CN104713201A - Control method for operation frequency of variable-frequency air conditioning unit - Google Patents
Control method for operation frequency of variable-frequency air conditioning unit Download PDFInfo
- Publication number
- CN104713201A CN104713201A CN201510163843.8A CN201510163843A CN104713201A CN 104713201 A CN104713201 A CN 104713201A CN 201510163843 A CN201510163843 A CN 201510163843A CN 104713201 A CN104713201 A CN 104713201A
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- China
- Prior art keywords
- frequency
- temperature
- compressor
- time point
- eat
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Classifications
-
- 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
- F24F11/62—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
Abstract
The invention discloses a control method for operation frequency of a variable-frequency air conditioning unit. The control method comprises the following steps: a, initially operating a variable-frequency compressor for 3-5 minutes; b, calculating temperature difference delta T1 between an air inlet temperature at the moment and an indoor target temperature set by a user, and operating for one detection time quantum at the original frequency; c, calculating temperature difference delta Tn between an air inlet temperature at the moment and the indoor set temperature set by the user; and d, substituting the operation frequency Fn-1 of the compressor at the moment, the temperature difference delta Tn at the moment and the temperature difference delta Tn-1 of the last time point at interval of one detection time quantum into a formula Fn=Fn-1+K1*delta Tn+K2*(Delta Tn-Delta Tn-1), thereby obtaining the regulating frequency Fn of the compressor at the moment, and operating for one detection time quantum at the regulating frequency Fn. The method can be used for quickly stabilizing the output frequency of the compressor, so that the output frequency of the compressor is stabilized at the optimal operation point.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically a kind of control method of convertible frequency air-conditioner unit running frequency.
Background technology
When the convertible frequency air-conditioner unit of prior art runs, the EAT of indoor set is equal to indoor environment temperature, running frequency this moment, just by indoor set EAT and indoor objects temperature being compared, is is simply added and subtracted 1-3Hz according to difference size by running frequency.As found, the temperature difference between indoor set EAT and indoor objects temperature is 3 DEG C, just ongoing frequency is increased 3Hz, if the temperature difference only 1 DEG C, just adds 1Hz.In actual motion, there is a problem in this control method, be exactly do not consider the rate-adaptive pacemaker of compressor and EAT hysteresis quality of indoor environment temperature and indoor set, inertia when compressor raising frequency or frequency reducing is not considered yet, as the temperature difference only have 1 DEG C time, if according to the method, continue to increase frequency, frequency can be caused to increase excessive, EAT is exceeded indoor objects temperature, need again frequency reducing that room is lowered the temperature, but frequency reducing amplitude is often excessive again, frequency reducing excessively makes room temperature again lower than indoor objects temperature, also need again raising frequency frequency reducing more repeatedly.Therefore this control method, well cannot stablize room temperature, be difficult to make compressor operating frequency fast and stable, compressor operating frequency can be caused repeatedly to fluctuate up and down, and then make room temperature also recurrent fluctuations, increase compressor burden, power consumption is large, and user's comfortableness is poor.
Summary of the invention
The technical problem to be solved in the present invention is, there is provided a kind of can the output frequency of fast and stable compressor, compressor output frequency is stabilized in run the control method of the convertible frequency air-conditioner unit running frequency of Best Point, fast and stable room temperature, the unit power consumption that reduces, adding users comfort level.
Technical solution of the present invention is, provide a kind of control method of convertible frequency air-conditioner unit running frequency, its concrete steps are as follows:
A, frequency-changeable compressor initial launch 3 ~ 5 minutes;
Temperature difference T between the indoor objects temperature that b, the EAT calculating this time point and user set
1, if heating mode, Δ T
1then deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
1then deduct indoor objects temperature with EAT; And continue with original frequency run one detection time section;
Temperature difference T between the indoor objects temperature that c, the EAT calculating this time point and user set
n, if heating mode, Δ T
nthen deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
nthen deduct indoor objects temperature with EAT;
D, compressor operating frequency F with this time point
n-1, this time point temperature difference T
n, be separated by one detection time section the temperature difference T of a upper time point
n-1bring following formula into, obtain the compressor regulating frequency F of this time point
n, and with regulating frequency F
nrun one detection time section;
F
n＝F
n-1+K
1﹡ΔT
n+K
2﹡(ΔT
n-ΔT
n-1)
Wherein, K
1for empirical, unit is Hz/ DEG C, K
2also be empirical, unit is Hz/ DEG C.
E, repetition step c ~ d, until compressor shutdown.
The principle of this decision method is: the method is when calculating regulating frequency, introduce the concept of the difference of two temperature difference between former and later two of section detection time, two temperature difference differences are multiplied by an empirical, like this, fully compensate for the hysteresis quality between compressor frequency output with EAT, also with respect to the inertia of compressor lifting frequency, guarantee that regulating frequency can not be higher or on the low side, make compressor output frequency fast and stable at operation Best Point.
Adopt above method, the control method of convertible frequency air-conditioner unit running frequency of the present invention compared with prior art, has the following advantages:
By the method, fast and stable room temperature, makes compressor output frequency fast and stable at operation Best Point, avoids causing repeatedly fluctuating up and down of compressor operating frequency, reduce compressor burden and power consumption, use adding users comfort level.
As preferably, detection time, section was 2 minutes, K
1for 1Hz/ DEG C, K
2for 2Hz/ DEG C, test through prolonged and repeated, above-mentioned parameter and detection time section can guarantee that regulating frequency is neither too much nor too little, namely can not cause and regulate number of times too much to strengthen units consumption, can guarantee again to reach power Best Point fast.
Detailed description of the invention
The control method of convertible frequency air-conditioner unit running frequency of the present invention, its concrete steps are as follows.
A, frequency-changeable compressor initial launch 3 ~ 5 minutes; I.e. air-conditioning conveniently pattern startup, first determines an original frequency according to the temperature difference between indoor objects temperature and EAT, continuous service 3 ~ 5 minutes after raising frequency to this original frequency.
Temperature difference T between the indoor objects temperature that b, the EAT calculating this time point and user set
1, if heating mode, Δ T
1then deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
1then deduct indoor objects temperature with EAT; And continue with original frequency run one detection time section; In the present embodiment, detection time, section was 2 minutes, and namely unit is recording temperature difference T
1continue operation 2 minutes.
Temperature difference T between the indoor objects temperature that c, the EAT calculating this time point and user set
n, if heating mode, Δ T
nthen deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
nthen deduct indoor objects temperature with EAT; In particular, be calculate the temperature difference T of operation after 2 minutes
n.
D, compressor operating frequency F with this time point
n-1, this time point temperature difference T
n, be separated by one detection time section the temperature difference T of a upper time point
n-1bring following formula into, obtain the compressor regulating frequency F of this time point
n, and with regulating frequency F
nrun one detection time section; The regulating frequency of a time point, just equals the compressor operating frequency of next time point after a time period of interval in fact.
F
n＝F
n-1+K
1﹡ΔT
n+K
2﹡(ΔT
n-ΔT
n-1)
Wherein, K
1for empirical, unit is Hz/ DEG C, K
2also be empirical, unit is Hz/ DEG C.In this embodiment, K
1for 1Hz/ DEG C, K
2for 2Hz/ DEG C.
Unit first time calculates regulating frequency F
ntime, the temperature difference T of a upper time point
n-1be exactly Δ T
1.After, the temperature difference T that each time point records
n, be exactly the Δ T of next time point in fact
n-1.
E, repetition step c ~ d, until compressor shutdown.
Below, several concrete data instance is lifted.
Under heating mode, the indoor objects temperature of user's setting is 28 DEG C, and the EAT of first time point is 25 DEG C, and the temperature of second time point of interval after 2 minutes is 27 DEG C, the running frequency F of this time point
n-1for 55Hz, then Δ T
nbe 1 DEG C, and Δ T
n-1be 3 DEG C, the regulating frequency F of this time point
nfor 52Hz, namely in next 2 minutes, compressor runs with 52Hz.
Under heating mode, the indoor objects temperature of user's setting is 28 DEG C, and the EAT of first time point is 27 DEG C, and the temperature of second time point of interval after 2 minutes is 28.5 DEG C, the running frequency F of this time point
n-1for 52Hz, then Δ T
nfor-0.5 DEG C, and Δ T
n-1be 1 DEG C, the regulating frequency F of this time point
nfor 48.5Hz, namely in next 2 minutes, compressor runs with 48.5Hz.
Under refrigeration mode, the indoor objects temperature of user's setting is 18 DEG C, and the EAT of first time point is 22 DEG C, and the temperature of second time point of interval after 2 minutes is 19 DEG C, the running frequency F of this time point
n-1for 60Hz, then Δ T
nbe 1 DEG C, and Δ T
n-1be 4 DEG C, the regulating frequency F of this time point
nfor 55Hz, namely in next 2 minutes, compressor runs with 55Hz.
Claims (2)
1. a control method for convertible frequency air-conditioner unit running frequency, is characterized in that: its concrete steps are as follows:
A, frequency-changeable compressor initial launch 3 ~ 5 minutes;
Temperature difference T between the indoor objects temperature that b, the EAT calculating this time point and user set
1, if heating mode, Δ T
1then deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
1then deduct indoor objects temperature with EAT; And continue with original frequency run one detection time section;
Temperature difference T between the indoor objects temperature that c, the EAT calculating this time point and user set
n, if heating mode, Δ T
nthen deduct EAT by indoor objects temperature, if refrigeration mode, Δ T
nthen deduct indoor objects temperature with EAT;
D, compressor operating frequency F with this time point
n-1, this time point temperature difference T
n, be separated by one detection time section the temperature difference T of a upper time point
n-1bring following formula into, obtain the compressor regulating frequency F of this time point
n, and with regulating frequency F
nrun one detection time section;
F
n＝F
n-1+K
1﹡ΔT
n+K
2﹡(ΔT
n-ΔT
n-1)
Wherein, K
1for empirical, unit is Hz/ DEG C, K
2also be empirical, unit is Hz/ DEG C.
E, repetition step c ~ d, until compressor shutdown.
2. the control method of convertible frequency air-conditioner unit running frequency according to claim 1, is characterized in that: detection time, section was 2 minutes, K
1for 1Hz/ DEG C, K
2for 2Hz/ DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163843.8A CN104713201B (en) | 2015-04-09 | 2015-04-09 | The control method of convertible frequency air-conditioner unit running frequency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163843.8A CN104713201B (en) | 2015-04-09 | 2015-04-09 | The control method of convertible frequency air-conditioner unit running frequency |
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|---|---|
| CN104713201A true CN104713201A (en) | 2015-06-17 |
| CN104713201B CN104713201B (en) | 2017-08-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588268A (en) * | 2015-06-30 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Control method for multi-online air conditioner system and indoor unit |
| CN106599581A (en) * | 2016-12-15 | 2017-04-26 | 江西江特电气集团有限公司 | Method of frequency converter of simulating eddy current deceleration time |
| CN107461960A (en) * | 2017-07-27 | 2017-12-12 | 广东美的制冷设备有限公司 | Source pump and its energy-saving control method and control device |
| CN109539464A (en) * | 2018-11-14 | 2019-03-29 | 海信（山东）空调有限公司 | Air conditioning control method and device |
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| JPS6078241A (en) * | 1983-10-05 | 1985-05-02 | Daikin Ind Ltd | Signal transmission device of separate type air conditioning device |
| TW200921031A (en) * | 2007-11-14 | 2009-05-16 | Ind Tech Res Inst | Energy saving control method and device thereof |
| CN101539151A (en) * | 2008-03-18 | 2009-09-23 | 海尔集团公司 | Method and device for controlling inverter compressor |
| CN102345915A (en) * | 2011-08-02 | 2012-02-08 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
-
2015
- 2015-04-09 CN CN201510163843.8A patent/CN104713201B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078241A (en) * | 1983-10-05 | 1985-05-02 | Daikin Ind Ltd | Signal transmission device of separate type air conditioning device |
| TW200921031A (en) * | 2007-11-14 | 2009-05-16 | Ind Tech Res Inst | Energy saving control method and device thereof |
| CN101539151A (en) * | 2008-03-18 | 2009-09-23 | 海尔集团公司 | Method and device for controlling inverter compressor |
| CN102345915A (en) * | 2011-08-02 | 2012-02-08 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588268A (en) * | 2015-06-30 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Control method for multi-online air conditioner system and indoor unit |
| CN105588268B (en) * | 2015-06-30 | 2019-03-05 | 青岛海信日立空调系统有限公司 | The control method and indoor unit of multi-online air-conditioning system |
| CN106599581A (en) * | 2016-12-15 | 2017-04-26 | 江西江特电气集团有限公司 | Method of frequency converter of simulating eddy current deceleration time |
| CN106599581B (en) * | 2016-12-15 | 2019-05-14 | 江西江特电气集团有限公司 | A kind of frequency converter simulation vortex deceleration time method |
| CN107461960A (en) * | 2017-07-27 | 2017-12-12 | 广东美的制冷设备有限公司 | Source pump and its energy-saving control method and control device |
| CN107461960B (en) * | 2017-07-27 | 2019-11-26 | 广东美的制冷设备有限公司 | Heat pump unit and its energy-saving control method and control device |
| CN109539464A (en) * | 2018-11-14 | 2019-03-29 | 海信（山东）空调有限公司 | Air conditioning control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104713201B (en) | 2017-08-15 |
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| CB02 | Change of applicant information |
Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant before: Ningbo AUX Electric Co., Ltd. |
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| GR01 | Patent grant |