CN1243930A - Refrigerating system of one-to-more air conditioner - Google Patents
Refrigerating system of one-to-more air conditioner Download PDFInfo
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- CN1243930A CN1243930A CN98110372A CN98110372A CN1243930A CN 1243930 A CN1243930 A CN 1243930A CN 98110372 A CN98110372 A CN 98110372A CN 98110372 A CN98110372 A CN 98110372A CN 1243930 A CN1243930 A CN 1243930A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A refrigerating system for one-for-more air conditioner features that on the basis of existing one-for-two air conditioner, several electronic expansion valves are used to replace the pi-shaped capillary tube and one-way electromagnetic check valve used in original system. A return throttle branch and its return throttle capillary tube are led out between pre-cooling and over-cooling capillary tubes correspondent to indoor and outdoor units. More temp monitoring points are set up at proper positions, so computer can control the open degree of valves according to control parameters to make the working conditions refrigerant at different positions kept matched state for high efficiency and saving energy. Said system has high effect.
Description
The present invention relates to the improvement of air-conditioner, especially a kind of refrigeration system of multi-split air conditioner, it belongs to the air conditioner refrigerating technical field.
In the operating condition of air-conditioner, generally all adopt capillary-compensated to regulate, perhaps adopt capillary to add to join unidirectional electromagnet cut off valve to carry out that throttling regulates.Commercially available a kind of plain edition one drag two air-conditioner has adopted refrigeration system as shown in Figure 1.Mainly by parallel capillary pipe group, 6,7,8,9,10 and four unidirectional electromagnet cut off valve 11,12,13,14 of " Π " type capillary group constitute throttling arrangement in this system.This device is by " Π " type capillary and unidirectional electromagnet cut off valve, and the organic assembling between all unidirectional electromagnet cut off valve is optimized rationally and mated, and to realize single, double machine, heats, the adjusting of the energy consuming ratio of cold four kinds of operating modes.Yet also there is following shortcoming in this device: (1) complex structure, component costs height." Π " type capillary and four unidirectional electromagnet cut off valve of adopting, it is connected and must causes complex structure, and four these valve prices are more expensive, improved equipment cost.(2) the refrigerant flow size can not be regulated and control in the system.When operating condition off-design operating mode, as because variation of ambient temperature causes the operating mode that the compressor air suction temperature is higher, can not in time regulate refrigerant flow, cause operational energy efficiency lower.The heat exchanger frosting takes place sometimes, influences operational effect.(3) regulating working conditions power consumption is big.Need forceful electric power to drive because the unidirectional electromagnetism that adopted cuts valve, its power consumption is 4W/, when making the two-shipper refrigeration, only be used to start unidirectional electromagnet cut off valve will power consumption 16W more than.(4) can't realize that one drags three, one to drag four---one drags many refrigeration systems.
Purpose of the present invention is exactly the shortcoming that will overcome above-mentioned refrigeration system, designs a kind of refrigeration system of multi-split air conditioner.This refrigeration system can in time be regulated refrigerant flow when operation of air conditioner operating mode off-design operating mode, make this flow and this depart from operating mode and be complementary.This refrigeration system will be simplified running route, simplifies parts, and the refrigerant flow of optimizing the off-design operating mode rationally mates, and makes whole system be in best throttling branch stream mode all the time, improves the operational energy efficiency ratio.
Task of the present invention has following technical scheme to realize, developed a kind of refrigeration system of multi-split air conditioner, it comprises: compressor, liquid reservoir, cross valve, device for drying and filtering, muffler, outdoor heat exchanger and corresponding precooling capillary thereof, many indoor heat exchangers and the corresponding cold capillary of mistake thereof, between the cold capillary of mistake of every indoor heat exchanger and correspondence thereof, be provided with corresponding electric expansion valve, between compressor and cross valve, be provided with a compressor air-discharging point for measuring temperature T with certain pulse range
1, be provided with all corresponding refrigeration outlet point for measuring temperature T at all the indoor heat exchanger refrigeration port of export
i(the above natural number of i:5), outside between the cold capillary of all mistakes that all precooling capillaries of machine correspondence are corresponding with interior machine, draw the throttling branch road one time, this bypass line turns in the compressor first wife liquid reservoir successively by returning throttle capillary tube and backflow liquid reservoir thus, it is the compressor suction place, returning between throttle capillary tube and the backflow liquid reservoir of this branch road, be provided with point for measuring temperature T after the throttling
3, air-breathing point for measuring temperature T is set at the compressor suction place
2, by point for measuring temperature T after the throttling on this branch road
3With air-breathing point for measuring temperature T
2Constitute compressor air suction temperature difference T
2-T
3The control parameter; All point for measuring temperature T
1, T
2,---T
iBy the Information Monitoring of thermistor, convert through computer again, send the control parameter of electromagnetic pulse by computer to the supporting coil of corresponding electric expansion valve, thereby control the adjusting that the suitable aperture of corresponding electric expansion valve realizes refrigerant condition.
The refrigeration system of multi-split air conditioner also can be provided with one during only at heating operation, the defrosting judgement point for measuring temperature T that just gathers between described outdoor heat exchanger and the corresponding precooling capillary thereof
4
The refrigeration system of multi-split air conditioner, described time throttling branch road, the air-breathing point for measuring temperature T that its branch road is set
2With point for measuring temperature T after the throttling
3Between duct length at 200-600mm, this two point for measuring temperature T
2With T
3Between pipeline on also connect the back flow of refrigerant pipeline of sending from cross valve arranged.
The refrigeration system of multi-split air conditioner, described time throttle capillary tube, grade ∮ 0.4～0.8mm in it, length is selected in 800～1500mm.
The refrigeration system of multi-split air conditioner, described electric expansion valve, its pulse range is: 0～450 pulse, but this valve in refrigerating operaton the selected reference aperture in 120～250 pulses, but in heating operation the selected reference aperture in 80～210 pulses.
The refrigeration system of multi-split air conditioner, the electromagnetic pulse control parameter of described electric expansion valve is carried out regulating working conditions by following control scheme:
At first according to compressor air suction temperature difference T
2-T
3Regulate: work as T
2-T
3In the time of≤2 ℃, all electric expansion valves keep original benchmark aperture, and promptly the aperture correction amplitude of all this valves is 0; When the air-breathing temperature difference at 2 ℃＜T
2-T
3In the time of≤10 ℃, to the aperture correction amplitude of all this valves of refrigerating operaton be 4～12 pulses/time, to the aperture correction amplitude of all this valves of heating operation be 3～10 pulses/time; As this air-breathing temperature difference T
2-T
3In the time of＞10 ℃, to the aperture correction amplitude of all this valves of refrigerating operaton be 16 pulses/time, to the aperture correction amplitude of all this valves of heating operation be 15 pulses/time;
Next is according to the delivery temperature T of compressor
1Regulate: wherein the prerequisite to the aperture correction of electric expansion valve is: when the aperture correction amplitude of all this valves is 0, again according to as this delivery temperature T
1In the time of≤60 ℃, to the aperture correction amplitude of refrigeration or all this valves of heating operation all be-2 pulses/time; When this delivery temperature at 60 ℃＜T
1In the time of≤96 ℃, or at 60＜T
1In the time of≤85 ℃, to the aperture correction amplitude of refrigeration or all this valves of heating operation all be-2～1 pulse/time; As this delivery temperature T
1In the time of＞96 ℃, to refrigerating operaton, or T
1In the time of＞85 ℃, heating operation, the aperture correction amplitude of all this valves all be 5 pulses/time;
Once more, in multicell, in the refrigerating operaton of heat exchanger, gather the refrigeration outlet point for measuring temperature T of all indoor heat exchangers
iWhenever the difference T of point for measuring temperature in twos of (i:5 above natural number)
I1-T
I2Calculate indoor heat exchanger refrigeration outlet temperature difference T
I1-T
I2, work as T
I1-T
I2=0 o'clock, all electric expansion valves kept former benchmark aperture, and promptly the aperture correction amplitude of this valve is 0; Work as T
I1-T
I2In the time of＞5 ℃, the aperture correction amplitude of pairing this valve of this outlet point for measuring temperature of corresponding higher temperatures be 4 pulses/time, the largest cumulative value of this aperture correction amplitude can reach 24 pulses; Exporting temperature difference T according to this refrigeration
I1-T
I2During this valve correction aperture, also can be simultaneously according to T2-T
3And revise aperture, perhaps simultaneously according to T
1And revise exploitation, and all time aperture correction amplitude can be a superposition;
Also have, in service at the unit indoor heat exchanger, during for the single-unit cold operation, the electric expansion valve of the indoor heat exchanger correspondence of shutdown should be on 5～20 pulse apertures, and the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme; During for the unit heating operation, the electric expansion valve of the indoor parallel operation correspondence of shutdown should keep certain aperture, this certain aperture is 0.3～0.5 times of the former benchmark aperture of this valve, and the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme.
The refrigeration system of multi-split air conditioner, described defrosting is judged, as point for measuring temperature T
4＜-4 ℃ when continuing more than 2 minutes, promptly transmit defrosting information, electric expansion valve is all opened foot defrost; As point for measuring temperature T
4＞15 ℃, defrosting finishes to recover heating operation.
The refrigeration system of multi-split air conditioner, the used thermistor of all points for measuring temperature of described Information Monitoring can be selected the thermistor of the temperature-measuring range-30～105 ℃ of normal temperature type for use, also can select the thermistor of megathermal temperature-measuring range-30～140 ℃ for use.
Its advantage of refrigeration system of the present invention is: (1) since in native system with " Π " type capillary and 4 unidirectional electromagnet cut off valve in the two or more electric expansion valves replacement original systems, make native system in the operating condition that changes, regulate the aperture of electric expansion valve, reach the purpose of regulating flow at random, realized the effect that native system is simple in structure.(2) because the aperture extent and scope of electric expansion valve is by being arranged on point for measuring temperature T different in the native system
1, T
2---T
iTemperature parameter information, through the computer control parameter of back transmission electromagnetic pulse that converts, thereby control the suitable aperture of corresponding electric expansion valve, realize the adjusting of refrigerant condition.(3) regulating working conditions power consumption is little.The stepper motor of electric expansion valve low in energy consumption, it is low to regulate the required electric weight of operating mode, so energy-saving effect is arranged.So native system and all point for measuring temperature T
1, T
2,---T
iThe just outstanding pass of relevant parameter that position and each point for measuring temperature are set is important.T wherein
2, T
3And the place to return being provided with of throttling branch road even more important.The crux place that the present invention distinguishes other air-conditioner refrigerating system is exactly the setting of this branch road and the T on this branch road
2-T
3The control parameter of the compressor air suction temperature difference that constitutes.The main effect of this branch road is that control has the cold cold-producing medium of a certain amount of mistake directly to be back to compressor without heat exchanger (indoor or outdoor), thereby plays the adjusting refrigerant flow, also can play the effect of cooling compressor simultaneously.No matter in refrigerating operaton, still in heating operation, this bypass line and go back to the suction inlet place that refrigerant flow direction in the throttle capillary tube always flows to compressor.This has just determined T
2-T
3Can judge whether the cold-producing medium that flows to compressor suction is suitable for keeping the work condition state of high energy efficiency ratio.Therefore, as follows according to the relevant parameter of each point for measuring temperature to the electronic Expansion Valve Control scheme:
At first according to T
2-T
3Value is regulated the aperture of electric expansion valve, makes from indoor heat exchanger (refrigerating operaton) or from the cold-producing medium that outdoor heat exchanger (heating operation) flows back to and adjusted suction temperature T before sucking compressor
2, make it unlikely too high.Because point for measuring temperature T
2Being subjected to the influence of refrigerant flow all is bigger in the heat operation still at refrigerating operaton.This just causes the cold-producing medium specific volume at compressor air suction mouth place bigger, certainly will cause the compression ratio of compressor bigger, and the operating efficiency of compressor will descend like this.And be arranged on back the adjustment that time throttle capillary tube on the throttling branch road is only fixed refrigerant flow, so be arranged on the point for measuring temperature T behind this capillary-compensated
3Be metastable in native system, it is not subjected to the influence of refrigerant flow substantially.For same air-conditioner, in case make, its various length capillaceous, caliber has also just been determined.The refrigeration of the refrigeration system of this air-conditioner or heating operation just can only lean on the aperture correction of electric expansion valve to regulate.Therefore according to T
2-T
3The air-breathing temperature difference, the aperture of regulating this valve also is based on the fixedly adjustment of considering back on the throttling branch road of returning throttle capillary tube, regulates refrigerant flow by the aperture correction of this valve in the lump, thereby improves the work Energy Efficiency Ratio of native system.Can say so: according to T
2-T
3Adjusting to the electronic expansion valve opening correction is a most important regulating working conditions in the native system.According to T
2-T
3The correction of the electronic expansion valve opening that carries out mainly is to regulate because of refrigerant flow deficiency in the system, and causes the compressor air suction temperature T
2When higher,, open the aperture of big this valve suitably by control parameter rules, amplitude range 0～16 pulse/time, to increase refrigerant flow, keep T
2In a suitable scope, general T
2Can remain between-5～30 ℃.What also have worth proposition is: native system is provided with two liquid reservoirs (gas-liquid separator) and also is based on the setting of considering back the throttling branch road in the compressor air suction loop; may cause undue liquid refrigerant backflow phenomenon to take place; and liquid reservoirs more than being provided with; too much liquid refrigerant and gaseous refrigerant are separated; what guarantee the compressor suction is a large amount of gas; rather than liquid, thereby protection compressor.Simultaneously, in the unnecessary liquid refrigeration developing agent storage liquid reservoir, can the minimizing system in the circular flow amount of cold-producing medium, also just make T
2Unlikely too low.
Secondly, at foundation compressor exhaust temperature T
1In regulating, it also is at T
2-T
3In the time of≤2 ℃, be under 0 the prerequisite, just to carry out the aperture correction amplitude of electric expansion valve according to compressor exhaust temperature T
1Aperture to electric expansion valve is revised.Work as T
1Cross (T when hanging down
1≤ 60 ℃) may cause compressor to suck liquid, and cause liquid compression, this shows that the refrigerating capacity flow is excessive in the native system, should reduce the aperture of this valve, be that its aperture correction amplitude is negative value (2 pulses/time), on former benchmark opening value basis, turn down 2 pulses.Work as T
1When too high, (T
1＞96 ℃, to refrigerating operaton) or (T
1＞85 ℃, to heating operation), show refrigerant flow deficiency in the native system, should control this valve and open big aperture, promptly its aperture correction amplitude be 5 pulses/time, in order to the delivery temperature T that guarantees compressor
1Optimum temperature range: refrigerating operaton is 83-88 ℃; Heating operation is 70-80 ℃.Measure T
1Temperature also has another effect: the protection compression.Work as T
1In the time of＞103 ℃, control press frequency no longer rises; Work as T
1In the time of＞111 ℃, then control press and reduce the frequency operation; Work as T
1In the time of＞120 ℃, then cut off the electricity supply compressor shutdown.
Once more, in order further to strengthen the control of multimachine refrigerating operaton, gathering the refrigeration outlet point for measuring temperature T of all indoor heat exchangers
iWhenever the difference T of point for measuring temperature in twos of (i:5 above natural number)
I1-T
I2Draw indoor heat exchanger refrigeration outlet temperature difference T
I1-T
I2This temperature difference T
I1-T
I2Only in the multimachine refrigerating operaton, just help out.It has reflected cold-producing medium evaporation situation in indoor heat exchanger.Under normal situation, the refrigerant flow in all indoor heat exchangers is answered reasonable distribution, can record: T
I1=T
I2As some refrigeration outlet point for measuring temperature T wherein
iWhen temperature is higher, show that refrigerant flow is less in its corresponding indoor heat exchanger, correspondingly electric expansion valve then should strengthen aperture correction amplitude, and refrigerant flow is strengthened, and reduces this point for measuring temperature T
iTemperature, be tending towards all point for measuring temperature T to reach
I (1,2,3---)Uniform temp.Exporting temperature difference T according to refrigeration
I1-T
I2When revising the aperture amplitude of electric expansion valve, also can be simultaneously according to T
2-T
3And revise aperture, perhaps simultaneously according to T
1And revise aperture.Revising aperture for these three kinds can superposition, and is with T
2-T
3For prerequisite is revised aperture earlier.
Also have, under the operating condition of unit indoor heat exchanger, during for the single-unit cold operation, the electric expansion valve of the indoor heat exchanger correspondence of shutdown should be on the 5-20 pulse aperture, and the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme.During for the unit heating operation, the electric expansion valve of the indoor heat exchanger correspondence of shutdown should keep certain aperture, and the part cold-producing medium is passed through.This certain aperture should be this shutdown the indoor heat exchanger correspondence the former benchmark aperture of electric expansion valve 0.3-0.5 doubly, the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme.
Native system also in heating operation, is provided with defrosting and judges point for measuring temperature T
4Because the aperture of electric expansion valve is adjustable, is reaching defrosting Rule of judgment: T
4In the time of＜4 ℃, but this valve of standard-sized sheet makes enough cold-producing mediums wash away all heat exchangers, and frosting is removed rapidly and totally.
Embodiments of the invention further specify as follows in conjunction with the accompanying drawings:
Fig. 1 is the refrigeration system flow chart of plain edition one drag two air-conditioner.
Fig. 2 is the refrigeration system flow chart of modified one drag two air-conditioner.
Fig. 3 drags the refrigeration system flow chart of three air-conditioners for modified one.
Make one drag two air-conditioner KFR-25GW/BP * 2 and one and drag three air-conditioner KFR-20GW/BP * 3, its flow chart is referring to Fig. 2, and 3, it comprises: compressor 1, liquid reservoir 2, cross valve 3, off-premises station heat exchanger 4, and corresponding precooling capillary 15,16, device for drying and filtering 5, muffler 21, indoor heat exchanger 18,17,28 and the corresponding cold capillary 19 of mistake, 20,27 these common parts; Also (17-20,18-19 are provided with the corresponding electric expansion valve with certain pulse range 24,23,26 between 28-27) at every indoor heat exchanger and the corresponding cold capillary of mistake thereof.Between compressor 1 and cross valve 3, be provided with a compressor air-discharging point for measuring temperature T
1The refrigeration port of export at all indoor heat exchanger 18,17,28 is provided with all corresponding refrigeration outlet point for measuring temperature T
5, T
6, T
7The cold capillary 19,20 of all mistakes that the precooling capillary 15,16 of machine correspondence is corresponding with interior machine outside between 27, is drawn the throttling branch road one time.This bypass line is passed through back throttle capillary tube 25 and backflow liquid reservoir 22 thus, turn on successively in first wife's liquid reservoir 2 of compressor 1, be the suction inlet place of compressor 1,, be provided with point for measuring temperature T after the throttling returning between throttle capillary tube 25 and the backflow liquid reservoir 22 of this branch road
3, 1 suction inlet place is provided with air-breathing point for measuring temperature T at compressor
2, by point for measuring temperature T after the throttling on this branch road
3With air-breathing point for measuring temperature T
2Constitute compressor air suction temperature difference T
2-T
3The control parameter.All point for measuring temperature T
1, T
2,---T
7By the thermistor Information Monitoring.This information converts through computer again, sends the control parameter of electromagnetic pulse by computer to the supporting coil of corresponding electric expansion valve (23,24,26), thereby controls the adjusting that the suitable aperture of corresponding electric expansion valve realizes cooling condition.Be provided with one between outdoor heat exchanger 4 and the corresponding precooling capillary 15,16 thereof again during, the defrosting judgement point for measuring temperature T that just gathers only at heating operation
4The air-breathing point for measuring temperature T that on the pipeline that returns the throttling branch road, is provided with
2With point for measuring temperature T after the throttling
3Between duct length be chosen for 500mm with regard to native system.This two point for measuring temperature T
2With T
3Between pipeline on also connect the refrigeration reflux line of sending from cross valve 3 arranged.Set time throttle capillary tube 15, its internal diameter is elected Φ 0.5mm as, and length is 1000mm, or 900mm.Set electric expansion valve 23,24,26, its model is: LAM-B20 YHCF-10.This valve selected reference aperture in refrigerating operaton is 150 pulses; The selected reference aperture is 100 pulses in heating operation.During the air-conditioner operation, at first electronic expansion is determined a certain benchmark aperture of electric expansion valve, then according to above-mentioned all point for measuring temperature T according to the method for operation
1, T
2---T
7, the information of collection is revised the aperture of all electric expansion valves by the control scheme through computer, so that whole system is in the optimum Match state all the time.When refrigeration system of the present invention is used for multi-split air conditioner (two above indoor heat exchangers), as long as according to required refrigerating capacity, regulate the benchmark aperture and the corresponding correction amplitude of electric expansion valve, choosing increases the number of this valve, sets up corresponding refrigeration outlet point for measuring temperature T
iCan realize that whole system is in the optimum Match state.
Claims (8)
1, a kind of refrigeration system of multi-split air conditioner, it comprises: compressor, liquid reservoir, cross valve, device for drying and filtering, muffler, outdoor heat exchanger and corresponding precooling capillary thereof, many indoor heat exchangers and the corresponding cold capillary of mistake thereof is characterized in that: be provided with the corresponding electric expansion valve with certain pulse range between the cold capillary of mistake of every indoor heat exchanger and correspondence thereof, be provided with a compressor air-discharging point for measuring temperature T between compressor and cross valve
1, be provided with all corresponding refrigeration outlet point for measuring temperature T at all the indoor heat exchanger refrigeration port of export
i(the above natural number of i:5), outside between the cold capillary of all mistakes that all precooling capillaries of machine correspondence are corresponding with interior machine, draw the throttling branch road one time, this bypass line turns in the compressor first wife liquid reservoir successively by returning throttle capillary tube and backflow liquid reservoir thus, it is the compressor suction place, returning between throttle capillary tube and the backflow liquid reservoir of this branch road, be provided with point for measuring temperature T after the throttling
3, air-breathing point for measuring temperature T is set at the compressor suction place
2, by point for measuring temperature T after the throttling on this branch road
3With air-breathing point for measuring temperature T
2Constitute compressor air suction temperature difference T
2-T
3The control parameter; All point for measuring temperature T
1, T
2,---T
iBy the Information Monitoring of thermistor, convert through computer again, send the control parameter of electromagnetic pulse by computer to the supporting coil of corresponding electric expansion valve, thereby control the adjusting that the suitable aperture of corresponding electric expansion valve realizes refrigerant condition.
2, according to the refrigeration system of the described multi-split air conditioner of claim 1, it is characterized in that: also can be provided with one between described outdoor heat exchanger and the corresponding precooling capillary thereof during, the defrosting judgement point for measuring temperature T that just gathers only at heating operation
4
3, according to the refrigeration system of the described multi-split air conditioner of claim 1, it is characterized in that: described time throttling branch road, the air-breathing point for measuring temperature T that its branch road is set
2With point for measuring temperature T after the throttling
3Between duct length at 200-600mm, this two point for measuring temperature T
2With T
3Between pipeline on also connect the back flow of refrigerant pipeline of sending from cross valve arranged.
4, according to the refrigeration system of the described multi-split air conditioner of claim 1, it is characterized in that: described time throttle capillary tube, grade ∮ 0.4～0.8mm in it, length is selected in 800～1500mm.
5, according to the refrigeration system of the described multi-split air conditioner of claim 1, it is characterized in that: described electric expansion valve, its pulse range is: 0～450 pulse, but this valve in refrigerating operaton the selected reference aperture in 120～250 pulses, but in heating operation the selected reference aperture in 80～210 pulses.
6, according to the refrigeration system of the described multi-split air conditioner of claim 1, it is characterized in that: the electromagnetic pulse control parameter of described electric expansion valve is carried out regulating working conditions by following control scheme:
At first according to compressor air suction temperature difference T
2-T
3Regulate: work as T
2-T
3In the time of≤2 ℃, all electric expansion valves keep original benchmark aperture, and promptly the aperture correction amplitude of all this valves is 0; When the air-breathing temperature difference at 2 ℃＜T
2-T
3In the time of≤10 ℃, to the aperture correction amplitude of all this valves of refrigerating operaton be 4～12 pulses/time, to the aperture correction amplitude of all this valves of heating operation be 3～10 pulses/time; As this air-breathing temperature difference T
2-T
3In the time of＞10 ℃, to the aperture correction amplitude of all this valves of refrigerating operaton be 16 pulses/time, to the aperture correction amplitude of all this valves of heating operation be 15 pulses/time;
Next is according to the delivery temperature T of compressor
1Regulate: wherein the prerequisite to the aperture correction of electric expansion valve is: when the aperture correction amplitude of all this valves is 0, again according to as this delivery temperature T
1In the time of≤60 ℃, to the aperture correction amplitude of refrigeration or all this valves of heating operation all be-2 pulses/time; When this delivery temperature at 60 ℃＜T
1In the time of≤96 ℃, or at 60＜T
1In the time of≤85 ℃, to the aperture correction amplitude of refrigeration or all this valves of heating operation all be-2～1 pulse/time; As this delivery temperature T
1In the time of＞96 ℃, to refrigerating operaton, or T
1In the time of＞85 ℃, heating operation, the aperture correction amplitude of all this valves all be 5 pulses/time;
Once more, in multicell, in the refrigerating operaton of heat exchanger, gather the refrigeration outlet point for measuring temperature T of all indoor heat exchangers
iWhenever the difference T of point for measuring temperature in twos of (i:5 above natural number)
I1-T
I2Calculate indoor heat exchanger refrigeration outlet temperature difference T
I1-T
I2, work as T
I1-T
I2=0 o'clock, all electric expansion valves kept former benchmark aperture, and promptly the aperture correction amplitude of this valve is 0; Work as T
I1-T
I2In the time of＞5 ℃, the aperture correction amplitude of pairing this valve of this outlet point for measuring temperature of corresponding higher temperatures be 4 pulses/time, the largest cumulative value of this aperture correction amplitude can reach 24 pulses; Exporting temperature difference T according to this refrigeration
I1-T
I2During this valve correction aperture, also can be simultaneously according to T2-T
3And revise aperture, perhaps simultaneously according to T
1And revise aperture, and all time aperture correction amplitude can be a superposition;
Also have, in service at the unit indoor heat exchanger, during for the single-unit cold operation, the electric expansion valve of the indoor heat exchanger correspondence of shutdown should be on 5～20 pulse apertures, and the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme; During for the unit heating operation, the electric expansion valve of the indoor parallel operation correspondence of shutdown should keep certain aperture, this certain aperture is 0.3～0.5 times of the former benchmark aperture of this valve, and the electric expansion valve of the indoor heat exchanger correspondence of start is then controlled the aperture correction amplitude of this valve by above-mentioned control parameter scheme.
7, according to the refrigeration system of the described multi-split air conditioner of claim 2, it is characterized in that: described defrosting is judged, as point for measuring temperature T
4＜-4 ℃ when continuing more than 2 minutes, promptly transmit defrosting information, electric expansion valve is all opened foot defrost; As point for measuring temperature T
4＞15 ℃, defrosting finishes to recover heating operation.
8, according to the refrigeration system of claim 1 or 2 or 3 or 6 or 7 described multi-split air conditioners, it is characterized in that: the used thermistor of all points for measuring temperature of described Information Monitoring can be selected the thermistor of the temperature-measuring range-30～105 ℃ of normal temperature type for use, also can select the thermistor of megathermal temperature-measuring range-30～140 ℃ for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98110372A CN1109221C (en) | 1998-07-31 | 1998-07-31 | Refrigerating system of one-to-more air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98110372A CN1109221C (en) | 1998-07-31 | 1998-07-31 | Refrigerating system of one-to-more air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1243930A true CN1243930A (en) | 2000-02-09 |
| CN1109221C CN1109221C (en) | 2003-05-21 |
Family
ID=5220423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98110372A Expired - Fee Related CN1109221C (en) | 1998-07-31 | 1998-07-31 | Refrigerating system of one-to-more air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1109221C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324278C (en) * | 2004-04-12 | 2007-07-04 | Lg电子株式会社 | Cooling cycle apparatus and method of controlling linear expansion valve of the same |
| CN102252475A (en) * | 2011-05-06 | 2011-11-23 | 宁波奥克斯电气有限公司 | Method for adjusting electronic expansion valve of turned-off indoor unit during heating of VRV (Varied Refrigerant Volume) air-conditioning system |
| CN101989077B (en) * | 2009-07-31 | 2012-06-06 | 珠海格力电器股份有限公司 | Electronic expansion valve driving system and driving method thereof |
| CN104154629A (en) * | 2014-05-26 | 2014-11-19 | 广东美的制冷设备有限公司 | Method and device for controlling flow of refrigerant of air conditioner system with an outdoor unit and multiple indoor units |
| CN105003975A (en) * | 2015-09-02 | 2015-10-28 | 广东美的制冷设备有限公司 | Split floor type air conditioner |
| CN105716164A (en) * | 2016-03-25 | 2016-06-29 | 青岛海尔空调电子有限公司 | Water-cooled multi-split unit system |
| CN106574814A (en) * | 2014-10-20 | 2017-04-19 | 三菱电机株式会社 | Air conditioner muffler and air conditioner equipped with muffler |
| CN108759008A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning with it of air-conditioning |
| CN109494428A (en) * | 2018-11-08 | 2019-03-19 | 安徽江淮汽车集团股份有限公司 | A kind of batteries of electric automobile cooling system |
| CN111006374A (en) * | 2019-12-16 | 2020-04-14 | 广东美的暖通设备有限公司 | Control method and device of air conditioner, air conditioner and computer readable storage medium |
| CN111486553A (en) * | 2020-03-25 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner control method and device, air conditioner and computer storage medium |
| CN112460785A (en) * | 2020-10-26 | 2021-03-09 | 珠海格力电器股份有限公司 | Air conditioner pipeline noise elimination method and system and air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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1998
- 1998-07-31 CN CN98110372A patent/CN1109221C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324278C (en) * | 2004-04-12 | 2007-07-04 | Lg电子株式会社 | Cooling cycle apparatus and method of controlling linear expansion valve of the same |
| CN101989077B (en) * | 2009-07-31 | 2012-06-06 | 珠海格力电器股份有限公司 | Electronic expansion valve driving system and driving method thereof |
| CN102252475A (en) * | 2011-05-06 | 2011-11-23 | 宁波奥克斯电气有限公司 | Method for adjusting electronic expansion valve of turned-off indoor unit during heating of VRV (Varied Refrigerant Volume) air-conditioning system |
| CN102252475B (en) * | 2011-05-06 | 2012-10-10 | 宁波奥克斯电气有限公司 | Method for adjusting electronic expansion valve of turned-off indoor unit during heating of VRV (Varied Refrigerant Volume) air-conditioning system |
| CN104154629A (en) * | 2014-05-26 | 2014-11-19 | 广东美的制冷设备有限公司 | Method and device for controlling flow of refrigerant of air conditioner system with an outdoor unit and multiple indoor units |
| CN106574814A (en) * | 2014-10-20 | 2017-04-19 | 三菱电机株式会社 | Air conditioner muffler and air conditioner equipped with muffler |
| CN105003975B (en) * | 2015-09-02 | 2018-03-27 | 广东美的制冷设备有限公司 | Split-floor type air conditioner |
| CN105003975A (en) * | 2015-09-02 | 2015-10-28 | 广东美的制冷设备有限公司 | Split floor type air conditioner |
| CN105716164A (en) * | 2016-03-25 | 2016-06-29 | 青岛海尔空调电子有限公司 | Water-cooled multi-split unit system |
| CN105716164B (en) * | 2016-03-25 | 2019-05-24 | 青岛海尔空调电子有限公司 | A kind of water-cooled multi-connected machine system |
| CN108759008A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning with it of air-conditioning |
| CN108759008B (en) * | 2018-06-12 | 2020-09-04 | 广东美的暖通设备有限公司 | Control method and device of air conditioner and air conditioner with control device |
| US11333379B2 (en) | 2018-06-12 | 2022-05-17 | Hefei Midea Heating & Ventilating Equipment Co., Ltd. | Air conditioner controlling method and apparatus and air conditioner having the same |
| CN109494428A (en) * | 2018-11-08 | 2019-03-19 | 安徽江淮汽车集团股份有限公司 | A kind of batteries of electric automobile cooling system |
| CN109494428B (en) * | 2018-11-08 | 2021-06-01 | 安徽江淮汽车集团股份有限公司 | Battery cooling system of electric automobile |
| CN111006374A (en) * | 2019-12-16 | 2020-04-14 | 广东美的暖通设备有限公司 | Control method and device of air conditioner, air conditioner and computer readable storage medium |
| CN111486553A (en) * | 2020-03-25 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner control method and device, air conditioner and computer storage medium |
| CN112460785A (en) * | 2020-10-26 | 2021-03-09 | 珠海格力电器股份有限公司 | Air conditioner pipeline noise elimination method and system and air conditioner |
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| Publication number | Publication date |
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| CN1109221C (en) | 2003-05-21 |
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