through air inlet temperature sensor 21 continuous detection ambient temperature, if detect ambient temperature and be less than 0 degree, PLC controller 30 can start circulating water pump, lets water flow to reach frost-proof purpose.
The primary filter screen 3 comprises four grades of filter cotton layers of G1 grade, G2 grade, G3 grade and G4 grade and is used for filtering dust particles with the particle size of more than 5 mu m.
The medium-efficiency filter screen 9 comprises four grades of filter cotton layers of F5 grade, F6 grade, F7 grade and F8 grade and is used for filtering dust particles with the particle size of 1-5 mu m.
The ozone generating device 10 comprises an ozone generator and an electric valve, wherein the outlet of the ozone generator is connected with the outlet of the air inlet pipeline 1 through the electric valve by a pipeline, and the outlet of the air inlet pipeline 1 is communicated with the air inlet of the workshop 13 through an air supply valve 12;
an air outlet of the workshop 13 is connected with the air inlet pipeline 1 through a return air pipeline 19 provided with a return air valve 20, an outlet of the return air pipeline 19 is positioned between the primary filter screen 3 and the preheating device 4, and a return air temperature sensor 18 and a return air humidity sensor 17 are arranged in the return air pipeline 19; the temperature sensor is used for detecting the return air temperature and the return air humidity.
An air inlet of the air inlet pipeline 1 is provided with an air inlet temperature sensor 21, the air inlet temperature sensor 21 is used for detecting the atmospheric temperature and judging whether the atmospheric temperature is in winter, so that whether the preheating device 4 is started to ensure the room temperature is determined, and the combined type purification air-conditioning system can be prevented from being started in a supercooled environment.
An air outlet of the air inlet pipeline 1 is provided with an air supply air speed sensor 11, and the air supply air speed sensor 11 is used for detecting the air speed of supplied air.
The work room 13 may include a dosing room, a capping room, a bottle wash, a hospital room, an operating room, or a drug storage room, among others.
An indoor temperature sensor 14, an indoor humidity sensor 15 and an indoor pressure sensor 16 are arranged in the workshop 13, and the indoor temperature sensor 14, the indoor humidity sensor 15 and the indoor pressure sensor 16 respectively acquire the temperature, the humidity and the pressure of the workshop 13.
The indoor temperature sensor 14 and the indoor humidity sensor 15 are wall-mounted temperature and humidity sensors, and the indoor pressure sensor 16 is a digital display differential pressure sensor.
The PLC 30 is respectively connected with the shutdown anti-freezing protection device 22, the fresh air valve 2, the preheating device 4, the blower 5, the cold water device 6, the steam device, the ozone generating device 10, the temperature sensor, the humidity sensor, the pressure sensor, the return air valve 20 and the man-machine interaction device 37.
The human-computer interaction device 37 may use a resistive touch screen, the human-computer interaction device 37 uses a kunlun/wilon 10-inch touch screen, and a user may preset a temperature set value, a humidity set value, a wind speed set value, a room temperature set value, and a room pressure difference set value in the PLC controller 30 through the human-computer interaction device 37 as a basis for subsequent automatic control.
The PLC controller 30 may be a PLC controller model EC2N-48 MR.
The automatic control system for the air purification ventilation air conditioner further comprises an alarm device 38, wherein the alarm device 38 is a plurality of audible and visual alarms, and the audible and visual alarms can be used for giving an alarm when each device breaks down or operates abnormally.
The PLC controller 30 can detect a screen blockage. Flow/wind speed sensing devices are arranged at the front end and the rear end of the primary filter screen 3 and the middle filter screen 9, and are used for collecting the air inlet and outlet strength information passing through the filter screens and obtaining air inlet and outlet strength signals; and if the difference of the air inlet strength and the air outlet strength exceeds a threshold value, judging that the filter screen is blocked.
The control method of the automatic control system of the air purification ventilation air conditioner comprises the following steps:
1) and temperature control: the PLC 30 compares the return air temperature signal detected by the return air temperature sensor 18 in the return air pipeline 19 with a temperature set value, performs PID adjustment, performs calculation according to the functional relation of proportion, integral and differential, and controls the opening of the automatic proportional control water cooling device 6 to reduce the temperature or controls the opening of the proportional opening steam heating device 7 to increase the temperature according to the calculation result so as to achieve the purpose of controlling the temperature.
2) And humidity control: the PLC 30 compares the return air humidity signal detected by the return air humidity sensor 17 in the return air pipeline 19 with a humidity set value, and then automatically adjusts the opening degree of the water cooling device 6 to dehumidify or proportionally opens the opening degree of the steam humidifying device 8 to humidify.
3) And controlling the wind speed: the PLC controller 30 compares the air supply speed signal detected by the air supply speed sensor 11 with a set air speed value, and then automatically adjusts the output frequency of the blower 5 in a proportional manner.
4) And monitoring the temperature, the humidity and the pressure difference of the room: the PLC 30 is used for uploading the signals of the temperature, the humidity and the pressure of the workshop detected by the indoor temperature sensor 14, the indoor humidity sensor 15 and the indoor pressure sensor 16 to a computer for display/storage/record.
The PLC controller 30 compares the room pressure difference setting value with the pressure signal of the plant, performs PID adjustment, performs calculation according to a functional relationship of proportion, integral, and differential, and automatically adjusts the opening of the blast valve 12 according to the calculation result to adjust the pressure difference.
When the room personnel flow to open and close the door, in order to avoid the pressure difference error control or the error recording, the PLC 30 keeps the original working state, delays for 15 seconds and then carries out control adjustment.
The signal detected by the indoor humidity sensor 15 functions to control the humidity in the room. When the system operates, the PLC detects the humidity in real time through the indoor humidity sensor, then sends the detection value to the humidity PID regulator, the PID regulator calculates according to the input deviation value and the function relation of proportion, integral and differential, and the calculation result is sent to the humidifier or the dehumidification steam valve.
The method specifically comprises the following steps: the PLC 30 compares the set value of the room pressure difference with the pressure signal of the workshop;
if the pressure signal of the workshop does not meet the set pressure difference value, taking the temperature at the moment as the initial delay temperature, and entering a 15-second delay state;
if the pressure signal of the workshop does not meet the set pressure difference value all the time in the time delay state of 15 seconds, the PLC 30 adjusts the opening degree of the blast valve 12 according to the initial time delay temperature and adjusts the pressure difference;
5) when the disinfection is selected, the start and stop of the ozone generator of the ozone generating device 10 can be controlled according to the set disinfection time. When in disinfection, the fresh air valve 2 and the corresponding blower 5 are closed; when the set disinfection time is reached and the disinfection is finished, the working state is automatically recovered, and the ozone generator of the ozone generating device 10 is started, wherein the starting time can be set.
6) And (4) anti-freezing protection, namely judging the temperature is winter when the inlet air temperature sensor 21 detects that the temperature of the fresh air inlet is lower than 10 ℃. In winter, the steam preheating valve of the preheating device 4 remains 10% open at shutdown. The opening degree can be set according to actual conditions.
The steam preheating valve of the preheating device 4 with 10% opening has the following functions: when the system is stopped in winter, in order to prevent the steam preheating valve from being completely closed, the residual steam in the air inlet pipeline 1 is cooled and frozen to freeze the equipment. And the opening degree of 10 percent is reserved, so that the steam can be in a flowing state all the time, and the anti-freezing protection effect is achieved.
The refrigerating station water system comprises a first freezing pump 31, a second freezing pump 32, a third freezing pump 33, a fourth freezing pump 34, a heat exchange device 35 and a cooling tower 36, a water inlet pipeline is connected with an inlet of a heat release pipeline of the heat exchange device 35 after passing through the first freezing pump 31 and the second freezing pump 32 which are arranged in parallel, an outlet of the heat release pipeline of the heat exchange device 35 is connected with an inlet of the cooling tower 36 after passing through the third freezing pump 33 and the fourth freezing pump 34 which are arranged in parallel, and an outlet of the cooling tower 36 is connected with a water outlet pipeline after passing through a heat absorption pipeline of the heat exchange device 35. The cooling tower 36 is used for cooling the chilled water.
The PLC 30 is respectively connected with the first freezing pump 31, the second freezing pump 32, the third freezing pump 33 and the fourth freezing pump 34 through signals, and the water inlet pipeline and the water outlet pipeline are respectively connected with the water outlet and the water inlet of the water cooling device 6.
When the freezing automatic start-up: starting the first freezing pump 31 for the first time and starting the second freezing pump 32 for the second time, and circulating according to times; the three-refrigerant pump 33 and the four-refrigerant pump 34 perform the same operation. The two pumps are started in sequence, and if one pump works for a long time and does not have a rest, the pump is easy to damage; the other pump is left unused for a long time and is easily affected with damp.
The working process of the refrigeration station water system comprises the following steps:
1) starting a first freezing pump 31 and a third freezing pump 33;
2) the chilled return water enters from the water inlet pipeline, passes through the first chilling pump 31 and then enters the heat release pipeline of the heat exchange device 35, and exchanges heat with the low-temperature cooling water in the heat absorption pipeline of the heat exchange device 35 to become normal-temperature cooling water;
3) and the normal temperature cooling water enters the cooling tower 36 through the third refrigerating pump 33 for heat release, becomes low temperature cooling water, enters the heat absorption pipeline of the heat exchange device 35, and exchanges heat with the cold return water in the heat release pipeline of the heat exchange device 35 to become freezing water supply.
Finally, it is also noted that the above-mentioned list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (6)
1. Air purification ventilation air conditioner automatic control system for workplace (13), its characterized in that: the system comprises a combined type purification air-conditioning control system, a workshop temperature and humidity/pressure difference monitoring system and a refrigeration station water system;
the combined type purification air-conditioning system comprises an air inlet pipeline (1), an air return pipeline (19), a shutdown anti-freezing protection device (22), a fresh air valve (2), a primary effect filter screen (3), a preheating device (4), a blower (5), a cold water device (6), a steam device, a middle effect filter screen (9), an ozone generating device (10) and an air return valve (20);
the workshop temperature and humidity/pressure difference control system comprises a return air temperature sensor (18), a return air humidity sensor (17), an indoor temperature sensor (14), an indoor humidity sensor (15), an indoor pressure sensor (16), an air supply speed sensor (11) and a man-machine interaction device (37);
the steam device comprises a steam heating device (7) and a steam humidifying device (8); the steam heating device (7) is used for heating air, and the steam humidifying device (8) is used for humidifying air;
a shutdown anti-freezing protection device (22), a fresh air valve (2), a primary effect filter screen (3), a preheating device (4), a blower (5), a cold water device (6), a steam heating device (7), a steam humidifying device (8) and a medium effect filter screen (9) are sequentially arranged in the air inlet pipeline (1) from an inlet to an outlet;
the outlet of the air inlet pipeline (1) is communicated with the air inlet of the workshop (13) through an air supply valve (12);
the air outlet of the workshop (13) is connected with the air inlet pipeline (1) through an air return pipeline (19) provided with an air return valve (20), the outlet of the air return pipeline (19) is positioned between the primary filter screen (3) and the preheating device (4),
the refrigeration station water system comprises a first refrigeration pump (31), a second refrigeration pump (32), a third refrigeration pump (33), a fourth refrigeration pump (34), a heat exchange device (35) and a cooling tower (36), wherein a water inlet pipeline is connected with an inlet of a heat release pipeline of the heat exchange device (35) after passing through the first refrigeration pump (31) and the second refrigeration pump (32) which are arranged in parallel, an outlet of the heat release pipeline of the heat exchange device (35) is connected with an inlet of the cooling tower (36) through the third refrigeration pump (33) and the fourth refrigeration pump (34) which are arranged in parallel, and an outlet of the cooling tower (36) is connected with a water outlet pipeline after passing through a heat absorption pipeline of the heat exchange device (35); the water inlet pipeline and the water outlet pipeline are respectively connected with the water outlet and the water inlet of the cold water device (6).
2. The automatic control system of air purification ventilation air conditioner according to claim 1, characterized in that:
a return air temperature sensor (18) and a return air humidity sensor (17) are arranged in the return air pipeline (19);
an air inlet temperature sensor (21) is arranged at an air inlet of the air inlet pipeline (1);
an air outlet of the air inlet pipeline (1) is provided with an air supply air speed sensor (11);
an indoor temperature sensor (14), an indoor humidity sensor (15) and an indoor pressure sensor (16) are arranged in the working room (13).
3. The automatic control system of air purification ventilation air conditioner according to claim 2, characterized in that:
the shutdown anti-freezing protection device (22) comprises a constant-temperature water circulation pipeline and a constant-temperature water tank, the constant-temperature water circulation pipeline is connected with the constant-temperature water tank, a circulating water pump is arranged on the constant-temperature water circulation pipeline, and the constant-temperature water circulation pipeline is arranged on the inner wall of an inlet of the air inlet pipeline (1).
4. The automatic control system of air purification ventilation air conditioner according to claim 3, characterized in that:
the primary filter screen (3) comprises four grade filter cotton layers of G1 grade, G2 grade, G3 grade and G4 grade and is used for filtering dust particles with the particle size of more than 5 mu m;
the medium-efficiency filter screen (9) comprises four grades of filter cotton layers of F5 grade, F6 grade, F7 grade and F8 grade and is used for filtering dust particles with the particle size of 1-5 mu m.
5. The automatic control system of air purification ventilation air conditioner according to claim 4, characterized in that:
the ozone generating device (10) comprises an ozone generator and an electric valve, and the outlet of the ozone generator is connected with the outlet of the air inlet pipeline (1) through the electric valve by a pipeline.
6. The automatic control system of air purification ventilation air conditioner of claim 5, characterized in that:
flow/wind speed sensing devices are arranged at the front end and the rear end of the primary filter screen (3) and the middle filter screen (9).
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| CN202022574340.9U CN213811035U (en) | 2020-11-10 | 2020-11-10 | Automatic control system of air purification ventilation air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116447730A (en) * | 2023-06-09 | 2023-07-18 | 连云港凯瑞拓自动化科技有限公司 | Automatic control method and system for air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116447730A (en) * | 2023-06-09 | 2023-07-18 | 连云港凯瑞拓自动化科技有限公司 | Automatic control method and system for air conditioner |
| CN116447730B (en) * | 2023-06-09 | 2023-11-24 | 连云港凯瑞拓自动化科技有限公司 | Automatic control method and system for air conditioner |
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