CN114992738A - Fresh air radiation cooling and heating control method and system - Google Patents
Fresh air radiation cooling and heating control method and system Download PDFInfo
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- CN114992738A CN114992738A CN202210887977.4A CN202210887977A CN114992738A CN 114992738 A CN114992738 A CN 114992738A CN 202210887977 A CN202210887977 A CN 202210887977A CN 114992738 A CN114992738 A CN 114992738A
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- 230000005855 radiation Effects 0.000 title claims abstract description 167
- 238000001816 cooling Methods 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000009833 condensation Methods 0.000 claims abstract description 22
- 230000005494 condensation Effects 0.000 claims abstract description 22
- 238000007791 dehumidification Methods 0.000 claims description 14
- 239000013589 supplement Substances 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0089—Systems using radiation from walls or panels
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the technical field of air conditioners, in particular to a fresh air radiation cooling and heating control method and a fresh air radiation cooling and heating control system, wherein the method comprises the steps of arranging a radiation air conditioner and a fresh air dehumidifying unit indoors, starting the radiation air conditioner, calculating the temperature difference between a radiation plate and the indoor dew-point temperature, adjusting the opening of a water supply valve of the radiation air conditioner according to the temperature difference, starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the humidity difference, and opening and/or increasing a water mixing valve of the radiation air conditioner if the indoor relative humidity is greater than a preset first relative humidity threshold value, so that the temperature of the radiation air conditioner is increased, and meanwhile, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is increased, and the dehumidifying capacity is improved; adjusting the indoor temperature and humidity to set temperature and humidity; the invention carries out joint control on the cooling/heating of the fresh air dehumidifying unit and the radiation air conditioner, increases the running reliability of the system and effectively prevents condensation.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fresh air radiation cooling and heating control method and system.
Background
In the existing control method of the radiation air conditioner, a fresh air dehumidification unit and indoor radiation cooling/heating are independent work, indoor humidity is monitored through an indoor temperature and humidity sensor, a radiation cooling module is closed before the dew point temperature of a cold radiation surface is reached, a fresh air system is in a 24h normally open state, after the indoor humidity is reduced, the radiation cooling module is started again, namely, the intermittent control mode is adopted, and the requirement of indoor comfort is difficult to meet. Meanwhile, the single operation mode of each module only meets the operation of the most basic system, and large electric energy waste exists.
Disclosure of Invention
Aiming at the defects of the technology, the invention aims to provide a fresh air radiation cooling and heating control method and a fresh air radiation cooling and heating control system, and solves the problems that the existing radiation air conditioner and a fresh air dehumidifying unit are mostly controlled singly, condensation treatment is not timely, bacteria are increased, the infection probability is increased for users, and the comfort is poor.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a fresh air radiation cooling and heating control method, which comprises the following steps: a radiation air conditioner and a fresh air dehumidification unit are arranged indoors,
starting the radiation air conditioner, calculating the temperature difference between a radiation plate and the indoor dew point temperature, and adjusting the opening of a water supply valve of the radiation air conditioner according to the temperature difference, wherein if the temperature difference is large, the opening of the water supply valve of the radiation air conditioner is large, and if the temperature difference is small, the opening of the water supply valve of the radiation air conditioner is small;
synchronously starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, calculating a moisture content difference between an outdoor moisture content and an indoor set moisture content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the moisture content difference, wherein if the moisture content difference is large, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is large, and if the moisture content difference is small, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is small;
if the indoor relative humidity is larger than a preset first relative humidity threshold value, a water mixing valve of the radiation air conditioner is opened and/or increased, and the temperature of the radiation air conditioner is increased;
the radiant air conditioner adjusts an indoor temperature to a set temperature.
Further, if the indoor relative humidity is greater than a preset first relative humidity threshold value, the water mixing valve of the radiation air conditioner is opened and/or increased, the temperature of the radiation air conditioner is increased, and the method comprises the following steps:
s1, if the indoor relative humidity is larger than a preset second relative humidity threshold value, adjusting the opening of a water mixing valve of the radiant air conditioner to be fully opened, recording the opening value A of a return air valve of the fresh air dehumidifying unit, and adjusting the opening of the return air valve of the fresh air dehumidifying unit to be fully opened until the indoor relative humidity is smaller than or equal to the preset second relative humidity threshold value;
s2, if the indoor relative humidity is larger than a preset first relative humidity threshold value and smaller than or equal to a preset second relative humidity threshold value, adjusting the opening of a water mixing valve of the radiation air conditioner according to the difference value between the indoor dew point temperature and the lowest temperature of the radiation plate, and adjusting the opening of an air return valve of the fresh air dehumidification unit to be the opening value A until the indoor relative humidity is smaller than or equal to the preset first relative humidity threshold value;
and S3, if the indoor relative humidity is less than or equal to a preset first relative humidity threshold value, closing a water mixing valve of the radiation air conditioner, and opening an exhaust valve of the fresh air dehumidification unit.
Furthermore, the fresh air dehumidifying unit comprises an air return pipe and an exhaust pipe, wherein the air return valve is arranged in the air return pipe, the exhaust valve is arranged in the exhaust pipe, the air return pipe is communicated with the outdoor fresh air pipe of the fresh air dehumidifying unit, and indoor air is led into the outdoor fresh air pipe of the fresh air dehumidifying unit.
Furthermore, the exhaust pipe and the fresh air supplement pipe are internally provided with a split type heat exchange pipe, and the exhaust pipe and the fresh air supplement pipe are subjected to heat transfer through the split type heat exchange pipe.
Further, the radiant air conditioner adjusts an indoor temperature to a set temperature, including:
the radiant air conditioner is operated, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold;
when the radiation air conditioner is used for cooling, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced;
when the radiation air conditioner is used for heating, and the indoor temperature is larger than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiation air conditioner is reduced.
The invention also provides a fresh air radiation cooling and heating control system, which comprises: the indoor radiation air conditioner, the fresh air dehumidifying unit, the radiation air conditioner starting adjusting module, the fresh air dehumidifying unit starting adjusting module and the condensation removing module are arranged;
the radiation air conditioner starts the regulation module for start the radiation air conditioner calculates the difference in temperature of radiation board and indoor dew point temperature, according to the size of difference in temperature is adjusted the aperture of the feed water valve of radiation air conditioner, if the difference in temperature is big, then the aperture of the feed water valve of radiation air conditioner is big, if the difference in temperature is little, then the aperture of the feed water valve of radiation air conditioner is little
The fresh air dehumidifying unit starting adjusting module is used for synchronously starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, calculating a humidity content difference between an outdoor humidity content and an indoor set humidity content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the humidity content difference, wherein if the humidity content difference is large, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is large, and if the humidity content difference is small, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is small;
the condensation removing module is used for opening and/or increasing a water mixing valve of the radiation air conditioner if the indoor relative humidity is larger than a preset first relative humidity threshold value, so as to improve the temperature of the radiation air conditioner;
the radiation air conditioner is used for adjusting the indoor temperature to a set temperature.
Further, the condensation removing module comprises a first adjusting unit, a second adjusting unit and a third adjusting unit;
the first adjusting unit is configured to, if the indoor relative humidity is greater than a preset second relative humidity threshold, adjust an opening of a water mixing valve of the radiant air conditioner to full open, record an opening value a of an air return valve of the fresh air dehumidifier unit, and adjust an opening of an air return valve of the fresh air dehumidifier unit to full open until the indoor relative humidity is less than or equal to the preset second relative humidity threshold;
the second adjusting unit is configured to adjust an opening degree of a water mixing valve of the radiation air conditioner according to a difference between the indoor dew point temperature and the lowest temperature of the radiation plate and adjust an opening degree of a return air valve of the fresh air dehumidifying unit to the opening degree value a until the indoor relative humidity is less than or equal to the preset first relative humidity threshold value if the indoor relative humidity is greater than the preset first relative humidity threshold value and is less than or equal to the preset second relative humidity threshold value;
and the third adjusting unit is used for closing the water mixing valve of the radiation air conditioner and opening the exhaust valve of the fresh air dehumidifying unit if the indoor relative humidity is less than or equal to a preset first relative humidity threshold value.
Furthermore, the fresh air dehumidifying unit comprises an air return pipe and an exhaust pipe, wherein the air return valve is arranged in the air return pipe, the exhaust valve is arranged in the exhaust pipe, the air return pipe is communicated with the outdoor fresh air pipe of the fresh air dehumidifying unit, and indoor air is led into the outdoor fresh air pipe of the fresh air dehumidifying unit.
Furthermore, the exhaust pipe and the fresh air supplement pipe are internally provided with a split type heat exchange pipe, and the exhaust pipe and the fresh air supplement pipe are subjected to heat transfer through the split type heat exchange pipe.
Further, the radiant air conditioner for adjusting an indoor temperature to a set temperature includes:
the radiation air conditioner operates, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold value;
when the radiation air conditioner is used for cooling, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced;
when the radiation air conditioner is used for heating, and the indoor temperature is larger than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiation air conditioner is reduced.
The invention has the beneficial effects that:
1. the fresh air dehumidifying unit and the radiation air conditioner are used for cooling/heating combined control, so that the running reliability of the system is improved, and condensation is effectively prevented;
2. dry and wet separation, centralized treatment of wet load, and the radiation air conditioner in the room is only responsible for providing cold and hot load, so as to prevent water-borne bacteria and viruses from breeding and preventing indoor air outlets from mildewing;
3. the water mixing control radiation air conditioner water supply temperature improves the reaction speed of the system to the sudden humidifying load and improves the condensation risk coping grade of the system.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a fresh air radiation cooling and heating control method according to an embodiment of the present invention;
FIG. 2 is a schematic view of an installation of a radiation air conditioner and a fresh air dehumidifier unit according to an embodiment of the present invention;
fig. 3 is a schematic view of a fresh air radiation cooling and heating control system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
It should be noted that these examples are only for illustrating the present invention, and not for limiting the present invention, and the simple modification of the method based on the idea of the present invention is within the protection scope of the present invention.
Referring to fig. 1, a fresh air radiation cooling and heating control method includes: a radiation air conditioner and a fresh air dehumidification unit are arranged indoors,
starting the radiation air conditioner, calculating the temperature difference between a radiation plate and the indoor dew point temperature, adjusting the opening degree of a water supply valve of the radiation air conditioner according to the temperature difference, wherein if the temperature difference is large, the opening degree of the water supply valve of the radiation air conditioner is large, and if the temperature difference is small, the opening degree of the water supply valve of the radiation air conditioner is small;
wherein the temperature difference Δ T1= T Radiation plate -Tc, wherein T Radiation plate Representing the temperature of the panel surface of the radiant panel, and judging the dew point temperature Tc under the current condition according to the indoor humidity and the temperature;
synchronously starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, calculating the humidity content difference between outdoor humidity content and indoor set humidity content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the humidity content difference, wherein the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is large if the humidity content difference is large, and the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is small if the humidity content difference is small;
wherein the moisture content difference Δ d = outdoor humidity (moisture content) d 0 Indoor set humidity (moisture content) d Indoor use (ii) a The fresh air dehumidifying unit is started for the first time, if the default delta d is more than or equal to 7g/kg (the delta d is generally more than 10g/kg in rainy and humid days in the south, if the external environment of the building is relatively dry in summer, the delta d is 6-10g/kg, and under the large background of energy conservation, the default dehumidified moisture-containing unitThe quantity difference is 7 g/kg), namely the water supply valve of the surface cooler operates at the maximum opening degree, the air supply valve and the air return valve of the fresh air dehumidifying unit are opened, the exhaust valve of the fresh air dehumidifying unit is closed, the indoor internal circulation air supply working condition is operated, indoor humid air is rapidly treated, and condensation is avoided;
if the indoor relative humidity is larger than a preset first relative humidity threshold value, a water mixing valve of the radiation air conditioner is opened and/or increased, and the temperature of the radiation air conditioner is increased;
the radiant air conditioner adjusts the indoor temperature to a set temperature.
Referring to fig. 2, a specific arrangement mode of an indoor radiation air conditioner and a fresh air dehumidification unit is provided.
Wherein, the radiation air conditioner conventionally arranges the radiation plate at the ceiling, the water supply valve of the radiation air conditioner is used for regulating the water supply amount in the radiation air conditioner (radiation plate); the water mixing valve of the radiation air conditioner is used for controlling the mixing of another or a plurality of water sources of the radiation air conditioner and the first water supply pipe of the radiation air conditioner or controlling the mixing of a water return pipe of the radiation air conditioner and the first water supply pipe of the radiation air conditioner so as to adjust the temperature of water in the first water supply pipe of the radiation air conditioner.
Fresh air dehumidifying unit sets up supply-air outlet and air outlet respectively indoor, the air outlet is connected out the tuber pipe, it divide into exhaust pipe and return air duct to go out the tuber pipe, still be provided with electric heater unit in the tuber pipe that the supply-air outlet is connected, can further be accurate adjust the air supply temperature, the feed water valve of fresh air dehumidifying unit's surface cooler is used for controlling the size that supplies water in the surface cooler, the surface cooler sets up in the starting end of supply-air duct, be used for carrying out water-cooling/heat to the air in the supply-air duct, the temperature to the air in the supply-air duct is adjusted.
As an embodiment, if the indoor relative humidity is greater than the preset first relative humidity threshold, the water mixing valve of the radiant air conditioner is opened and/or increased to increase the temperature of the radiant air conditioner, including:
s1, if the indoor relative humidity is larger than a preset second relative humidity threshold value, adjusting the opening degree of a water mixing valve of the radiation air conditioner to be fully opened, recording the opening degree value A of a return air valve of the fresh air dehumidifying unit, and adjusting the opening degree of the return air valve of the fresh air dehumidifying unit to be fully opened until the indoor relative humidity is smaller than or equal to the preset second relative humidity threshold value;
the opening degree of the air return valve is determined in the heating and ventilation design, is a system design value, is generally a rated value, and can be changed at the background according to the requirements of different places;
the preset second relative humidity threshold value can be 80% -95%, and the larger the indoor condensation risk is, the smaller the value is; the opening of the water mixing valve is adjusted to be fully opened, so that the temperature of the radiant air conditioner can be quickly raised, condensation is avoided, the opening of the return air valve of the fresh air dehumidifying unit is further adjusted to be fully opened, air with high indoor humidity is pumped out of the room, the condensation is controlled by double means, and the indoor condensation can be effectively guaranteed;
s2, if the indoor relative humidity is larger than a preset first relative humidity threshold value and smaller than or equal to a preset second relative humidity threshold value, adjusting the opening of a water mixing valve of the radiation air conditioner according to the difference value between the indoor dew point temperature and the lowest temperature of the radiation plate, and adjusting the opening of an air return valve of the fresh air dehumidification unit to be an opening value A until the indoor relative humidity is smaller than or equal to the preset first relative humidity threshold value;
opening K of the water mixing valve is not required to be opened (xi-delta t)/xi 100 percent; if delta t is larger than or equal to xi, K =0 is taken, and the water mixing valve is closed; wherein xi is the residual amount of system condensation, and is generally 0.3-2 deg.C, and Δ T = T Minimum temperature of radiation plate -Tc, Tc being the dew point temperature;
the preset first relative humidity threshold value can be 65%, condensation basically does not occur indoors under the preset first relative humidity threshold value, and condensation possibly occurs indoors above the preset first relative humidity threshold value, so that the temperature of the radiation air conditioner is properly increased, and the condensation is avoided;
s3, if the indoor relative humidity is smaller than or equal to a preset first relative humidity threshold value, closing a water mixing valve of the radiation air conditioner, and opening an exhaust valve of the fresh air dehumidifying unit. Indoor humidity arrives under the condition that can not produce the condensation risk, and the exhaust valve of new trend dehumidification unit is opened, and the demand of opening airing exhaust to new trend dehumidification unit is set for according to different occasions.
As an implementation mode, the fresh air dehumidifying unit comprises a return air pipe and an exhaust pipe, wherein the return air valve is arranged in the return air pipe, the exhaust pipe is arranged in the exhaust pipe, the return air pipe is communicated with an outdoor fresh air pipe of the fresh air dehumidifying unit, and indoor air is led into the outdoor fresh air pipe of the fresh air dehumidifying unit; based on the design, the return air in the return air pipe can be guided into the outdoor fresh air pipe of the fresh air dehumidifying unit for reprocessing (such as purifying and dehumidifying), the air with a certain cold source or heat source is reused, and energy for refrigerating or heating the supplied air is saved.
As an implementation mode, the exhaust pipe and the fresh air supplement pipe are internally provided with split heat exchange pipes, and the exhaust pipe and the fresh air supplement pipe are subjected to heat transfer through the split heat exchange pipes; indoor air is discharged to the outside through the exhaust pipe, and the split type heat exchange tube is arranged on the exhaust pipe and the fresh air supplement tube, so that a cold source or a heat source of the exhaust pipe can be transmitted to the fresh air supplement tube, temperature of supplied air is adjusted, and energy is saved.
As one possible embodiment, the radiant air conditioner adjusts the indoor temperature to a set temperature, including:
the radiation air conditioner operates, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold value;
when the radiation air conditioner is used for refrigeration, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced; the temperature range threshold value is generally 1-3, the radiation air conditioner is used for refrigerating, the indoor temperature is higher than the set temperature at the beginning, when the indoor temperature is close to the set temperature, such as the difference is 1-3 ℃, the opening degree of a water supply valve of the radiation air conditioner is gradually reduced, so that the phenomenon that the indoor temperature exceeds the set temperature due to the delay of the radiation cooling system and the comfort is influenced is avoided.
Similarly, when the radiant air conditioner is used for heating and the indoor temperature is greater than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiant air conditioner is reduced.
Referring to fig. 3, a fresh air radiation cooling and heating control system includes: the indoor radiation air conditioner, the fresh air dehumidifying unit, the radiation air conditioner starting adjusting module 10, the fresh air dehumidifying unit starting adjusting module 20 and the condensation removing module 30 are arranged;
the radiation air conditioner starting and adjusting module 10 is used for starting the radiation air conditioner, calculating the temperature difference between a radiation plate and the indoor dew point temperature, and adjusting the opening degree of a water supply valve of the radiation air conditioner according to the temperature difference, wherein if the temperature difference is large, the opening degree of the water supply valve of the radiation air conditioner is large, and if the temperature difference is small, the opening degree of the water supply valve of the radiation air conditioner is small;
the fresh air dehumidifying unit starting adjusting module 20 is used for synchronously starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, calculating the humidity content difference between the outdoor humidity content and the indoor set humidity content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the humidity content difference, wherein the water supply difference is large, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is large, and if the humidity content difference is small, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is small;
the condensation removing module 30 is used for opening and/or increasing a water mixing valve of the radiation air conditioner and increasing the temperature of the radiation air conditioner if the indoor relative humidity is greater than a preset first relative humidity threshold value;
the radiant air conditioner is used to adjust the indoor temperature to a set temperature.
As an embodiment, the dew-removing module 30 includes a first adjusting unit 31, a second adjusting unit 32, and a third adjusting unit 33;
the first adjusting unit 31 is configured to, if the indoor relative humidity is greater than the preset second relative humidity threshold, adjust the opening of the water mixing valve of the radiant air conditioner to full open, record an opening value a of a return air valve of the fresh air dehumidifying unit, and adjust the opening of the return air valve of the fresh air dehumidifying unit to full open until the indoor relative humidity is less than or equal to the preset second relative humidity threshold;
the second adjusting unit 32 is configured to adjust an opening degree of a water mixing valve of the radiation air conditioner according to a difference between an indoor dew point temperature and a lowest temperature of the radiation plate and adjust an opening degree of a return air valve of the fresh air dehumidifying unit to an opening degree value a until the indoor relative humidity is less than or equal to the preset first relative humidity threshold value if the indoor relative humidity is greater than the preset first relative humidity threshold value and is less than or equal to the preset second relative humidity threshold value;
and the third adjusting unit 33 is used for closing the water mixing valve of the radiation air conditioner and opening the exhaust valve of the fresh air dehumidifying unit if the indoor relative humidity is less than or equal to a preset first relative humidity threshold value.
As an implementation mode, the fresh air dehumidifying unit comprises a return air pipe and an exhaust pipe, wherein the return air valve is arranged in the return air pipe, the exhaust pipe is arranged in the exhaust pipe, the return air pipe is communicated with an outdoor fresh air pipe of the fresh air dehumidifying unit, and indoor air is led into the outdoor fresh air pipe of the fresh air dehumidifying unit.
As an implementation mode, the exhaust pipe and the fresh air supplement pipe are internally provided with split heat exchange pipes, and the exhaust pipe and the fresh air supplement pipe are subjected to heat transfer through the split heat exchange pipes.
As one possible embodiment, a radiant air conditioner for adjusting indoor temperature to a set temperature includes:
the radiation air conditioner operates, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold value;
when the radiation air conditioner is used for refrigeration, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced;
when the radiation air conditioner is used for heating, and the indoor temperature is more than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiation air conditioner is reduced.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A fresh air radiation cooling and heating control method is characterized by comprising the following steps: a radiation air conditioner and a fresh air dehumidification unit are arranged indoors,
starting the radiation air conditioner, calculating the temperature difference between a radiation plate and the indoor dew point temperature, and adjusting the opening of a water supply valve of the radiation air conditioner according to the temperature difference, wherein if the temperature difference is large, the opening of the water supply valve of the radiation air conditioner is large, and if the temperature difference is small, the opening of the water supply valve of the radiation air conditioner is small;
synchronously starting the fresh air dehumidifier unit, opening an air supply valve and an air return valve of the fresh air dehumidifier unit, closing an exhaust valve of the fresh air dehumidifier unit, calculating the humidity content difference between an outdoor humidity content and an indoor set humidity content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifier unit according to the humidity content difference, wherein if the humidity content difference is large, the opening of the water supply valve of the surface cooler of the fresh air dehumidifier unit is large, and if the humidity content difference is small, the opening of the water supply valve of the surface cooler of the fresh air dehumidifier unit is small;
if the indoor relative humidity is larger than a preset first relative humidity threshold value, a water mixing valve of the radiation air conditioner is opened and/or increased, and the temperature of the radiation air conditioner is increased;
the radiant air conditioner adjusts an indoor temperature to a set temperature.
2. A fresh air radiation cooling and heating control method according to claim 1, wherein if the indoor relative humidity is greater than a preset first relative humidity threshold, the water mixing valve of the radiation air conditioner is opened and/or increased to increase the temperature of the radiation air conditioner, and the method comprises:
s1, if the indoor relative humidity is larger than a preset second relative humidity threshold value, adjusting the opening of a water mixing valve of the radiant air conditioner to be fully opened, recording the opening value A of a return air valve of the fresh air dehumidifying unit, and adjusting the opening of the return air valve of the fresh air dehumidifying unit to be fully opened until the indoor relative humidity is smaller than or equal to the preset second relative humidity threshold value;
s2, if the indoor relative humidity is larger than a preset first relative humidity threshold value and smaller than or equal to a preset second relative humidity threshold value, adjusting the opening of a water mixing valve of the radiation air conditioner according to the difference value between the indoor dew point temperature and the lowest temperature of the radiation plate, and adjusting the opening of an air return valve of the fresh air dehumidification unit to be the opening value A until the indoor relative humidity is smaller than or equal to the preset first relative humidity threshold value;
and S3, if the indoor relative humidity is less than or equal to a preset first relative humidity threshold value, closing a water mixing valve of the radiation air conditioner, and opening an exhaust valve of the fresh air dehumidification unit.
3. A fresh air radiation cooling and heating control method according to claim 1, wherein the fresh air dehumidifier unit includes a return duct and an exhaust duct, the return duct is disposed in the return duct, the exhaust duct is disposed in the exhaust duct, and the return duct is communicated with the outdoor fresh air duct of the fresh air dehumidifier unit to guide indoor air into the outdoor fresh air duct of the fresh air dehumidifier unit.
4. The fresh air radiation cooling and heating control method according to claim 3, wherein a split heat exchange tube is arranged in the exhaust duct and the fresh air supplement duct, and the exhaust duct and the fresh air supplement duct are in heat transfer through the split heat exchange tube.
5. The fresh air radiation cooling and heating control method according to claim 1, wherein the radiation air conditioner adjusts the indoor temperature to a set temperature, and comprises:
the radiant air conditioner is operated, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold;
when the radiation air conditioner is used for cooling, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced;
when the radiation air conditioner is used for heating, and the indoor temperature is larger than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiation air conditioner is reduced.
6. A fresh air radiation cooling and heating control system is characterized by comprising: the indoor set radiation air conditioner, fresh air dehumidification unit, radiation air conditioner start adjusting module, fresh air dehumidification unit start adjusting module and condensation removing module;
the radiation air conditioner starts the regulation module for start the radiation air conditioner calculates the difference in temperature of radiation board and indoor dew point temperature, according to the size of difference in temperature is adjusted the aperture of the feed water valve of radiation air conditioner, if the difference in temperature is big, then the aperture of the feed water valve of radiation air conditioner is big, if the difference in temperature is little, then the aperture of the feed water valve of radiation air conditioner is little
The fresh air dehumidifying unit starting adjusting module is used for synchronously starting the fresh air dehumidifying unit, opening an air supply valve and an air return valve of the fresh air dehumidifying unit, closing an exhaust valve of the fresh air dehumidifying unit, calculating a humidity content difference between an outdoor humidity content and an indoor set humidity content, and adjusting the opening of a water supply valve of a surface cooler of the fresh air dehumidifying unit according to the humidity content difference, wherein if the humidity content difference is large, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is large, and if the humidity content difference is small, the opening of the water supply valve of the surface cooler of the fresh air dehumidifying unit is small;
the condensation removing module is used for opening and/or increasing a water mixing valve of the radiation air conditioner and improving the temperature of the radiation air conditioner if the indoor relative humidity is larger than a preset first relative humidity threshold value;
the radiation air conditioner is used for adjusting the indoor temperature to a set temperature.
7. The fresh air radiation cooling and heating control system according to claim 6, wherein the condensation removing module comprises a first adjusting unit, a second adjusting unit and a third adjusting unit;
the first adjusting unit is used for adjusting the opening degree of a water mixing valve of the radiation air conditioner to be fully opened if the indoor relative humidity is larger than a preset second relative humidity threshold value, recording the opening degree value A of an air return valve of the fresh air dehumidifying unit, and adjusting the opening degree of the air return valve of the fresh air dehumidifying unit to be fully opened until the indoor relative humidity is smaller than or equal to the preset second relative humidity threshold value;
the second adjusting unit is configured to adjust an opening degree of a water mixing valve of the radiation air conditioner according to a difference between the indoor dew point temperature and the lowest temperature of the radiation plate and adjust an opening degree of an air return valve of the fresh air dehumidifier unit to the opening degree value a until the indoor relative humidity is less than or equal to a preset first relative humidity threshold value if the indoor relative humidity is greater than the preset first relative humidity threshold value and is less than or equal to a preset second relative humidity threshold value;
and the third adjusting unit is used for closing the water mixing valve of the radiation air conditioner and opening the exhaust valve of the fresh air dehumidifying unit if the indoor relative humidity is less than or equal to a preset first relative humidity threshold value.
8. The fresh air radiation cooling and heating control system according to claim 6, wherein the fresh air dehumidifier unit comprises a return air duct and an exhaust duct, the return air valve is disposed in the return air duct, the exhaust duct is disposed in the exhaust duct, and the return air duct is communicated with an outdoor fresh air duct of the fresh air dehumidifier unit to guide indoor air into the outdoor fresh air duct of the fresh air dehumidifier unit.
9. A fresh air radiation cooling and heating control system according to claim 8, wherein a split heat exchange tube is arranged in the exhaust duct and the fresh air supplement tube, and the exhaust duct and the fresh air supplement tube are in heat transfer through the split heat exchange tube.
10. The fresh air radiation cooling and heating control system according to claim 6, wherein the radiation air conditioner is used for adjusting the indoor temperature to a set temperature, and comprises:
the radiation air conditioner operates, and the indoor temperature is compared with the sum of the set temperature and the temperature range threshold value;
when the radiation air conditioner is used for cooling, and the indoor temperature is less than or equal to the sum of the set temperature and the temperature range threshold value, the opening degree of a water supply valve of the radiation air conditioner is reduced;
when the radiation air conditioner is used for heating, and the indoor temperature is larger than or equal to the difference between the set temperature and the temperature range threshold value, the opening degree of the water supply valve of the radiation air conditioner is reduced.
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Effective date of registration: 20240117 Address after: 214000 building 30, HUanpu Industrial Park, No. 15, Hanjiang Road, Xinwu District, Wuxi City, Jiangsu Province Patentee after: WUXI FRESHAIR AQ TECHNOLOGY Co.,Ltd. Address before: 2nd and 3rd Floor, Unit 2, Building 2, Foshan Anjie Health Industrial Park, No. 27, Hongling 3rd Road, Shishan Town, Nanhai District, Foshan City, Guangdong Province, 528200 Patentee before: Guangdong Huyan feilan Technology Co.,Ltd. |