CN106642589A - Enthalpy value control method of full fresh air constant-temperature constant-humidity unit - Google Patents

Enthalpy value control method of full fresh air constant-temperature constant-humidity unit Download PDF

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Publication number
CN106642589A
CN106642589A CN201611255465.7A CN201611255465A CN106642589A CN 106642589 A CN106642589 A CN 106642589A CN 201611255465 A CN201611255465 A CN 201611255465A CN 106642589 A CN106642589 A CN 106642589A
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China
Prior art keywords
fresh air
enthalpy
control method
constant temperature
humidity unit
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CN201611255465.7A
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Chinese (zh)
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CN106642589B (en
Inventor
苏经校
林创辉
蔡乐坤
谢永健
陆思荣
吴东华
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Guangdong Shenling Environmental Systems Co Ltd
Guangdong Shenling Air Conditioning Equipment Co Ltd
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Guangdong Shenling Air Conditioning Equipment Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/0001Control or safety arrangements for ventilation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/20Humidity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data

Abstract

The invention relates to an enthalpy value control method of a full fresh air constant-temperature constant-humidity unit. The unit comprises a plurality of pre-cooling systems and a re-cooling system. The enthalpy value control method comprises the steps: detecting the temperature and humidity of fresh air and calculating the enthalpy value, comparing the enthalpy value of the fresh air with the predetermined enthalpy value after pretreatment, and determining the quantity of the pre-cooling systems to be started; and allowing fresh air to pass through the plurality of pre-cooling systems first and then through the re-cooling system and finally entering rooms. By comparing the enthalpy value of fresh air with the predetermined enthalpy value after pretreatment, the quantity of enabled preheating systems is reasonably selected, the energy consumption is further saved while fresh air is fully preheated.

Description

A kind of Enthalpy Control Method of all-fresh air constant temperature and humidity unit
Technical field
This patent is related to enthalpy control field, and in particular to a kind of Enthalpy Control Method of all-fresh air constant temperature and humidity unit.
Background technology
All-fresh air constant temperature and humidity unit is to provide a kind of apparatus of air conditioning of fresh air, can wanting by use environment Seek the function of reaching constant temperature and humidity or fresh air is provided merely, its operation principle is passed through in outdoor extraction ozone Dedusting, dehumidifying(Or humidification), cooling(Or heat up)Deng interior is sent to by blower fan after processing, indoor original air is replaced.
At present for all-fresh air constant temperature and humidity unit is all using conventional Temperature and Humidity Control, when the operating mode satisfaction setting in room will After asking, compressor is out of service, but now blower fan is still running, it is likely that outdoor undressed fresh air operating mode is introduced into room It is interior, extreme shock is caused to the humiture in room.
A kind of whole-fresh air precision air conditioning system is provided in notification number is for the patent application publication text of CN1707188A, Including the new wind filter, chilldown system, pre- thermoelectric heater, cryogenic system, humidifier being sequentially connected, deep thermoelectric heater and Blower fan is constituted, and is realized by the way that air is divided into pretreatment and depths reason, and the cold, heat between pretreatment and depths reason presses one Fixed ratio is allocated.Wherein refrigeration control process is as follows:According to user set precooling after the corresponding enthalpy of humiture with it is pre- The corresponding enthalpy of actual humiture after cold section, when enthalpy of the actual enthalpy more than setting, exports one through PID arithmetic 0 ~ 100% PID control value to precooling zone, so as to control the refrigerating capacity of precooling zone;When actual enthalpy is less than the enthalpy of setting When, refrigeration unit is out of service.In the deep cooling stage;By the corresponding enthalpy of actual controlled indoor temperature and humidity and user's setting temperature The PID control value that the corresponding enthalpy of humidity is exported through PID arithmetic controlling the operation of cryogenic, when actual enthalpy is less than setting During fixed enthalpy, refrigeration unit is out of service;When enthalpy of the actual enthalpy more than setting, the PID of 0 ~ 100% is exported Controlling value, so as to control the refrigerating capacity of compressor, the temperature for making control indoor reaches the temperature of user's setting.
Although the program can have ignored the refrigeration machine of precooling zone with flexible modulation precooling zone and the refrigerating capacity of cryogenic Whether group can complete refrigeration demand, and particularly under fresh air operating mode rugged environment, a refrigeration unit may be not enough to allow After precooling the corresponding enthalpy of the humiture of fresh air reach user setting enthalpy, so as to refrigeration unit cause excess load running so that In breaking down, reliability is low.
The content of the invention
In order to overcome the defect of prior art, this patent to provide a kind of enthalpy control side of all-fresh air constant temperature and humidity unit Method, fully can carry out precooling to fresh air, and reliability is high.
For this patent, above-mentioned technical problem is so solved:A kind of all-fresh air constant temperature and humidity unit Enthalpy Control Method, the unit includes chilldown system and again cooling system, and the quantity of chilldown system is multiple;The enthalpy control The step of method processed, is as follows:
S1:The humiture of detection fresh air simultaneously calculates its enthalpy, and enthalpy after fresh air enthalpy and pretreatment set in advance is compared Compared with judgement needs the quantity of the chilldown system opened;
S2:Make fresh air first pass through multiple chilldown systems, after through cooling system again, finally enter interior.
This patent selects the quantity for opening chilldown system according to actual conditions, and accurately and effectively fresh air is pre-processed, Save energy, adaptability is good, reliable while multiple chilldown systems are operated simultaneously, it is ensured that fresh air can be pre-processed sufficiently Property it is high.
Further, enthalpy sets according to fresh air operating mode after pretreatment set in advance in step S1.
Fresh air operating mode refers to the enthalpy for being introduced into the Fresh air handing in room to indoor requirement, that is, enthalpy is according to room after pre-processing The enthalpy setting of interior requirement, makes the fresh air for getting in be unlikely to impact room air, and reliability is high, and adaptability is good.
Further, the cooling parameters of the chilldown system in step S1 are according to fresh air operating condition design.
The cooling parameters refer to the structure to devices such as chilldown system inner compressor, heat exchangers, according to fresh air operating mode The internal structure of chilldown system is rationally set, fresh air is more fully pre-processed, make the enthalpy of fresh air full after the pre-treatment The requirement of enthalpy after foot pretreatment set in advance, precooling effect is good.
Further, the value of the difference after enthalpy subtracts each other after the enthalpy of fresh air and pretreatment set in advance is preset Scope, by the span of difference multiple intervals are divided into, and each interval correspondence starts the chilldown system of varying number;The step The process compared in rapid S1 is enthalpy subtraction calculations difference after enthalpy and the pretreatment set in advance of fresh air, and determines and calculate The interval belonging to difference arrived, the affiliated interval chilldown system for starting respective amount.
Further, the interval quantity is corresponding with the quantity of chilldown system.
Further, whether the start and stop of the cooling system again meet the enthalpy requirement control of room air according to room air System.
If room air has met enthalpy requirement, stop cooling system again;If it is not, then opening cooling system again;Saving energy consumption While also avoid cooling system continued operation again from breaking down, reliability is high.
Further, the humiture of fresh air is detected by temp probe and moisture probe in step S1.
Further, the quantity of the chilldown system is two or three.
It is different from prior art, this patent has the beneficial effect that:
This patent compares pretreated fresh air enthalpy and fresh air enthalpy set in advance by arranging some chilldown systems, The quantity of control chilldown system, it is ensured that the abundant precooling of fresh air, reaches pre-processing requirements, while adaptability is good, reliability is high The energy is saved.
Description of the drawings
Fig. 1 is that this patent opens the flow chart of quantity with regard to judging chilldown system.
Fig. 2 is flow chart of this patent with regard to Fresh air handing.
Specific embodiment
A kind of Enthalpy Control Method of all-fresh air constant temperature and humidity unit as illustrated in fig. 1 and 2, the unit includes precooling system System and again cooling system, the quantity of chilldown system is multiple;The step of Enthalpy Control Method, is as follows:
S1:The humiture of fresh air is detected by temp probe and moisture probe and its enthalpy is calculated, by fresh air enthalpy with set in advance Enthalpy is compared after fixed pretreatment, judges the quantity of the chilldown system that needs are opened;
S2:Make fresh air first pass through multiple chilldown systems, after through cooling system again, finally enter interior.
This patent selects the quantity for opening chilldown system according to actual conditions, and accurately and effectively fresh air is pre-processed, Save energy, adaptability is good, reliable while multiple chilldown systems are operated simultaneously, it is ensured that fresh air can be pre-processed sufficiently Property it is high.
Enthalpy sets according to fresh air operating mode after pretreatment set in advance in step S1.
Fresh air operating mode refers to the enthalpy for being introduced into the Fresh air handing in room to indoor requirement, that is, enthalpy is according to room after pre-processing The enthalpy setting of interior requirement, makes the fresh air for getting in be unlikely to impact room air, and reliability is high, and adaptability is good.
The cooling parameters of the chilldown system in step S1 are according to fresh air operating condition design.
The cooling parameters refer to the structure to devices such as chilldown system inner compressor, heat exchangers, according to fresh air operating mode The internal structure of chilldown system is rationally set, fresh air is more fully pre-processed, make the enthalpy of fresh air full after the pre-treatment The requirement of enthalpy, improves precooling effect after foot pretreatment set in advance.
The span of the difference after enthalpy subtracts each other after the enthalpy of fresh air and pretreatment set in advance is preset, by difference The span of value is divided into multiple intervals, and each interval correspondence starts the chilldown system of varying number;Compare in step S1 Compared with process be enthalpy subtraction calculations difference after enthalpy and the pretreatment set in advance of fresh air, and determine calculated difference Affiliated interval, the affiliated interval chilldown system for starting respective amount.
The interval quantity is corresponding with the quantity of chilldown system, in specific implementation process, can be set to 2 or 3.
Whether the start and stop of the cooling system again meet the enthalpy requirement control of room air according to room air, if Interior Space Gas has met enthalpy requirement, then stop cooling system again;If it is not, then opening cooling system again;Also avoid again while saving energy consumption cold Systems stay running is broken down, and reliability is high.

Claims (8)

1. a kind of Enthalpy Control Method of all-fresh air constant temperature and humidity unit, the unit includes chilldown system and again cooling system, Characterized in that, the quantity of the chilldown system is multiple;The step of Enthalpy Control Method, is as follows:
S1:The humiture of detection fresh air simultaneously calculates its enthalpy, and enthalpy after fresh air enthalpy and pretreatment set in advance is compared Compared with judgement needs the quantity of the chilldown system opened;
S2:Make fresh air first pass through multiple chilldown systems, after through cooling system again, finally enter interior.
2. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to claim 1, it is characterised in that described Enthalpy sets according to fresh air operating mode after pretreatment set in advance in step S1.
3. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to claim 1, it is characterised in that described The cooling parameters of the chilldown system in step S1 are according to fresh air operating condition design.
4. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to claim 1, it is characterised in that in advance The span of the difference after enthalpy subtracts each other after enthalpy and the pretreatment set in advance of setting fresh air, by the span of difference Multiple intervals are divided into, each interval correspondence starts the chilldown system of varying number;The process compared in step S1 is new Enthalpy subtraction calculations difference after the enthalpy of wind and pretreatment set in advance, and determine the interval belonging to calculated difference, The affiliated interval chilldown system for starting respective amount.
5. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to claim 4, it is characterised in that described Interval quantity is corresponding with the quantity of chilldown system.
6. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to any one of claim 1 ~ 5, its feature It is whether the start and stop of the cooling system again meet the enthalpy requirement control of room air according to room air.
7. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to any one of claim 1 ~ 5, its feature It is that the humiture of fresh air is detected by temp probe and moisture probe in step S1.
8. the Enthalpy Control Method of a kind of all-fresh air constant temperature and humidity unit according to any one of claim 1 ~ 5, its feature It is that the quantity of the chilldown system is two or three.
CN201611255465.7A 2016-12-30 2016-12-30 Enthalpy value control method of full fresh air constant temperature and humidity unit Active CN106642589B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107355954A (en) * 2017-08-04 2017-11-17 上海吉荣空调科技有限公司 A kind of all-fresh air thermostatic constant wet control system and method
CN108168052A (en) * 2017-12-27 2018-06-15 江苏联宏智慧能源股份有限公司 A kind of central air-conditioning refrigeration system optimal on-off control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2684070Y (en) * 2004-03-22 2005-03-09 东莞市广大制冷有限公司 Module control precision air conditioning system
CN1707188A (en) * 2004-06-08 2005-12-14 东莞市广大制冷有限公司 Whole-fresh air precision air conditioning system
CN202581623U (en) * 2012-03-19 2012-12-05 上海理工大学 Humidity independent control fresh air processor for radiation air-conditioning system
US9097432B2 (en) * 2010-01-12 2015-08-04 Honeywell International Inc. Economizer control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2684070Y (en) * 2004-03-22 2005-03-09 东莞市广大制冷有限公司 Module control precision air conditioning system
CN1707188A (en) * 2004-06-08 2005-12-14 东莞市广大制冷有限公司 Whole-fresh air precision air conditioning system
US9097432B2 (en) * 2010-01-12 2015-08-04 Honeywell International Inc. Economizer control
CN202581623U (en) * 2012-03-19 2012-12-05 上海理工大学 Humidity independent control fresh air processor for radiation air-conditioning system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107355954A (en) * 2017-08-04 2017-11-17 上海吉荣空调科技有限公司 A kind of all-fresh air thermostatic constant wet control system and method
CN108168052A (en) * 2017-12-27 2018-06-15 江苏联宏智慧能源股份有限公司 A kind of central air-conditioning refrigeration system optimal on-off control method
CN108168052B (en) * 2017-12-27 2020-01-31 江苏联宏智慧能源股份有限公司 optimal start-stop control method for central air-conditioning refrigeration system

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