CN105588286A - Control method and device of multi-split air conditioner - Google Patents
Control method and device of multi-split air conditioner Download PDFInfo
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- CN105588286A CN105588286A CN201610088058.5A CN201610088058A CN105588286A CN 105588286 A CN105588286 A CN 105588286A CN 201610088058 A CN201610088058 A CN 201610088058A CN 105588286 A CN105588286 A CN 105588286A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003507 refrigerant Substances 0.000 description 26
- 230000004087 circulation Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000002826 coolant Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009885 systemic effect Effects 0.000 description 2
- 241000949477 Toona ciliata Species 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a control method and device of a multi-split air conditioner. The control method comprises the following steps: detecting the exhaust temperature of the compressor of the multi-split air conditioner under the condition that the ratio of the first number of the first internal machines in the starting state to the total number of the internal machines of the multi-split air conditioner is smaller than a preset ratio; judging whether the exhaust temperature is greater than a first preset temperature or not; and if the exhaust temperature is higher than the first preset temperature, starting a second indoor unit in a shutdown state, wherein the indoor units of the multi-split air conditioner comprise a first indoor unit and a second indoor unit. The invention solves the technical problem that the exhaust temperature of the existing multi-split air conditioner cannot be effectively reduced.
Description
Technical field
The present invention relates to air-conditioning control field, in particular to a kind of control method and device of multi-connected machine.
Background technology
When existing multi-gang air-conditioner refrigeration, when in the situation that environment temperature is higher and connection pipe for internal-external unit is grown, generalTo reduce system pressure, reduce compressor exhaust temperature by reducing compressor frequency and increasing electronic expansion valve opening,To ensure air-conditioning reliability service. Adopt this control method, delivery temperature is still higher, particularly only drives an interior machineTime, because systemic circulation refrigerant is few and connect pipe range, the refrigerant after evaporimeter heat exchange continues heat absorption in tube connector,Thereby make refrigerant overheated, cause excessive discharge temperature. In addition, general multi-connected machine is all furnished with oil eliminator, and this oil separatesDevice is separated the compressor lubricant oil of discharging from exhaust outlet of compressor, directly draws back compressor suction end (or gas-liquidSeparator), the oil of high temperature mixes with refrigerant, further refrigerant temperature is improved, and also can make refrigerant overheated, causes exhaustExcess Temperature, is unfavorable for extending the compressor life-span.
Multi-connected machine, under refrigeration mode, because environment temperature is high, and connects pipe range, singly opens or use interior machine negligible amountsTime, system refrigerant circulation is few, easily produces overheated refrigerant, makes the phenomenon of compressor air suction, excessive discharge temperature,This overheated refrigerant further mixes with the press oil of high temperature again, easily occurs exhaust protection shutdown, reduces reliableProperty, cause that client is discontented, even control (as the frequency reducing of exhaust limit, target exhaust control electric expansion valve etc.) by other,Minimum operation of press frequency, interior machine restricting element electric expansion valve step number has reached maximum, due to all unfavorableThe stack of factor, still there will be excessive discharge temperature phenomenon.
Cannot effectively reduce the problem of delivery temperature for above-mentioned existing multi-gang air-conditioner, not yet propose effectively at presentSolution.
Summary of the invention
The embodiment of the present invention provides a kind of control method and device of multi-connected machine, at least to solve existing multi-connected machine skyTune cannot effectively reduce the technical problem of delivery temperature.
According to the embodiment of the present invention aspect, a kind of control method of multi-connected machine is provided, this control method comprises:Be less than the feelings of default ratio at the ratio of the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machineUnder condition, detect the delivery temperature of the compressor of described multi-connected machine; Judge whether described delivery temperature is greater than the first default temperatureDegree; If described delivery temperature is greater than described the first preset temperature, open the second interior machine in stopped status, wherein,The interior machine of described multi-connected machine comprises described the first interior machine and described the second interior machine.
Further, open and comprise in the second interior machine of stopped status: be true based on the first quantity and described interior machine total amountSurely wait to open the second quantity of interior machine; Opening quantity is the electric expansion valve to the first of the second interior machine of described the second quantityAperture.
Further, determine and wait that second quantity of opening interior machine comprises based on the first quantity and described interior machine total amount: calculateThe difference of described interior machine total amount and described the first quantity, obtains in described multi-connected machine the 3rd quantity N of machine in shutting down; SentenceWhether disconnected described interior machine total amount is greater than predetermined number; If described interior machine total amount is not more than described predetermined number, described in inciting somebody to actionThe 3rd quantity is as described the second quantity; If described interior machine total amount is greater than described predetermined number, true in the following mannerFixed described the second quantity M, wherein, M=x*N, wherein, M and N are natural number, x is greater than 0 and be less than 1Real number.
Further, after unlatching quantity is electric expansion valve to the first aperture of the second interior machine of described the second quantity,Described control method also comprises: when the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature,Close the electric expansion valve of described the second interior machine, wherein, described the first preset temperature is higher than described the second preset temperature.
Further, after unlatching quantity is electric expansion valve to the first aperture of the second interior machine of described the second quantity,Described control method also comprises: when the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature,The electric expansion valve of described the second interior machine is adjusted to the second aperture, and wherein, described the first preset temperature is higher than describedTwo preset temperatures, described the second aperture is less than described the first aperture.
According to the embodiment of the present invention on the other hand, also provide a kind of control device of multi-connected machine, this control device bagDraw together: detecting unit, for the ratio of the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machineValue is less than in the situation of default ratio, detects the delivery temperature of the compressor of described multi-connected machine; Judging unit, for sentencingWhether disconnected described delivery temperature is greater than the first preset temperature; Open unit, if be greater than described for described delivery temperatureOne preset temperature, opens the second interior machine in stopped status, and wherein, the interior machine of described multi-connected machine comprises describedOne interior machine and described the second interior machine.
Further, described unlatching unit comprises: determination module, and for true based on the first quantity and described interior machine total amountSurely wait to open the second quantity of interior machine; Opening module, for opening the electricity that quantity is the second interior machine of described the second quantitySub-expansion valve to the first aperture.
Further, described determination module comprises: computing module, and for calculating described interior machine total amount and described the first numberThe difference of amount, obtains in described multi-connected machine the 3rd quantity N of machine in shutting down; Judge module, for judging described interior machineWhether total amount is greater than predetermined number; The first processing module, if be not more than described predetermined number for described interior machine total amount,Using described the 3rd quantity as described the second quantity; The second processing module, if described in being greater than for described interior machine total amountPredetermined number, determines described the second quantity M in the following manner, wherein, M=x*N, wherein, M and N areNatural number, x is greater than 0 and be less than 1 real number.
Further, described control device also comprises: closing module, and for being described the second quantity opening quantityAfter electric expansion valve to the first aperture of the second interior machine, when detecting that the delivery temperature of compressor of described multi-connected machine is lowIn the time of the second preset temperature, close the electric expansion valve of described the second interior machine, wherein, described the first preset temperature higher thanDescribed the second preset temperature.
Further, described control device also comprises: adjusting module, and for being described the second quantity opening quantityAfter electric expansion valve to the first aperture of the second interior machine, when detecting that the delivery temperature of compressor of described multi-connected machine is lowIn the time of the second preset temperature, the electric expansion valve of described the second interior machine is adjusted to the second aperture, wherein, described firstPreset temperature is higher than described the second preset temperature, and described the second aperture is less than described the first aperture.
In embodiments of the present invention, adopt at the first quantity of the first interior machine in open state and the interior machine of multi-connected machineThe ratio of total amount is less than in the situation of default ratio, detects the delivery temperature of the compressor of described multi-connected machine; Described in judgementWhether delivery temperature is greater than the first preset temperature; If described delivery temperature is greater than described the first preset temperature, open placeIn the mode of the second interior machine of stopped status, by the time that delivery temperature is higher, open in stopped status second inMachine, has reached and has increased the object of system refrigerant circulation, thereby has realized the delivery temperature that reduces the compressor of multi-connected machineTechnique effect, and then solved existing multi-gang air-conditioner and cannot effectively reduce the technical problem of delivery temperature.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, thisBright schematic description and description is used for explaining the present invention, does not form inappropriate limitation of the present invention. At accompanying drawingIn:
Fig. 1 is according to the flow chart of the control method of a kind of multi-connected machine of the embodiment of the present invention;
Fig. 2 is according to the flow chart of the control method of a kind of optional multi-connected machine of the embodiment of the present invention; And
Fig. 3 is according to the schematic diagram of the control device of a kind of multi-connected machine of the embodiment of the present invention.
Detailed description of the invention
In order to make those skilled in the art person understand better the present invention program, below in conjunction with in the embodiment of the present inventionAccompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, obviously, and described embodimentOnly the embodiment of a part of the present invention, instead of whole embodiment. Based on the embodiment in the present invention, abilityTerritory those of ordinary skill, not making the every other embodiment obtaining under creative work prerequisite, all should belong toThe scope of protection of the invention.
It should be noted that the term " first ", " in description of the present invention and claims and above-mentioned accompanying drawingTwo " be etc. for distinguishing similar object, and needn't be used for describing specific order or precedence. Should be appreciated that thisThe data that sample uses suitably can exchanged in situation, so as embodiments of the invention described herein can with exceptHere the order beyond those of diagram or description is implemented. In addition, term " comprises " and " having " and theyAny distortion, intention is to cover not exclusive comprising, for example, the process, the side that have comprised series of steps or unitThose steps or unit that method, system, product or equipment are not necessarily limited to clearly list, but can comprise do not have clearList or for these processes, method, product or equipment intrinsic other step or unit.
According to the embodiment of the present invention, a kind of embodiment of control method of multi-connected machine is provided, it should be noted that,Step shown in the flow chart of accompanying drawing can be carried out in the computer system such as one group of computer executable instructions, andAnd, although there is shown logical order in flow process, in some cases, can be to be different from order hereinCarry out shown or described step.
Fig. 1 is according to the flow chart of the control method of a kind of multi-connected machine of the embodiment of the present invention, as shown in Figure 1, and this controlMethod processed comprises the steps:
Step S102 is little at the ratio of the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machineIn the situation of default ratio, detect the delivery temperature of the compressor of multi-connected machine.
Step S104, judges whether delivery temperature is greater than the first preset temperature.
Step S106, if delivery temperature is greater than the first preset temperature, opens the second interior machine in stopped status, itsIn, the interior machine of multi-connected machine comprises the first interior machine and the second interior machine.
In above-described embodiment, represent that in open state interior machine is opened and the state of normal work, in stopped status tableShow that interior machine do not open the not state of normal work.
Adopt the embodiment of the present invention, by the first quantity of the first interior machine in open state and the interior machine of multi-connected machineThe ratio of total amount is less than in the situation of default ratio, detects the delivery temperature of the compressor of multi-connected machine; Judge delivery temperatureWhether be greater than the first preset temperature; If delivery temperature is greater than the first preset temperature, open in second of stopped statusThe mode of interior machine, by the time that delivery temperature is higher, opens the second interior machine in stopped status, has reached and has increased systemThe object of system refrigerant circulation, thus realize the technique effect that reduces the delivery temperature of the compressor of multi-connected machine, and thenSolve the technical problem that existing multi-gang air-conditioner cannot effectively reduce delivery temperature.
Particularly, multi-connected machine, under refrigeration mode, because environment temperature is high, and connects pipe range, singly drives or use interior machineWhen negligible amounts, the ratio of the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machine is less thanIn the situation of default ratio, system refrigerant circulation is few, easily produces overheated refrigerant, makes compressor air suction, exhaust temperatureSpend high phenomenon, this overheated refrigerant further mixes with the press oil of high temperature again, easily occurs exhaust protection shutdown,Reduce operational reliability, cause that client is discontented, even control (as the frequency reducing of exhaust limit, target exhaust control by otherElectric expansion valve etc.), minimum operation of press frequency, interior machine restricting element electric expansion valve step number has reached maximum,Due to the stack of all unfavorable factors, still there will be excessive discharge temperature phenomenon.
By above-described embodiment, when the situation of multi-connected machine machine negligible amounts in hot environment places an order out interior machine or useUnder, be also the first quantity at the first interior machine in open state in above-described embodiment and the interior machine total amount of multi-connected machineRatio be less than in the situation of default ratio, when the delivery temperature of the compressor of judging multi-connected machine is greater than the first default temperatureWhile spending, can open other the second interior machines in stopped status, thereby by the internal circulating load of increase system refrigerant, keep awayWhile having exempted from singly to drive interior machine, a small amount of system refrigerant continues heat absorption and overheated in tube connector, causes air-breathing and delivery temperature mistakeHigh phenomenon, thus realize the effect of the air-breathing and delivery temperature of the compressor of effective reduction multi-connected machine, ensure manyThe online phenomenon of shutting down because of delivery temperature protection of not occurring under various unfavorable conditions, the operation that has improved multi-connected machineReliability.
Alternatively, the step S106 in above-described embodiment opens and comprises in the second interior machine of stopped status: based on firstQuantity and interior machine total amount are determined second quantity of waiting to open interior machine; Opening quantity is the electronics of the second interior machine of the second quantityExpansion valve to the first aperture. Electric expansion valve in above-described embodiment is a kind of for controlling the refrigerant circulation of interior machineControl element.
By above-described embodiment, can come fast by the first quantity of the first interior machine in open state and interior machine total amountSpeed is effectively determined second quantity of waiting to open interior machine, and by adjust this second quantity in stopped status second inElectric expansion valve to the first aperture of machine, thus reach flexible control and open the electronics of the second interior machine in stopped statusThe object of expansion valve, has realized and has accurately controlled the coolant quantity that increases circulation, effectively reduces flexibly the compressor of multi-connected machineThe effect of delivery temperature.
In above-mentioned optional embodiment, determine based on the first quantity and interior machine total amount the second quantity bag of waiting to open interior machineDraw together: calculate the difference of interior machine total amount and the first quantity, obtain shutting down in multi-connected machine the 3rd quantity N of interior machine; In judgementWhether machine total amount is greater than predetermined number; If interior machine total amount is not more than predetermined number, using the 3rd quantity as the second quantity;If interior machine total amount is greater than predetermined number, determine in the following manner the second quantity M, wherein, M=x*N, wherein,Represent the 3rd quantity, M and N are natural number, and x is greater than 0 and be less than 1 real number.
In the above-described embodiments, can interior machine total amount is poor with the first quantity of the first interior machine in open state,Obtain the 3rd quantity of the interior machine in stopped status in multi-connected machine, and be greater than predetermined number when interior machine total amount, openAll interior machines in stopped status, now, wait that second quantity of opening interior machine equals the interior machine in stopped statusThe 3rd quantity; When interior machine total amount is not more than predetermined number, the interior machine of opening section in stopped status, now,The the second quantity M that waits to open interior machine is less than the 3rd quantity N of the interior machine in stopped status, and the second quantity M canFor preset multiple x the 3rd quantity N doubly, i.e. M=x*N, wherein, preset multiple x is greater than 0 real number that is less than 1.By above-described embodiment, can control flexibly the interior machine of opening according to the actual conditions of machine operation in multi-connected machine, therebyWhen effectively reducing delivery temperature, reach and saved the effect of utilizing electric energy.
Particularly, when singly open or open a small amount of in machine, and there is the shape of the excessive discharge temperature of the compressor of multi-connected machineWhen condition, how many interior machines are opened in judgement again, and this will see the situation of concrete interior machine sum, if when interior machine sum is less,For example, one has the interior machine of 6, in the time only having opened an interior machine, and of the first interior machine in open stateOne quantity is 1, can open so remaining all interior machines, waits that second quantity of opening interior machine equals in stoppingThe 3rd quantity of the interior machine of machine state, is also 5. Again for example, if one have 20 interior machines, only opened twoMachine in platform, and there is the phenomenon of excessive discharge temperature, the first quantity of the first interior machine in open state is 2,Can only open so the interior machine of remaining half quantity, the second quantity M that waits to open interior machine is the 3rd quantity N1/2nd, be also x=(1/2), M=(1/2) * N.
Alternatively, after unlatching quantity is electric expansion valve to the first aperture of the second interior machine of the second quantity, this controlMethod processed also comprises: when the delivery temperature of compressor that multi-connected machine detected is during lower than the second preset temperature, close secondThe electric expansion valve of interior machine, wherein, the first preset temperature is higher than the second preset temperature.
In the above-described embodiments, after the electric expansion valve of the second interior machine of opening the second quantity, the refrigerant of systemic circulationAmount increases, the phenomenon of having avoided the delivery temperature of the compressor of the overheated and multi-connected machine that occurs of a small amount of refrigerant to increase, effectivelyReduction delivery temperature, when this delivery temperature drops to lower than the second preset temperature, can close of the second quantityThe electric expansion valve of two interior machines. By above-described embodiment, can effectively control the delivery temperature of the compressor of multi-connected machine,Improve the stability of delivery temperature, ensure the traveling comfort of multi-connected machine system.
Alternatively, after unlatching quantity is electric expansion valve to the first aperture of the second interior machine of the second quantity, controlMethod also comprises: when the delivery temperature of compressor that multi-connected machine detected is during lower than the second preset temperature, by the second interior machineElectric expansion valve be adjusted to the second aperture, wherein, the first preset temperature is higher than the second preset temperature, the second aperture is littleIn the first aperture.
By above-described embodiment, after electric expansion valve to the first aperture of the second interior machine of opening the second quantity, beThe coolant quantity of system circulation increases to some extent, avoided because of singly open how many amounts open in less cause cold of circulating refrigerant when machineThe phenomenon that matchmaker is overheated, the delivery temperature of the compressor of multi-connected machine increases, effectively reduces delivery temperature, as this rowWhen temperature degree is reduced to lower than the second preset temperature, can be by the aperture of the electric expansion valve of the second interior machine by the first apertureTurn down to the second aperture, again make circulating refrigerant tail off, delivery temperature is gone up to some extent. By above-described embodiment,Can effectively control the delivery temperature of the compressor of multi-connected machine, be controlled in certain scope, improve exhaust temperatureThe stability of degree, the traveling comfort of guarantee multi-connected machine system.
Fig. 2 is according to the flow chart of the control method of a kind of optional multi-connected machine of the embodiment of the present invention, as shown in Figure 2,When the first preset temperature is 107 DEG C, the second preset temperature while being 100 DEG C, this control method can comprise the steps:
Step S202, the delivery temperature of the compressor of detection multi-connected machine.
Particularly, can, under the single on-mode of refrigeration, detect the pressure of multi-connected machine by detecting exhaust temperature-sensitive bag temperature valueThe delivery temperature of contracting machine.
Step S204, judges that whether the delivery temperature of compressor of multi-connected machine is higher than 107 DEG C.
Particularly, judge whether the delivery temperature of the compressor of multi-connected machine reaches 107 DEG C (i.e. first preset temperatures), whenJudge the delivery temperature of compressor of multi-connected machine higher than 107 DEG C, judged result is yes, performs step S206,When the delivery temperature of compressor of judging multi-connected machine is not higher than 107 DEG C, judged result is no, execution stepS208。
Step S206, opens the electric expansion valve of the second interior machine in stopped status, when detect delivery temperature lower than100 DEG C time, close the electric expansion valve of the second interior machine.
Particularly, can send instructions to other idle one or several interior machines (in stopped status by mainboardThe second interior machine), its electric expansion valve is opened to certain aperture or standard-sized sheet, the delivery temperature that measures to be checked is reduced to a certainFor example, when temperature value (i.e. the second predetermined threshold value, 100 DEG C), close the interior machine of not working (in of stopped statusTwo interior machines) electric expansion valve.
Step S208, by former control logic operation.
Particularly, can be according to machine in original control logic operation multi-connected machine, until the exhaust of the compressor of multi-connected machineTemperature is during higher than 107 DEG C, then detects the delivery temperature of the compressor of multi-connected machine.
The first preset temperature in above-described embodiment is higher than the second preset temperature, i.e. opening and closing are in stopped statusThe condition of the judgement temperature of the second interior machine is different, and delivery temperature decision content (preset by the first preset temperature and secondTemperature) can set according to variety classes compressor specifications or actual needs, also can make according to experience at ordinary times,And can suitably float, delivery temperature decision content (i.e. the first preset temperature and the second preset temperature) if set lower,Frequently open other indoor sets (i.e. the second interior machine), can produce some throttling noises. For avoiding above-mentioned phenomenon, canThe first preset temperature is set as to 107 DEG C, and the second preset temperature is set as 100 DEG C, wherein, due to 107 DEG C thanHigher temperatures, the machine (i.e. the second interior machine) in other of need to opening is lowered the temperature, and 100 DEG C of following temperature are reasonable, Ke YiguanClose other the second interior machines, between the first preset temperature and the second preset temperature, the temperature difference of 7 DEG C can make opening and closingTime cycle is relatively reasonable, is unlikely to the too little frequent switching of the temperature difference, or other interior machine overlong time of the too large unlatching of the temperature difference.
The first preset temperature and the second preset temperature in above-mentioned optional embodiment can be inputted by input screen, alsoBe user can according to self need to regulate the first preset temperature and the second preset temperature, thereby improved user relaxAdaptive is experienced.
According to the embodiment of the present invention on the other hand, also provide a kind of control device of multi-connected machine, Fig. 3 is according to thisThe schematic diagram of the control device of a kind of multi-connected machine of inventive embodiments, as shown in Figure 3, this control device comprises: detectUnit 20, judging unit 40 and unlatching unit 60.
Wherein, detecting unit 20, for the first quantity of the first interior machine in open state and the interior machine of multi-connected machineThe ratio of total amount is less than in the situation of default ratio, detects the delivery temperature of the compressor of multi-connected machine; Judging unit 40,Be used for judging whether delivery temperature is greater than the first preset temperature; Open unit 60, if be greater than first pre-for delivery temperatureIf temperature, opens the second interior machine in stopped status, wherein, the interior machine of multi-connected machine comprises the first interior machine and secondInterior machine.
Adopt the embodiment of the present invention, by the first quantity of the first interior machine in open state and the interior machine of multi-connected machineThe ratio of total amount is less than in the situation of default ratio, detects the delivery temperature of the compressor of multi-connected machine; Judge delivery temperatureWhether be greater than the first preset temperature; If delivery temperature is greater than the first preset temperature, open in second of stopped statusThe mode of interior machine, by the time that delivery temperature is higher, opens the second interior machine in stopped status, has reached and has increased systemThe object of system refrigerant circulation, thus realize the technique effect that reduces the delivery temperature of the compressor of multi-connected machine, and thenSolve the technical problem that existing multi-gang air-conditioner cannot effectively reduce delivery temperature.
Alternatively, open unit and comprise: determination module, in determining based on the first quantity and interior machine total amount and waiting to openThe second quantity of machine; Opening module, for opening the electric expansion valve to the first that quantity is the second interior machine of the second quantityAperture.
By above-described embodiment, can come fast by the first quantity of the first interior machine in open state and interior machine total amountSpeed is effectively determined second quantity of waiting to open interior machine, and by adjust this second quantity in stopped status second inElectric expansion valve to the first aperture of machine, thus reach flexible control and open the electronics of the second interior machine in stopped statusThe object of expansion valve, has realized and has accurately controlled the coolant quantity that increases circulation, effectively reduces flexibly the compressor of multi-connected machineThe effect of delivery temperature.
Alternatively, determination module comprises: computing module, for calculating the difference of interior machine total amount and the first quantity, obtainsThe 3rd quantity N of machine in shutting down in multi-connected machine; Judge module, for judging whether interior machine total amount is greater than predetermined number;The first processing module, if be not more than predetermined number for interior machine total amount, using the 3rd quantity as the second quantity; SecondProcessing module, if be greater than predetermined number for interior machine total amount, determines the second quantity M in the following manner, wherein,M=x*N, wherein, M and N are natural number, x is greater than 0 and be less than 1 real number.
In the above-described embodiments, can interior machine total amount is poor with the first quantity of the first interior machine in open state,Obtain the 3rd quantity of the interior machine in stopped status in multi-connected machine, and be greater than predetermined number when interior machine total amount, openAll interior machines in stopped status, now, wait that second quantity of opening interior machine equals the interior machine in stopped statusThe 3rd quantity; When interior machine total amount is not more than predetermined number, the interior machine of opening section in stopped status, now,The the second quantity M that waits to open interior machine is less than the 3rd quantity N of the interior machine in stopped status, and the second quantity M canFor preset multiple x the 3rd quantity N doubly, i.e. M=x*N, wherein, preset multiple x is greater than 0 real number that is less than 1.By above-described embodiment, can control flexibly the interior machine of opening according to the actual conditions of machine operation in multi-connected machine, therebyWhen effectively reducing delivery temperature, reach and saved the effect of utilizing electric energy.
Alternatively, this control device also comprises: closing module, for open quantity be the second interior machine of the second quantityElectric expansion valve to the first aperture after, when the delivery temperature of compressor that multi-connected machine detected is lower than the second default temperatureWhile spending, close the electric expansion valve of the second interior machine, wherein, the first preset temperature is higher than the second preset temperature.
In the above-described embodiments, after the electric expansion valve of the second interior machine of opening the second quantity, the refrigerant of systemic circulationAmount increases, the phenomenon of having avoided the delivery temperature of the compressor of the overheated and multi-connected machine that occurs of a small amount of refrigerant to increase, effectivelyReduction delivery temperature, when this delivery temperature drops to lower than the second preset temperature, can close of the second quantityThe electric expansion valve of two interior machines. By above-described embodiment, can effectively control the delivery temperature of the compressor of multi-connected machine,Improve the stability of delivery temperature, ensure the traveling comfort of multi-connected machine system.
Alternatively, this control device also comprises: adjusting module, for open quantity be the second interior machine of the second quantityElectric expansion valve to the first aperture after, when the delivery temperature of compressor that multi-connected machine detected is lower than the second default temperatureWhile spending, the electric expansion valve of the second interior machine is adjusted to the second aperture, wherein, the first preset temperature is default higher than secondTemperature, the second aperture is less than the first aperture.
By above-described embodiment, after electric expansion valve to the first aperture of the second interior machine of opening the second quantity, beThe coolant quantity of system circulation increases to some extent, avoided because of singly open how many amounts open in less cause cold of circulating refrigerant when machineThe phenomenon that matchmaker is overheated, the delivery temperature of the compressor of multi-connected machine increases, effectively reduces delivery temperature, as this rowWhen temperature degree is reduced to lower than the second preset temperature, can be by the aperture of the electric expansion valve of the second interior machine by the first apertureTurn down to the second aperture, again make circulating refrigerant tail off, delivery temperature is gone up to some extent. By above-described embodiment,Can effectively control the delivery temperature of the compressor of multi-connected machine, be controlled in certain scope, improve exhaust temperatureThe stability of degree, the traveling comfort of guarantee multi-connected machine system.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, do not haveThe part describing in detail, can be referring to the associated description of other embodiment.
In the several embodiment that provide in the application, should be understood that, disclosed technology contents, can pass through otherMode realize. Wherein, device embodiment described above is only schematically, the division of for example described unit,Can be that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assemblyCan in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out. Another point, instituteThe coupling each other showing or discuss or direct-coupling or communication connection can be by some interfaces, unit or mouldThe INDIRECT COUPLING of piece or communication connection can be electrical or other form.
The described unit as separating component explanation can or can not be also physically to separate, aobvious as unitThe parts that show can be or can not be also physical locations, can be positioned at a place, or also can be distributed toOn multiple unit. Can select according to the actual needs some or all of unit wherein to realize the present embodiment schemeObject.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, also canBe that the independent physics of unit exists, also can be integrated in a unit two or more unit. Above-mentioned integratedUnit both can adopt hardware form realize, also can adopt SFU software functional unit form realize.
If described integrated unit is realized also as independently production marketing or use using the form of SFU software functional unitTime, can be stored in a computer read/write memory medium. Based on such understanding, technical scheme of the present inventionThe all or part of of the part in other words prior art being contributed in essence or this technical scheme can produce with softwareThe form of product embodies, and this computer software product is stored in a storage medium, comprise some instructions with so thatObtain a computer equipment (can be personal computer, server or the network equipment etc.) and carry out each enforcement of the present inventionThe all or part of step of the described method of example. And aforesaid storage medium comprises: USB flash disk, read-only storage (ROM,Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive,The various media that can be program code stored such as magnetic disc or CD.
The above is only the preferred embodiment of the present invention, it should be pointed out that the ordinary skill people for the artMember, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvement and profitDecorations also should be considered as protection scope of the present invention.
Claims (10)
1. a control method for multi-connected machine, is characterized in that, comprising:
Ratio in the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machine is less than defaultIn the situation of ratio, detect the delivery temperature of the compressor of described multi-connected machine;
Judge whether described delivery temperature is greater than the first preset temperature;
If described delivery temperature is greater than described the first preset temperature, open the second interior machine in stopped status,
Wherein, the interior machine of described multi-connected machine comprises described the first interior machine and described the second interior machine.
2. control method according to claim 1, is characterized in that, opens the second interior machine bag in stopped statusDraw together:
Determine second quantity of waiting to open interior machine based on described the first quantity and described interior machine total amount;
Opening quantity is electric expansion valve to the first aperture of the second interior machine of described the second quantity.
3. control method according to claim 2, is characterized in that, total based on described the first quantity and described interior machineAmount is definite waits that second quantity of opening interior machine comprises:
Calculate the difference of described interior machine total amount and described the first quantity, obtain in described multi-connected machine the of machine in shutting downThree quantity N;
Judge whether described interior machine total amount is greater than predetermined number;
If described interior machine total amount is not more than described predetermined number, using described the 3rd quantity as described the second quantity;
If described interior machine total amount is greater than described predetermined number, determine in the following manner described the second quantity M,Wherein, M=x*N, wherein, M and N are natural number, x is greater than 0 and be less than 1 real number.
4. control method according to claim 2, is characterized in that, is the of described the second quantity opening quantityAfter electric expansion valve to the first aperture of two interior machines, described control method also comprises:
When the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature, close describedThe electric expansion valve of two interior machines, wherein, described the first preset temperature is higher than described the second preset temperature.
5. control method according to claim 2, is characterized in that, is the of described the second quantity opening quantityAfter electric expansion valve to the first aperture of two interior machines, described control method also comprises:
When the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature, by described secondThe electric expansion valve of interior machine is adjusted to the second aperture, and wherein, described the first preset temperature is default higher than described secondTemperature, described the second aperture is less than described the first aperture.
6. a control device for multi-connected machine, is characterized in that, comprising:
Detecting unit, for the first quantity of the first interior machine in open state and the interior machine total amount of multi-connected machineRatio be less than in the situation of default ratio, detect the delivery temperature of the compressor of described multi-connected machine;
Judging unit, for judging whether described delivery temperature is greater than the first preset temperature;
Open unit, if be greater than described the first preset temperature for described delivery temperature, open in shutting down shapeThe second interior machine of state,
Wherein, the interior machine of described multi-connected machine comprises described the first interior machine and described the second interior machine.
7. control device according to claim 6, is characterized in that, described unlatching unit comprises:
Determination module, for determining based on described the first quantity and described interior machine total amount the second number of waiting to open interior machineAmount;
Opening module is that the electric expansion valve to the first of the second interior machine of described the second quantity is opened for opening quantityDegree.
8. control device according to claim 7, is characterized in that, described determination module comprises:
Computing module, for calculating the difference of described interior machine total amount and described the first quantity, obtains described multi-connected machineThe 3rd quantity N of machine in middle shutdown;
Judge module, for judging whether described interior machine total amount is greater than predetermined number;
The first processing module, if be not more than described predetermined number for described interior machine total amount, by described the 3rd numberAmount is as described the second quantity;
The second processing module, if be greater than described predetermined number for described interior machine total amount, true in the following mannerFixed described the second quantity M, wherein, M=x*N, wherein, M and N are natural number, x is for being greater than 0 and be less than1 real number.
9. control device according to claim 7, is characterized in that, described control device also comprises:
Closing module, for open quantity be the electric expansion valve to the first of the second interior machine of described the second quantityAfter aperture, when the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature, closeThe electric expansion valve of described the second interior machine, wherein, described the first preset temperature is higher than described the second preset temperature.
10. control device according to claim 7, is characterized in that, described control device also comprises:
Adjusting module, for open quantity be the electric expansion valve to the first of the second interior machine of described the second quantityAfter aperture, when the delivery temperature of compressor that described multi-connected machine detected is during lower than the second preset temperature, by instituteThe electric expansion valve of stating the second interior machine is adjusted to the second aperture, and wherein, described the first preset temperature is higher than describedTwo preset temperatures, described the second aperture is less than described the first aperture.
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| CN106369757A (en) * | 2016-09-28 | 2017-02-01 | 珠海格力电器股份有限公司 | Multi-split compressor frequency control method and device and multi-split air conditioner |
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| KR100408994B1 (en) * | 2000-10-10 | 2003-12-06 | 엘지전자 주식회사 | Cooling drive indoor fan control method for multitype airconditioner |
| JP2002147824A (en) * | 2000-11-14 | 2002-05-22 | Hitachi Ltd | Air conditioner |
| CN100338410C (en) * | 2004-02-25 | 2007-09-19 | Lg电子株式会社 | Control method of complex heat pump |
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