CN104633871A - Control method of air conditioning system - Google Patents
Control method of air conditioning system Download PDFInfo
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- CN104633871A CN104633871A CN201310567399.7A CN201310567399A CN104633871A CN 104633871 A CN104633871 A CN 104633871A CN 201310567399 A CN201310567399 A CN 201310567399A CN 104633871 A CN104633871 A CN 104633871A
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
- Thermal Sciences (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
Abstract
The invention discloses a control method of an air conditioning system. The air conditioning system comprises a compressor, a four-way valve, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger and further comprises a second throttling element, a heat storage device, a first control valve, a second control valve, a third control valve and a fourth control valve. The control method includes the steps that when refrigerating and heating operation is started, the first control valve is controlled to be opened, and the second control valve, the third control valve and the fourth control valve are controlled to be closed; in the refrigerating and heating operation process, the temperature of the heat storage device is detected, and the first control valve, the second control valve, the third control valve and the fourth control valve are controlled to be opened and closed according to the detected temperature of the heat storage device. By the adoption of the control method of the air conditioning system, when the heat storage device is normally refrigerated and heated, no deterioration or excessive evaporation is generated when the temperature is within the reasonable range, and the reliability of the functions of the air conditioning system is guaranteed.
Description
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of control method of air-conditioning system.
Background technology
Heat pump type air conditioner is when low temperature heating operates, and outdoor heat exchanger surface can form frost layer, in order to not affect heating effect, usually the Defrost mode adopted at present is that pattern is transferred to refrigeration mode, this kind of Defrost mode to indoor radiation cold, can cause fluctuations in indoor temperature large, affects comfortableness.
In order to head it off, the measure adopted in current industry installs regenerative apparatus around compressor of outdoor unit, utilizes regenerative apparatus to accumulate the defrosting of compressor used heat.Although this mode can realize indoor in the process of defrosting certain input heat, amount of stored heat also has good utilization.But freeze or heating operation time, regenerative apparatus absorbs compressor heat, may Yin Wendu too high and occur the problem that heat-storing material is rotten, affect regenerative apparatus performance.
Summary of the invention
For above-mentioned prior art present situation, technical problem to be solved by this invention is, provides a kind of control method of air-conditioning system, guarantees that regenerative apparatus temperature is in rational scope, avoids heat-storing material to go bad, ensures the reliability of its function.
In order to solve the problems of the technologies described above, the control method of a kind of air-conditioning system provided by the present invention, described air-conditioning system comprises the compressor be connected by pipeline, cross valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, described air-conditioning system also comprises second section fluid element, regenerative apparatus, first control valve, second control valve, 3rd control valve and the 4th control valve, described first control valve is arranged on the pipeline between described first throttle element and described indoor heat exchanger, described regenerative apparatus comprises the heat-storing material for accumulating compressor used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange, described regenerative heat exchanger one end is connected with the pipeline between described first throttle element and described first control valve through second section fluid element, the other end is divided into two-way, one tunnel second control valve is connected with the increasing enthalpy mouth of described compressor, another Lu Jing tri-control valve is connected with the pipeline between described indoor heat exchanger and described cross valve, described 4th control valve one end is connected with the pipeline between the first control valve and described indoor heat exchanger, the other end is connected with the pipeline between regenerative heat exchanger and described second control valve, described control method comprises:
When starting refrigeration and heating operation, control described first control valve and open, control described second control valve, described 3rd control valve and described 4th control valve and close;
Freeze and in heating process, detect described regenerative apparatus temperature, controlling the opening and closing of described first control valve, described second control valve, described 3rd control valve and described 4th control valve according to the described regenerative apparatus temperature detected.
Wherein in an embodiment, described control method also comprises:
Freeze and in heating process, detect outdoor environment temperature, judging whether to need to increase enthalpy according to the described outdoor environment temperature detected, and control the opening and closing of described second control valve according to judged result.
Wherein in an embodiment, described control method comprises:
S1, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4;
S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5;
S3, control described second control valve and open, enter and increase enthalpy and run;
S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, if not, proceed to step S5;
Control described 3rd control valve when S5, refrigeration to open; Control described first control valve when heating to close, control described 4th control valve and open.
Wherein in an embodiment, judge whether that the step needing to increase enthalpy comprises according to outdoor environment temperature:
During refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy;
During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.
Wherein in an embodiment, described step S1 also comprises: judge whether described regenerative apparatus temperature is more than or equal to design temperature A4, if so, then controls described compressor and closes, wherein A4>A3.
Wherein in an embodiment, described control method also comprises:
In heating process, detect indoor environment temperature and described regenerative apparatus temperature, if the difference of the indoor environment temperature detected and user's design temperature is less than or equal to design temperature E1, and the described regenerative apparatus temperature detected is less than or equal to design temperature A1, controls described 3rd control valve and open; If the described regenerative apparatus temperature detected is more than or equal to design temperature A2, controls described 3rd control valve and close, wherein, A2>A1.
Wherein in an embodiment, described control method also comprises the steps:
In B1, heating process, detect described indoor heat exchanger temperature, described outdoor heat exchanger inlet temperature, outdoor environment temperature and continuous heating running time;
B2, according to the described indoor heat exchanger temperature that detects and/or described outdoor heat exchanger inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3;
B3, enter Defrost operation;
In B4, Defrost operation process, detect described outdoor heat exchange actuator temperature, outdoor environment temperature and defrosting time, according to the described outdoor heat exchange actuator temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to;
B5, exit Defrost operation.
Wherein in an embodiment, described step B2 is specially:
B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between the described indoor heat exchanger temperature that judgement detects in real time and the indoor heat exchanger maximum temperature detected above is more than or equal to design temperature A5, if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between the described outdoor heat exchanger inlet temperature that B22, judgement detect and the outdoor heat exchange actuator temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6, if, then proceed to described step B3, if not, then proceed to step B23;
B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
Wherein in an embodiment, described step B3 comprises:
B31, detect described regenerative apparatus temperature, judge enter special Defrost operation or enter conventional Defrost operation according to the described regenerative apparatus temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33;
B32, control described cross valve go to refrigeration direction, control described 3rd control valve and described 4th control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described cross valve go to refrigeration direction, then control described compressor frequency and rise to defrosting frequency, carry out routine defrost.
Wherein in an embodiment, described step B31 is specially:
Judge whether described regenerative apparatus temperature is more than or equal to design temperature A2, if so, then enter special Defrost operation, if not, then enter conventional Defrost operation.
Wherein in an embodiment, described step B32 also comprises:
In special Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and close.
Wherein in an embodiment, described step B32 also comprises:
In special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger inlet temperature, whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
Wherein in an embodiment, described step B33 also comprises:
In conventional Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and close.
Wherein in an embodiment, described step B33 also comprises:
In conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger, when whether the difference DELTA T2 judging between described outdoor environment temperature and outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
Wherein in an embodiment, described step B33 also comprises:
Control aperture to the first aperture of described first throttle device, after setting-up time Time4, control aperture to the second aperture of described first throttle device, wherein, described second aperture is greater than described first aperture.
Wherein in an embodiment, also comprise before described step 31:
Reduce described compressor frequency, when compressor frequency is reduced to setpoint frequency, or when the pressure that detects of high pressure sensor is less than setting value, proceed to described step B31.
Wherein in an embodiment, also comprise before described step B31:
Inner blower low windscreen in control room runs, heat exchange temperature in real-time sensing chamber, judges whether the indoor heat exchanger temperature detected is less than design temperature A8, and if so, control room inner blower is out of service.
Wherein in an embodiment, described step B4 is specially:
Judge whether the described outdoor heat exchange actuator temperature detected is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, judge whether defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
Wherein in an embodiment, during special Defrost operation, if proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A; Before entering described step B31, judge whether stored counts reaches n time, if so, proceed to described B33, and stored counts is reset.
Compared with prior art, the control method of air-conditioning system of the present invention, according to the temperature of the regenerative apparatus detected, control the action of the first control valve, the second control valve, the 3rd control valve and the 4th control valve, make regenerative apparatus under normally freezing and heating state, temperature does not go bad in rational scope, and transition is evaporated, and ensures the reliability of its function.
The beneficial effect that additional technical feature of the present invention has will be set forth in specific embodiment of the invention part.
Accompanying drawing explanation
Fig. 1 is the system diagram of the air-conditioning system in one of them embodiment of the present invention;
Fig. 2 is the control flow chart of the refrigerating operaton of air-conditioning system shown in Fig. 1;
The heating operation of Fig. 3 for air-conditioning system shown in Fig. 1 and the control flow chart of Defrost operation;
Fig. 4 is the control flow chart of the Defrost operation of air-conditioning system shown in Fig. 1;
The control flow chart of the special Defrost operation that Fig. 5 is air-conditioning system shown in Fig. 1;
Fig. 6 starts temperature for defrosting that the outdoor environment temperature of air-conditioning system shown in Fig. 1 is corresponding and special defrosting enters pipe temperature correction figure;
The regenerative apparatus protecting control skeleton diagram based on regenerative apparatus temperature that Fig. 7 is air-conditioning system shown in Fig. 1.
Description of reference numerals: 01-compressor; 06-second control valve; 07-first control valve; 08-the 3rd control valve; 09-the 4th control valve; 10-indoor heat exchanger; 15-regenerative apparatus; 20-outdoor heat exchanger; 25-cross valve; 26-second section fluid element; 30-first throttle element; 40-indoor environment temperature checkout gear; 50-indoor heat exchanger temperature-detecting device 70-outdoor heat exchanger temperature-detecting device; 60-outdoor environment temperature checkout gear; 80-regenerative apparatus temperature-detecting device.
Detailed description of the invention
And the present invention is described in detail in conjunction with the embodiments below with reference to the accompanying drawings.It should be noted that, when not conflicting, the feature in following embodiment and embodiment can combine mutually.
Figure 1 shows that the system diagram of the air-conditioning system in the embodiment of the present invention one, as shown in Figure 1, air-conditioning system comprises the increasing enthalpy compressor 01 connected by pipeline, cross valve 25, outdoor heat exchanger 20, first throttle element 30, indoor heat exchanger 10, for detecting the indoor environment temperature checkout gear 40 of indoor environment temperature, for the indoor heat exchanger temperature-detecting device 50 of heat exchange temperature in sensing chamber, for detecting the regenerative apparatus temperature-detecting device 80 of regenerative apparatus temperature and the outdoor environment temperature checkout gear 60 for detecting outdoor environment temperature, described air-conditioning system also comprises second section fluid element 26, regenerative apparatus 15, first control valve 07, second control valve 06, 3rd control valve 08 and the 4th control valve 09, described first control valve 07 is arranged on the pipeline between described first throttle element 30 and described indoor heat exchanger 10, described regenerative apparatus 15 comprises the heat-storing material for accumulating compressor 01 used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange, described regenerative heat exchanger one end is connected with the pipeline between described first throttle element 30 and described first control valve 07 through second section fluid element 26, the other end is divided into two-way, one tunnel second control valve 06 is connected with the increasing enthalpy mouth of described compressor 01, another Lu Jing tri-control valve 08 is connected with the pipeline between described indoor heat exchanger 10 and described cross valve 25, described 4th control valve 09 one end is connected with the pipeline between the first control valve 07 and described indoor heat exchanger 10, the other end is connected with the pipeline between regenerative heat exchanger and described second control valve 06.First control valve 07, second control valve 06, the 3rd control valve 08 and the 4th control valve 09 are preferably magnetic valve.
Figure 2 shows that the control flow chart of the refrigerating operaton of the air-conditioning system of the present embodiment, Figure 3 shows that the heating operation of the air-conditioning system in the present embodiment and the control flow chart of Defrost operation.As shown in Figure 2,3, the air conditioner system control method in the present embodiment comprises the steps:
Step S0, when starting refrigeration and heating operation, control described first control valve 07 and open, control described second control valve 06, described 3rd control valve 08 and described 4th control valve 09 and close.
As shown in Figure 1, during refrigeration, cold-producing medium is through compressor 01, flow into cross valve 25, enter outdoor heat exchanger 20, condensing heat-exchange is carried out in outdoor heat exchanger 20, cold-producing medium is again through first throttle element 30 reducing pressure by regulating flow, arrive indoor heat exchanger 10 after reducing pressure by regulating flow, in indoor heat exchanger 10, carry out evaporation and heat-exchange, the heat inside absorption chamber, reduce the temperature of indoor, cold-producing medium is heated to form saturated or superheat state, then gets back to compressor 01 air entry end through cross valve 25 loop, completes a complete kind of refrigeration cycle.
When heating, compressor 01 pumps into cross valve 25 high temperature and high pressure gaseous refrigerant, and the flow of refrigerant through cross valve 25 enters indoor heat exchanger 10, carries out forced-convection heat transfer herein, achieves and heat of high temperature is passed to indoor, promotes the effect of indoor temperature.Cold-producing medium arrives in outdoor heat exchanger 20 through first throttle element 30 and carries out heat absorption evaporation process, absorbs the heat of air herein.Cold-producing medium is heated to form saturated or oversaturated cold-producing medium, and cross valve 25 gets back to compressor 01 air entry subsequently, completes one and complete heats circulation.While above-mentioned heating operation, the heat that the spontaneous collection of this regenerative apparatus 15 meeting is distributed from compressor 01 periphery.
Step S1, judge whether described regenerative apparatus 15 temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4.
Step S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5.Preferably, judge whether that the step needing to increase enthalpy comprises according to outdoor environment temperature: during refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy; During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.
Step S3, control described second control valve 06 and open, enter and increase enthalpy and run.
As shown in Figure 1, during refrigerating operaton, when the second control valve 06 is opened, a gas-liquid two-phase refrigerant branches part after throttling enters further reducing pressure by regulating flow in second section fluid element 26, rear cold-producing medium flows in regenerative apparatus 15 heat absorbing heat-storing material and absorb, and makes the cold-producing medium through regenerative apparatus 15 reach oversaturated state.Rear inflow secondary increases enthalpy air entry.Realize opening while refrigeration increasing enthalpy process, improve the cold medium flux getting back to compressor 01.When the higher refrigeration of outdoor temperature, delivery temperature is higher, and compressor 01 load is higher, now opens enthalpy-increasing function, has both reduced regenerative apparatus 15 temperature, again reduces compressor 01 load, improves the efficiency of complete machine.When the lower refrigeration of outdoor temperature, lowered the temperature to regenerative apparatus 15 by bypass one road cold-producing medium, refrigerant flow does not reduce simultaneously, avoids heat accumulation function to lose efficacy.
During heating operation, when the second control valve 06 is opened, reducing pressure by regulating flow in second section fluid element 26 is entered through a condensed gas-liquid two-phase refrigerant branches part, rear cold-producing medium flows in regenerative apparatus 15 heat absorbing heat-storing material and absorb, and makes the cold-producing medium through regenerative apparatus 15 reach oversaturated state.Rear inflow secondary increases enthalpy air entry.Realize opening while heating increasing enthalpy process.When outdoor temperature is lower heat time, open and increase enthalpy loop, the circulating mass of refrigerant now heated increases, the corresponding increase of heating capacity, and simultaneously regenerative apparatus 15 temperature also can not be too high, avoids Problem of Failure.Outdoor temperature is higher heat time, lowered the temperature to regenerative apparatus 15 by bypass one road cold-producing medium, avoid regenerative apparatus 15 to lose efficacy.
Step S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, proceed to step S5 if not.
Control described 3rd control valve 08 when step S5, refrigeration to open, control described first control valve 07 when heating and close, control described 4th control valve 09 and open.By this control mode, can ensure that regenerative apparatus 15 is under normally freezing and heating state, temperature does not go bad in rational scope, and transition is evaporated, and ensures the reliability of its function.The size of A3 is determined by the character of heat-storing material, and in the present embodiment, A3 value is 70 ~ 90 DEG C.
The control method of the air-conditioning system in the present embodiment, regenerative apparatus 15 both may be used for defrosting, and the comfortableness of user during improving defrosting, is normally freezing and heating lower use again, added refrigerating capacity under refrigeration, heating mode and heating capacity and efficiency.And, reduce the risk that regenerative apparatus 15 lost efficacy because temperature is too high.
Further, described step S1 also comprises: judge whether described regenerative apparatus 15 temperature is more than or equal to design temperature A4, if so, then controls described compressor 01 and closes, wherein A4>A3.If regenerative apparatus 15 constant temperature raises reach A4, compressor 01 is out of service, thus reaches the object of reliably protecting regenerative apparatus 15.In the present embodiment, A4 span is 75 ~ 95 DEG C.
Further, described control method also comprises: in heating process, detect indoor environment temperature and described regenerative apparatus 15 temperature, if the difference of the indoor environment temperature detected and user's design temperature is less than or equal to design temperature E1, and described regenerative apparatus 15 temperature detected is less than or equal to design temperature A1, controls described 3rd control valve 08 and open; If described regenerative apparatus 15 temperature detected is more than or equal to design temperature A2, controls described 3rd control valve 08 and close, wherein, A2>A1.Such control can not affect to regenerative apparatus 15 accumulation of heat user uses when regenerative apparatus 15 accumulation of heat is not enough, have enough heat supply chamber external heat exchangers 20 during guarantee defrosting.The target frequency that also can improve compressor 01 operation when opening the 3rd control valve 08 heats not affect indoor.
Figure 3 shows that the control flow chart of the heating operation of air-conditioning system, as shown in Figure 3, control method during air-conditioning system heating and defrosting is as follows:
Step B1, detect described indoor heat exchanger 10 temperature, described outdoor heat exchanger 20 inlet temperature, outdoor environment temperature and continuous heating running time;
Step B2, according to described indoor heat exchanger 10 temperature and/or described outdoor heat exchanger 20 inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3.
More preferably, described step B2 is specially:
Step B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between described indoor heat exchanger 10 temperature that judgement detects in real time and indoor heat exchanger 10 maximum temperature detected above is more than or equal to design temperature A5 (A5 is preferably 3 ~ 10 DEG C), if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between described outdoor heat exchanger 20 inlet temperature that step B22, judgement detect and outdoor heat exchanger 20 temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6 (A6 is preferably-25 ~ 1 DEG C), if, then proceed to described step B3, if not, then step B23 is proceeded to;
Step B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
The present embodiment adopts three condition judgment whether to enter Defrost operation, effectively can judge outdoor heat exchanger 20 frosting degree, and three condition complementations, avoid certain condition and lost efficacy or occurred deviation and cause frosting seriously and not to defrost phenomenon, affect heating effect.
Step B3, enter Defrost operation.
In step B4, Defrost operation process, detect described outdoor heat exchanger 20 temperature, outdoor environment temperature and defrosting time, according to described outdoor heat exchanger 20 temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to.
Step B5, exit Defrost operation.
Figure 5 shows that the control flow chart of the Defrost operation of the air-conditioning system in the present embodiment.As shown in Figure 5, defrosting control method comprises:
Step B31, detect described regenerative apparatus 15 temperature, judge enter special Defrost operation or enter conventional Defrost operation according to described regenerative apparatus 15 temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33.
More preferably, described step B31 is specially: judge whether described regenerative apparatus 15 temperature is more than or equal to design temperature A2, if so, proceeds to step B32, then enters special Defrost operation, if not, proceed to step B33, then enter conventional Defrost operation.Can provide inside enough heat supply chambers as much as possible by this control and outdoor heat exchanger defrosting, avoid shortage of heat and affect indoor comfortableness and outdoor heat exchanger defrosting.The span of the design temperature A2 in the present embodiment is 25 ~ 35 DEG C.
B32, control described cross valve 25 go to refrigeration direction, control described first control valve 07, described 3rd control valve 08 and described 4th control valve 09 to open, control described second control valve 06 to close, then control described compressor 01 frequency and rise to defrosting frequency, carry out special defrosting.
See Fig. 1, during special Defrost operation, cross valve 25 goes to refrigeration direction, high-temperature high-pressure refrigerant is discharged from compressor 01 exhaust outlet, through cross valve 25, enters outdoor heat exchanger 20, after first throttle element 30, a part is through the 3rd control valve 08 and the 4th control valve 09, and flow back to compressor 01 air entry, another part flows back to compressor 01 air entry after indoor heat exchanger 10.
Preferably, described step B32 also comprises:
In step B322, special Defrost operation process, detect described compressor 01 delivery temperature or suction superheat, judge whether whether described compressor 01 delivery temperature be less than setting value (this setting value is preferably 1 ~ 3 DEG C) lower than setting value D1 (D1 is preferably 45 ~ 60 DEG C) or suction superheat, if so, step B323 is proceeded to;
Step B323, control described first control valve 07 and close.
During such defrosting, cold-producing medium enters regenerative heat exchanger after second section fluid element 26 throttling, flows back to compressor 01 with after heat-storing material heat exchange.Can provide inside enough heat supply chambers as much as possible by this control and outdoor heat exchanger defrosting, avoid shortage of heat and affect indoor comfortableness and outdoor heat exchanger defrosting.
Preferably, described step B32 also comprises:
In B324, special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger 20 inlet temperature, when whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger 20 inlet temperature is less than design temperature A7 (A7 is preferably 0 ~ 2 DEG C), if so, step B325 is proceeded to;
Step B325, control outdoor fan are out of service.
Control outdoor fan in this way, make full use of the defrosting of outdoor environment heat, reduce defrosting time, reduce defrosting energy resource consumption.
B33, control described cross valve 25 and go to refrigeration direction, control described second control valve 06 and described 3rd control valve 08 is closed, control described first control valve 07 and open, then control described compressor 01 frequency and rise to defrosting frequency, carry out routine and defrost.Conventional defrosting and refrigerating operaton, do not repeat them here.
Preferably, described step B33 also comprises:
In step B334, conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger 20, when whether the difference DELTA T2 judging between described outdoor environment temperature and outdoor heat exchanger 20 inlet temperature is less than design temperature A7 (A7 is preferably 0 ~ 2 DEG C), if so, then step B335 is proceeded to;
Step B335, then control outdoor fan out of service.
Control outdoor fan in this way, make full use of the defrosting of outdoor environment heat, reduce defrosting time, reduce defrosting energy resource consumption.
Preferably, described step B33 also comprises:
Step B336, control aperture to the first aperture L (L is preferably 150 ~ 350) of described first throttle device;
Step B337, after setting-up time Time4, proceed to step B338;
Step B338, control aperture to the second aperture M (preferably, L+50≤M≤L+100) of described first throttle device, wherein, described second aperture is greater than described first aperture.
This control mode, because outdoor heat exchanger 20 temperature is lower when defrosting starts, the little maintenance being conducive to delivery temperature of throttling arrangement aperture, but when after Defrost operation certain hour, outdoor heat exchanger 20 top frost layer is melted, the invalid heat release of meeting, more high heat waste is more serious for delivery temperature, by increasing the mode of refrigerant flow, namely adding the heat for defrosting, again reducing the waste of heat, be conducive to the integrality defrosted.
Preferably, also comprise before step B31:
If step B301 meets the condition entering Defrost operation, inner blower low windscreen in control room runs;
Step B302, in real time detection indoor heat exchanger 10 temperature, judge whether indoor heat exchanger 10 temperature detected is less than design temperature A8 (A8 is preferably 20 ~ 28 DEG C), if so, proceeds to step B303;
Step B303, control room inner blower are out of service.
This kind of control can effectively avoid indoor fan operate and cause user's sense of discomfort, and heat can be concentrated to remove outdoor heat exchanger 20 frost simultaneously.Indoor heat exchanger 10 is by the indoor heat transfer of radiation direction.
Preferably, also comprise before described step B31:
If B304 meets the condition entering Defrost operation, reduce described compressor 01 frequency, judge whether compressor 01 frequency is less than or equal to setpoint frequency (20-40HZ), if so, proceeds to step B31, proceeds to step B305 if not;
Step B305, when judging whether the pressure that high pressure sensor detects is less than or equal to setting value (1-2MPa), if so, proceed to step B31, proceed to step B306 if not;
Step B307, reduce described compressor 01 frequency.
Controlled by this, the noise produced when the first control valve 07 and cross valve 25 are opened can be reduced, and prevent valve body from damaging under High Pressure Difference.
The control method of the air-conditioning system in the present embodiment, because cold-producing medium during special defrosting leads to indoor heat exchanger 10 and outdoor heat exchanger 20 simultaneously, make indoor have certain heat, do not have cold emission, user is comfortable; And when conventional defrosting and special defrosting, employing is not shut down and is transformed into Defrost mode, shortens defrosting time, improves heating load total in some cycles.
Preferably, described step B4 is specially:
Judge whether the described outdoor heat exchange actuator temperature detected is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, judge whether described defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
Figure 5 shows that special defrosting is to heating running control flow chart, Fig. 6 is that defrosting that outdoor environment temperature is corresponding starts temperature and special defrosting enters pipe temperature correction figure.As shown in Figure 5,6, according to the reason exiting defrosting, judge that next time enters mode and the condition of defrosting, namely in special Defrost operation, if be because the temperature of outdoor heat exchanger 20 reaches outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature after having defrosted, then normally run; If proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A (such as 1 DEG C); Before entering described step B31, judge whether stored counts reaches n time (n is preferably 2 times), if so, proceeds to described B31, carry out routine defrosting, and stored counts is reset.Heat required during in order to save defrosting, by such control mode, modifying factor outside cause causes defrosting clean, can remove the frost layer of outdoor heat exchanger 20 as much as possible, improve indoor heating amount.
In Fig. 6, enter the corresponding line of temperature of defrosting when β line represents and normally heats, α represents revised and enters the corresponding line of defrosting temperature, preferably, and β+1≤α≤β+5.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (19)
1. the control method of an air-conditioning system, described air-conditioning system comprises the compressor be connected by pipeline, cross valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, it is characterized in that, described air-conditioning system also comprises second section fluid element, regenerative apparatus, first control valve, second control valve, 3rd control valve and the 4th control valve, described first control valve is arranged on the pipeline between described first throttle element and described indoor heat exchanger, described regenerative apparatus comprises the heat-storing material for accumulating compressor used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange, described regenerative heat exchanger one end is connected with the pipeline between described first throttle element and described first control valve through second section fluid element, the other end is divided into two-way, one tunnel second control valve is connected with the increasing enthalpy mouth of described compressor, another Lu Jing tri-control valve is connected with the pipeline between described indoor heat exchanger and described cross valve, described 4th control valve one end is connected with the pipeline between the first control valve and described indoor heat exchanger, the other end is connected with the pipeline between regenerative heat exchanger and described second control valve, described control method comprises:
When starting refrigeration and heating operation, control described first control valve and open, control described second control valve, described 3rd control valve and described 4th control valve and close;
Freeze and in heating process, detect described regenerative apparatus temperature, controlling the opening and closing of described first control valve, described second control valve, described 3rd control valve and described 4th control valve according to the described regenerative apparatus temperature detected.
2. control method according to claim 1, is characterized in that, described control method also comprises:
Freeze and in heating process, detect outdoor environment temperature, judging whether to need to increase enthalpy according to the described outdoor environment temperature detected, and control the opening and closing of described second control valve according to judged result.
3. control method according to claim 2, is characterized in that, described control method comprises:
S1, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4;
S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5;
S3, control described second control valve and open, enter and increase enthalpy and run;
S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, if not, proceed to step S5;
Control described 3rd control valve when S5, refrigeration to open; Control described first control valve when heating to close, control described 4th control valve and open.
4. control method according to claim 3, is characterized in that, judges whether that the step needing to increase enthalpy comprises according to outdoor environment temperature:
During refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy;
During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.
5. control method according to claim 3, is characterized in that, described step S1 also comprises: judge whether described regenerative apparatus temperature is more than or equal to design temperature A4, if so, then controls described compressor and closes, wherein A4>A3.
6. control method according to claim 1, is characterized in that, described control method also comprises:
In heating process, detect indoor environment temperature and described regenerative apparatus temperature, if the difference of the indoor environment temperature detected and user's design temperature is less than or equal to design temperature E1, and the described regenerative apparatus temperature detected is less than or equal to design temperature A1, controls described 3rd control valve and open; If the described regenerative apparatus temperature detected is more than or equal to design temperature A2, controls described 3rd control valve and close, wherein, A2>A1.
7. control method as claimed in any of claims 1 to 6, is characterized in that, described control method also comprises the steps:
In B1, heating process, detect described indoor heat exchanger temperature, described outdoor heat exchanger inlet temperature, outdoor environment temperature and continuous heating running time;
B2, according to the described indoor heat exchanger temperature that detects and/or described outdoor heat exchanger inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3;
B3, enter Defrost operation;
In B4, Defrost operation process, detect described outdoor heat exchange actuator temperature, outdoor environment temperature and defrosting time, according to the described outdoor heat exchange actuator temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to;
B5, exit Defrost operation.
8. control method according to claim 7, is characterized in that, described step B2 is specially:
B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between the described indoor heat exchanger temperature that judgement detects in real time and the indoor heat exchanger maximum temperature detected above is more than or equal to design temperature A5, if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between the described outdoor heat exchanger inlet temperature that B22, judgement detect and the outdoor heat exchange actuator temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6, if, then proceed to described step B3, if not, then proceed to step B23;
B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
9. control method according to claim 7, is characterized in that, described step B3 comprises:
B31, detect described regenerative apparatus temperature, judge enter special Defrost operation or enter conventional Defrost operation according to the described regenerative apparatus temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33;
B32, control described cross valve go to refrigeration direction, control described 3rd control valve and described 4th control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described cross valve go to refrigeration direction, then control described compressor frequency and rise to defrosting frequency, carry out routine defrost.
10. control method according to claim 9, is characterized in that, described step B31 is specially:
Judge whether described regenerative apparatus temperature is more than or equal to design temperature A2, if so, then enter special Defrost operation, if not, then enter conventional Defrost operation.
11. control methods according to claim 9, is characterized in that, described step B32 also comprises:
In special Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and close.
12. control methods according to claim 9, is characterized in that, described step B32 also comprises:
In special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger inlet temperature, whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
13. control methods according to claim 9, is characterized in that, described step B33 also comprises:
In conventional Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and close.
14. control methods according to claim 9, is characterized in that, described step B33 also comprises:
In conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger, when whether the difference DELTA T2 judging between described outdoor environment temperature and outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
15. control methods according to claim 9, is characterized in that, described step B33 also comprises:
Control aperture to the first aperture of described first throttle device, after setting-up time Time4, control aperture to the second aperture of described first throttle device, wherein, described second aperture is greater than described first aperture.
16. control methods according to claim 9, is characterized in that, also comprise before described step 31:
Reduce described compressor frequency, when compressor frequency is reduced to setpoint frequency, or when the pressure that detects of high pressure sensor is less than setting value, proceed to described step B31.
17. control methods according to claim 9, is characterized in that, also comprise before described step B31:
Inner blower low windscreen in control room runs, heat exchange temperature in real-time sensing chamber, judges whether the indoor heat exchanger temperature detected is less than design temperature A8, and if so, control room inner blower is out of service.
18. control methods according to claim 9, is characterized in that, described step B4 is specially:
Judge whether the described outdoor heat exchange actuator temperature detected is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, judge whether defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
19. control methods according to claim 18, is characterized in that, during special Defrost operation, if proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A; Before entering described step B31, judge whether stored counts reaches n time, if so, proceed to described B33, and stored counts is reset.
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