CN1122156C - Method for controlling electric control expansion valve of composite air conditioner - Google Patents
Method for controlling electric control expansion valve of composite air conditioner Download PDFInfo
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- CN1122156C CN1122156C CN00100835A CN00100835A CN1122156C CN 1122156 C CN1122156 C CN 1122156C CN 00100835 A CN00100835 A CN 00100835A CN 00100835 A CN00100835 A CN 00100835A CN 1122156 C CN1122156 C CN 1122156C
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims description 66
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 9
- 238000005057 refrigeration Methods 0.000 description 58
- 239000007788 liquid Substances 0.000 description 19
- 238000004378 air conditioning Methods 0.000 description 15
- 238000009833 condensation Methods 0.000 description 12
- 230000005494 condensation Effects 0.000 description 12
- 230000008016 vaporization Effects 0.000 description 10
- 238000009834 vaporization Methods 0.000 description 9
- 230000001154 acute effect Effects 0.000 description 6
- 238000007710 freezing Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 230000006837 decompression Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 235000019628 coolness Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A method for controlling electric control expansion valve of composite air conditioner adapts an outdoor unit connecting with the number of indoor units. The method of the invention includes the following steps: adjusting the degree of opening of the expansion valve of the indoor unit in accordance with the number of indoor units in operation; determining whether the number of the indoor units in operation changes changes; and adjusting the degree of opening of the expansion vale of the indoor units in operation in accordance with the change of the number of indoor units. Accordingly, the method is provided to stabilize a cooling cycle in a shortest time by controlling the degree of opening of the expansion valve to be optimum when the number of indoor units in operation changes.
Description
Technical field
The present invention relates to the cold air-conditioning of a kind of non-frequency type list, connect many indoor sets, can freeze to room between many simultaneously with an off-premises station; Relate in particular to a kind of control method of electric control expansion valve of composite air conditioner, it is regulated the opening degree of electric control expansion valve, thereby realizes best kind of refrigeration cycle according to the quantity of operating indoor set.
Background technology
Usually, air-conditioning is different according to its function and configuration, can be divided into polytype.For example, be divided into single cold type, single cold and dehumidification type, cold-warm type by function; Be divided into two types of monolithic devices and separation types by configuration.The monolithic devices air-conditioning is installed on the door and window, and its refrigeration and thermal component are combined as a whole; And that the refrigerating plant of separation type air-conditioning is arranged at is indoor, and heat abstractor/compressor then is arranged at outdoor.The separation type air-conditioning also comprises a kind of compound, has an off-premises station and many indoor sets, can be simultaneously to a plurality of rooms refrigeration.
Can being example to the composite air conditioner of three rooms refrigeration, traditional composite air conditioner comprises and is arranged at three indoor indoor sets 10,11,12 respectively and is arranged at outdoor off-premises station 20.
Off-premises station 20 comprises compressor 30, outdoor heat converter 40, outdoor blowers 41, when being used for a certain room refrigeration, the refrigerant bypass of the scheduled volume that will from outdoor heat converter 40, discharge, thereby regulate the by-passing valve 50 and first capillary 51 of the refrigerant flow of operating indoor set, be used to open or close refrigerant flow, so that according to each indoor set 10,11, the chamber A that 12 running status (ON/OFF) selects its beginning state to freeze, B, the magnetic valve 60 of C, 61,62, respectively with each indoor set 10,11,12 link to each other, so that will change low pressure into by the room temperature of gained and the liquid cryogen under the high pressure after outdoor heat converter 40 coolings and the condensation, the chamber A of the refrigerant of the easy vaporization of low temperature, B, the capillary 70 of C, 71,72, when being used for the operation of air conditioner when a certain room, refrigerant is emitted and imports chamber A from outdoor heat converter 40, B, the capillary 70 of C, 71,72, thereby regulate operating indoor set refrigerant flow main solenoid valve 80 and be used for when second, during the operation of the indoor set of the 3rd Room, reduce main capillary 81 through the pressure for vaporization of the liquid cryogen of the room temperature of outdoor heat converter 40 coolings and condensation and high pressure. Indoor set 10,11,12 is furnished with indoor heat converter 90,91,92 and indoor blower 100,101,102 respectively.
The air-conditioning that constitutes by said structure, when outdoor heat converter 40 is discharged and imported to the steam state refrigerant of high temperature, high pressure from the compressor 30 of off-premises station 20, outdoor heat converter 40 carries out heat exchange with the steam state refrigerant of this high temperature, high pressure, and utilize outdoor blowers 41 air blast, thereby carry out strong cooling and condensation.
Referring to Fig. 2, as a certain room refrigeration, then a certain amount of refrigerant of discharging is opened and allowed to by-passing valve 50 and main solenoid valve 80 from heat exchanger 40, through by-passing valve 50 bypasses, by the liquid cryogen of room temperature that obtains after outdoor heat converter 40 condensations and the high pressure main solenoid valve 80 of flowing through again.
Referring to Fig. 2, the liquid cryogen that flows through the room temperature of main solenoid valve 80 and high pressure flows into the capillary 70,71 or 72 of corresponding chamber A, B or C through one of the magnetic valve 60,61 of chamber A, B or C or 62, obtain the refrigerant of the easy vaporization of low pressure and low temperature, be imported into the indoor heat converter 90,91 or 92 of corresponding chamber A, B or C then.
Low-temp low-pressure refrigerant after capillary 70,71,72 step-downs of chamber A, B, C is vaporized and changes into gas. Indoor heat converter 90,91,92 utilizes indoor blower 100,101,102 air blast, the room air around the cooling.Thereby this air of being lowered the temperature is discharged the into indoor process of refrigerastion of finishing a room (one of chamber A, B, C).The low temperature, the low-pressure refrigerant that are cooled at indoor heat converter 90,91,92 places of chamber A, B, C flow into compressor 30 once more, obtain HTHP steam state refrigerant by adiabatic compression, repeat above-mentioned institute then in steps, finish circularly cooling.
In addition, referring to Fig. 2, when two rooms or three rooms freeze simultaneously, then by-passing valve 50 and main solenoid valve 80 are closed, allow room temperature high-pressure liquid cryogen flow through outdoor heat converter 40 condensations through main capillary 81, and flow into the capillary 70,71,72 of chamber A, B, C, thereby finish the refrigeration of two rooms (chamber A+B, chamber B+C, chamber A+C) or three rooms (chamber A+B+C) through the magnetic valve 60,61,62 of two or three chambers.
In the control method of above-mentioned electric control expansion valve, when operating two rooms or three rooms stop to freeze simultaneously, close its corresponding solenoid valve to stop flowing of refrigerant, this moment, resistance capillaceous increased at once, caused operating indoor cryogen flow quantity not sufficient; Promptly increase because of off-premises station pressure, the temperature of the gas that is discharged acutely increases, compressor out of service (when the temperature of the gas that is discharged surpasses a set value, not impaired for protecting its parts, compressor shutdown.)。If the magnetic valve of indoor set out of service does not cut out, refrigerant is in inflow in the indoor heat converter of stopped status and freezes.
In addition, when carrying out two rooms refrigeration, the resistance in the capillary acutely reduces, and refrigerant flows into compressor, thereby has reduced the reliability of compressor.
Especially, be respectively arranged with the by-passing valve 50, main solenoid valve 80 and the capillary 81 that are used for according to the quantity control refrigerant flow of operating indoor set in traditional composite air conditioner, make the structure of air-conditioning complicated more.
Summary of the invention
The objective of the invention is to: the defective that overcomes above-mentioned conventional art, a kind of control method of electric control expansion valve of composite air conditioner is provided, so that when the indoor set quantity of operation changes, the opening degree of control electric control expansion valve, thereby the circulation of in the shortest time, stablizing refrigerant.
Another object of the present invention is to: a kind of control method of electric control expansion valve of composite air conditioner that additional other parts carry out the circulation of simple refrigerant that need not is provided, with opening degree, thereby control the refrigerant flow of operating indoor set according to the quantity regulating electric control expansion valve of operating indoor set.
For achieving the above object, of the present invention being applicable to may further comprise the steps link to each other with many indoor sets control method of the electric control expansion valve that is used for composite air conditioner that room between many is freezed of an off-premises station:
According to the quantity of operating indoor set, regulate the opening degree of electric control expansion valve, flow into the flow of the refrigerant of operating indoor set with control;
The quantity of judging operating indoor set has no change; And
According to the quantity of the operating indoor set of being judged in the preceding step, regulate the opening degree of electric control expansion valve.
Description of drawings
Fig. 1 is the refrigerant cycle flow chart of traditional composite air conditioner that has three indoor sets;
Fig. 2 is in traditional composite air conditioner that has three indoor sets, and according to the quantity of indoor set in service, magnetic valve is opened state diagram;
Fig. 3 is the refrigerant cycle flow chart that has the composite air conditioner of three indoor sets of the present invention;
Fig. 4 is the circuit block diagram of composite air conditioner low temperature control device of the present invention;
Fig. 5 is the embodiment of the present invention when room refrigeration, according to the variation of the quantity of its operating indoor set, controls the flow chart of electric control expansion valve open degree according to the order of sequence;
Fig. 6 is the present invention another embodiment when two rooms refrigeration, according to the variation of the quantity of its operating indoor set, controls the flow chart of electric control expansion valve open degree according to the order of sequence;
Fig. 7 is the 3rd embodiment when three rooms freezes of the present invention, according to the variation of the quantity of its operating indoor set, controls the flow chart of electric control expansion valve open degree according to the order of sequence;
Fig. 8 is the variation of the present invention according to the quantity of operating indoor set, the variation chart of the opening degree of electric control expansion valve.
The specific embodiment
The present invention is described in detail to contrast respective drawings below in conjunction with embodiment.
Fig. 3 is the refrigerant cycle flow chart that has the composite air conditioner of three indoor sets of the present invention; Wherein identical with conventional composite type air-conditioning parts use identical label.
Referring to Fig. 3, this composite air conditioner has 10,11,12 and off-premises stations 20 of three indoor sets.Off-premises station 20 comprises that one is arranged at the compressor 30 that is used for refrigerant is compressed into HTHP steam state refrigerant in it, be used for steam state HTHP refrigerant liquid is changed into the outdoor heat converter 40 of room temperature high-pressure liquid refrigerant, be used for the suction chamber outer air and it is blowed to the outdoor blowers 41 that outdoor heat converter and room air carry out heat exchange, first by-passing valve 110 and first capillary 111 that are used for a certain amount of refrigerant of discharging from compressor 30 of bypass, second by-passing valve 120 and second capillary 121 that are used for a certain amount of refrigerant of discharging from outdoor heat converter 40 of bypass, be used for running status (ON/OFF) and open or close the refrigerant that sucks to distribute selectively, and will carry out the chamber A that step-down forms low-temp low-pressure frost shape refrigerant at the room temperature high-pressure liquid refrigerant that the cooling of outdoor heat converter 40 places and condensation obtain according to each indoor set, B, the electric control expansion valve of C.
The electric control expansion valve of chamber A, B, C is promptly opened it by the control signal of control device by Electric Machine Control, when control signal is closed, keeps its certain opening degree.
In addition, indoor set 10,11,12 comprise be used for will flow through the low-temp low-pressure frost shape refrigerant of electric control expansion valve of chamber A, B, C be transformed into the indoor heat converter 90,91,92 of steam state refrigerant of low-temp low-pressure and the room air that is used to circulate so that carry out the indoor blower 100,101,102 of heat exchange at indoor heat converter 90,91,92.
Fig. 4 is the circuit block diagram of composite air conditioner low temperature control device of the present invention;
Referring to Fig. 4, supply unit 150 changes common commercial ac voltage into the DC voltage and the output of certain value.Operating control device 152 comprises one group of operated key with the input method of operation (refrigeration, defrosting, air blast etc. automatically), setting air quantity, design temperature and indoor set 10,11,12 running statuses.
Control device 154 is set the electric control expansion valve 130,131,132 of chamber A, B, C to certain opening degree, to flow into the flow of the refrigerant of operating indoor set according to the quantity control of operating indoor set, simultaneously, change its position (by experiment and best opening degree) so that in the shortest time, reach best kind of refrigeration cycle.
Room temperature detector 156 is measured the temperature T R of the room air that flows into indoor set 10,11,12.Compressor drive apparatus 158 is according to the comparative result opening and closing compressor 30 of design temperature TS and indoor temperature TR.
Outdoor blowers drive unit 160 opens or cuts out outdoor blowers 61 according to the comparative result of TS and TR.Indoor blower drive unit 162 opens or cuts out indoor blower 100,101,102 and according to the motor speed of the air quantity that sets by the control indoor blower, blows at indoor heat converter 90,91,92 and carry out heat-exchanged air (cold air).
In addition, valve actuator 164 is subjected to be controlled by the control signal of control device 154 outputs, open or close first, second by-passing valve 110,120 and electric control expansion valve opened to certain open degree or with it and close, so that it flows according to the flow of quantity (i.e. room number in the refrigeration) the control refrigerant of operating indoor set or start/stop.
Below introduce the control procedure and the effect of the electric control expansion valve of composite air conditioner of the present invention.
At first, in Fig. 5, when having described room refrigeration, according to the control method of the opening degree of the number change control electric control expansion valve of operating indoor set.
When air-conditioning was connected power supply, supply unit 150 was transformed into a set DC voltage with the alternating voltage that ac power input end (not mark) provides, and exports to drive circuit and control device 154 respectively.
In step S1, control device 154 starts air-conditioning by the DC voltage by supply unit 150 outputs.
Simultaneously, the user sets quantity (for example: a room freezes), the design temperature TS in the room that freezes and sets air quantity by the operating key on the operating control device 152, and moves selection signal and operation enabling signal (hereinafter to be referred as run signal) by operating control device 152 to control device 154 outputs one.
Then, carry out step S2, control device 154 judges whether to begin the refrigeration in a room, promptly whether has imported run signal.If do not import run signal (when being not), air-conditioning is in holding state, and all steps before the repeating step S2.
According to the result of determination of step S2, if imported run signal (being when being), then execution in step S3.Control device 154 judges whether to be a room refrigeration.If not to a room refrigeration (when being not), the then all steps before the repeating step S3.
If room refrigeration (being when being), then an execution in step S4.Control device 154 output one controls signal to indoor blower drive unit 162 and valve actuator 164, with in one in the indoor blower 100,101,102 that drives operating indoor set (chamber A, B, C) and the electric control expansion valve 130,131,132 corresponding one.
Referring to Fig. 8, indoor blower drive unit 162 starts one of indoor set (one of chamber A, B, C) according to the air quantity that sets by the rotating speed of controlling indoor blower.Valve actuator 164 is arranged at set open degree according to the control signal of control device 154 with one of electric control expansion valve 130,131,132 of chamber A, B, C: 250 grades, and to adapt to the refrigeration demand in a room.
Follow execution in step S5, control device 154 judges whether TS is lower than TR.According to the result of determination of step S5, if TR is not less than TS (when being not), then repeated execution of steps S5; If TS is lower than TR (being when being), then execution in step S6.Control device 154 starts compressor 30 and outdoor blowers 41 by control compressor drive apparatus 158 and outdoor motor drive unit 160.
When compressor and outdoor blowers 41 started, HTHP steam state refrigerant was discharged from the compressor 30 of off-premises station 20, and in step S7 in the flood chamber outer heat-exchanger 40.The steam state refrigerant of this HTHP carries out heat exchange at outdoor heat converter 40 places with the air that blows out by outdoor blowers, thereby is cooled off and condensation.
Be injected into 250 grades one of electric control expansion valve A, B, the C (electric control expansion valve of other off-duty indoor set is closed) of being arranged on of chamber A, B, C at the liquid cryogen of the room temperature high pressure of outdoor heat converter 40 places condensation gained, and the refrigerant of the easy vaporization of decompression formation low-temp low-pressure, flow into one of indoor heat converter 90,91,92 of chamber A, B, C then.
The white shape of the low-temp low-pressure of electric control expansion valve 130,131,132 step-downs by chamber A, B, C causes the cool dose of one group of pipeline of flowing through with vaporization.Utilize indoor blower 100,101,102 air blast during the refrigerant vaporization, room air is cooled.Thereby this chilled air enters the indoor room refrigeration of finishing.
In the process of a room refrigeration, judge in step S8 whether the quantity of operating indoor set changes.According to the result of determination of step S8, if the quantity of operating indoor set does not change (when being not), then return step S7, all steps before the repeated execution of steps S7 continue a room refrigeration.
If the quantity of operating indoor set changes (being when being), execution in step S9 then, control device 154 judge whether two rooms refrigeration, if not to two rooms refrigeration (when being not), execution in step S10 then, control device 154 judges whether three rooms is freezed.
According to the result of determination of step S10, if not, then return execution in step S8 to three rooms refrigeration (when being not), and continuous step before repeating.If to three rooms refrigeration when being (be), then execution in step S11.Referring to Fig. 8, the indoor blower of control device 154 A of opening chamber, B, C also all is set to 180 grades with the electric control expansion valve 130,131,132 of chamber A, B, C.
As mentioned above, when the opening degree to 180 of regulating electric control expansion valve 130,131,132 grade, when adapting to the three rooms refrigeration, because the increase (room changes three rooms into) of operating indoor set quantity, the load that 30 moments of compressor reduce is reduced.In step S12, injecting its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is 180 grades electric control expansion valve 130,131,132, thereby has prevented because the acute variation of the increase generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, in the shortest time, realizing the three rooms refrigerating operaton.
On the other hand, according to the result of determination of step S9, if carry out two rooms refrigeration (being when being), then execution in step S13.Referring to Fig. 8, control device 154 is opened in the indoor blowers 100,101,102 two to carry out two rooms (chamber A+B, chamber B+C, chamber A+C) refrigeration, and two opening degree in the electric control expansion valve 130,131,132 is set to set open degree simultaneously: 210 grades.
As mentioned above, two opening degree to 210 in the electric control expansion valve 130,131,132 of regulating operating indoor set (chamber A+B, chamber B+C, chamber A+C) grade, when freezing to adapt to two rooms, since the increase (room changes two rooms into) of operating indoor set quantity, the load moment reduction of compressor 30.In step S14, injecting its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is 210 grades two of electric control expansion valve 130,131,132, thereby has prevented because the acute variation of the increase generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, realizing two room refrigerating operatons.
Referring to Fig. 6, in the time of below will introducing two rooms refrigeration, according to the variation of operating indoor set quantity, the control method of electric control expansion valve of the present invention.
When air-conditioning was connected power supply, in step S21, control device 154 started air-conditioning by the DC voltage by supply unit 150 outputs.Simultaneously, the user sets the quantity (for example: two rooms freeze) in refrigeration room by the operating key on the operating control device 152.In step S22, control device 154 judges whether to have imported run signal.
According to step S22 result of determination, if do not import run signal (when being not), the then all steps before the repeating step S22; If imported run signal (being when being), execution in step S23 then, control device 154 is judged will be to two rooms refrigeration.
According to the result of determination of step S23, if not to two room refrigeration (when being not), the then all steps before the repeating step S23; If to two rooms refrigeration when being (be), then execution in step S24.Referring to Fig. 8, control device 154 outputs one control signal to indoor blower motor driver 160 and valve actuator 164, to open operating indoor set (chamber A+B, chamber B+C, chamber A+C) corresponding indoor blower, i.e. two in the indoor blower 100,101,102; And be arranged at set open degree with two in the corresponding electric control expansion valve 130,131,132: 210 grades, to adapt to two room refrigerating operatons.
Follow execution in step S25, control device 154 judges whether TS is lower than TR.
According to the result of determination of step S25, if TS is not less than TR (when being not), the then all steps before the repeated execution of steps S25; If TS is lower than TR (when being not), then carry out next step S26, control device 154 starts compressor 30 and outdoor blowers 41 by compressor drive apparatus and outdoor motor drive unit 160.
When compressor 30 and outdoor blowers 41 startups, HTHP steam state refrigerant is discharged from the compressor 30 of off-premises station 20, and in the flood chamber outer heat-exchanger 40.The steam state refrigerant of this HTHP carries out heat exchange at outdoor heat converter 40 places with the air that blows out by outdoor blowers, forms the liquid cryogen of room temperature high pressure after the condensation.
Be injected into being arranged among in 210 grades the electric control expansion valve 130,131,132 two (electric control expansion valve of other off-duty indoor set is closed) of chamber A, B, C at the liquid cryogen of the room temperature high pressure of outdoor heat converter 40 places condensation gained, and decompression forms the white shape refrigerant of low-temp low-pressure, flows into two in the indoor heat converter 90,91,92 of chamber A, B, C then.
Through two in the electric control expansion valve 130,131,132 of chamber A, B, C post-decompression low-temp low-pressure frost shape refrigerant through one group of pipeline with vaporization.Utilize indoor blower 100,101,102 to discharge during the refrigerant vaporization with the room air cooling and with heat.Chilled then air enters indoor, thereby finishes the refrigeration in two rooms.
When two rooms freezed, in step S28, control device 154 judged that the quantity of operating indoor set has no change.
According to the determination step of step S28, if the quantity of operating indoor set does not change (when being not), then return step S27, and all steps before the repeated execution of steps S27, the refrigeration in two rooms of continuation.
If the quantity of operating indoor set changes (being when being), execution in step S29 then, control device 154 judges whether a room refrigeration.If not a room refrigeration (when being not) is carried out next step S30 together, control device 154 judges whether the three rooms refrigeration.
According to the result of determination of step S30, if not, then return execution in step S28 and subsequent step to three rooms refrigeration (when being not).On the other hand, if, then carry out next step S31, the indoor blower 100,101,102 of control device 154 A of opening chamber, B, C to three rooms refrigeration when being (be).And the electric control expansion valve 130,131,132 of chamber A, B, C all opened to set open degree: 180 grades, to adapt to the three rooms refrigeration.
When the opening degree to 180 of the electric control expansion valve 130,131,132 of regulating operating indoor set (chamber A+B+C) grade, when freezing to adapt to three rooms, since the increase (two rooms change three rooms into) of operating indoor set quantity, the load moment reduction of compressor 30.In step S32, injecting its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is 180 grades electric control expansion valve 130,131,132, thereby has prevented because the acute variation of the increase generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, in the shortest time, realizing the three rooms refrigerating operaton.
On the other hand, according to the result of determination of step S29, if to room refrigeration when being (be), then execution in step S23.Referring to Fig. 8, in control device 154 priming chamber A, B, the C indoor blower 100,101,102 one with the refrigeration (chamber A, B or C) of carrying out a room, and is arranged at 250 grades with one open degree in the electric control expansion valve 130,131,132.
As mentioned above, one opening degree to 250 in the electric control expansion valve 130,131,132 of regulating operating indoor set (chamber A, B or C) grade, when freezing to adapt to a room, because the minimizing (two rooms change a room into) of operating indoor set quantity, the load moment increment of compressor 30 reduces.In step S34, injecting electric control expansion valve 130,131,132 its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is that of 250 grades, thereby has prevented because the acute variation of the minimizing generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, in the shortest time, realizing a room refrigerating operaton.
Referring to Fig. 7, in the time of below will introducing the three rooms refrigeration, according to the variation of operating indoor set quantity, the control method of electric control expansion valve of the present invention.
When air-conditioning was connected power supply, in step S41, control device 154 started air-conditioning by the DC voltage by supply unit 150 outputs.Simultaneously, the user sets the quantity (for example: three rooms freezes) in refrigeration room by the operating key on the operating control device 152.
Then, in step S42, control device 154 judges whether to have imported run signal.According to the result of determination of step S42, if run signal is imported (being when being) then execution in step S43, control device 154 judges whether the three rooms refrigeration.
According to the result of determination of step S43, if not to three rooms refrigeration (when being not), the then all steps before the repeated execution of steps S43.
If, then carry out next step S44 to three rooms refrigeration when being (be).Control device 154 outputs one control signal to indoor blower motor driver 162 and valve actuator 164, driving the indoor blower 100,101,102 of all operating indoor sets (chamber A+B+C), and the open degree of all electric control expansion valves 130,131,132 is arranged at rank 180.
Follow execution in step S45, control device 154 judges whether TS is lower than TR.
According to the result of determination of step S45, if TS is not less than then repeating step S45 all steps before of TR (when being not); If TS is lower than TR (being when being), execution in step S46 then, control device 154 starts compressor 30 and outdoor blowers.
When compressor 30 and outdoor blowers startup, in step S47, HTHP steam state refrigerant is discharged from the compressor 30 of off-premises station 20, and in the flood chamber outer heat-exchanger 40.The steam state refrigerant of this HTHP carries out heat exchange at outdoor heat converter 40 places with the air that blows out by outdoor blowers, forms the liquid cryogen of room temperature high pressure after the condensation.
Be injected into 180 grades the electric control expansion valve 130,131,132 of being arranged on of chamber A, B, C at the liquid cryogen of the room temperature high pressure of outdoor heat converter 40 places condensation gained, and decompression forms the refrigerant of the easy vaporization of low-temp low-pressure, flows into the indoor heat converter 90,91,92 of chamber A, B, C then.
Utilize indoor blower 100,101,102 to discharge when vaporizing with the room air cooling and with heat through electric control expansion valve 130,131, the 132 post-decompression low-temp low-pressure refrigerant of chamber A, B, C.Chilled then air enters indoor, thereby finishes the refrigeration (chamber A+B+C) of three rooms.
When three rooms freezed, execution in step S48, control device 154 judged whether operating indoor set changes.
According to the result of determination of step S48, if operating indoor set quantity does not change (when being not), then return execution in step S47, and repeat subsequent step, proceed the refrigeration of three rooms; If the quantity of operating indoor set changes (being when being), then receive next step S49, control device 154 judges whether two room refrigeration.If not two rooms refrigeration (when being not), execution in step S50 then, control device 154 judges whether a room refrigeration.
According to the result of determination of step S50, if not, then return execution in step S48 to a room refrigeration (when being not), and repeat continuous thereafter step.If to room refrigeration when being (be), execution in step S51 then, referring to Fig. 8, in the indoor blower of control device 154 A of opening chamber, B, C one, and with a corresponding open degree that is arranged at 250 grades in the electric control expansion valve 130,131,132.
As mentioned above, one opening degree to 250 in regulating electric control expansion valve 130,131,132 grade, when freezing to adapt to a room (chamber A, B or C), because the minimizing (two rooms change a room into) of operating indoor set quantity, the load that the moment of compressor 30 increases is lowered.In step S52, injecting its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is 250 grades electric control expansion valve 130,131,132 corresponding, thereby has prevented because the acute variation of the minimizing generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, in the shortest time, realizing a room refrigerating operaton.
On the other hand, according to the result of determination of step S49, if carry out two rooms refrigeration (being when being), then execution in step S53.Referring to Fig. 8, control device 154 is opened in the indoor blowers 100,101,102 two to carry out two rooms (chamber A+B, chamber B+C, chamber A+C) refrigeration, and corresponding two opening degree is set to set open degree in the electric control expansion valve 130,131,132 simultaneously: 210 grades.
As mentioned above, two opening degree to 210 in the electric control expansion valve 130,131,132 of regulating operating indoor set (chamber A+B, chamber B+C, chamber A+C) grade, when freezing to adapt to two rooms, because the minimizing (three rooms changes two rooms into) of operating indoor set quantity, the load that the moment of compressor 30 increases is lowered.In step S54, injecting its open degree at the liquid cryogen of the condensed room temperature high pressure in outdoor heat converter 40 places is 210 grades two of electric control expansion valve 130,131,132, thereby has prevented because the acute variation of the minimizing generation refrigerant cycle of the quantity of operating indoor set.The circulation of the best refrigerant when therefore, in the shortest time, realizing two room refrigerating operatons.
The control method of electric control expansion valve of the present invention has the following advantages: the most in short-term Between in, electric control expansion valve is arranged at best opening degree, to stablize following of refrigerant Ring is when the quantity of operating indoor set changes, according to operating indoor set The opening degree of number change control electric control expansion valve, flow into operating with control The refrigerant flow of indoor set is realized the control to the optimum cycle of refrigerant.
Claims (3)
1. the control method of the electric control expansion valve of the composite air conditioner of many indoor sets of an off-premises station connection can be freezed to a plurality of rooms simultaneously, and it may further comprise the steps:
According to the quantity of operating indoor set, regulate the opening degree of electric control expansion valve, flow into the refrigerant flow of operating indoor set with control;
The quantity of judging the indoor set that carries out refrigerating operaton has no change;
According to the quantity of the operating indoor set of being judged in the previous step, regulate the opening degree of electric control expansion valve.
2. the control method of the electric control expansion valve of composite air conditioner according to claim 1 is characterized in that: in the step of the open degree of regulating electric control expansion valve, along with the increase of operating indoor set quantity, the open degree of electric control expansion valve slightly reduces.
3. the control method of the electric control expansion valve of composite air conditioner according to claim 1 and 2 is characterized in that: in the step of the open degree of regulating electric control expansion valve, be in the indoor set institute corresponding electric control expansion valve maintenance closed condition of stopped status.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990024436A KR20010003908A (en) | 1999-06-26 | 1999-06-26 | expansion valve control method of multitude-type air conditioner |
| KR9924436 | 1999-06-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288134A CN1288134A (en) | 2001-03-21 |
| CN1122156C true CN1122156C (en) | 2003-09-24 |
Family
ID=19595584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00100835A Expired - Fee Related CN1122156C (en) | 1999-06-26 | 2000-02-16 | Method for controlling electric control expansion valve of composite air conditioner |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR20010003908A (en) |
| CN (1) | CN1122156C (en) |
| ES (1) | ES2186463B1 (en) |
| IT (1) | IT1307628B1 (en) |
| PT (1) | PT102394B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940023B (en) * | 2013-01-21 | 2018-05-25 | 山东朗进科技股份有限公司 | One kind one drags more air-conditioning expansion valve intelligent control methods |
| CN104515270B (en) * | 2013-09-28 | 2018-12-11 | 杭州三花研究院有限公司 | A kind of air-conditioning system and its control method |
| CN105864920B (en) * | 2016-03-31 | 2019-02-19 | 华为技术有限公司 | A kind of underloading dehumanization method and air-conditioning |
| CN111023270A (en) * | 2019-12-31 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and device of electronic expansion valve, air conditioner and storage medium |
| CN114234353B (en) * | 2021-12-20 | 2023-03-21 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve of multi-connected unit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131843A (en) * | 1983-01-17 | 1984-07-28 | Toshiba Corp | Air conditioner |
| JPS6124937A (en) * | 1984-07-16 | 1986-02-03 | Mitsubishi Electric Corp | Control of multiple room air-conditioning system |
| JPS6475860A (en) * | 1987-09-11 | 1989-03-22 | Matsushita Refrigeration | Multiple chamber type air conditioner |
| JP2568747B2 (en) * | 1990-03-06 | 1997-01-08 | 松下電器産業株式会社 | Multi-room air conditioner |
| JPH06294541A (en) * | 1993-04-08 | 1994-10-21 | Matsushita Refrig Co Ltd | Cooling controller for multiple room type airconditioning apparatus |
| JPH06323673A (en) * | 1993-05-19 | 1994-11-25 | Hitachi Ltd | Multi-room type air-conditioner |
| JP3708245B2 (en) * | 1996-09-12 | 2005-10-19 | 三菱電機株式会社 | Motorized valve controller for multi-function heat pump system |
| JP3327158B2 (en) * | 1997-02-07 | 2002-09-24 | 松下電器産業株式会社 | Multi-room air conditioner |
| KR20000039232A (en) * | 1998-12-11 | 2000-07-05 | 구자홍 | Method for controlling linear expansion valve for multi type air conditioner |
-
1999
- 1999-06-26 KR KR1019990024436A patent/KR20010003908A/en not_active Application Discontinuation
- 1999-12-21 PT PT102394A patent/PT102394B/en not_active IP Right Cessation
- 1999-12-23 ES ES009902832A patent/ES2186463B1/en not_active Expired - Fee Related
- 1999-12-24 IT IT1999RM000796A patent/IT1307628B1/en active
-
2000
- 2000-02-16 CN CN00100835A patent/CN1122156C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM990796A0 (en) | 1999-12-24 |
| PT102394B (en) | 2003-10-31 |
| IT1307628B1 (en) | 2001-11-14 |
| CN1288134A (en) | 2001-03-21 |
| ES2186463A1 (en) | 2003-05-01 |
| ITRM990796A1 (en) | 2001-06-25 |
| ES2186463B1 (en) | 2004-09-16 |
| PT102394A (en) | 2000-12-29 |
| KR20010003908A (en) | 2001-01-15 |
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