CN1275700A - Improved refrigerating system for one driving multiple-unit air conditioner - Google Patents
Improved refrigerating system for one driving multiple-unit air conditioner Download PDFInfo
- Publication number
- CN1275700A CN1275700A CN00111066A CN00111066A CN1275700A CN 1275700 A CN1275700 A CN 1275700A CN 00111066 A CN00111066 A CN 00111066A CN 00111066 A CN00111066 A CN 00111066A CN 1275700 A CN1275700 A CN 1275700A
- Authority
- CN
- China
- Prior art keywords
- pulses
- tin
- ton
- compressor
- aperture correction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to an improved refrigeration system capable of controlling several air-conditioners, and is characterized by that on the basis of original refrigeration system for controlling three air-conditioners the electronic expansion valves are respectively placed on the indoor and outdoor machines and equipped with correspondent temp.-measuring sensor, and a computer is used to control opening of said valve according to proper control parameters to make the distribution of its refrigerating agent correspond to operation working condition of said system so as to obtain high energy efficiency ratio and implement high-efficiency energy-saving.
Description
The present invention relates to the improvement of air-conditioner, the improved refrigeration system of especially a kind of multi-split air conditioner, it belongs to the air conditioner refrigerating technical field.
In existing multi-split air conditioner refrigeration system, all adopt the mode of using capillary or electric expansion valve to carry out throttling in the outside.Commercially available a kind of one drags three air-conditioners, has adopted refrigeration system as shown in Figure 1.This system mainly contains: compressor (1), first wife's liquid reservoir (2), cross valve (3), device for drying and filtering (5), muffler (21), indoor throttling electric expansion valve (23), (24), (26), outdoor heat converter (4) and corresponding precooling capillary (15) thereof, (16), three indoor heat converters (17), (18), (28) and the corresponding cold capillary of mistake (19), (20), (27).Draw a backflow branch road outside in the machine: turn in first wife's liquid reservoir (2) by backflow capillary (25) and backflow liquid reservoir (22); Press exhaust point for measuring temperature (T is set
1), air-breathing point for measuring temperature (T
2), point for measuring temperature (T after the throttling
3), point for measuring temperature (T is judged in defrosting
4), refrigerant outlet point for measuring temperature (T
5,6,7).This refrigeration system can in time be regulated refrigerant flow when air-conditioner operating condition off-design operating mode, this flow and the operating mode that departs from are complementary, and has higher operational energy efficiency ratio.But also there is following shortcoming in this refrigeration system: during (1) refrigeration, cold-producing medium because pressure reduces, can't overcome the flow resistance in the pipeline after the throttling of outside, makes the transmission range of cold-producing medium short.For the large-scale multi-split air conditioner of the remote refrigerant conveying of needs, this refrigeration modes is no longer suitable.(2) under the situation that indoor set quantity increases, need to increase the electric expansion valve of corresponding every indoor set and cross cold capillary in the indoor, owing to be subjected to the restriction on off-premises station structure and the space, generally speaking, the indoor set quantity that is connected is no more than 5, can't satisfy many of connections, as the requirement of tens indoor sets.
Purpose of the present invention is exactly the shortcoming that will overcome above-mentioned refrigeration system, designs the improved refrigeration system of a kind of multi-split air conditioner.This improved refrigeration system can not only be when operation of air conditioner operating mode off-design operating mode, can in time regulate refrigerant flow, this flow and the operating mode that departs from are complementary, also pass through in the indoor throttling, cold-producing medium can be carried at a distance, and make the platform number that connects indoor set not be subjected to restriction on off-premises station structure and the space.
Task of the present invention is realized by following technical scheme, developed the improved refrigeration system of a kind of multi-split air conditioner, it comprises: compressor, first wife's liquid reservoir, cross valve, device for drying and filtering, many indoor heat exchangers, outdoor heat exchanger and outdoor electric expansion valve thereof, be located between the heat exchanger of indoor and outdoor and compressor first wife liquid reservoir on return the throttling branch road and return throttle capillary tube, be located at the exhaust gas temperature sensor on the compressor exhaust pipe, i.e. exhaust point for measuring temperature T
1, be located at the suction temperature sensor on the compressor suction duct, promptly air-breathing point for measuring temperature T
2, the information that all sensors is gathered converts and sends the control parameter of control respective electronic expansion valve and compressor operation through computer, thus the regulating working conditions of control system cold-producing medium.Also be provided with pressure at expulsion switch and fluid separator on compressor exhaust pipe, the bottom oil exit pipe of this separator inserts in first wife's liquid reservoir by the oil return capillary; On the pipeline between this separator and the cross valve, connect and draw another merogenesis relief circuit, this loop turns on the compressor suction duct by unloading magnetic valve, unloading capillary, is provided with gas-liquid separator between suction temperature sensor on the air intake duct and relief circuit; The gentle pipe end of liquid pipe at every indoor heat exchanger is provided with liquid pipe temperature sensor and tracheae temperature sensor respectively, i.e. liquid pipe point for measuring temperature Tin and tracheae point for measuring temperature Ton (n is 5 above natural numbers); Gather between the stop valve of pipeline and the outdoor electric expansion valve in the parallel connection of all indoor heat exchangers and to be provided with outdoor liquid reservoir; Corresponding indoor electric expansion valve is set on the liquid pipe between each liquid pipe point for measuring temperature Tin and the outdoor liquid reservoir.
The improved refrigeration system of this multi-split air conditioner can be provided with defrosting and judge temperature transducer between designed outdoor heat exchanger and device for drying and filtering, point for measuring temperature T promptly defrosts
3, this point for measuring temperature T
3With environment point for measuring temperature T
4Constitute defrosting and judge the control parameter.
The improved refrigeration system of this multi-split air conditioner, designed outdoor electric expansion valve, its pulse range is: 0～480 pulse, this valve selected reference aperture in heating operation is: 125 pulses, the selected reference aperture is in refrigerating operaton: 350 pulses.
The improved refrigeration system of this multi-split air conditioner, designed indoor electric expansion valve, its pulse range is: 0～500 pulse, this valve selected reference aperture in heating operation is: 300 pulses, the selected reference aperture is in refrigerating operaton: 200 pulses.
The improved refrigeration system of this multi-split air conditioner, designed oil return capillary, its internal diameter is chosen to be: φ 0.5～1.2mm, length is chosen to be: 600～1500mm.
The improved refrigeration system of this multi-split air conditioner, designed unloading capillary, its internal diameter is chosen to be: φ 1.0～1.8mm, length is chosen to be: 300～600mm.
The improved refrigeration system of this multi-split air conditioner, designed electronic Expansion Valve Control parameter is carried out regulating working conditions by following control scheme:
One, at first regulate according to every indoor heat exchanger degree of superheat Tin-Ton:
(1) when-1 ℃＜Tin-Ton≤1 ℃, all indoor electric expansion valves keep the benchmark aperture, and promptly the aperture correction value of all this valves is 0;
(2) when 1 ℃＜Tin-Ton≤3 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is: 5 pulses/time;
(3) when 3 ℃＜Tin-Ton≤6 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is: 15 pulses/time;
(4) when 6 ℃＜Tin-Ton, all this valves are in refrigerating operaton, and aperture correction amplitude is: 25 pulses/time;
(5) when-3 ℃＜Tin-Ton≤-1 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-5 pulses/time;
(6) when-6＜Tin-Ton≤-3 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-15 pulses/time;
(7) when Tin-Ton≤-6 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-25 pulses/time;
When the corresponding aperture amplitude of the indoor electric expansion valve of indoor heat exchanger was regulated in above-mentioned (1)～(7), outdoor electric expansion valve kept benchmark aperture state;
Two, and then according to the delivery temperature T of compressor
1Regulate: wherein the prerequisite to the corresponding aperture correction of all indoor electric expansion valves is: when regulating according to Tin-Ton, the aperture correction amplitude of all this valves is 0 o'clock, again according to working as 60 ℃＜T of this delivery temperature
1In the time of≤96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is: 2～1 pulses/time; As this delivery temperature T
1In the time of≤60 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is :-2 pulses/time; As this delivery temperature T
1In the time of＞96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is: 5 pulses/time;
Three, once more, (1), when refrigerating operaton, the mean value Ton of the tracheae point for measuring temperature Ton of all indoor heat exchangers of foundation adjusts, wherein the prerequisite to all this valve opening corrections is: when the degree of superheat Tin-Ton according to the indoor heat exchanger of all this valve correspondences regulates, the aperture correction amplitude of all this valves is 0 o'clock;
(1) when-1 ℃＜Ton-Ton≤3 ℃, the aperture correction amplitude of all valves is 0;
(2) when 3 ℃＜Ton-Ton≤5 ℃, the aperture correction amplitude of all valves is: 5 pulses/time;
(3) when 5 ℃＜Ton-Ton≤7 ℃, the aperture correction amplitude of all valves is: 10 pulses/time;
(4) when 7 ℃＜Ton-Ton, the aperture correction amplitude of all valves is: 15 pulses/time;
(5) when-2 ℃＜Ton-Ton≤-1, the aperture correction amplitude of all valves is :-5 pulses/time;
(6) when-4 ℃＜Ton-Ton≤-2, the aperture correction amplitude of all valves is :-10 pulses/time;
(7) when Ton-Ton≤-4, the aperture correction amplitude of all valves is :-15 pulses/time;
(2), when heating operation, adjust according to the mean value Tin of the liquid pipe point for measuring temperature Tin of all indoor heat exchangers:
(1) when-2 ℃＜Tin-Tin≤2 ℃, be 0 to the aperture correction amplitude of this valve;
(2) when 2 ℃＜Tin-Tin≤5 ℃, be to the aperture correction amplitude of this valve :-5 pulses/time;
(3) when 5 ℃＜Tin-Tin≤7 ℃, be to the aperture correction amplitude of this valve :-10 pulses/time;
(4) when 7 ℃＜Tin-Tin, be to the aperture correction amplitude of this valve :-15 pulses/time;
(5) when-4 ℃＜Tin-Tin≤-2 ℃, be to the aperture correction amplitude of this valve: 5 pulses/time;
(6) when-6 ℃＜Tin-Tin≤-4 ℃, be to the aperture correction amplitude of this valve: 10 pulses/time;
When Tin-Tin≤-6 ℃, be to the aperture correction amplitude of this valve: 15 pulses/time;
Four, also have, be in operation and carried out in the oil return running every 4 hour time, the aperture amendment scheme of all indoor electric expansion valves is:
(1) in refrigerating operaton, during the oil return running, the aperture correction value of Kai Ji indoor electric expansion valve is not: 300 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is: 350 pulses, i.e. benchmark opening value;
(2) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve was not: 5 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is 0;
When (3) oil return was turned round in heating operation, the aperture correction value of Kai Ji indoor electric expansion valve was not: 80 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is 0;
(4) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve is not: 55 pulses, the aperture correction value of the indoor electric expansion valve of having started shooting was 0.
The improved refrigeration system of this multi-split air conditioner, designed defrosting judge that the control parameter is as follows:
(1) works as T
4≤ 2 ℃ and T
4-T
3＞9 ℃, the duration, all indoor and outdoor electric expansion valves were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(2) work as T
4＞2 ℃ and T
3＜-5, the duration, all indoor and outdoor electric expansion valves were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(3) work as T
4〉=12 ℃ of duration, defrosting finished, and recovers heating operation during 1 minute or lasting defrosting time＞9 minute.
The improved refrigeration system of this multi-split air conditioner, the control parameter of designed compressor operation is as follows:
One, the Compressor Discharge Pressure switch is closed in the normal state in the system, and when pressure at expulsion P 〉=3.0Mpa, the contact of this pressure switch disconnects, and by testing circuit information is imported single-chip microcomputer, carries out pressure at expulsion protection control; Under aforementioned common state:
(1) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency V
0 1During＞105Hz, control compressor upper limiting frequency V
1 On=100Hz;
(2) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 104＞V
2°＞during 95Hz, control compressor upper limiting frequency V
2 On=90Hz;
(3) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 94＞V
3°＞during 85Hz, control compressor upper limiting frequency V
3 On=80Hz;
(4) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 84＞V
4°＞during 75Hz, control compressor upper limiting frequency V
On 4=70Hz;
(5) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 74＞V
5°＞during 65Hz, control compressor upper limiting frequency V
5 On=60Hz;
(6) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency V
6°＜during 64Hz, control compressor upper limiting frequency V
6 On=50Hz enters limit guard mode frequently;
Two, in the system Compressor Discharge Pressure switch limit frequently the guard mode lower contact disconnect, when pressure at expulsion P 〉=3.0Mpa, compressor is every 80 seconds, downward modulation frequency V
Protect/80 "=10Hz is until downward modulation frequency V
0 Down=30Hz is the lower frequency limit of compressor;
Three, in the system compressor at lower frequency limit V
0 DownIf in=30Hz when running, is during pressure at expulsion P row 〉=3.0Mpa, during the contact disconnection of this pressure switch, also can open feather valve, directly guide to the suction side of compressor, reduce pressure at expulsion≤2.4Mpa by this valve and unloading capillary, until this pressure switch closure, remove Unloading Control; Feather valve cuts out, and this moment, compressor recovered the instantaneous frequency state of a control, promptly common state.
Its advantage of the improved refrigeration system of the present invention is: (1) indoor adopts electric expansion valve to carry out the flow adjustment, by being arranged on point for measuring temperature T different in the native system
1, T
2, T
3... the temperature parameter information of Tin, Ton, export electromagnetic pulse through the computer conversion, thereby control the aperture of corresponding electric expansion valve, realize the adjusting of cold-producing medium.(2) with the throttling process of refrigerating operaton, undertaken, high-pressure refrigerant is carried at a distance by changing in the indoor in the outside originally.(3) electric expansion valve is placed on the indoor, can makes the increase of indoor set quantity not be subjected to the restriction in off-premises station structure and space.The key point that the present invention is different from other refrigeration systems is exactly the position difference of the setting of electric expansion valve, i.e. point for measuring temperature T
1, T
2, T
3... the position setting of Tin, Ton and the design of relevant parameter.(3) in system, be provided with oil eliminator, the lubricating oil separation in the compressor air-discharging can be come out, and get back to compressor by the oil return capillary.(4) in system, be provided with pressure switch and feather valve, under the too high situation of Compressor Discharge Pressure, by the pressure switch detected pressures, and the control by frequency-changeable compressor frequency reducing control and feather valve, reduce pressure at expulsion, make the refrigeration system safe operation.
Embodiments of the invention further specify as followsly in conjunction with the accompanying drawings, and protection scope of the present invention is not limited only among the embodiment.
Fig. 1 drags the refrigeration system flow chart of three air-conditioners for one of prior art
Fig. 2 is the refrigeration system flow chart that drags six air-conditioners improved
Make one one improved refrigeration system of dragging six air-conditioner KR-120W/BP referring to Fig. 2, its system flow chart is as follows: comprising: compressor 1, pressure switch 2, fluid separator 3, cross valve 4, off-premises station heat exchanger 5, device for drying and filtering 6, reservoir 8, heat exchanger indoor unit 10, stop valve 11, stop valve 12 is provided with a compressor air-discharging point for measuring temperature T in compressor 1 exhaust side
1, promptly the compressor exhaust temperature sensor 18; Be provided with a compressor air suction point for measuring temperature T in the compressor suction side
2, promptly the compressor air suction temperature sensor 19; On the heat exchanger 5 of off-premises station, be provided with the point for measuring temperature T that detects the frosting state
3, i.e. temperature transducer 20 is judged in defrosting; And outdoor environment point for measuring temperature T is arranged at the off-premises station peripheral hardware
4, (not drawing among the figure).All sensor 18,19,20 information of being gathered convert and send the control parameter of control respective electronic expansion valve and compressor 1 running through computer, thus the regulating working conditions of control system cold-producing medium.Important improvement of the present invention is: also be provided with pressure at expulsion switch 2 and fluid separator 3 on compressor 1 blast pipe.The bottom oil exit pipe of this separator 3 inserts in first wife's liquid reservoir 23 by oil return capillary 17.Connect on the pipeline between this separator 3 and the cross valve 4 and draw another merogenesis relief circuit 14,15, this loop is by unloading magnetic valve 14, and unloading capillary 15 turns on compressor 1 air intake duct.Be provided with gas-liquid separator 13 between suction temperature sensor 19 on air intake duct and the relief circuit 14,15.Gather in the parallel connection of all indoor set heat exchangers 10 between the electric expansion valve 7 of the stop valve 11 of pipeline and off-premises station and be provided with outdoor liquid reservoir 8.On the liquid pipe between each liquid pipe point for measuring temperature Tin and the outdoor liquid reservoir 8, corresponding indoor electric expansion valve 9 is set.Be provided with liquid pipe point for measuring temperature Tin (n is 5 above natural numbers), i.e. liquid pipe temperature sensor 21 at every heat exchanger indoor unit 10 and 9 corresponding of electric expansion valves thereof.Tracheae end at every indoor set interchanger is provided with tracheae point for measuring temperature Ton (n is 5 above natural numbers), and promptly the tracheae temperature sensor 22.The indoor electric expansion valve 9 that the present invention selects is only worker's machine LAM of company type electric expansion valve.The bore of this valve is 1.8mm, and nominal capacity is 2 standard tons.The outdoor electric expansion valve of selecting 7 is the aigret palace EDM of company type electric expansion valve as originally one dragging the total flow of many refrigeration systems to adjust valve, and the bore of this valve is 3.0mm, and nominal capacity is 7 standard tons.
The improved refrigeration system of this multi-split air conditioner can be provided with defrosting and judge temperature transducer 20 between designed outdoor heat exchanger 5 and device for drying and filtering 6, point for measuring temperature T promptly defrosts
3, this point for measuring temperature T
3With environment point for measuring temperature T
4Constitute defrosting and judge the control parameter.
The improved refrigeration system of this multi-split air conditioner, designed outdoor electric expansion valve 7, its pulse range is: 0～480 pulse, this valve 7 selected reference aperture in heating operation is: 125 pulses, the selected reference aperture is in refrigerating operaton: 350 pulses.
The improved refrigeration system of this multi-split air conditioner, designed indoor electric expansion valve 9, its pulse range is: 0～500 pulse, this valve 9 selected reference aperture in heating operation is: 300 pulses, the selected reference aperture is in refrigerating operaton: 200 pulses.
The improved refrigeration system of this multi-split air conditioner, designed oil return capillary 17, its internal diameter is chosen to be: φ 0.8mm, length is chosen to be: 1000mm.
The improved refrigeration system of this multi-split air conditioner, designed unloading capillary 15, its internal diameter is chosen to be: φ 1.6mm, length is chosen to be: 400mm.
The improved refrigeration system of this multi-split air conditioner, the control parameter of designed electric expansion valve 7,9 is carried out regulating working conditions by following control scheme:
Three, at first regulate according to every indoor heat exchanger 10 degree of superheat Tin-Ton:
(1) when-1 ℃＜Tin-Ton≤1 ℃, all indoor electric expansion valves 9 keep the benchmark apertures, and the aperture correction value of promptly all this valves 9 is 0;
(2) when 1 ℃＜Tin-Ton≤3 ℃, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is: 5 pulses/time;
(3) when 3 ℃ (during Tin-Ton≤6 ℃, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is: 15 pulses/time;
(4) when 6 ℃＜Tin-Ton, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is: 25 pulses/time;
(5) when-3 ℃＜Tin-Ton≤-1 ℃, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is :-5 pulses/time;
(6) when-6＜Tin-Ton≤-3 ℃, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is :-15 pulses/time;
(7) when Tin-Ton≤-6 ℃, all this valves 9 are in refrigerating operaton, and aperture correction amplitude is :-25 pulses/time;
When the corresponding aperture amplitude of the indoor electric expansion valve 9 of indoor heat exchanger 10 was regulated in above-mentioned (1)～(7), outdoor electric expansion valve 7 kept benchmark aperture states;
Four, and then according to the delivery temperature T of compressor 1
1Regulate: wherein the prerequisite to all indoor electric expansion valve 9 corresponding aperture corrections is: when regulating according to Tin-Ton, the aperture correction amplitude of all this valves 9 is 0 o'clock, again according to working as 60 ℃＜T of this delivery temperature
1In the time of≤96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves 9 is: 2～1 pulses/time; As this delivery temperature T
1In the time of≤60 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves 9 is :-2 pulses/time; As this delivery temperature T
1In the time of＞96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves 9 is: 5 pulses/time;
Three, once more, (1), when refrigerating operaton, the mean value Ton of the tracheae point for measuring temperature Ton of all indoor heat exchangers 10 of foundation adjusts, wherein the prerequisite to all these valve 9 aperture corrections is: when the degree of superheat Tin-Ton according to the indoor heat exchanger 10 of all these valve 9 correspondences regulates, the aperture correction amplitude of all this valves 9 is 0 o'clock;
(1) when-1 ℃＜Ton-Ton≤3 ℃, the aperture correction amplitude of all this valves 9 is 0;
(2) when 3 ℃＜Ton-Ton≤5 ℃, the aperture correction amplitude of all this valves 9 is: 5 pulses/time;
(3) when 5 ℃＜Ton-Ton≤7 ℃, the aperture correction amplitude of all this valves 9 is: 10 pulses/time;
(4) when 7 ℃＜Ton-Ton, the aperture correction amplitude of all this valves 9 is: 15 pulses/time;
(5) when-2 ℃＜Ton-Ton≤-1, the aperture correction amplitude of all this valves 9 is :-5 pulses/time;
(6) when-4 ℃＜Ton-Ton≤-2, the aperture correction amplitude of all this valves 9 is :-10 pulses/time;
(7) when Ton-Ton≤-4, the aperture correction amplitude of all this valves 9 is :-15 pulses/time;
(2), when heating operation, adjust according to the mean value Tin of the liquid pipe point for measuring temperature Tin of all indoor heat exchangers 10:
(1) when-2 ℃＜Tin-Tin≤2 ℃, be 0 to the aperture correction amplitude of this valve 9;
(2) when 2 ℃＜Tin-Tin≤5 ℃, be to the aperture correction amplitude of this valve 9 :-5 pulses/time;
(3) when 5 ℃＜Tin-Tin≤7 ℃, be to the aperture correction amplitude of this valve 9 :-10 pulses/time;
(4) when 7 ℃＜Tin-Tin, be to the aperture correction amplitude of this valve 9 :-15 pulses/time;
(5) when-4 ℃＜Tin-Tin≤-2 ℃, be to the aperture correction amplitude of this valve 9: 5 pulses/time;
(6) when-6 ℃＜Tin-Tin≤-4 ℃, be to the aperture correction amplitude of this valve 9: 10 pulses/time;
When Tin-Tin≤-6 ℃, be to the aperture correction amplitude of this valve 9: 15 pulses/time;
Four, also have, be in operation and carried out in the oil return running every 4 hour time, the aperture amendment scheme of all indoor electric expansion valves 9 is:
(1) in refrigerating operaton, during the oil return running, the aperture correction value of Kai Ji indoor electric expansion valve 9 is not: 300 pulses, and the aperture correction value of the indoor electric expansion valve 9 of having started shooting is: 350 pulses, i.e. benchmark opening value;
(2) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve 9 was not: 5 pulses, and the aperture correction value of the indoor electric expansion valve 9 of having started shooting is 0;
When (3) oil return was turned round in heating operation, the aperture correction value of Kai Ji indoor electric expansion valve 9 was not: 80 pulses, and the aperture correction value of the indoor electric expansion valve 9 of having started shooting is 0;
(4) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve 9 is not: 55 pulses, the aperture correction value of the indoor electric expansion valve 9 of having started shooting was 0.
The improved refrigeration system of this multi-split air conditioner, designed defrosting judge that the control parameter is as follows:
(1) works as T
4≤ 2 ℃ and T
4-T
3＞9 ℃, the duration, all indoor and outdoor electric expansion valves 9,7 were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(2) work as T
4＞2 ℃ and T
3＜-5, the duration, all indoor and outdoor electric expansion valves 9,7 were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(3) work as T
4〉=12 ℃ of duration, defrosting finished, and recovers heating operation during 1 minute or lasting defrosting time＞9 minute.
The improved refrigeration system of this multi-split air conditioner, the control parameter of designed compressor 1 running is as follows:
One, compressor 1 pressure at expulsion switch 2 is closed in the normal state in the system, and when pressure at expulsion P 〉=3.0Mpa, the contact of this pressure switch 2 disconnects, and by testing circuit information is imported single-chip microcomputer, carries out pressure at expulsion protection control; Under aforementioned common state:
(1) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency V
0 1During＞105Hz., the upper limiting frequency V of control compressor 1
1 On=100Hz;
(2) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency 104＞V
2°＞during 95Hz, the upper limiting frequency V of control compressor 1
2 On=90Hz;
(3) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency 94) V
3°＞during 85Hz, control compressor 1 upper limiting frequency V
3 On=80Hz;
(4) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency 84＞V
4°＞during 75Hz, the upper limiting frequency V of control compressor 1
On 4=70Hz;
(5) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency 74＞V
5°＞during 65Hz, the upper limiting frequency V of control compressor 1
5 On=60Hz;
(6) if moment that disconnects when these pressure switch 2 contacts is compressor 1 instantaneous frequency V
6°＜during 64Hz, the upper limiting frequency V of control compressor 1
6 On=50Hz enters limit guard mode frequently;
Two, in the system compressor 1 pressure at expulsion switch 2 limit frequently the guard mode lower contact disconnect as pressure at expulsion P 〉=3.0Mpa the time, compressor 1 is reduced frequency V every 80 seconds
Protect/80 "=10Hz is until downward modulation frequency V
0 Down=30Hz is the lower frequency limit of compressor 1;
Three, in the system compressor 1 at lower frequency limit V
0 DownDuring=30Hz running, if during pressure at expulsion P row 〉=3.0Mpa, when the contact of this pressure switch 2 disconnects, also can open feather valve 14, directly guide to the suction side of compressor 1 by this valve 14 and unloading capillary 15, reduce pressure at expulsion≤2.4Mpa,, remove Unloading Control until these pressure switch 2 closures; Feather valve 14 cuts out, and compressor 1 recovers the instantaneous frequency state of a control at this moment, promptly common state.
Claims (9)
1, the improved refrigeration system of a kind of multi-split air conditioner, it comprises: compressor, first wife's liquid reservoir, cross valve, device for drying and filtering, many indoor heat exchangers, outdoor heat exchanger and outdoor electric expansion valve thereof, be located between the heat exchanger of indoor and outdoor and compressor first wife liquid reservoir on return the joint branch road and return throttle capillary tube, be located at the exhaust gas temperature sensor on the compressor exhaust pipe, i.e. exhaust point for measuring temperature T
1, be located at the suction temperature sensor on the compressor suction duct, promptly air-breathing point for measuring temperature T
2, the information that all sensors is gathered converts and sends the control parameter of control respective electronic expansion valve and compressor operation through computer, thus the regulating working conditions of control system cold-producing medium; It is characterized in that: also be provided with pressure at expulsion switch and fluid separator on compressor exhaust pipe, the bottom oil exit pipe of this separator inserts in first wife's liquid reservoir by the oil return capillary; On the pipeline between this separator and the cross valve, connect and draw another merogenesis relief circuit, this loop turns on the compressor suction duct by unloading magnetic valve, unloading capillary, is provided with gas-liquid separator between suction temperature sensor on the air intake duct and relief circuit; The gentle pipe end of liquid pipe at every indoor heat exchanger is provided with liquid pipe temperature sensor and tracheae temperature sensor respectively, i.e. liquid pipe point for measuring temperature Tin and tracheae point for measuring temperature Ton (n is 5 above natural numbers); Gather between the stop valve of pipeline and the outdoor electric expansion valve in the parallel connection of all indoor heat exchangers and to be provided with outdoor liquid reservoir; Corresponding indoor electric expansion valve is set on the liquid pipe between each liquid pipe point for measuring temperature Tin and the outdoor liquid reservoir.
2, the improved refrigeration system of multi-split air conditioner according to claim 1 is characterized in that: defrosting can be set between described outdoor heat exchanger and device for drying and filtering judge temperature transducer, point for measuring temperature T promptly defrosts
3, this point for measuring temperature T
3With environment point for measuring temperature T
4Constitute defrosting and judge the control parameter.
3, the improved refrigeration system of multi-split air conditioner according to claim 1, it is characterized in that: described outdoor electric expansion valve, its pulse range is: 0～480 pulse, this valve selected reference aperture in heating operation is: 125 pulses, the selected reference aperture is in refrigerating operaton: 350 pulses.
4, the improved refrigeration system of multi-split air conditioner according to claim 1, it is characterized in that: described indoor electric expansion valve, its pulse range is: 0～500 pulse, this valve selected reference aperture in heating operation is: 300 pulses, the selected reference aperture is in refrigerating operaton: 200 pulses.
5, the improved refrigeration system of multi-split air conditioner according to claim 1: it is characterized in that: described oil return capillary, its internal diameter is chosen to be: φ 0.5～1.2mm, length is chosen to be: 600～1500mm.
6, the improved refrigeration system of multi-split air conditioner according to claim 1 is characterized in that: described unloading capillary, its internal diameter is chosen to be: φ 1.0～1.8mm, length is chosen to be: 300～600mm.
7, the improved refrigeration system of multi-split air conditioner according to claim 1 is characterized in that: described electronic Expansion Valve Control parameter is carried out regulating working conditions by following control scheme:
One, at first regulate according to every indoor heat exchanger degree of superheat Tin-Ton:
(1) when-1 ℃＜Tin-Ton≤1 ℃, all indoor electric expansion valves keep the benchmark aperture, and promptly the aperture correction value of all this valves is 0;
(2) when 1 ℃＜Tin-Ton≤3 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is: 5 pulses/time;
(3) when 3 ℃＜Tin-Ton≤6 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is: 15 pulses/time;
(4) when 6 ℃＜Tin-Ton, all this valves are in refrigerating operaton, and aperture correction amplitude is: 25 pulses/time;
(5) when-3 ℃＜Tin-Ton≤-1 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-5 pulses/time;
(6) when-6＜Tin-Ton≤-3 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-15 pulses/time;
(7) when Tin-Ton≤-6 ℃, all this valves are in refrigerating operaton, and aperture correction amplitude is :-25 pulses/time;
When the corresponding aperture amplitude of the indoor electric expansion valve of indoor heat exchanger was regulated in above-mentioned (1)～(7), outdoor electric expansion valve kept benchmark aperture state;
Two, and then according to the delivery temperature T of compressor
1Regulate: wherein the prerequisite to the corresponding aperture correction of all indoor electric expansion valves is: when regulating according to Tin-Ton, the aperture correction amplitude of all this valves is 0 o'clock, and foundation (1) is as 60 ℃＜T of this delivery temperature again
1In the time of≤96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is: 2～1 pulses/time; (2) as this delivery temperature T
1In the time of≤60 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is :-2 pulses/time; (3) as this delivery temperature T
1In the time of＞96 ℃, the aperture correction amplitude of refrigeration (or heating) being moved all this valves is: 5 pulses/time;
Three, once more, (1), when refrigerating operaton, the mean value Ton of the tracheae point for measuring temperature Ton of all indoor heat exchangers of foundation adjusts, wherein the prerequisite to all this valve opening corrections is: when the degree of superheat Tin-Ton according to the indoor heat exchanger of all this valve correspondences regulates, the aperture correction amplitude of all this valves is 0 o'clock;
(1) when-1 ℃＜Ton-Ton≤3 ℃, the aperture correction amplitude of all valves is 0;
(2) when 3 ℃＜Ton-Ton≤5 ℃, the aperture correction amplitude of all valves is: 5 pulses/time;
(3) when 5 ℃＜Ton-Ton≤7 ℃, the aperture correction amplitude of all valves is: 10 pulses/time;
(4) when 7 ℃＜Ton-Ton, the aperture correction amplitude of all valves is: 15 pulses/time;
(5) when-2 ℃＜Ton-Ton≤-1, the aperture correction amplitude of all valves is :-5 pulses/time;
(6) when-4 ℃＜Ton-Ton≤-2, the aperture correction amplitude of all valves is :-10 pulses/time;
(7) when Ton-Ton≤-4, the aperture correction amplitude of all valves is :-15 pulses/time;
(2), when heating operation, adjust according to the mean value Tin of the liquid pipe point for measuring temperature Tin of all indoor heat exchangers:
(1) when-2 ℃＜Tin-Tin≤2 ℃, be 0 to the aperture correction amplitude of this valve;
(2) when 2 ℃＜Tin-Tin≤5 ℃, be to the aperture correction amplitude of this valve :-5 pulses/time;
(3) when 5 ℃＜Tin-Tin≤7 ℃, be to the aperture correction amplitude of this valve :-10 pulses/time;
(4) when 7 ℃＜Tin-Tin, be to the aperture correction amplitude of this valve :-15 pulses/time;
(5) when-4 ℃＜Tin-Tin≤-2 ℃, be to the aperture correction amplitude of this valve: 5 pulses/time;
(6) when-6 ℃＜Tin-Tin≤-4 ℃, be to the aperture correction amplitude of this valve: 10 pulses/time;
(7) when Tin-Tin≤-6 ℃, be to the aperture correction amplitude of this valve: 15 pulses/time;
Four, also have, be in operation and carried out in the oil return running every 4 hour time, the aperture amendment scheme of all indoor electric expansion valves is:
(1) in refrigerating operaton, during the oil return running, the aperture correction value of Kai Ji indoor electric expansion valve is not: 300 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is: 350 pulses, i.e. benchmark opening value;
(2) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve was not: 5 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is 0;
When (3) oil return was turned round in heating operation, the aperture correction value of Kai Ji indoor electric expansion valve was not: 80 pulses, and the aperture correction value of the indoor electric expansion valve of having started shooting is 0;
(4) when this oil return running was removed, the aperture correction value of Kai Ji indoor electric expansion valve is not: 55 pulses, the aperture correction value of the indoor electric expansion valve of having started shooting was 0.
8, the improved refrigeration system of multi-split air conditioner according to claim 1 is characterized in that: described defrosting judges that the control parameter is as follows:
(1) when T4≤2 ℃ and T4-T3＞9 ℃, the duration, all indoor and outdoor electric expansion valves were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(2) when T4＞2 ℃ and T3＜-5, the duration, all indoor and outdoor electric expansion valves were opened sufficient aperture 350 pulses more than 2 minutes the time, continued defrosting time≤9 minutes;
(3) when T4 〉=12 ℃ duration during 1 minute or lasting defrosting time＞9 minute, defrosting finishes, and recovers heating operation.
9, the improved refrigeration system of multi-split air conditioner according to claim 1 is characterized in that: the control parameter of described compressor operation is as follows:
One, the Compressor Discharge Pressure switch is closed in the normal state in the system, and when pressure at expulsion P 〉=3.0Mpa, the contact of this pressure switch disconnects, and by testing circuit information is imported single-chip microcomputer, carries out pressure at expulsion protection control; Under aforementioned common state:
(1) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency V
1°＞during 105Hz, control compressor upper limiting frequency V
1 On=100Hz;
(2) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 104＞V
2°＞during 95Hz, control compressor upper limiting frequency V
2 On=90Hz;
(3) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 94＞V
3°＞during 85Hz, control compressor upper limiting frequency V
3 On=80Hz;
(4) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 84＞V
4°＞during 75Hz, control compressor upper limiting frequency V
4 On=70Hz;
(5) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency 74＞V
5°＞during 65Hz, control compressor upper limiting frequency V
5 On=60Hz;
(6) when the moment that this pressure switch contact disconnects, if compressor instantaneous frequency V
6°＜during 64Hz, control compressor upper limiting frequency V
6 On=50Hz enters limit guard mode frequently;
Two, in the system Compressor Discharge Pressure switch limit frequently the guard mode lower contact disconnect, when pressure at expulsion P 〉=3.0Mpa, compressor is every 80 seconds, downward modulation frequency V
Protect/80 "=10Hz, the straight frequency V that ends downward modulation
0 Down=30Hz is the lower frequency limit of compressor;
Three, in the system compressor at lower frequency limit V
0 DownIf in=30 Hz when running, is during pressure at expulsion P row 〉=3.0Mpa, during the contact disconnection of this pressure switch, also can open feather valve, directly guide to the suction side of compressor, reduce pressure at expulsion≤2.4Mpa by this valve and unloading capillary, until this pressure switch closure, remove Unloading Control; Feather valve cuts out, and this moment, compressor recovered the instantaneous frequency state of a control, promptly common state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00111066A CN1104605C (en) | 2000-06-02 | 2000-06-02 | Improved refrigerating system for one driving multiple-unit air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00111066A CN1104605C (en) | 2000-06-02 | 2000-06-02 | Improved refrigerating system for one driving multiple-unit air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1275700A true CN1275700A (en) | 2000-12-06 |
| CN1104605C CN1104605C (en) | 2003-04-02 |
Family
ID=4581007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00111066A Expired - Fee Related CN1104605C (en) | 2000-06-02 | 2000-06-02 | Improved refrigerating system for one driving multiple-unit air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1104605C (en) |
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147144A (en) * | 2011-04-07 | 2011-08-10 | 宁波奥克斯电气有限公司 | Control method for preventing overhigh exhaust temperature of direct-current variable-frequency heat pump air conditioner |
| CN102353121A (en) * | 2011-09-13 | 2012-02-15 | Tcl空调器(中山)有限公司 | Control method of refrigerant flow of multi-connected unit |
| CN102478296A (en) * | 2010-11-24 | 2012-05-30 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN102563789A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Multi-split heat pump air conditioning system and control method thereof |
| CN101960232B (en) * | 2008-02-28 | 2012-11-07 | 大金工业株式会社 | Refrigeration device |
| CN101603701B (en) * | 2008-06-13 | 2012-12-19 | Tcl集团股份有限公司 | Auxiliary heating method of air conditioner with auxiliary heating device |
| CN103206820A (en) * | 2013-04-27 | 2013-07-17 | 海尔集团公司 | Expansion valve opening controlling method for preventing oscillating of expansion valve |
| CN101592388B (en) * | 2008-05-27 | 2013-10-30 | 海尔集团公司 | Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor |
| CN103542489A (en) * | 2012-07-12 | 2014-01-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method, device and system of air conditioner system |
| CN103982987A (en) * | 2014-05-07 | 2014-08-13 | 广东美的暖通设备有限公司 | Method and system for preventing bias flowing of refrigerant in multi-split air conditioner and multi-split air conditioner |
| CN104180563A (en) * | 2013-05-27 | 2014-12-03 | 珠海格力电器股份有限公司 | Method for returning oil during heating of multi-online system |
| CN104697121A (en) * | 2015-03-27 | 2015-06-10 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and indoor unit control method thereof |
| CN104748427A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Unloading component for multi-split system and multi-split system with same |
| CN104748429A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multiple on-line system |
| CN104896818A (en) * | 2014-03-04 | 2015-09-09 | 海尔集团公司 | Low-pressure safe refrigerant filling air conditioner |
| CN105229395A (en) * | 2013-08-08 | 2016-01-06 | 富士通将军股份有限公司 | Conditioner |
| CN105526746A (en) * | 2014-10-21 | 2016-04-27 | 株式会社鹭宫制作所 | Control device and control method of refrigerated storage |
| CN105546753A (en) * | 2016-01-04 | 2016-05-04 | 广东美的暖通设备有限公司 | Air conditioner control method and device and air conditioner |
| CN105546731A (en) * | 2015-12-23 | 2016-05-04 | 宁波奥克斯电气股份有限公司 | Control method for heating of household central air conditioner in transition season |
| CN105627434A (en) * | 2016-01-05 | 2016-06-01 | 青岛海尔空调器有限总公司 | Radial floor heating air conditioner and control method |
| CN105737333A (en) * | 2016-02-22 | 2016-07-06 | 广东美的暖通设备有限公司 | Multiple on-line system and mode switching control method thereof |
| CN105823122A (en) * | 2016-01-05 | 2016-08-03 | 青岛海尔空调器有限总公司 | Radiation type wall-mounted air conditioner and control method thereof |
| CN107461877A (en) * | 2017-07-19 | 2017-12-12 | 青岛海尔空调电子有限公司 | A kind of multiple on-line system defrosting control method |
| CN107514743A (en) * | 2017-07-27 | 2017-12-26 | 青岛海尔空调器有限总公司 | A kind of air-conditioner control method, control device and air conditioner |
| CN107559953A (en) * | 2017-08-15 | 2018-01-09 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN107917505A (en) * | 2017-11-07 | 2018-04-17 | 珠海格力电器股份有限公司 | A kind of multi-split air conditioner and its outdoor unit defrosting control method |
| CN109028495A (en) * | 2018-09-18 | 2018-12-18 | 青岛海尔空调电子有限公司 | The method, apparatus and computer storage medium of air conditioner coolant flow quantity control |
| CN109028494A (en) * | 2018-09-18 | 2018-12-18 | 青岛海尔空调电子有限公司 | The method, apparatus and computer storage medium of air conditioner coolant flow quantity control |
| CN109631236A (en) * | 2018-12-14 | 2019-04-16 | 广东Tcl智能暖通设备有限公司 | Multi-connected air conditioner device and its Defrost method |
| CN110145905A (en) * | 2019-04-25 | 2019-08-20 | 安徽美博智能电器有限公司 | A kind of control method and device of compressor |
| CN111271900A (en) * | 2019-12-10 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Compressor oil return control method and system and air conditioner |
| CN111397239A (en) * | 2020-03-13 | 2020-07-10 | 海信（山东）空调有限公司 | Multi-split air conditioning system and method for reducing noise of multi-split air conditioning system |
| CN111520875A (en) * | 2020-03-24 | 2020-08-11 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioner |
| CN111895604A (en) * | 2020-07-24 | 2020-11-06 | 海信（山东）空调有限公司 | Air conditioner |
| CN113531783A (en) * | 2021-07-21 | 2021-10-22 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
| CN113654196A (en) * | 2021-07-15 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method for controlling self-cleaning in indoor heat exchanger |
| CN113883681A (en) * | 2021-09-28 | 2022-01-04 | 青岛海尔中央空调有限公司 | Control method for refrigeration system and refrigeration system |
| WO2023098067A1 (en) * | 2021-12-02 | 2023-06-08 | 青岛海尔空调器有限总公司 | Control method and device for pressure relief of air conditioner, and air conditioner |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892154B (en) * | 2005-07-08 | 2011-07-13 | 海尔集团公司 | Return-oil control method of multi-gang air-conditioner |
| CN101038097B (en) * | 2006-03-15 | 2011-02-02 | 海尔集团公司 | Refrigerating system of air-conditioning and method for controlling flow of refrigerant |
| JP5674572B2 (en) * | 2011-07-06 | 2015-02-25 | 三菱電機株式会社 | Air conditioner |
| CN102419041A (en) * | 2011-12-13 | 2012-04-18 | Tcl空调器(中山)有限公司 | Throttle opening degree control method for varied-frequency air-conditioner |
-
2000
- 2000-06-02 CN CN00111066A patent/CN1104605C/en not_active Expired - Fee Related
Cited By (57)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101960232B (en) * | 2008-02-28 | 2012-11-07 | 大金工业株式会社 | Refrigeration device |
| CN101592388B (en) * | 2008-05-27 | 2013-10-30 | 海尔集团公司 | Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor |
| CN101603701B (en) * | 2008-06-13 | 2012-12-19 | Tcl集团股份有限公司 | Auxiliary heating method of air conditioner with auxiliary heating device |
| CN102478296B (en) * | 2010-11-24 | 2014-04-09 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN102478296A (en) * | 2010-11-24 | 2012-05-30 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN102147144A (en) * | 2011-04-07 | 2011-08-10 | 宁波奥克斯电气有限公司 | Control method for preventing overhigh exhaust temperature of direct-current variable-frequency heat pump air conditioner |
| CN102353121A (en) * | 2011-09-13 | 2012-02-15 | Tcl空调器(中山)有限公司 | Control method of refrigerant flow of multi-connected unit |
| CN102353121B (en) * | 2011-09-13 | 2013-08-28 | Tcl空调器(中山)有限公司 | Control method of refrigerant flow of multi-connected unit |
| CN102563789A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Multi-split heat pump air conditioning system and control method thereof |
| CN103542489A (en) * | 2012-07-12 | 2014-01-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method, device and system of air conditioner system |
| CN103542489B (en) * | 2012-07-12 | 2015-12-09 | 珠海格力节能环保制冷技术研究中心有限公司 | The control method of air-conditioning system, Apparatus and system |
| CN103206820A (en) * | 2013-04-27 | 2013-07-17 | 海尔集团公司 | Expansion valve opening controlling method for preventing oscillating of expansion valve |
| CN104180563A (en) * | 2013-05-27 | 2014-12-03 | 珠海格力电器股份有限公司 | Method for returning oil during heating of multi-online system |
| CN105229395B (en) * | 2013-08-08 | 2017-08-25 | 富士通将军股份有限公司 | Conditioner |
| CN105229395A (en) * | 2013-08-08 | 2016-01-06 | 富士通将军股份有限公司 | Conditioner |
| CN104896818A (en) * | 2014-03-04 | 2015-09-09 | 海尔集团公司 | Low-pressure safe refrigerant filling air conditioner |
| CN103982987A (en) * | 2014-05-07 | 2014-08-13 | 广东美的暖通设备有限公司 | Method and system for preventing bias flowing of refrigerant in multi-split air conditioner and multi-split air conditioner |
| CN103982987B (en) * | 2014-05-07 | 2016-08-31 | 广东美的暖通设备有限公司 | Prevent the method and system of coolant bias current, multi-connected air conditioner in multi-connected air conditioner |
| CN105526746A (en) * | 2014-10-21 | 2016-04-27 | 株式会社鹭宫制作所 | Control device and control method of refrigerated storage |
| CN105526746B (en) * | 2014-10-21 | 2018-07-13 | 株式会社鹭宫制作所 | The control device and control method of cold room |
| CN104697121B (en) * | 2015-03-27 | 2017-06-06 | 广东美的暖通设备有限公司 | The control method and multiple on-line system of indoor set in multiple on-line system |
| CN104697121A (en) * | 2015-03-27 | 2015-06-10 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and indoor unit control method thereof |
| CN104748429A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multiple on-line system |
| CN104748427A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Unloading component for multi-split system and multi-split system with same |
| CN105546731A (en) * | 2015-12-23 | 2016-05-04 | 宁波奥克斯电气股份有限公司 | Control method for heating of household central air conditioner in transition season |
| CN105546731B (en) * | 2015-12-23 | 2018-07-03 | 宁波奥克斯电气股份有限公司 | The control method that residential central air- is heated in transition season |
| CN105546753A (en) * | 2016-01-04 | 2016-05-04 | 广东美的暖通设备有限公司 | Air conditioner control method and device and air conditioner |
| CN105546753B (en) * | 2016-01-04 | 2018-03-30 | 广东美的暖通设备有限公司 | Control method, device and the air conditioner of air conditioner |
| CN105823122A (en) * | 2016-01-05 | 2016-08-03 | 青岛海尔空调器有限总公司 | Radiation type wall-mounted air conditioner and control method thereof |
| CN105627434B (en) * | 2016-01-05 | 2019-04-23 | 青岛海尔空调器有限总公司 | A kind of radiant type ground heating air conditioner and its control method |
| CN105823122B (en) * | 2016-01-05 | 2019-04-23 | 青岛海尔空调器有限总公司 | A kind of radiant type wall hanging air conditioner and its control method |
| CN105627434A (en) * | 2016-01-05 | 2016-06-01 | 青岛海尔空调器有限总公司 | Radial floor heating air conditioner and control method |
| CN105737333A (en) * | 2016-02-22 | 2016-07-06 | 广东美的暖通设备有限公司 | Multiple on-line system and mode switching control method thereof |
| CN105737333B (en) * | 2016-02-22 | 2018-09-07 | 广东美的暖通设备有限公司 | Multi-line system and its mode switch control method |
| CN107461877A (en) * | 2017-07-19 | 2017-12-12 | 青岛海尔空调电子有限公司 | A kind of multiple on-line system defrosting control method |
| CN107461877B (en) * | 2017-07-19 | 2020-12-08 | 青岛海尔空调电子有限公司 | Defrosting control method for multi-split system |
| CN107514743A (en) * | 2017-07-27 | 2017-12-26 | 青岛海尔空调器有限总公司 | A kind of air-conditioner control method, control device and air conditioner |
| CN107514743B (en) * | 2017-07-27 | 2021-03-16 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
| CN107559953A (en) * | 2017-08-15 | 2018-01-09 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN107559953B (en) * | 2017-08-15 | 2020-02-04 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and control method and device of supercooling loop valve body thereof |
| CN107917505A (en) * | 2017-11-07 | 2018-04-17 | 珠海格力电器股份有限公司 | A kind of multi-split air conditioner and its outdoor unit defrosting control method |
| CN109028495A (en) * | 2018-09-18 | 2018-12-18 | 青岛海尔空调电子有限公司 | The method, apparatus and computer storage medium of air conditioner coolant flow quantity control |
| CN109028494A (en) * | 2018-09-18 | 2018-12-18 | 青岛海尔空调电子有限公司 | The method, apparatus and computer storage medium of air conditioner coolant flow quantity control |
| CN109028495B (en) * | 2018-09-18 | 2020-09-18 | 青岛海尔空调电子有限公司 | Method and device for controlling flow of air conditioner refrigerant and computer storage medium |
| CN109631236A (en) * | 2018-12-14 | 2019-04-16 | 广东Tcl智能暖通设备有限公司 | Multi-connected air conditioner device and its Defrost method |
| CN110145905A (en) * | 2019-04-25 | 2019-08-20 | 安徽美博智能电器有限公司 | A kind of control method and device of compressor |
| CN111271900A (en) * | 2019-12-10 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Compressor oil return control method and system and air conditioner |
| CN111397239A (en) * | 2020-03-13 | 2020-07-10 | 海信（山东）空调有限公司 | Multi-split air conditioning system and method for reducing noise of multi-split air conditioning system |
| CN111520875A (en) * | 2020-03-24 | 2020-08-11 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioner |
| CN111520875B (en) * | 2020-03-24 | 2022-11-18 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioner |
| CN111895604A (en) * | 2020-07-24 | 2020-11-06 | 海信（山东）空调有限公司 | Air conditioner |
| CN111895604B (en) * | 2020-07-24 | 2021-10-22 | 海信（山东）空调有限公司 | Air conditioner |
| CN113654196A (en) * | 2021-07-15 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method for controlling self-cleaning in indoor heat exchanger |
| CN113531783A (en) * | 2021-07-21 | 2021-10-22 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
| CN113531783B (en) * | 2021-07-21 | 2022-06-28 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
| CN113883681A (en) * | 2021-09-28 | 2022-01-04 | 青岛海尔中央空调有限公司 | Control method for refrigeration system and refrigeration system |
| WO2023098067A1 (en) * | 2021-12-02 | 2023-06-08 | 青岛海尔空调器有限总公司 | Control method and device for pressure relief of air conditioner, and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1104605C (en) | 2003-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1104605C (en) | Improved refrigerating system for one driving multiple-unit air conditioner | |
| CN1175226C (en) | Air conditioner | |
| CN1077268C (en) | Air conditioner | |
| CN1265142C (en) | Multibody air conditioner and its working method | |
| CN1324278C (en) | Cooling cycle apparatus and method of controlling linear expansion valve of the same | |
| CN100338411C (en) | Electricity generating and air conditioning system | |
| CN100344915C (en) | Refrigeration cycle apparatus | |
| CN1107845C (en) | Controller for air conditioner | |
| CN1339087A (en) | Scroll compressor and air conditioner | |
| CN1776330A (en) | Multi-type air conditioner and method to for controlling same | |
| CN1766445A (en) | System and method for detecting the clogged state of a pipe of a multi-unit air conditioner | |
| CN1108491C (en) | Air conditioner | |
| CN1571908A (en) | Refrigerating equipment | |
| CN104566649A (en) | Air conditioner and control method thereof | |
| EP2006615A3 (en) | Multi air-conditioner for simultaneously cooling/heating room air and method for controlling the same | |
| CN1776228A (en) | Compressor oil recovering apparatus and multi-unit air conditioner equiped with the same | |
| CN1737459A (en) | Cogeneration system and method for controlling the same | |
| CN1957211A (en) | Engine heat pump | |
| CN1737461A (en) | Cogeneration system | |
| CN1239870C (en) | Catenated cooling heating system | |
| CN2767733Y (en) | Oil temperature controller for hydraulic pumping station | |
| CN1609536A (en) | Method and apparatus for preventing the accumulation of liquid refrigerant in an air conditioner | |
| CN1896644A (en) | Cogeneration system | |
| CN1086890A (en) | The conditioner that on heat source unit, connects a plurality of indoor units | |
| CN100339666C (en) | Variable loaded heat pump system in multi machines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1070318 Country of ref document: HK |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030402 Termination date: 20120602 |