CN110953691A - Air temperature and humidity independent control system with low energy consumption and reliability and control method thereof - Google Patents
Air temperature and humidity independent control system with low energy consumption and reliability and control method thereof Download PDFInfo
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- CN110953691A CN110953691A CN201911341043.5A CN201911341043A CN110953691A CN 110953691 A CN110953691 A CN 110953691A CN 201911341043 A CN201911341043 A CN 201911341043A CN 110953691 A CN110953691 A CN 110953691A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005265 energy consumption Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000007791 dehumidification Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008014 freezing Effects 0.000 abstract description 11
- 238000007710 freezing Methods 0.000 abstract description 11
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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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
- 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
- F24F11/46—Improving electric energy efficiency or saving
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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
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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
- F24F11/72—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
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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
- 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
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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)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an independent control system and a control method for the temperature and the humidity of air with low energy consumption and reliability. The independent control system includes: the system comprises an independently controlled dehumidification unit for sucking fresh air and an independently controlled return fan unit for sucking indoor return air; the dehumidifier set adjusts the temperature and the humidity of the fresh air to the set temperature and humidity, then the fresh air is converged with the indoor return air adjusted to the set temperature by the air return set, and then the indoor return air is input into the room; and the air quantity equivalent to the sucked fresh air is discharged from the room. The invention deals with the temperature control and humidity control by different units, and the dehumidifier unit is responsible for controlling the humidity; and the air return unit is responsible for temperature control. Compared with the existing system, the invention does not need a reheater, thereby saving more energy; the array fan is adopted, so that the power distribution power is reduced, the air quantity is conveniently adjusted, and the system reliability is improved; the dehumidification unit and the air return unit adopt different freezing water temperatures, so that the energy efficiency of the refrigeration host can be improved.
Description
Technical Field
The invention relates to the technical field of indoor air temperature and humidity regulation and control, in particular to a control system and a control method for the temperature and the humidity of air in a large-scale process workshop.
Background
The air of many process plants and factories has corresponding standards and requirements for temperature and humidity. The control system for the temperature and humidity of the large indoor space in the traditional sense is mostly a primary air return system, and the system only adopts one surface cooler to control the temperature and the humidity simultaneously. As shown in fig. 1, the conventional temperature and humidity control system includes: the air-conditioning system comprises a filter 01, a blower 02, a surface cooler 03 and a reheater 04 which are sequentially communicated by an air duct. During operation, the supplemented fresh air is converged with return air from the workshop 05, flows through the filter 01 for filtration, is input into the surface cooler 03 for heat exchange and temperature and humidity regulation through the blower 02, flows through the reheater 04 for heating and temperature balancing, and is finally input into the workshop 05. Meanwhile, the exhaust fan 06 exhausts the air quantity equivalent to the input of fresh air, and air circulation is carried out, so that the humidity and the temperature of the air in the workshop are adjusted and controlled. However, in the conventional primary air return system, dehumidification is prioritized, and the temperature of the inlet/outlet water of the surface air cooler is only 7/12 ℃, so that the temperature of the air passing through the surface air cooler is too low, and therefore, the temperature of the supplied air needs to be balanced by an electric reheater. Thus, the offset of the temperature of the cold and hot air is conducted, and energy is not saved. The blower generally adopts a centrifugal single fan, the power distribution is high, and the system reliability is poor.
Therefore, how to overcome the defects of high energy consumption, poor system reliability and low energy efficiency of the existing large-scale indoor air temperature and humidity control system is a problem to be solved urgently in the industry.
Disclosure of Invention
The invention provides an independent control system for air temperature and humidity with low energy consumption, good reliability and high unit energy efficiency and a control method thereof, aiming at solving the problems of high energy consumption, poor system reliability and low energy efficiency of the existing large-scale indoor temperature and humidity control system.
The invention provides an independent control system for the temperature and the humidity of air, which comprises an independently controlled dehumidification unit for sucking fresh air and an independently controlled return fan unit for sucking indoor return air; the dehumidifier unit adjusts the temperature and the humidity of the fresh air to set temperature and humidity, then the fresh air is converged with indoor return air adjusted to set temperature by the air return unit, and then the indoor return air is input into the room; and the air quantity equivalent to the sucked fresh air is discharged from the room.
Preferably, the dehumidification unit include by the first filter of wind channel intercommunication in proper order, first fan, preceding surface cooler and back surface cooler.
Preferably, the air return unit comprises a second filter, a second fan and a surface air cooler which are sequentially communicated through an air duct.
Preferably, the inlet/outlet water temperature of the chilled water of the front surface air cooler can be 11-13/17-19 ℃; the inlet/outlet temperature of the chilled water of the after-surface cooler can be 6-8/11-13 ℃.
Preferably, the inlet/outlet water temperature of the chilled water of the surface air cooler can be 11-13/17-19 ℃.
Preferably, the temperature difference of the inlet/outlet water temperatures of the chilled water of the front surface air cooler, the rear surface air cooler and the surface air cooler is 6-8 ℃.
Preferably, the first and second fans may be array fans.
Preferably, the first and second filters may be at least one of medium-efficiency filters or medium-efficiency filters.
The invention also provides a control method of the independent control system, which comprises the following steps:
the independently controlled dehumidifier unit sucks fresh air and adjusts the temperature and the humidity of the fresh air to set temperature and humidity;
the independently controlled air return fan set sucks indoor return air and regulates the indoor return air to a set temperature;
the fresh air regulated by the dehumidification unit is converged with the indoor return air regulated by the return fan unit and then input into the room; meanwhile, the air quantity equivalent to the sucked fresh air is discharged from the room.
The invention carries out temperature control and humidity control to different units for processing, and the fresh air unit is used as a dehumidifier for processing sucked fresh air, is responsible for humidity control and bears partial heat load indoors at the same time; the air return unit is used for air return treatment in the suction room, is responsible for temperature control and bears most of heat load in the rest rooms. The processed fresh air and the processed return air are fully mixed to reach indoor required temperature and humidity and then are sent into the room. Compared with a primary air return system of a traditional process workshop, the invention does not need an electric reheater, does not cause the phenomenon of cold and heat offset, and is more energy-saving; the fan wall (array fan) mode is adopted, so that the power distribution power is reduced, the air quantity is conveniently adjusted, and the system reliability is improved; two different freezing water temperatures are adopted, the dehumidification unit is provided with two surface coolers which are connected in series, the front surface cooler freezing water is medium-temperature freezing water, and the rear surface cooler freezing water is low-temperature freezing water; the air return fan is provided with a single surface cooler, and the chilled water is medium-temperature chilled water, so that the energy efficiency of the refrigeration main machine is improved.
Drawings
FIG. 1 is a schematic diagram of the operation of a conventional primary air return system;
fig. 2 is a schematic diagram of the working principle of the embodiment of the invention.
Detailed Description
The invention is further illustrated by the following examples and figures.
Fig. 2 shows an embodiment of the independent control system for air temperature and humidity according to the present invention, which comprises: the independently controlled dehumidifier unit 1 sucks fresh air through the air inlet 15, and the dehumidifier unit 1 adjusts the temperature and the humidity of the sucked fresh air to set temperature and humidity; and an independently controlled return air fan group 2 for sucking air of the room 3 to be temperature and humidity-regulated through a return air duct 24, wherein the return air fan group 2 regulates return air sent from the room 3 to a set temperature. Then the fresh air with the temperature and the humidity adjusted by the dehumidification unit 1 and the return air with the temperature adjusted by the return fan unit 2 are merged and then input into the room 3. Meanwhile, the air volume equivalent to the fresh air sucked by the dehumidification unit 1 is discharged from the indoor 3 through the exhaust fan 4, so that the circulation of the air in the indoor 3 and the adjustment of the air temperature and humidity are carried out.
As shown in fig. 2, in the present embodiment, the dehumidification unit 1 includes a first filter 11, a first fan 12, a front surface air cooler 13, and a rear surface air cooler 14, which are sequentially connected through an air duct. The air return unit 2 comprises a second filter 21, a second fan 22 and a surface air cooler 23 which are sequentially communicated through an air duct. The front surface air cooler 13 and the surface air cooler 23 can use medium-temperature chilled water, and the water inlet/outlet temperature of the water is 11-13/17-19 ℃. The after-surface cooler 14 can adopt low-temperature chilled water, and the water inlet/outlet temperature of the water is generally 6-8/11-13 ℃. According to the requirement, medium-temperature chilled water or low-temperature chilled water with other temperatures can be adopted, and the difference between the water inlet temperature and the water outlet temperature of each surface cooler is controlled to be 6-8 ℃, preferably 7 ℃. In the embodiment, the inlet/outlet water temperature of the front surface cooler 13 is selected to be 12/18 ℃; the inlet/outlet temperature of the chilled water of the after-surface cooler 14 was 7/12 ℃. The inlet/outlet water temperature of the surface cooler 23 was selected to be 12/18 ℃. The first fan 12 and the second fan 22 both adopt array fans. The first and second filters 11 and 21 are at least one of medium-efficiency filters or medium-efficiency filters, and other types of filters or combinations of different types of filters can be selected according to requirements.
The operation of the independent air temperature and humidity control system of the present invention is illustrated below with reference to FIG. 2:
according to the calculation, the outdoor fresh air flows from the air inlet 15 of the dehumidifying unit 1 (fresh air unit) to 40000 m3The flow/h is drawn through the first filter 11 and the first array fan 12 to the front surface air cooler 13. The temperature of the inlet/outlet water of the chilled water of the front surface cooler 13 is changed from conventional 7/12 ℃ to 12/18 ℃. The outdoor fresh air is processed by the front surface air cooler 13 to reach the set temperature T1, and then is input into the rear surface air cooler 14, the freezing inlet/outlet water temperature of the rear surface air cooler is conventional 7/12 ℃, and the outdoor fresh air processed by the rear surface air cooler 14 reaches the set temperature T2 and the set humidity RH 1.
Indoor 3 air is returned fan group 2 with 12000 m3The flow rate of the/h is sucked, and the flow passes through the second filter 21 and the second array fan 22 and then reaches the surface cooler 22. The freezing inlet and outlet water of the surface cooler 22The temperature is changed from conventional 7/12 ℃ to 12/18 ℃, and the indoor return air treated by the surface cooler 22 reaches the required temperature T3.
Finally 40000 m processed by the dehumidifier unit 13And/h outdoor fresh air and 12000 m3/h indoor return air processed by the return fan unit 2 are fully mixed to reach the temperature T0 and the humidity RH0 required by the indoor 3 environment, and the processed air is sent into the room. At the same time, the exhaust fan 4 exhausts 40000 m from the indoor part 33The flow rate/h discharges the air, thus circulating the air in the room 3 to achieve the purpose of controlling and adjusting the temperature and humidity of the air in the room 3.
The invention relates to an indoor air temperature and humidity independent control system which is improved by taking a traditional primary air return system as a prototype. The system is in the form of a dehumidifier unit and a return fan unit, and the temperature control and humidity control of indoor air are processed by different units, namely a fresh air unit is used as the dehumidifier unit and is responsible for dehumidification and simultaneously bears the heat load of indoor parts; the air return unit is responsible for controlling the temperature and bears most of heat load in the rest rooms. The fresh air treated by the dehumidifier unit is fully mixed with the return air treated by the return fan unit, and the mixture is delivered into a room after reaching the indoor required temperature and humidity.
For the tail end side of the independent temperature and humidity control system, a reheater is not needed, so that the phenomenon of cold and heat offset is avoided, energy is saved, and cost is saved; meanwhile, the traditional centrifugal single fan is replaced by adopting a fan wall (array fan) form, so that the power distribution power can be reduced; meanwhile, the number of the started fans can be controlled, so that the air quantity is adjusted. When one of the fans fails, the other fans can still work, and the system can also normally operate, so that the reliability of the system is improved; meanwhile, the cold source side of the system adopts two different freezing water temperatures: a dehumidifier unit, which is provided with two surface coolers connected in series, wherein the freezing water temperature of the front surface cooler is 12/18 ℃, and the freezing water temperature of the rear surface cooler is 7/12 ℃; the return fan set is provided with a single surface cooler, and the temperature of the refrigerated water is 12/18 ℃. The low-temperature chilled water is replaced by the medium-temperature chilled water, so that the energy efficiency of the refrigeration main machine can be improved, and the energy efficiency of a machine room can be improved.
The above-mentioned embodiments are mainly intended to illustrate the inventive concept, and it should be noted that those skilled in the art may make various changes and modifications without departing from the inventive concept, and all such changes and modifications are within the scope of the present invention.
Claims (9)
1. An independent control system for air temperature and humidity is characterized by comprising an independently controlled dehumidification unit for sucking fresh air and an independently controlled return fan unit for sucking indoor return air; the dehumidifier unit adjusts the temperature and the humidity of the fresh air to set temperature and humidity, then the fresh air is converged with indoor return air adjusted to set temperature by the air return unit, and then the indoor return air is input into the room; and the air quantity equivalent to the sucked fresh air is discharged from the room.
2. The independent control system of claim 1, wherein the dehumidifying unit comprises a first filter, a first fan, a front surface cooler and a rear surface cooler which are sequentially communicated by an air duct.
3. The independent control system of claim 2, wherein the inlet/outlet temperature of the chilled water of the front surface air cooler is 11-13/17-19 ℃; the inlet/outlet water temperature of the chilled water of the rear surface air cooler is 6-8/11-13 ℃.
4. The independent control system of claim 1, wherein the air return set comprises a second filter, a second fan and a surface air cooler which are sequentially communicated through an air duct.
5. The independent control system of claim 2, wherein the inlet/outlet temperature of the chilled water of the surface air cooler is 11-13/17-19 ℃.
6. The independent control system as claimed in claim 3 or 5, wherein the temperature difference of the inlet/outlet water temperatures of the chilled water of the front surface cooler, the rear surface cooler and the surface cooler is 6-8 ℃.
7. The independent control system of claim 1, wherein the first and second fans are both arrayed fans.
8. The independent control system of claim 1, wherein the first and second filters are at least one of medium or high efficiency filters.
9. A control method of the independent control system according to claim 1, comprising the steps of:
the independently controlled dehumidifier unit sucks in fresh air, and adjusts the temperature and the humidity of the fresh air to set temperature and humidity;
the independently controlled air return fan set sucks indoor return air and adjusts the temperature of the indoor return air to a set temperature;
the fresh air regulated by the dehumidification unit is converged with the indoor return air regulated by the return fan unit and then input into the room; meanwhile, the air quantity equivalent to the sucked fresh air is discharged from the room.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341043.5A CN110953691A (en) | 2019-12-23 | 2019-12-23 | Air temperature and humidity independent control system with low energy consumption and reliability and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911341043.5A CN110953691A (en) | 2019-12-23 | 2019-12-23 | Air temperature and humidity independent control system with low energy consumption and reliability and control method thereof |
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| CN110953691A true CN110953691A (en) | 2020-04-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484270A (en) * | 2020-12-02 | 2021-03-12 | 珠海格力电器股份有限公司 | Air conditioner and control method and control device thereof |
| CN112665044A (en) * | 2020-12-14 | 2021-04-16 | 格力电器（武汉）有限公司 | Air conditioning system and control method thereof |
| CN115419958A (en) * | 2022-11-04 | 2022-12-02 | 浙江捷峰环境科技有限公司 | Combined dehumidification system and method of fresh air double-rotor and full-return-air single-rotor dehumidifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280657A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Plant Eng & Constr Co Ltd | Air conditioner |
| CN102589058A (en) * | 2011-01-10 | 2012-07-18 | 广东迪奥技术工程有限公司 | Efficient energy-saving air-conditioning system with independently controlled temperature and humidity and adjusting method thereof |
| CN108050618A (en) * | 2017-12-25 | 2018-05-18 | 苏州海派特热能设备有限公司 | A kind of constant temperature and humidity air treatment system and processing method |
-
2019
- 2019-12-23 CN CN201911341043.5A patent/CN110953691A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280657A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Plant Eng & Constr Co Ltd | Air conditioner |
| CN102589058A (en) * | 2011-01-10 | 2012-07-18 | 广东迪奥技术工程有限公司 | Efficient energy-saving air-conditioning system with independently controlled temperature and humidity and adjusting method thereof |
| CN108050618A (en) * | 2017-12-25 | 2018-05-18 | 苏州海派特热能设备有限公司 | A kind of constant temperature and humidity air treatment system and processing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484270A (en) * | 2020-12-02 | 2021-03-12 | 珠海格力电器股份有限公司 | Air conditioner and control method and control device thereof |
| CN112484270B (en) * | 2020-12-02 | 2022-04-26 | 珠海格力电器股份有限公司 | Air conditioner and control method and control device thereof |
| CN112665044A (en) * | 2020-12-14 | 2021-04-16 | 格力电器（武汉）有限公司 | Air conditioning system and control method thereof |
| CN112665044B (en) * | 2020-12-14 | 2022-03-15 | 格力电器（武汉）有限公司 | Air conditioning system and control method thereof |
| CN115419958A (en) * | 2022-11-04 | 2022-12-02 | 浙江捷峰环境科技有限公司 | Combined dehumidification system and method of fresh air double-rotor and full-return-air single-rotor dehumidifier |
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