CN1414324A - Twin compressor room air conditioner and its control method - Google Patents
Twin compressor room air conditioner and its control method Download PDFInfo
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- CN1414324A CN1414324A CN02134979A CN02134979A CN1414324A CN 1414324 A CN1414324 A CN 1414324A CN 02134979 A CN02134979 A CN 02134979A CN 02134979 A CN02134979 A CN 02134979A CN 1414324 A CN1414324 A CN 1414324A
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Abstract
The present invention relates to a double compressor system room air conditioner and its control method, it contains first and second two compressors parallely connected in a refrigerating circulating loop which includes oil separator, outdoor heat exchanger, controllable throttle unit, outdoor heat exchanger and gas-liquid separator, the first and second compressors use the same indoor heat exchanger and outdoor heat excahnger; the return air port of first and second compressors are communicated and between them is installed with a one-way valve, and is connected with the outlet of gas liquid separator. The said system possesses the advantages of saving energy, raising energy efficiency ratio, etc.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to a kind of double compressor system room air conditioner and control method thereof.
Background technology
The tradition room air conditioner generally adopts the single compressor refrigeration system, and there are many deficiencies in this system, and for example, the long-time running meeting of unit causes the mechanical fatigue of compressor, thereby shortens the service life of compressor; Single constant speed compressor system can not make according to the variation of using room load and rationally regulating accordingly, though and single frequency-changeable compressor system can regulate according to the variation of using room load, in adjustment process, can bring the phenomenon of electromagnetic interference.
China's utility model patent 94242375.5 discloses a kind of " compressor in air conditioner refrigerating plant in parallel ", the compressor that between outdoor heat exchanger (condenser) and indoor heat exchanger (evaporimeter), has been communicated with the parallel connection more than two by air inlet pipe, blast pipe, and the compressor air-discharging end beyond first is equipped with check-valves, therefore, can start by echelon, the peak value of the surge current when avoiding starting superposes, and can realize the purpose of change work compression board number.China's utility model patent 98228811.5 discloses a kind of " the pressure release starting drive of refrigeration system compressor ", a check valve is connected between the higher-pressure region of the exhaust outlet of compressor and refrigeration system, and a magnetic valve is connected the two ends of this compressor, thereby the pressure release that has solved the multi-compressor system starts problem.China's utility model patent 00240625 discloses a kind of " double-compressor oil level balancer ", realizes the oil level equilibrium of double-compressor by cross-coupled pipe arrangement.Japanese kokai publication hei 11-94375 discloses a kind of air-conditioner, adopts two compressors, is provided with oil balance tube between two compressors, needs custom-designed compressor, complex structure, manufacturing cost height.Above-mentioned prior art and fails to propose simple and effective control method under the double-compressor working environment.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of double compressor system room air conditioner and control method thereof are provided, can use common compressor, oil return problem when combination controlling method can effectively solve unit work and smooth the startup and switching problem, and can realize that double-compressor is used alternatingly by temperature detection and control, effectively reduce the compressor long-time continuous and use caused mechanical fatigue, improve complete machine service life by reaching the service life that prolongs compressor; Can determine the platform number that compressor is opened in the double-compressor use according to the variation of room load, make ability output that certain self-regulation be arranged, avoid waste, improve the service efficiency of the energy.
Technical problem of the present invention is to solve by following technical scheme: construct a kind of twin compressor room air conditioner, be connected in the refrigeration cycle that comprises oil eliminator, outdoor heat exchanger, throttling unit, indoor heat exchanger and vapour liquid separator by first, second two compressor parallels, it is characterized in that, the described throttling unit that is located at described outdoor heat exchanger outlet is regulatable throttling unit, and described second exhaust outlet of compressor, described first exhaust outlet of compressor are connected to the first and second decompression starting magnetic valves respectively and are connected on the vapour liquid separator; Described first compressor, described second exhaust outlet of compressor also are connected to oil eliminator by first, second check valve respectively, and described oil eliminator also is connected with described gas-liquid separator by decompression member; The return-air mouth of described first compressor is communicated with the return-air mouth of described second compressor, and the 3rd check valve is housed therebetween, and is connected with the outlet of described vapour liquid separator.
In above-mentioned twin compressor room air conditioner, be connected with four-way change-over valve between the oil eliminator of described kind of refrigeration cycle path, described indoor heat exchanger and the described outdoor heat exchanger.
In above-mentioned twin compressor room air conditioner, described adjustable throttling unit comprises the capillary that two-way or multi-channel parallel connect, and wherein the capillary branch road at least one road is serially connected with throttling control magnetic valve.
In above-mentioned twin compressor room air conditioner, described adjustable throttling unit comprises electromagnetic throttle valve.
In above-mentioned twin compressor room air conditioner, described indoor heat exchanger is arranged in the indoor machine of air-conditioner, the described indoor heat exchanger that places off-premises station is the concentrated integral body that an inlet and an outlet are arranged, and to place the described outdoor heat exchanger of off-premises station be the concentrated integral body that an inlet and an outlet are arranged.
In above-mentioned twin compressor room air conditioner, described decompression member is a capillary.
In above-mentioned twin compressor room air conditioner, described decompression member is a pressure-reducing valve.
In above-mentioned twin compressor room air conditioner, comprise that also the 4th check valve is connected between described gas-liquid separator outlet and the compressor return air mouth.
Air-conditioner control method of the present invention may further comprise the steps:
When the user starts shooting, at first bring into operation by the compressor of default host;
When timer reaches T1, do with next step operation of decision that judges: if the temperature difference greater than preset value a, starts from compressor; If the temperature difference is less than preset value b, the compressor of default host is out of service;
If timer reaches T2, do with next step operation of decision that judges: as main compressor, from compressor all in work, then timer zero clearing; If have only main compressor operation, then from compressor start, double-compressor moves jointly and running timer reaches T3, recovers unit operation again and with the timer zero clearing;
, then carry out main frame-slave and switch more than or equal to T4 as the main frame compressor operating time;
, then carry out main frame-slave and switch more than or equal to preset value N as main frame startup-shutdown number of times.
Implement twin compressor room air conditioner provided by the invention and control method thereof, compared with the prior art, not only can improve the efficiency in season greatly than single compressor system, energy savings, reduce manufacturing cost, satisfy user's needs, comparable single high-power compressor, and can reduce manufacturing cost greatly, reduced user's use cost.
Description of drawings
Fig. 1 is the system schematic of twin compressor room air conditioner embodiment of the present invention;
Fig. 2 is the system schematic of another embodiment of twin compressor room air conditioner of the present invention;
Fig. 3 illustrates the control flow chart of an embodiment of invention control method.
The specific embodiment
As shown in Figure 1, the present invention includes a kind of refrigeration cycle path of forming by compressor 1,2, oil eliminator 4, cross valve 5, outdoor heat exchanger 6, restricting element 7,8, indoor heat exchanger 10 and vapour liquid separator 11.Compressor 1 and compressor 2 are in parallel mutually.On blast pipe 16,21, be provided with bypass line 20,23 and the check valve 3,15 that has bypass solenoid valve 13 and 14 respectively successively near compressor 1 and 2 exhaust ports.Above-mentioned blast pipe 16,21 is connecing check valve 3,15 backs one-tenth in parallel exhaust main 18, connects the inlet of oil eliminator 4.The above-mentioned bypass solenoid valve 13 that has links to each other with vapour liquid separator 11 inlets respectively with 14 bypass line 20,23.Between above-mentioned oil eliminator 4 and vapour liquid separator 11, connect with decompression member 24.Refrigeration or the restricting element 7 and 8 that heats usefulness are connected in parallel on mutually between outdoor heat exchanger 6 and the indoor heat exchanger 10, wherein, restricting element 7 corresponding compressors 1, restricting element 8 corresponding compressors 2, and behind restricting element 8, also be provided with magnetic valve 9.Herein, decompression member 24 can be capillary or pressure-reducing valve etc.
In the embodiment shown in Fig. 2, saved check valve 25, other are identical with embodiment 1.
Air-conditioner of the present invention is performed such control and sets, when the user started shooting, compressor 1 at first brought into operation, when compressor 1 runs to T1 during the time, system carries out intelligent decision according to the parameter of unit setting itself and the parameter of customer requirements again, and whether decision compressor 2 needs operation.If compressor 2 needs to start, then connect magnetic valve 13 energisings of compressor 2 exhaust outlets, when the time of opening arrived T2, compressor 2 started.Before compressor 2 operations, magnetic valve 9 energisings make restricting element 7 and 8 play throttling action to system jointly.When 13 conduction times of magnetic valve, accumulative total was for T3, these magnetic valve 13 outages were closed.Above-mentioned magnetic valve 13 reduce compressor 2 suction and discharge pressure differentials as the time spent, make the compressor 2 can clean boot operation under the smaller situation of suction and discharge pressure differential.If variation or the user because of environment temperature in running of system changes setup parameter, need do adjusting to the fan-out capability of system, then compressor 2 is out of service.Out of service or be in non-operating state when compressor 2, then magnetic valve 9 outages are closed, and have only 1 pair of system of restricting element to play throttling action always.
Double compressor system regulation compressor 1 of the present invention is the main compressor of long-time running.When the on-off frequency of a compressor 1 reaches N time, then switch with another compressor 2, be about to compressor 2 and switch to main compressor, main compressor 1 originally then is identified as from compressor.Or when compressor 1 (being main compressor) when continuous operating time reaches T4, compressor 1,2 switches.
Double compressor system of the present invention freezes and adopted the design philosophy of double-compressor oil balance at the oil return design aspect, and is poor to prevent that bigger oil level from appearring in double-compressor.Connect oil eliminator 4 after the blast pipe parallel connection of double- compressor 1,2, after the effect of oil eliminator 4, nearly 85% lubricating oil is got back to vapour liquid separator 11 through decompression member 24, and takes back compressor by cold-producing medium.When compressor 1 operation, check valve 12 (25) can prevent that lubricating oil from flowing to compressor 1 (2) from compressor 2 (1).When compressor 1,2 moved simultaneously, lubricating oil can enter respectively compressor 1 and 2 from muffler 22,17. Check valve 12 and 25 effect are the one-way flow that guarantees lubricating oil, promptly when compressor operating switches, prevent that lubricating oil from flowing to another compressor from a compressor.In concrete enforcement, can all adopt by two check valves, also can only adopt check valve 12 or 25 on a compressor therein.
Fig. 3 is an embodiment flow chart of the inventive method, as shown in Figure 3, frame 301 request starts are after the start, at the compressor operating of frame 302 startup default hosts, judge respectively in frame 303,304 and 305 whether the main frame continuous operating time reaches T1, T2 and T5.
Greater than T1, whether judge the temperature difference greater than a running time as in frame 303, judging,, start another compressor operation at frame 307 as greater than a at frame 306.If the temperature difference is smaller or equal to a, the slave compressor then is set in frame 308 to quit work, further in frame 309, whether judge the temperature difference less than b, if the temperature difference is not less than b, return frame 303, if the temperature difference less than b, then is provided with main compressor and quits work in frame 310, when in frame 311, judging the temperature difference more than or equal to b, then return frame 302, allow main compressor move again.
As in frame 304, judging running time greater than T2, then in frame 312, judge whether two-shipper in operation, as master and slave compressor in operation, then in frame 313 with timing T zero clearing; As not being in the duplex running state, after then in frame 314, making the two-shipper startup and running to T3, in frame 315, recovering unit operation and forward frame to the timer zero clearing.
Main frame running time, then in frame 316, carry out main frame and switch as in frame 305, judging, as judging that in frame 305 main frame running time is less than T4 more than or equal to T4; then judge that at frame 317 main frame startup-shutdown number of times is more than or equal to N; as judge establishment, then carry out main frame and switch, otherwise return at frame 316.
In the foregoing description, temperature difference a is by the decision of two-shipper start-up temperature, and b is by the decision of unit shutoff temperature, a＞b usually; T1 is the minimum stream time of main frame; T2 is the longest unit working time; T3 is that the farm labourer of two-shipper does the time, and T4 is the longest stream time of main frame.
Utilize control method of the present invention, can control, system is realized the two-stage adjusting the combination that the double-compressor in the room air conditioner 1,2 is implemented to optimize.When compressor 1 operation, system's 50% operation, when compressor 1,2 moves simultaneously, system's 100% operation.Because compressor 2 can be made adjusting according to the refrigerating capacity of reality, double compressor system is compared with single compressor system, just has energy-conservation, as to improve seasonal energy efficiency ratio (seer), increase room comfortableness advantage.Because the present invention is arranged on the indoor heat exchanger of an integral body in the indoor machine of air-conditioner, and compressor, outdoor heat exchanger are to place off-premises station, and as a whole respectively, therefore, being different from has one of two or more indoor heat exchangers to drag multisystem.
Claims (10)
1, a kind of twin compressor room air conditioner, be connected in parallel in the refrigeration cycle that comprises oil eliminator (4), outdoor heat exchanger (6), throttling unit, indoor heat exchanger (10) and vapour liquid separator (11) by first, second two compressors (1,2), it is characterized in that, the described throttling unit that is located at described outdoor heat exchanger (6) outlet is regulatable throttling unit, and described second compressor (2) exhaust outlet, described first compressor (1) exhaust outlet are connected to the first and second decompression starting magnetic valves (13,14) respectively and connect on the vapour liquid separator (11); Described first compressor (1), described second compressor (2) exhaust outlet also are connected to described oil eliminator (4) by first, second check valve (15,3) respectively, and described oil eliminator (4) also is connected with described gas-liquid separator (11) by decompression member (24); The return-air mouth of described first compressor (1) is communicated with the return-air mouth of described second compressor (2), and the 3rd check valve (12) is housed therebetween, and is connected with the outlet of described vapour liquid separator (11).
2, according to the described twin compressor room air conditioner of claim 1, it is characterized in that, be connected with four-way change-over valve (5) between the oil eliminator of described kind of refrigeration cycle path (4), described indoor heat exchanger (10) and the described outdoor heat exchanger (6).
According to the described twin compressor room air conditioner of claim 1, it is characterized in that 3, described adjustable throttling unit comprises the capillary (7) that two-way or multi-channel parallel connect, wherein the capillary branch road (8) at least one road is serially connected with throttling control magnetic valve (9).
According to the described twin compressor room air conditioner of claim 1, it is characterized in that 4, described adjustable throttling unit comprises electromagnetic throttle valve.
According to the described twin compressor room air conditioner of claim 1, it is characterized in that 5, described decompression member (24) is a capillary.
According to the described twin compressor room air conditioner of claim 1, it is characterized in that 6, described decompression member (24) is a pressure-reducing valve.
According to any one described twin compressor room air conditioner of claim 1-6, it is characterized in that 7, described indoor heat exchanger is the concentrated integral body that (10) have an entrance and exit, places indoor machine of air-conditioner.
According to any one described twin compressor room air conditioner of claim 1-6, it is characterized in that 8, described outdoor heat exchanger (6) is the concentrated integral body that an entrance and exit is arranged, and places off-premises station.
9, according to any one described twin compressor room air conditioner of claim 1-6, it is characterized in that, comprise that also the 4th check valve (25) is connected between described gas-liquid separator (11) outlet and the compressor return air mouth.
10, a kind of control method of twin compressor room air conditioner according to claim 1 is characterized in that, may further comprise the steps:
(1) when the user starts shooting, at first brings into operation by the compressor of default host;
(2) reach T1 when timer, do with next step operation of decision that judges:, start from compressor if (2A) temperature difference is greater than preset value a; If (2B) temperature difference is smaller or equal to preset value b, the compressor of default host is out of service;
(3), do with next step operation of decision that judges if timer reaches T2: 3A) as main compressor, from compressor all in work, then timer zero clearing; If 3B) have only main compressor operation, then from compressor start, double-compressor moves jointly and running timer reaches T3, recovers unit operation again and with the timer zero clearing;
(4) as the main frame compressor operating time more than or equal to T4, then carry out main frame-slave and switch;
(5) as main frame startup-shutdown number of times more than or equal to preset value N, then carry out main frame-slave and switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021349797A CN1250925C (en) | 2002-10-16 | 2002-10-16 | Twin compressor room air conditioner and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021349797A CN1250925C (en) | 2002-10-16 | 2002-10-16 | Twin compressor room air conditioner and its control method |
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| CN1414324A true CN1414324A (en) | 2003-04-30 |
| CN1250925C CN1250925C (en) | 2006-04-12 |
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| CNB021349797A Expired - Fee Related CN1250925C (en) | 2002-10-16 | 2002-10-16 | Twin compressor room air conditioner and its control method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100360877C (en) * | 2005-01-11 | 2008-01-09 | 三星电子株式会社 | Air conditioner |
| CN100523668C (en) * | 2003-11-04 | 2009-08-05 | Lg电子株式会社 | Method for controlling air conditioner having multi-compressor |
| CN1690602B (en) * | 2004-04-28 | 2010-05-05 | 乐金电子(天津)电器有限公司 | Oil supply arrangement for air conditioner compressor |
| CN101749890A (en) * | 2008-12-11 | 2010-06-23 | 株式会社富士通将军股份有限公司 | Refrigeration apparatus and method for controlling the same |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN102914028A (en) * | 2012-10-19 | 2013-02-06 | 广东美的制冷设备有限公司 | Energy saving control method and system as well as air conditioner |
| CN103196209A (en) * | 2013-04-23 | 2013-07-10 | 广东志高空调有限公司 | Automatic air-conditioner switching method and automatic air-conditioner switching device |
| CN103206757A (en) * | 2013-04-09 | 2013-07-17 | 林开生 | Double-circulation constant temperature-humidity air-conditioner and control device thereof |
| CN105042918A (en) * | 2015-06-02 | 2015-11-11 | 西克制冷（无锡）有限公司 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
| CN105222383A (en) * | 2015-10-09 | 2016-01-06 | 珠海格力电器股份有限公司 | Heat pump system and control method for heat pump system |
| CN105593610A (en) * | 2013-09-30 | 2016-05-18 | 三菱重工业株式会社 | Heat pump system, and heat pump water heater |
| CN105841386A (en) * | 2016-05-16 | 2016-08-10 | 广东芬尼克兹节能设备有限公司 | Energy-efficient parallel system |
| CN106940103A (en) * | 2017-03-14 | 2017-07-11 | 广东志高暖通设备股份有限公司 | A kind of parallel compressor system and refrigeration plant |
| CN108224839A (en) * | 2017-12-29 | 2018-06-29 | Tcl空调器(中山)有限公司 | A kind of multi-online air-conditioning system and its control method |
| CN108302739A (en) * | 2018-01-16 | 2018-07-20 | 武汉百世节能环保有限公司 | A kind of humidity control system and temperature control method |
| CN110118422A (en) * | 2018-02-07 | 2019-08-13 | 台达电子工业股份有限公司 | Cold air conditioning system and its operating method |
| CN113551302A (en) * | 2021-08-04 | 2021-10-26 | 珠海格力电器股份有限公司 | Multi-compressor refrigeration system and air conditioner |
| CN114484716A (en) * | 2022-01-11 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioner, control method and device thereof and computer readable storage medium |
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2002
- 2002-10-16 CN CNB021349797A patent/CN1250925C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100523668C (en) * | 2003-11-04 | 2009-08-05 | Lg电子株式会社 | Method for controlling air conditioner having multi-compressor |
| CN1690602B (en) * | 2004-04-28 | 2010-05-05 | 乐金电子(天津)电器有限公司 | Oil supply arrangement for air conditioner compressor |
| CN100360877C (en) * | 2005-01-11 | 2008-01-09 | 三星电子株式会社 | Air conditioner |
| CN101749890A (en) * | 2008-12-11 | 2010-06-23 | 株式会社富士通将军股份有限公司 | Refrigeration apparatus and method for controlling the same |
| CN101749890B (en) * | 2008-12-11 | 2014-02-26 | 株式会社富士通将军股份有限公司 | Refrigeration apparatus and method for controlling the same |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN102914028A (en) * | 2012-10-19 | 2013-02-06 | 广东美的制冷设备有限公司 | Energy saving control method and system as well as air conditioner |
| CN102914028B (en) * | 2012-10-19 | 2015-12-16 | 广东美的制冷设备有限公司 | Energy-saving control method, system and air-conditioner |
| CN103206757A (en) * | 2013-04-09 | 2013-07-17 | 林开生 | Double-circulation constant temperature-humidity air-conditioner and control device thereof |
| CN103196209A (en) * | 2013-04-23 | 2013-07-10 | 广东志高空调有限公司 | Automatic air-conditioner switching method and automatic air-conditioner switching device |
| CN103196209B (en) * | 2013-04-23 | 2016-06-08 | 广东志高空调有限公司 | A kind of air-conditioning automatic switching method and device |
| CN105593610A (en) * | 2013-09-30 | 2016-05-18 | 三菱重工业株式会社 | Heat pump system, and heat pump water heater |
| CN105593610B (en) * | 2013-09-30 | 2017-09-08 | 三菱重工业株式会社 | Heat pump and heat-pump-type hot-warer supplying machine |
| CN105042918A (en) * | 2015-06-02 | 2015-11-11 | 西克制冷（无锡）有限公司 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
| CN105222383A (en) * | 2015-10-09 | 2016-01-06 | 珠海格力电器股份有限公司 | Heat pump system and control method for heat pump system |
| CN105222383B (en) * | 2015-10-09 | 2018-02-02 | 珠海格力电器股份有限公司 | Heat pump system and control method for heat pump system |
| CN105841386A (en) * | 2016-05-16 | 2016-08-10 | 广东芬尼克兹节能设备有限公司 | Energy-efficient parallel system |
| CN106940103A (en) * | 2017-03-14 | 2017-07-11 | 广东志高暖通设备股份有限公司 | A kind of parallel compressor system and refrigeration plant |
| CN108224839A (en) * | 2017-12-29 | 2018-06-29 | Tcl空调器(中山)有限公司 | A kind of multi-online air-conditioning system and its control method |
| CN108302739A (en) * | 2018-01-16 | 2018-07-20 | 武汉百世节能环保有限公司 | A kind of humidity control system and temperature control method |
| CN108302739B (en) * | 2018-01-16 | 2020-05-19 | 武汉百世节能环保有限公司 | Temperature adjusting system and temperature adjusting method |
| CN110118422A (en) * | 2018-02-07 | 2019-08-13 | 台达电子工业股份有限公司 | Cold air conditioning system and its operating method |
| CN110118422B (en) * | 2018-02-07 | 2021-07-13 | 台达电子工业股份有限公司 | Air conditioning system and operation method thereof |
| US11175059B2 (en) | 2018-02-07 | 2021-11-16 | Delta Electronics, Inc. | Air conditioning system and method of operating the same |
| CN113551302A (en) * | 2021-08-04 | 2021-10-26 | 珠海格力电器股份有限公司 | Multi-compressor refrigeration system and air conditioner |
| CN114484716A (en) * | 2022-01-11 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioner, control method and device thereof and computer readable storage medium |
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| CN1250925C (en) | 2006-04-12 |
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