CN105258246A - Central air-conditioning system and control method thereof - Google Patents
Central air-conditioning system and control method thereof Download PDFInfo
- Publication number
- CN105258246A CN105258246A CN201510654579.8A CN201510654579A CN105258246A CN 105258246 A CN105258246 A CN 105258246A CN 201510654579 A CN201510654579 A CN 201510654579A CN 105258246 A CN105258246 A CN 105258246A
- Authority
- CN
- China
- Prior art keywords
- chilled water
- fan coil
- water
- units
- fresh air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004378 air conditioning Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 172
- 238000010438 heat treatment Methods 0.000 claims description 6
- 241000009298 Trigla lyra Species 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
-
- 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
-
- 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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a central air-conditioning system and a control method thereof. The central air-conditioning system comprises a fresh air unit (1), a fan coil (2) and a water chilling unit (3) which are sequentially connected in series, and chilled water flows back to the water chilling unit (3) after flowing through the fresh air unit (1) and the fan coil (2) from the water chilling unit (3). According to the central air-conditioning system, the power consumption of the water chilling unit can be effectively reduced, and energy is saved.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of central air conditioner system and control method thereof.
Background technology
Conventional central air-conditioning system is made up of handpiece Water Chilling Units, chilled water system, cooling water system and end.Along with the lifting of handpiece Water Chilling Units efficiency, handpiece Water Chilling Units energy consumption proportion is more and more less, and its energy-saving potential also all becomes little day.On the contrary, pump energy consumption proportion rises day by day, and energy saving requirement also increases day by day.Traditional air-conditioning system chilled water for backwater temperature difference usually at 1 ~ 4.4 DEG C, also exist " the little temperature difference syndrome of large discharge ", the power consumption of handpiece Water Chilling Units increased, causes energy waste.
Summary of the invention
A kind of central air conditioner system and control method thereof are provided in the embodiment of the present invention, effectively can reduce the power consumption of handpiece Water Chilling Units, economize energy.
For achieving the above object, the embodiment of the present invention provides a kind of central air conditioner system, comprises the Fresh air handling units, fan coil and the handpiece Water Chilling Units that are connected in series successively, and chilled water flows back into handpiece Water Chilling Units after handpiece Water Chilling Units flows through Fresh air handling units and fan coil.
As preferably, central air conditioner system also comprises bypass line, and the outlet of bypass line is connected to the entrance of fan coil, and the entrance of bypass line is connected to the outlet of handpiece Water Chilling Units, and bypass line is provided with by-passing valve.
As preferably, central air conditioner system also comprises water knockout drum, and water knockout drum is arranged on the outlet of handpiece Water Chilling Units, and the entrance of bypass line and Fresh air handling units is all connected to the outlet of water knockout drum.
As preferably, central air conditioner system also comprises water collector and chilled water pump, and water collector and chilled water pump are serially connected between fan coil and handpiece Water Chilling Units successively along the flow direction of chilled water.
According to a further aspect in the invention, provide a kind of control method of central air conditioner system, comprising: the chilled water in handpiece Water Chilling Units is delivered to Fresh air handling units; Fresh air handling units heats up to chilled water, and the chilled water after heating up is delivered to fan coil; Fan coil continues to heat up to the chilled water that Fresh air handling units is carried, and the chilled water after heating up is transmitted back to handpiece Water Chilling Units.
As preferably, control method also comprises: between the outlet and the entrance of fan coil of handpiece Water Chilling Units, arrange bypass line, bypass line is arranged the by-passing valve of control piper break-make.
As preferably, the chilled water temperature that handpiece Water Chilling Units exports is T1, and the chilled water temperature that Fresh air handling units exports is T2, and the chilled water temperature that fan coil exports is T3, wherein 4 DEG C of < T1≤7 DEG C; 3 DEG C≤T2-T1≤7 DEG C; 3 DEG C≤T3-T2≤7 DEG C; 6 DEG C≤T3-T1≤10 DEG C.
As preferably, during chilled water flow quantity not sufficient in fan coil, open by-passing valve, chilled water is entered in fan coil from Fresh air handling units and bypass line simultaneously.
As preferably, when indoor humidity load increases, open by-passing valve, chilled water is entered in fan coil from Fresh air handling units and bypass line simultaneously.
Apply technical scheme of the present invention, central air conditioner system comprises the Fresh air handling units, fan coil and the handpiece Water Chilling Units that are connected in series successively, and chilled water flows back into handpiece Water Chilling Units after handpiece Water Chilling Units flows through Fresh air handling units and fan coil.Handpiece Water Chilling Units is back to after flowing through Fresh air handling units and fan coil successively by making chilled water, can progressively heat to the chilled water temperature that handpiece Water Chilling Units flows out, the temperature making finally to be back between the chilled water of handpiece Water Chilling Units and the chilled water flowed out from handpiece Water Chilling Units has larger temperature difference, thus the flow of chilled water can be reduced, reduce the power consumption of chilled water pump and handpiece Water Chilling Units, improve the efficiency of central air-conditioning.
Accompanying drawing explanation
Fig. 1 is the structure chart of the central air conditioner system of the embodiment of the present invention
Fig. 2 is the control method flow chart of the central air conditioner system of the embodiment of the present invention.
Description of reference numerals: 1, Fresh air handling units; 2, fan coil; 3, handpiece Water Chilling Units; 4, bypass line; 5, by-passing valve; 6, water knockout drum; 7, water collector; 8, chilled water pump.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
In figure, the direction of arrow is chilled water flow direction.
Shown in Figure 1, according to embodiments of the invention, central air conditioner system comprises the Fresh air handling units 1, fan coil 2 and the handpiece Water Chilling Units 3 that are connected in series successively, and chilled water flows back into handpiece Water Chilling Units 3 after handpiece Water Chilling Units 3 flows through Fresh air handling units 1 and fan coil 2.
Handpiece Water Chilling Units 3 is back to after flowing through Fresh air handling units 1 and fan coil 2 successively by making chilled water, can progressively heat to the chilled water temperature that handpiece Water Chilling Units 3 flows out, the temperature making finally to be back between the chilled water of handpiece Water Chilling Units 3 and the chilled water flowed out from handpiece Water Chilling Units 3 has larger temperature difference, thus the flow of chilled water can be reduced, reduce the power consumption of chilled water pump 8 and handpiece Water Chilling Units 3, improve the efficiency of central air-conditioning.
Because chilled water is after handpiece Water Chilling Units 3 outflow, there is lower temperature, directly entering into after in Fresh air handling units 1, cool-down dehumidification process can be carried out to the new wind of humidity, after carrying out cool-down dehumidification process to the new wind of humidity, the chilled water after intensification enters in fan coil 2 again and carries out cool-down dehumidification process to indoor return air.After flowing out from handpiece Water Chilling Units 3 relative to chilled water, be introduced into the scheme that fan coil 2 then enters Fresh air handling units 1 again, because new wind facies has larger humidity for indoor return air, therefore the scheme of the application can provide the chilled water of low temperature more to the new wind in Fresh air handling units 1, more effectively can ensure the cool-down dehumidification effect to new wind.If chilled water is introduced in fan coil 2, enter in Fresh air handling units 1 again, because chilled water can first heat up through fan coil 2, therefore the chilled water temperature that enters in Fresh air handling units 1 can be caused higher, reduce the cool-down dehumidification effect to new wind, and then adverse effect is caused to the efficiency of whole central air-conditioning.
Central air conditioner system also comprises bypass line 4, and the outlet of bypass line 4 is connected to the entrance of fan coil 2, and the entrance of bypass line 4 is connected to the outlet of handpiece Water Chilling Units 3, bypass line 4 is provided with by-passing valve 5.By-passing valve 5 can control the break-make of bypass line 4, thus determine whether that according to actual conditions partial freeze water handpiece Water Chilling Units 3 flowed out directly is delivered in fan coil 2 without Fresh air handling units 1, make the control of bypass line 4 more flexible, central air-conditioning can be made to obtain higher Energy Efficiency Ratio.
Due in central air conditioner system running, needed for Fresh air handling units 1 and fan coil 2, chilled-water flow is inequal constantly, therefore bypass line 4 is set, the lower chilled water bypass of the temperature that just a part can be flowed out in handpiece Water Chilling Units 3, to the pipe inlet of fan coil 2, meets the demands to maintain whole water system cold water flow.
When indoor humidity load increases, also by a part from the lower chilled water bypass of the temperature flowed out in handpiece Water Chilling Units 3 to the pipe inlet of fan coil 2, the inflow temperature of the chilled water of fan coil 2 can be reduced, improves wet-out property.
Central air conditioner system also comprises water knockout drum 6, and water knockout drum 6 is arranged on the outlet of handpiece Water Chilling Units 3, and the entrance of bypass line 4 and Fresh air handling units 1 is all connected to the outlet of water knockout drum 6.
Central air conditioner system also comprises water collector 7 and chilled water pump 8, and water collector 7 and chilled water pump 8 are serially connected between fan coil 2 and handpiece Water Chilling Units 3 successively along the flow direction of chilled water.
In conjunction with see Fig. 2, according to embodiments of the invention, the control method of central air conditioner system comprises: the chilled water in handpiece Water Chilling Units 3 is delivered to Fresh air handling units 1; Fresh air handling units 1 pair of chilled water heats up, and the chilled water after heating up is delivered to fan coil 2; The chilled water that fan coil 2 pairs of Fresh air handling units 1 are carried continues to heat up, and the chilled water after heating up is transmitted back to handpiece Water Chilling Units 3.
First the chilled water of handpiece Water Chilling Units 3 is delivered to Fresh air handling units 1, lower temperature can be provided for Fresh air handling units 1, improve the cool-down dehumidification effect to new wind, the chilled water temperature exported from Fresh air handling units 1 raises, be transported in fan coil 2, cool-down dehumidification is carried out to indoor return air, chilled water after heat exchange flows out in fan coil 2, and flow back into handpiece Water Chilling Units 3, the chilled water supply and return water temperature difference of handpiece Water Chilling Units 3 both sides is increased, chilled-water flow can be reduced, reduce pump energy consumption, make chilled water supply and return water riser raise simultaneously, promote the evaporating temperature of handpiece Water Chilling Units 3, the power consumption of handpiece Water Chilling Units is declined.
Control method also comprises: between the outlet and the entrance of fan coil 2 of handpiece Water Chilling Units 3, arrange bypass line 4, bypass line 4 is arranged the by-passing valve 5 of control piper break-make.
During chilled water flow quantity not sufficient in fan coil 2, open by-passing valve 5, make chilled water enter in fan coil 2 from Fresh air handling units 1 and bypass line 4 simultaneously, thus directly can supplement chilled water from the exit of handpiece Water Chilling Units 3 in fan coil 2, ensure that the chilled-water flow in fan coil 2 is sufficient, improve the heat exchange efficiency of fan coil 2 and indoor return air.
When indoor humidity load increases, also can open by-passing valve 5, chilled water be entered in fan coil 2 from Fresh air handling units 1 and bypass line 4 simultaneously, thus reduces the chilled water temperature entered in bypass line 4, improve the effect on moisture extraction of fan coil 2 pairs of indoor return air.
In the present embodiment, the chilled water temperature that handpiece Water Chilling Units 3 exports is T1, and the chilled water temperature that Fresh air handling units 1 exports is T2, and the chilled water temperature that fan coil 2 exports is T3, wherein 4 DEG C of < T1≤7 DEG C; 3 DEG C≤T2-T1≤7 DEG C; 3 DEG C≤T3-T2≤7 DEG C; 6 DEG C≤T3-T1≤10 DEG C, thus ensure that the chilled water supply and return water temperature that handpiece Water Chilling Units 3 is imported and exported is within a rational scope, make central air conditioner system can have the efficiency that preferably works.
Certainly, be more than the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art, under the prerequisite not departing from its general principles, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a central air conditioner system, it is characterized in that, comprise the Fresh air handling units (1), fan coil (2) and the handpiece Water Chilling Units (3) that are connected in series successively, chilled water flows back into described handpiece Water Chilling Units (3) after described handpiece Water Chilling Units (3) flows through described Fresh air handling units (1) and described fan coil (2).
2. central air conditioner system according to claim 1, it is characterized in that, described central air conditioner system also comprises bypass line (4), the outlet of described bypass line (4) is connected to the entrance of described fan coil (2), the entrance of described bypass line (4) is connected to the outlet of described handpiece Water Chilling Units (3), and (4) are provided with by-passing valve (5) to described bypass line.
3. central air conditioner system according to claim 2, it is characterized in that, described central air conditioner system also comprises water knockout drum (6), described water knockout drum (6) is arranged on the outlet of described handpiece Water Chilling Units (3), and the entrance of described bypass line (4) and described Fresh air handling units (1) is all connected to the outlet of described water knockout drum (6).
4. central air conditioner system according to claim 1, it is characterized in that, described central air conditioner system also comprises water collector (7) and chilled water pump (8), and described water collector (7) and chilled water pump (8) are serially connected between described fan coil (2) and described handpiece Water Chilling Units (3) successively along the flow direction of described chilled water.
5. a control method for central air conditioner system, is characterized in that, comprising:
Chilled water in handpiece Water Chilling Units (3) is delivered to Fresh air handling units (1);
Fresh air handling units (1) heats up to chilled water, and the chilled water after heating up is delivered to fan coil (2);
Fan coil (2) continues to heat up to the chilled water that Fresh air handling units (1) is carried, and the chilled water after heating up is transmitted back to handpiece Water Chilling Units (3).
6. control method according to claim 5, is characterized in that, described control method also comprises:
Bypass line (4) is set between the outlet and the entrance of fan coil (2) of handpiece Water Chilling Units (3), bypass line (4) is arranged the by-passing valve (5) of control piper break-make.
7. control method according to claim 5, it is characterized in that, the chilled water temperature that handpiece Water Chilling Units (3) exports is T1, the chilled water temperature that Fresh air handling units (1) exports is T2, the chilled water temperature that fan coil (2) exports is T3, wherein 4 DEG C of < T1≤7 DEG C; 3 DEG C≤T2-T1≤7 DEG C; 3 DEG C≤T3-T2≤7 DEG C; 6 DEG C≤T3-T1≤10 DEG C.
8. control method according to claim 6, it is characterized in that, during chilled water flow quantity not sufficient in fan coil (2), open by-passing valve (5), chilled water is entered in fan coil (2) from Fresh air handling units (1) and bypass line (4) simultaneously.
9. control method according to claim 6, it is characterized in that, when indoor humidity load increases, open by-passing valve (5), chilled water is entered in fan coil (2) from Fresh air handling units (1) and bypass line (4) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654579.8A CN105258246A (en) | 2015-10-10 | 2015-10-10 | Central air-conditioning system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654579.8A CN105258246A (en) | 2015-10-10 | 2015-10-10 | Central air-conditioning system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105258246A true CN105258246A (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510654579.8A Pending CN105258246A (en) | 2015-10-10 | 2015-10-10 | Central air-conditioning system and control method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN105258246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839170A (en) * | 2017-03-17 | 2017-06-13 | 中国船舶重工集团公司第七〇四研究所 | Ship medical surgery room air handling system is without solidifying hydrothermal exchange system |
| CN109340933A (en) * | 2018-10-25 | 2019-02-15 | 华南理工大学 | A kind of big temperature difference energy-saving air conditioning system of chilled water and its implementation |
| CN110057064A (en) * | 2019-05-20 | 2019-07-26 | 浙江大冲能源科技有限公司 | A kind of combined air conditioner unit high-efficiency energy-saving control based on single cold source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280657A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Plant Eng & Constr Co Ltd | Air conditioner |
| CN1605809A (en) * | 2004-11-10 | 2005-04-13 | 曹琦 | Energy saving comfortable central air-conditioning system without electric two-way regulating valve |
| CN201331143Y (en) * | 2008-10-10 | 2009-10-21 | 沈致和 | Household central air-conditioning with fresh air function and hot water system |
| CN201421145Y (en) * | 2009-03-04 | 2010-03-10 | 朱玲 | Water pipe system of air conditioner |
| CN201434458Y (en) * | 2008-09-28 | 2010-03-31 | 广州市设计院 | Air conditioning refrigeration system for large temperature difference series connection cascade utilization |
| CN202546975U (en) * | 2012-04-16 | 2012-11-21 | 天津商业大学 | Cooling tower and dry fan coil unit plus fresh air independent dehumidification combined air conditioning system |
-
2015
- 2015-10-10 CN CN201510654579.8A patent/CN105258246A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280657A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Plant Eng & Constr Co Ltd | Air conditioner |
| CN1605809A (en) * | 2004-11-10 | 2005-04-13 | 曹琦 | Energy saving comfortable central air-conditioning system without electric two-way regulating valve |
| CN201434458Y (en) * | 2008-09-28 | 2010-03-31 | 广州市设计院 | Air conditioning refrigeration system for large temperature difference series connection cascade utilization |
| CN201331143Y (en) * | 2008-10-10 | 2009-10-21 | 沈致和 | Household central air-conditioning with fresh air function and hot water system |
| CN201421145Y (en) * | 2009-03-04 | 2010-03-10 | 朱玲 | Water pipe system of air conditioner |
| CN202546975U (en) * | 2012-04-16 | 2012-11-21 | 天津商业大学 | Cooling tower and dry fan coil unit plus fresh air independent dehumidification combined air conditioning system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839170A (en) * | 2017-03-17 | 2017-06-13 | 中国船舶重工集团公司第七〇四研究所 | Ship medical surgery room air handling system is without solidifying hydrothermal exchange system |
| CN109340933A (en) * | 2018-10-25 | 2019-02-15 | 华南理工大学 | A kind of big temperature difference energy-saving air conditioning system of chilled water and its implementation |
| CN110057064A (en) * | 2019-05-20 | 2019-07-26 | 浙江大冲能源科技有限公司 | A kind of combined air conditioner unit high-efficiency energy-saving control based on single cold source |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160120 |