CN104634009A - Control method for air conditioner circulation device - Google Patents
Control method for air conditioner circulation device Download PDFInfo
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- CN104634009A CN104634009A CN201310567382.1A CN201310567382A CN104634009A CN 104634009 A CN104634009 A CN 104634009A CN 201310567382 A CN201310567382 A CN 201310567382A CN 104634009 A CN104634009 A CN 104634009A
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- temperature
- control
- heat exchanger
- control valve
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F24F11/62—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
- F24F2110/00—Control inputs relating to air properties
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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
- F25B41/30—Expansion means; Dispositions thereof
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a control method for an air conditioner circulation device. The air conditioner circulation device further comprises a first control valve, a second throttling element, a heat storing device, a third throttling element and a second control valve. The first control valve is arranged between a four-way valve and an air sucking opening of a compressor, and a heat storing heat exchanger of the heat storing device is connected with the first control valve in parallel after being connected with the second throttling element in series. The control method includes the following steps that firstly, when refrigerating and heating operation is started, the first control valve is controlled to be opened, and the second control valve is controlled to be closed; secondly, in the refrigerating and heating operation process, the temperature of the heat storing device is detected, and the first control valve is controlled to be closed and opened according to the detected temperature of the heat storing device. According to the control method for the air conditioner circulation device, the temperature of the heat storing device can be within the reasonable range in the normal refrigerating and heating state, and therefore deterioration and transition evaporation of a heat storing material are avoided, and the function reliability of the heat storing material is ensured.
Description
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of control method of Air-conditioning Cycle device.
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 Cycle device, 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 Cycle device provided by the present invention, described Air-conditioning Cycle device comprises the compressor connected by pipeline, cross valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, described Air-conditioning Cycle device also comprises the first control valve, second section fluid element, regenerative apparatus, 3rd restricting element and the second control valve, described first control valve is arranged on the pipeline between described cross valve and described compressor air suction mouth, 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 is in parallel with described first control valve after connecting with described second section fluid element, described second section fluid element and described second control valve connect after one end be connected with the pipeline between described outdoor heat exchanger and described first throttle element, the other end is connected with the pipeline between described indoor heat exchanger and described cross valve, described control method comprises the steps:
S1, start refrigeration and heating operation time, control described first control valve open, control described second control valve close;
In S2, refrigeration and heating process, detect described regenerative apparatus temperature, control closedown and the unlatching of described first control valve according to the described regenerative apparatus temperature detected.
Wherein in an embodiment, described step S2 is specially:
S21, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S22;
S22, control described first control valve close, judge whether the temperature of described regenerative apparatus is less than or equal to design temperature A1, if so, then control described first control valve open, wherein A1 < A3.
Wherein in an embodiment, described step S21 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 step S22 also comprises: control the throttle degree reducing described first throttle element while described first control valve is closed.
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 described 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 second control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described cross valve transfer 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 between the described outdoor environment temperature that judgement detects 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 element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, 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 described 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 Cycle device of the present invention, by detecting regenerative apparatus temperature, the action of the first control valve is controlled according to the regenerative apparatus temperature detected, regenerative apparatus is made normally to freeze and heat under state temperature in rational scope, thus make heat-storing material that rotten and transition evaporation not occur, ensure 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 Cycle device in one of them embodiment of the present invention;
Fig. 2 is the control flow chart of the refrigerating operaton of the device of Air-conditioning Cycle shown in Fig. 1;
The heating operation that Fig. 3 is the device of Air-conditioning Cycle shown in Fig. 1 is to the control flow chart of Defrost operation;
The control flow chart that the heating and defrosting that Fig. 4 is the device of Air-conditioning Cycle shown in Fig. 1 runs;
Fig. 5 is the control flow chart of the special Defrost operation of the device of Air-conditioning Cycle shown in Fig. 1;
Fig. 6 starts temperature for defrosting that the outdoor environment temperature of the device of Air-conditioning Cycle 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 the device of Air-conditioning Cycle shown in Fig. 1.
Description of reference numerals: 01-compressor; 10-indoor heat exchanger; 20-outdoor heat exchanger; 07-first control valve; 08-second control valve; 25-cross valve; 30-first throttle element; 31-second section fluid element; 32-the 3rd restricting element; 35-regenerative apparatus; 40-outdoor environment temperature checkout gear; 50-outdoor heat exchanger outlet temperature checkout gear; 60-regenerative apparatus temperature-detecting device; 70-indoor environment temperature checkout gear; 80-indoor heat exchanger temperature-detecting device; 90-outdoor heat exchanger inlet temperature checkout gear.
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 Cycle device in one of them embodiment of the present invention, this Air-conditioning Cycle device comprises: compressor 01, cross valve 25, outdoor heat exchanger 20, first throttle element 30, indoor heat exchanger 10, second section fluid element 31, regenerative apparatus 35, first control valve 07, 3rd restricting element 32, second control valve 08, for detecting the outdoor environment temperature checkout gear 40 of outdoor environment temperature, the outdoor heat exchanger outlet temperature checkout gear 50 of outdoor heat exchanger outlet temperature when heating for detecting, for detecting the regenerative apparatus temperature-detecting device 60 of regenerative apparatus temperature, for detecting the indoor environment temperature checkout gear 70 of indoor environment temperature, for heat exchange temperature in sensing chamber indoor heat exchanger temperature-detecting device 80 and for detect heat time outdoor heat exchanger inlet temperature outdoor heat exchanger inlet temperature checkout gear 90, wherein, compressor 01, cross valve 25, outdoor heat exchanger 20, first throttle element 30 and indoor heat exchanger 10 are connected to form refrigerant circulation loop by pipeline, described first control valve 07 is arranged on the pipeline between described cross valve 25 and described compressor 01 air entry, described regenerative apparatus 35 comprises being loaded on the heat-storing material in heat storage tank and utilizing the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange for accumulation compressor 01 used heat, described regenerative heat exchanger is in parallel with described first control valve 07 after connecting with described second section fluid element 31, described second section fluid element 31 connect with described second control valve 08 after one end be connected with the pipeline between described outdoor heat exchanger 20 and described first throttle element 30, the other end is connected with the pipeline between described indoor heat exchanger 10 and described cross valve 25.Described first control valve 07 is preferably magnetic valve or expansion valve, when the first control valve 07 is expansion valve, in this description " unlatching of the first control valve " refer to expansion valve opening and be adjusted to maximum, " closedown of the first control valve " refers to expansion valve opening and is adjusted to minimum.Described second control valve 08 is preferably magnetic valve.
Fig. 2,3 is depicted as the flow chart of the Air-conditioning Cycle apparatus control method in the present embodiment, and control method comprises the steps:
Step S1, start refrigeration and heating operation time, control described first control valve 07 and open, control described second control valve 08 and close.
During refrigeration, high-temperature high-pressure refrigerant is discharged from compressor 01 exhaust outlet, through cross valve 25 laggard enter outdoor heat exchanger 20, after outdoor air heat exchange, through first throttle element 30 throttling, enter indoor heat exchanger 10, with room air heat exchange, room air is lowered the temperature, then flows back to compressor 01 air entry through cross valve 25, first control valve 07.When heating, cross valve 25 commutates, high-temperature high-pressure refrigerant is discharged from compressor 01 exhaust outlet, through cross valve 25 laggard enter indoor heat exchanger 10, after room air heat exchange, indoor air temperature is raised, then through first throttle element 30 throttling, enter outdoor heat exchanger 20, after outdoor air heat exchange, then flow back to compressor 01 air entry through cross valve 25, first control valve 07.Refrigeration and heating process in, compressor 01 generation used heat be accumulated in the heat-storing material of regenerative apparatus 35.
In step S2, refrigeration and heating process, detect described regenerative apparatus 35 temperature, control closedown and the unlatching of described first control valve 07 according to described regenerative apparatus 35 temperature detected, do not go bad in rational scope with the temperature controlling heat-storing material.
Preferably, described step S2 is specially:
Step S21, judge whether described regenerative apparatus 35 temperature is more than or equal to design temperature A3, if so, then proceeds to step S22;
Step S22, control described first control valve 07 and close, proceed to step S23;
Step S23, judge whether the temperature of described regenerative apparatus 35 is less than or equal to design temperature A1, if so, proceeds to step S24, wherein A1 < A3;
Step S24, control described first control valve 07 and open.
Air-conditioning Cycle device in the present embodiment is owing to have employed this kind of control method, when regenerative apparatus 35 temperature exceedes design temperature A3, first control valve 07 is closed, low-temperature refrigerant is through second section fluid element 31 throttling, temperature reduces further, then enters the regenerative heat exchanger of regenerative apparatus 35, carries out heat exchange with heat-storing material, thus heat-storing material temperature is reduced, reach the object of protection regenerative apparatus 35; When Air-conditioning Cycle device is reduced to design temperature A1, the first control valve 07 is opened.By this control mode, can ensure that regenerative apparatus 35 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 A1, A3 is determined by the character of heat-storing material, and in the present embodiment, A3 value is 70 ~ 90 DEG C, and the span of A1 is 50 ~ 60 DEG C.
Further, described step S21 also comprises: judge whether described regenerative apparatus 35 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 35 constant temperature raises reach A4, compressor 01 is out of service, thus reaches the object of reliably protecting regenerative apparatus 35.In the present embodiment, A4 span is 75 ~ 95 DEG C.
Further, described step S22 also comprises: control the throttle degree reducing described first throttle element 30 while described first control valve 07 is closed, refrigerant flow is not reduced.
Figure 3 shows that the control flow chart of heating operation to Defrost operation of Air-conditioning Cycle device, as shown in Figure 3, the control method of Air-conditioning Cycle device also comprises:
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 Cycle device in the present embodiment.As shown in Figure 5, defrosting control method comprises:
Step B31, detect described regenerative apparatus 35 temperature, judge enter special Defrost operation or enter conventional Defrost operation according to described regenerative apparatus 35 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 35 temperature is more than or equal to design temperature A2, if, proceed to step B32, then enter special Defrost operation, if not, proceed to step B33, then enter conventional Defrost operation, wherein A2 < A1 < A3.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 second control valve 08 and open, 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 does not commutate, high-temperature high-pressure refrigerant is discharged from compressor 01 exhaust outlet, after cross valve 25, part of refrigerant enters indoor heat exchanger 10, after room air heat exchange, indoor air temperature is raised, then through first throttle element 30 throttling, another part cold-producing medium is through the second control valve 08 and the 3rd restricting element 32, enter outdoor heat exchanger 20 together with merging with the cold-producing medium that first throttle element 30 flows out to defrost, after outdoor air heat exchange, then through cross valve 25, first control valve 07 flows back to compressor 01 air entry.
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.
Like this, during defrosting, cold-producing medium enters regenerative heat exchanger after second section fluid element 31 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.
Step B33, control described cross valve 25 transfer to refrigeration direction, then control described compressor 01 frequency and rise to defrosting frequency, carry out routine defrost.Conventional defrosting and refrigerating operaton, do not repeat them here.
Preferably, described step B33 also comprises:
In step B332, conventional 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 B333 is proceeded to;
Step B333, control described first control valve 07 and close.
Like this, during defrosting, cold-producing medium enters regenerative heat exchanger after second section fluid element 31 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 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 element 30;
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 element 30, 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 first throttle element 30 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 Cycle device 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, directly 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 (17)
1. the control method of an Air-conditioning Cycle device, described Air-conditioning Cycle device comprises the compressor connected by pipeline, cross valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, it is characterized in that, described Air-conditioning Cycle device also comprises the first control valve, second section fluid element, regenerative apparatus, 3rd restricting element and the second control valve, described first control valve is arranged on the pipeline between described cross valve and described compressor air suction mouth, 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 is in parallel with described first control valve after connecting with described second section fluid element, described second section fluid element and described second control valve connect after one end be connected with the pipeline between described outdoor heat exchanger and described first throttle element, the other end is connected with the pipeline between described indoor heat exchanger and described cross valve, described control method comprises the steps:
S1, start refrigeration and heating operation time, control described first control valve open, control described second control valve close;
In S2, refrigeration and heating process, detect described regenerative apparatus temperature, control closedown and the unlatching of described first control valve according to the described regenerative apparatus temperature detected.
2. control method according to claim 1, is characterized in that, described step S2 is specially:
S21, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S22;
S22, control described first control valve close, judge whether the temperature of described regenerative apparatus is less than or equal to design temperature A1, if so, then control described first control valve open, wherein A1 < A3.
3. control method according to claim 2, it is characterized in that, described step S21 also comprises: judge whether described regenerative apparatus temperature is more than or equal to design temperature A4, if, then control described compressor to close, wherein A4 > A3.
4. control method according to claim 2, is characterized in that, described step S22 also comprises: control the throttle degree reducing described first throttle element while described first control valve is closed.
5. control method as claimed in any of claims 1 to 4, 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.
6. control method according to claim 5, 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 described 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.
7. control method according to claim 5, 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 second control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described cross valve transfer to refrigeration direction, then control described compressor frequency and rise to defrosting frequency, carry out routine defrost.
8. control method according to claim 7, 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.
9. control method according to claim 7, 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.
10. control method according to claim 7, 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.
11. control methods according to claim 7, 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.
12. control methods according to claim 7, 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 between the described outdoor environment temperature that judgement detects and 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 7, is characterized in that, described step B33 also comprises:
Control aperture to the first aperture of described first throttle element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, wherein, described second aperture is greater than described first aperture.
14. control methods according to claim 7, 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.
15. control methods according to claim 7, 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.
16. control methods according to claim 7, 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 described defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
17. control methods according to claim 16, 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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| CN110486891A (en) * | 2019-08-22 | 2019-11-22 | 海信（山东）空调有限公司 | A kind of defrosting control method and air conditioner |
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