CN1888662A - Central air conditioner variable frequency compressor preheating operation controlling method - Google Patents
Central air conditioner variable frequency compressor preheating operation controlling method Download PDFInfo
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- CN1888662A CN1888662A CN 200510014036 CN200510014036A CN1888662A CN 1888662 A CN1888662 A CN 1888662A CN 200510014036 CN200510014036 CN 200510014036 CN 200510014036 A CN200510014036 A CN 200510014036A CN 1888662 A CN1888662 A CN 1888662A
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Abstract
This invention discloses a kind of central air conditioner frequency conversion compressor preheating operation controlling method. It includes: whether environment needs to preheat is judged; after the measured outdoor temperatures are divided according to each section, preheating operation is carried out under low frequency according to different time of each segment. The said environment judging step is behind measuring outdoor temperature, compressor outlet pipe temperature and heat liberation temperature. Whether these measured values are smaller than the set temperature in the controlling part is judged. This invention can avoid noise generated from high frequency working of relay element when carrying out preheating operation.
Description
Technical field
The present invention relates to a kind of central air-conditioning.Particularly relating to a kind of is when driving frequency-changeable compressor under the condition of utmost point low-temperature condition in outdoor temperature, the central air-conditioning variable frequency compressor preheating operation controlling method that carries out preheating with low frequency in advance.
Background technology
Air-conditioning is arranged on spaces such as room, room, office or business shop, and temperature, humidity, dustiness and the air-flow of room air are regulated, and forms pleasant environment.Air-conditioning can be divided into a bodily form substantially and divide the bodily form.
One bodily form and the branch bodily form have identical functions, and a bodily form air-conditioning integrates body to the function of cooling heat release, is placed on wall perforating place or the window.Divide the bodily form air-conditioning cooling device to be set, and compression set is set, connect two devices that are separated from each other by the refrigerant pipe in the outside in the indoor.
Usually corresponding to an indoor set off-premises station is set.But when having a plurality of room, adopt the words of said structure that corresponding with the indoor set in each room respectively a plurality of off-premises stations need be set.Not only influence architectural appearance, and cost of idleness, and take very big space.
Therefore, developing and to be connected on many indoor sets with an off-premises station, simultaneously the central air-conditioning that each room is freezed, heats.
Fig. 1 is the refrigerant loop block diagram of common air-conditioning.
Central air-conditioning has and is arranged on indoor indoor unit 10 and is arranged on outdoor outdoor unit 1.Indoor unit 10 has the refrigeration of execution, several indoor heat converter 11a, 11b of heat-production functions, 11c.
Outdoor unit 1 has frequency-changeable compressor 2 and constant speed compressor 3 that refrigerant is compressed, allow the outdoor heat converter 5 of refrigerant heat release of compression and the rear that is arranged on outdoor heat converter 5, promotes the cooling fan 6 of refrigerant heat release.
Refrigerant flow direction during with refrigerating operaton is as the criterion, and the below that the below of outdoor heat converter 5 is provided with main electromagnetic expanding valve 12, main electromagnetic expanding valve 12 is provided with inferior electromagnetic expanding valve 13a, 13b, the 13c that allows refrigerant obtain puffing before flowing into respective chambers heat exchanger 11a, 11b, 11c.Each outlet side of indoor heat converter 11a, 11b, 11c is provided with the 1st temperature detecting sensor 15a, 15b, the 15c of the refrigerant temperature of can perception discharging from indoor heat converter 11a, 11b, 11c.
In addition, constant speed compressor 3 and frequency-changeable compressor 2 have with the maximum refrigeration of indoor unit respectively, heat load 50% corresponding compressed capability, and each discharged side before refrigerant inflow outdoor heat exchanger 5, joined mutually.In this junction field, be provided with the 2nd temperature detecting sensor 4, the refrigerant temperature that compressor 2,3 is discharged carries out perception.
Below, central air conditioner refrigerating process is described.
The HTHP gaseous coolant of compressor 2,3 compression, by cross valve (figure slightly) water conservancy diversion behind outdoor heat converter 5.In the process that flows through outdoor heat converter 5, be condensed into the cryogenic high pressure liquid refrigerants.From the cryogenic high pressure liquid refrigerants that outdoor heat converter 5 flows out, flow into main electromagnetic expanding valve 12 after, be transformed into low-temp low-pressure state, inflow indoor heat exchanger 11a, 11b, 11c when flowing through time electromagnetic expanding valve 13a, 13b, 13c.The refrigerant that flows into is evaporated into gaseous coolant, by the suction side of cross valve (figure slightly) water conservancy diversion to compressor 2,3.
Flow through the refrigerant of indoor heat converter 11a, 11b, 11c, from the absorption of air heat, evaporate, along with carrying out kind of refrigeration cycle repeatedly, the temperature of the interior space is gradually reduced.
Compare with the common air-conditioning that is connected an indoor set on the off-premises station, central air-conditioning can utilize an off-premises station simultaneously a plurality of rooms to be freezed, heat, and its power consumption, expense and aspect, space all have advantage.
When driving central air-conditioning under utmost point low-temperature condition, because the lubricating oil viscosity of compressor inside is very high, compressor is inner during the rotor rotation very big frictional force, the damage that produces compressor can occur.As a result, the locking state of compressor might occur, can not drive.Therefore be under the utmost point cryogenic conditions during drive compression machine in outdoor temperature, need carry out warm, so that improve the lubricating oil viscosity of compressor inside.
Usually, be supplied to the AC power of compressor coil, allow coil under the state that compressor drum stops, only generating heat, carry out compressor preheating with this by control.That is,, connect alternating current, make at compressor and do not discharge under the state of HTHP refrigerant, only allow coil heating to the compressor coil to allow the frequency-changeable compressor rotor keep the mode stop.The heat that coil produces improves the temperature of compressor internal lubrication oil, can reduce friction, and prevents the wearing and tearing that bring thus.
But there are the following problems for conventional art.Because adopt high frequency during pre-thermocompressor, the relay element that its converter section drives can produce noise because of high-frequency work (connect, disconnect).Thereby bring uncomfortable to the user.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and can carry out the central air-conditioning variable frequency compressor preheating operation controlling method of compressor preheating not connecting, disconnect under the situation of the noise that causes by high frequency.
The technical solution adopted in the present invention is: a kind of central air-conditioning variable frequency compressor preheating operation controlling method includes: whether environment is needed to carry out the stage that the environment of preheating operation is judged; The outdoor temperature of measuring, after each section division,, carry out the stage of preheating operation with low frequency with the different time of each section.
It is described that whether environment is needed to carry out the stage that the environment of preheating operation judges is after measuring outdoor temperature, compressor discharge line temperature and heat sink temperature, to these measured values is less than the temperature value that is set in control part, the stage of judging.
When carrying out preheating operation, the aperture of electromagnetic expanding valve maintains target aperture * 0.7.
Central air-conditioning variable frequency compressor preheating operation controlling method of the present invention when carrying out preheating operation, allows frequency-changeable compressor carry out work with low frequency, can eliminate in the conventional art because the noise that the relay element high-frequency work is produced during preheating operation.
In addition, by outdoor temperature being belonged to each section, and carry out preheating operation with the different time, can change, suitably regulate the preheating operation time by outdoor temperature by each section.
Description of drawings
Fig. 1 is the structured flowchart in common air-conditioning refrigerant loop;
Fig. 2 is the control block diagram of air-conditioning variable frequency compressor preheating operation;
Fig. 3 is a central air-conditioning variable frequency compressor preheating operation controlling method flow chart of the present invention;
Fig. 4 is the preheating operation time relationship table relevant with outdoor temperature;
The frequency-changeable compressor frequency change schematic diagram relevant when Fig. 5 is preheating operation with the time;
Fig. 6 is that electromagnetic expanding valve aperture relevant with the time when carrying out preheating operation changes schematic diagram.
Wherein:
100: control part 110: the heat sink temperature sensor
120: compressor discharge line temperature sensor 130: outdoor temperature sensor
140: frequency-changeable compressor 150: constant speed compressor
The specific embodiment
Below, with reference to accompanying drawing, central air-conditioning variable frequency compressor preheating operation controlling method of the present invention is elaborated.
Fig. 2 is the control block diagram of air-conditioning variable frequency compressor preheating operation; Fig. 3 is a central air-conditioning variable frequency compressor preheating operation controlling method flow chart of the present invention.
Air-conditioning of the present invention has outdoor temperature sensor 130, compressor discharge line temperature sensor 120, heat sink temperature sensor 110.Outdoor temperature sensor 130, compressor discharge line temperature sensor 120, heat sink temperature sensor 110 are employed the determinator of whether carrying out preheating operation and judging as the driving initial stage respectively.Outdoor temperature sensor 130, compressor discharge line temperature sensor 120, heat sink temperature sensor 110 are electrically connected with the control part 100 of air-conditioning.Control part 100 is analyzed these values after reading in measured value from each temperature sensor, and controls frequency-changeable compressor 140 and constant speed compressor 150 with this.
In addition, when outdoor temperature is utmost point low temperature,, before the drive compression machine, need carry out the compressor preheating process,, reduce its viscosity so that improve the temperature of compressor internal lubrication oil for the driven compressor.
The present invention, before the driven compressor, after outdoor temperature, compressor discharge line temperature and heat sink temperature measured, if these measured values are less than the design temperature of control part, then be judged as the state that environment is in needs to carry out preheating operation, allow compressor carry out work with preheating mode.
The outdoor temperature of measuring, be classified as each section after, by each section, adopt different preheating time.Such as, if outdoor temperature is greater than-5 ℃,, then carry out " A " minute less than 0 ℃, such as about 1 minute 30 seconds preheating operations, if outdoor temperature is greater than-10 ℃,, then carry out " B " minute less than-5 ℃, such as about 3 minutes preheating operations, if outdoor temperature, was then carried out " C " minute less than-10 ℃, such as about 5 minutes preheating operations.This be because, outdoor temperature is low more, the lubricating oil viscosity of compressor inside is high more.In order to allow compressor carry out work with good state, need carry out preheating operation with the longer time, allow lubricating oil viscosity be improved fully.
When carrying out preheating operation, the frequency of frequency-changeable compressor is controlled as lower frequency.Such as 15Hz.This is the noise that produces when carrying out preheating operation in the conventional art in order to eliminate.The present invention allows compressor carry out preheating operation with low frequency, can eliminate in the conventional art because the noise that the relay high-frequency work causes.
In the conventional art, allowing compressor drum keep carrying out preheating operation under the static state, the refrigerant that does not exist compressor to discharge in preheating operation carries out preheating operation but allow among the present invention when compressor drum is slow to be moved, and makes compressor discharge a small amount of refrigerant.Thereby the present invention allows the aperture of electromagnetic expanding valve (LEV) remain on aperture less than the target aperture, such as about about 70% (that is, target aperture * 0.7), allows a small amount of refrigerant of discharging when carrying out preheating operation flow into indoor set.
Below, with reference to accompanying drawing 3, compressor preheating operation controlling method of the present invention is elaborated.
The user allows air-conditioning begin empty do (S100 stage) by operating air conditioner key input part (figure slightly).At this moment, the control part of air-conditioning (Fig. 2 100) reads in the temperature value of mensuration from outdoor temperature sensor 130, compressor discharge line temperature sensor 120 and heat sink temperature sensor 110.
Afterwards, whether 100 pairs of each measured values of control part are judged less than set temperature value T1 ℃, T2 ℃, T3 ℃, if be judged as outdoor temperature, compressor discharge line temperature and heat sink temperature respectively less than T1 ℃, T2 ℃, T3 ℃, then be judged as current environment and be in the state that need allow air-conditioning carry out preheating operation, allow compressor prepare to enter preheating mode (S110 stage).Here, as one embodiment of the invention, T1 ℃, T2 ℃, T ℃ all is 0 ℃.
The outdoor temperature value of measuring when outdoor temperature sensor is in " first " scope, such as greater than-5 ℃ during less than 0 ℃ (S120 stage), control part 100 allows compressor carry out " A " minute, such as about 1 minute 30 seconds low-frequency operation, such as 15Hz preheating (S130 stage).At this moment, when frequency-changeable compressor carried out pre-hot work with low frequency, electromagnetic expanding valve LEV was open with the aperture that is lower than the target aperture, and is open such as the aperture with " target aperture * 0.7 ".This is in order to allow a spot of refrigerant flow into indoor set in preheating operation.
S130 is in the stage, carry out " A " minute preheating after, control part 100 allows compressor finish preheating operation, and starts compressor, makes it to carry out driven (S140 stage).
S120 is in the stage, if the outdoor temperature value is not in " first " section, then whether the outdoor temperature value that outdoor temperature sensor is measured is in " second " scope, such as whether greater than-10 ℃ less than-5 ℃, judge that if be in " second " scope (S150 stage), then control part 100 allows compressor carry out " B " minute, such as about 3 minutes low-frequency operation, such as 15Hz preheating (S160 stage).At this moment, electromagnetic expanding valve LEV is the same with the S130 stage, and is open with the aperture that is lower than the target aperture.
S150 is in the stage, if the outdoor temperature value is not in " second " section, then whether the outdoor temperature value that outdoor temperature sensor is measured is in " third " scope, such as whether less than-10 ℃, judge that if be in " third " scope (S170 stage), then control part 100 allows compressor carry out " C " minute, such as about 5 minutes low frequency, such as 15Hz preheating (S180 stage).At this moment, electromagnetic expanding valve LEV is also open with the aperture that is lower than the target aperture.
At last, at S160 stage or S180 in the stage, respectively with " B " minute, after " C " minute carried out preheating, control part 100 stopped the preheating operation of compressor, and starts compressor, makes it to carry out driven (S140 stage).
The present invention carries out preheating operation according to outdoor temperature with the different time, and allows frequency-changeable compressor carry out work with low frequency when preheating, can suitably regulate the preheating operation time by the variation of outdoor temperature, can eliminate the abnormal sound that produces in the conventional art.
Fig. 4 is the preheating operation time relationship table relevant with outdoor temperature; The frequency-changeable compressor frequency change schematic diagram relevant when Fig. 5 is preheating operation with the time; Fig. 6 is that electromagnetic expanding valve aperture relevant with the time when carrying out preheating operation changes schematic diagram.
As shown in Figure 4, the preheating operation time of frequency-changeable compressor of the present invention is, when outdoor temperature is 1 minute 30 seconds greater than-5 ℃ during less than 0 ℃; When outdoor temperature is 3 minutes greater than-10 ℃ during less than-5 ℃; When outdoor temperature is 5 minutes during less than-10 ℃.
The (a) and (b) of Fig. 5 and (c) be respectively with the time relevant frequency-changeable compressor frequency change schematic diagram of outdoor temperature when being in " first " section, " second " section, " third " section respectively.The (a) and (b) of Fig. 6 and (c) be respectively with the time relevant electromagnetic expanding valve aperture of outdoor temperature when being in " first " section, " second " section, " third " section respectively and change schematic diagram.
As Fig. 5, shown in Figure 6, the running frequency of frequency-changeable compressor is 15Hz when preheating operation, becomes when enabling operation suitably in the frequency that drives operation and enter after the preheating operation end.And the aperture of electromagnetic expanding valve is about 70% (target aperture * 0.7) of target aperture when preheating operation, enters to become when enabling operation suitably in the aperture that drives operation after preheating operation finishes.Why allowing the aperture of electromagnetic expanding valve be lower than the target aperture, is because the coolant quantity that the coolant quantity that compressor is discharged during preheating operation is discharged when significantly being lower than the compressor operate as normal will allow the aperture of electromagnetic expanding valve conform to it.Therefore the aperture of electromagnetic expanding valve is not that to be fixed on target aperture * 0.7 value constant, but can carry out suitable change by the coolant quantity of compressor discharge.
Claims (3)
1. a central air-conditioning variable frequency compressor preheating operation controlling method is characterized in that, includes: whether environment is needed to carry out the stage that the environment of preheating operation is judged; The outdoor temperature of measuring, after each section division,, carry out the stage of preheating operation with low frequency with the different time of each section.
2. central air-conditioning variable frequency compressor preheating operation controlling method according to claim 1, it is characterized in that, whether environment is needed to carry out the stage that the environment of preheating operation judges is after measuring outdoor temperature, compressor discharge line temperature and heat sink temperature, to these measured values is less than the temperature value that is set in control part, the stage of judging.
3. central air-conditioning variable frequency compressor preheating operation controlling method according to claim 1 is characterized in that, when carrying out preheating operation, the aperture of electromagnetic expanding valve maintains target aperture * 0.7.
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| CN 200510014036 CN1888662A (en) | 2005-06-28 | 2005-06-28 | Central air conditioner variable frequency compressor preheating operation controlling method |
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| CN 200510014036 CN1888662A (en) | 2005-06-28 | 2005-06-28 | Central air conditioner variable frequency compressor preheating operation controlling method |
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| CN101968241A (en) * | 2010-09-30 | 2011-02-09 | 广东美的电器股份有限公司 | Air-conditioner using combustible refrigerant and control method thereof |
| CN103075324A (en) * | 2012-03-21 | 2013-05-01 | 宁波奥克斯电气有限公司 | Control method of oil temperature of compressor |
| CN103090506A (en) * | 2013-01-27 | 2013-05-08 | 宁波奥克斯空调有限公司 | Control method of variable frequency air conditioner at night |
| CN103185383A (en) * | 2011-12-29 | 2013-07-03 | 松下电器产业株式会社 | Control method of air conditioner |
| CN104165441A (en) * | 2014-08-07 | 2014-11-26 | 四川长虹电器股份有限公司 | Air conditioner and method for starting same |
| CN105004008A (en) * | 2015-07-20 | 2015-10-28 | 广东美的暖通设备有限公司 | Low-temperature start control method and system for frequency conversion air conditioner and air conditioner |
| CN105091251A (en) * | 2015-09-18 | 2015-11-25 | 广东美的制冷设备有限公司 | Controlling method and controlling device for variable-frequency air conditioner |
| CN103185383B (en) * | 2011-12-29 | 2016-12-14 | 松下电器产业株式会社 | The control method of air-conditioning |
| CN106288200A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN107726557A (en) * | 2017-09-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | The control method and system of air-conditioning under low temperature and high relative humidity heating condition |
| CN107726556A (en) * | 2017-09-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | The control method and system of air-conditioning under low temperature and high relative humidity heating condition |
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| CN109579229A (en) * | 2018-10-30 | 2019-04-05 | 青岛海信日立空调系统有限公司 | A kind of air conditioner compressor preheating control method and air conditioner |
| CN110594994A (en) * | 2019-09-10 | 2019-12-20 | 宁波奥克斯电气股份有限公司 | Control method and control device for heating and temperature control mode of air conditioner and air conditioner |
| CN112728725A (en) * | 2021-01-22 | 2021-04-30 | 珠海格力节能环保制冷技术研究中心有限公司 | Control device and method of compressor and air conditioner |
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2005
- 2005-06-28 CN CN 200510014036 patent/CN1888662A/en active Pending
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| CN101968241A (en) * | 2010-09-30 | 2011-02-09 | 广东美的电器股份有限公司 | Air-conditioner using combustible refrigerant and control method thereof |
| CN103185383B (en) * | 2011-12-29 | 2016-12-14 | 松下电器产业株式会社 | The control method of air-conditioning |
| CN103185383A (en) * | 2011-12-29 | 2013-07-03 | 松下电器产业株式会社 | Control method of air conditioner |
| CN103075324A (en) * | 2012-03-21 | 2013-05-01 | 宁波奥克斯电气有限公司 | Control method of oil temperature of compressor |
| CN103075324B (en) * | 2012-03-21 | 2015-06-17 | 宁波奥克斯电气有限公司 | Control method of oil temperature of compressor |
| CN103090506A (en) * | 2013-01-27 | 2013-05-08 | 宁波奥克斯空调有限公司 | Control method of variable frequency air conditioner at night |
| CN104165441A (en) * | 2014-08-07 | 2014-11-26 | 四川长虹电器股份有限公司 | Air conditioner and method for starting same |
| CN105004008A (en) * | 2015-07-20 | 2015-10-28 | 广东美的暖通设备有限公司 | Low-temperature start control method and system for frequency conversion air conditioner and air conditioner |
| CN105004008B (en) * | 2015-07-20 | 2017-09-12 | 广东美的暖通设备有限公司 | Convertible frequency air-conditioner low-temperature starting control method, control system and its air conditioner |
| CN105091251A (en) * | 2015-09-18 | 2015-11-25 | 广东美的制冷设备有限公司 | Controlling method and controlling device for variable-frequency air conditioner |
| CN105091251B (en) * | 2015-09-18 | 2018-02-06 | 广东美的制冷设备有限公司 | The control method and control device of transducer air conditioning |
| CN106288200A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN106288200B (en) * | 2016-08-19 | 2019-08-09 | 芜湖美智空调设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| WO2018219135A1 (en) * | 2017-05-31 | 2018-12-06 | 青岛海尔空调器有限总公司 | Control method for reducing compressor preheating noise |
| CN107726557A (en) * | 2017-09-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | The control method and system of air-conditioning under low temperature and high relative humidity heating condition |
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| CN107726557B (en) * | 2017-09-22 | 2020-11-03 | 青岛海尔空调器有限总公司 | Control method and system of air conditioner under low-temperature high-humidity heating working condition |
| CN109579229A (en) * | 2018-10-30 | 2019-04-05 | 青岛海信日立空调系统有限公司 | A kind of air conditioner compressor preheating control method and air conditioner |
| CN110594994A (en) * | 2019-09-10 | 2019-12-20 | 宁波奥克斯电气股份有限公司 | Control method and control device for heating and temperature control mode of air conditioner and air conditioner |
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| CN113154647A (en) * | 2021-02-07 | 2021-07-23 | 青岛海尔空调器有限总公司 | Preheating control method for compressor |
| CN113154647B (en) * | 2021-02-07 | 2023-02-17 | 青岛海尔空调器有限总公司 | Preheating control method for compressor |
| CN114659239A (en) * | 2022-03-25 | 2022-06-24 | 青岛海尔空调器有限总公司 | Control method and control system for air conditioner preheating, electronic equipment and storage medium |
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Open date: 20070103 |