CN105571057B - The control method for overheat of full-liquid type air-conditioner set - Google Patents
The control method for overheat of full-liquid type air-conditioner set Download PDFInfo
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- CN105571057B CN105571057B CN201510989863.0A CN201510989863A CN105571057B CN 105571057 B CN105571057 B CN 105571057B CN 201510989863 A CN201510989863 A CN 201510989863A CN 105571057 B CN105571057 B CN 105571057B
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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
-
- 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
- F24F11/62—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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuzzy Systems (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of control method for overheat of full-liquid type air-conditioner set, comprise the following steps：(1), start shooting；(2), read and Tm is calculated；(3) if, Tm >=Tz, Tm=Tz, with highest evaporating temperature Tz operation and return to step (2)；(4), air-breathing saturation temperature To otherwise, is read, if To ＜ Tm Vt, aperture tune up, is then back to step (2)；If Tm Vt≤To≤Tm, keep existing aperture, step (5) is then performed；If To ＞ Tm, aperture are turned down, step (2) is then back to；(5), read and target exhaust degree of superheat △ Tm are calculated；(6) if, △ Tm ＞ T, aperture turns down, is then back to step (5)；If △ Tm=T, keep existing aperture, step (5) is then performed；If △ Tm ＜ T, aperture tune up, return to step (5).With target evaporating temperature and the target exhaust degree of superheat, target is preferably controlled the control method for overheat with realizing to have the liquid level of full-liquid type heat exchanger in order to control.
Description
Technical field
The present invention relates to air-conditioning technical field, is especially a kind of control method for overheat of full-liquid type air-conditioner set.
Background technology
In general, the use of the air-conditioning of full-liquid type case tube heat exchanger is with suction superheat or with discharge superheat mesh in order to control
Mark, to realize the Liquid level to full-liquid type air-conditioner set.With single suction superheat target in order to control, control there is
The deficiency of narrow range, therefore level control of the realization that it can not be relatively good to full-liquid type heat exchanger, that is, it is excessive to be possible to liquid level,
So as to cause compressor liquid hammer or run oil damage.With single discharge superheat, target, the control method are transported in unit in order to control
When row state change is larger, the embodiment delay time of discharge superheat is longer, so as to can not match with the operation of unit.Cause
This, for these reasons, it would be highly desirable to a kind of control method for overheat of full-liquid type air-conditioner set is needed, the full-liquid type air-conditioner set
Control method for overheat with target evaporating temperature and the target exhaust degree of superheat in order to control target to realize to full-liquid type heat exchanger
Liquid level, which has, preferably to be controlled, to solve the above problems.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of control method for overheat of full-liquid type air-conditioner set, this is full
The control method for overheat of liquid formula air-conditioner set with target evaporating temperature and the target exhaust degree of superheat in order to control target to realize pair
The liquid level of full-liquid type heat exchanger, which has, preferably to be controlled.
The technical scheme is that, there is provided a kind of control method for overheat of full-liquid type air-conditioner set, including following step
Suddenly：
A target evaporating temperature stability range is set, which is (Tm-Vt)~Tm, wherein Tm
For target evaporating temperature, Vt is evaporating temperature fluctuation range；One exhaust actual degree of superheat T, the actual degree of superheat T=of the exhaust is set
Tp-Tl, wherein, Tp is actual exhaust air temperature, and Tl is exhaust saturation temperature, and exhaust saturation temperature Tl can pass through actual exhaust air pressure
Power Pl is calculated；
(1), full-liquid type air-conditioner set is started shooting；
(2), read and target evaporating temperature Tm is calculated；
(3), it is full if Tm >=Tz, Tm=Tz by target evaporating temperature Tm with allowing highest evaporating temperature Tz to be contrasted
Liquid formula air-conditioner set is with highest evaporating temperature Tz operations and return to step (2)；
(4), air-breathing saturation temperature To otherwise, is read, and air-breathing saturation temperature To will be taken to stablize model with target evaporating temperature
Enclose and contrasted, if To ＜ Tm-Vt, the aperture of the electric expansion valve of full-liquid type air-conditioner set tune up, be then back to step
(2)；If Tm-Vt≤To≤Tm, the electric expansion valve of full-liquid type air-conditioner set keeps existing aperture, then performs step (5)；
If To ＞ Tm, the aperture of the electric expansion valve of full-liquid type air-conditioner set are turned down, step (2) is then back to；
(5), read and target exhaust degree of superheat △ Tm are calculated；
(6), target exhaust degree of superheat △ Tm are contrasted with being vented actual degree of superheat T, if △ Tm ＞ T, full-liquid type
The aperture of the electric expansion valve of air-conditioner set is turned down, is then back to step (5)；If △ Tm=T, the electricity of full-liquid type air-conditioner set
Sub- expansion valve keeps existing aperture, then performs step (5)；If △ Tm ＜ T, the electric expansion valve of full-liquid type air-conditioner set
Aperture tunes up, and is then back to step (5).
Collection calculates air-breathing saturation temperature To, and air-breathing saturation temperature To can be calculated by air-breathing absolute pressure Po
Arrive；One designed temperature difference Ts is set；One target evaporating temperature Tm is set, and the target evaporating temperature Tm=Tc-Ts, wherein Tc are evaporation
Device leaving water temperature；Setting one allows highest evaporating temperature Tz；Set an evaporating temperature fluctuation range Vt；Set target evaporation temperature
Stability range is spent, which is (Tm-Vt)~Tm；The reading and calculating of the target evaporating temperature Tm
Step is：
A, evaporator leaving water temperature Tc is read；
B, bring evaporator leaving water temperature Tc into Tm=Tc-Ts, obtain target evaporating temperature Tm.
One minimum work discharge superheat △ Ts are set；Set a discharge superheat width difference C；A target exhaust is set to overheat
Spend △ Tm, the target exhaust degree of superheatWherein B=Pl/Po-2.8, as B≤0, takes 0, as B ＞ 0
When, take calculated value；The reading of the target exhaust degree of superheat △ Tm and calculation procedure are：
A, exhaust absolute pressure Pl and air-breathing absolute pressure Po is read；
B, exhaust absolute pressure Pl and air-breathing absolute pressure Po is brought intoObtain target exhaust mistake
Temperature △ Tm.
The designed temperature difference Ts is 2~8 DEG C.
The evaporating temperature fluctuation range Vt is 0~5 DEG C.
The scope of the minimum work discharge superheat △ Ts is 10~20 DEG C.
The discharge superheat width difference C is 0~10 DEG C.
After above method, compared with prior art, the present invention haing the following advantages：
The control method for overheat of full-liquid type air-conditioner set of the present invention passes through first control targe evaporating temperature, then control targe
Discharge superheat method, realizes correct control full-liquid type heat exchanger to suitable liquid level, so as to avoid compressor liquid hammer or run oil
And compressor is damaged, while disclosure satisfy that full-liquid type air-conditioner set is efficiently run again.
Brief description of the drawings
Fig. 1 is the operation logic figure of full-liquid type air-conditioner set of the present invention.
1, oil eliminator shown in figure, 2, Pl back pressure transducers, 3, Tl exhaust gas temperature sensors, 4, compressor, 5,
Solenoid valve, 6, jet pump, 7, Po inspiratory pressure sensors, 8, To suction temperature sensors, 9, evaporator leaving water temperature sensors,
10th, evaporator water outlet, 11, evaporator water inlet, 12, electric expansion valve, 13, device for drying and filtering, 14, ball valve, 15, condenser, 16,
Condenser is intake, and 17, leaving condenser water, 18, leaving condenser water temperature sensor, 19, evaporator.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of control method for overheat of full-liquid type air-conditioner set of the present invention, comprises the following steps：
A target evaporating temperature stability range is set, which is (Tm-Vt)~Tm, wherein Tm
For target evaporating temperature, Vt is evaporating temperature fluctuation range；One exhaust actual degree of superheat T, the actual degree of superheat T=of the exhaust is set
Tp-Tl, wherein, Tp is actual exhaust air temperature, and Tl is exhaust saturation temperature, and exhaust saturation temperature Tl can pass through actual exhaust air pressure
Power Pl is calculated, and the value of exhaust saturation temperature Tl and actual exhaust air pressure Pl is one-to-one, ordinary skill people
Member can calculate, which says for same refrigerant.
(1), full-liquid type air-conditioner set is started shooting；
(2), read and target evaporating temperature Tm is calculated；
(3), it is full if Tm >=Tz, Tm=Tz by target evaporating temperature Tm with allowing highest evaporating temperature Tz to be contrasted
Liquid formula air-conditioner set is with highest evaporating temperature Tz operations and return to step (2)；
(4), air-breathing saturation temperature To otherwise, is read, and air-breathing saturation temperature To will be taken to stablize model with target evaporating temperature
Enclose and contrasted, if To ＜ Tm-Vt, the aperture of the electric expansion valve of full-liquid type air-conditioner set tune up, be then back to step
(2)；If Tm-Vt≤To≤Tm, the electric expansion valve of full-liquid type air-conditioner set keeps existing aperture, then performs step (5)；
If To ＞ Tm, the aperture of the electric expansion valve of full-liquid type air-conditioner set are turned down, step (2) is then back to；
(5), read and target exhaust degree of superheat △ Tm are calculated；
(6), target exhaust degree of superheat △ Tm are contrasted with being vented actual degree of superheat T, if △ Tm ＞ T, full-liquid type
The aperture of the electric expansion valve of air-conditioner set is turned down, is then back to step (5)；If △ Tm=T, the electricity of full-liquid type air-conditioner set
Sub- expansion valve keeps existing aperture, then performs step (5)；If △ Tm ＜ T, the electric expansion valve of full-liquid type air-conditioner set
Aperture tunes up, and is then back to step (5).
Collection calculates air-breathing saturation temperature To, and air-breathing saturation temperature To can be calculated by air-breathing absolute pressure Po
Arrive, the value of air-breathing saturation temperature To and air-breathing absolute pressure Po are one-to-one, and those of ordinary skill in the art can calculate
Out, which says for same refrigerant；One designed temperature difference Ts is set；One target evaporating temperature Tm, the target are set
Evaporating temperature Tm=Tc-Ts, wherein Tc are evaporator leaving water temperature；Setting one allows highest evaporating temperature Tz, it is allowed to which highest is steamed
It is 12~20 DEG C to send out temperature Tz, is 15 DEG C in the present embodiment；Set an evaporating temperature fluctuation range Vt；Set target evaporation temperature
Stability range is spent, which is (Tm-Vt)~Tm；The reading and calculating of the target evaporating temperature Tm
Step is：
A, evaporator leaving water temperature Tc is read；
B, bring evaporator leaving water temperature Tc into Tm=Tc-Ts, obtain target evaporating temperature Tm.
One minimum work discharge superheat △ Ts are set；Set a discharge superheat width difference C；A target exhaust is set to overheat
Spend △ Tm, the target exhaust degree of superheatWherein B=Pl/Po-2.8, as B≤0, takes 0, as B ＞ 0
When, take calculated value；The reading of the target exhaust degree of superheat △ Tm and calculation procedure are：
A, exhaust absolute pressure Pl and air-breathing absolute pressure Po is read；
B, exhaust absolute pressure Pl and air-breathing absolute pressure Po is brought intoObtain target exhaust mistake
Temperature △ Tm.
The designed temperature difference Ts is 2~8 DEG C, is 3 DEG C in the present embodiment.
The evaporating temperature fluctuation range Vt is 0~5 DEG C, is 2 DEG C in the present embodiment.
The scope of the minimum work discharge superheat △ Ts is 10~20 DEG C, is 13 DEG C in the present embodiment.
The discharge superheat width difference C is 0~10 DEG C, is 5 DEG C in the present embodiment.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above example, its concrete structure is allowed to vary.In every case in the protection model of independent claims of the present invention
It is within the scope of the present invention to enclose interior made various change.
Claims (7)
- A kind of 1. control method for overheat of full-liquid type air-conditioner set, it is characterised in that：Comprise the following steps：A target evaporating temperature stability range is set, which is (Tm-Vt)~Tm, and wherein Tm is mesh Evaporating temperature is marked, Vt is evaporating temperature fluctuation range；One exhaust actual degree of superheat T, the actual degree of superheat T=Tp- of the exhaust is set Tl, wherein, Tp is actual exhaust air temperature, and Tl is exhaust saturation temperature, and exhaust saturation temperature Tl can pass through actual exhaust air pressure Pl is calculated；(1), full-liquid type air-conditioner set is started shooting；(2), read and target evaporating temperature Tm is calculated；(3), by target evaporating temperature Tm with allowing highest evaporating temperature Tz to be contrasted, if Tm >=Tz, Tm=Tz, full-liquid type Air-conditioner set is with highest evaporating temperature Tz operations and return to step (2)；(4), otherwise, read air-breathing saturation temperature To, and will take air-breathing saturation temperature To and target evaporating temperature stability range into Row contrast, if To ＜ Tm-Vt, the aperture of the electric expansion valve of full-liquid type air-conditioner set tune up, is then back to step (2)；If The existing aperture of electric expansion valve holding of Tm-Vt≤To≤Tm, then full-liquid type air-conditioner set, then perform step(5)；If To ＞ Tm, the aperture of the electric expansion valve of full-liquid type air-conditioner set are turned down, step (2) is then back to；(5), read and target exhaust degree of superheat △ Tm are calculated；(6), target exhaust degree of superheat △ Tm are contrasted with being vented actual degree of superheat T, if △ Tm ＞ T, full-liquid type air-conditioning The aperture of the electric expansion valve of unit is turned down, is then back to step (5)；If △ Tm=T, the electronics of full-liquid type air-conditioner set is swollen Swollen valve keeps existing aperture, then performs step (5)；If △ Tm ＜ T, the aperture of the electric expansion valve of full-liquid type air-conditioner set Tune up, be then back to step (5).
- 2. the control method for overheat of full-liquid type air-conditioner set according to claim 1, it is characterised in that：Collection calculates suction Gas saturation temperature To, air-breathing saturation temperature To can be calculated by air-breathing absolute pressure Po；One designed temperature difference Ts is set；If A target evaporating temperature Tm is put, the target evaporating temperature Tm=Tc-Ts, wherein Tc are evaporator leaving water temperature；Setting one allows Highest evaporating temperature Tz；Set an evaporating temperature fluctuation range Vt；Set a target evaporating temperature stability range, target evaporation Temperature stabilizing range is (Tm-Vt)~Tm；The reading of the target evaporating temperature Tm and calculation procedure are：A, evaporator leaving water temperature Tc is read；B, bring evaporator leaving water temperature Tc into Tm=Tc-Ts, obtain target evaporating temperature Tm.
- 3. the control method for overheat of full-liquid type air-conditioner set according to claim 2, it is characterised in that：One most unskilled labourer is set Make discharge superheat △ Ts；Set a discharge superheat width difference C；One target exhaust degree of superheat △ Tm, the target exhaust mistake are set TemperatureWherein B=Pl/Po-2.8, as B≤0, takes 0, as B ＞ 0, takes calculated value；The target The reading of discharge superheat △ Tm and calculation procedure are：A, exhaust absolute pressure Pl and air-breathing absolute pressure Po is read；B, exhaust absolute pressure Pl and air-breathing absolute pressure Po is brought intoObtain the target exhaust degree of superheat △Tm。
- 4. the control method for overheat of full-liquid type air-conditioner set according to claim 2, it is characterised in that：The design temperature Poor Ts is 2~8 DEG C.
- 5. the control method for overheat of full-liquid type air-conditioner set according to claim 2, it is characterised in that：The evaporation temperature It is 0~5 DEG C to spend fluctuation range Vt.
- 6. the control method for overheat of full-liquid type air-conditioner set according to claim 3, it is characterised in that：The minimum work The scope of discharge superheat △ Ts is 10~20 DEG C.
- 7. the control method for overheat of full-liquid type air-conditioner set according to claim 3, it is characterised in that：The discharge superheat It is 0~10 DEG C to spend width difference C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989863.0A CN105571057B (en) | 2015-12-24 | 2015-12-24 | The control method for overheat of full-liquid type air-conditioner set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989863.0A CN105571057B (en) | 2015-12-24 | 2015-12-24 | The control method for overheat of full-liquid type air-conditioner set |
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| CN105571057B true CN105571057B (en) | 2018-05-15 |
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| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN103438544A (en) * | 2013-09-04 | 2013-12-11 | 深圳麦克维尔空调有限公司 | Method and system for controlling superheat degree of air-conditioning equipment |
| CN104634033A (en) * | 2015-01-28 | 2015-05-20 | 中国科学院青岛生物能源与过程研究所 | Electronic expansion valve control system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028516A (en) * | 2001-07-17 | 2003-01-29 | Zexel Valeo Climate Control Corp | Refrigerating cycle controller |
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2015
- 2015-12-24 CN CN201510989863.0A patent/CN105571057B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6539734B1 (en) * | 2001-12-10 | 2003-04-01 | Carrier Corporation | Method and apparatus for detecting flooded start in compressor |
| CN1645017A (en) * | 2003-10-17 | 2005-07-27 | Lg电子株式会社 | Apparatus and method for controlling the super-heating degree in a heat pump system |
| CN101901017A (en) * | 2009-05-27 | 2010-12-01 | 江森自控楼宇设备科技(无锡)有限公司 | Fuzzy control system and method of throttle mechanism |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN103438544A (en) * | 2013-09-04 | 2013-12-11 | 深圳麦克维尔空调有限公司 | Method and system for controlling superheat degree of air-conditioning equipment |
| CN104634033A (en) * | 2015-01-28 | 2015-05-20 | 中国科学院青岛生物能源与过程研究所 | Electronic expansion valve control system and method |
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