CN117704540A - Radiation end system control device matched with chilled beam and method thereof - Google Patents
Radiation end system control device matched with chilled beam and method thereof Download PDFInfo
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- CN117704540A CN117704540A CN202410159738.6A CN202410159738A CN117704540A CN 117704540 A CN117704540 A CN 117704540A CN 202410159738 A CN202410159738 A CN 202410159738A CN 117704540 A CN117704540 A CN 117704540A
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- 230000005855 radiation Effects 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005057 refrigeration Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 23
- 238000005265 energy consumption Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F5/0092—Systems using radiation from walls or panels ceilings, e.g. cool ceilings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a radiation end system control device matched with a chilled beam and a method thereof, and the radiation end system control device comprises a radiation loop, wherein the radiation loop comprises an air handling unit, the chilled beam, a radiation ceiling module pipe network and a return air inlet, the air handling unit, the chilled beam and the radiation ceiling form an air supply end in the radiation loop, and the return air inlet forms a return air end in the radiation loop, and the radiation end system control device relates to the technical field of radiation refrigeration. In the method, a plurality of groups of chilled beams, radiation suspended ceilings, air return openings and target rooms which are configured in a complete set share one air treatment unit, and can operate various working conditions and starting modes, and under the full fresh air working condition, primary air return is zero, the air treatment unit only solves the new wind-damp load according to the outdoor working condition, and the wet load of each tail room is solved by the indoor chilled beams; the cold and heat quantity is mainly based on the tail end of the radiation suspended ceiling and assisted by the cold beam, so that sensible heat load of each room is processed; the system is simple and reliable, can meet the matching compatibility condition of the tail ends of different working conditions, and has higher energy efficiency.
Description
Technical Field
The invention relates to the technical field of radiation refrigeration, in particular to a radiation end system control device matched with a chilled beam and a method thereof.
Background
The chilled beam is used as a novel air conditioner tail end, so that the problem of excessive refrigeration or heating of a traditional air conditioning system can be effectively avoided, the waste of energy sources is reduced, and meanwhile, the comfort of personnel is improved. However, because the air supply amount of the chilled beam system is smaller, a plurality of chilled beams are required to meet the cooling or heating requirements for most spaces, and in practical application, the chilled beams are mostly used together with other air conditioning terminals.
The radiation suspended ceiling is used for refrigerating and heating, and heat transfer is carried out in a radiation mode, so that the radiation suspended ceiling is closer to a natural heat dissipation mode of a human body, the influence of air flow on the human body can be reduced, drying and uncomfortable feeling are avoided, higher comfort is brought, and the use amount is increased year by year in recent years; however, humidity treatment is always an important point of radiation refrigeration, one air treatment unit is often connected with the tail ends of a plurality of rooms, the humidity working conditions of different rooms are matched through the air conditioning treatment unit, the rooms with small humidity load are often treated with maximum humidity load, and the running efficiency of the radiation refrigeration system is directly affected in order to reduce the temperature difference of air supply and bring about energy loss of cold and heat offset.
The patent application with the publication number of CN207849571U discloses a radiation metal ceiling central air conditioner end system, and the energy supply device, energy supply pipeline and the guiding device of this patent are all installed between metal ceiling device and building structure device, energy supply pipeline is arranged in sending cold and hot water to the energy supply device, the energy supply device is arranged in heating or cooling the air in the furred ceiling, the guiding device is arranged in with heating or refrigerated air reposition of redundant personnel and evenly send to the furred ceiling space, and through the radiation of metal ceiling device and conduction to indoor behind the reposition of redundant personnel of guiding device, possess indoor temperature even and indoor no bloodness sense's advantage.
However, in the practical use process, the patent only realizes the advantages of weak indoor air convection and no blowing sense in use through the common coanda effect, and the patent selects single working condition in the use process and has higher energy consumption.
Therefore, the patent application with the publication number of CN213453936U discloses an air conditioning system, and the patent avoids blocking the circulation of a waterway between the radiation tail end and the water conservancy module due to the excessively low air temperature in winter by arranging the radiation tail end and the water conservancy module indoors, so that the reliability of use is improved, and the outer machine can simultaneously supply a first working condition refrigerant and a second working condition refrigerant.
However, the patent lacks air flow return structure and arrangement in the using process, so that the energy consumption of the two working conditions is still high, the problem of single operation working condition of the radiation tail end is solved, but the problem of high energy consumption is still not solved, the improvement has defects, and the progress is not thorough.
Disclosure of Invention
The invention aims to provide a radiation end system control device matched with a chilled beam and a method thereof, which utilize the chilled beam and the radiation end device to work in a matched mode and run under multiple working conditions, solve the defect of high energy consumption operation of a single working condition of the radiation end device, improve the problem of condensation on a plate surface caused by high-humidity refrigeration working conditions in the multiple working condition operation mode, and ensure the normal use of equipment.
In order to achieve the above purpose, the present invention provides the following technical solutions: the radiation end device matched with the chilled beam comprises a radiation loop, wherein the radiation loop comprises an air treatment unit, the chilled beam, a radiation ceiling module pipe network and a return air inlet, the air treatment unit, the chilled beam and the radiation ceiling module pipe network form an air supply end in the radiation loop, and the return air inlet forms a return air end in the radiation loop; the radiation target comprises a target room, and the target room is connected between the air supply end and the air return end; the multi-way valve is used for switching the starting mode and the working condition of the radiation loop; the chilled beam, the radiation ceiling module pipe network, the air return opening and the target room are arranged in a plurality of groups in a complete set and are connected into the radiation loop.
The invention also provides a control method for the collocation chilled beam, and is applied to a radiation end device, and mainly comprises the following steps:
A. controlling the multi-way valve to select a radiation loop starting mode;
B. controlling the multi-way valve to select the operation condition of the radiation loop;
C. and starting the radiation loop to drive the working condition to operate.
The working principle of the invention is as follows: in the method, a plurality of groups of chilled beams, a radiation suspended ceiling module pipe network, an air return port and a target room which are configured in a complete set share one air treatment unit (a new fan), multiple working conditions and starting modes can be operated, and under the full fresh air working condition, primary air return is zero, the air treatment unit only solves the new wind-damp load according to the outdoor working condition, and the wet load of each tail room is solved by the indoor chilled beams; the cold and heat quantity is mainly at the tail end of the pipe network of the radiation suspended ceiling module and is assisted by a cold beam, so that sensible heat load of each room is processed; the system is simple and reliable, can meet the matching compatibility condition of the tail ends of different working conditions, and has higher energy efficiency.
Compared with the prior art, the invention has the following other beneficial effects:
as the scheme of the invention: in the air supply end, the chilled beam comprises an air supply pipe, an air valve, an air supply cavity, a jet nozzle, an air mixing duct, an air supply opening and a secondary air return opening which are communicated, wherein the jet nozzle is provided with two groups and is respectively arranged at two ends of one side of the air supply cavity.
As the scheme of the invention: in the air supply end, the chilled beam further comprises a chilled coil, a water pan, a fan and a sealing cover plate, wherein the chilled coil and the water pan are fixedly arranged in the chilled beam, the fan is fixedly arranged with the chilled beam through a fan bracket, the sealing cover plate isolates the chilled beam from a channel of the fan, after the mode II of the chilled beam is switched, the air valve is closed and the fan is started, so that the multi-way valve can operate in a high-humidity refrigeration mode in a storage, and the efficient dehumidification of the indoor circulation is realized.
As still further aspects of the invention: the outside fixed mounting of cold beam has the cold beam decorative board, and the cold beam decorative board can carry out the decoration and the hiding of cold beam, is applicable to the pleasing to the eye demand of target room under domestic environment, the commercial environment.
As still further aspects of the invention: in the multichannel valve, including valve A, valve B, valve C and valve D, valve A, valve B, valve C and valve D supply the radiation loop to switch starting mode and operating mode, through the control of multichannel valve in the waterway system and the cooperation of radiation loop, can realize the switching use of chilled beam mode, conventional refrigeration/heating operating mode, starting operating mode, high wet refrigeration mode operating mode and shut-down operating mode, satisfy the user demand under the different application conditions.
As still further aspects of the invention: said step a comprises a comfort mode and a quick start mode,
the control method of the comfort mode comprises the following steps: the valve A and the valve D are opened, the valve B and the valve C are closed, so that the water supply only supplies cold to the room through the radiation loop, the comfortable mode can reduce the air supply temperature difference while reducing the energy consumption, the temperature change in the room is smooth, and the uncomfortable feeling of abrupt temperature change can be avoided.
The control method of the quick start mode comprises the following steps: and opening the valve A, the valve C and the valve D, closing the valve B, driving the chilled beam to operate with the maximum temperature difference, and opening the cold coil pipe to perform refrigeration and heating in a quick starting mode with the maximum temperature difference so as to accelerate the operation to a target set working condition.
As still further aspects of the invention: the step B comprises a conventional operation working condition, a shutdown working condition, a high-humidity refrigeration working condition and a chilled beam mode, wherein the conventional operation working condition, the shutdown working condition, the high-humidity refrigeration working condition and the chilled beam mode can meet the working under different use requirements, such as the conventional operation working condition can meet the conventional refrigeration/heating requirements, the shutdown working condition can realize the refrigeration and heating requirements within half an hour to one hour after shutdown, the high-humidity refrigeration working condition can meet the requirements of avoiding condensation on a plate surface, the chilled beam mode is convenient to convert, and the chilled beam mode can meet the blowing comfort and the internal circulation dehumidification function.
As still further aspects of the invention: the chilled beam mode comprises a mode one and a mode two, and the control method of the mode one comprises the following steps: the jet nozzle sprays air flow and attracts secondary return air to enter the secondary return air inlet and then to be mixed with fresh air in the air mixing duct, the mixed air is sent into a target room through the air supply inlet, and due to the fact that the air outlet direction of the air supply inlet is inclined, the air supply distance is increased through the coanda effect (the fluid is changed from the original flowing direction to the trend along with the flowing of the surface of a convex object, and when surface friction exists between the fluid and the surface of the object through which the fluid flows, the fluid flows along the surface of the object as long as the curvature is not large), the convection heat exchange coefficient near a radiation plate surface is improved, the divergence degree is large, a non-blowing sense mode is formed, and the use comfort is improved.
The control method of the mode II comprises the following steps: the dew point temperature and the panel temperature at the pipe network of the radiation suspended ceiling module are tested, the air valve is controlled to be closed and the fan is controlled to work under the specified condition, the multi-way valve system is driven to act in a high-humidity refrigeration mode, and the transmission device of the chilled beam is controlled by the controller, so that the internal circulation high-efficiency dehumidification of the target room can be realized.
As still further aspects of the invention: the conventional operation condition control method comprises the following steps: and opening the valve A and the valve B and closing the valve C and the valve D, so that the water supply is sequentially input to a target room through the air treatment unit and the chilled beam, wherein the valve A adjusts the backwater proportion to control the indoor cooling or heating capacity, and the use requirement under the normal condition can be met.
The high-humidity refrigeration condition control method comprises the following steps: and under the quick starting mode, the air valve is closed after the backwater proportion of the valve A is regulated, and the fan is driven to work after the running mode of the chilled beam is switched from the mode I to the mode II, so that the requirements of avoiding condensation on the plate surface and being convenient to switch the mode of the chilled beam can be met.
The shutdown condition control method comprises the following steps: and the valve A and the valve B are opened, the valve C and the valve D are closed, the valve A is switched to a 100% backwater control mode, and the chilled beam is switched to a mode two operation, so that the refrigerating and heating requirements within half an hour to one hour after shutdown can be realized.
Drawings
Fig. 1 is a schematic structural diagram of a circulation loop in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a water path system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a first beam cooling mode according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a second chilled beam mode in an embodiment of the invention.
Fig. 5 is a top view of a chilled beam bottom in a chilled beam mode in accordance with an embodiment of the invention.
Fig. 6 is a top view of the bottom of the chilled beam in the second chilled beam mode in an embodiment of the invention.
FIG. 7 is a flow chart of a method of use in an embodiment of the invention.
In the figure: 1. an air treatment unit; 2. a chilled beam; 3. a radiant ceiling module grid; 4. an air return port; 5. a target room; 10. an air supply pipe; 11. an air valve; 12. an air supply cavity; 13. a jet nozzle; 14. a wind mixing duct; 15. an air supply port; 16. a cold beam veneer; 17. a secondary return air port; 18. a cold coil; 19. a water receiving tray; 20. a fan; 21. a fan bracket; 22. and sealing the cover plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In describing the present invention, it should be noted that the specific meaning of the above terms in the present invention can be understood in detail to those skilled in the art. Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
Referring to fig. 1, 2 and 3, a radiation end device with a chilled beam according to an embodiment of the present invention is also a system according to the present invention, where the radiation end device includes a radiation loop, a radiation target, and a multi-way valve.
The radiation loop comprises an air handling unit 1, a chilled beam 2, a radiation ceiling module pipe network 3 and a return air inlet 4, wherein the air handling unit 1, the chilled beam 2 and the radiation ceiling module pipe network 3 form an air supply end in the radiation loop, and the return air inlet 4 forms a return air end in the radiation loop; the chilled beam 2 comprises an air supply pipe 10, an air valve 11, an air supply cavity 12, a jet nozzle 13, an air mixing duct 14, an air supply opening 15 and a secondary air return opening 17 which are communicated, wherein the jet nozzle 13 is provided with two groups and is respectively arranged at two ends of one side of the air supply cavity 12.
In the air supply end, the chilled beam 2 further comprises a chilled coil 18, a water pan 19, a fan 20 and a sealing cover plate 22, wherein the chilled coil 18 and the water pan 19 are fixedly installed inside the chilled beam 2, the fan 20 is fixedly installed with the chilled beam 2 through a fan bracket 21, and the sealing cover plate 22 isolates the chilled beam 2 from a channel of the fan 20. The outside fixed mounting of chilled beam 2 has chilled beam decorative board 16, and chilled beam decorative board 16 can carry out the decoration and the hiding of chilled beam, is applicable to the pleasing to the eye demand of target room under domestic environment, the commercial environment.
The radiation target comprises a target room 5, and the target room 5 is connected between the air supply end and the air return end;
the multi-way valve is used for switching the starting mode and the working condition of the radiation loop. The chilled beam 2, the radiation ceiling module pipe network 3, the return air inlet 4 and the target room 5 are arranged in a plurality of groups in a complete set and are connected into a radiation loop.
Referring to fig. 1, 2 and 7, the invention further includes a control method of a radiation end device matched with a chilled beam, comprising the following steps:
A. controlling the multi-way valve to select a radiation loop starting mode;
B. controlling the multi-way valve to select the operation condition of the radiation loop;
C. and starting the radiation loop to drive the working condition to operate.
Example 1
Start-up condition adjustment
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, if the comfortable starting condition is to be adjusted, the valves a and D can be opened and the valves B and C can be closed, the cold source waterway system supplies water only through the radiation ceiling module pipe network 3 to provide cold energy to the room, at this time, because the system is just started, the chilled beam 2 is only used for inducing secondary return air, that is, the jet nozzle 13 attracts the secondary return air in the room to enter the secondary return air port 17 under the starting condition, then the secondary return air and fresh air are mixed in the air mixing duct 14 and enter the room together through the air supply port 15, the convection heat exchange coefficient near the radiation panel is effectively improved by the air flow passing through the air supply port 15 due to the inclined structure, and the divergence degree is large, so as to form a non-blowing feeling mode, the comfort is good, the direct air supply heating module after the starting can be replaced, the energy consumption loss caused by cold and hot offset in the target room 5 is avoided, the temperature drop (refrigerating condition) or rising (heating condition) curve is smooth while the temperature shock in the room is reduced, and the uncomfortable feeling of temperature change is avoided.
Referring to fig. 1 and 2, if the fast start mode is to be adjusted, the valves a, C and D are opened and the valve B is closed under the requirement of the fast cooling and heating condition, and the cooling coil 18 is opened with the maximum temperature difference to perform cooling/heating while the radiation ceiling module pipe network 3 is operated to cool/heat, and the cold heat source waterway system and the radiation ceiling module pipe network 3 are all in rated power operation in the process, so that the operation can be accelerated and the operation can be performed for the fastest time to the target set condition.
Example two
Conventional refrigeration/heating condition adjustment
Referring to fig. 1 and 2, if the operation of the device is to be realized in a normal state, the valves a and B may be opened first and the valves C and D may be closed, so that the water supply of the cold and hot source waterway system sequentially passes through the radiant ceiling module pipe network 3 and the cold coil 18.
Example III
Cold beam mode adjustment
Referring to fig. 1-6, if the mode one adjustment is to be performed (the adjustment principle is similar to the comfortable start-up condition), that is, the jet nozzle 13 attracts the indoor secondary return air to enter the secondary return air port 17 under the start-up condition, then the secondary return air is mixed with the fresh air in the air mixing duct 14 and enters the room through the air supply port 15, the convection heat exchange coefficient near the radiation plate surface can be effectively improved due to the inclined structure of the air flow passing through the air supply port 15 in the process, the divergence degree is large, a non-blowing-feeling mode is formed, the comfort is good, the direct air supply heating module after the start-up can be replaced in the process, the energy consumption loss caused by cold and hot offset in the target room is avoided, the air supply temperature difference is reduced, meanwhile, the temperature drop (refrigeration condition) or rising (heating condition) curve in the room is smooth, the uncomfortable feeling of temperature shock is avoided, and the comfort is improved.
Referring to fig. 1-6, if a mode two adjustment is to be performed, a monitoring sensor may be installed at the cold Liang Zhongan to measure the temperature, specifically, the dew point temperature near the indoor ceiling surface measured by the sensorAnd radiant panel temperature->Then the measured temperature and the preset temperature allowance in the comparison memory are added>Comparison is made if +.>The controller can control the transmission device in the chilled beam 2, so that the fan bracket 21 and the sealing cover plate 22 are turned downwards and are covered with the secondary return air port 17, at the moment, the air valve 11 can be closed, the fan 20 is started, the water valve acts in a high-humidity refrigeration mode in the storage, and the indoor circulation and high-efficiency dehumidification can be realized.
Example IV
High humidity refrigeration condition adjustment
Referring to fig. 1-6 and embodiment three, if the high-humidity refrigeration condition is to be adjusted, the waterway control of the high-humidity refrigeration condition adjustment is the same as the quick start condition, specifically, the valve a, the valve C and the valve D are opened and the valve B is closed, and then the dew point temperature near the indoor ceiling surface is monitoredAnd radiant panel temperature->To avoid->(condensation on the surface of the plate) is caused by adjusting the backwater proportion of the valve A and improving the water supply temperature of the radiation suspended ceiling module pipe network 3 so as to ensure that(ζ is the condensation temperature margin of the radiation plate surface, is a preset value, and is 0 to 2 ℃), thereby avoiding +.>The plate surface is exposed. Meanwhile, the cold and hot source waterway system conveys low-temperature water supply and directly leads the water supply to the cold coil 18, then the air valve 11 in the cold beam 2 is closed, the cold beam 2 is switched from the first mode to the second mode, then the fan 20 is started to return air, and the target room 5 is switched from the fresh air working condition to the internal circulation dehumidification working condition. And, preset time->Continuously operating the high humidity cooling mode (stored in the memory of the radiation end system) until +.>After that, the mode is kept running for a preset time +.>Thereafter, the chilled beam 2 is switched to mode one, while the damper 11 is opened to switch to the normal cooling mode.
Example five
Shutdown condition adjustment
Referring to fig. 1 and 2, if the shutdown condition is to be adjusted, since the radiation cooling and heating system has large cooling/heating capacity, a large amount of heat and cold remains after the system stops running, so that a large amount of energy waste is formed, which limits the popularization of the system in the civil market with frequent start and stop.
Therefore, under the shutdown condition of this embodiment, the valves a and B of the waterway system are opened, the valves C and D are closed, and at the same time, the valve a is switched to 100% backwater control, and the chilled beam 2 is switched to mode two operation, at this time, the waterway system of the cold source no longer provides cold and heat to the room (i.e. the conventional refrigeration/heating condition is automatically stopped), at this time, the rotation speed of the fan 20 in the chilled beam 2 is gradually increased by monitoring the change of indoor temperature and humidity, so that the chilled beam 2 releases cold and is in an ascending trend in a short time to compensate for the cold reduction part of the system at the radiation end, so that the chilled beam 2 releases the cold and heat capacity of the system under different laying areas and different cold configuration, and the refrigeration and heating requirements within 0.5 to 1.5h after shutdown are realized.
Example six
Adjustment of self-learning mode
Self-learning mode for shutdown mode: because the laying area of the radiation suspended ceilings and the number of the chilled beams 2 are different in different scenes and under different user demands, the system can continuously record the indoor temperature change data along with time under each actual shutdown working condition at the initial stage of use, and simultaneously records the outdoor air temperature and humidity and the supply and return water temperature and flow (periodically monitors the temperature and humidity and time data and stores the temperature and time data in a memory, and at least meets the data storage of one year), the frequency change curve of the fan 20 in the chilled beams 2 is continuously optimized, and the better continuous-extension refrigerating and heating effects are realized.
In the subsequent operation, the system can continuously predict the indoor temperature holding time after shutdown according to the comparison of the current outdoor environment parameters and the stored historical data (shutdown working condition operation parameters of the system under different outdoor working conditions in the whole year) in the system memory, and display the indoor temperature holding time on the display panel of the air conditioning system in real time for reference before shutdown of a customer, and under the condition of meeting the use requirement, the residual cold and heat quantity of the system are utilized to the greatest extent, and the operation energy efficiency of the whole-period system is improved.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The radiation end device matched with the chilled beam is characterized by comprising a radiation loop, wherein the radiation loop comprises an air treatment unit (1), the chilled beam (2), a radiation ceiling module pipe network (3) and an air return port (4), the air treatment unit (1), the chilled beam (2) and the radiation ceiling module pipe network (3) form an air supply end in the radiation loop, and the air return port (4) forms an air return end in the radiation loop;
the radiation target comprises a target room (5), and the target room (5) is connected between the air supply end and the air return end; and
a multi-way valve for the radiation loop to switch the starting mode and the working condition;
the chilled beam (2), the radiation suspended ceiling module pipe network (3), the air return port (4) and the target room (5) are arranged in a plurality of groups in a complete set and are connected into the radiation loop;
in the air supply end, the chilled beam (2) comprises an air supply pipe (10), an air valve (11), an air supply cavity (12), a jet nozzle (13), an air mixing duct (14), an air supply opening (15) and a secondary air return opening (17) which are communicated, wherein the jet nozzle (13) is provided with two groups of two ends which are arranged at one side of the air supply cavity (12) in a split manner;
in the air feed end, chilled beam (2) still includes cold coil pipe (18), water collector (19), fan (20) and sealed apron (22), chilled coil pipe (18) and water collector (19) fixed mounting are in the inside of chilled beam (2), fan (20) pass through fan support (21) and chilled beam (2) fixed mounting, sealed apron (22) keep apart chilled beam (2) and the passageway of fan (20).
2. The radiation end device matched with the chilled beam as claimed in claim 1, wherein the chilled beam (2) is fixedly provided with a chilled beam veneer (16) at the outer part.
3. The radiation end device matched with the chilled beam according to claim 2, wherein the multi-way valve comprises a valve A, a valve B, a valve C and a valve D, and the valve A, the valve B, the valve C and the valve D are used for switching the radiation loop to be started and operated.
4. A control method for a cooling beam, applied to the radiation end device for a cooling beam according to claim 3, comprising the following steps:
A. controlling the multi-way valve to select a radiation loop starting mode;
B. controlling the multi-way valve to select the operation condition of the radiation loop;
C. and starting the radiation loop to drive the working condition to operate.
5. The method according to claim 4, wherein the step A includes a comfort mode and a quick start mode,
the control method of the comfort mode comprises the following steps: opening valves a and D and closing valves B and C so that the water supply supplies cold to the room only through the radiation circuit;
the control method of the quick start mode comprises the following steps: valve A, valve C and valve D are opened and valve B is closed to drive the chilled beam (2) to operate with maximum temperature difference.
6. The method according to claim 5, wherein the step B includes a normal operation mode, a shutdown mode, a high-humidity refrigeration mode, and a chilled beam mode.
7. The method of claim 6, wherein the chilled beam modes include a first mode and a second mode,
the control method of the mode one comprises the following steps: the jet nozzle (13) sprays air flow and attracts secondary return air to enter the secondary return air wind inlet (17), then the secondary return air is mixed with fresh air in the air mixing duct (14), and the mixed fresh air is sent into the target room (5) through the air supply outlet (15);
the control method of the mode II comprises the following steps: and testing the dew point temperature and the panel temperature at the radiant ceiling module pipeline network (3), controlling the air valve (11) to be closed and the fan (20) to work under specified conditions, and driving the multi-way valve system to act in a high-humidity refrigeration mode.
8. The method for controlling a chilled beam according to claim 7, wherein,
the conventional operation condition control method comprises the following steps: opening the valve A and the valve B and closing the valve C and the valve D, so that the water supply is sequentially input into a target room (5) through the air treatment unit (1) and the chilled beam (2), wherein the valve A adjusts the backwater proportion to control indoor cooling or heat supply;
the high-humidity refrigeration condition control method comprises the following steps: the air valve (11) is closed after the backwater proportion of the valve A is regulated in a quick starting mode, and the fan (20) is driven to work after the operation mode of the chilled beam (2) is switched from the mode I to the mode II;
the shutdown condition control method comprises the following steps: and opening the valve A and the valve B, closing the valve C and the valve D, switching the valve A into a 100% backwater control mode, and switching the chilled beam into a mode two.
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| CN117704540B (en) | 2024-05-24 |
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