CN102486333A - Air-conditioning system and method for judging length of connecting pipe of indoor unit and outdoor unit - Google Patents
Air-conditioning system and method for judging length of connecting pipe of indoor unit and outdoor unit Download PDFInfo
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- CN102486333A CN102486333A CN2010105694241A CN201010569424A CN102486333A CN 102486333 A CN102486333 A CN 102486333A CN 2010105694241 A CN2010105694241 A CN 2010105694241A CN 201010569424 A CN201010569424 A CN 201010569424A CN 102486333 A CN102486333 A CN 102486333A
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Abstract
The invention discloses an air-conditioning system and a method for judging the length of a connecting pipe of an indoor unit and an outdoor unit. The method for judging the length of the connecting pipe of the indoor unit and the outdoor unit in the air-conditioning system comprises: detecting the inlet temperature of an evaporator; detecting the saturation temperature corresponding to the inlet pressure of a compressor; and judging the length of the connecting pipe of the indoor unit and the outdoor unit in the air-conditioning system according to the difference between the inlet temperature of the evaporator and the saturation temperature corresponding to the inlet pressure of the compressor, wherein the corresponding relationship between the temperature difference and the length of the connecting pipe of the indoor unit and the outdoor unit is pre-stored in the air-conditioning system, and the length of the connecting pipe of the indoor unit and the outdoor unit can be measured through measuring the temperature difference. Therefore, the length of the connecting pipe of the indoor unit and the outdoor unit of the air-conditioning system can be measured conveniently.
Description
Technical field
The present invention relates to field of air conditioning, in particular to the length determination methods of a kind of air-conditioning system and indoor and outdoor machine tube connector thereof.
Background technology
Usually, directly the vaporation-type refrigerated air-conditioning system is made up of off-premises station and indoor set, connects through connecting line.Receive air-conditioning unit erecting bed condition restriction, connecting line length has uncertainty.The length of tube connector affects refrigerant perfused amount, and simultaneously the refrigerant friction loss that tube connector brings of flowing through can make the refrigerating capacity of air-conditioning unit descend.Connecting line is long more, and drag losses is big more, and refrigerating capacity descends big more.Particularly, after the pipe range factor brings refrigerating capacity to descend, certainly will require off-premises station to carry out Intelligent Measurement and running reply, to obtain the due refrigerating capacity of indoor set to variable refrigerant volume system (VRF).
Problem to the length more complicated of the indoor and outdoor machine tube connector of air-conditioning system in the correlation technique does not propose effective solution at present as yet.
Summary of the invention
To the problem of the length more complicated of the indoor and outdoor machine tube connector of air-conditioning system in the correlation technique and propose the present invention; For this reason; Main purpose of the present invention is to provide the length determination methods of a kind of air-conditioning system and indoor and outdoor machine tube connector thereof, to address the above problem.
To achieve these goals, according to an aspect of the present invention, the determination methods of indoor and outdoor machine tube connector length in a kind of air-conditioning system is provided.The determination methods of indoor and outdoor machine tube connector length comprises in this air-conditioning system: detect the evaporator temperature; Detect the corresponding saturation temperature of compressor inlet pressure; Temperature gap according to the corresponding saturation temperature of evaporator temperature and compressor inlet pressure is judged indoor and outdoor machine tube connector length in the air-conditioning system, wherein, in air-conditioning system, prestores the corresponding relation of temperature gap and indoor and outdoor machine tube connector length.
Further, detecting the corresponding saturation temperature of compressor inlet pressure comprises: the inlet pressure value that detects compressor; Obtain the corresponding saturation temperature of inlet pressure value of compressor.
Further, temperature gap with the corresponding relation of indoor and outdoor machine tube connector length is: unit length connects the corresponding temperature difference of pipe range.
Further; Judging according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure in the air-conditioning system before the indoor and outdoor machine tube connector length; Also comprise: obtain unit length and connect the corresponding temperature difference of pipe range; Obtaining the corresponding temperature difference of unit length connection pipe range comprises: detect evaporator temperature and the corresponding saturation temperature of compressor inlet pressure in the known air-conditioning system, wherein, the indoor and outdoor machine tube connector length in the said known air-conditioning system is known; Obtain the temperature difference that said unit length is connected the pipe range correspondence according to a plurality of indoor and outdoor machine tube connector length in the said known air-conditioning system and a plurality of evaporator temperature in the said known air-conditioning system with the corresponding saturation temperature of compressor inlet pressure; Each unit length in the said known air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain the corresponding temperature difference of unit length connection pipe range in the said known air-conditioning system.
Further, known air-conditioning system is a plurality of, and the tube connector length in these a plurality of air-conditioning systems is different, obtains the corresponding temperature difference of unit length connection pipe range and comprises: obtain the corresponding temperature difference of unit length connection pipe range in each known air-conditioning system respectively; Unit length in each known air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain unit length and connect the corresponding temperature difference of pipe range.
Further; Also comprise: the operational factor and the flow-control of off-premises station are revised after the indoor and outdoor machine tube connector length judging according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure in the air-conditioning system according to indoor and outdoor machine tube connector length.
To achieve these goals, according to a further aspect in the invention, a kind of air-conditioning system is provided.Evaporimeter; Temperature sensor is arranged at the import department of evaporimeter, is used to detect the evaporator temperature; Compressor; Pressure sensor is arranged at the porch of compressor, is used to detect the pressure at place, suction port of compressor; Controller; Be used for the corresponding saturation temperature of detected pressures; And judge indoor and outdoor machine tube connector length in the air-conditioning system according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure; Wherein, in air-conditioning system, prestore the corresponding relation of temperature gap and indoor and outdoor machine tube connector length.
Further, controller also is used for according to indoor and outdoor machine tube connector length the operational factor and the flow-control of off-premises station being revised.
Through the present invention, adopt and detect the evaporator temperature; Detect the corresponding saturation temperature of compressor inlet pressure; Temperature gap according to the corresponding saturation temperature of evaporator temperature and compressor inlet pressure is judged indoor and outdoor machine tube connector length in the air-conditioning system; Wherein, In air-conditioning system, prestore the corresponding relation of temperature gap and indoor and outdoor machine tube connector length; Can adopt the mode of side temperature difference to survey the tube connector length of indoor and outdoor machine; Solved the problem of the length more complicated of the indoor and outdoor machine tube connector of air-conditioning system in the correlation technique, and then reached easily the length of the indoor and outdoor machine tube connector of air-conditioning system is carried out measured effect.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the annexation of the air-conditioning system of the embodiment of the invention; And
Fig. 2 is the sketch map of the pressure of each point as shown in Figure 1.
The specific embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 1 is the sketch map according to the annexation of the air-conditioning system of the embodiment of the invention.
As shown in Figure 1, this air-conditioning system comprises: evaporimeter; Temperature sensor is arranged at the import department of evaporimeter, is used to detect the evaporator temperature; Compressor; Pressure sensor is arranged at the porch of compressor, is used to detect the pressure at place, suction port of compressor; Controller; Be used for the corresponding saturation temperature of detected pressures; And judge indoor and outdoor machine tube connector length in the air-conditioning system according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure; Wherein, in air-conditioning system, prestore the corresponding relation of temperature gap and indoor and outdoor machine tube connector length.
Preferably, controller can also be used for according to indoor and outdoor machine tube connector length the operational factor and the flow-control of off-premises station being revised.
The embodiment of the invention also provides the determination methods of indoor and outdoor machine tube connector length in a kind of air-conditioning system.Wherein, this determination methods comprises: detect the evaporator temperature; Detect the corresponding saturation temperature of compressor inlet pressure; Temperature gap according to the corresponding saturation temperature of evaporator temperature and compressor inlet pressure is judged indoor and outdoor machine tube connector length in the air-conditioning system, wherein, in air-conditioning system, prestores the corresponding relation of temperature gap and indoor and outdoor machine tube connector length.
Preferably, detecting the corresponding saturation temperature of compressor inlet pressure comprises: the inlet pressure value that detects compressor; Obtain the corresponding saturation temperature of inlet pressure value of compressor.
Preferably, temperature gap with the corresponding relation of indoor and outdoor machine tube connector length is: unit length connects the corresponding temperature difference of pipe range.
Preferably; Judging according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure in the air-conditioning system before the indoor and outdoor machine tube connector length; Also comprise: obtain unit length and connect the corresponding temperature difference of pipe range; Obtaining the corresponding temperature difference of unit length connection pipe range comprises: detect evaporator temperature and the corresponding saturation temperature of compressor inlet pressure in the known air-conditioning system, wherein, a plurality of indoor and outdoor machine tube connector length in the air-conditioning system are known; Obtain the temperature difference that unit length is connected the pipe range correspondence according to a plurality of indoor and outdoor machine tube connector length in the known air-conditioning system and a plurality of evaporator temperature in the air-conditioning system with the corresponding saturation temperature of compressor inlet pressure; Each unit length in the air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain said unit length and connect the corresponding temperature difference of pipe range.
Preferably, known air-conditioning system is a plurality of, and the tube connector length in these a plurality of air-conditioning systems is different, obtains the corresponding temperature difference of unit length connection pipe range and comprises: obtain the corresponding temperature difference of unit length connection pipe range in each air-conditioning system respectively; Unit length in each air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain unit length and connect the corresponding temperature difference of pipe range.
Can find out from above embodiment; The present invention can Intelligent Measurement goes out in the air-conditioning system control method of tube connector equivalent length between indoor unit and outdoor unit; Use this equivalent pipe range parameter, can revise off-premises station running and flow-control, to obtain the due refrigerating capacity of indoor set.
Preferably; Also comprise: the operational factor and the flow-control of off-premises station are revised after the indoor and outdoor machine tube connector length judging according to the temperature gap of the corresponding saturation temperature of evaporator temperature and compressor inlet pressure in the air-conditioning system according to indoor and outdoor machine tube connector length.Owing to tube connector length between indoor unit and outdoor unit in the air-conditioning system is long more, the loss on the tube connector is big more, thereby causes refrigerating capacity to descend.Need revise the control (comprising compressor frequency and flow etc.) of off-premises station for ability is not descended, make indoor set can obtain enough abilities.And the correction of off-premises station is needed at first tube connector length to be judged.The present invention promptly can judge tube connector length, for example, comes the size of decision-making ability loss through the difference size of the corresponding saturation temperature of evaporator temperature and pressure of inspiration(Pi).
As shown in Figure 1, on direct vaporation-type cooling cycle system, form by off-premises station, indoor set, connecting line.Behind restricting element, before the evaporimeter, place the bulb that detects evaporating temperature and detect evaporating temperature T1; In the compressor of outdoor unit porch, be designed with pressure sensor, detect pressure of inspiration(Pi) P1; Converse the corresponding saturation temperature T2 of pressure of inspiration(Pi) according to P1, like figure below.
In connecting line, get a plurality of points 1,2,3,4,5 and 6 successively.
Fig. 2 is the sketch map of the pressure of each point as shown in Figure 1.In the figure, 1 to 6 six some sample point 1,2,3,4,5 in the corresponding connecting line and pressure enthalpy state of 6 respectively.
Place bulb at evaporator and detect evaporator evaporation temperature T 1, the placement force sensor detects pressure of inspiration(Pi) before the compressor of outdoor unit air entry, converses the corresponding saturation temperature T2 of pressure of inspiration(Pi) according to pressure of inspiration(Pi); The temperature difference of T1-T2 can characterize evaporating pressure and pressure of inspiration(Pi) is poor, and this pressure differential (P6-P1 among the figure) connects the drag losses that pipe range brings.
After drawing temperature difference (T1-T2), be that unit connects the corresponding evaporation temperature difference of pipe range according to different system definition a, unit is ℃/m, thus, (T1-T2)/a draws tube connector equivalent length between the indoor and outdoor unit.
Below introduce the acquisition methods that each unit connects the corresponding evaporation temperature difference of pipe range for example.
To specifying refrigeration working medium, caliber designs by certain flow rate, supposes that the cold-producing medium parameter is certain, and this moment, friction loss only had relation with tube connector.As briefly explain and verify reasoning below the said design.In the experiment, but the setup parameter term harmonization only changes unit low pressure vapour side tube connector length, and different T2, T1, the P1 that connect under the pipe range of record can calculate a value respectively.
With certain R22 system is example,
Weighted average can calculate a=0.0532 ℃/m.
System like this; Known evaporator bulb detects 1=7.62 ℃ of evaporator evaporation temperature T; The off-premises station pressure sensor detects corresponding saturation temperature T2=4.33 ℃ of pressure of inspiration(Pi), then tube connector equivalent length between the indoor and outdoor unit=(7.62-4.33)/0.0532=62m.
After drawing the equivalent length of off-premises station, again according to the modification method of corresponding equivalent length, the ability output of suitable increase off-premises station changes the aperture of restricting element, and the ability output of indoor set is increased.
Can find out that through above description the present invention can judge the loss that tube connector caused of indoor and outdoor machine accurately, and feed back to revising of off-premises station, the operational factor and the flow-control of off-premises station are revised, the ability of losing is compensated.Be directed against the tube connector of different length like this and export needed ability, make things convenient for practical application.Further; The present invention can also be when judging the loss of tube connector; Except tube connector length is judged, except friction loss, also exist under the situation of local resistance loss owing to effect length in actual engineering; Also can calculate corresponding equivalent length with technical scheme of the present invention; Be converted into equivalent length correction to loss, so, just can give play to effect of the present invention on actual engineering as long as no matter air-conditioner is how to use correct installation method and refrigerant super-addition amount.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the determination methods of indoor and outdoor machine tube connector length in the air-conditioning system is characterized in that, comprising:
Detect the evaporator temperature;
Detect the corresponding saturation temperature of compressor inlet pressure; And
Temperature gap according to the corresponding saturation temperature of said evaporator temperature and said compressor inlet pressure is judged indoor and outdoor machine tube connector length in the said air-conditioning system; Wherein, in said air-conditioning system, prestore the corresponding relation of said temperature gap and said indoor and outdoor machine tube connector length.
2. the determination methods of indoor and outdoor machine tube connector length is characterized in that in the air-conditioning system according to claim 1, detects the corresponding saturation temperature of compressor inlet pressure and comprises:
Detect the inlet pressure value of compressor; And
Obtain the corresponding saturation temperature of inlet pressure value of said compressor.
3. the determination methods of indoor and outdoor machine tube connector length is characterized in that in the air-conditioning system according to claim 1, and said temperature gap with the corresponding relation of said indoor and outdoor machine tube connector length is: unit length connects the corresponding temperature difference of pipe range.
4. the determination methods of indoor and outdoor machine tube connector length in the air-conditioning system according to claim 3; It is characterized in that; Judging according to the temperature gap of the corresponding saturation temperature of said evaporator temperature and said compressor inlet pressure in the said air-conditioning system before the indoor and outdoor machine tube connector length; Also comprise: obtain unit length and connect the corresponding temperature difference of pipe range, obtain the corresponding temperature difference of unit length connection pipe range and comprise:
Detect evaporator temperature and the corresponding saturation temperature of compressor inlet pressure in the known air-conditioning system, wherein,
Indoor and outdoor machine tube connector length in the said known air-conditioning system is known; And
Obtain the temperature difference that said unit length is connected the pipe range correspondence according to a plurality of indoor and outdoor machine tube connector length in the said known air-conditioning system and a plurality of evaporator temperature in the said known air-conditioning system with the corresponding saturation temperature of compressor inlet pressure;
Each unit length in the said known air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain the corresponding temperature difference of unit length connection pipe range in the said known air-conditioning system.
5. the determination methods of indoor and outdoor machine tube connector length in the air-conditioning system according to claim 4; It is characterized in that; Said known air-conditioning system is a plurality of, and the tube connector length in these a plurality of air-conditioning systems is different, obtains the corresponding temperature difference of unit length connection pipe range and comprises:
Obtain the corresponding temperature difference of unit length connection pipe range in each known air-conditioning system respectively; And
Unit length in each known air-conditioning system is connected the corresponding temperature difference of pipe range carry out weighted average, obtain said unit length and connect the corresponding temperature difference of pipe range.
6. the determination methods of indoor and outdoor machine tube connector length in the air-conditioning system according to claim 1; It is characterized in that; Also comprise after the indoor and outdoor machine tube connector length judging according to the temperature gap of the corresponding saturation temperature of said evaporator temperature and said compressor inlet pressure in the said air-conditioning system:
According to said indoor and outdoor machine tube connector length the operational factor and the flow-control of off-premises station are revised.
7. an air-conditioning system is characterized in that, comprising:
Evaporimeter;
Temperature sensor is arranged at the import department of said evaporimeter, is used to detect the evaporator temperature;
Compressor;
Pressure sensor is arranged at the porch of said compressor, is used to detect the pressure at place, suction port of compressor; And
Controller; Be used to detect the corresponding saturation temperature of said pressure; And judge indoor and outdoor machine tube connector length in the said air-conditioning system according to the temperature gap of the corresponding saturation temperature of said evaporator temperature and said compressor inlet pressure; Wherein, in said air-conditioning system, prestore the corresponding relation of said temperature gap and said indoor and outdoor machine tube connector length.
8. air-conditioning system according to claim 7 is characterized in that, said controller also is used for according to said indoor and outdoor machine tube connector length the operational factor and the flow-control of off-premises station being revised.
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| CN201010569424.1A CN102486333B (en) | 2010-12-01 | 2010-12-01 | Air-conditioning system and method for judging length of connecting pipe of indoor unit and outdoor unit |
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| CN201010569424.1A CN102486333B (en) | 2010-12-01 | 2010-12-01 | Air-conditioning system and method for judging length of connecting pipe of indoor unit and outdoor unit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104748287A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Selection software construction and pipe length calculation method and system and central air conditioner |
| CN105299827A (en) * | 2015-10-10 | 2016-02-03 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN105423978A (en) * | 2015-11-23 | 2016-03-23 | 珠海格力电器股份有限公司 | Detection method, apparatus and system for engineering piping length of multi-split system |
| CN107514767A (en) * | 2017-08-31 | 2017-12-26 | 四川长虹电器股份有限公司 | A kind of apparatus and method for improving refrigeration system efficiency |
| CN107576114A (en) * | 2017-09-27 | 2018-01-12 | 四川长虹电器股份有限公司 | A kind of system and method for being used to obtain multiple on-line system main pipe rail length |
| CN107830665A (en) * | 2017-09-28 | 2018-03-23 | 四川长虹电器股份有限公司 | A kind of device and method for improving air-conditioning heating refrigeration |
| CN111397168A (en) * | 2020-03-24 | 2020-07-10 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system, control equipment, medium and air conditioning system |
| CN111678239A (en) * | 2020-05-20 | 2020-09-18 | 浙江中广电器股份有限公司 | Quantitative method for additional refrigerant, processor and air conditioner |
| CN112032921A (en) * | 2020-08-06 | 2020-12-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN112984707A (en) * | 2021-03-29 | 2021-06-18 | 宁波奥克斯电气股份有限公司 | Refrigeration control method of multi-connected indoor unit air conditioner, air conditioner and application |
| CN113324287A (en) * | 2021-05-21 | 2021-08-31 | 广东美的暖通设备有限公司 | Method and device for identifying lengths of connecting pipes of indoor unit and outdoor unit and air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104748287A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Selection software construction and pipe length calculation method and system and central air conditioner |
| CN105299827B (en) * | 2015-10-10 | 2018-11-02 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
| CN105299827A (en) * | 2015-10-10 | 2016-02-03 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN105423978A (en) * | 2015-11-23 | 2016-03-23 | 珠海格力电器股份有限公司 | Detection method, apparatus and system for engineering piping length of multi-split system |
| CN105423978B (en) * | 2015-11-23 | 2018-12-07 | 珠海格力电器股份有限公司 | Detection method, the device and system of the engineering piping length of multi-line system |
| CN107514767A (en) * | 2017-08-31 | 2017-12-26 | 四川长虹电器股份有限公司 | A kind of apparatus and method for improving refrigeration system efficiency |
| CN107576114B (en) * | 2017-09-27 | 2020-01-31 | 四川长虹电器股份有限公司 | system and method for acquiring total pipeline length of multi-split system |
| CN107576114A (en) * | 2017-09-27 | 2018-01-12 | 四川长虹电器股份有限公司 | A kind of system and method for being used to obtain multiple on-line system main pipe rail length |
| CN107830665A (en) * | 2017-09-28 | 2018-03-23 | 四川长虹电器股份有限公司 | A kind of device and method for improving air-conditioning heating refrigeration |
| CN111397168A (en) * | 2020-03-24 | 2020-07-10 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system, control equipment, medium and air conditioning system |
| CN111397168B (en) * | 2020-03-24 | 2021-12-24 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system, control equipment, medium and air conditioning system |
| CN111678239A (en) * | 2020-05-20 | 2020-09-18 | 浙江中广电器股份有限公司 | Quantitative method for additional refrigerant, processor and air conditioner |
| CN111678239B (en) * | 2020-05-20 | 2022-04-19 | 浙江中广电器集团股份有限公司 | Quantitative method for additional refrigerant, processor and air conditioner |
| CN112032921A (en) * | 2020-08-06 | 2020-12-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN112032921B (en) * | 2020-08-06 | 2022-01-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN112984707A (en) * | 2021-03-29 | 2021-06-18 | 宁波奥克斯电气股份有限公司 | Refrigeration control method of multi-connected indoor unit air conditioner, air conditioner and application |
| CN113324287A (en) * | 2021-05-21 | 2021-08-31 | 广东美的暖通设备有限公司 | Method and device for identifying lengths of connecting pipes of indoor unit and outdoor unit and air conditioning system |
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