CN104006445A - Multi-connected air conditioner and control method thereof - Google Patents
Multi-connected air conditioner and control method thereof Download PDFInfo
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- CN104006445A CN104006445A CN201310061205.6A CN201310061205A CN104006445A CN 104006445 A CN104006445 A CN 104006445A CN 201310061205 A CN201310061205 A CN 201310061205A CN 104006445 A CN104006445 A CN 104006445A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003507 refrigerant Substances 0.000 claims abstract description 80
- 238000001704 evaporation Methods 0.000 claims abstract description 70
- 230000008020 evaporation Effects 0.000 claims abstract description 65
- 230000001276 controlling effect Effects 0.000 claims description 27
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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Abstract
The invention discloses a multi-connected air conditioner and a control method thereof. Wherein, the multiple air conditioner includes: a compressor; the indoor units comprise a target indoor unit and a non-target indoor unit; the electronic expansion valves are respectively arranged on the liquid inlet pipes of the indoor units; and the controller is used for controlling the refrigerant evaporation superheat degree of the non-target indoor unit to be larger than the refrigerant evaporation superheat degree of the target indoor unit by adjusting the opening degrees of the plurality of electronic expansion valves. The invention solves the problem that the refrigeration effect of part of indoor units of the multi-connected air conditioner in the prior art is poor, thereby achieving the purpose of improving the overall refrigeration effect of the multi-connected air conditioner.
Description
Technical field
The present invention relates to air-conditioner field, in particular to a kind of multi-connected air conditioner device and control method thereof.
Background technology
When application multi-connected air conditioner device (one or more off-premises station and a plurality of indoor set) freezes to a plurality of rooms simultaneously, because the room area in each room is different with general layout, or indoor set type selecting is improper, can cause multi-connected air conditioner device when operation, some indoor set does not meet the demand in its room, place; Meanwhile, also exist the specified refrigerating capacity summation of indoor set to surpass the reasons such as long, the whole unit load of connecting leg is large between the specified refrigerating capacity of off-premises station, off-premises station and some indoor set in multi-connected air conditioner device, these all can cause part indoor set refrigeration bad.
For multi-connected air conditioner device in correlation technique, there is the poor problem of part indoor set refrigeration, not yet propose at present effective solution.
Summary of the invention
Main purpose of the present invention is to provide a kind of multi-connected air conditioner device and control method thereof, to solve multi-connected air conditioner device in prior art, has the poor problem of part indoor set refrigeration.
To achieve these goals, according to an aspect of the present invention, provide a kind of multi-connected air conditioner device, having comprised: compressor; Many indoor sets, many indoor sets are become with non-target indoor units by target indoor set; A plurality of electric expansion valves, are separately positioned on the feed tube of many indoor sets; And controller, for passing through to regulate the aperture of a plurality of electric expansion valves, the refrigerant evaporation degree of superheat of controlling non-target indoor set is greater than the refrigerant evaporation degree of superheat of target indoor set.
Further, multi-connected air conditioner device also comprises: a plurality of the first detecting units, are respectively used to detect the feed liquor temperature of many indoor sets; And a plurality of the second detecting units, be respectively used to detect the air outlet temperature of many indoor sets, wherein, controller is all connected with a plurality of the second detecting units with a plurality of the first detecting units, for regulate the aperture of electric expansion valve on the first indoor set according to the refrigerant evaporation degree of superheat of the first indoor set, wherein, the first indoor set is arbitrary indoor set in many indoor sets, and the refrigerant evaporation degree of superheat of the first indoor set is the poor of the air outlet temperature of the first indoor set and feed liquor temperature.
Further, a plurality of the first detecting units are separately positioned in the primary importance of many indoor set feed tubes, wherein, the primary importance on the first indoor set feed tube is between the first indoor set and the first electronic expansion, and the first electric expansion valve is the electric expansion valve on the first indoor set.
Further, controller is determined on target indoor set the regulation amount of electric expansion valve on electric expansion valve and non-target indoor set according to following formula:
Wherein, EXV
orderfor the regulation amount of electric expansion valve on target indoor set, △ T
orderfor the refrigerant evaporation super heat value of target indoor set, EXV
non-orderfor the regulation amount of electric expansion valve on non-target indoor set, △ T
non-orderfor the refrigerant evaporation super heat value of non-target indoor set, E1, E2 are parameter preset, and E1<E2.
Further, controller also raises once at interval of Preset Time for controlling the running frequency of compressor, multi-connected air conditioner device also comprises: the 3rd detecting unit, be arranged on the air intake duct of compressor, force value for detection of compressor air suction end, wherein, controller is connected with the 3rd detecting unit, for control the lift-off value of compressor operating frequency according to the force value of compressor air suction end.
Further, controller is determined the lift-off value of compressor operating frequency according to following formula:
K=C(T
low-T
low order),
Wherein, K is the lift-off value of compressor operating frequency, T
lowfor temperature value corresponding to the force value of compressor air suction end, T
low orderfor preset temperature value, C is parameter preset.
To achieve these goals, according to a further aspect in the invention, a kind of control method of multi-connected air conditioner device is provided, many indoor sets of multi-connected air conditioner device are become with non-target indoor units by target indoor set, control method comprises: by regulating the aperture of electric expansion valve on target indoor set and non-target indoor set, the refrigerant evaporation degree of superheat of controlling described non-target indoor set is greater than the refrigerant evaporation degree of superheat of described target indoor set.
Further, control method also comprises: on regulating target indoor set and non-target indoor set, in the aperture of electric expansion valve, the running frequency of controlling compressor in multi-connected air conditioner device raises once at interval of Preset Time.
Further, on regulating target indoor set and non-target indoor set, in the aperture of electric expansion valve, the running frequency of controlling compressor in multi-connected air conditioner device raises and once comprises at interval of Preset Time: the on-off state that obtains target indoor set; Since the first running frequency of controlling compressor constantly, at interval of Preset Time, raise once, wherein, first constantly for getting the moment of target indoor set start; And the aperture that regulates electric expansion valve on target indoor set and non-target indoor set since first moment.
Further, determine in the following manner the regulation amount of electronic expansion on target indoor set: the feed liquor temperature and the air outlet temperature that detect target indoor set; Calculate the poor of the air outlet temperature of target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of target indoor set; And the numerical value of the refrigerant evaporation super heat value of definite target indoor set and the difference of the first parameter preset is the regulation amount of electric expansion valve on target indoor set, determine in the following manner the regulation amount of electronic expansion on non-target indoor set: the feed liquor temperature and the air outlet temperature that detect non-target indoor set; Calculate the poor of the air outlet temperature of non-target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of non-target indoor set; And the numerical value of determining the refrigerant evaporation super heat value of non-target indoor set and the difference of the second parameter preset is the regulation amount of electric expansion valve on non-target indoor set, wherein, the first parameter preset is less than the second parameter preset.
Further, determine in the following manner the lift-off value of compressor operating frequency: the force value that detects compressor air suction end; Search the temperature value corresponding to force value of compressor air suction end, wherein, in multi-connected air conditioner device, store the temperature value corresponding to different pressures value of compressor air suction end; And the preset multiple of the difference of definite temperature value and preset temperature is the lift-off value of compressor operating frequency.
By the present invention, adopt the multi-connected air conditioner device that comprises following structure: compressor; Many indoor sets, many indoor sets are become with non-target indoor units by target indoor set; A plurality of electric expansion valves, are separately positioned on the feed tube of many indoor sets; And controller, for controlling by regulating the aperture of described a plurality of electric expansion valves, the refrigerant evaporation degree of superheat of controlling non-target indoor set is greater than the refrigerant evaporation degree of superheat of target indoor set.By controller, regulate in multi-connected air conditioner device on target indoor set the aperture of electric expansion valve in the aperture of electric expansion valve and non-target indoor set, the refrigerant evaporation degree of superheat of controlling non-target indoor set is greater than the refrigerant evaporation degree of superheat of target indoor set, having realized can be using the poor indoor set of refrigeration as target indoor set, control the refrigerant that refrigerant that target indoor set gets obtains more than non-target indoor set, to guarantee the refrigeration of target indoor set.Solve multi-connected air conditioner device in prior art and had the poor problem of part indoor set refrigeration, and then reached the integrally cooling effect that improves multi-connected air conditioner device.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the multi-connected air conditioner device of the embodiment of the present invention; And
Fig. 2 is according to the flow chart of the control method of the embodiment of the present invention.
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The embodiment of the present invention provides a kind of multi-connected air conditioner device, below multi-connected air conditioner device that the embodiment of the present invention is provided be specifically introduced:
Fig. 1 is according to the schematic diagram of the multi-connected air conditioner device of the embodiment of the present invention, as shown in Figure 1, the multi-connected air conditioner device of this embodiment comprises: off-premises station, many indoor sets, a plurality of electric expansion valves, compressor and controller, wherein, in Fig. 1, SO represents outside, SI represents indoor, 10 represent tracheae, 20 represent liquid pipe, 11 represent to be arranged on the tracheae temperature-sensitive bag on 1# indoor set, 21 represent to be arranged on the tracheae temperature-sensitive bag on 2# indoor set, 31 represent to be arranged on the tracheae temperature-sensitive bag on 3# indoor set, 12 represent to be arranged on the liquid pipe temperature-sensitive bag on 1# indoor set, 22 represent to be arranged on the liquid pipe temperature-sensitive bag on 2# indoor set, 32 represent to be arranged on the liquid pipe temperature-sensitive bag on 3# indoor set, P1, P2 and P3 all represent electric expansion valve.Not shown compressor and controller in Fig. 1, controller is the mainboard controller of multi-connected air conditioner device operation, compressor and controller are all arranged on off-premises station inside, off-premises station is connected by refrigerant pipe (comprising tracheae and liquid pipe) with Duo Tai indoor set, an electric expansion valve is all also set on the feed tube of every indoor set, controller is by regulating the aperture of electric expansion valve on each indoor set, the refrigerant evaporation degree of superheat of controlling target indoor set is less than the refrigerant evaporation degree of superheat of non-target indoor set, or controlling the aperture that regulates electric expansion valve when compressor operating frequency raises, if target indoor set is many indoor sets, control the refrigerant evaporation degree of superheat that the refrigerant evaporation degree of superheat on each target indoor set is all less than non-target indoor set, the situation that is many for non-target indoor set, the refrigerant evaporation degree of superheat that the refrigerant evaporation degree of superheat of controlling each target indoor set is all less than any non-target indoor set equally, in embodiments of the present invention, target indoor set is set by the user, it can be the poor indoor set of refrigeration.
The multi-connected air conditioner device of the embodiment of the present invention, by regulating the aperture of electric expansion valve on each indoor set, the refrigerant evaporation degree of superheat of coming controller to control target indoor set in multi-connected air conditioner device is less than the refrigerant evaporation degree of superheat of non-target indoor set, realized and controlled the refrigerant that refrigerant that target indoor set gets obtains more than non-target indoor set, guaranteeing the refrigeration of target indoor set.Solve multi-connected air conditioner device in prior art and had the poor problem of part indoor set refrigeration, and then reached the integrally cooling effect that improves multi-connected air conditioner device.
Further, the multi-connected air conditioner device of the embodiment of the present invention also comprises a plurality of the first detecting units and a plurality of the second detecting unit, wherein, a plurality of the first detecting units can be a plurality of temperature-sensitive bags (hereinafter referred to as liquid pipe temperature-sensitive bags), a temperature-sensitive bag is set on the feed tube of an indoor set, a plurality of liquid pipe temperature-sensitive bags are used for respectively detecting the feed liquor temperature of many indoor sets, a plurality of the second detecting units can be equally also a plurality of temperature-sensitive bags (hereinafter referred to as tracheae temperature-sensitive bags), a temperature-sensitive bag is set on the escape pipe of an indoor set, a plurality of tracheae temperature-sensitive bags are used for respectively detecting the air outlet temperature of many indoor sets.Controller is connected with a plurality of tracheae temperature-sensitive Bao Jun with a plurality of liquid pipe temperature-sensitive bags, according to the refrigerant evaporation degree of superheat of each indoor set, determine the regulation amount of electric expansion valve on each indoor set, , according to the refrigerant evaporation degree of superheat of 1# indoor set, determine the regulation amount of electric expansion valve on 1# indoor set, according to the refrigerant evaporation degree of superheat of 2# indoor set, determine the regulation amount of electric expansion valve on 2# indoor set, by that analogy, according to the refrigerant evaporation degree of superheat of n# indoor set, determine the regulation amount of electric expansion valve on n# indoor set, wherein, the air outlet temperature that the refrigerant evaporation degree of superheat of certain indoor set is this indoor set and feed liquor temperature poor.
Preferably, liquid pipe temperature-sensitive bag on each indoor set is separately positioned in the primary importance of each indoor set feed tube, this primary importance is the position between indoor set and the electric expansion valve of indoor set,, liquid pipe temperature-sensitive bag on n# indoor set is arranged between n# indoor set and the electric expansion valve of n# indoor set, also, the electric expansion valve of the relative n# indoor set of liquid pipe temperature-sensitive bag of n# indoor set, the former more close n# indoor set.By liquid pipe temperature temperature-sensitive bag is arranged between electric expansion valve and indoor set, can get more exactly the feed liquor temperature of indoor set.The tracheae temperature-sensitive bag of each indoor set is separately positioned on the gas gathering manifold of each indoor set, between the large valve interface of indoor set and this indoor machine evaporation.
In embodiments of the present invention, according to the refrigerant evaporation degree of superheat of each indoor set, determine that the regulation amount of electronic expansion on each indoor set can determine according to following formula the regulation amount of electric expansion valve:
Wherein, EXV
orderfor the regulation amount of electric expansion valve on target indoor set, △ T
orderfor the refrigerant evaporation super heat value of target indoor set, EXV
non-orderfor the regulation amount of electric expansion valve on non-target indoor set, △ T
non-orderfor the refrigerant evaporation super heat value of non-target indoor set, EXV
order=△ T
order-E
1represent to determine that the regulation amount of electric expansion valve on target indoor set is numerically equal to the numerical value of the refrigerant evaporation degree of superheat of target indoor set and the difference of the first parameter preset E1, EXV
non-order=△ T
non-order-E
2represent to determine that the regulation amount of electric expansion valve on non-target indoor set is numerically equal to the numerical value of the refrigerant evaporation super heat value of non-target indoor set and the difference of the second parameter preset E2, E1, E2 are parameter preset, and E1<E2, in embodiments of the present invention, E1 can value 1, E2 value is 2≤E2≤4, that is, the regulation amount of controlling electric expansion valve is numerically equal to the poor of the refrigerant evaporation degree of superheat and parameter preset.
Further, in embodiments of the present invention, the air outlet temperature that the feed liquor temperature that controller can detect liquid pipe temperature-sensitive bag at interval of 40 seconds (also can be set to At All Other Times as required), tracheae temperature temperature-sensitive bag detect once obtains, and correspondingly calculate the once refrigerant evaporation degree of superheat of each indoor set, and the regulation amount of correspondingly determining electric expansion valve on one group of each indoor set, then each electric expansion valve is carried out to Primary regulation, as long as the regulation amount of determining is non-vanishing, can regulate electric expansion valve.
Further, controller also raises once at interval of Preset Time for controlling the running frequency of compressor, particularly, the multi-connected air conditioner device of the embodiment of the present invention also comprises the 3rd detecting unit, the 3rd detecting unit can be pressure sensor, be used for detecting the force value of compressor air suction end, controller is connected with the 3rd detecting unit, for control the lift-off value of compressor operating frequency according to the force value of compressor air suction end.In embodiments of the present invention, pressure sensor can preferably be arranged on the air intake duct of compressor, the low-pressure lateral pressure value of air-conditioner unit accurately to be detected, then the low-pressure lateral pressure value detecting is converted to evaporating temperature corresponding to refrigerant under this pressure, and according to following formula, determines the lift-off value of compressor operating frequency:
K=C(T
low-T
low order),
Wherein, K is the lift-off value of compressor operating frequency, T
lowfor temperature value corresponding to the force value of compressor air suction end (that is, evaporating temperature corresponding to refrigerant under the force value detecting), T
low orderfor preset temperature value, C is parameter preset, K=C(T
low-T
low order) represent that the lift-off value of determining compressor operating frequency is numerically equal to T
lowwith T
low orderdifference numerical value C doubly, in embodiments of the present invention, preset temperature T
low ordervalue can be-3 ℃≤T
low order≤ 9 ℃, the value of C is tested and is determined according to the difference of air-conditioning unit, can be 1≤C≤5 in embodiments of the present invention, and the running frequency of controlling compressor raises according to Preset Time, the minimum value of Preset Time can be 1min, and maximum occurrences can be 10min.
By the running frequency of interval rising compressor, can reduce the unit low pressure of multi-connected air conditioner device, and then reduce the evaporating temperature of unit, whole refrigerant circulation promotes, made up non-target indoor set and contributed the refrigerant loss to target indoor set, reached the refrigeration of indoor set is compensated.
Take the 1# indoor set shown in Fig. 1 as target indoor set (, VIP indoor set), 2# and 3# indoor set are that non-target indoor set further illustrates the multi-connected air conditioner device in the embodiment of the present invention, while supposing the operation of multi-connected air conditioner device, 1# and 3# indoor set refrigerating operaton, 2# indoor set is shut down, controller can be controlled EXV1=△ T1-1, EXV3=△ T3-E2, (2≤E2≤4), wherein, △ T1 is the refrigerant evaporation degree of superheat of 1# indoor set, EXV1 is the regulation amount of electric expansion valve P1 on 1# indoor set, △ T3 is the refrigerant evaporation degree of superheat of 3# indoor set, EXV3 is the regulation amount of electric expansion valve P3 on 3# indoor set, different by controlling electronic expansion valve opening regulated quantity like this, be equivalent to improve the refrigerant evaporation degree of superheat of non-VIP operation indoor set (3# indoor set), on 3# indoor set, the aperture EXV3 of electric expansion valve is less than the aperture EXV1 of electric expansion valve on 1# indoor set, comparatively speaking, the refrigerant circulation of 3# indoor set reduces, the refrigerant reducing has all been supplied to machine in 1#, thereby make the interior machine coolant quantity of 1# more than non-control situation, to improve the refrigeration of machine in 1#.If machine is also started shooting in 2#, the regulation amount that can control equally 2# indoor set and the electric expansion valve of 3# indoor set is consistent,, controls the regulation amount EXV2=(△ T2-E2) of electric expansion valve P2 on 2# indoor set that is.
It should be noted that, in embodiments of the present invention, target indoor set can be selected by user before start, to realize according to user, experiences to determine the not good indoor set of refrigeration; Also can be by operating personnel when carrying out the project installation of multi-connected air conditioner device, according to actual installation environment, select certain or certain several indoor sets as target indoor set.
The embodiment of the present invention also provides a kind of control method of multi-connected air conditioner device, this control method is for controlling the multi-connected air conditioner device that embodiment of the present invention foregoing provides, particularly, the control method of the multi-connected air conditioner device that the embodiment of the present invention provides is mainly by regulating the aperture of electric expansion valve on target indoor set and non-target indoor set, the refrigerant evaporation degree of superheat of controlling described non-target indoor set is greater than the refrigerant evaporation degree of superheat of described target indoor set, wherein, many indoor sets of described multi-connected air conditioner device are become with described non-target indoor units by described target indoor set.
The embodiment of the present invention is by regulating in multi-connected air conditioner device on target indoor set the aperture of electric expansion valve in the aperture of electric expansion valve and non-target indoor set, the refrigerant evaporation degree of superheat of controlling non-target indoor set is greater than the refrigerant evaporation degree of superheat of target indoor set, having realized can be using the poor indoor set of refrigeration as target indoor set, control the refrigerant that refrigerant that target indoor set gets obtains more than non-target indoor set, to guarantee the refrigeration of target indoor set.Solve multi-connected air conditioner device in prior art and had the poor problem of part indoor set refrigeration, and then reached the integrally cooling effect that improves multi-connected air conditioner device.
Preferably, the control method of the embodiment of the present invention also comprises: on regulating target indoor set and non-target indoor set in the aperture of electric expansion valve, running frequency to compressor in multi-connected air conditioner device is controlled, be specially, the running frequency of controlling compressor raises once at interval of Preset Time, wherein, predeterminated frequency is the maximum frequency of operation of compressor in multi-connected air conditioner device.
By the running frequency of interval rising compressor, can reduce the unit low pressure of multi-connected air conditioner device, and then reduce the evaporating temperature of unit, whole refrigerant circulation promotes, made up non-target indoor set and contributed the refrigerant loss to target indoor set, reached the refrigeration of indoor set is compensated.
Fig. 2 is the particular flow sheet of the control method of above preferred embodiment according to the present invention, as shown in Figure 2, in the running frequency to compressor, when on target indoor set, on the aperture of electric expansion valve and non-target indoor set, the aperture of electric expansion valve regulates, be specially, first the on-off state of target indoor set is obtained, , step S201, and when getting the start of target indoor set, the start of record object indoor set is (hereinafter referred to as first constantly) constantly, then since the first running frequency of controlling compressor constantly, at interval of Preset Time, raise once, , step S202, simultaneously, since first, regulate aperture target indoor set and upper electric expansion valve non-target indoor set constantly, , step S203.
By the on-off state of target indoor set is obtained, realized at target indoor set and Once you begin having put into operation, just regulate the aperture of electric expansion valve and the running frequency of raising compressor simultaneously, in time the refrigeration of indoor set is compensated fast, reach the effect that improves compensation efficiency.
Particularly, can determine in the following manner in embodiments of the present invention the regulation amount of electronic expansion on certain target indoor set:
Detect feed liquor temperature and the air outlet temperature of this target indoor set, particularly, can detect feed liquor temperature by the liquid pipe temperature-sensitive bag being arranged on this target indoor set feed tube, by the tracheae temperature-sensitive bag being arranged on this target indoor set escape pipe, detect air outlet temperature;
Calculate the poor of the air outlet temperature of target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of this target indoor set;
Determine that the refrigerant evaporation super heat value of target indoor set and the difference of the first parameter preset are the regulation amount of electric expansion valve on target indoor set, that is the regulation amount of, determining electric expansion valve is numerically equal to the poor of the refrigerant evaporation degree of superheat and the first parameter preset.
Determine in the following manner the regulation amount of electronic expansion on non-target indoor set:
Detect feed liquor temperature and the air outlet temperature of non-target indoor set, equally, can detect feed liquor temperature by the liquid pipe temperature-sensitive bag being arranged on this non-target indoor set feed tube, by the tracheae temperature-sensitive bag being arranged on this non-target indoor set escape pipe, detect air outlet temperature;
Calculate the poor of the air outlet temperature of non-target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of non-target indoor set;
Determine that the refrigerant evaporation super heat value of non-target indoor set and the difference of the second parameter preset are the regulation amount of electric expansion valve on non-target indoor set,, the regulation amount of determining electric expansion valve is numerically equal to the poor of the refrigerant evaporation degree of superheat and the second parameter preset, wherein, the first parameter preset is less than the second parameter preset.
In the control method of the embodiment of the present invention, the air outlet temperature that the feed liquor temperature that can detect liquid pipe temperature-sensitive bag at interval of 40 seconds (also can be set to At All Other Times as required), tracheae temperature temperature-sensitive bag detect once obtains, and correspondingly calculate the once refrigerant evaporation degree of superheat of each indoor set, and the regulation amount of correspondingly determining electric expansion valve on one group of each indoor set, then each electric expansion valve is carried out to Primary regulation, as long as the regulation amount of determining is non-vanishing, can regulate electric expansion valve.
Determine in the following manner the lift-off value of compressor operating frequency:
The force value that detects compressor air suction end, particularly, can detect by being arranged on the pressure sensor of compressor air suction end the force value of compressor air suction end;
Search the temperature value corresponding to force value of compressor air suction end, wherein, in multi-connected air conditioner device, store the temperature value corresponding to different pressures value of compressor air suction end, that is, the force value detecting is converted to evaporating temperature corresponding to refrigerant under this pressure;
The preset multiple of determining the difference of temperature value and preset temperature is the lift-off value of compressor operating frequency.
As can be seen from the above description, the present invention has realized the drawback of avoiding the indoor mechanism cold poor effect of part in multi-connected air conditioner device, has reached the integrally cooling effect that multi-connected air conditioner device unit is provided.
It should be noted that, in the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a multi-connected air conditioner device, is characterized in that, comprising:
Compressor;
Many indoor sets, described many indoor sets are become with non-target indoor units by target indoor set;
A plurality of electric expansion valves, are separately positioned on the feed tube of described many indoor sets; And
Controller, for passing through to regulate the aperture of described a plurality of electric expansion valves, the refrigerant evaporation degree of superheat of controlling described non-target indoor set is greater than the refrigerant evaporation degree of superheat of described target indoor set.
2. multi-connected air conditioner device according to claim 1, is characterized in that, described multi-connected air conditioner device also comprises:
A plurality of the first detecting units, are respectively used to detect the feed liquor temperature of described many indoor sets; And
A plurality of the second detecting units, are respectively used to detect the air outlet temperature of described many indoor sets,
Wherein, described controller is all connected with described a plurality of the second detecting units with described a plurality of the first detecting units, for regulate the aperture of electric expansion valve on described the first indoor set according to the refrigerant evaporation degree of superheat of the first indoor set, wherein, described the first indoor set is arbitrary indoor set in described many indoor sets, and the refrigerant evaporation degree of superheat of described the first indoor set is the poor of the air outlet temperature of described the first indoor set and feed liquor temperature.
3. multi-connected air conditioner device according to claim 2, it is characterized in that, described a plurality of the first detecting unit is separately positioned in the primary importance of described many indoor set feed tubes, wherein, primary importance on described the first indoor set feed tube is between described the first indoor set and the first electronic expansion, and described the first electric expansion valve is the electric expansion valve on described the first indoor set.
4. multi-connected air conditioner device according to claim 2, is characterized in that, described controller is determined on described target indoor set the regulation amount of electric expansion valve on electric expansion valve and described non-target indoor set according to following formula:
Wherein, EXV
orderfor the regulation amount of electric expansion valve on described target indoor set, △ T
orderfor the refrigerant evaporation super heat value of described target indoor set, EXV
non-orderfor the regulation amount of electric expansion valve on described non-target indoor set, △ T
non-orderfor the refrigerant evaporation super heat value of described non-target indoor set, E1, E2 are parameter preset, and E1<E2.
5. according to the multi-connected air conditioner device described in any one in claim 1 to 4, it is characterized in that, described controller also raises once at interval of Preset Time for controlling the running frequency of described compressor, and described multi-connected air conditioner device also comprises:
The 3rd detecting unit, is arranged on the air intake duct of described compressor, for detection of the force value of described compressor air suction end,
Wherein, described controller is connected with described the 3rd detecting unit, for control the lift-off value of described compressor operating frequency according to the force value of described compressor air suction end.
6. multi-connected air conditioner device according to claim 5, is characterized in that, described controller is determined the lift-off value of described compressor operating frequency according to following formula:
K=C(T
low-T
low order),
Wherein, K is the lift-off value of described compressor operating frequency, T
lowfor temperature value corresponding to the force value of described compressor air suction end, T
low orderfor preset temperature value, C is parameter preset.
7. the control method of a multi-connected air conditioner device, many indoor sets of described multi-connected air conditioner device are become with non-target indoor units by target indoor set, it is characterized in that, described control method is by regulating the aperture of electric expansion valve on described target indoor set and described non-target indoor set, and the refrigerant evaporation degree of superheat of controlling described non-target indoor set is greater than the refrigerant evaporation degree of superheat of described target indoor set.
8. control method according to claim 7, it is characterized in that, described control method also comprises: on regulating described target indoor set and described non-target indoor set, in the aperture of electric expansion valve, the running frequency of controlling compressor in described multi-connected air conditioner device raises once at interval of Preset Time.
9. control method according to claim 8, it is characterized in that, on regulating described target indoor set and described non-target indoor set, in electronic expansion valve opening, the running frequency of controlling compressor in described multi-connected air conditioner device raises and once comprises at interval of Preset Time:
Obtain the on-off state of described target indoor set;
Since the first running frequency of controlling described compressor constantly, at interval of described Preset Time, raise once, wherein, described first constantly for getting the moment of described target indoor set start; And
From the described first aperture that constantly starts to regulate electric expansion valve described target indoor set and described non-target indoor set.
10. according to the control method described in any one in claim 7 to 9, it is characterized in that,
Determine in the following manner the regulation amount of electronic expansion on described target indoor set:
Detect feed liquor temperature and the air outlet temperature of described target indoor set;
Calculate the poor of the air outlet temperature of described target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of described target indoor set; And
The numerical value of determining the refrigerant evaporation super heat value of described target indoor set and the difference of the first parameter preset is the regulation amount of electric expansion valve on described target indoor set,
Determine in the following manner the regulation amount of electronic expansion on described non-target indoor set:
Detect feed liquor temperature and the air outlet temperature of described non-target indoor set;
Calculate the poor of the air outlet temperature of described non-target indoor set and feed liquor temperature, obtain the refrigerant evaporation degree of superheat of described non-target indoor set; And
The numerical value of determining the refrigerant evaporation super heat value of described non-target indoor set and the difference of the second parameter preset is the regulation amount of electric expansion valve on described non-target indoor set, and wherein, described the first parameter preset is less than described the second parameter preset.
11. control methods according to claim 8 or claim 9, is characterized in that, determine in the following manner the lift-off value of described compressor operating frequency:
Detect the force value of described compressor air suction end;
Search the temperature value corresponding to force value of described compressor air suction end, wherein, in described multi-connected air conditioner device, store the temperature value corresponding to different pressures value of described compressor air suction end; And
The preset multiple of determining the difference of described temperature value and preset temperature value is the lift-off value of described compressor operating frequency.
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