CN109883026B - Air conditioning system with independent temperature and humidity control function and control method thereof - Google Patents
Air conditioning system with independent temperature and humidity control function and control method thereof Download PDFInfo
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- CN109883026B CN109883026B CN201910039571.9A CN201910039571A CN109883026B CN 109883026 B CN109883026 B CN 109883026B CN 201910039571 A CN201910039571 A CN 201910039571A CN 109883026 B CN109883026 B CN 109883026B
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Abstract
The invention relates to an air conditioning system with independent temperature and humidity control and a control method thereof, the system comprises a cold and hot water subsystem and a fresh air subsystem, the cold and hot water subsystem comprises a cold and hot water unit and a plate heat exchanger, the cold and hot water unit is connected with the primary side of the plate heat exchanger, the secondary side of the plate heat exchanger is respectively connected with the tail ends of capillaries of each room through a water dividing and collecting device, the fresh air subsystem comprises a fresh air fan, a dehumidifier, a humidifier and an exhaust fan, the fresh air fan, the dehumidifier and the humidifier are sequentially arranged on a pipeline of a fresh air main pipe from left to right, each room is respectively connected with the fresh air main pipe through a fresh air branch pipe, the fresh air branch pipe is provided with a fresh air valve, the exhaust fan is arranged on the pipeline of an exhaust main pipe, each main, Stable operation and low energy consumption; the control method has the advantages of reasonable logic, easy realization, high execution efficiency, safety and reliability.
Description
Technical Field
The invention relates to an air conditioning system, in particular to an air conditioning system with independent temperature and humidity control and a control method of the air conditioning system.
Background
The air conditioning system is used as an infrastructure of a modern building and plays an important role in adjusting the temperature and the humidity. The air conditioning system with independent temperature and humidity control has the advantages of being higher than those of a traditional air conditioning system due to the fact that the mode that the temperature and the humidity are independently controlled is adopted, and the air conditioning system is rapidly developed and applied. The air conditioning system with independent temperature and humidity control usually adopts a capillary as a temperature control tail end, and has the advantages of soft temperature, no blowing feeling, no noise and no bacteria breeding source. However, the existing air conditioning system with independent temperature and humidity control still has many problems to be improved or perfected in practical application, which mainly appear in the following aspects: 1. the non-systematic risks, such as condensation caused by superposition of equipment failure, human errors (owner windowing, pipeline blockage and the like), incapability of ensuring positive pressure in a room (toilet and kitchen exhaust), and the like, are difficult to be completely avoided; 2. the operation mode cannot be set according to the environment and the use requirements (such as home, leaving home and the like), the energy consumption of the system is high, and the overall energy efficiency ratio is low; 3. accidents such as leakage and leakage of an indoor air conditioning water system are difficult to completely avoid, and the safety is poor.
Disclosure of Invention
The invention aims to provide an air conditioning system with independent temperature and humidity control and a control method thereof, wherein the air conditioning system has the advantages of simple structure, convenience in regulation and control, stability in operation and low energy consumption; the control method has the advantages of reasonable logic, easy realization, high execution efficiency, safety and reliability.
In order to solve the problems in the prior art, the air conditioning system with independent temperature and humidity control provided by the invention comprises a cold and hot water subsystem and a fresh air subsystem, wherein the cold and hot water subsystem comprises a cold and hot water unit and a plate heat exchanger, the cold and hot water unit is connected with the primary side of the plate heat exchanger through two water pipes to form a first circulation loop, the secondary side of the plate heat exchanger is respectively connected with the tail ends of capillary tubes of all rooms through two water pipes and a water dividing and collecting device to form a second circulation loop, and water pumps are respectively arranged in the first circulation loop and the second circulation loop; the fresh air subsystem comprises a fresh air fan, a dehumidifier, a humidifier and an exhaust fan, the fresh air fan, the dehumidifier and the humidifier are sequentially arranged on a pipeline of a fresh air main pipe from left to right, each room is respectively connected with the fresh air main pipe through a fresh air branch pipe, a fresh air valve is arranged on the fresh air branch pipe, the exhaust fan is arranged on the pipeline of the exhaust main pipe, each room is respectively connected with the exhaust main pipe through an exhaust branch pipe, and an exhaust air valve is arranged on the exhaust branch pipe.
Further, the air conditioning system with independent temperature and humidity control is characterized in that a bypass water pipe is arranged between the two water pipes of the first circulation loop, and a bypass water valve is arranged on the bypass water pipe; and a bypass air pipe is arranged between the fresh air main pipe and the exhaust main pipe on the left sides of the fresh air fan and the exhaust fan, and a bypass air valve is arranged on the bypass air pipe.
Further, the air conditioning system with independent temperature and humidity control is characterized in that a purifier is arranged on a fresh air main pipe between the fresh air fan and the dehumidifier; and a heat recoverer is arranged between the fresh air main pipe on the left side of the bypass air pipe and the exhaust main pipe.
Furthermore, the air conditioning system with independent temperature and humidity control further comprises a control subsystem, wherein the control subsystem comprises a machine room side control unit and user side control units arranged in all rooms, the machine room side control unit comprises a first controller, the first controller is respectively connected with a cold and hot water unit, a fresh air fan, a dehumidifier and a humidifier, and the first controller is further connected with a building control host; the user side control unit comprises a second controller, a temperature and humidity detector, an air volume detector, a water leakage detector, a windowing detector, a range hood detector and an exhaust fan detector, wherein the temperature and humidity detector, the air volume detector, the water leakage detector, the windowing detector, the range hood detector and the exhaust fan detector are connected with the second controller, and the second controller is also connected with the first controller, a water distributing and collecting device, a fresh air valve and an exhaust air valve which correspond to rooms.
Further, the air conditioning system with independent temperature and humidity control is characterized in that the temperature and humidity detector is used for detecting temperature and humidity, the air volume detector is used for detecting indoor fresh air volume, the water leakage detector is used for detecting whether water leaks from the tail end of the capillary tube, the windowing detector is used for detecting whether windowing is performed, the range hood detector is used for detecting whether a range hood is started, and the exhaust fan detector is used for detecting whether an exhaust fan is started; the first controller and the second controller are also correspondingly connected with a first human-machine operation interface and a second human-machine operation interface.
The invention provides a control method of the air conditioning system with independently controlled temperature and humidity, which comprises the following steps:
the method comprises the steps that firstly, a system is started, and each room selects an operation mode through a user side control unit, wherein the operation modes comprise a summer home mode, a summer leaving mode, a winter home mode, a winter leaving mode, a transition season home mode and a transition season leaving mode;
secondly, when a certain room operates in a summer house mode,
a. opening a water dividing and collecting device, a fresh air valve and an exhaust air valve of a corresponding room;
b. detecting the temperature in a room in real time through a temperature and humidity detector, closing the water collecting and distributing device when the difference value between the temperature detection value and the first temperature preset value is smaller than or equal to a temperature difference preset value, and otherwise, opening the water collecting and distributing device;
c. detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to the rated air volume;
thirdly, when a certain room is operated in a summer leaving mode,
d. opening a fresh air valve of a corresponding room, and closing a water dividing and collecting device and an air exhaust valve of the corresponding room;
e. detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to X% of the rated air volume; x is more than or equal to 25 and less than or equal to 35;
fourthly, when a certain room operates in a winter household mode,
f. opening a water dividing and collecting device, a fresh air valve and an exhaust air valve of a corresponding room;
g. detecting the temperature in the room in real time through a temperature and humidity detector, closing the water collecting and distributing device when the difference value between the temperature detection value and the second temperature preset value is greater than or equal to the temperature difference preset value, and otherwise, opening the water collecting and distributing device;
h. detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to Y% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to Y% of the rated air volume; x is more than or equal to 55 and less than or equal to 65 percent;
fifthly, when a certain room operates in a winter leaving mode,
i. opening the water dividing and collecting device and the fresh air valve of the corresponding room, and closing the exhaust air valve of the corresponding room;
j. detecting the temperature in the room in real time through a temperature and humidity detector, closing the water collecting and distributing device when the difference value between the temperature detection value and the third temperature preset value is greater than or equal to the temperature difference preset value, and otherwise, opening the water collecting and distributing device;
k. detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to X% of the rated air volume;
sixthly, when a certain room operates in a transition season home mode,
opening a fresh air valve and an exhaust air valve of a corresponding room, and closing a water distributing and collecting device of the corresponding room;
m, detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to Y% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to Y% of the rated air volume;
seventhly, when a certain room is operated in a transition season leaving-home mode,
n, opening a fresh air valve of the corresponding room, and closing a water dividing and collecting device and an air exhaust valve of the corresponding room;
detecting the indoor fresh air volume in real time through an air volume detector, keeping the opening degree of a fresh air valve when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve until the fresh air volume detection value is equal to X% of the rated air volume;
eighthly, the machine room side control unit detects the opening degree of the fresh air valve in real time through the user side control unit of each room, calculates the average value of the opening degrees of the fresh air valves of all the rooms as the system air valve coefficient,
p, when the air valve coefficient of the system is more than 70% and less than 90%, enabling the fresh air fan to work at the current frequency;
q, when the air valve coefficient of the system is greater than or equal to 90%, enabling the fresh air fan to perform frequency-up operation until the pressure of the fresh air main pipe is increased by Z%, wherein Z is more than or equal to 5 and less than or equal to 10;
r, when the air valve coefficient of the system is less than or equal to 70%, enabling the fresh air fan to operate in a frequency reduction mode until the pressure of the fresh air main pipe is reduced by Z%;
the first temperature preset value, the second temperature preset value and the third temperature preset value are specifically set according to different seasons; the temperature difference preset value is specifically set according to the requirements of the system on sensitivity and stability; the rated air volume is specifically set according to the size of the space.
Further, the control method of the air conditioning system with independent temperature and humidity control provided by the invention further comprises the following steps:
ninthly, when a certain room operates in a summer home mode or a summer away mode,
s, detecting the temperature and the humidity in a room in real time through a temperature and humidity detector and judging whether the temperature and the humidity reach a dew point or not; detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector; detecting whether windowing is performed or not in real time through a windowing detector;
t, when the dew point is reached or water leakage or window opening is carried out, closing the water collecting and distributing device, and sending out an alarm signal through a user side control unit or/and a machine room side control unit; and the treatment priority of dew point, water leakage and windowing is higher than that of temperature.
Further, the control method of the air conditioning system with independent temperature and humidity control provided by the invention further comprises the following steps:
ten, when a certain room is operated in a winter-in-home mode or a winter-out-of-home mode,
u, detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector; detecting whether windowing is performed or not in real time through a windowing detector;
v, when water is leaked, closing the water collecting and distributing device, and sending an alarm signal through a user side control unit or/and a machine room side control unit; when the window is opened, the water dividing and collecting device is opened, and an alarm signal is sent out through the user side control unit or/and the machine room side control unit; and the processing priority of the water leakage is higher than that of the windowing, and the processing priority of the windowing is higher than that of the temperature.
Further, the control method of the air conditioning system with independent temperature and humidity control provided by the invention further comprises the following steps:
eleven, when a certain room is operated in a summer home mode, a winter home mode or a transitional season home mode,
w, detecting whether the range hood is started or not in real time through a range hood detector; detecting whether the exhaust fan is started or not in real time through an exhaust fan detector;
x, when the range hood or the exhaust fan is opened, closing an exhaust air valve, and sending an alarm signal through a user side control unit or/and a machine room side control unit; and the processing priority of the starting of the range hood and the exhaust fan is higher than that of the fresh air volume.
Compared with the prior art, the air conditioning system with the independent temperature and humidity control function and the control method thereof have the following advantages: according to the invention, a cold and hot water subsystem and a fresh air subsystem are arranged, wherein the cold and hot water subsystem comprises a cold and hot water unit and a plate heat exchanger, the cold and hot water unit is connected with a primary side of the plate heat exchanger through two water pipes to form a first circulation loop, a secondary side of the plate heat exchanger is respectively connected with the tail ends of capillaries of each room through two water pipes and a water dividing and collecting device to form a second circulation loop, and water pumps are respectively arranged in the first circulation loop and the second circulation loop; the fresh air subsystem comprises a fresh air fan, a dehumidifier, a humidifier and an exhaust fan, the fresh air fan, the dehumidifier and the humidifier are sequentially arranged on a pipeline of a fresh air main pipe from left to right, each room is respectively connected with the fresh air main pipe through a fresh air branch pipe, a fresh air valve is arranged on the fresh air branch pipe, the exhaust fan is arranged on the pipeline of the exhaust main pipe, each room is respectively connected with the exhaust main pipe through an exhaust branch pipe, and an exhaust air valve is arranged on the exhaust branch pipe. Therefore, the air conditioning system with independent temperature and humidity control, which has the advantages of simple structure, convenience in regulation and control, stability in operation and low energy consumption, is formed. The invention realizes independent control and regulation of temperature and humidity by arranging the cold and hot water subsystem and the fresh air subsystem, has the advantages of flexible control and remarkable energy saving, and can build a comfortable and healthy indoor environment. The control method of the air conditioning system with the independent temperature and humidity control function has the advantages of reasonable logic, easiness in implementation, high execution efficiency, safety and reliability.
The air conditioning system with independent temperature and humidity control and the control method thereof according to the present invention will be further described in detail with reference to the following embodiments shown in the accompanying drawings:
drawings
FIG. 1 is a schematic diagram of an air conditioning system with independent temperature and humidity control according to the present invention;
FIG. 2 is a schematic diagram of a control subsystem in an air conditioning system with independent temperature and humidity control according to the present invention;
FIG. 3 is a flow chart of temperature control in a summer home mode and a summer away mode of the control method;
FIG. 4 is a flow chart of temperature control in a winter home mode and a winter away mode of the control method;
FIG. 5 is a flow chart of fresh air control in the summer home mode and the summer away mode in the control method;
FIG. 6 is a flow chart of fresh air control in the winter home mode, the winter away mode, the transitional season home mode, and the transitional season away mode of the control method;
FIG. 7 is a flow chart of the control of the operating frequency of the fresh air fan in the control method;
FIG. 8 is a flow chart of alarm control of the chiller-heater subsystem in the summer home mode and in the summer away mode of the control method;
FIG. 9 is a flow chart of the alarm control of the hot and cold water sub-system in the winter home mode and the winter away mode of the control method;
FIG. 10 is a flow chart of the alarm control of the fresh air subsystem in the summer home mode, the winter home mode, and the transitional season home mode of the control method.
Detailed Description
First, it should be noted that, the directional terms such as up, down, front, rear, left, right, etc. described in the present invention are only described with reference to the accompanying drawings for understanding, and are not intended to limit the technical solution and the claimed scope of the present invention. The room in the present invention should be understood in a broad sense, and can be an independent space or several spaces which are communicated with each other.
As shown in fig. 1 and 2, the embodiment of the air conditioning system with independent temperature and humidity control according to the present invention includes a cold and hot water subsystem and a fresh air subsystem. The cold and hot water subsystem comprises a cold and hot water unit 11 and a plate type heat exchanger 12, the cold and hot water unit 11 is connected with the primary side of the plate type heat exchanger 12 through two water pipes to form a first circulation loop, the secondary side of the plate type heat exchanger 12 is connected with the tail end 14 of a capillary tube of each room through two water pipes and a water collecting and collecting device 13 to form a second circulation loop, and water pumps 15 are respectively arranged in the first circulation loop and the second circulation loop. The fresh air subsystem comprises a fresh air fan 21, a dehumidifier 22, a humidifier 23 and an exhaust fan 24, the fresh air fan 21, the dehumidifier 22 and the humidifier 23 are sequentially arranged on a pipeline of a fresh air main pipe 25 from left to right, all rooms are respectively connected with the fresh air main pipe 25 through fresh air branch pipes 26, and fresh air valves 27 are arranged on the fresh air branch pipes 26; the exhaust fan 24 is disposed on the duct of the main exhaust duct 28, each room is connected to the main exhaust duct 28 through the exhaust branch duct 29, and the exhaust air valve 210 is disposed on the exhaust branch duct 29. The temperature and humidity independently controlled air conditioning system with simple structure, convenient regulation and control, stable operation and low energy consumption is formed by the structure. According to the invention, the cold and hot water subsystem and the fresh air subsystem are arranged, the temperature is controlled by the cold and hot water subsystem, the humidity is controlled by the fresh air subsystem, the temperature and the humidity are respectively controlled and adjusted, the indoor environment with constant temperature, constant humidity and constant oxygen can be created, and the advantages of flexible control and remarkable energy saving are achieved.
As an optimized scheme, in the embodiment, the bypass water pipe is arranged between the two water pipes of the first circulation loop, the bypass water valve 16 is arranged on the bypass water pipe, the technical purpose of adjusting the water supply temperature of the first circulation loop can be realized by controlling the opening and closing of the bypass water valve 16, and the stability of the system is enhanced. And a bypass air pipe is arranged between the fresh air main pipe 25 and the exhaust main pipe 28 on the left sides of the fresh air fan 21 and the exhaust fan 24, and a bypass air valve 211 is arranged on the bypass air pipe, so that the technical purposes of adjusting the oxygen content of the fresh air and preprocessing the fresh air can be realized by controlling the opening and closing of the bypass air valve 211. Meanwhile, in the embodiment, the fresh air main pipe 25 between the fresh air fan 21 and the dehumidifier 22 is provided with the purifier 212, the heat recoverer 213 is arranged between the fresh air main pipe 25 on the left side of the side ventilation pipe and the exhaust main pipe 28, the fresh air can be filtered through the purifier 212, the cleanliness and freshness of the fresh air are improved, the energy of the exhaust air can be recycled through the heat recoverer 213, the energy consumption is reduced, and the overall energy efficiency ratio is improved.
As a specific implementation mode, the invention is also provided with a control subsystem, and the control subsystem comprises a machine room side control unit and user side control units arranged in all rooms. The machine room side control unit is provided with a first controller 31, and the first controller 31 is respectively connected with the cold and hot water unit 11, the fresh air fan 21, the dehumidifier 22 and the humidifier 23 so as to control the cold and hot water unit, the fresh air fan 21, the dehumidifier 22 and the humidifier 23. And the first controller 31 is connected to the building control host 32 for monitoring. The user side control unit is provided with a second controller 41, and a temperature and humidity detector 42, an air volume detector 43, a water leakage detector 44, a windowing detector 45, a range hood detector 46 and an exhaust fan detector 47 which are connected with the second controller 41, so as to monitor the indoor environment. And the second controller 41 is connected to the first controller 31 and the water collecting and distributing device 13, the fresh air valve 27 and the exhaust air valve 210 of the corresponding room. Wherein, temperature and humidity detector 42 is used for detecting temperature and humidity, and air volume detector 43 is used for detecting the fresh air volume of registering one's residence, and leak water detector 44 is used for detecting capillary end 14 and whether leaks, and windowing detector 45 is used for detecting whether windowing, and lampblack absorber detector 46 is used for detecting whether opening the lampblack absorber, and exhaust fan detector 47 is used for detecting whether opening the exhaust fan. And the first controller 31 and the second controller 41 are correspondingly connected with the first human-machine operation interface 33 and the second human-machine operation interface 48 so as to set system operation parameters and display related information and alarm signals. The invention improves the automation degree by arranging the control subsystem, can realize the technical purposes of reducing energy consumption and improving safety,
based on the same invention concept, the invention also provides a control method of the air conditioning system with the independent temperature and humidity control function, which specifically comprises the following steps:
firstly, starting a system, and selecting an operation mode by each room through a user side control unit. The operation modes comprise six modes of a summer home mode, a summer leaving mode, a winter home mode, a winter leaving mode, a transition season home mode and a transition season leaving mode.
Secondly, when a certain room operates in a summer household mode:
a. and opening the water dividing and collecting device 13, the fresh air valve 27 and the exhaust air valve 210 of the corresponding room.
b. The temperature in the room is detected in real time through the temperature and humidity detector 42, when the difference value between the temperature detection value and the first temperature preset value is smaller than or equal to the temperature difference preset value, the water collecting and distributing device 13 is closed, otherwise, the water collecting and distributing device 13 is opened. The temperature control mode can create a constant temperature environment and can realize the purposes of energy conservation and consumption reduction.
c. The indoor fresh air volume is detected in real time by the air volume detector 43, when the fresh air volume detection value is equal to the rated air volume, the opening degree of the fresh air valve 27 is kept, otherwise, the opening degree of the fresh air valve 27 is adjusted until the fresh air volume detection value is equal to the rated air volume. The air control mode can create a constant humidity and constant oxygen environment and is beneficial to energy conservation.
The first temperature preset value is specifically set according to the requirement of people on the air temperature in summer, and the first temperature preset value is generally set to be about 25 ℃ in the field. The rated air volume is specifically set according to the space size of the room. The temperature difference preset value is specifically set according to the requirements of the system on sensitivity and stability, and is usually set to be 1-2 ℃ in the field.
Thirdly, when a certain room is operated in a summer leaving mode:
d. and opening the fresh air valve 27 of the corresponding room, and closing the water collecting and distributing device 13 and the exhaust air valve 210 of the corresponding room.
e. The indoor fresh air volume is detected in real time by the air volume detector 43, when the fresh air volume detection value is equal to X% of the rated air volume, the opening degree of the fresh air valve 27 is kept, otherwise, the opening degree of the fresh air valve 27 is adjusted until the fresh air volume detection value is equal to X% of the rated air volume.
When no person is at home in summer for a long time, the temperature does not need to be controlled, only small air volume air supply is needed to ensure positive pressure in a room to prevent condensation, and the requirement can be met by setting the value of X to be more than or equal to 25 and less than or equal to 35. The control mode realizes low-energy consumption operation and is beneficial to improving the integral energy efficiency ratio.
Fourthly, when a certain room operates in a winter household mode:
f. and opening the water dividing and collecting device 13, the fresh air valve 27 and the exhaust air valve 210 of the corresponding room.
g. The temperature in the room is detected in real time through the temperature and humidity detector 42, when the difference value between the temperature detection value and the second temperature preset value is larger than or equal to the temperature difference preset value, the water collecting and distributing device 13 is closed, otherwise, the water collecting and distributing device 13 is opened. The temperature control mode can create a constant temperature environment and achieve the purposes of energy conservation and consumption reduction.
h. The indoor fresh air volume is detected in real time by the air volume detector 43, when the fresh air volume detection value is equal to Y% of the rated air volume, the opening degree of the fresh air valve 27 is kept, otherwise, the opening degree of the fresh air valve 27 is adjusted until the fresh air volume detection value is equal to Y% of the rated air volume.
The second temperature preset value is specifically set according to the requirement of people on the air temperature in winter, and the first temperature preset value is generally set to be about 22 ℃ in the field. Compared with summer, the demand for fresh air volume is smaller in winter, and the demand can be met by setting the Y value to be more than or equal to 55 and less than or equal to 65. The air control mode can create a constant humidity and constant oxygen environment and is beneficial to energy conservation.
And fifthly, when a certain room operates in a winter leaving mode:
i. and opening the water dividing and collecting device 13 and the fresh air valve 27 of the corresponding room, and closing the exhaust air valve 210 of the corresponding room.
j. The temperature in the room is detected in real time through the temperature and humidity detector 42, when the difference value between the temperature detection value and the third temperature preset value is larger than or equal to the temperature difference preset value, the water dividing and collecting device 13 is closed, otherwise, the water dividing and collecting device 13 is opened.
k. The indoor fresh air volume is detected in real time by the air volume detector 43, when the fresh air volume detection value is equal to X% of the rated air volume, the opening degree of the fresh air valve 27 is kept, otherwise, the opening degree of the fresh air valve 27 is adjusted until the fresh air volume detection value is equal to X% of the rated air volume.
When no person is in the house for a long time in winter, the room only needs to meet the low temperature of freeze prevention, and the fresh air subsystem only needs to supply air with small air volume to maintain the positive pressure in the room. The third temperature preset value is specifically set according to the requirement of freeze protection on the temperature, and the freeze protection requirement can be met by setting the third temperature preset value to be about 5 ℃. On the basis of realizing energy conservation and consumption reduction, the control mode can effectively prevent freezing and prevent outside dirty air from entering a room, and the air quality is guaranteed.
Sixthly, when a certain room operates in a transition season home mode:
and l, opening a fresh air valve 27 and an exhaust air valve 210 of the corresponding room, and closing the water dividing and collecting device 13 of the corresponding room.
And m, detecting the indoor fresh air volume in real time through the air volume detector 43, keeping the opening degree of the fresh air valve 27 when the fresh air volume detection value is equal to Y% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve 27 until the fresh air volume detection value is equal to Y% of the rated air volume.
The transitional season refers to spring and autumn, the air temperature is appropriate at the moment, and the comfort level in the room can be proved only by the operation of the fresh air subsystem. The wind control mode realizes low-energy consumption operation and improves the overall energy efficiency ratio.
Seventhly, when a certain room is operated in a transition season leaving mode:
and n, opening the fresh air valve 27 of the corresponding room, and closing the water dividing and collecting device 13 and the exhaust air valve 210 of the corresponding room.
And o, detecting the indoor fresh air volume in real time through the air volume detector 43, keeping the opening degree of the fresh air valve 27 when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve 27 until the fresh air volume detection value is equal to X% of the rated air volume.
Compared with a transition season home mode, the control mode further reduces the fresh air volume and enhances the energy-saving effect.
Eighthly, the control unit at the machine room side detects the opening degree of the fresh air valve 27 in real time through the control unit at the user side of each room, and calculates the average value of the opening degrees of the fresh air valves 27 in all the rooms as the system air valve coefficient.
And P, when the air valve coefficient of the system is more than 70% and less than 90%, the fresh air fan works at the current frequency.
And q, when the air valve coefficient of the system is greater than or equal to 90%, enabling the fresh air fan to operate in an up-conversion mode until the pressure of the fresh air main pipe is increased by Z%.
And r, when the air valve coefficient of the system is less than or equal to 70%, the fresh air fan is subjected to frequency reduction operation until the pressure of the fresh air main pipe is reduced by Z%.
The control mode adjusts the operating frequency of the fresh air fan according to the open valve of the fresh air valve of each room, enhances the operating stability of the system, can realize energy conservation, and generally sets the Z value to be more than or equal to 5 and less than or equal to 10 according to different projects and system loads.
As an optimization scheme, the present embodiment sets the following alarm control flow:
ninthly, when a certain room operates in a summer home mode or a summer away mode:
s, detecting the temperature and humidity in the room in real time through the temperature and humidity detector 42 and judging whether the dew point is reached; detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector 44; whether windowing is performed or not is detected in real time by the windowing detector 45.
t, when the dew point is reached or water leakage or window opening is carried out, closing the water collecting and distributing device 13, and sending out an alarm signal through a user side control unit or/and a machine room side control unit; and the treatment priority of dew point, water leakage and windowing is higher than that of temperature.
The control mode improves the safety of the system, can remind workers to process when a fault occurs, and effectively avoids water leakage and condensation risks compared with the prior art.
Further, the following alarm control processes are also set in the present embodiment:
ten, when a certain room is operated in a winter-at-home mode or a winter-away-from-home mode:
u, detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector 44; whether windowing is performed or not is detected in real time by the windowing detector 45.
v, when water is leaked, closing the water collecting and distributing device 13, and sending an alarm signal through a user side control unit or/and a machine room side control unit; when the window is opened, the water dividing and collecting device 13 is opened, and an alarm signal is sent out through the user side control unit or/and the machine room side control unit; and the processing priority of the water leakage is higher than that of the windowing, and the processing priority of the windowing is higher than that of the temperature.
In a similar way, the alarm control mode enhances the anti-leakage and anti-freezing effects and further improves the safety of the system.
As an optimization scheme, the present embodiment further sets the following alarm control flow:
eleven, when a room is operating in summer home mode, winter home mode, or transitional season home mode:
w, detecting whether the range hood is started in real time through a range hood detector 46; whether the exhaust fan is turned on is detected in real time by the exhaust fan detector 47.
x, when the range hood or the exhaust fan is opened, closing the exhaust air valve 210, and sending an alarm signal through the user side control unit or/and the machine room side control unit; and the processing priority of the starting of the range hood and the exhaust fan is higher than the processing priority of the fresh air volume.
The alarm control mode can keep the room in a positive pressure environment, and further improves the safety of the system.
According to the air conditioning system with the independent temperature and humidity control function and the control method thereof, the intelligent operation of changing the air quantity and the water temperature is realized according to different seasons and requirements, compared with the prior art, the non-systematic risks can be effectively avoided, the safety is improved, the energy consumption of the system is reduced, and the overall energy efficiency ratio is improved. It should be noted that, the opening and closing of the water collecting and distributing device is realized by controlling the branch valves.
The above embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the scope of the invention claimed, and various modifications made by the skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims.
Claims (4)
1. A control method of an air conditioning system with independent temperature and humidity control comprises a cold and hot water subsystem, a fresh air subsystem and a control subsystem, wherein the cold and hot water subsystem comprises a cold and hot water unit (11) and a plate type heat exchanger (12), the cold and hot water unit (11) is connected with the primary side of the plate type heat exchanger (12), and the secondary side of the plate type heat exchanger (12) is respectively connected with the tail ends (14) of capillary tubes of all rooms through a water collecting and distributing device (13); the fresh air subsystem comprises a fresh air fan (21), a dehumidifier (22), a humidifier (23) and an exhaust air fan (24), the fresh air fan (21), the dehumidifier (22) and the humidifier (23) are arranged on a pipeline of a fresh air main pipe (25), each room is connected with the fresh air main pipe (25) through a fresh air branch pipe (26), a fresh air valve (27) is arranged on the fresh air branch pipe (26), the exhaust air fan (24) is arranged on a pipeline of an exhaust air main pipe (28), each room is connected with the exhaust air main pipe (28) through an exhaust air branch pipe (29), and an exhaust air valve (210) is arranged on the exhaust air branch pipe (29); the control subsystem comprises a machine room side control unit and user side control units arranged in all rooms, the machine room side control unit comprises a first controller (31), and the first controller (31) is respectively connected with the cold and hot water unit (11), the fresh air fan (21), the dehumidifier (22) and the humidifier (23); the user side control unit comprises a second controller (41), a temperature and humidity detector (42), an air volume detector (43), a water leakage detector (44), a windowing detector (45), a range hood detector (46) and an exhaust fan detector (47) which are connected with the second controller (41), and the second controller (41) is also connected with the first controller (31), a water collecting and distributing device (13), a fresh air valve (27) and an exhaust air valve (210) of a corresponding room; the control method is characterized by comprising the following steps:
the method comprises the steps that firstly, a system is started, and each room selects an operation mode through a user side control unit, wherein the operation modes comprise a summer home mode, a summer leaving mode, a winter home mode, a winter leaving mode, a transition season home mode and a transition season leaving mode;
secondly, when a certain room operates in a summer house mode,
a. opening a water dividing and collecting device (13), a fresh air valve (27) and an exhaust air valve (210) of a corresponding room;
b. the temperature in a room is detected in real time through a temperature and humidity detector (42), when the difference value between the temperature detection value and the first temperature preset value is smaller than or equal to the temperature difference preset value, the water collecting and distributing device (13) is closed, otherwise, the water collecting and distributing device (13) is opened;
c. detecting the indoor fresh air volume in real time through an air volume detector (43), keeping the opening degree of a fresh air valve (27) when the fresh air volume detection value is equal to the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to the rated air volume;
thirdly, when a certain room is operated in a summer leaving mode,
d. opening a fresh air valve (27) of a corresponding room, and closing a water dividing and collecting device (13) and an exhaust air valve (210) of the corresponding room;
e. detecting the indoor fresh air volume in real time through an air volume detector (43), keeping the opening degree of a fresh air valve (27) when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to X% of the rated air volume; x is more than or equal to 25 and less than or equal to 35;
fourthly, when a certain room operates in a winter household mode,
f. opening a water dividing and collecting device (13), a fresh air valve (27) and an exhaust air valve (210) of a corresponding room;
g. the temperature in a room is detected in real time through a temperature and humidity detector (42), when the difference value between the temperature detection value and a second temperature preset value is larger than or equal to a temperature difference preset value, the water distributing and collecting device (13) is closed, otherwise, the water distributing and collecting device (13) is opened;
h. detecting the indoor fresh air volume in real time through an air volume detector (43), keeping the opening degree of a fresh air valve (27) when the fresh air volume detection value is equal to Y% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to Y% of the rated air volume; y is more than or equal to 55 and less than or equal to 65;
fifthly, when a certain room operates in a winter leaving mode,
i. opening a water dividing and collecting device (13) and a fresh air valve (27) of a corresponding room, and closing an exhaust air valve (210) of the corresponding room;
j. the temperature in a room is detected in real time through a temperature and humidity detector (42), when the difference value between the temperature detection value and a third temperature preset value is larger than or equal to a temperature difference preset value, the water distributing and collecting device (13) is closed, otherwise, the water distributing and collecting device (13) is opened;
k. detecting the indoor fresh air volume in real time through an air volume detector (43), keeping the opening degree of a fresh air valve (27) when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to X% of the rated air volume;
sixthly, when a certain room operates in a transition season home mode,
l, opening a fresh air valve (27) and an exhaust air valve (210) of the corresponding room, and closing a water distributing and collecting device (13) of the corresponding room;
m, detecting the indoor fresh air volume in real time through the air volume detector (43), keeping the opening degree of the fresh air valve (27) when the fresh air volume detection value is equal to Y% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to Y% of the rated air volume;
seventhly, when a certain room is operated in a transition season leaving-home mode,
n, opening a fresh air valve (27) of the corresponding room, and closing a water dividing and collecting device (13) and an exhaust air valve (210) of the corresponding room;
detecting the indoor fresh air volume in real time through the air volume detector (43), keeping the opening degree of the fresh air valve (27) when the fresh air volume detection value is equal to X% of the rated air volume, and otherwise, adjusting the opening degree of the fresh air valve (27) until the fresh air volume detection value is equal to X% of the rated air volume;
eighthly, the machine room side control unit detects the opening degree of the fresh air valve (27) in real time through the user side control unit of each room, calculates the average value of the opening degrees of the fresh air valves (27) of all the rooms as the system air valve coefficient,
p, when the air valve coefficient of the system is more than 70% and less than 90%, enabling the fresh air fan to work at the current frequency;
q, when the air valve coefficient of the system is greater than or equal to 90%, enabling the fresh air fan to perform frequency-up operation until the pressure of the fresh air main pipe is increased by Z%, wherein Z is more than or equal to 5 and less than or equal to 10;
r, when the air valve coefficient of the system is less than or equal to 70%, enabling the fresh air fan to operate in a frequency reduction mode until the pressure of the fresh air main pipe is reduced by Z%;
the first temperature preset value, the second temperature preset value and the third temperature preset value are specifically set according to different seasons; the temperature difference preset value is specifically set according to the requirements of the system on sensitivity and stability; the rated air volume is specifically set according to the size of the space.
2. The method for controlling the air conditioning system with the independent temperature and humidity control function according to claim 1, further comprising the following steps:
ninthly, when a certain room operates in a summer home mode or a summer away mode,
s, detecting the temperature and the humidity in the room in real time through a temperature and humidity detector (42) and judging whether the temperature and the humidity reach a dew point or not; detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector (44); detecting whether to open the window in real time through a windowing detector (45);
t, when the dew point is reached or water leakage or window opening is carried out, the water collecting and distributing device (13) is closed, and an alarm signal is sent out through a user side control unit or/and a machine room side control unit; and the treatment priority of dew point, water leakage and windowing is higher than that of temperature.
3. The method for controlling the air conditioning system with the independent temperature and humidity control function according to claim 2, further comprising the following steps:
ten, when a certain room is operated in a winter-in-home mode or a winter-out-of-home mode,
u, detecting whether the tail end of the capillary tube leaks water in real time through a water leakage detector (44); detecting whether to open the window in real time through a windowing detector (45);
v, when water is leaked, closing the water collecting and distributing device (13), and sending an alarm signal through a user side control unit or/and a machine room side control unit; when the window is opened, the water dividing and collecting device (13) is opened, and an alarm signal is sent out through the user side control unit or/and the machine room side control unit; and the processing priority of the water leakage is higher than that of the windowing, and the processing priority of the windowing is higher than that of the temperature.
4. The method for controlling the air conditioning system with the independent temperature and humidity control function according to claim 3, further comprising the following steps:
eleven, when a certain room is operated in a summer home mode, a winter home mode or a transitional season home mode,
w, detecting whether the range hood is started or not in real time through a range hood detector (46); detecting whether the exhaust fan is started or not in real time through an exhaust fan detector (47);
x, when the range hood or the exhaust fan is opened, closing an exhaust air valve (210), and sending an alarm signal through a user side control unit or/and a machine room side control unit; and the processing priority of the starting of the range hood and the exhaust fan is higher than that of the fresh air volume.
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| CN113203170B (en) * | 2021-05-11 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Air outlet control method of air duct machine and air duct machine |
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| JPH09243135A (en) * | 1996-03-12 | 1997-09-16 | Mitsubishi Heavy Ind Ltd | Thermal accumulating type air conditioner |
| KR20130084041A (en) * | 2012-01-16 | 2013-07-24 | (주)태환공조시스템 | Combining form air conditioning system and operating method thereof |
| CN104879856A (en) * | 2015-01-13 | 2015-09-02 | 李国胜 | Centralized radiative air-conditioning system with household control function |
| US10222109B2 (en) * | 2016-01-22 | 2019-03-05 | Lennox Industries Inc. | Space temperature and discharge air temperature control |
| CN108895579B (en) * | 2018-05-25 | 2020-05-08 | 江苏盛世机电工程有限公司 | Five-constant ecological air conditioning system and temperature and humidity adjusting method |
| CN108679774A (en) * | 2018-05-30 | 2018-10-19 | 国安瑞（北京）科技有限公司 | A kind of progress control method of fresh air system and fresh air system |
| CN208282332U (en) * | 2018-06-05 | 2018-12-25 | 山西开源益通矿业设备制造有限公司 | It is a kind of to utilize underground heat fresh air system |
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