CN102261720A - Control method for preventing overtemperature in center of condenser of direct current (DC) multi-frequency conversion outdoor machine during refrigeration - Google Patents
Control method for preventing overtemperature in center of condenser of direct current (DC) multi-frequency conversion outdoor machine during refrigeration Download PDFInfo
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- CN102261720A CN102261720A CN2011101713924A CN201110171392A CN102261720A CN 102261720 A CN102261720 A CN 102261720A CN 2011101713924 A CN2011101713924 A CN 2011101713924A CN 201110171392 A CN201110171392 A CN 201110171392A CN 102261720 A CN102261720 A CN 102261720A
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Abstract
The invention discloses a control method for preventing overtemperature in the center of a condenser of a direct current (DC) multi-frequency conversion outdoor machine during refrigeration. The control method comprises the following steps of: detecting the central temperature Tc of an outdoor condenser coil pipe; when the Tc is less than 59 DEG C and more than or equal to 57 DEG C, prohibiting a frequency-conversion pressing machine from frequency raising, and prohibiting a constant-frequency pressing machine from being started; when the Tc is less than 57 DEG C, making the frequency-conversion pressing machine quit from the protection; when the Tc is less than 62 DEG C and more than or equal to 59 DEG C, making the frequency-conversion pressing machine reduce the frequency at the rate of 0.8 to 1.2HZ/10s; when the Tc is less than 65 DEG C and more than or equal to 62 DEG C, making the frequency-conversion pressing machine reduce the frequency at the rate of 0.8 to 1.2HZ/s; when the frequency of the frequency-conversion pressing machine is reduced to the lowest frequency and the Tc which is less than 65 DEG C and more than or equal to 59 DEG C is maintained for more than 1min, stopping the constant-frequency pressing machine, and continuously operating the frequency-conversion pressing machine at the lowest frequency; when the Tc is more than or equal to 65 DEG C, immediately shutting down the frequency-conversion pressing machine and the constant-frequency pressing machine; and when the Tc is less than 57 DEG C and the downtime of the constant-frequency pressing machine is maintained for more than 3min, starting the constant-frequency pressing machine. The control method has the advantages of no hysteresis quality and stable systems, and makes compressors difficultly burned out.
Description
Technical field
The present invention relates to DC frequency-changing multi-online air-conditioning system technical field; it specifically is a kind of control method of multi-joint outer machine-processed protection when condenser middle part temperature (with condenser middle part temperature simulation high pressure) is too high when cold of DC frequency-changing; control of the present invention is only at the situation of outer machine frequency conversion press of the multi-joint machine of DC frequency-changing and the combination of fixed press frequently, i.e. the multi-joint outer machine-processed control method of the anti-overtemperature in condenser middle part when cold of DC frequency-changing.
Background technology
It much all is that frequency-changeable compressor and invariable frequency compressor are combined into an outer machine and use that DC frequency-changing multi-gang air-conditioner in the market has, as: there is 1 frequency conversion press to add the outer machine of a fixed press frequently combination, also has a frequency conversion press to add the outer machine of 2 fixed press frequently combination.This DC frequency-changing multi-gang air-conditioner is when system's refrigerating operaton; outdoor condenser is a high-pressure side; for guaranteeing the normal stable operation of system; outdoor condenser detects the pressure at outdoor coil pipe used middle part with pressure sensor during refrigeration, when detect pressure when higher system forbid raising frequency, frequency reducing, system-down protection earlier.But the price of pressure sensor is very high, and control is also comparatively complicated.Because the pressure and the temperature at the outdoor coil pipe used middle part of outdoor condenser are proportional during refrigeration; be that pressure is high more, temperature is also high more; so now most air-conditioner is used for protection system all with the temperature simulation high pressure of the outdoor relatively condenser of price middle part temperature sensor on the market.Again because the high pressure of temperature simulation exists hysteresis quality (promptly when pressure is very high; may detected temperature still be the preceding temperature of high pressure; thereby cause temperature to have the phenomenon that lags behind and embody with respect to pressure); therefore; the frequency reducing of taking in the time of may making protection or the time of shutdown are not very accurate, thereby cause system that bigger fluctuation is arranged.This fluctuation is just more obvious for the multi-joint machine of DC frequency-changing especially; because the outer machine of DC frequency-changing is frequency conversion press and the fixed combination of press frequently; because protection can cause deciding continuous, the frequent unlatching of frequency press and stop; so both influenced refrigeration; the instability that also can cause system, and the continuous unlatching of fixed press frequently, stop also to be easy to burn out compressor.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, a kind of hysteresis quality that do not have is provided, system stability, be not easy to burn out the multi-joint outer machine-processed control method of the anti-overtemperature in condenser middle part when cold of the DC frequency-changing of compressor.
In order to solve the problems of the technologies described above; the technical solution used in the present invention is: the multi-joint outer machine-processed control method of the anti-overtemperature in condenser middle part when cold of a kind of DC frequency-changing; it comes the too high a kind of control method of simulated high-pressure protection system high-pressure according to the coil pipe middle part temperature of outer machine condenser, and concrete steps are:
(1) the off-premises station master board is by the middle part temperature T c of the continuous sensing chamber of temperature sensor external condenser coil pipe;
(2) the too high protection value of affirmation system refrigeration middle part temperature, the protection value of system testing is controlled to be: 1) when 59 ℃＞Tc 〉=57 ℃, system's frequency conversion press is forbidden raising frequency, and fixed press is frequently forbidden opening; When 57 ℃＞Tc, the frequency conversion press withdraws from protection, recovers control automatically; 2) when 62 ℃＞Tc 〉=59 ℃, the frequency conversion press is with 0.8 ~ 1.2 HZ/10s frequency reducing at a slow speed, and when 65 ℃＞Tc 〉=62 ℃, the frequency conversion press is with the quick frequency reducing of the speed of 0.8 ~ 1.2HZ/s; 3) after the frequency conversion press drops to low-limit frequency, if satisfy 65 ℃＞Tc 〉=59 ℃ and duration greater than 1min, then stop to decide the frequency press, if the frequency press of deciding of this moment all stops (promptly not having fixed press frequently can stop), then the frequency conversion press is with the low-limit frequency continuous service; 4) when Tc 〉=65 ℃, system's frequency conversion press and fixed press frequently shut down immediately and do not allow operation; 5) when Tc＜57 ℃ and satisfy fixed press frequently continue downtime 3min when above surely frequently press just allow unlatching.
As preferably, 2 in the step (2)) when 62 ℃＞Tc 〉=59 ℃, the frequency conversion press is with 1 HZ/10s frequency reducing at a slow speed; When 65 ℃＞Tc 〉=62 ℃, the frequency conversion press is with the quick frequency reducing of the speed of 1 HZ/s.
Advantage of the present invention and beneficial effect:
1. the control method of the anti-overtemperature in the multi-joint outer machine-processed cold middle part of a kind of DC frequency-changing of the present invention can replace high-pressure sensor reliable protection system by outdoor condenser temperature; and can in the protection process, the reason owing to temperature lag pressure not cause system that bigger fluctuation is arranged, can not cause deciding that frequency press frequent start-stop in the protection process causes that compressor burns etc. yet.Therefore; both saved the higher pressure sensor of price; can effectively guarantee the continuous service that system is reliable and stable again, therefore, the present invention has very big use value for the system high pressure protection of the multi-joint machine of DC frequency-changing system (outer machine is frequency conversion press and the combination of fixed press frequently).
2. method control of the present invention is comparatively simple, and protection is reliable, does not need to use pressure sensor, greatly reduces cost, has guaranteed that unit moves when refrigeration reliably, has reduced the maintenance cost of unit greatly.
The specific embodiment
Below by embodiment the present invention is described in further detail, but the present invention not only is confined to following examples.
Present embodiment is the control method of the anti-overtemperature in the multi-joint outer machine-processed cold middle part of DC frequency-changing; it mainly is by condenser middle part temperature simulation high pressure in outdoor; realize the reliably protecting of system high pressure, remedy the method control system operation of press and frequency conversion press frequently surely of temperature lag high-pressure by the time.
Concrete steps:
1, the middle part temperature (Tc) of sensing chamber's external condenser coil pipe;
2, when 59 ℃＞Tc 〉=57 ℃, system's frequency conversion press is forbidden raising frequency, and decide frequency press if any what open this moment, will decide then frequently that press stops, and when 57 ℃＞Tc, the frequency conversion press withdraws from protection, recovers control automatically;
3, when 62 ℃＞Tc 〉=59 ℃, the frequency conversion press is with 1HZ/10s frequency reducing at a slow speed, and when 65 ℃＞Tc 〉=62 ℃, the frequency conversion press is with the quick frequency reducing of the speed of 1HZ/s;
4, after the frequency conversion press drops to low-limit frequency, if satisfy 65 ℃＞Tc 〉=59 ℃ and duration, then stop to decide the frequency press greater than 1min, if this moment, fixed press frequently can stop (promptly all fixed press frequently all stop), then the frequency conversion press moves with low-limit frequency;
5, when Tc 〉=65 ℃, system's frequency conversion press and fixed press frequently shut down immediately and do not allow operation;
6, when Tc＜57 ℃ and satisfy fixed press frequently continue downtime 3min when above surely frequently press just allow unlatching;
7, when the described situation of step (6) occurring, withdraw from protection control.
Can replace high-pressure sensor reliable protection system by outdoor condenser temperature by the foregoing description control method of the present invention as can be known; and can in the protection process, the reason owing to temperature lag pressure not cause system that bigger fluctuation is arranged, can not cause deciding frequency press frequent start-stop in the protection process yet.Can save the higher pressure sensor of price; can guarantee reliable, the stable operation of system again reliably; therefore, control method of the present invention has very big use value for the system high pressure protection of the multi-joint machine of DC frequency-changing system (outer machine is frequency conversion press and the combination of fixed press frequently).
Claims (2)
1. the multi-joint outer machine-processed control method of the anti-overtemperature in condenser middle part when cold of a DC frequency-changing, it is characterized in that: the concrete steps of this control method are:
(1) the off-premises station master board is by the middle part temperature T c of the continuous sensing chamber of temperature sensor external condenser coil pipe;
(2) the too high protection value of affirmation system refrigeration middle part temperature, the protection value of system testing is controlled to be: 1) when 59 ℃＞Tc 〉=57 ℃, system's frequency conversion press is forbidden raising frequency, and fixed press is frequently forbidden opening; When 57 ℃＞Tc, the frequency conversion press withdraws from protection, recovers control automatically; 2) when 62 ℃＞Tc 〉=59 ℃, the frequency conversion press is with 0.8 ~ 1.2 HZ/10s frequency reducing at a slow speed, and when 65 ℃＞Tc 〉=62 ℃, the frequency conversion press is with the quick frequency reducing of the speed of 0.8 ~ 1.2HZ/s; 3) after the frequency conversion press drops to low-limit frequency, if satisfy 65 ℃＞Tc 〉=59 ℃ and duration, then stop to decide the frequency press greater than 1min, if the frequency press of deciding of this moment all stops, then the frequency conversion press is with the low-limit frequency continuous service; 4) when Tc 〉=65 ℃, system's frequency conversion press and fixed press frequently shut down immediately and do not allow operation; 5) when Tc＜57 ℃ and satisfy fixed press frequently continue downtime 3min when above surely frequently press just allow unlatching.
2. the multi-joint outer machine-processed control method of the anti-overtemperature in condenser middle part when cold of DC frequency-changing according to claim 1 is characterized in that: 2 in the described step (2)) when 62 ℃＞Tc 〉=59 ℃, the frequency conversion press is with 1 HZ/10s frequency reducing at a slow speed; When 65 ℃＞Tc 〉=62 ℃, the frequency conversion press is with the quick frequency reducing of the speed of 1 HZ/s.
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| CN 201110171392 CN102261720B (en) | 2011-06-24 | 2011-06-24 | Control method for preventing overtemperature in center of condenser of direct current (DC) multi-frequency conversion outdoor machine during refrigeration |
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| CN106196476A (en) * | 2016-07-27 | 2016-12-07 | 青岛海尔空调器有限总公司 | Air-conditioning internal-external machine cleaning method |
| CN106403191A (en) * | 2016-09-30 | 2017-02-15 | 广东美的制冷设备有限公司 | Control method for air conditioner |
| CN107388490A (en) * | 2017-07-12 | 2017-11-24 | 青岛海尔空调器有限总公司 | Operation of air conditioner control method |
| CN107514734A (en) * | 2017-07-12 | 2017-12-26 | 青岛海尔空调器有限总公司 | Air-conditioning strength refrigeration control method |
| CN109210680A (en) * | 2018-08-17 | 2019-01-15 | 奥克斯空调股份有限公司 | A kind of air-conditioning fast-refrigerating, the control method of heat and air conditioner |
| CN109405168A (en) * | 2018-09-10 | 2019-03-01 | 青岛海尔空调器有限总公司 | Air conditioner and the control method for preventing the coil temperature of its indoor unit excessively high |
| CN109556308A (en) * | 2018-11-28 | 2019-04-02 | 宁波奥克斯电气股份有限公司 | A kind of control method and air conditioner of air source heat pump system air conditioner cold-starting |
| CN111121225A (en) * | 2019-12-30 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Fault detection method and device in high-voltage protection mode and air conditioner |
| CN111121245A (en) * | 2019-12-25 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Air conditioner control method |
| CN111271834A (en) * | 2019-05-28 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Frequency reduction control method of air conditioner and air conditioner |
| CN111397169A (en) * | 2020-03-27 | 2020-07-10 | 广东美的制冷设备有限公司 | Air conditioner frequency limiting method, air conditioner and storage medium |
| CN111622936A (en) * | 2020-04-25 | 2020-09-04 | 壹格建筑科技(上海)有限公司 | Method, apparatus and computer readable storage medium for compressor overload protection |
| CN112556222A (en) * | 2020-12-14 | 2021-03-26 | 珠海格力电器股份有限公司 | Marine air conditioner and seawater flow detection control method and device based on marine air conditioner |
| CN112944578A (en) * | 2021-03-18 | 2021-06-11 | 宁波奥克斯电气股份有限公司 | High-temperature refrigeration method and system for variable-frequency air conditioner and air conditioner |
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Cited By (20)
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| CN106196476A (en) * | 2016-07-27 | 2016-12-07 | 青岛海尔空调器有限总公司 | Air-conditioning internal-external machine cleaning method |
| CN106403191A (en) * | 2016-09-30 | 2017-02-15 | 广东美的制冷设备有限公司 | Control method for air conditioner |
| CN106403191B (en) * | 2016-09-30 | 2020-12-22 | 广东美的制冷设备有限公司 | Control method of air conditioner |
| WO2019011095A1 (en) * | 2017-07-12 | 2019-01-17 | 青岛海尔空调器有限总公司 | Operation control method for air conditioner |
| CN107514734A (en) * | 2017-07-12 | 2017-12-26 | 青岛海尔空调器有限总公司 | Air-conditioning strength refrigeration control method |
| CN107514734B (en) * | 2017-07-12 | 2019-09-03 | 青岛海尔空调器有限总公司 | Air-conditioning strength refrigeration control method |
| CN107388490B (en) * | 2017-07-12 | 2021-05-28 | 青岛海尔空调器有限总公司 | Air conditioner operation control method |
| CN107388490A (en) * | 2017-07-12 | 2017-11-24 | 青岛海尔空调器有限总公司 | Operation of air conditioner control method |
| CN109210680A (en) * | 2018-08-17 | 2019-01-15 | 奥克斯空调股份有限公司 | A kind of air-conditioning fast-refrigerating, the control method of heat and air conditioner |
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| CN109556308A (en) * | 2018-11-28 | 2019-04-02 | 宁波奥克斯电气股份有限公司 | A kind of control method and air conditioner of air source heat pump system air conditioner cold-starting |
| CN111271834A (en) * | 2019-05-28 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Frequency reduction control method of air conditioner and air conditioner |
| CN111121245B (en) * | 2019-12-25 | 2021-01-15 | 宁波奥克斯电气股份有限公司 | Air conditioner control method |
| CN111121245A (en) * | 2019-12-25 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Air conditioner control method |
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| CN111397169A (en) * | 2020-03-27 | 2020-07-10 | 广东美的制冷设备有限公司 | Air conditioner frequency limiting method, air conditioner and storage medium |
| CN111622936A (en) * | 2020-04-25 | 2020-09-04 | 壹格建筑科技(上海)有限公司 | Method, apparatus and computer readable storage medium for compressor overload protection |
| CN112556222A (en) * | 2020-12-14 | 2021-03-26 | 珠海格力电器股份有限公司 | Marine air conditioner and seawater flow detection control method and device based on marine air conditioner |
| CN112944578A (en) * | 2021-03-18 | 2021-06-11 | 宁波奥克斯电气股份有限公司 | High-temperature refrigeration method and system for variable-frequency air conditioner and air conditioner |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |