CN105066369A - Air conditioner constant air flow control method - Google Patents

Air conditioner constant air flow control method Download PDF

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Publication number
CN105066369A
CN105066369A CN201510556622.7A CN201510556622A CN105066369A CN 105066369 A CN105066369 A CN 105066369A CN 201510556622 A CN201510556622 A CN 201510556622A CN 105066369 A CN105066369 A CN 105066369A
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China
Prior art keywords
air
rotating speed
conditioner
nominal
static pressure
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CN201510556622.7A
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Chinese (zh)
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CN105066369B (en
Inventor
葛标
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HANGZHOU XIANTU ELECTRONIC Co Ltd
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HANGZHOU XIANTU ELECTRONIC 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
    • F24F11/62Control 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
    • 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
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • 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
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention relates to an air conditioner constant air flow control method. The method comprises the steps of 1, making a draught fan of an air conditioner run at the set constant rotating speed Np when the air conditioner is started, and judging static pressure P according to the torque T of the draught fan; 2, calculating the nominal rotating speed N according to the currently required nominal air volume Q of the air conditioner; 3, correcting the nominal rotating speed N with the correction rotating speed Nb to obtain the actually-required rotating speed Ns of the air conditioner, wherein the correction rotating speed Nb is calculated according to the static pressure P; 4, obtaining the actual air volume Qs, consistent with the nominal air volume Q, of the draught fan according to the actually-required rotating speed Ns, and adjusting the rotating speed of the draught fan to be the actually-required rotating speed Ns, so that constant air volume control is achieved; 5, repeating the steps 2-4 when the set nominal air volume Q is changed. By the adoption of the method according to which the static pressure is calculated by means of a mathematical model, the cost of using a static pressure gauge is reduced, and the risk that the static pressure gauge fails is avoided. The method has the advantages of being high in precision, high in response speed and low in cost and is wide in application range.

Description

Air-conditioner constant air capacity control
Technical field
The present invention relates to a kind of control method of air-conditioner, be specifically related to a kind of control method of permanent wind amount.
Background technology
Along with growth in the living standard, air-conditioner use more and more universal.But adopt the air-conditioning of ventilation shaft, aging as time goes by with the relevant device such as the accumulation of dust, the air output of air-conditioning can be more and more less, and user will be more and more dissatisfied.Also have because space reasons, need comparatively long pipeline to blow, add the linear loss of air-supply compared with long pipeline undoubtedly, arrival air quantity is reduced.Now adopt permanent Boiler pressure control, can under wider static pressure scope, maintain the constant wind quantity needed, thus increase comfort level and have and heat preferably or refrigeration.
In permanent Boiler pressure control, the technology of most critical is exactly the static pressure judging air conditioner wind outlet, to carry out correction to rotation speed of fan, reaches permanent Boiler pressure control.Existing method normally adopts static manometer to carry out measurement static pressure, and cost is higher, and static manometer exists the risk lost efficacy.Thus, existing method has certain deficiency.
Summary of the invention
The object of this invention is to provide a kind of cost and risk all lower, and the air-conditioner constant air capacity control that precision is higher.
For achieving the above object, the technical solution used in the present invention is:
A kind of air-conditioner constant air capacity control, for controlling air-conditioner, the method comprises the following steps:
(1), during start, make the blower fan of described air-conditioner with the constant rotational speed Np of setting running, now, in conjunction with described in the torque T of blower fan judge described in the static pressure P of air-conditioner;
(2) current required nominal air quantity Q, the nominal speed N corresponding to calculating of the air-conditioner according to setting;
(3) carry out correction with correction rotating speed Nb to described nominal speed N, rotating speed Ns needed for the reality obtaining described air-conditioner, described correction rotating speed Nb calculates according to described static pressure P;
(4) needed for described reality, rotating speed Ns draws the actual air volume Qs of described blower fan, and this actual air volume Qs is consistent with required described nominal air quantity Q, and the rotating speed of the blower fan described in adjustment is actual required rotating speed Ns, thus realizes permanent Boiler pressure control;
(5) when the nominal air quantity Q of the setting of described air-conditioner changes, step (2)-(4) are repeated.
In said method, during the static pressure P of the air-conditioner described in judgement, environment temperature is adopted to carry out correction to it.
The method of the static pressure P described in calculating is: wherein η is the total pressure efficiency of described blower fan, and a, b are the blower fan characteristic coefficient relevant to environment temperature, and γ is constant.
The computational methods of the nominal speed N corresponding to calculating according to described nominal air quantity Q are: Q=N*a+b, wherein, a, b are the blower fan characteristic coefficient relevant to environment temperature.
Described correction air quantity Qb and described static pressure P is linear relationship.
Rotating speed Ns needed for described reality is described nominal speed N and described correction rotating speed Nb sum.
Because technique scheme is used, the present invention compared with prior art has following advantages: constant air capacity control of the present invention adopts the method for calculated with mathematical model static pressure, reduce the cost using static manometer, and avoid the risk of static manometer inefficacy, have the advantage that precision is high, reaction speed is fast, cost is low, it is applied widely.
Accompanying drawing explanation
Accompanying drawing 1 is control logic figure of the present invention.
Accompanying drawing 2 be static pressure constant time, the air quantity of air-conditioner and the relation schematic diagram of rotating speed.
Accompanying drawing 3 be air quantity constant time, the static pressure of air-conditioner and the relation schematic diagram of rotating speed.
Detailed description of the invention
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment one: shown in accompanying drawing 1.For controlling an air-conditioner constant air capacity control for air-conditioner, comprise the following steps:
(1) calculating of static pressure P:
When air-conditioner is started shooting at every turn, make the blower fan of air-conditioner with some constant rotational speed Np runnings of setting.Now, the static pressure P of air-conditioner is judged in conjunction with the torque T of blower fan.Static pressure P is the function about the constant rotational speed Np set and torque T.Preferably, in order to increase the reliability of precision and model, when judging the static pressure P of air-conditioner, environment temperature is adopted to carry out correction to it.Therefore, the method for calculated static pressure P is: wherein η is the total pressure efficiency of described blower fan, and a, b are the blower fan characteristic coefficient relevant to environment temperature, and γ is constant.
(2) calculating of the nominal speed N that nominal air quantity Q is corresponding:
According to the current required nominal air quantity Q of the air-conditioner of setting, calculate the nominal speed N corresponding to it.As shown in Figure 2, when static pressure is constant, the air quantity of air-conditioner and the rotating speed of blower fan roughly linear.The computational methods of nominal air quantity Q are: Q=N*a+b, and wherein, a, b are the blower fan characteristic coefficient relevant to environment temperature, therefore can calculate corresponding nominal speed N according to nominal air quantity Q.
(3) calculating of actual required rotating speed Ns:
Correction is carried out, rotating speed Ns needed for the reality obtaining air-conditioner with the nominal speed N that correction rotating speed Nb is corresponding to the nominal air quantity Q of blower fan.Correction rotating speed Nb calculates according to static pressure P.As shown in Figure 3, correction air quantity Qb and static pressure P is linear relationship.And actual required rotating speed Ns is nominal speed N and correction rotating speed Nb sum, i.e. Ns=N+Nb.
(4) adjustment of rotating speed:
When air quantity is constant, roughly in the linear relationship shown in accompanying drawing 3 between static pressure and rotating speed.Obtain the actual air volume Qs of blowing machine according to actual required rotating speed Ns, this actual air volume Qs is consistent with required nominal air quantity Q, and the rotating speed of adjustment blower fan is actual required rotating speed Ns, thus can realize the permanent Boiler pressure control of air-conditioner.
(5), when user sets the wind-speed gear of air-conditioner, when namely nominal air quantity Q changes, step (2)-(4) are repeated.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (6)

1. an air-conditioner constant air capacity control, for controlling air-conditioner, is characterized in that: the method comprises the following steps:
(1), during start, make the blower fan of described air-conditioner with the constant rotational speed Np of setting running, now, in conjunction with described in the torque T of blower fan judge described in the static pressure P of air-conditioner;
(2) current required nominal air quantity Q, the nominal speed N corresponding to calculating of the air-conditioner according to setting;
(3) carry out correction with correction rotating speed Nb to described nominal speed N, rotating speed Ns needed for the reality obtaining described air-conditioner, described correction rotating speed Nb calculates according to described static pressure P;
(4) needed for described reality, rotating speed Ns draws the actual air volume Qs of described blower fan, and this actual air volume Qs is consistent with required described nominal air quantity Q, and the rotating speed of the blower fan described in adjustment is actual required rotating speed Ns, thus realizes permanent Boiler pressure control;
(5) when the nominal air quantity Q of the setting of described air-conditioner changes, step (2)-(4) are repeated.
2. air-conditioner constant air capacity control according to claim 1, is characterized in that: during the static pressure P of the air-conditioner described in judgement, adopts environment temperature to carry out correction to it.
3. air-conditioner constant air capacity control according to claim 2, is characterized in that: the method for the static pressure P described in calculating is: wherein η is the total pressure efficiency of described blower fan, and a, b are the blower fan characteristic coefficient relevant to environment temperature, and γ is constant.
4. air-conditioner constant air capacity control according to claim 1, is characterized in that: the computational methods of the nominal speed N corresponding to calculating according to described nominal air quantity Q are: Q=N*a+b, wherein, a, b are the blower fan characteristic coefficient relevant to environment temperature.
5. air-conditioner constant air capacity control according to claim 1, is characterized in that: described correction air quantity Qb and described static pressure P is linear relationship.
6. air-conditioner constant air capacity control according to claim 1, is characterized in that: rotating speed Ns needed for described reality is described nominal speed N and described correction rotating speed Nb sum.
CN201510556622.7A 2015-09-02 2015-09-02 Air conditioner constant air capacity control Active CN105066369B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109442693A (en) * 2018-11-05 2019-03-08 广东美的暖通设备有限公司 A kind of method, apparatus and air-conditioning of air-blower control
CN110470035A (en) * 2019-07-11 2019-11-19 海信(山东)空调有限公司 Static pressure modification method, device and the air-cooled ducted air conditioner of air-cooled ducted air conditioner
CN110763450A (en) * 2019-11-12 2020-02-07 宁波奥克斯电气股份有限公司 Constant air volume function test method
CN111089407A (en) * 2019-12-17 2020-05-01 广东美的暖通设备有限公司 Air conditioner air supply amount control method and device, air conditioner and medium

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WO2010131336A1 (en) * 2009-05-13 2010-11-18 三菱電機株式会社 Air conditioning device
CN102748843A (en) * 2012-07-24 2012-10-24 海信(山东)空调有限公司 System and method for controlling constant air volume of air duct type air conditioning indoor unit
CN103809437A (en) * 2012-11-13 2014-05-21 中山大洋电机股份有限公司 Constant-air-volume control method for motor
CN103852398A (en) * 2014-03-12 2014-06-11 上海夏普电器有限公司 Method for detecting failure of static pressure difference of dust-collection filter screen based on temperature correction
CN104279690A (en) * 2013-07-11 2015-01-14 海尔集团公司 Static pressure air-speed control method
CN104344492A (en) * 2013-07-25 2015-02-11 广东美的制冷设备有限公司 Pipeline type ventilation device and air volume control method thereof
CN104729017A (en) * 2015-03-16 2015-06-24 广东美的暖通设备有限公司 Constant-air-flow control method and device for air conditioner

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
WO2010131336A1 (en) * 2009-05-13 2010-11-18 三菱電機株式会社 Air conditioning device
CN102748843A (en) * 2012-07-24 2012-10-24 海信(山东)空调有限公司 System and method for controlling constant air volume of air duct type air conditioning indoor unit
CN103809437A (en) * 2012-11-13 2014-05-21 中山大洋电机股份有限公司 Constant-air-volume control method for motor
CN104279690A (en) * 2013-07-11 2015-01-14 海尔集团公司 Static pressure air-speed control method
CN104344492A (en) * 2013-07-25 2015-02-11 广东美的制冷设备有限公司 Pipeline type ventilation device and air volume control method thereof
CN103852398A (en) * 2014-03-12 2014-06-11 上海夏普电器有限公司 Method for detecting failure of static pressure difference of dust-collection filter screen based on temperature correction
CN104729017A (en) * 2015-03-16 2015-06-24 广东美的暖通设备有限公司 Constant-air-flow control method and device for air conditioner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109442693A (en) * 2018-11-05 2019-03-08 广东美的暖通设备有限公司 A kind of method, apparatus and air-conditioning of air-blower control
CN110470035A (en) * 2019-07-11 2019-11-19 海信(山东)空调有限公司 Static pressure modification method, device and the air-cooled ducted air conditioner of air-cooled ducted air conditioner
CN110763450A (en) * 2019-11-12 2020-02-07 宁波奥克斯电气股份有限公司 Constant air volume function test method
CN111089407A (en) * 2019-12-17 2020-05-01 广东美的暖通设备有限公司 Air conditioner air supply amount control method and device, air conditioner and medium

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